WO2023116317A1

WO2023116317A1 - Remote sensing method and apparatus

Info

Publication number: WO2023116317A1
Application number: PCT/CN2022/133519
Authority: WO
Inventors: �龙昊
Original assignee: 华为技术有限公司
Priority date: 2021-12-22
Filing date: 2022-11-22
Publication date: 2023-06-29
Also published as: CN116337121A

Abstract

A remote sensing method, applied to a sensing system comprising a signal end (310) and a sensing end (320), comprising: (S210) sending a first signal to the sensing end (320), the first signal being used for detecting the state of an object to be measured; (S220) receiving a second signal, from the sensing end (320), responding to the first signal, the second signal being determined on the basis of the state of said object; and (S240) obtaining phase and/or amplitude information of the second signal, the phase and/or amplitude information of the second signal being used for determining the state of said object. By means of remote state sensing, the problem of difficulty in deployment in relatively severe environments such as underground and workshops in current sensing technology is solved, and high-sensitivity and easy-to-deploy remote sensing can be achieved.

Description

Method and device for remote sensing

This application claims the priority of a Chinese patent application with application number 202111580845.9 and application title "Method and Apparatus for Remote Sensing" filed with the China Patent Office on December 22, 2021, the entire contents of which are hereby incorporated by reference in this application .

technical field

The embodiments of the present application relate to the field of perception, and more specifically, to a method and device for long-distance perception.

Background technique

As a detection device, the sensor can perceive the measured information, and can transform the perceived information into electrical signals or other required forms of information output according to certain rules, so as to meet the requirements of information transmission, processing, storage, display, and recording. and control requirements. In intelligent manufacturing, coal mining and other scenarios, there are a large number of environmental and state perception requirements, such as abnormal perception of equipment status, harmful gas leakage, liquid component concentration, etc., so these scenarios have a large number of sensor requirements.

Take coal mining as an example: roof disasters are the most common and most likely accidents in coal mines, and pressure sensors need to be used to monitor the deformation of roadways at all times; coal seams are often accompanied by the presence of gas (methane, etc.), which can easily cause explosion accidents, so it is necessary to deploy A large number of gas sensors are used to monitor harmful gases, etc.; the failure of large equipment such as coal shearers and hydraulic supports may also cause disasters, and a large number of sensors need to be deployed at key locations to monitor the status of equipment.

For these relatively harsh environments, sensors usually need long-term monitoring in such flammable and explosive environments, and their sensitivity, reliability, power consumption, etc. have high requirements.

However, the current sensing technology solutions are difficult to deploy in relatively harsh environments such as underground and workshops. For example, the current optical fiber sensing has high sensitivity, but requires long-distance deployment of optical fibers; the current wireless sensing does not need to pull optical fibers, but Additional power supply is required for the wireless communication module, and the sensitivity is lower than that of optical fiber sensing.

Therefore, how to achieve high-sensitivity and easy-to-deploy long-distance sensing is an urgent problem to be solved.

Contents of the invention

Embodiments of the present application provide a method and device for long-distance sensing to achieve high-sensitivity and easy-to-deploy sensing technology.

In the first aspect, a method for long-distance sensing is provided, and the method may be executed by a signal end, or may also be executed by a chip or a circuit used for the signal end, which is not limited in the present application. For ease of description, the implementation by the signal terminal is taken as an example below.

The method includes: the signal end sends a first signal to the sensing end, the first signal is used to detect the state of the object to be measured; the signal end receives a second signal from the sensing end in response to the first signal, the second signal is based on the The state of the object is determined; the signal terminal obtains the phase and/or amplitude information of the second signal, and the phase and/or amplitude information of the second signal is used to determine the state of the object to be measured.

It should be noted that this implementation is applicable to a perception system, and the perception system includes a signal end and a perception end.

Exemplarily, the object to be measured may be close to the sensor, or close to the sensor. For example, the distance between the object to be measured and the sensor may be 0.1 m, etc., which is not specifically limited in the present application. The object to be measured can be one of solid, liquid, gas, or non-material existence such as electric field, magnetic field, heat, and gravity.

It should be understood that the first signal is a radio frequency detection signal, and the second signal is a detection response signal. Wherein, the radio frequency detection signal and the radio frequency response signal may be a terahertz (Tera Hertz, THz) signal, a millimeter wave signal, etc., which are not specifically limited in this application.

According to the solution provided by this application, the problem of difficult deployment of current sensing technology in relatively harsh environments such as underground and workshops is solved through remote state perception.

With reference to the first aspect, in some implementation manners of the first aspect, the sending the first signal from the signal end to the sensing end includes: sending the first signal from the signal end to the sensing end through the first antenna.

With reference to the first aspect, in some implementations of the first aspect, the signal end receiving the second signal from the sensing end in response to the first signal includes: the signal end receiving the second signal from the sensing end in response to the first signal through the first antenna. Signal.

In this implementation manner, the signal end uses the same antenna to transmit and receive signals.

With reference to the first aspect, in some implementation manners of the first aspect, the signal terminal generates the first signal through a signal generator.

With reference to the first aspect, in some implementations of the first aspect, the signal end receives the second signal from the sensing end that responds to the first signal, including: the signal end receives the second signal from the sensing end that responds to the first signal through the second antenna. Signal.

In this implementation manner, the signal end uses an independent transmitting and receiving antenna to realize signal transmitting and receiving.

With reference to the first aspect, in some implementation manners of the first aspect, the signal end sends the first signal to the sensing end through the first antenna, including: the signal end transmits the first signal to the first circulator through the first port of the first circulator. The second port of a circulator is used to send the first signal to the sensing end through the first antenna, and the second port of the first circulator is connected to the first antenna. Correspondingly, the signal end receives the second signal through the first antenna, and transmits the second signal to the third port through the second port of the first circulator, and the third port of the first circulator is connected to the signal receiver.

In this implementation, by using the first circulator with high isolation to realize the sharing of the transmitting and receiving antennas, the first circulator at the signal end is required to have high isolation, which can prevent the interference of the transmitted signal on the received signal at the signal end.

Optionally, the sharing of the transmitting and receiving antennas can also be realized by using the first radio frequency switch, and the signal transmission and signal reception can be processed in time division, thereby avoiding the interference of the signal transmitted by the signal terminal on the received signal.

With reference to the first aspect, in some implementations of the first aspect, the first signal may be a pulse signal or a continuous wave signal, that is, a radio frequency detection signal, and the signal end receives the second signal transmitted by the sensor at the sensing end, that is, a radio frequency response signal , and perform state perception of the object to be measured based on the radio frequency response signal.

In this implementation manner, the radio frequency response signal is a transmission signal. While the sensor at the sensing end has the ability to transmit radio frequency signals, its transmission characteristics will be affected by the state of the object to be measured. The sensing end sends the signal transmitted by the sensor to the signal end, and the signal end can judge the state of the object to be measured by analyzing the signal.

With reference to the first aspect, in some implementations of the first aspect, the first signal may be a pulse signal or a continuous wave signal, that is, a radio frequency detection signal, and the signal end receives the second signal reflected by the sensor at the sensing end, that is, a radio frequency response signal , and the state perception of the object to be tested is performed based on the radio frequency response signal.

In this implementation manner, the radio frequency response signal is a reflected signal. While the sensor at the sensing end has the ability to reflect radio frequency signals, its reflection frequency will be affected by the state of the object to be measured. The sensing end sends the signal reflected by the sensor to the signal end, and the signal end can judge the state of the object to be measured by analyzing the signal.

It should be understood that in this embodiment of the present application, information such as phase, amplitude, and frequency may be equivalent. The frequency information of the radio frequency response signal is actually a frequency component with a strong amplitude in the reflected signal.

In combination with the first aspect, in some implementations of the first aspect, the signal end sends a third signal to the sensing end, the third signal is used to detect the state of the object to be measured, and the frequency of the third signal is different from the frequency of the first signal The signal end receives the fourth signal from the sensing end in response to the third signal, the fourth signal is determined based on the state of the object to be measured; the signal end obtains the phase and/or amplitude information of the fourth signal, and the phase and/or amplitude information of the fourth signal The/or amplitude information is used in combination with the phase and/or amplitude information of the second signal to determine the state of the object to be measured.

In this implementation, the state of the object to be measured is judged by performing spectral analysis on multiple detection signals (for example, the first signal and the third signal) and multiple response signals (for example, the second signal and the fourth signal) . To a certain extent, the accuracy rate of long-distance perception of the state information of the object to be measured can be guaranteed.

In this implementation, the effect of the state of the object to be measured on the radio frequency signal transmission (for example, dispersion, attenuation, etc.) is used to perform long-distance sensing.

It should be noted that this implementation adopts a frequency sweep mode, that is, the acquisition of a wide frequency range is completed by switching frequency points. For example, the signal end and _the sensing end send and receive detection signals and response signals of N different frequencies (for example, f ₁ , f ₂ , .

Optionally, the technical solution of the present application may not use the frequency sweep mode, that is, the signal end directly sends a broadband radio frequency detection signal, and receives and analyzes a corresponding radio frequency response signal. For example, the signal end and the sensing end send and receive broadband detection signals and response signals, and extract N different frequency (eg, f ₁ , f ₂ , ..., f _N ) detection signal components from the frequency range of the broadband signal And the response signal components to realize the remote perception of the state of the object to be measured.

Optionally, the technical solution of the present application can also send and receive multiple wideband radio frequency signals in a frequency sweep mode, that is, complete the collection of multiple wideband signals by switching frequency points. For example, the signal end and the sensing end transmit and receive broadband signals of n sub-bands (for example, band ₁ , band ₂ , ..., band _n ), and extract N different frequencies (for example, f ₁ , f ₂ , ..., f _N ) detection signal and response signal to realize the remote perception of the state of the object to be measured. Wherein, n is less than or equal to N.

In the second aspect, a method for long-distance sensing is provided, and the method may be executed by a sensing end, or may also be executed by a chip or a circuit used for the sensing end, which is not limited in the present application. For ease of description, the implementation by the sensing end is taken as an example below for description.

The method includes: the sensing end receives a first signal from the signal end, and the first signal is used to detect the state of the object to be measured; the sensor at the sensing end responds to the first signal based on the state of the object to be measured to obtain a second signal; The signal end sends the second signal.

It should be understood that the first signal is a radio frequency detection signal, and the second signal is a detection response signal. Wherein, the radio frequency detection signal and the radio frequency response signal may be a terahertz signal, a millimeter wave signal, etc., which are not specifically limited in this application.

With reference to the second aspect, in some implementation manners of the second aspect, the sensing end receiving the first signal from the signal end includes: the sensing end receiving the first signal from the signal end through a third antenna.

In a possible implementation, while the sensor at the sensing end has the ability to transmit radio frequency signals, its transmission characteristics will be affected by the state of the object to be measured. The sensing end sends the signal transmitted by the sensor to the signal end, and the signal end can judge the state of the object to be measured by analyzing the signal.

Another possible implementation is that the sensor at the sensing end has the ability to reflect radio frequency signals, and its reflection frequency will be affected by the state of the object to be measured. The sensing end sends the signal reflected by the sensor to the signal end, and the signal end can judge the state of the object to be measured by analyzing the signal.

With reference to the second aspect, in some implementation manners of the second aspect, the sensing end sending the second signal to the signal end includes: the sensing end sending the second signal to the signal end through a third antenna.

With reference to the second aspect, in some implementation manners of the second aspect, the sensing end sending the second signal to the signal end includes: the sensing end sending the second signal to the signal end through the fourth antenna.

In this implementation manner, the sensing end uses an independent transceiver antenna to realize signal transmission and reception.

With reference to the second aspect, in some implementations of the second aspect, the sensing end receives the first signal from the signal end through the third antenna, including: the sensing end transmits the second signal to the first signal through the third port of the second circulator The first port of the second circulator receives the first signal from the signal terminal through the third antenna, and the first port of the second circulator is connected to the third antenna. Correspondingly, the sensing end receives the first signal through the third antenna, and transmits the first signal to the second port through the first port of the second circulator, and the second port of the second circulator is connected to the sensor.

In this implementation, the use of the high-isolation second circulator to realize the sharing of the transmitting and receiving antenna requires the second circulator at the signal end to have high isolation, which can prevent the interference of the transmitted signal on the received signal at the signal end.

Optionally, the sharing of the transmitting and receiving antennas can also be realized by using the second radio frequency switch, and signal transmission and signal reception can be processed in a time-division manner, thereby avoiding the interference of the signal transmitted by the signal terminal on the received signal.

In combination with the second aspect, in some implementations of the second aspect, the sensing end receives a third signal from the signal end, the third signal is used to detect the state of the object to be measured, and the frequency of the third signal is different from the frequency of the first signal ; The sensor at the sensing end responds to the third signal based on the state of the object to be measured to obtain a fourth signal; the sensing end sends the fourth signal to the signal end.

In this implementation, the state of the object to be measured is judged by performing spectral analysis on multiple detection signals (eg, the first signal and the third signal) and multiple response signals (eg, the second signal and the fourth signal). To a certain extent, the accuracy rate of long-distance perception of the state information of the object to be measured can be guaranteed.

Optionally, the technical solution of the present application may not use the frequency sweep mode, that is, the signal end directly sends a broadband signal, and receives and analyzes a corresponding signal. For example, the signal end and the sensing end send and receive broadband probe signals and response signals, where N different frequency (eg, f ₁ , f ₂ , ..., f _N ) probe signal components are extracted within the frequency range of the broadband signal And the response signal components to realize the remote perception of the state of the object to be measured.

In a third aspect, there is provided a device for remote sensing, which is characterized in that it is applied to a sensing system, the sensing system includes a signal end and a sensing end, and the device includes: a transmitter, configured to send a first signal to the sensing end, The first signal is used to detect the state of the object to be measured; the receiver is used to receive a second signal from the sensing end in response to the first signal, and the second signal is determined based on the state of the object to be measured; the processor is also used In order to obtain the phase and/or amplitude information of the second signal, the phase and/or amplitude information of the second signal is used to determine the state of the object under test.

With reference to the third aspect, in some implementation manners of the third aspect, the device further includes a signal generator, where the signal generator is configured to generate the first signal.

With reference to the third aspect, in some implementation manners of the third aspect, the transmitter includes a first antenna, and the first antenna is configured to send the first signal to the sensing end.

With reference to the third aspect, in some implementation manners of the third aspect, the receiver includes a first antenna, and the first antenna is configured to receive a second signal from the sensing end that responds to the first signal.

With reference to the third aspect, in some implementation manners of the third aspect, the receiver includes a second antenna, and the second antenna is configured to receive a second signal from the sensing end that responds to the first signal.

Optionally, the device further includes a signal generator, configured to generate the first signal.

With reference to the third aspect, in some implementations of the third aspect, the receiver includes a first circulator, the first circulator includes a first port, a second port, and a third port, and the second port of the first circulator Connected to the first antenna, the second port is connected to the signal generator, the third port is connected to the signal receiver, the first port of the first circulator is used to transmit the first signal to the second port of the first circulator, and Send the first signal to the sensing end through the first antenna. Correspondingly, the signal end receives the second signal through the first antenna, and transmits the second signal to the third port through the second port of the first circulator, and the third port of the first circulator is connected to the signal receiver.

Optionally, the receiver further includes a first radio frequency switch, for example, a single-pole double-throw radio frequency switch SPDT, the role of the first radio frequency switch is similar to that of the first circulator in the remote sensing device, therefore, using the first For the process of transmitting and receiving signals by the radio frequency switch, reference may be made to the implementation manner of the first circulator, which will not be repeated here. .

In this implementation, the sharing of the transmitting and receiving antennas can also be realized by using the first radio frequency switch, and the signal transmission and signal reception can be processed in time division, thereby avoiding the interference of the signal transmitted by the signal terminal on the received signal.

In conjunction with the third aspect, in some implementations of the third aspect, the first signal may be a pulse signal or a continuous wave signal, that is, a radio frequency detection signal, and the receiver is also used for the signal end to receive the second signal transmitted by the sensor at the sensing end. The signal is a radio frequency response signal; the processor is also used to sense the state of the object under test based on the radio frequency response signal.

In conjunction with the third aspect, in some implementations of the third aspect, the first signal may be a pulse signal or a continuous wave signal, that is, a radio frequency detection signal, and the signal end receives the second signal reflected by the sensor at the sensing end, that is, a radio frequency response signal , and the state perception of the object to be tested is performed based on the radio frequency response signal.

In combination with the third aspect, in some implementations of the third aspect, the transmitter is also used to send a third signal to the sensing end, the third signal is used to detect the state of the object to be measured, and the frequency of the third signal is the same as that of the first The frequency of the signal is different; the receiver is also used to receive the fourth signal from the sensing end in response to the third signal, the fourth signal is determined by the sensor based on the state of the object to be measured; the processor is also used to obtain the phase of the fourth signal and/or amplitude information, the phase and/or amplitude information of the fourth signal is used in combination with the phase and/or amplitude information of the second signal to determine the state of the object to be measured.

In a fourth aspect, there is provided a device for remote sensing, which is characterized in that it is applied to a sensing system, the sensing system includes a signal end and a sensing end, and the device includes: a receiver for receiving a first signal from the signal end, The first signal is used to detect the state of the object to be measured; the processor is used to respond to the first signal based on the state of the object to be measured to obtain a second signal; the transmitter is used to send the second signal to the signal terminal.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the device further includes a transmission line. The transmission line (for example, the sensor fiber) includes the sensor; or, the transmission line is independent from the sensor, and the transmission line and the sensor are connected by coupling.

It should be noted that a transmission line refers to a device with a linear structure that transmits electromagnetic energy. It is an important part of a telecommunication system and is used to transmit electromagnetic waves carrying information from one point to another along the route specified by the transmission line. a little.

In this implementation, the transmission line is connected to the third antenna, and is used to transmit the radio frequency detection signal received by the third antenna to the sensor, and transmit the radio frequency response signal generated by the sensor in response to the radio frequency detection signal to the third antenna.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the receiver includes a third antenna, where the third antenna is configured to receive the first signal from the signal end.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the transmitter includes a third antenna, where the third antenna is configured to send the second signal to the signal end.

In this implementation manner, the sensing end uses the same antenna to transmit and receive signals.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the transmitter includes a fourth antenna, where the fourth antenna is used to send the second signal to the signal end.

Optionally, the device may also include a transmission line, which is connected to the third antenna and the fourth antenna, and is used to transmit the radio frequency detection signal received by the third antenna to the sensor, and transmit the radio frequency response signal generated by the sensor in response to the radio frequency detection signal transmitted to the fourth antenna.

With reference to the fourth aspect, in some implementations of the fourth aspect, the receiver includes a second circulator, the second circulator includes a first port, a second port, and a third port, and the first port of the second circulator It is connected with the third antenna, the second port and the third port are respectively connected with the two ends of the transmission line, the third port of the second circulator is used to transmit the second signal to the first port of the second circulator, and through the second The third antenna of the port sends the second signal to the signal end. Correspondingly, the sensing end receives the first signal through the third antenna, and transmits the first signal to the second port through the first port of the second circulator, and the second port of the second circulator is connected to the sensor.

Optionally, a first resistor is included between the third port and the fourth port.

It should be noted that an absorption resistor (for example, a first resistor) is added between the third port and the second port to prevent interference caused by reflected signals from transmission lines or sensors.

Optionally, the receiver further includes a second radio frequency switch, for example, a single pole double throw radio frequency switch SPDT, and the function of the second radio frequency switch is similar to that of the second circulator in the remote sensing device. Therefore, the second radio frequency switch is used For the process of transmitting and receiving signals by the radio frequency switch, reference may be made to the implementation manner of the second circulator, which will not be repeated here.

In this implementation, the use of the second radio frequency switch can also realize the common use of the transmitting and receiving antennas, and can process signal transmission and signal reception in time division, thereby avoiding the interference of signals transmitted by the signal terminal on received signals.

With reference to the fourth aspect, in some implementations of the fourth aspect, the receiver is further configured to receive a third signal from the signal terminal, the third signal is used to detect the state of the object to be measured, and the frequency of the third signal is the same as that of the first The frequencies of the signals are different; the processor is also used to respond to the third signal based on the state of the object to be measured to obtain a fourth signal; the transmitter is also used to send the fourth signal to the signal terminal.

In a fifth aspect, a sensing system is provided, including: a signal end, configured to execute the method in the first aspect above or any possible implementation manner of the first aspect; and/or, a sensing end, configured to execute the second aspect above A method in any possible implementation of the aspect or the second aspect.

A sixth aspect provides a computer-readable storage medium, the computer-readable storage medium stores computer programs or codes, and when the computer programs or codes run on a computer, the computer executes the above-mentioned first aspect or the first aspect The method in any possible implementation manner, or causing the computer to execute the method in the second aspect or any possible implementation manner of the second aspect.

In a seventh aspect, a chip is provided, including at least one processor, the at least one processor is coupled with a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the installed The signal end of the system-on-a-chip executes the method in the first aspect or any one of the possible implementations of the first aspect, and/or makes the sensing end installed with the system-on-a-chip execute the second aspect or any one of the second aspect Methods in Possible Implementations.

Wherein, the chip may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.

In an eighth aspect, a computer program product is provided, the computer program product includes computer program code, and when the computer program code is run by the signal terminal, the signal terminal is made to perform any possible implementation of the above first aspect or the first aspect The method in the manner; or, when the computer program code is run by the sensing end, the sensing end is made to execute the method in the second aspect or any possible implementation manner of the second aspect.

According to the solution of the embodiment of the present application, a method for remote sensing is provided, through remote state sensing, it solves the problem that current sensing technology solutions are difficult to deploy in relatively harsh environments such as underground and workshops (for example, the current optical fiber sensor has High sensitivity, but requires long-distance deployment of optical fibers; current wireless sensing does not need to pull optical fibers, but requires additional power supply for wireless communication modules, and the sensitivity is lower than that of optical fiber sensing), achieving high sensitivity and easy deployment Perception at a distance.

Description of drawings

Fig. 1 is a schematic diagram of an example of the working principle of the distributed optical fiber sensing applicable to the present application.

FIG. 2 is a schematic diagram of an example of a method of long-distance sensing to which the present application is applied.

FIG. 3 is a schematic diagram of an example of a remote sensing device to which the present application is applied.

FIG. 4 is a schematic diagram of an example of a method of remote sensing to which the present application is applied.

FIG. 5 is a schematic diagram of another example of a remote sensing device applicable to the present application.

FIG. 6 is a schematic diagram of another example of the remote sensing method applicable to the present application.

FIG. 7 is a schematic diagram of another example of a remote sensing device applicable to the present application.

FIG. 8 is a schematic diagram of yet another example of the remote sensing method applicable to the present application.

FIG. 9 is a schematic diagram of another example of a remote sensing device applicable to the present application.

FIG. 10 is a schematic diagram of yet another example of the remote sensing method applicable to the present application.

FIG. 11 is a schematic diagram of an example of a remote sensing device to which the present application is applied.

FIG. 12 is a schematic diagram of an example of a remote sensing device to which the present application is applied.

Detailed ways

The technical solution in this application will be described below with reference to the accompanying drawings.

A sensor is a detection device that can perceive the measured information and transform the perceived information into electrical signals or other required forms of information output according to certain rules to meet the needs of information transmission, processing, Storage, display, recording and control requirements.

The characteristics of sensors include miniaturization, digitalization, intelligence, multi-function, systematization and networking. It is the first link to realize automatic detection and automatic control. The existence and development of sensors allow objects to have senses such as touch, taste, and smell, and make objects come alive slowly. Usually according to its basic perception function, it can be divided into ten categories such as thermal sensor, light sensor, gas sensor, force sensor, magnetic sensor, humidity sensor, sound sensor, radiation sensor, color sensor and taste sensor. .

Sensing technology refers to the technology of collecting various forms of information with high precision, high efficiency and high reliability, such as various remote sensing technologies (satellite remote sensing technology, infrared remote sensing technology, etc.) and intelligent sensing technology. Sensing technology is the technology of sensors, which can sense the surrounding environment or special substances. For example, gas sensing, light sensing, temperature and humidity sensing, human body sensing, etc., convert analog signals into digital signals for processing by the central processing unit. The final result will be displayed in the form of gas concentration parameters, light intensity parameters, whether there is human detection within the range, temperature and humidity data, etc.

In intelligent manufacturing, coal mining and other scenarios, there are a large number of environmental and state perception requirements, such as abnormal perception of equipment status, harmful gas leakage, liquid component concentration, etc. These scenarios have a large number of sensor requirements.

Exemplarily, taking coal mining as an example, roof disasters are the most common and most likely accidents in coal mines, and pressure sensors need to be used to monitor the deformation of roadways at all times; coal seams are often accompanied by the presence of gas (methane, etc.), which can easily cause explosion accidents , so it is necessary to deploy a large number of gas sensors to monitor harmful gases, etc.; the failure of large equipment such as coal shearers and hydraulic supports may also cause disasters, and it is necessary to deploy a large number of sensors at key locations to monitor the status of equipment.

Fig. 1 is a schematic diagram of an example of the working principle of the distributed optical fiber sensing applicable to the present application. Distributed optical fiber sensing system is a sensing system that uses optical fiber as sensing sensitive element and transmission signal medium.

The working principle of the distributed optical fiber sensing system is to use the optical fiber as the sensing sensitive element and the transmission signal medium at the same time to detect the temperature and strain changes at different positions along the optical fiber to realize truly distributed measurement.

Exemplarily, as shown in FIG. 1 , the laser emits a beam of light source, and the incident light beam of the light source is transmitted to the modulator through an optical fiber, and in the modulator, through the interaction with the external measured parameters, the optical properties (for example, light Intensity, wavelength, frequency, phase, polarization state, etc.) change and become a modulated optical signal. Then the modulated optical signal is transmitted to the photodetector through the optical fiber, which is used to convert the optical signal into an electrical signal. Finally, the spectrum of the substance is analyzed by a spectrum analyzer to identify information such as the composition and relative content of the substance, and then obtain the measured parameters.

However, in a complex environment, the deployment cost is relatively high. For example, in the coal mine scene, it needs to be deployed along the roadway, which may be more than 20 kilometers long.

Wireless sensors are another sensor technology suitable for use in embodiments of the present application. Wherein, the wireless sensor includes a sensing module and a wireless communication module. The wireless communication module can convert the signal of the sensing module and send it out through radio waves.

Exemplarily, a sensor node consists of a data acquisition module (sensor, A/D converter), a data processing and control module (microprocessor, memory), a communication module (wireless transceiver) and a power supply module (battery, DC/AC energy Converter) etc., among them, the sensor part usually adopts semiconductor sensor.

The system is relatively complex and is an active device that requires an integrated wireless communication module and requires extremely low power consumption. In addition, additional wireless networks need to be deployed for data collection, and semiconductor sensors are relatively less sensitive.

To sum up, sensing technology is difficult to deploy and has low sensitivity in relatively harsh environments, and has high requirements for its sensitivity, reliability, and power consumption. However, there is currently no solution to how to achieve high sensitivity and easy-to-deploy long-distance sensing.

In view of this, the present application provides a method and device for realizing long-distance sensing, which ensures high sensitivity and easy deployment, and solves the problem that current sensing technology solutions are difficult to deploy in relatively harsh environments such as underground and workshops.

In order to facilitate the understanding of the embodiments of the present application, several terms involved in the present application are briefly described first.

1. Terahertz (THz)

Terahertz is one of the fluctuating frequency units, also known as terahertz, or terahertz, equal to 1000000000000Hz, which is usually used to represent the frequency of electromagnetic waves.

Terahertz waves refer to electromagnetic waves with a frequency in the range of 0.1-10THz (wavelength 3000-30μm), which coincide with millimeter waves in the long-wave band and coincide with infrared light in the short-wave band.

2. Millimeter wave

Electromagnetic waves with a wavelength of 1-10 millimeters are called millimeter waves, and their corresponding frequency ranges from 30 to 300 GHz, which are in the wavelength range where microwaves and terahertz waves overlap, so they have the characteristics of both spectrums.

3. Evanescent wave

Evanescent wave refers to a kind of electromagnetic wave that propagates along the medium interface and whose amplitude decays rapidly with the distance from the interface in the direction perpendicular to the interface. Evanescent wave is also called evanescent wave, evanescent wave, evanescent wave, etc. Its amplitude decays exponentially with the increase of depth perpendicular to the interface, and its phase changes with the tangential direction. It should be understood that an evanescent wave is a type of surface wave.

In order to facilitate the understanding of the embodiments of the present application, the following explanations are made:

In the embodiments of the present application, "at least one" means one or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. In the text description of this application, the character "/" generally indicates that the contextual objects are an "or" relationship.

It can be understood that the various numbers involved in the embodiments of the present application are only for convenience of description, and are not used to limit the scope of the embodiments of the present application. The sequence numbers of the above processes do not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

In the embodiment of the present application, "first", "second" and various numbers indicate distinctions for convenience of description, and are not used to limit the scope of the embodiment of the present application. For example, distinguishing different instruction information and the like.

In the embodiment of the present application, "object to be tested" can also be equivalently replaced with "analyte to be tested" and "analyte", and this application does not specifically limit the specific names thereof.

In this embodiment of the present application, "for indication" may include direct indication and indirect indication. When describing a certain indication information for indicating A, it may include that the indication information directly indicates A or indirectly indicates A, but it does not mean that A must be carried in the indication information.

In addition, specific indication manners may also be various current indication manners, such as but not limited to, the above indication manners and various combinations thereof. For specific details of various indication modes, reference may be made to the current technology, which will not be repeated herein. It can be known from the above that, for example, when multiple pieces of information of the same type need to be indicated, there may be a situation where different information is indicated in different ways. In the specific implementation process, the required indication method can be selected according to the specific needs. The embodiment of the present application does not limit the selected indication method. In this way, the indication method involved in the embodiment of the present application should be understood as covering the There are various methods by which a party can obtain the information to be indicated.

FIG. 2 is a schematic diagram of an example of a remote sensing method 200 applicable to the present application. as shown in picture 2,

S210, the signal end sends the first signal to the sensing end.

Correspondingly, the sensing end receives the first signal from the signal end.

Wherein, the first signal is used to detect the state of the object to be measured.

In the embodiment of the present application, the first signal is a radio frequency detection signal. Wherein, the radio frequency detection signal may be a terahertz signal, a millimeter wave signal, etc., which are not specifically limited in the present application.

Exemplarily, the signal end includes a first antenna, and the sensing end includes a sensor and a third antenna.

In a possible implementation manner, the signal end sends the first signal to the sensing end through the first antenna. Correspondingly, the sensing end receives the first signal from the signal end through the third antenna.

In another possible implementation, the signal end transmits the first signal to the second port of the first circulator through the first port of the first circulator, and sends the first signal to the sensing end through the first antenna, and the first circulator The second port of the device is connected to the first antenna.

In another possible implementation, the sensing end transmits the second signal to the first port of the second circulator through the third port of the second circulator, and receives the first signal from the signal end through the third antenna, and the second circulator The first port of the device is connected to the third antenna.

In another possible implementation, the signal end further includes a first radio frequency switch, for example, a single-pole double-throw radio frequency switch SPDT, and the function of the first radio frequency switch is similar to that of the first circulator in the remote sensing device, so For the process of sending and receiving signals by using the first radio frequency switch, reference may be made to the implementation manner of the first circulator, which will not be repeated here.

It should be noted that the object to be measured can be close to the sensor, or close to the sensor. For example, the distance between the object to be measured and the sensor may be 0.1 m, etc., which is not specifically limited in the present application. The object to be measured can be one of solid, liquid, gas, or non-material existence such as electric field, magnetic field, heat, and gravity.

Optionally, the signal end further includes a signal generator configured to generate the first signal.

It should be noted that the radio frequency signal may be a broadband signal or a narrowband signal.

In the embodiment of the present application, the signal end further includes a device for generating and analyzing radio frequency signals, such as a frequency modulation unit, a spectrum signal analysis unit, a signal processing unit, a spectrum signal synthesis unit, a modulator, and the like.

Specifically, the frequency modulation unit is used to adjust the frequency of the transmitted signal (for example, the first signal), so as to implement frequency scanning in a wider frequency range. The signal processing unit is used to extract and process information such as frequency, phase, and amplitude of the response signal (eg, the second signal), and perform remote state perception of the object to be measured based on this information. The spectral signal synthesis unit is used to synthesize frequency, phase, amplitude and other information of the extracted response signal into a frequency spectrum. The spectral signal analysis unit is used to analyze the frequency spectrum, and then judge the state of the analyte to be measured, and then output the state information of the analyte. It is worth noting that when performing frequency sweeping, a certain amount of synchronization processing is generally required between the signal generator and the signal receiver in order to correctly realize signal extraction. Wherein, the present application does not specifically limit the specific implementation manner of the synchronization processing.

It should be noted that, in the embodiment of the present application, the generated spectrum can be a set of the amplitude or phase or frequency of the received signal corresponding to each frequency point, or it can be the calculated attenuation coefficient or transmission delay of each frequency point etc. are not specifically limited here. Among them, both the magnitude spectrum and the phase spectrum belong to the frequency spectrum of the signal.

It should be noted that, according to different frequency bands of the radio frequency detection signal, the generated spectrum may be a terahertz spectrum, a millimeter wave spectrum, etc., which are not specifically limited here.

S220, the sensing end responds to the first signal based on the state of the object to be measured, so as to acquire a second signal.

Wherein, the object to be measured can be close to the sensor, or the object to be measured can be close to the sensor. For example, the distance between the object to be measured and the sensor may be 0.1 m, etc., which is not specifically limited in the present application.

Exemplarily, the sensor at the sensing end responds to the first signal based on the state of the object to be measured, so as to obtain the second signal.

It should be noted that the object to be measured can be one of solid, liquid, and gas, and can also be non-material existence such as electric field, magnetic field, heat, and gravitational force.

In the embodiment of the present application, the second signal is a radio frequency response signal. Wherein, the radio frequency response signal may be a terahertz signal, a millimeter wave signal, etc., which is not specifically limited in the present application. Wherein, the frequency of the second signal is f ₁ ′.

In this embodiment of the present application, the radio frequency response signal (that is, the second signal) may be a transmission signal. The sensor has the ability to transmit radio frequency signals, and its transmission characteristics will be affected by the state of the object to be measured. The sensing end sends the signal transmitted by the sensor to the signal end.

Exemplarily, the sensor may be a section of bare dielectric fiber (also known as a dielectric waveguide, with structures such as solid fiber, hollow core fiber, microhole fiber, and metal-dielectric composite fiber). For example, when the object to be measured is a solution or a gas, and the composition of the object to be measured changes, its dielectric constant will also change. Since part of the energy of the signal propagates along the surface in the form of evanescent waves when the signal propagates on the dielectric fiber, the change in the dielectric constant of the object to be measured will cause the amplitude change or phase change of all or part of the frequency components of the signal transmitted on the sensor to change. Or, when the sensing section is used for temperature or pressure sensing, its size will change due to thermal expansion and contraction or deformation under pressure, resulting in amplitude changes or phase changes of all or part of the frequency components transmitted on the sensor. Change.

In this embodiment of the present application, the radio frequency response signal (that is, the second signal) may also be a reflection signal. The sensor has the ability to reflect radio frequency signals, and its reflection frequency will be affected by the state of the object to be measured. The sensing end sends the signal reflected by the sensor to the signal end.

Exemplarily, the sensor can be a section of bare dielectric fiber (also known as a dielectric waveguide, with structures such as solid fiber, hollow core fiber, microhole fiber, and metal-dielectric composite fiber), and a metal grid is arranged on its surface. The signal reflection is realized by the Bragg reflection effect of the evanescent wave component of the radio frequency signal propagating on the dielectric fiber on the metal grid. The state of the object to be measured will affect the reflection characteristics of the radio frequency signal, that is, the phase, amplitude, frequency and other information of the signal, which is not specifically limited in this application. For example, when the analyte to be measured is a solution or a gas, if the composition changes, the dielectric constant of the analyte to be measured will also change, and the change in the dielectric constant of the analyte to be measured will cause the frequency reflected on the sensor to change. Or, when the dielectric fiber sensing section is used for temperature or pressure sensing, the metal grid is deformed due to thermal expansion and contraction or compression, which will also cause the frequency reflected on the sensor to change.

In the embodiment of the present application, the sensing end further includes a device for transmitting radio frequency signals, such as a transmission line and the like. Wherein, the transmission line includes a sensor, that is, the transmission and sensing of signals can be in different parts of the same transmission line; or, the transmission line is independent from the sensor, and the transmission line and the sensor are connected by coupling.

In a possible implementation manner, the transmission line may include a sensing section and a transmission section. The perception section is a sensor, which has perception capability (for example, not shielded), can respond to the radio frequency detection signal based on the state of the object to be measured, and generates a radio frequency response signal, and the transmission section can transmit the radio frequency response signal to the transmitting antenna (for example, the first Three antennas) are sent to the signal end.

In another possible implementation, the transmission line can also be entirely composed of sensing segments (for example, sensors). At this time, the sensing segment has the capability of signal perception and transmission, and is directly connected to the transmitting antenna and receiving antenna of the sensing end without additional The transmission section can complete the sending and receiving of the radio frequency detection signal and the radio frequency response signal.

It should be understood that the sensing section is close to or close to the object to be measured, and the transmission of the radio frequency signal on the sensing section will be affected by the state change of the analyte.

S230. The sensing end sends the second signal to the signal end.

Correspondingly, the signal end receives the second signal from the sensing end.

In a possible implementation manner, the sensing end further includes a fourth antenna, and the sensing end sends the second signal to the signal end through the fourth antenna.

In another possible implementation manner, the sensing end sends the second signal to the signal end through the third antenna.

In this implementation manner, the sensing end uses the third antenna, that is, uses the same antenna to transmit and receive signals.

In yet another possible implementation manner, the signal end receives the second signal from the sensing end through the first antenna.

In this implementation manner, the signal end implements signal sending and receiving through the first antenna, that is, using the same antenna.

In yet another possible implementation manner, the signal end receives the second signal from the sensing end that responds to the first signal through the second antenna.

In another possible implementation manner, the sensing end further includes a second circulator, the second circulator includes a first port, a second port, and a third port, the first port of the second circulator is connected to the third antenna, and the second The second port and the third port are respectively connected to both ends of the transmission line, the sensing end transmits the second signal to the first port of the second circulator through the third port of the second circulator, and receives the first signal from the signal end through the third antenna a signal.

Optionally, a first resistor is included between the second port and the third port.

It should be noted that an absorption resistor (for example, a first resistor) is added between the second port and the third port to prevent interference caused by reflected signals from transmission lines or sensors.

In yet another possible implementation, the sensing end further includes a second radio frequency switch, for example, a single-pole double-throw radio frequency switch SPDT, and the second radio frequency switch is similar to the role played by the second circulator in the remote sensing device, so For the process of sending and receiving signals by using the second radio frequency switch, reference may be made to the implementation manner of the second circulator, which will not be repeated here.

It should be understood that the above several possible implementation manners are only illustrative descriptions and shall not constitute any limitation to the technical solution of the present application. In addition, in the above several possible implementations, the devices at the signal end and the sensing end (for example, antennas, circulators, radio frequency switches, etc.) can be used independently or in combination, which is not specifically limited in this application.

S240, the signal terminal acquires the amplitude and/or phase information of the second signal, and the amplitude and/or phase information of the second signal is used to determine the state of the object to be measured.

In this implementation, the signal end senses the state of the object to be measured based on the amplitude and/or phase information of the received radio frequency response signal (ie, the second signal).

Optionally, the signal end can sense the state of the object under test based on the frequency information of the radio frequency response signal. It should be understood that the frequency information of the radio frequency response signal is actually the location of the frequency with the stronger amplitude of the reflected signal.

In the embodiment of the present application, the phase, amplitude, frequency and other information of the radio frequency response signal are equivalent and can be used for state perception of the object to be measured.

Further, the signal end sends a third signal to the sensing end through the first antenna, the third signal is used to detect the state of the object to be measured, the frequency of the third signal is different from the frequency of the first signal; receiving the fourth signal from the sensing end, The fourth signal is determined by the sensor in response to the third signal based on the state of the object to be measured; the phase and/or amplitude information of the fourth signal is extracted, and combined with the phase and/or amplitude information of the second signal to determine the state of the object to be measured.

Exemplarily, the signal end generates and sends N radio frequency detection signals of different frequencies (for example, f ₁ , f ₂ , ..., f _N ) to the receiving end, and the N radio frequency detection signals (for example, signals 1, 2, ..., N) is transmitted to the sensing section (for example, sensor) through the transmission line, and based on the state change of the object to be measured, the sensing section (for example, sensor) responds to N radio frequency detection signals respectively, thereby outputting corresponding N radio frequency response signals (for example, signal 1 ', 2', ..., N'), and sent to the signal end. Assuming that the processing period of each frequency signal is t, after T=N*t, the system completes the signal transmission and reception processing of f ₁ , f ₂ ,..., f _N , and the signal terminal extracts its phase based on the N RF response signals information, amplitude information, and frequency information to generate a spectrum, and analyze the spectrum signal to determine the state of the object to be measured.

It should be noted that the generated spectrum may be a collection of amplitudes, phases, or frequencies of received signals corresponding to each frequency point, or may be an attenuation coefficient or transmission delay of each frequency point obtained after calculation, which is not specifically limited here. Among them, both the magnitude spectrum and the phase spectrum belong to the frequency spectrum of the signal.

It should be noted that the above-mentioned implementation method adopts a frequency sweep mode, that is, the acquisition of a wide frequency range is completed by switching frequency points. For example, the signal end and _the sensing end send and receive detection signals and response signals of N different frequencies (for example, f ₁ , f ₂ , .

FIG. 3 is a schematic diagram of an example of a remote sensing device 300 applicable to an embodiment of the present application. As shown in FIG. 3 , the device includes two parts: a signal end 310 and a sensing end 320 . Next, the structures and functions of the above-mentioned parts will be described in detail respectively.

A. Signal terminal

In the embodiment of the present application, the signal terminal 310 includes a device for generating and analyzing radio frequency signals, for example, a signal generator 311 , a signal receiver 312 , an antenna T1 and an antenna R1 , a frequency modulation unit 313 , and a spectral signal analysis unit 314 .

Optionally, the signal end 310 further includes a signal processing unit, a spectral signal synthesis unit, and the like.

Wherein, the signal generator 311 is used for generating a radio frequency detection signal. The signal receiver 312 is used for receiving a radio frequency response signal.

Exemplarily, the detection waveform is modulated with a terahertz signal by the signal generator 311 . Wherein, the THz signal may be one of a broadband signal, a narrowband signal, a pulse signal, and a continuous wave signal.

Optionally, the signal generator 311 may also modulate the detection waveform to the millimeter wave signal, which is not specifically limited in the present application.

The antenna T1 is used to transmit a radio frequency detection signal to the sensing end, and the antenna R1 is used to receive a radio frequency response signal from the sensing end.

The frequency modulation unit 313 is configured to adjust the frequency of the transmitted signal (for example, the first signal), so as to implement frequency scanning within a wider frequency range.

It should be noted that, when performing frequency scanning, it is generally necessary to perform a certain synchronization process between the signal generator 311 and the signal receiver 312 in order to correctly realize signal extraction. Wherein, the present application does not specifically limit the specific implementation manner of the synchronization processing.

The signal processing unit is used to extract and process information such as the phase and/or amplitude of the response signal (eg, the second signal), and perform remote state perception of the analyte to be measured based on this information.

The spectral signal synthesis unit is used to synthesize the extracted information of the response signal into a frequency spectrum, and the spectral signal analysis unit is used to analyze the frequency spectrum, and then judge the state of the analyte to be measured, and then output the state information of the analyte.

In the embodiment of the present application, the generated spectral signal may be a set of amplitude or phase of the received signal corresponding to each frequency point, or may be an attenuation coefficient or transmission delay of each frequency point obtained after calculation, which is not specifically limited here. .

B. Sensing end

It should be understood that in the embodiment of the present application, the sensing end 320 includes a device for sensing the state of the analyte, including: a sensing fiber, an antenna T2, an antenna R2, and the like.

Among them, the sensing fiber is used for radio frequency signal transmission and state perception. The sensing fiber may include a sensing segment 322 (eg, a sensor) and a transmitting segment 321 . That is, the transmission and perception of signals can be in different parts of the same sensing fiber.

Optionally, the sensing fiber may also be entirely composed of a sensing section (for example, a sensor), and the sensing section has both signal sensing and transmission capabilities, which is not specifically limited in the present application.

It should be noted that the sensing section 322 means that the section of fiber has sensing capabilities (for example, not shielded) while transmitting radio frequency signals, and the transmission section 321 means that the section of fiber only transmits radio frequency signals and does not have the ability of perception (such as ,Hidden).

It should be understood that the sensing section is close to or close to the analyte to be measured, and the transmission of the signal on the sensing section will be affected by the state change of the analyte. For example, the sensing section can be a sensor, which is used to respond to the detection signal (for example, the first signal) based on the state of the object to be measured, so as to obtain a response signal (for example, the second signal), and the response signal is used for signal terminal extraction Spectral information to achieve long-distance perception of the state of the analyte to be measured.

Exemplarily, the sensing fiber can be a dielectric fiber (also known as a dielectric waveguide, with structures such as solid fiber, hollow fiber, microhole fiber, and metal-dielectric composite fiber), and the sensing section can be a section of exposed medium on the sensing fiber. The other part is the transmission section, which is shielded by the cladding. For example, when the analyte to be measured is a solution or gas, if the composition changes, the dielectric constant of the analyte to be measured will also change, and the change in the dielectric constant of the analyte to be measured will cause all or part of the frequency components of the signal to be in the dielectric fiber The amplitude variation or phase variation transmitted on the sensing segment changes. Or, when the dielectric fiber is used for temperature or pressure sensing, the sensing section will be deformed due to thermal expansion and contraction or compression, and its size will change, which will also cause all or part of the frequency components of the signal to be transmitted on the dielectric fiber sensing section The magnitude change or phase change of the change.

The antenna T2 is used to transmit the radio frequency response signal to the signal end, and the antenna R2 is used to receive the radio frequency detection signal from the signal end.

Exemplarily, the two ends of the sensing fiber are respectively connected to the antenna T2 and the antenna R2, so that after the signal sent by the signal end is received by the antenna R2, the analyte is sensed through the sensing section of the sensing fiber, and the sensed signal is transmitted through the The segment is transmitted to the antenna T2 and returned to the signal end by the antenna T2.

It should be noted that, in the foregoing implementation manner, the sensing end is passive. That is to say, the sensing end can work without power supply.

Optionally, in the above implementation manner, a signal amplifying device may also be added at the sensing end to achieve a longer distance between the sensing end and the signal end. It should be understood that, in this implementation manner, the sensing end may be active, which is not specifically limited in the present application.

FIG. 4 is a schematic diagram of an example of a remote sensing method 400 applicable to the present application. As shown in Figure 4, the specific implementation steps include:

S410, the signal end generates a signal 1 (for example, a first signal).

Wherein, the center frequency of signal 1 is f ₁ .

Exemplarily, the signal end generates a signal 1 with a center frequency f ₁ through a frequency modulation unit and a signal generator.

S420, the signal end sends signal 1 to the sensing end through the antenna T1 (for example, the first antenna).

Correspondingly, the sensing end receives the signal 1 from the signal end through the antenna R2 (for example, the third antenna).

Among them, signal 1 is used to detect the state of the analyte to be detected. The analyte to be measured can be one of solid, liquid, gas, or non-material existence such as electric field, magnetic field, heat, and gravitational force.

S430, the sensing end converts the signal 1 into the sensing fiber, and responds to the signal 1 based on the state of the analyte to be measured, so as to obtain the signal 1' (for example, the second signal).

Wherein, the sensing fiber includes a transmission section and a sensing section (for example, a sensor), and the sensing section is close to or close to the analyte to be measured.

Exemplarily, the signal 1 is transmitted to the sensing section through the sensing fiber, and is affected by the analyte, causing the state of the signal 1 to change, and the sensing section responds to the signal 1 to obtain a signal 1'.

S440, the sensing end sends a signal 1' to the signal end through the antenna T2 (for example, the fourth antenna).

Correspondingly, the signal end receives the signal 1' from the sensing end through the antenna R1 (for example, the second antenna).

Exemplarily, the sensing end transmits the signal 1' to the antenna T2 through the sensing fiber, and returns to the signal end through the antenna T2.

S450, the signal terminal extracts information such as the amplitude and phase of the signal 1'.

Exemplarily, the signal terminal extracts and processes information such as amplitude and phase from the signal 1' through the signal processing unit.

S460, after the t time period, the signal terminal generates a signal 2 with a center frequency _f2 through the frequency modulation unit and the signal generator, and repeats the above steps S410-S450 to obtain information such as the amplitude and phase of the signal 2'.

Wherein, it is assumed that the processing period of each frequency signal is t, t is a constant greater than 0, and the frequency _f2 is different from the frequency _f1 .

S470, after the T=N*t time period, the system completes the signal transmission and reception processing of N different frequencies (for example, f ₁ , f ₂ , ..., f _N ), the signal terminal generates a spectrum, and performs spectrum signal analysis To determine the state of the analyte being measured.

It should be understood that the technical solution of the present application may not use the frequency sweep mode, that is, the signal end directly sends a broadband radio frequency signal, and receives and analyzes a corresponding signal. For example, the signal end and the sensing end send and receive broadband probe signals and response signals, where N different frequency (eg, f ₁ , f ₂ , ..., f _N ) probe signal components are extracted within the frequency range of the broadband signal and response signal components to generate a spectrum to realize the remote perception of the state of the object to be measured.

It should be understood that the technical solution of the present application can also send and receive multiple broadband signals in a frequency sweep mode, that is, complete the collection of multiple broadband signals by switching frequency points. For example, the signal end and the sensing end transmit and receive broadband signals of n sub-bands (for example, band ₁ , band ₂ , ..., band _n ), and extract N different frequencies (for example, f ₁ , f ₂ , ..., f _N ) detection signal and response signal generate a spectrum to realize the remote perception of the state of the object to be measured. Wherein, n is less than or equal to N.

FIG. 5 is a schematic diagram of another example of a remote sensing device 500 applicable to an embodiment of the present application. The difference from the device shown in FIG. 3 is that the device in FIG. 3 is at the sensing end, and signal transmission and sensing are on the same transmission line (ie, sensing fiber). However, the sensor 522 of the device in FIG. 5 is independent from the transmission line 521, and the transmission line and the sensor are connected through a coupling structure. As shown in FIG. 5 , the device includes two parts: a signal end 510 and a sensing end 520 . Next, the structures and functions of the above-mentioned parts will be described in detail respectively.

A. Signal terminal

In this embodiment of the application, the signal terminal 510 includes devices for generating and analyzing radio frequency signals, for example, a signal generator 511, a signal receiver 512, an antenna T1 and an antenna R1, a frequency modulation unit 513, and a spectrum signal analysis unit 514, etc.

Optionally, the signal end 510 further includes a spectral signal synthesis unit, a signal processing unit, and the like.

Wherein, the signal generator 511 is used for generating a radio frequency detection signal. The signal receiver 512 is used for receiving a radio frequency response signal.

Exemplarily, the detection waveform is modulated to a terahertz signal by the signal generator 511 . Wherein, the THz signal may be one of a broadband signal, a narrowband signal, a pulse signal, and a continuous wave signal.

Optionally, the signal generator 511 may also modulate the detection waveform to the millimeter wave signal, which is not specifically limited in the present application.

The frequency modulation unit 513 is configured to adjust the frequency of the transmitted signal (for example, the first signal), so as to implement frequency scanning within a wider frequency range.

It should be noted that, when performing frequency scanning, it is generally necessary to perform a certain synchronization process in the signal generator 511 and the signal receiver 512 in order to correctly realize signal extraction. Wherein, the present application does not specifically limit the specific implementation manner of the synchronization processing.

The spectral signal synthesis unit is used to synthesize the extracted information of the response signal into a spectrum, and the spectral signal analysis unit 514 is used to analyze the frequency spectrum, and then judge the state of the analyte under test, and then output the state information of the analyte.

In the embodiment of the present application, the generated spectral signal can be a set of the amplitude or phase of the received signal corresponding to each frequency point, or it can be the attenuation coefficient or transmission delay of each frequency point obtained after calculation, which is not specifically limited here. .

B. Sensing end

It should be understood that in this embodiment of the present application, the sensing end 520 includes devices for sensing the state of the analyte, including: transmission lines, antennas T2 and R2, sensors, and the like.

Wherein, the transmission line 521 is used for sending and receiving radio frequency signals, and the sensor 522 is used for sensing the state of the analyte. It should be noted that the sensor 522 can also transmit radio frequency signals while possessing sensing capabilities. The transmission line 521 and the sensor 522 are connected together through a coupling structure.

It should be understood that the sensor 522 is close to or close to the analyte to be measured, and the transmission of the signal on the sensing section will be affected by the state change of the analyte.

Exemplarily, the sensor 522 may be a section of bare dielectric fiber, the transmission line 521 may be a section of dielectric fiber with a shielding cladding, and the sensor 522 is connected to the transmission line 521 through a coupling structure. The sensor 522 can also transmit radio frequency signals while having sensing capabilities. For example, when the analyte to be measured is a solution or a gas, if the composition changes, the dielectric constant of the analyte to be measured will also change, and the change in the dielectric constant of the analyte to be measured will cause all or part of the frequency components of the signal to pass through the sensor. The amplitude variation or phase variation of the upper transmission changes. Or, when used for temperature or pressure sensing, the sensor will be deformed due to thermal expansion and contraction reaction or pressure, and its size will change, which will also cause amplitude changes or phase changes of all or part of the frequency components of the signal transmitted on the sensor changes happened.

Exemplarily, the two ends of the sensor are respectively connected to the antenna T2 and the antenna R2 through the transmission line, so that after the signal sent by the signal end is received by the antenna R2, the analyte is sensed by the sensor, and the sensed signal is transmitted to the antenna T2 through the transmission line, And return to the signal end by the antenna T2.

In the embodiment of the present application, the transmission line and the sensor are connected through a coupling structure, which can be made into a pluggable structure, which is convenient for implementation in some scenarios.

FIG. 6 is a schematic diagram of an example of a remote sensing method 600 applicable to the present application. As shown in Figure 6, the specific implementation steps include:

S610, the signal end generates a signal 1 (for example, a first signal).

Wherein, the center frequency of signal 1 is f ₁ .

S620, the signal end sends signal 1 to the sensing end through the antenna T1 (for example, the first antenna).

Among them, signal 1 is used to detect the state of the analyte to be detected. The analyte to be measured can be at least one of solid, liquid, and gas, and can also be non-material existence such as electric field, magnetic field, heat, and gravitational force.

S630, the sensing end converts the signal 1 into the transmission line through the antenna R2, and transmits it to the sensor through the transmission line, and the sensor responds to the signal 1 based on the state of the analyte to be measured to obtain the signal 1' (for example, the second signal).

Among them, the sensor is independent from the transmission line, and the two are connected through a coupling structure. The sensor is attached to or close to the analyte to be measured.

Exemplarily, the signal 1 is transmitted to the sensor through the transmission line, and is affected by the analyte, so that the state of the signal 1 changes, and the sensor responds to the signal 1 to obtain a signal 1'.

S640. The sensing end sends a signal 1' to the signal end through the antenna T2 (for example, the fourth antenna).

Exemplarily, the sensing end transmits the signal 1' to the antenna T2 through the transmission line, and returns to the signal end through the antenna T2.

S650, the signal terminal extracts information such as the amplitude and phase of the signal 1'.

S660, after the t time period, the signal terminal generates a signal 2 with a center frequency _f2 through the frequency modulation unit and the signal generator, and repeats the above steps S610-S650 to obtain information such as the amplitude and phase of the signal 2'.

S670, after the T=N*t time period, the system completes the signal transmission and reception processing of N different frequencies (for example, f ₁ , f ₂ , ..., f _N ), the signal terminal generates a spectrum, and performs spectrum signal analysis , to determine the state of the analyte being measured.

It should be understood that the technical solution of the present application may not use the frequency sweep mode, that is, the signal end directly sends a broadband radio frequency signal, and receives and analyzes a corresponding signal. For example, the signal end and the sensing end send and receive broadband probe signals and response signals, where N different frequency (eg, f ₁ , f ₂ , ..., f _N ) probe signal components are extracted within the frequency range of the broadband signal And the response signal components to realize the remote perception of the state of the object to be measured.

It should be understood that the technical solution of the present application can also send and receive multiple broadband signals in a frequency sweep mode, that is, complete the collection of multiple broadband signals by switching frequency points. For example, the signal end and the sensing end transmit and receive broadband signals of n sub-bands (for example, band ₁ , band ₂ , ..., band _n ), and extract N different frequencies (for example, f ₁ , f ₂ , ..., f _N ) detection signal and response signal to realize the remote perception of the state of the object to be measured. Wherein, n is less than or equal to N.

FIG. 7 is a schematic diagram of another example of a remote sensing device 700 applicable to an embodiment of the present application. The difference from the device shown in Figure 3 is that the device in Figure 3 uses independent transceiver antennas, while the device in Figure 7 is implemented with high-isolation circulators (for example, circulator 1 and circulator 2) Shared transmit and receive antennas. As shown in FIG. 7 , the device includes two parts: a signal end 710 and a sensing end 720 . Next, the structures and functions of the above-mentioned parts will be described in detail respectively.

A. Signal terminal

In the embodiment of the present application, the signal terminal 710 includes devices for generating and analyzing radio frequency signals, for example, a signal generator 711, a signal receiver 712, a frequency modulation unit 713, a spectrum signal analysis unit 716, a signal processing unit 714, a spectrum signal Combining unit 715, a three-port circulator device (ie, circulator 1), and the like.

Wherein, the signal generator 711 is used for generating a radio frequency detection signal. The signal receiver 712 is used for receiving a radio frequency response signal.

Exemplarily, the detection waveform is modulated to a terahertz signal by the signal generator 711 . Wherein, the THz signal may be one of a broadband signal, a narrowband signal, a pulse signal, and a continuous wave signal.

Optionally, the signal generator 711 may also modulate the detection waveform to the millimeter wave signal, which is not specifically limited in the present application.

The transceiver circuit is respectively connected to two ports of the three-port circulator device (ie, circulator 1 ), and the antenna 1 is connected to the other port.

The antenna 1 is used to transmit a radio frequency detection signal to the signal end, or to receive a radio frequency response signal from the signal end.

The frequency modulation unit 713 is configured to adjust the frequency of the transmitted signal (for example, the first signal), so as to implement frequency scanning within a wider frequency range.

It should be noted that, when scanning, it is generally necessary to perform a certain synchronization process between the signal generator 711 and the signal receiver 712 in order to correctly realize signal extraction. Wherein, the present application does not specifically limit the specific implementation manner of the synchronization processing.

The signal processing unit 714 is used to extract and process information such as the phase and/or amplitude of the response signal (eg, the second signal), and perform remote state perception of the analyte to be measured based on this information.

The spectral signal synthesis unit 715 is used to synthesize the extracted information of the response signal into a frequency spectrum, and the spectral signal analysis unit 716 is used to analyze the frequency spectrum, and then judge the state of the analyte under test, and then output the state information of the analyte.

It should be noted that, in the embodiment of the present application, the generated spectrum may be a collection of the amplitude or phase of the received signal corresponding to each frequency point, or the attenuation coefficient or transmission delay of each frequency point obtained after calculation, etc. No specific limitation is made here. Among them, both the magnitude spectrum and the phase spectrum belong to the frequency spectrum of the signal.

B. Sensing end

It should be understood that in the embodiment of the present application, the sensing end 720 includes a device for sensing the state of the analyte, for example, a sensing fiber (that is, a type of transmission line), a three-port circulator device (that is, a circulator 2) wait.

Wherein, the antenna 2 is connected to one port of the three-port circulator device, and the other two ports are respectively connected to two ends of the sensing fiber.

It should be noted that an absorption resistor is added between the two ports connected to the sensing fiber to prevent the sensing fiber (sensing section) from responding to the sensing end after being transmitted by the circulator due to the strong reflection signal formed by the sensing fiber (sensing section). signal interference.

In addition, the sensing fiber is a transmission line for the transmission and sensing of radio frequency detection signals. It may include a sensing segment 722 (eg, a sensor) and a transmitting segment 721 .

It should be noted that the sensing segment means that the segment of fiber has the ability to sense while transmitting radio frequency signals (for example, is not shielded), and the transmission segment refers to that the segment of fiber only transmits radio frequency signals and does not have the ability to sense the outside world (for example, Hidden).

The transmission and perception of signals can be in different parts of the same transmission line, or independent transmission lines can be connected together through a coupling structure.

Optionally, the sensing fiber may also be entirely composed of the sensing segment 722 (for example, a sensor). At this time, the sensing segment has the capability of signal sensing and transmission, which is not specifically limited in the present application.

Exemplarily, the sensing fiber may be a dielectric fiber, and the sensing segment may be a bare part. For example, when the analyte to be measured is a solution or a gas, if the composition changes, the dielectric constant of the analyte to be measured will also change, and the change in the dielectric constant of the analyte to be measured will cause all or part of the frequency components of the signal to be in the medium The amplitude change or phase change transmitted on the fiber sensing segment changes. Or, when the sensing section of the dielectric fiber is used for temperature or pressure sensing, the sensing section is deformed due to thermal expansion and contraction or compression, and the size of the sensing section of the dielectric fiber will change at this time, which will also cause all or part of the frequency of the signal to change. The amplitude change or phase change of the component transmitted on the sensing section of the dielectric fiber changes.

The antenna 2 is used for transmitting radio frequency response signals to the signal end, or for receiving radio frequency detection signals from the signal end.

Exemplarily, the sensing end uses a circulator to share the transmitting and receiving antennas.

FIG. 8 is a schematic diagram of an example of a remote sensing method 800 applicable to the present application. As shown in Figure 8, the specific implementation steps include:

S810, the signal end generates a signal 1 (for example, a first signal).

Wherein, the center frequency of signal 1 is f ₁ .

S820, the signal end sends the signal 1 to the sensing end through the first port of the circulator 1 and the second port (antenna 1) of the circulator 1.

Correspondingly, the sensing end receives the signal 1 from the signal end through the first port (antenna 2 ) of the circulator 2 .

S830, the sensing end converts the signal 1 into the sensing fiber through the second port of the circulator 2 (the end connected to the sensing fiber), and transmits it to the sensing section, and the sensing section responds to the signal 1 based on the state of the analyte to be measured , to obtain signal 1' (eg, the second signal).

Exemplarily, the signal 1 is transmitted to the sensing section through the sensing fiber, and is affected by the analyte, so that the state of the signal 1 changes, and the sensor responds to the signal 1 to obtain a signal 1'.

S840, the sensing end sends a signal 1' to the signal end through the third port of the circulator 2 (connected to the other end of the sensing fiber) and the first port of the circulator 2 (antenna 2).

Correspondingly, the signal end successively receives the signal 1' from the sensing end through the second port of the circulator 1 (antenna 1) and the third port of the circulator 1.

Exemplarily, the sensing end transmits the signal 1' to the third port of the circulator 2 (connected to the other end of the sensing fiber) through the sensing fiber, and returns to the signal end through the first port of the circulator 2 (antenna 1).

S850, the signal terminal extracts information such as the amplitude and phase of the signal 1'.

Exemplarily, the signal receiver receives the signal 1' from the third port (the transceiver circuit) of the circulator 1, and extracts and processes information such as amplitude and phase from the signal 1' through the signal processing unit.

S860, after the t time period, the signal terminal generates a signal 2 with a center frequency of _f2 through the frequency modulation unit and the signal generator, and repeats the above steps S810-S850 to obtain information such as the amplitude and phase of the signal 2'.

S870, after the T=N*t time period, the system completes the signal transmission and reception processing of N different frequencies (for example, f ₁ , f ₂ , ..., f _N ), and the signal end generates a spectrum through the spectrum signal synthesis unit, Spectral signal analysis is performed to determine the state of the analyte to be measured.

FIG. 9 is a schematic diagram of another example of a remote sensing device 900 applicable to an embodiment of the present application. The difference from the device shown in Fig. 3 is that the device in Fig. 3 utilizes the effect of the state of the analyte on the radio frequency signal transmission (dispersion, attenuation, etc.). However, the device in FIG. 9 uses the influence of the state of the analyte on the frequency of the reflected signal of the sensor to perceive the state of the object to be measured. As shown in FIG. 9 , the device includes two parts: a signal end 910 and a sensing end 920 . Next, the structures and functions of the above-mentioned parts will be described in detail respectively.

A. Signal terminal

In the embodiment of the present application, the signal terminal 910 includes devices for generating and analyzing radio frequency signals, such as: signal generator 911, signal receiver 912, frequency modulation unit 913, spectrum signal analysis unit 916, signal processing unit 914, spectrum signal Combining unit 915, antenna T1, antenna R1 and so on.

Wherein, the signal generator 911 is used for generating a radio frequency detection signal. The signal receiver 912 is used for receiving a radio frequency response signal.

Exemplarily, the detection waveform is modulated to a terahertz signal by the signal generator 911 . Wherein, the THz signal may be one of a broadband signal, a narrowband signal, a pulse signal, and a continuous wave signal.

Optionally, the signal generator 911 may also modulate the detection waveform to the millimeter wave signal, which is not specifically limited in the present application.

The signal processing unit 914 is used to extract and process information such as the phase and/or amplitude of the response signal (eg, the second signal), and perform remote state perception of the analyte to be measured based on this information.

The frequency modulation unit 913 is configured to adjust the frequency of the transmitted signal (for example, the first signal), so as to implement frequency scanning within a wider frequency range.

It should be noted that, when performing frequency scanning, a certain synchronization process usually needs to be performed between the signal generator 911 and the signal receiver 912 in order to correctly realize signal extraction. Wherein, the present application does not specifically limit the specific implementation manner of the synchronization processing.

The spectral signal synthesis unit 915 is used to synthesize the extracted information of the response signal into a spectrum, and the spectral signal analysis unit 916 is used to analyze the frequency spectrum, and then judge the state of the analyte under test, and then output the state information of the analyte.

B. Sensing end

It should be understood that in the embodiment of the present application, the sensing end 920 includes devices for sensing the state of the analyte, for example, a sensing fiber, antenna T2, antenna R2, a three-port circulator device, and the like.

Among them, the sensing fiber is a kind of transmission line, which is used for the transmission of radio frequency signals and state perception. A sensing fiber may include a sensing segment (eg, a sensor) and a transmitting segment. That is, the transmission and perception of signals can be in different parts of the same sensing fiber.

It should be noted that the sensing section means that the fiber section has sensing capabilities (for example, is not shielded), and the transmission section means that the fiber section only transmits radio frequency signals and does not have sensing capabilities (for example, is shielded).

Optionally, the sensing fiber may also be entirely composed of a sensing segment (eg, a sensor), and the sensing segment has a signal sensing capability, which is not specifically limited in the present application.

Exemplarily, the sensing fiber can be a dielectric fiber (also known as a dielectric waveguide, which has a structure such as a solid fiber, a hollow fiber, a microhole fiber, a metal-dielectric composite fiber), and is used for transmitting and receiving THz signals or millimeter wave signals. . Wherein, the dielectric fiber may include a sensing section and a transmission section. Its transmission section is shielded by the cladding, only transmits radio frequency signals, and does not have the ability to perceive. The sensing section can be a section of bare dielectric fiber on the transmission line, and a metal grid is set on the surface of the sensing section, which has sensing ability and constitutes a sensor. Since a part of the energy of the signal propagates along the surface in the form of evanescent waves when the signal propagates on the dielectric fiber, due to the Bragg reflection effect, part of the signal will be reflected when passing through the metal grid, and the state of the object to be measured will affect the reflection of the RF signal Characteristics, that is, information such as phase, amplitude, and frequency of the signal, which is not specifically limited in the present application. For example, when the analyte to be measured is a solution or a gas, if the composition changes, the dielectric constant of the analyte to be measured will also change, and the change in the dielectric constant of the analyte to be measured will cause the frequency of the reflected signal of the sensor to change. Or, when used for temperature or pressure sensing, the metal grid is deformed due to thermal expansion and contraction or compression, which will also cause the frequency of the sensor's reflected signal to change.

The three-port circulator device includes two antenna ports, which are respectively connected to the antenna R2 and the antenna T2, and the third port is connected to the transmission line.

Exemplarily, the sensing end receives the radio frequency detection signal through the antenna R2, and transmits it to the transmission line through the third port of the three-port circulator, and the sensing portion responds to the radio frequency detection signal based on the state of the analyte to obtain a radio frequency response The signal is transmitted to the signal terminal through the antenna T2.

Optionally, the technical solution of the present application is applicable to setting multiple sensing segments (for example, sensor 1, sensor 2, ..., sensor n) on one fiber to sense the state of multiple analytes. When the signal propagates on the dielectric fiber, there is still a part of energy propagating in the fiber core, which will not be completely reflected by the sensing segment, so it can be transmitted to the next sensing segment through the transmission segment for status sensing. In this case, due to the different positions of different sensing segments on the sensing fiber, the signal end can distinguish the reflected signals corresponding to different analytes through the time delay of the reflected signals, and identify the states of different analytes.

FIG. 10 is a schematic diagram of an example of a remote sensing method 1000 applicable to the present application. As shown in Figure 10, the specific implementation steps include:

S1010, the signal terminal generates a signal 1 (for example, a first signal).

Wherein, the center frequency of signal 1 is f ₁ .

S1020, the signal end sends a signal 1 to the sensing end through the antenna T1 (for example, the first antenna).

S1030, the sensing end converts the signal 1 to the sensing fiber through the third port of the three-port circulator, and the sensing portion responds to the signal 1 based on the state of the analyte to be measured, so as to obtain the signal 1' (for example, the second signal).

Among them, the sensing fiber is a kind of transmission line, which is used for the transmission and state perception of radio frequency signals, including a transmission section and a sensing section (for example, a sensor), the sensing section is close to or close to the analyte to be measured, and the signal is transmitted on the sensing section Can be affected by changes in the state of the analyte.

S1040, the sensing end sends a signal 1' to the signal end through the antenna T2 (for example, the fourth antenna).

Then, based on the state response signal 1 of the analyte to be measured, the sensing end obtains the reflected signal 1', which is transmitted to the signal end through the third port of the three-port circulator and the antenna T2.

S1050, the signal terminal extracts information such as the amplitude and phase of the signal 1'.

S1060, after the t time period, the signal terminal generates a signal 2 with a center frequency of _f2 through the frequency modulation unit and the signal generator, and repeats the above steps S1010-S1050 to obtain information such as the amplitude and phase of the signal 2'.

S1070, after the T=N*t time period, the system completes the signal transmission and reception processing of N different frequencies (for example, f ₁ , f ₂ , ..., f _N ), and the signal end generates a spectrum through the spectrum signal synthesis unit 915 , and perform spectral signal analysis to determine the state of the analyte being measured.

It should be noted that in the embodiment of the present application, the generated spectrum may be a collection of the amplitude or phase of the received signal corresponding to each frequency point, or may be the attenuation coefficient or transmission delay of each frequency point obtained after calculation, No specific limitation is made here. Among them, both the magnitude spectrum and the phase spectrum belong to the frequency spectrum of the signal.

Optionally, the technical solution of the present application may not use the frequency sweep mode, that is, the signal end directly sends a wide-band radio frequency signal, and receives and analyzes a corresponding signal. For example, the signal end and the sensing end send and receive broadband probe signals and response signals, where N different frequency (eg, f ₁ , f ₂ , ..., f _N ) probe signal components are extracted within the frequency range of the broadband signal And the response signal components to realize the remote perception of the state of the object to be measured.

Optionally, the technical solution of the present application may also receive multiple broadband signals in a frequency sweep mode, that is, complete the collection of multiple broadband signals by switching frequency points. For example, the signal end and the sensing end transmit and receive broadband signals of n sub-bands (for example, band ₁ , band ₂ , ..., band _n ), and extract N different frequencies (for example, f ₁ , f ₂ , ..., f _N ) detection signal and response signal to realize the remote perception of the state of the object to be measured. Wherein, n is less than or equal to N.

Optionally, the technical solution of the present application is applicable to setting multiple sensing sections (for example, sensor 1, sensor 2, ..., sensor n) on one fiber to sense the state of multiple analytes. When the signal propagates on the dielectric fiber, there is still a part of energy propagating in the fiber core, which will not be completely reflected by the sensing segment, so it can be transmitted to the next sensing segment through the transmission segment for status sensing. In this case, due to the different positions of different sensing segments on the sensing fiber, the signal end can distinguish the reflected signals corresponding to different analytes through the time delay of the reflected signals, and identify the states of different analytes.

To sum up, the technical solution of the present application combines wireless communication and media fiber sensing capabilities to achieve long-distance sensing. The remote sensing method provided by this application is easy to deploy and has low cost. The connection between the signal end and the sensing end can be realized through a THz antenna or a millimeter-wave antenna, without the need to pull wires between the signal end and the sensing end, and the sensing ability of the dielectric fiber is used to realize the state perception of the analyte, and the sensing end can even be passive.

It should be understood that the several implementation manners provided above can be implemented independently or used in combination, which is not specifically limited in the present application. For example, antenna T1 and antenna R1 in Fig. 9 can be replaced by the scheme of circulator and antenna 1 in Fig. 7 to realize sharing of transmitting and receiving antennas; 3. The dual-antenna solution in Figure 5 (i.e., antenna T2 and antenna R2) transmits and receives signals; for another example, the analytes in Figure 3, Figure 5 and Figure 7 may include multiple, etc., and this application does not specifically limit this .

It should be noted that, the several implementation manners provided above are only illustrative descriptions, and shall not constitute any limitation to the technical solution of the present application.

The method-side embodiment of the long-distance sensing of the present application is described in detail above with reference to FIG. 1 to FIG. 10 , and the device-side embodiment of the long-distance sensing of the present application will be described in detail below in conjunction with FIG. 11 and FIG. 12 . It should be understood that the descriptions of the device embodiments correspond to the descriptions of the method embodiments, therefore, for parts that are not described in detail, reference may be made to the foregoing method embodiments.

Fig. 11 is a schematic block diagram of a remote sensing device provided by an embodiment of the present application. As shown in FIG. 11 , the apparatus 1000 may include a processing unit 1100 and a transceiver unit 1200 .

Optionally, the remote sensing device 1000 may correspond to the signal terminal in the above method embodiments, for example, may be a signal terminal, or a component (such as a circuit, a chip, or a chip system, etc.) configured in the signal terminal.

Exemplarily, the transceiver unit 1200 is used for the signal end to send a first signal to the sensing end, and the first signal is used to detect the state of the object to be measured;

The transceiver unit 1200 is also used for the signal end to receive a second signal from the sensing end in response to the first signal, and the second signal is determined based on the state of the object to be measured;

The processing unit 1100 is used for the signal end to obtain phase and/or amplitude information of the second signal, and the phase and/or amplitude information of the second signal is used to determine the state of the object to be measured.

Optionally, the transceiver unit 1200 is further configured to send a third signal to the sensing end, the third signal is used to detect the state of the object to be measured, and the frequency of the third signal is different from the frequency of the first signal;

The transceiver unit 1200 is further configured to receive a fourth signal from the sensing end in response to the third signal, where the fourth signal is determined based on the state of the object to be measured;

The processing unit 1100 is further configured to acquire phase and/or amplitude information of the fourth signal, and the phase and/or amplitude information of the fourth signal is used in combination with the phase and/or amplitude information of the second signal to determine the state of the object to be measured.

It should be understood that the remote sensing device 1000 may correspond to the signal end in the method 200, method 400, method 600, method 800, and method 1000 according to the embodiment of the present application, and the remote sensing device 1000 may include a The unit of the method performed by the signal end in the method 200 in the method 200 in FIG. 4 or the method 400 in FIG. 4 or the method 600 in FIG. 6 or the method 800 in FIG. 8 or the method 200 in the method 1000 in FIG. 10 . In addition, each unit in the remote sensing device 1000 and other operations and/or functions described above are respectively intended to implement the method 200 in FIG. 2 or the method 400 in FIG. 4 or the method 600 in FIG. 6 or the method 800 in FIG. 8 Or the corresponding flow of the method 1000 in FIG. 10 .

It should also be understood that when the remote sensing device 1000 is a signal end, the transceiver unit 1200 in the remote sensing device 1000 can be realized by a transceiver, for example, it can correspond to the transceiver in the remote sensing device 2000 shown in FIG. 12 The processor 2020, the processing unit 1100 in the remote sensing device 1000 may be implemented by at least one processor, for example, may correspond to the processor 2010 in the remote sensing device 2000 shown in FIG. 12 .

It should also be understood that when the remote sensing device 1000 is a chip or chip system configured in the signal terminal, the transceiver unit 1200 in the remote sensing device 1000 can be realized through an input/output interface, a circuit, etc., and the remote sensing device The processing unit 1100 in 1000 may be realized by a processor, a microprocessor, or an integrated circuit integrated on the chip or the chip system.

Optionally, the remote sensing device 1000 may correspond to the sensing end in the above method embodiments, for example, may be a sensing end, or a component (such as a circuit, a chip, or a chip system, etc.) configured in the sensing end.

Exemplarily, the transceiver unit 1200 is used for the sensing end to receive a first signal from the signal end, and the first signal is used to detect the state of the object to be measured;

The processing unit 1100 is used for the sensing end to respond to the first signal based on the state of the object to be measured, so as to obtain the second signal;

The transceiver unit 1200 is further configured for the sensing end to send the second signal to the signal end.

Optionally, the transceiver unit 1200 is also used for the sensing end to receive a third signal from the signal end, the third signal is used to detect the state of the object to be measured, and the frequency of the third signal is different from the frequency of the first signal;

The processing unit 1100 is further configured for the sensing end to respond to the third signal based on the state of the object to be measured, so as to obtain a fourth signal;

The transceiver unit 1200 is further configured for the sensing end to send the fourth signal to the signal end.

It should be understood that the remote sensing device 1000 may correspond to the sensing end in the method 200, method 400, method 600, method 800, and method 1000 according to the embodiment of the present application, and the remote sensing device 1000 may include the The unit of the method executed by the sensing end in the method 200 in FIG. 4 or the method 400 in FIG. 4 or the method 600 in FIG. 6 or the method 800 in FIG. 8 or the method 1000 in FIG. 10 . In addition, each unit in the remote sensing device 1000 and other operations and/or functions described above are respectively intended to implement the method 200 in FIG. 2 or the method 400 in FIG. 4 or the method 600 in FIG. 6 or the method 800 in FIG. 8 Or the corresponding flow of the method 1000 in FIG. 10 .

It should also be understood that when the remote sensing device 1000 is the sensing end, the transceiver unit 1200 in the remote sensing device 1000 can be implemented by a transceiver, for example, it can correspond to the transceiver in the remote sensing device 2000 shown in FIG. 12 The processor 2020, the processing unit 1100 in the remote sensing device 1000 may be implemented by at least one processor, for example, may correspond to the processor 2010 in the remote sensing device 2000 shown in FIG. 12 .

It should also be understood that when the remote sensing device 1000 is a chip or a chip system configured in the sensing end, the transceiver unit 1200 in the remote sensing device 1000 can be realized through an input/output interface, a circuit, etc., and the remote sensing device The processing unit 1100 in 1000 may be realized by a processor, a microprocessor, or an integrated circuit integrated on the chip or the chip system.

Fig. 12 is a schematic diagram of another example of the device for remote sensing provided by the embodiment of the present application. As shown in FIG. 12 , the device 2000 includes a processor 2010 , a transmitter 2020 , a receiver 2040 and a memory 2030 . Wherein, the processor 2010, the transmitter 2020, the receiver 2040 and the memory 2030 communicate with each other through an internal connection path, the memory 2030 is used to store instructions, and the processor 2010 is used to execute the instructions stored in the memory 2030 to control the transmitter 2020 transmits the signal and receiver 2040 receives the signal.

It should be understood that the remote sensing device 2000 may correspond to the signal end or the sensing end in the above method embodiments, and may be used to execute various steps and/or processes performed by the signal end or the sensing end in the above method embodiments.

Optionally, the memory 2030 may include read-only memory and random-access memory, and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. The memory 2030 may be an independent device, or may be integrated in the processor 2010 . The processor 2010 can be used to execute the instructions stored in the memory 2030, and when the processor 2010 executes the instructions stored in the memory, the processor 2010 can be used to execute each of the above-mentioned method embodiments corresponding to the signal end or the sensing end. steps and/or processes.

Optionally, the remote sensing device 2000 is the signal end or sensing end in the foregoing embodiments.

Wherein, the transmitter 2020 may include a transmitter, and the receiver 2040 may include a receiver. The processor 2010 and memory 2030 and the transmitter 2020 and receiver 2040 may be devices integrated on different chips. For example, the processor 2010 and the memory 2030 may be integrated in a baseband chip, and the transmitter 2020 and receiver 2040 may be integrated in a radio frequency chip. The processor 2010, the memory 2030, the transmitter 2020 and the receiver 2040 may also be devices integrated on the same chip. This application is not limited to this.

Optionally, the remote sensing device 2000 is a component configured on the signal end or the sensing end, such as a circuit, a chip, a chip system, and the like.

Wherein, the transmitter 2020 and the receiver 2040 may also be communication interfaces, such as input/output interfaces, circuits, and the like. Both the transmitter 2020 and the receiver 2040, the processor 2010 and the memory 2030 may be integrated in the same chip, such as integrated in a baseband chip.

It should be understood that the specific examples in the embodiments of the present application are only to help those skilled in the art better understand the technical solutions of the present application. example range.

It should be noted that the actions or methods executed by the controller may be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented using software, the actions or methods performed by the controller may be fully or partially implemented in the form of computer program products. The computer program product comprises one or more computer instructions or computer programs. When the computer instruction or computer program is loaded or executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center that includes one or more sets of available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, or a magnetic tape), an optical medium (for example, a digital video disc (DVD)), or a semiconductor medium, and the semiconductor medium may be a solid-state hard disk.

Optionally, the memory and the processor in the foregoing apparatus embodiments may be physically independent units, or the memory and the processor may also be integrated together, which is not limited in the present application.

The processor in this embodiment of the present application may be an integrated circuit chip capable of processing signals. In the implementation process, each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable Logic devices, discrete gate or transistor logic devices, discrete hardware components. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the methods disclosed in the embodiments of the present application may be directly implemented by a hardware coded processor, or executed by a combination of hardware and software modules in the coded processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

The memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM ) and direct memory bus random access memory (direct rambus RAM, DRRAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence or the part that contributes to the current technology or the technical solution. The computer software product is stored in a storage medium, including several The instructions are used to make a computer device (which may be a personal computer, a server, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, and other media capable of storing program codes.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims

A method for remote sensing, characterized in that it is applied to a sensing system, the sensing system includes a signal end and a sensing end, and the method includes:

The signal end sends a first signal to the sensing end, and the first signal is used to detect the state of the object to be measured;

The signal end receives a second signal from the sensing end in response to the first signal, the second signal is determined based on the state of the object to be measured;

The signal terminal acquires phase and/or amplitude information of the second signal, and the phase and/or amplitude information of the second signal is used to determine the state of the object to be measured.
The method according to claim 1, wherein the signal end sends the first signal to the sensing end, comprising:

The signal end sends a first signal to the sensing end through the first antenna.
The method according to claim 2, wherein the signal terminal receiving the second signal from the sensing terminal in response to the first signal comprises:

The signal end receives the second signal in response to the first signal from the sensing end through the first antenna.
The method according to claim 2 or 3, wherein the signal terminal sends the first signal to the sensing terminal through the first antenna, comprising:

The signal end transmits the first signal to the second port of the first circulator through the first port of the first circulator, and sends the first signal to the sensing end through the first antenna, so The second port of the first circulator is connected to the first antenna.
The method according to claim 1 or 2, wherein the signal end receives the second signal from the sensing end in response to the first signal, comprising:

The signal end receives the second signal in response to the first signal from the sensing end through the second antenna.
The method according to any one of claims 1 to 5, wherein the method further comprises:

The signal end sends a third signal to the sensing end, the third signal is used to detect the state of the object to be measured, and the frequency of the third signal is different from the frequency of the first signal;

The signal end receives a fourth signal from the sensing end in response to the third signal, the fourth signal is determined based on the state of the object to be measured;

The signal terminal acquires phase and/or amplitude information of the fourth signal, and the phase and/or amplitude information of the fourth signal is used in combination with the phase and/or amplitude information of the second signal to determine the the state of the object.
A method for remote sensing, characterized in that it is applied to a sensing system, the sensing system includes a signal end and a sensing end, and the method includes:

The sensing end receives a first signal from the signal end, and the first signal is used to detect the state of the object to be measured;

The sensing end responds to the first signal based on the state of the object to be measured to obtain a second signal;

The sensing end sends the second signal to the signal end.
The method according to claim 7, wherein the sensing terminal receiving the first signal from the signal terminal comprises:

The sensing end receives the first signal from the signal end through the third antenna.
The method according to claim 8, wherein the sending of the second signal from the sensing end to the signal end includes:

The sensing end sends the second signal to the signal end through the third antenna.
The method according to claim 9, wherein the sensing end sends the second signal to the signal end through the third antenna, comprising:

The sensing end transmits the second signal to the first port of the second circulator through the third port of the second circulator, and receives the first signal from the signal end through the third antenna, the first The first port of the second circulator is connected to the third antenna.
The method according to claim 7 or 8, wherein the sensing end sends the second signal to the signal end, comprising:

The sensing end sends the second signal to the signal end through the fourth antenna.
The method according to any one of claims 7 to 11, further comprising:

The sensing end receives a third signal from the signal end, the third signal is used to detect the state of the object to be measured, and the frequency of the third signal is different from the frequency of the first signal;

The sensing end responds to the third signal based on the state of the object to be measured to obtain a fourth signal;

The sensing end sends the fourth signal to the signal end.
A device for remote sensing, characterized in that it is applied to a sensing system, the sensing system includes a signal end and a sensing end, and the device includes:

a transmitter, configured to send a first signal to the sensing end, and the first signal is used to detect the state of the object to be measured;

a receiver, configured to receive a second signal from the sensing end in response to the first signal, the second signal is determined based on the state of the object to be measured;

A processor, configured to acquire phase and/or amplitude information of the second signal, and the phase and/or amplitude information of the second signal is used to determine the state of the object to be measured.
The device according to claim 13, wherein the transmitter includes a first antenna, and the first antenna is used to send a first signal to the sensing end.
The apparatus according to claim 14, wherein the receiver comprises the first antenna for receiving the second signal from the sensing end in response to the first signal.
The device according to claim 14 or 15, wherein the receiver comprises a first circulator, a first port of the first circulator is used to transmit the first signal to the first circulator The second port of the circulator is used to send the first signal to the sensing end through the first antenna, and the second port of the first circulator is connected to the first antenna.
The apparatus according to claim 13 or 14, wherein the receiver comprises a second antenna for receiving the second signal from the sensing end in response to the first signal.
Apparatus according to any one of claims 13 to 17, characterized in that

The receiver is further configured to send a third signal to the sensing end, the third signal is used to detect the state of the object to be measured, and the frequency of the third signal is different from the frequency of the first signal;

The transmitter is further configured to receive a fourth signal from the sensing end in response to the third signal, the fourth signal is determined based on the state of the object to be measured;

The processor is further configured to obtain phase and/or amplitude information of the fourth signal, and the phase and/or amplitude information of the fourth signal is used in combination with the phase and/or amplitude information of the second signal to determine The state of the object to be measured.
A device for remote sensing, characterized in that it is applied to a sensing system, the sensing system includes a signal end and a sensing end, and the device includes:

a receiver, configured to receive a first signal from the signal terminal, and the first signal is used to detect the state of the object to be measured;

a processor, configured to respond to the first signal based on the state of the object to be measured to obtain a second signal;

a transmitter, configured to send the second signal to the signal terminal.
The apparatus according to claim 19, wherein the receiver comprises a third antenna, and the third antenna is used to receive the first signal from the signal terminal.
The device according to claim 20, wherein the transmitter includes the third antenna, and the third antenna is used to send the second signal to the signal terminal.
The apparatus of claim 21, wherein the receiver includes a second circulator, a third port of the second circulator for transmitting the second signal to a second circulator of the second circulator. the first port, and send the second signal to the signal terminal through the third antenna, and the first port of the second circulator is connected to the third antenna.
The device according to claim 19 or 20, wherein the transmitter includes a fourth antenna, and the fourth antenna is used to send the second signal to the signal terminal.
Apparatus according to any one of claims 19 to 23, characterized in that

The receiver is also used to receive a third signal from the signal terminal, the third signal is used to detect the state of the object to be measured, and the frequency of the third signal is different from the frequency of the first signal;

The processor is further configured to respond to the third signal based on the state of the object to be measured, so as to obtain a fourth signal;

The transmitter is further configured to send the fourth signal to the signal terminal.
A perception system, characterized in that it comprises:

a signal terminal, configured to perform the method according to any one of claims 1 to 6; and

A sensing end, configured to execute the method according to any one of claims 7-12.
A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, and when the computer program is run, the computer executes the computer program described in any one of claims 1 to 12. Methods.
A chip, characterized by comprising: a processor, configured to invoke and run a computer program from a memory, so that a communication device installed with the chip executes the method according to any one of claims 1 to 12.
A computer program product, characterized in that, when the computer program product is executed on a computer, it causes the computer to execute the method according to any one of claims 1 to 12.