CN116337121A

CN116337121A - Method and device for remote sensing

Info

Publication number: CN116337121A
Application number: CN202111580845.9A
Authority: CN
Inventors: �龙昊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2023-06-27
Also published as: WO2023116317A1

Abstract

The embodiment of the application provides a remote sensing method which is applied to a sensing system, wherein the sensing system comprises a signal end and a sensing end, and the method comprises the following steps: sending a first signal to a sensing end, wherein the first signal is used for detecting the state of an object to be detected; receiving a second signal from the sensing end in response to the first signal, wherein the second signal is determined based on the state of the object to be detected; and acquiring phase and/or amplitude information of the second signal, wherein the phase and/or amplitude information of the second signal is used for determining the state of the object to be detected. According to the method, the problem that the current sensing technology is difficult to deploy in relatively severe environments such as underground, workshops and the like is solved through remote state sensing, and the remote sensing with high sensitivity and easy deployment can be realized.

Description

Method and device for remote sensing

Technical Field

Embodiments of the present application relate to the field of sensing, and more particularly, to a method and apparatus for remote sensing.

Background

The sensor is used as a detection device, can sense the measured information, and can convert the sensed information into an electric signal or other information output in a required form according to a certain rule so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like. There are a number of environmental and state sensing requirements in smart manufacturing, coal mining, etc. scenarios, such as abnormal sensing of equipment state, hazardous gas leakage, liquid component concentration, etc., and thus there are a number of sensor requirements in these scenarios.

Taking coal mining as an example: roof disasters are the most common and most easily occurring accidents of coal mines, and pressure sensors are needed to monitor deformation of a roadway at any time; often accompanied by the existence of gas (methane, etc.) in coal seams, the gas is easy to cause explosion accidents, so a large number of gas sensors need to be deployed to monitor harmful gases, etc.; the faults of large-scale equipment such as coal mining machines, hydraulic supports and the like can also cause disasters, and a large number of sensors are required to be deployed at key positions to monitor the conditions of the equipment.

For these relatively harsh environments, the sensor typically needs to be monitored in such flammable and explosive environments for a long period of time, with high requirements for sensitivity, reliability, power consumption, etc.

However, the current sensing technical scheme has the problem of difficult deployment in severe environments such as underground, workshops and the like, for example, the current optical fiber sensing has high sensitivity, but optical fibers are required to be deployed in long distances; current wireless sensing does not require pulling an optical fiber, but requires additional power to the wireless communication module, and the sensitivity is low relative to optical fiber sensing.

Therefore, how to achieve high sensitivity, and long-distance perception of easy deployment is a problem to be solved.

Disclosure of Invention

The embodiment of the application provides a method and a device for remote sensing, which realize a sensing technology with high sensitivity and easy deployment.

In a first aspect, a method of remote sensing is provided, which may be performed by a signal terminal, or may be performed by a chip or circuit for the signal terminal, which is not limited in this application. For convenience of description, the following description will be given by taking an example of execution by the signal terminal.

The method comprises the following steps: the signal end sends a first signal to the sensing end, and the first signal is used for detecting the state of an object to be detected; the signal end receives a second signal responding to the first signal from the sensing end, and the second signal is determined based on the state of the object to be detected; the signal end acquires phase and/or amplitude information of the second signal, and the phase and/or amplitude information of the second signal is used for determining the state of the object to be detected.

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

For example, the object to be measured may be in close proximity to the sensor or in close proximity to the sensor. For example, the distance between the object to be measured and the sensor may be 0.1m or the like, which is not particularly limited in this application. The object to be measured can be one of solid, liquid and gas, and can also be the existence of non-matter such as an electric field, a magnetic field, heat, attractive force and the like.

It will be appreciated that the first signal is a radio frequency probe signal and the second signal is a probe response signal. The radio frequency detection signal and the radio frequency response signal may be terahertz (THz) signals, millimeter wave signals, or the like, which is not particularly limited in this application.

According to the scheme provided by the application, the problem that the current sensing technology is difficult to deploy in relatively severe environments such as underground, workshops and the like is solved through remote state sensing.

With reference to the first aspect, in certain implementation manners of the first aspect, the sending, by the signal end, a first signal to the sensing end includes: the signal end sends a first signal to the sensing end through the first antenna.

With reference to the first aspect, in certain implementations of the first aspect, the signal receiving a second signal from the sensing end in response to the first signal includes: the signal terminal receives a second signal from the sensing terminal through the first antenna in response to the first signal.

In this implementation, the signal terminals use the same antenna to transmit and receive signals.

With reference to the first aspect, in certain implementations of the first aspect, the signal terminal generates the first signal through a signal generator.

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

In this implementation, the signal terminal uses an independent transceiver antenna to realize the signal transceiving.

With reference to the first aspect, in certain implementation manners of the first aspect, the signal terminal sends a first signal to the sensing terminal through the first antenna, including: the signal end transmits a first signal to a second port of the first circulator through a first port of the first circulator, and sends the first signal to the sensing end through a first antenna, and the second port of the first circulator is connected with the first antenna. Correspondingly, the signal end receives a 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 with the signal receiver.

In this implementation, the first circulator with high isolation is used to realize the sharing of the transmitting and receiving antennas, and the first circulator on the signal end is required to have high isolation, so that the interference of the transmitting signal on the receiving signal on the signal end can be prevented.

Optionally, the first radio frequency switch can also be used for sharing the receiving and transmitting antenna, so that signal transmission and signal reception can be processed in a time-sharing manner, and interference of a signal transmitted by a signal terminal on a received signal is avoided.

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, i.e. a radio frequency detection signal, and the signal end receives a second signal, i.e. a radio frequency response signal, transmitted by the sensor at the sensing end, and performs state sensing of the object to be measured based on the radio frequency response signal.

In this implementation, the radio frequency response signal is a transmission signal. The sensor at the sensing end has the capability of transmitting radio frequency signals, and the transmission characteristic of the sensor is influenced by the state of an object to be detected. 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 detected 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, i.e. a radio frequency detection signal, and the signal end receives a second signal reflected by the sensor at the sensing end, i.e. a radio frequency response signal, and performs state sensing of the object to be measured based on the radio frequency response signal.

In this implementation, the radio frequency-responsive signal is a reflected signal. The sensor at the sensing end has the capability of reflecting radio frequency signals, and the reflection frequency of the sensor can be influenced by the state of an object to be detected. 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 detected by analyzing the signal.

It should be understood that in the embodiments of the present application, information of phase, amplitude, frequency, etc. may be equivalent. The frequency information of the radio frequency response signal is actually a frequency component of stronger amplitude in the reflected signal.

With reference to the first aspect, in some implementations of the first aspect, the signal end sends a third signal to the sensing end, where the third signal is used to detect a state of the object to be detected, and a frequency of the third signal is different from a frequency of the first signal; the signal end receives a fourth signal responding to the third signal from the sensing end, and the fourth signal is determined based on the state of the object to be detected; the signal end acquires phase and/or amplitude information of a fourth signal, and the phase and/or amplitude information of the fourth signal is used for determining the state of the object to be detected by combining the phase and/or amplitude information of the second signal.

In this implementation, the state of the object to be measured is determined by performing spectral analysis on a plurality of detection signals (e.g., a first signal and a third signal) and a plurality of response signals (e.g., a second signal and a fourth signal). To a certain extent, the accuracy of the state information of the object to be detected can be ensured to be perceived in a long distance.

In this implementation, the effect of the state of the object under test on the transmission of the radio frequency signal (e.g., dispersion, attenuation, etc.) is utilized for remote sensing.

It should be noted that, the implementation mode adopts a sweep frequency mode, that is, the collection of a wide frequency band range is completed by switching frequency points. For example, the signal side and the sense side transmit and receive N different frequencies (e.g., f ₁ 、f ₂ 、…、f _N ) To realize remote sensing of the object to be measuredIs a state of (2).

Optionally, the technical scheme of the application may not directly send a wideband radio frequency detection signal through the sweep frequency mode, that is, the signal end, and receive and analyze a corresponding radio frequency response signal. For example, the signal side and the sense side transmit and receive a probe signal and a response signal of a wide frequency band, extract N different frequencies from the frequency range of the wide frequency band signal (e.g., f ₁ 、f ₂ 、…、f _N ) And a response signal component to achieve remote sensing of the state of the object to be measured.

Optionally, the technical scheme of the application can also send and receive a plurality of broadband radio frequency signals through a sweep frequency mode, namely, the collection of the broadband signals is completed through switching frequency points. For example, the signal side and the sense side transmit/receive a wideband signal of n sub-bands (e.g. band ₁ 、band ₂ 、…、band _n ) And extracting therefrom N different frequencies (e.g., f ₁ 、f ₂ 、…、f _N ) And the detection signal and the response signal of the object to be detected are detected to realize remote sensing of the state of the object to be detected. Wherein N is less than or equal to N.

In a second aspect, a method of remote sensing is provided, which may be performed by a sensing terminal, or may be performed by a chip or circuit for the sensing terminal, which is not limited in this application. For convenience of description, the following description will be given by taking an example of execution by the sensing terminal.

The method comprises the following steps: the sensing end receives a first signal from the signal end, and the first signal is used for detecting the state of an object to be detected; the sensor of the sensing end responds to the first signal based on the state of the object to be detected so as to acquire a second signal; the sensing end sends the second signal to the signal end.

It will be appreciated that the first signal is a radio frequency probe signal and the second signal is a probe response signal. The rf detection signal and the rf response signal may be terahertz signals, millimeter wave signals, or the like, which is not specifically limited in this application.

With reference to the second aspect, in certain implementations of the second aspect, the sensing terminal receives the first signal from the signal terminal, including: the sensing end receives the first signal from the signal end through the third antenna.

In one possible implementation manner, the sensor at the sensing end has the capability of transmitting the radio frequency signal, and at the same time, the transmission characteristic of the sensor is 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 detected by analyzing the signal.

In another possible implementation, the sensor at the sensing end has the capability of reflecting the radio frequency signal, and the reflection frequency is 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 detected by analyzing the signal.

With reference to the second aspect, in some implementations of the second aspect, the sensing end sends a second signal to the signaling end, including: the sensing end sends a second signal to the signal end through the third antenna.

With reference to the second aspect, in some implementations of the second aspect, the sensing end sends a second signal to the signaling end, including: the sensing end sends a second signal to the signal end through the fourth antenna.

In this implementation, the sensing end uses an independent transceiver antenna to realize the signal transceiving.

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 a 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 first port of the second circulator is connected with 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 with the sensor.

In this implementation, the second circulator with high isolation is used to realize the sharing of the transmitting and receiving antennas, and the second circulator on the signal end is required to have high isolation, so that the interference of the transmitting signal on the receiving signal on the signal end can be prevented.

Optionally, the second radio frequency switch can also be used for sharing the receiving and transmitting antenna, so that signal transmission and signal reception can be processed in a time-sharing manner, and interference of a signal transmitted by a signal terminal on a received signal is avoided.

With reference to the second aspect, in some implementations of the second aspect, the sensing end receives a third signal from the signal end, the third signal being used to detect a state of the object to be detected, a frequency of the third signal being different from a frequency of the first signal; the sensor of the sensing end responds to the third signal based on the state of the object to be detected to acquire a fourth signal; the sensing end sends a fourth signal to the signal end.

In this implementation, the state of the object to be measured is determined by performing spectral analysis on a plurality of detection signals (e.g., first signal and third signal) and a plurality of response signals (e.g., second signal and fourth signal). To a certain extent, the accuracy of the state information of the object to be detected can be ensured to be perceived in a long distance.

The implementation mode is thatAnd the sweep frequency mode is adopted, namely, the collection of a wide frequency band range is completed by switching frequency points. For example, the signal side and the sense side transmit and receive N different frequencies (e.g., f ₁ 、f ₂ 、…、f _N ) And the detection signal and the response signal of the object to be detected are detected to realize remote sensing of the state of the object to be detected.

Alternatively, the technical scheme of the application can directly send a broadband signal without a sweep frequency mode, namely, the signal end, and receive and analyze a corresponding signal. For example, the signal side and the sense side transmit and receive a probe signal and a response signal of a wide frequency band in which N different frequencies (e.g., f ₁ 、f ₂ 、…、f _N ) And a response signal component to achieve remote sensing of the state of the object to be measured.

In a third aspect, there is provided an apparatus for remote sensing, applied to a sensing system, the sensing system including a signal side and a sensing side, the apparatus comprising: the transmitter is used for transmitting a first signal to the sensing end, and the first signal is used for detecting the state of the object to be detected; a receiver for receiving a second signal from the sensing terminal in response to the first signal, the second signal being determined based on a state of the object to be measured; the processor is further used for acquiring phase and/or amplitude information of the second signal, and the phase and/or amplitude information of the second signal is used for determining the state of the object to be detected.

With reference to the third aspect, in certain implementations of the third aspect, the apparatus further includes a signal generator for generating the first signal.

With reference to the third aspect, in some implementations of the third aspect, the transmitter includes a first antenna for transmitting the first signal to the sensing terminal.

With reference to the third aspect, in certain implementations of the third aspect, the receiver includes a first antenna for receiving a second signal from the sensing terminal in response to the first signal.

With reference to the third aspect, in certain implementations of the third aspect, the receiver includes a second antenna for receiving a second signal from the sensing end in response to the first signal.

Optionally, the apparatus further comprises a signal generator for generating the first signal.

With reference to the third aspect, in certain implementations of the third aspect, the receiver includes a first circulator including a first port, a second port, and a third port, the second port of the first circulator being connected to the first antenna, the second port being connected to the signal generator, the third port being connected to the signal receiver, the first port of the first circulator being configured to transmit the first signal to the second port of the first circulator and to send the first signal to the sensing end through the first antenna. Correspondingly, the signal end receives a 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 with the signal receiver.

Optionally, the receiver further includes a first rf switch, for example, a single pole double throw rf switch SPDT, which functions similarly to the first circulator in the remote sensing device, so the process of receiving and transmitting signals by using the first rf switch may refer to the implementation of the first circulator, which is not described herein in detail. .

In the implementation manner, the first radio frequency switch can also be used for sharing the receiving and transmitting antenna, and signal transmission and signal reception can be processed in a time-sharing manner, so that interference of a signal transmitted by a signal terminal on a received signal is avoided.

With reference to the third aspect, in some implementations of the third aspect, the first signal may be a pulse signal or a continuous wave signal, i.e. a radio frequency detection signal, and the receiver is further configured to receive, at the signal end, a second signal transmitted via the sensor at the sensing end, i.e. a radio frequency response signal; the processor is also used for sensing the state of the object to be detected based on the radio frequency response signal.

With reference to the third aspect, in some implementations of the third aspect, the first signal may be a pulse signal or a continuous wave signal, i.e. a radio frequency detection signal, and the signal end receives a second signal reflected by the sensor at the sensing end, i.e. a radio frequency response signal, and performs state sensing of the object to be measured based on the radio frequency response signal.

With reference to the third aspect, in some implementations of the third aspect, the transmitter is further configured to send a third signal to the sensing end, where the third signal is used to detect a state of the object to be detected, and a frequency of the third signal is different from a frequency of the first signal; the receiver is also used for receiving a fourth signal responding to the third signal from the sensing end, and the fourth signal is determined by the sensor based on the state of the object to be detected; the processor is further used for acquiring phase and/or amplitude information of a fourth signal, and the phase and/or amplitude information of the fourth signal is used for determining the state of the object to be detected by combining the phase and/or amplitude information of the second signal.

In a fourth aspect, there is provided an apparatus for remote sensing, applied to a sensing system, the sensing system including a signal side and a sensing side, the apparatus comprising: the receiver is used for receiving a first signal from the signal end, and the first signal is used for detecting the state of an object to be detected; a processor for responding to the first signal based on the state of the object to be measured to obtain a second signal; and the transmitter is used for transmitting the second signal to the signal end.

With reference to the fourth aspect, in some implementations of the fourth aspect, the apparatus further includes a transmission line. The transmission line (e.g., sensing fiber) includes a sensor; alternatively, the transmission line is independent of the sensor and the transmission line is coupled to the sensor.

The transmission line (transmission line) is a device for transmitting electromagnetic energy in a linear structure, and is an important component of a telecommunication system, and is used for transmitting electromagnetic waves carrying information from one point to another along a route defined by the transmission line.

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

With reference to the fourth aspect, in some implementations of the fourth aspect, the receiver includes a third antenna for receiving the first signal from the signal terminal.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transmitter includes a third antenna for transmitting the second signal to the signal terminal.

In this implementation, the sensing end uses the same antenna to realize the signal transceiving.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transmitter includes a fourth antenna for transmitting the second signal to the signal terminal.

Optionally, the apparatus may further include a transmission line connected to the third antenna and the fourth antenna for transmitting the rf probe received by the third antenna to the sensor and transmitting the rf response signal generated by the sensor in response to the rf probe to the fourth antenna.

With reference to the fourth aspect, in some implementations of the fourth aspect, the receiver includes a second circulator, where 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, the second port and the third port are connected to two ends of the transmission line, respectively, and the third port of the second circulator is configured to transmit the second signal to the first port of the second circulator, and send the second signal to the signal end through the second port and 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 with the sensor.

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

An absorption resistor (e.g., a first resistor) is added between the third port and the second port to prevent interference caused by reflected signals from the transmission line or the sensor.

Optionally, the receiver further includes a second rf switch, for example, a single pole double throw rf switch SPDT, which functions similarly to the second circulator in the remote sensing device, so the process of receiving and transmitting signals by using the second rf switch may refer to the implementation of the second circulator, which is not described herein in detail.

In the implementation manner, the second radio frequency switch can also be used for sharing the receiving and transmitting antenna, and signal transmission and signal reception can be processed in a time-sharing manner, so that interference of a signal transmitted by a signal terminal on a received signal is avoided.

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 end, where the third signal is used to detect a state of the object to be detected, and a frequency of the third signal is different from a frequency of the first signal; the processor is further used for responding to the third signal based on the state of the object to be detected so as to acquire a fourth signal; and the transmitter is also used for transmitting a fourth signal to the signal end.

In a fifth aspect, there is provided a perception system comprising: a signal terminal for performing the method of the first aspect or any one of the possible implementation manners of the first aspect; and/or a sensing terminal, configured to perform the method in the second aspect or any one of the possible implementation manners of the second aspect.

In a sixth aspect, a computer readable storage medium is provided, the computer readable storage medium storing a computer program or code which, when run on a computer, causes the computer to perform the method of the first aspect or any one of the possible implementations of the first aspect or cause the computer to perform the method of the second aspect or any one of the possible implementations of the second aspect.

In a seventh aspect, a chip is provided, comprising at least one processor coupled to a memory for storing a computer program, the processor being configured to invoke and run the computer program from the memory, to cause a signal end, on which the chip system is installed, to perform the method of the first aspect or any of the possible implementations of the first aspect, and/or to cause a sensing end, on which the chip system is installed, to perform the method of the second aspect or any of the possible implementations of the second aspect.

The chip may include an input circuit or interface for transmitting information or data, and an output circuit or interface for receiving information or data, among other things.

In an eighth aspect, a computer program product is provided, the computer program product comprising computer program code which, when run by a signal terminal, causes the signal terminal to perform the method of the first aspect or any of the possible implementations of the first aspect; alternatively, the computer program code, when run by a sensing terminal, causes the sensing terminal to perform the method of the second aspect or any of the possible implementations of the second aspect.

According to the scheme provided by the embodiment of the application, the method for remote sensing is provided, and the problem that the current sensing technical scheme is difficult to deploy in severe environments such as underground, workshops and the like is solved through remote state sensing (for example, the current optical fiber sensing has high sensitivity but needs to deploy optical fibers for a long distance, the current wireless sensing does not need to draw optical fibers, but needs to additionally supply power for a wireless communication module, and the sensitivity is lower than that of the optical fiber sensing), so that the high-sensitivity and easy-to-deploy remote sensing is realized.

Drawings

Fig. 1 is a schematic diagram illustrating an example of the operation principle of the distributed optical fiber sensor to which the present application is applied.

Fig. 2 is a schematic diagram showing an example of a method of remote sensing to which the present application is applied.

Fig. 3 is a schematic view of an example of a device for remote sensing to which the present application is applied.

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

Fig. 5 is another exemplary illustration of a device suitable for remote sensing of the present application.

Fig. 6 is another exemplary illustration of a method of remote sensing applicable to the present application.

Fig. 7 is a schematic view of still another example of a device to which the remote sensing of the present application is applied.

Fig. 8 is a schematic diagram of still another example of a method of remote sensing to which the present application is applied.

Fig. 9 is a schematic view of still another example of a device to which the remote sensing of the present application is applied.

Fig. 10 is a schematic diagram of still another example of a method of applying the remote sensing of the present application.

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

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

Detailed Description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

The sensor is a kind of detecting device, which can sense the measured information and convert the sensed information into electric signal or other information output in required form according to certain rules to meet the requirement of information transmission, processing, storage, display, record, control, etc.

The characteristics of the sensor include microminiaturization, digitalization, intellectualization, multifunction, systemization and networking. The method is a primary link for realizing automatic detection and automatic control. The existence and development of the sensor can lead the object to have sense organs such as touch sense, taste sense, smell sense and the like, and lead the object to be slowly activated. Generally, the basic sensing functions of the sensor are classified into ten categories of thermosensitive elements, photosensitive elements, gas-sensitive elements, force-sensitive elements, magnetic-sensitive elements, humidity-sensitive elements, acoustic-sensitive elements, radiation-sensitive elements, color-sensitive elements, taste-sensitive elements and the like.

The sensing technology refers to a technology for acquiring various forms of information with high precision, high efficiency and high reliability, for example, various remote sensing technologies (satellite remote sensing technology, infrared remote sensing technology and the like), intelligent sensing technology and the like. Sensing technology is the technology of a sensor, and can sense the surrounding environment or special substances. For example, gas sensing, light sensing, temperature and humidity sensing, human body sensing and the like, convert analog signals into digital signals and process the digital signals for a central processing unit. The final result is that the gas concentration parameter, the light intensity parameter, whether the detection is performed by people in the range, the temperature and humidity data and the like are displayed.

There are a number of environmental and state sensing requirements in smart manufacturing, coal mining, etc. scenarios, such as abnormal sensing of equipment state, hazardous gas leakage, liquid component concentration, etc., where there are a number of sensor requirements.

By way of example, taking coal mining as an example, roof disasters are the most common and most easily occurring accidents of coal mines, and pressure sensors are needed to monitor deformation of a roadway at any time; often accompanied by the existence of gas (methane, etc.) in coal seams, the gas is easy to cause explosion accidents, so a large number of gas sensors need to be deployed to monitor harmful gases, etc.; the faults of large-scale equipment such as coal mining machines, hydraulic supports and the like can also cause disasters, and a large number of sensors are required to be deployed at key positions to monitor the conditions of the equipment.

Fig. 1 is a schematic diagram illustrating an example of the operation principle of the distributed optical fiber sensor to which the present application is applied. The distributed optical fiber sensing system is one utilizing optical fiber as sensing sensor and signal transmission medium.

The distributed optical fiber sensing system has the working principle that the optical fiber is used as a sensing sensitive element and a transmission signal medium simultaneously, so that the temperature and strain changes at different positions along the optical fiber are detected, and the real distributed measurement is realized.

Illustratively, as shown in fig. 1, a laser emits a light source, and the light beam incident on the light source is transmitted to a modulator via an optical fiber, and is interacted with external measured parameters in the modulator, so that optical properties (such as intensity, wavelength, frequency, phase, polarization state, etc. of the light) are changed to become a modulated optical signal. And transmitting the modulated optical signal to a photoelectric detector through an optical fiber for converting the optical signal into an electric signal. Finally, the spectrum of the substance is analyzed by a spectrum analyzer to identify the information such as the composition, the relative content and the like of the substance, and then the measured parameter is obtained.

However, in complex environments, deployment costs are relatively high. For example, deployment along a roadway is required in a coal mine scenario, which may be up to 20 km or more.

Wireless sensors are another sensor technology suitable for use in embodiments of the present application. The wireless sensor comprises a sensing module and a wireless communication module. The wireless communication module can convert the signals of the sensing module and send out the signals in a radio wave mode.

Illustratively, the sensor node is composed 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., wherein the sensor portion typically employs a semiconductor sensor.

The system is relatively complex, belongs to active equipment, needs to integrate a wireless communication module, and requires extremely low power consumption. In addition, additional deployment of wireless networks for data collection is required, and semiconductor sensors are relatively less sensitive.

In summary, the sensing technology is difficult to deploy in a relatively severe environment and has low sensitivity, and has high requirements on sensitivity, reliability, power consumption and the like. And how to achieve a high sensitivity and a long-distance perception that is easy to deploy, there is currently no solution.

In view of the above, the application provides a method and a device for realizing remote sensing, which ensure the characteristics of high sensitivity and easy deployment and solve the problem that the current sensing technical scheme has difficult deployment in relatively severe environments such as underground, workshops and the like.

To facilitate an understanding of the embodiments of the present application, a brief description of several terms referred to in this application will first be provided.

1. Terahertz (terahermz, THz)

Terahertz is one of the units of wave frequency, also called terahertz, or terahertz, equal to 1000000000000Hz, and is commonly used to represent the frequency of electromagnetic waves.

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

2. Millimeter wave (millimeter wave)

Electromagnetic waves with the wavelength of 1-10 mm are called millimeter waves, the corresponding frequency range is 30-300GHz, and the electromagnetic waves are positioned in the wavelength range where the microwaves and the terahertz waves overlap, so that the electromagnetic waves have the characteristics of two wave spectrums.

3. Evanescent wave (evanescent wave)

An evanescent wave refers to an electromagnetic wave propagating along a medium interface that rapidly decays in amplitude with distance from the interface in a direction perpendicular to the interface. Evanescent waves, also known as evanescent waves, etc., decay exponentially in amplitude with increasing depth perpendicular to the interface and change phase with tangential direction. It should be understood that an evanescent wave is a surface wave.

To facilitate an understanding of the embodiments of the present application, the following description is made:

in the present embodiments, "at least one" refers to one or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. In the text description of the present application, the character "/", generally indicates that the associated object is an or relationship.

It will be appreciated that the various numerical numbers referred to in the embodiments of the present application are merely for ease of description and are not intended to limit the scope of the embodiments of the present application. The sequence numbers of the above-mentioned processes do not mean the sequence of execution sequence, and the execution sequence of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

The "first", "second" and various numerical designations in the embodiments of the present application indicate distinction for convenience of description, and are not intended to limit the scope of the embodiments of the present application. For example, different indication information is distinguished, etc.

In the embodiment of the present application, the "object to be measured" may be equivalently replaced with "analyte to be measured" and "analyte", and the specific name of the "object to be measured" is not specifically limited in the present application.

In the present embodiment, "for indicating" may include for direct indication and for indirect indication. When describing that certain indication information is used for indicating A, the indication information may be included to directly indicate A or indirectly indicate A, and does not represent that the indication information is necessarily carried with A.

The specific indication mode may be any current indication mode, for example, but not limited to, the above indication modes, various combinations thereof, and the like. Specific details of the various indication modes may refer to the current technology and are not described herein. As can be seen from the above, for example, when multiple pieces of information of the same type need to be indicated, different manners of indication of different pieces of information may occur. In a specific implementation process, a required indication mode can be selected according to specific needs, and in this embodiment of the present application, the selected indication mode is not limited, so that the indication mode according to the embodiment of the present application should be understood to cover various methods that can enable a party to be indicated to learn information to be indicated.

Fig. 2 is a schematic diagram of an example of a method 200 of remote sensing to which the present application is applicable. As shown in the figure 2 of the drawings,

s210, the signal end sends a first signal to the sensing end.

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

The first signal is used for detecting the state of the object to be detected.

In this embodiment of the present application, the first signal is a radio frequency detection signal. The radio frequency detection signal may be a terahertz signal, a millimeter wave signal, or the like, which is not specifically limited in this application.

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

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

In another possible implementation manner, 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 second port of the first circulator is connected to the first antenna.

In another possible implementation manner, 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, where the first port of the second circulator is connected to the third antenna.

In another possible implementation manner, the signal end further includes a first rf switch, for example, a single pole double throw rf switch SPDT, which functions similarly to the first circulator in the remote sensing device, so that the process of receiving and transmitting signals by using the first rf switch may refer to the implementation manner of the first circulator and will not be repeated herein.

It should be noted that 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 0.1m or the like, which is not particularly limited in this application. The object to be measured can be one of solid, liquid and gas, and can also be the existence of non-matter such as an electric field, a magnetic field, heat, attractive force and the like.

Optionally, the signal terminal further comprises a signal generator for generating the first signal.

The radio frequency signal may be a wideband signal or a narrowband signal.

In an embodiment of the present application, the signal terminal further includes a device for generating and analyzing a radio frequency signal, for example: frequency modulation unit, spectrum signal analysis unit, signal processing unit, spectrum signal synthesis unit, modulator, etc.

In particular, the frequency modulation unit is used to adjust the frequency of the transmitted signal (e.g., the first signal) to achieve a frequency sweep over a wide frequency range. The signal processing unit is used for extracting and processing information such as frequency, phase, amplitude and the like of the response signal (for example, the second signal), and sensing the remote state of the object to be detected based on the information. The spectrum signal synthesis unit is used for synthesizing the frequency spectrum with the information such as the frequency, the phase and the amplitude of the extracted response signal. The spectrum signal analysis unit is used for analyzing the frequency spectrum, further judging the state of the analyte to be detected, and then outputting the state information of the analyte. It should be noted that, when the frequency sweep is performed, a certain synchronization process is generally required between the signal generator and the signal receiver, so as to correctly implement the signal extraction. The specific implementation manner of the synchronization process is not specifically limited in this application.

In the embodiment of the present application, the generated spectrum may be a set of amplitudes, phases, or frequencies of the received signals corresponding to the respective frequency points, or may be attenuation coefficients, transmission delays, or the like of the respective frequency points obtained through calculation, which is not specifically limited herein. Wherein both the magnitude spectrum and the phase spectrum belong to the spectrum of the signal.

The generated spectrum may be a terahertz spectrum, a millimeter spectrum, or the like, according to different frequency bands of the radio frequency detection signal, which is not particularly limited herein.

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

Wherein the object to be measured may be in close proximity to the sensor or the object to be measured may be in close proximity to the sensor. For example, the distance between the object to be measured and the sensor may be 0.1m or the like, which is not particularly limited in this application.

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

It should be noted that the object to be measured may be one of solid, liquid and gas, or may be non-material such as electric field, magnetic field, heat and attraction.

In the embodiment of the application, the second message The number is a radio frequency response signal. The radio frequency response signal may be a terahertz signal, a millimeter wave signal, or the like, which is not specifically limited in this application. Wherein the frequency of the second signal is f ₁ ’。

In the embodiment of the present application, the radio frequency response signal (i.e., the second signal) may be a transmission signal. The sensor has the capability of transmitting radio frequency signals, and the transmission characteristics of the sensor are affected by the state of an object to be measured. The sensing end sends the signal transmitted by the sensor to the signal end.

By way of example, the sensor may be a segment of bare dielectric fiber (also referred to as a dielectric waveguide, having a structure of solid fibers, hollow fibers, microporous fibers, metal dielectric composite fibers, etc.). For example, when the object to be measured is a solution or a gas, and the composition of the object to be measured changes, the dielectric constant thereof also changes. Since a portion of the energy propagates along the surface in the form of an evanescent wave as the signal propagates over the dielectric fiber, a change in the dielectric constant of the object under test will cause a change in the amplitude or phase of all or a portion of the frequency component of the signal transmitted over the sensor. Or when the sensing section is used for temperature or pressure sensing, the dimension of the sensing section can change due to deformation caused by thermal expansion and contraction reaction or compression, so that the amplitude change or the phase change of all or part of frequency components of a signal transmitted on the sensor can be changed.

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

By way of example, the sensor may be a section of bare dielectric fiber (also known as a dielectric waveguide, having a structure of solid fibers, hollow fibers, microporous fibers, metal dielectric composite fibers, etc.) with a metal grid disposed on its surface. Signal reflection is achieved 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 may affect the reflection characteristics of the radio frequency signal, i.e. the information such as the phase, amplitude, frequency, etc. 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 a change in the dielectric constant of the analyte to be measured will cause a change in the frequency of the reflection at the sensor. Or when the medium fiber sensing section is used for temperature or pressure sensing, the metal grid is deformed due to thermal expansion and contraction reaction or pressure, and the frequency of reflection on the sensor is also changed.

In an embodiment of the present application, the sensing end further includes a device for transmitting radio frequency signals, for example: transmission lines, etc. Wherein the transmission line comprises a sensor, i.e. the transmission and sensing of signals may be different parts on the same transmission line; alternatively, the transmission line is independent of the sensor and the transmission line is coupled to the sensor.

In one possible implementation, a transmission line may include a sense section and a transmission section. The sensing section is a sensor, has sensing capability (for example, is not shielded), can respond to the radio frequency detection signal based on the state of the object to be detected, generates a radio frequency response signal, and the transmission section can transmit the radio frequency response signal to a transmitting antenna (for example, a third antenna) and send the radio frequency response signal to a signal end.

In another possible implementation manner, the transmission line may also be entirely formed by a sensing section (e.g., a sensor), where the sensing section has the capability of sensing and transmitting signals, and is directly connected to the transmitting antenna and the receiving antenna of the sensing end, so that the receiving and transmitting of the radio frequency detection signal and the radio frequency response signal can be completed without an additional transmission section.

It will be appreciated that the sensing section is in close proximity or proximity to the object to be measured, and that the transmission of the radio frequency signal over the sensing section is affected by changes in the state of the analyte.

S230, the sensing end sends a second signal to the signal end.

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

In one 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, the sensing end realizes the signal transceiving through the third antenna, that is, the same antenna.

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

In this implementation, the signal terminal transmits and receives signals through the first antenna, that is, the same antenna is used.

In yet another possible implementation, the signal end receives a second signal from the sensing end in response to the first signal through the second antenna.

In another possible implementation manner, the sensing end further includes a second circulator, where 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, the second port and the third port are respectively connected to two ends of the transmission line, and 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.

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

It should be noted that an absorption resistor (e.g., a first resistor) is added between the second port and the third port to prevent interference caused by the reflected signal from the transmission line or the sensor.

In another possible implementation manner, the sensing end further includes a second rf switch, for example, a single pole double throw rf switch SPDT, which is similar to the second circulator in function in the remote sensing device, so the signal transceiving process using the second rf switch may refer to the implementation manner of the second circulator, which is not repeated herein.

It should be understood that the above several possible implementations are merely illustrative and should not be construed as limiting the technical solutions of the present application. In addition, in the above several possible implementations, the devices (such as an antenna, a circulator, a radio frequency switch, etc.) of the signal end and the sensing end may be used independently or in combination, which is not specifically limited in this application.

S240, the signal end acquires amplitude and/or phase information of a second signal, wherein the amplitude and/or phase information of the second signal is used for determining the state of the object to be detected.

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

Optionally, the signal end may perform state sensing on the object to be detected based on frequency information of the radio frequency response signal. It will be appreciated that the frequency information of the radio frequency-responsive signal is in fact the location of the frequency at which the amplitude of the reflected signal is strong.

In the embodiment of the application, the information such as the phase, the amplitude, the frequency and the like of the radio frequency response signal are equivalent, and can be used for sensing the state 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 for detecting the state of the object to be detected, and the frequency of the third signal is different from that of the first signal; receiving a fourth signal from the sensing end, wherein the fourth signal is determined by the sensor based on the state of the object to be detected in response to the third signal; and extracting phase and/or amplitude information of the fourth signal, and determining the state of the object to be detected by combining the phase and/or amplitude information of the second signal.

Exemplary, the signal side generates and transmits N different frequencies (e.g., f ₁ 、f ₂ 、…、f _N ) The N radio frequency detection signals (e.g., signals 1, 2, …, N) are transmitted to a sensing section (e.g., a sensor) through a transmission line, and the sensing section (e.g., the sensor) responds to the N radio frequency detection signals respectively based on the state change of the object to be detected, thereby outputting corresponding N radio frequency response signals (e.g., signals 1', 2', …, N ') and transmitting the corresponding N radio frequency response signals to the signal terminal. Assuming that the processing period of each frequency signal is T, after t=n×t, the system completes f ₁ 、f ₂ 、…、f _N The signal end extracts at least one of phase information, amplitude information and frequency information of the N radio frequency response signals based on the N radio frequency response signals to generate a frequency spectrum, and performs spectrum signal analysis to judge the state of the object to be detected.

The generated spectrum may be a set of amplitudes, phases, or frequencies of the received signals corresponding to the respective frequency points, or may be attenuation coefficients, transmission delays, or the like of the respective frequency points obtained by calculation, which is not particularly limited herein. Wherein both the magnitude spectrum and the phase spectrum belong to the spectrum of the signal.

It should be noted that, the above implementation mode adopts a sweep frequency mode, that is, the collection of a wide frequency band range is completed by switching frequency points. For example, the signal side and the sense side transmit and receive N different frequencies (e.g., f ₁ 、f ₂ 、…、f _N ) And the detection signal and the response signal of the object to be detected are detected to realize remote sensing of the state of the object to be detected.

Fig. 3 is a schematic diagram of an example of a remote sensing apparatus 300 to which embodiments of the present application are applied. As shown in fig. 3, the device includes two parts, a signal end 310 and a sense end 320. The structure and function of each of the above parts will be described in detail below.

A. Signal terminal

In the embodiment of the present application, the signal terminal 310 includes means 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 spectrum signal analysis unit 314.

Optionally, the signal terminal 310 further includes a signal processing unit, a spectrum signal synthesizing unit, and the like.

Wherein the signal generator 311 is configured to generate a radio frequency detection signal. The signal receiver 312 is configured to receive the radio frequency response signal.

Illustratively, the detected waveform is modulated to a terahertz signal by the signal generator 311. The THz signal may be one of a wideband signal, a narrowband signal, a pulse signal, and a continuous wave signal.

Alternatively, the signal generator 311 may also modulate the detected waveform to a millimeter wave signal, which is not specifically limited in this application.

The antenna T1 is used for transmitting the radio frequency detection signal to the sensing end, and the antenna R1 is used for receiving the radio frequency response signal from the sensing end.

The frequency modulation unit 313 is used to adjust the frequency of the transmitted signal (e.g., the first signal) to achieve a frequency sweep over a wide frequency range.

In the frequency sweep, a certain synchronization process is generally required between the signal generator 311 and the signal receiver 312 in order to correctly extract the signal. The specific implementation manner of the synchronization process is not specifically limited in this application.

The signal processing unit is used for extracting and processing information such as the phase and/or amplitude of the response signal (e.g. the second signal) and sensing the remote state of the analyte to be detected based on the information.

The spectrum signal synthesis unit is used for synthesizing the information of the extracted response signals into a frequency spectrum, the spectrum signal analysis unit is used for analyzing the frequency spectrum, further judging the state of the analyte to be detected, and then outputting the state information of the analyte.

In the embodiment of the present application, the generated spectrum signal may be a set of amplitudes or phases of the received signals corresponding to each frequency point, or may be attenuation coefficients or transmission delays of each frequency point obtained through calculation, which are not specifically limited herein.

B. Sensing terminal

It should be appreciated that in embodiments of the present application, sensing end 320 includes means for sensing an analyte state, including: sensing fiber, antenna T2, antenna R2, etc.

The sensing fiber is used for transmitting radio frequency signals and sensing states. The sensing fiber may include a sensing section 322 (e.g., a sensor) and a transmitting section 321. I.e. the transmission and perception of the signal may be different parts on the same sensing fiber.

Alternatively, the sensing fiber may be entirely formed by a sensing section (e.g., a sensor) having both signal sensing and transmitting capabilities, which is not specifically limited in this application.

Note that the sensing section 322 refers to that the section of fiber has sensing capability (e.g., is not shielded) while transmitting the radio frequency signal, and the transmitting section 321 refers to that the section of fiber only transmits the radio frequency signal, and does not have sensing capability (e.g., is shielded).

It will be appreciated that the sensing segment is in close proximity or proximity to the analyte to be detected and that the transmission of signals over the sensing segment is affected by changes in the state of the analyte. For example, the sensing segment may be a sensor for responding to a detection signal (e.g., a first signal) based on a state of an object to be measured to obtain a response signal (e.g., a second signal) for signal-side extraction of spectral information to enable remote sensing of the state of the analyte to be measured.

Illustratively, the sensing fiber may be a dielectric fiber (also referred to as a dielectric waveguide, having a structure of solid fiber, hollow fiber, microporous fiber, metal dielectric composite fiber, etc.), the sensing section may be a section of exposed dielectric fiber on the sensing fiber, and the other section is a transmission section, which is shielded by the cladding. 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 a change in the dielectric constant of the analyte to be measured will cause a change in the amplitude or phase of the transmission of all or part of the frequency component of the signal on the sensing section of the dielectric fiber. Or when the medium fiber is used for temperature or pressure sensing, the sensing section deforms due to thermal expansion and contraction reaction or compression, the size of the sensing section changes, and the amplitude change or the phase change of all or part of frequency components of the signal transmitted on the sensing section of the medium fiber also changes.

The antenna T2 is configured to transmit a radio frequency response signal to the signal terminal, and the antenna R2 is configured to receive a radio frequency probe signal from the signal terminal.

The two ends of the sensing fiber are respectively connected with 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 by the sensing section of the sensing fiber, and the sensed signal is transmitted to the antenna T2 through the transmission section and is returned to the signal end by the antenna T2.

It should be noted that, in the above implementation, the sensing terminal is passive. That is, the sensing end works without power supply.

Optionally, in the above implementation manner, a signal amplifying device may be further added to the sensing end, so as to implement a further distance between the sensing end and the signal end. It should be appreciated that in this implementation, the sensing side may be active, as this is not particularly limited in this application.

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

s410, the signal terminal generates a signal 1 (e.g., a first signal).

Wherein the center frequency of the signal 1 is f ₁ 。

Exemplary, the signal terminal generates a center frequency f by the frequency modulation unit and the signal generator ₁ Is a signal 1 of (2).

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

Correspondingly, the sensing terminal receives the signal 1 from the signal terminal through the antenna R2 (e.g., a third antenna).

Wherein signal 1 is used to detect the state of the analyte to be detected. The analyte to be detected may be one of solid, liquid and gas, or may be the existence of non-matter such as electric field, magnetic field, heat, attraction, etc.

S430, the sensing terminal converts the signal 1 into the sensing fiber, and responds to the signal 1 based on the state of the analyte to be detected to obtain a signal 1' (e.g., a second signal).

Wherein the sensing fiber comprises a transmission segment and a sensing segment (e.g., a sensor), the sensing segment being in close proximity or proximity to the analyte to be measured.

Illustratively, signal 1 is transmitted through the sensing fiber to the sensing section, influenced by the analyte, such that the state of signal 1 changes, and signal 1' is obtained after the sensing section responds to signal 1.

S440, the sensing terminal transmits the signal 1' to the signal terminal through the antenna T2 (e.g., the fourth antenna).

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

Illustratively, the sensing terminal transmits signal 1' through the sensing fiber to antenna T2 and back through antenna T2 to the signal terminal.

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

The signal terminal extracts and processes information such as amplitude, phase and the like from the signal 1' by means of a signal processing unit.

S460, after t time period, the signal end generates a center frequency f through the frequency modulation unit and the signal generator ₂ And repeating the above steps S410-S450 to obtain information such as amplitude, phase, etc. of the signal 2'.

Wherein, assuming that the processing period of each frequency signal is t, t is a constant greater than 0, the frequency f ₂ And frequency f ₁ Different.

S470, after a time period of t=n×t, the system completes N different frequencies (e.g., f ₁ 、f ₂ 、……、f _N ) The signal end generates a frequency spectrum and performs spectrum signal analysis to judge the state of the analyte to be detected.

It should be noted that, the implementation mode adopts a sweep frequency mode, that is, the collection of a wide frequency band range is completed by switching frequency points. For example, the signal side and the sense side transmit and receive N different frequencies (e.g., f ₁ 、f ₂ 、…、f _N ) And the detection signal and the response signal of the object to be detected are detected to realize remote sensing of the state of the object to be detected.

It should be understood that, in the technical solution of the present application, a wideband radio frequency signal may be directly sent by the signal terminal, and a corresponding signal may be received and analyzed without passing through the sweep frequency mode. For example, the signal side and the sense side transmit and receive a probe signal and a response signal of a wide frequency band in which N different frequencies (e.g., f ₁ 、f ₂ 、…、f _N ) And generates a frequency spectrum in response to the detected signal component to realize remote sensing of the state of the object to be measured.

It should be understood that, according to the technical scheme of the application, a plurality of broadband signals can be sent and received through a sweep frequency mode, namely, the collection of the plurality of broadband signals is completed through frequency point switching. For example, the signal side and the sense side transmit/receive a wideband signal of n sub-bands (e.g. band ₁ 、band ₂ 、…、band _n ) And extracting therefrom N different frequencies (e.g., f ₁ 、f ₂ 、…、f _N ) And generates a frequency spectrum to realize the remote sensing of the state of the object to be measured. Wherein N is less than or equal to N.

Fig. 5 is another exemplary illustration of a device 500 for remote sensing to which embodiments of the present application are applicable. The difference from the device shown in fig. 3 is that the device in fig. 3 is at the sensing end, where the signal is transmitted and sensed on the same transmission line (i.e. sensing fiber). Whereas the sensor 522 of the device of fig. 5 is independent of the transmission line 521, which is connected to the sensor by a coupling structure. As shown in fig. 5, the device includes two parts, a signal end 510 and a sense end 520. The structure and function of each of the above parts will be described in detail below.

A. Signal terminal

In the present embodiment, the signal terminal 510 includes means for generating and analyzing a radio frequency signal, for example, a signal generator 511, a signal receiver 512, an antenna T1 and an antenna R1, a frequency modulation unit 513, a spectrum signal analysis unit 514, and the like.

Optionally, the signal terminal 510 further includes a spectrum signal synthesizing unit, a signal processing unit, and the like.

Wherein the signal generator 511 is configured to generate a radio frequency detection signal. The signal receiver 512 is configured to receive the radio frequency response signal.

Illustratively, the detected waveform is modulated to a terahertz signal by the signal generator 511. The THz signal may be one of a wideband signal, a narrowband signal, a pulse signal, and a continuous wave signal.

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

The frequency modulation unit 513 is used to adjust the frequency of the transmitted signal (e.g., the first signal) to achieve a frequency sweep over a wide frequency range.

In the case of frequency sweep, it is generally necessary to perform a certain synchronization process between the signal generator 511 and the signal receiver 512 in order to accurately extract the signal. The specific implementation manner of the synchronization process is not specifically limited in this application.

The spectrum signal synthesizing unit is configured to synthesize the information of the extracted response signal into a spectrum, and the spectrum signal analyzing unit 514 is configured to analyze the spectrum, further determine the state of the analyte to be detected, and then output the state information of the analyte.

B. Sensing terminal

It should be appreciated that in embodiments of the present application, sensing end 520 includes means for sensing an analyte state, including: transmission line, antenna T2 and antenna R2, sensors, etc.

Wherein the transmission line 521 is used for receiving and transmitting radio frequency signals, and the sensor 522 is used for sensing the state of the analyte. The sensor 522 may also transmit a radio frequency signal while having sensing capability. The transmission line 521 and the sensor 522 are connected together by a coupling structure.

It will be appreciated that sensor 522 is in close proximity or proximity to the analyte to be measured and that the transmission of signals over the sensing segment will be affected by changes in the state of the analyte.

Illustratively, the sensor 522 may be a bare dielectric fiber, and the transmission line 521 may be a dielectric fiber with a shielding cladding, and the sensor 522 is connected to the transmission line 521 by a coupling structure. The sensor 522 is capable of transmitting 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 a change in the dielectric constant of the analyte to be measured will cause a change in the amplitude or phase of the transmission of all or part of the frequency component of the signal across the sensor. Or when the sensor is used for temperature or pressure sensing, the sensor deforms due to thermal expansion and contraction reaction or compression, the size of the sensor changes, and the amplitude change or the phase change of all or part of frequency components transmitted on the sensor can also be changed.

The two ends of the sensor are respectively connected with the antenna T2 and the antenna R2 through transmission lines, so that after signals sent by the signal end are received by the antenna R2, the signals are perceived by the sensor, and the perceived signals are transmitted to the antenna T2 through the transmission lines and returned to the signal end by the antenna T2.

In the embodiment of the application, the transmission line and the sensor are connected through the coupling structure, so that the sensor can be made into a pluggable structure, and the sensor is convenient to implement in application of part of scenes.

Fig. 6 is a schematic diagram illustrating an example of a method 600 of remote sensing to which the present application is applied. As shown in fig. 6, the specific implementation steps include:

s610, the signal terminal generates a signal 1 (e.g., a first signal).

Wherein the center frequency of the signal 1 is f ₁ 。

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

Wherein signal 1 is used to detect the state of the analyte to be detected. The analyte to be detected may be at least one of solid, liquid and gas, or may be the existence of non-matter such as electric field, magnetic field, heat, attraction, etc.

S630, the sensing terminal converts signal 1 into a transmission line via antenna R2 and transmits the signal to the sensor via the transmission line, which responds to signal 1 based on the state of the analyte to be detected to obtain signal 1' (e.g., a second signal).

The sensor is independent of the transmission line, and the sensor and the transmission line are connected through the coupling structure. The sensor is in close proximity or proximity to the analyte to be measured.

Illustratively, signal 1 is transmitted via a transmission line to a sensor, influenced by the analyte, such that the state of signal 1 changes, and the sensor responds to signal 1 to obtain signal 1'.

S640, the sensing terminal sends the signal 1' to the signal terminal through the antenna T2 (e.g., the fourth antenna).

Illustratively, the sensing terminal transmits signal 1' to antenna T2 via a transmission line and returns to the signal terminal via antenna T2.

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

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

S670, after a time period of t=n×t, the system completes N different frequencies (e.g., f ₁ 、f ₂ 、……、f _N ) The signal end generates a frequency spectrum and performs spectrum signal analysis to judge the state of the analyte to be detected.

It should be understood that, in the technical solution of the present application, a wideband radio frequency signal may be directly sent by the signal terminal, and a corresponding signal may be received and analyzed without passing through the sweep frequency mode. For example, the signal side and the sense side transmit and receive a probe signal and a response signal of a wide frequency band in which N different frequencies (e.g., f ₁ 、f ₂ 、…、f _N ) And a response signal component to achieve remote sensing of the state of the object to be measured.

It should be understood that, according to the technical scheme of the application, a plurality of broadband signals can be sent and received through a sweep frequency mode, namely, the collection of the plurality of broadband signals is completed through frequency point switching. For example, the signal side and the sense side transmit/receive a wideband signal of n sub-bands (e.g. band ₁ 、band ₂ 、…、band _n ) And extracting therefrom N different frequencies (e.g., f ₁ 、f ₂ 、…、f _N ) And the detection signal and the response signal of the object to be detected are detected to realize remote sensing of the state of the object to be detected. Wherein N is less than or equal to N.

Fig. 7 is another exemplary illustration of a device 700 for remote sensing to which embodiments of the present application are applicable. The difference from the device shown in fig. 3 is that the device in fig. 3 uses separate transceiving antennas, whereas the device in fig. 7 implements transceiving antenna sharing with a circulator of high isolation (e.g., circulator 1 and circulator 2). As shown in fig. 7, the device includes two parts, a signal end 710 and a sense end 720. The structure and function of each of the above parts will be described in detail below.

A. Signal terminal

In the present embodiment, the signal terminal 710 includes means for generating and analyzing a radio frequency signal, 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 synthesis unit 715, a three-port circulator device (i.e., circulator 1), and the like.

Wherein the signal generator 711 is configured to generate a radio frequency detection signal. The signal receiver 712 is configured to receive a radio frequency response signal.

Illustratively, the detected waveform is modulated to a terahertz signal by a signal generator 711. The THz signal may be one of a wideband signal, a narrowband signal, a pulse signal, and a continuous wave signal.

Optionally, the signal generator 711 may also modulate the detected waveform with a millimeter wave signal, which is not specifically limited in this application.

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

The antenna 1 is used for transmitting a radio frequency detection signal to a signal terminal or for receiving a radio frequency response signal from a signal terminal.

The frequency modulation unit 713 is used to adjust the frequency of the transmitted signal (e.g., the first signal) to achieve a frequency sweep over a wide frequency range.

In general, when scanning is performed, a certain synchronization process needs to be performed between the signal generator 711 and the signal receiver 712 in order to accurately extract the signal. The specific implementation manner of the synchronization process is not specifically limited in this application.

The signal processing unit 714 is configured to extract and process information such as the phase and/or amplitude of the response signal (e.g., the second signal), and based on this information, sense the remote status of the analyte to be detected.

The spectrum signal synthesis unit 715 is configured to synthesize information of the extracted response signal into a spectrum, and the spectrum signal analysis unit 716 is configured to analyze the spectrum, further determine a state of the analyte to be detected, and then output state information of the analyte.

In the embodiment of the present application, the generated spectrum may be a set of amplitudes or phases of the received signals corresponding to the respective frequency points, or may be attenuation coefficients or transmission delays of the respective frequency points obtained by calculation, which are not specifically limited herein. Wherein both the magnitude spectrum and the phase spectrum belong to the spectrum of the signal.

B. Sensing terminal

It should be appreciated that in embodiments of the present application, sensing end 720 includes means for sensing the analyte state, such as a sensing fiber (i.e., one of the transmission lines), a three port circulator device (i.e., circulator 2), or the like.

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

It should be noted that an absorption resistor is added between two ports connected with the sensing fiber, so as to prevent the sensing fiber (sensing section) from interfering the response signal of the sensing end after the strong reflection signal formed by the environment is transmitted through the circulator.

In addition, the sensing fiber is a transmission line used for transmitting and sensing the radio frequency detection signal. It may include a sensing section 722 (e.g., a sensor) and a transmitting section 721.

The sensing section refers to that the section of fiber has sensing capability (e.g., is not shielded) while transmitting the radio frequency signal, and the transmitting section refers to that the section of fiber only transmits the radio frequency signal and does not have sensing capability (e.g., is shielded) to the outside.

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

Alternatively, the sensing fiber may be entirely formed by a sensing section 722 (e.g., a sensor) that is capable of sensing and transmitting signals, which is not specifically limited in this application.

Illustratively, the sensing fiber may be a dielectric fiber and the sensing section may be a bare section. 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 a change in the dielectric constant of the analyte to be measured will cause a change in the amplitude or phase of the transmission of all or part of the frequency component of the signal over the sensing section of the dielectric fiber. Or when the medium fiber sensing section is used for temperature or pressure sensing, the sensing section deforms due to thermal expansion and contraction reaction or compression, at the moment, the size of the medium fiber sensing section can change, and the amplitude change or the phase change of all or part of frequency components of a signal transmitted on the medium fiber sensing section can also be caused to change.

The antenna 2 is used for transmitting a radio frequency response signal to a signal terminal or for receiving a radio frequency probe signal from a signal terminal.

Illustratively, the sensing end uses a circulator for implementing transmit-receive antenna sharing.

Fig. 8 is a schematic diagram illustrating an example of a method 800 of remote sensing to which the present application is applied. As shown in fig. 8, the specific implementation steps include:

s810, the signal terminal generates a signal 1 (e.g., a first signal).

Wherein the center frequency of the 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 terminal receives the signal 1 from the signal terminal via the first port of the circulator 2 (antenna 2).

S830, the sensing end converts the signal 1 into the sensing fiber through the second port (one end connected to the sensing fiber) of the circulator 2, and transmits the signal to the sensing section, and the sensing section responds to the signal 1 based on the state of the analyte to be detected to acquire the signal 1' (e.g., the second signal).

Illustratively, signal 1 is transmitted through the sensing fiber to the sensing section, influenced by the analyte, such that the state of signal 1 changes, and the sensor responds to signal 1 to obtain signal 1'.

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

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

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

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

Illustratively, the signal receiver receives the signal 1 'from the third port (transceiving circuit) of the circulator 1 and extracts and processes information of amplitude, phase, etc. from the signal 1' by means of a signal processing unit.

S860, after t time period, the signal end passes through the FM listThe element sum signal generator generates a center frequency f ₂ And repeating the above steps S810-S850 to obtain information such as amplitude, phase, etc. of the signal 2'.

S870, after a time period of t=n×t, the system completes N different frequencies (e.g., f ₁ 、f ₂ 、……、f _N ) The signal end generates a frequency spectrum through a spectrum signal synthesis unit and performs spectrum signal analysis to judge the state of the analyte to be detected.

It is to be understood that the techniques of this applicationThe operation scheme can also send and receive a plurality of broadband signals through a sweep frequency mode, namely, the acquisition of the broadband signals is completed through switching frequency points. For example, the signal side and the sense side transmit/receive a wideband signal of n sub-bands (e.g. band ₁ 、band ₂ 、…、band _n ) And extracting therefrom N different frequencies (e.g., f ₁ 、f ₂ 、…、f _N ) And the detection signal and the response signal of the object to be detected are detected to realize remote sensing of the state of the object to be detected. Wherein N is less than or equal to N.

Fig. 9 is another exemplary illustration of a device 900 for remote sensing to which embodiments of the present application are applicable. The device of fig. 3 differs from the device of fig. 3 in that the device of fig. 3 exploits the influence of the analyte state on the transmission of the radio frequency signal (dispersion, attenuation, etc.). Whereas the device in fig. 9 uses the effect of the analyte state on the frequency of the reflected signal from the sensor to perform state sensing of the object under test. As shown in fig. 9, the device includes two parts, a signal end 910 and a sense end 920. The structure and function of each of the above parts will be described in detail below.

A. Signal terminal

In the present embodiment, the signal terminal 910 includes a device for generating and analyzing a radio frequency signal, for example: a signal generator 911, a signal receiver 912, a frequency modulation unit 913, a spectrum signal analysis unit 916, a signal processing unit 914, a spectrum signal synthesis unit 915, an antenna T1, an antenna R1, and the like.

Wherein the signal generator 911 is used for generating a radio frequency detection signal. The signal receiver 912 is configured to receive the radio frequency response signal.

Illustratively, the detected waveform is modulated to a terahertz signal by the signal generator 911. The THz signal may be one of a wideband signal, a narrowband signal, a pulse signal, and a continuous wave signal.

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

The signal processing unit 914 is configured to extract and process information such as the phase and/or amplitude of the response signal (e.g., the second signal), and based on this information, perform remote sensing of the analyte to be detected.

The frequency modulation unit 913 is configured to adjust the frequency of the transmitted signal (e.g., the first signal) to achieve a frequency sweep over a wide frequency range.

In the case of frequency sweep, it is generally necessary to perform a certain synchronization process between the signal generator 911 and the signal receiver 912 in order to properly extract the signal. The specific implementation manner of the synchronization process is not specifically limited in this application.

The spectrum signal synthesizing unit 915 is configured to synthesize information of the extracted response signal into a spectrum, and the spectrum signal analyzing unit 916 is configured to analyze the spectrum, further determine a state of the analyte to be detected, and then output state information of the analyte.

B. Sensing terminal

It should be appreciated that in embodiments of the present application, sensing end 920 includes means for sensing the analyte state, e.g., sensing fiber, antenna T2, antenna R2, a three port circulator device, etc.

The sensing fiber is a transmission line and is used for transmitting radio frequency signals and sensing states. The sensing fiber may include a sensing section (e.g., a sensor) and a transmitting section. I.e. the transmission and perception of the signal may be different parts on the same sensing fiber.

The sensing section refers to that the section of the fiber has sensing capability (e.g., is not shielded), and the transmitting section refers to that the section of the fiber only transmits radio frequency signals and does not have sensing capability (e.g., is shielded).

Alternatively, the sensing fiber may be entirely composed of a sensing section (e.g., a sensor) having signal sensing capability, which is not particularly limited in this application.

The sensing fiber may be a dielectric fiber (also called a dielectric waveguide, having a structure of solid fiber, hollow fiber, microporous fiber, metal dielectric composite fiber, etc.), for receiving and sensing THz signals or millimeter wave signals. Wherein the dielectric fiber may include a sensing section and a transmitting section. The transmission section is shielded by the cladding, only transmits radio frequency signals, and does not have the sensing capability. The sensing section can be a section of bare dielectric fiber on the transmission line, and a metal grid is arranged on the surface of the sensing section, so that the sensing section has sensing capability and forms a sensor. Because a part of energy propagates along the surface in the form of an evanescent wave when the signal propagates on the dielectric fiber, a part of the signal is reflected when passing through the metal grid due to the Bragg reflection effect, and the state of the object to be measured affects the reflection characteristics of the radio frequency signal, namely the information of the phase, the amplitude, the frequency and the like of the signal, the application is not particularly limited. 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 changes, and the change in dielectric constant of the analyte to be measured causes a change in the frequency of the reflected signal from the sensor. Or when the sensor is used for temperature or pressure sensing, the metal grid is deformed due to thermal expansion and contraction reaction or pressure, and the frequency of the reflected signal of the sensor is also changed.

The three-port circulator device comprises two antenna ports which are respectively connected with an antenna R2 and an antenna T2, and a third port is connected with a transmission line.

The sensing section responds to the rf detection signal based on the state of the analyte to be detected to obtain a rf response signal, and transmits the rf response signal to the signal terminal through the antenna T2.

Optionally, the technical solution of the present application is suitable for providing multiple sensing segments (e.g. sensor 1, sensor 2, …, sensor n) on one fiber for status sensing of multiple analytes. Since some of the energy propagates in the core as the signal propagates through the dielectric fiber, it is not completely reflected by the sensing segment, and thus may be transmitted to the next sensing segment for state sensing through the transmission segment. In this case, the signal end can distinguish the reflected signals corresponding to different analytes by the time delay of the reflected signals due to the different positions of different sensing segments on the sensing fiber, and identify the states of the different analytes.

Fig. 10 is a schematic diagram illustrating an example of a method 1000 for remote sensing to which the present application is applied. As shown in fig. 10, the specific implementation steps include:

s1010, the signal terminal generates a signal 1 (e.g., a first signal).

Wherein the center frequency of the signal 1 is f ₁ 。

S1020, the signal end sends the signal 1 to the sensing end through the antenna T1 (e.g., the first antenna).

S1030, the sensing terminal converts signal 1 to the sensing fiber through the third port of the three-port circulator, and the sensing section responds to signal 1 based on the state of the analyte to be detected to obtain signal 1' (e.g., the second signal).

The sensing fiber is a transmission line and is used for transmitting radio frequency signals and sensing states, and comprises a transmission section and a sensing section (e.g. a sensor), wherein the sensing section is closely attached to or near an analyte to be detected, and the transmission of the signals on the sensing section can be influenced by the state change of the analyte.

S1040, the sensing terminal transmits the signal 1' to the signal terminal through the antenna T2 (e.g., the fourth antenna).

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

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

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

S1070, after a time period of t=n×t, the system completes N different frequencies (e.g., f ₁ 、f ₂ 、……、f _N ) The signal side generates a spectrum by the spectrum signal synthesizing unit 915 and performs spectrum signal analysis to judge the state of the analyte to be detected.

Alternatively, the technical scheme of the application can directly send a broadband radio frequency signal without a sweep frequency mode, namely, the signal end, and receive and analyze a corresponding signal. For example, the signal side and the sense side transmit and receive a probe signal and a response signal of a wide frequency band in which N different frequencies (e.g., f ₁ 、f ₂ 、…、f _N ) And a response signal component to achieve remote sensing of the state of the object to be measured.

Optionally, the technical scheme of the application can also receive a plurality of broadband signals through a sweep frequency mode, namely, the collection of the broadband signals is completed through switching frequency points. For example, the signal side and the sense side transmit/receive a wideband signal of n sub-bands (e.g. band ₁ 、band ₂ 、…、band _n ) And extracting therefrom N different frequencies (e.g., f ₁ 、f ₂ 、…、f _N ) And the detection signal and the response signal of the object to be detected are detected to realize remote sensing of the state of the object to be detected. Wherein N is less than or equal to N.

In summary, the technical scheme of the application combines wireless communication and medium fiber sensing capability, and can realize remote sensing. The remote sensing method provided by the application is easy to deploy and low in cost. The signal end and the sensing end can be connected through the THz antenna or the millimeter wave antenna, stay wires at the signal end and the sensing end are not needed, the sensing capability of the dielectric fiber is utilized to realize the sensing of the state of the analyte, and the sensing end can even be passive.

It should be understood that the several implementations provided above may be implemented independently and may be used in combination, which is not specifically limited in this application. For example, the antenna T1 and the antenna R1 in fig. 9 may be replaced by a circulator and the antenna 1 in fig. 7 to realize the sharing of the transceiver antenna; for another example, the scheme of the circulator of the sensing end and the single antenna in fig. 7 can be replaced by the dual-antenna scheme (i.e. the antenna T2 and the antenna R2) in fig. 3 and fig. 5 to transmit and receive signals; as another example, the analytes in fig. 3, 5, and 7 may include a plurality, etc., as not specifically limited in this application.

It should be noted that the foregoing implementations are merely exemplary and should not be construed as limiting the technical solutions of the present application.

The method-side embodiment of the remote sensing of the present application is described above in detail with reference to fig. 1 to 10, and the apparatus-side embodiment of the remote sensing of the present application will be described below in detail with reference to fig. 11 and 12. It is to be understood that the description of the device embodiments corresponds to the description of the method embodiments, and that parts not described in detail can therefore be seen in the preceding method embodiments.

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

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

The transceiver unit 1200 is configured to send, to the sensing end, a first signal, where the first signal is used to detect a state of an object to be detected;

the transceiver 1200 is further configured to receive, by the signal end, a second signal from the sensing end in response to the first signal, where the second signal is determined based on a state of the object to be detected;

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

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

the transceiver 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 detected;

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

It should be understood that the remote sensing apparatus 1000 may correspond to the signal end in the method 200, the method 400, the method 600, the method 800, the method 1000 according to the embodiments of the present application, and the remote sensing apparatus 1000 may include units for performing 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 method 200 in the method 1000 in fig. 10. And, each unit in the remote sensing apparatus 1000 and the other operations and/or functions described above are respectively for implementing 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 appreciated that when the remote sensing apparatus 1000 is a signal terminal, the transceiver unit 1200 in the remote sensing apparatus 1000 may be implemented by a transceiver, for example, may correspond to the transceiver 2020 in the remote sensing apparatus 2000 shown in fig. 12, and the processing unit 1100 in the remote sensing apparatus 1000 may be implemented by at least one processor, for example, may correspond to the processor 2010 in the remote sensing apparatus 2000 shown in fig. 12.

It should be further understood that, when the remote sensing apparatus 1000 is a chip or a chip system configured in a signal end, the transceiver unit 1200 in the remote sensing apparatus 1000 may be implemented by an input/output interface, a circuit, etc., and the processing unit 1100 in the remote sensing apparatus 1000 may be implemented by a processor, a microprocessor, an integrated circuit, etc. integrated on the chip or the chip system.

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

Illustratively, the transceiver unit 1200 is configured to receive, by the sensing unit, a first signal from the signal end, where the first signal is used to detect a state of an object to be detected;

A processing unit 1100, configured to sense a first signal in response to a state of an object to be measured, so as to obtain a second signal;

the transceiver 1200 is further configured to send the second signal to the signal terminal by the sensing terminal.

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

the processing unit 1100 is further configured to sense a third signal that is responded by the end group based on the state of the object to be measured, so as to obtain a fourth signal;

the transceiver 1200 is further configured to send a fourth signal to the signal terminal by the sensing terminal.

It should be understood that the remote sensing apparatus 1000 may correspond to the sensing end of the

methods

200, 400, 600, 800, 1000 according to embodiments of the present application, and the remote sensing apparatus 1000 may include units for performing 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 method 1000 in fig. 10. And, each unit in the remote sensing apparatus 1000 and the other operations and/or functions described above are respectively for implementing 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 appreciated that when the remote sensing apparatus 1000 is a sensing terminal, the transceiver unit 1200 in the remote sensing apparatus 1000 may be implemented by a transceiver, for example, may correspond to the transceiver 2020 in the remote sensing apparatus 2000 illustrated in fig. 12, and the processing unit 1100 in the remote sensing apparatus 1000 may be implemented by at least one processor, for example, may correspond to the processor 2010 in the remote sensing apparatus 2000 illustrated in fig. 12.

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

Fig. 12 is another illustration of a device for remote sensing provided by an embodiment of the present application. As shown in fig. 12, the apparatus 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 are in communication with each other through an internal connection path, the memory 2030 is used for storing instructions, and the processor 2010 is used for executing the instructions stored in the memory 2030 to control the transmitter 2020 to transmit signals and the receiver 2040 to receive signals.

It should be appreciated that the remote sensing apparatus 2000 may correspond to the signal side or the sensing side in the above-described method embodiments, and may be used to perform the steps and/or processes performed by the signal side or the sensing side in the above-described method embodiments.

Alternatively, 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 a separate device or may be integrated within the processor 2010. The processor 2010 may be configured to execute instructions stored in the memory 2030 and when the processor 2010 executes the instructions stored in the memory, the processor 2010 is configured to perform the steps and/or processes of the method embodiments described above that correspond to the signal or sense side.

Optionally, the remote sensing apparatus 2000 is a signal terminal or a sensing terminal in the foregoing embodiment.

Wherein the transmitter 2020 may include a transmitter and the receiver 2040 may include a receiver. The processor 2010 and memory 2030 may be integrated on separate chips than the transmitter 2020 and receiver 2040. For example, the processor 2010 and the memory 2030 may be integrated in a baseband chip and the transmitter 2020 and the receiver 2040 may be integrated in a radio frequency chip. The processor 2010 and memory 2030 may also be integrated on the same chip as the transmitter 2020 and receiver 2040. The present application is not limited in this regard.

Alternatively, the remote sensing apparatus 2000 is a component, such as a circuit, chip, system-on-chip, etc., disposed in a signal or sensing side.

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

It should be understood that the specific examples in the embodiments of the present application are only for helping those skilled in the art to better understand the technical solutions of the present application, and the above specific implementation may be considered as the best implementation of the present application, and not limit the scope of the embodiments of the present application.

It should be noted that the actions or methods performed by the controller may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, the acts or methods performed by the controller may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the processes or functions described in accordance with the embodiments of the present application are all or partially produced. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wired (e.g., 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, data center, etc. that contains one or more sets of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., optical disk (digital video disc, DVD)), or a semiconductor medium, which may be a solid state disk.

Alternatively, the memory and the processor in the above embodiments of the apparatus may be physically separate units, or the memory may be integrated with the processor, which is not limited in this application.

The processor in the embodiments of the present application may be an integrated circuit chip with the capability of processing signals. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (digital signal processor, DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (field programmable gate array, FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware encoding processor executing, or may be implemented by a combination of hardware and software modules in the encoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

The memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and direct memory bus RAM (DRRAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may 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 in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the present technology or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, etc.) to perform all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a read-only memory (ROM), a random-access memory (RAM), a magnetic disk, or an optical disk, etc.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of remote sensing, applied to a sensing system, the sensing system including a signal side and a sensing side, the method comprising:

the signal end sends a first signal to the sensing end, and the first signal is used for detecting the state of an object to be detected;

the signal end receives a second signal from the sensing end, which is responsive to the first signal, and the second signal is determined based on the state of the object to be detected;

the signal end acquires phase and/or amplitude information of the second signal, and the phase and/or amplitude information of the second signal is used for determining the state of the object to be detected.

2. The method of claim 1, wherein the signaling end sends a first signal to the sensing end, comprising:

The signal terminal transmits a first signal to the sensing terminal through a first antenna.

3. The method of claim 2, wherein the signal receiving a second signal from the sense terminal in response to the first signal comprises:

the signal terminal receives the second signal from the sensing terminal in response to the first signal through the first antenna.

4. A method according to claim 2 or 3, wherein the signal terminal transmits a first signal to the sensing terminal via a 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, and the second port of the first circulator is connected with the first antenna.

5. The method of claim 1 or 2, wherein the signal receiving a second signal from the sensing terminal in response to the first signal comprises:

the signal end receives the second signal from the sensing end in response to the first signal through a second antenna.

6. The method according to any one of claims 1 to 5, further comprising:

The signal end sends a third signal to the sensing end, wherein the third signal is used for detecting the state of an object to be detected, and the frequency of the third signal is different from that of the first signal;

the signal end receives a fourth signal responding to the third signal from the sensing end, and the fourth signal is determined based on the state of the object to be detected;

the signal end acquires phase and/or amplitude information of the fourth signal, and the phase and/or amplitude information of the fourth signal is used for determining the state of the object to be detected by combining the phase and/or amplitude information of the second signal.

7. A method of remote sensing, applied to a sensing system, the sensing system including a signal side and a sensing side, the method comprising:

the sensing end receives a first signal from the signal end, and the first signal is used for detecting the state of an object to be detected;

the sensing end responds to the first signal based on the state of the object to be detected to acquire a second signal;

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

8. The method of claim 7, wherein the sensing terminal receives a first signal from the signal terminal, comprising:

The sensing end receives a first signal from the signal end through a third antenna.

9. The method of claim 8, wherein the sensing terminal transmitting the second signal to the signal terminal comprises:

the sensing end sends the second signal to the signal end through the third antenna.

10. The method of claim 9, wherein the sensing terminal transmitting the second signal to the signal terminal through the third antenna comprises:

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 first port of the second circulator is connected with the third antenna.

11. The method according to claim 7 or 8, wherein the sensing terminal sends the second signal to the signal terminal, comprising:

the sensing end sends the second signal to the signal end through a fourth antenna.

12. 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 for detecting the state of an object to be detected, and the frequency of the third signal is different from that of the first signal;

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

and the sensing end sends the fourth signal to the signal end.

13. A device for remote sensing, characterized by being applied to a sensing system, the sensing system comprising a signal end and a sensing end, the device comprising:

the transmitter is used for transmitting a first signal to the sensing end, and the first signal is used for detecting the state of an object to be detected;

the receiver is used for receiving a second signal responding to the first signal from the sensing end, and the second signal is determined based on the state of the object to be detected;

and the processor is used for acquiring the phase and/or amplitude information of the second signal, and the phase and/or amplitude information of the second signal is used for determining the state of the object to be detected.

14. The apparatus of claim 13, wherein the transmitter comprises a first antenna for transmitting a first signal to the sensing terminal.

15. The apparatus of claim 14, wherein the receiver comprises the first antenna for receiving the second signal from the sense terminal in response to the first signal.

16. The apparatus of claim 14 or 15, wherein the receiver comprises a first circulator, a first port of the first circulator for transmitting the first signal to a second port of the first circulator and transmitting the first signal to the sensing port via the first antenna, the second port of the first circulator being coupled to the first antenna.

17. The apparatus of claim 13 or 14, wherein the receiver comprises a second antenna for receiving the second signal from the sensing terminal in response to the first signal.

18. The device according to any one of claims 13 to 17, wherein,

the receiver is further configured to send a third signal to the sensing end, where the third signal is used to detect a state of an object to be detected, and a frequency of the third signal is different from a 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, where the fourth signal is determined based on the state of the object to be detected;

the processor is further configured to obtain phase and/or amplitude information of the fourth signal, where the phase and/or amplitude information of the fourth signal is used to determine a state of the object to be measured in combination with the phase and/or amplitude information of the second signal.

19. A device for remote sensing, characterized by being applied to a sensing system, the sensing system comprising a signal end and a sensing end, the device comprising:

the receiver is used for receiving a first signal from the signal end, and the first signal is used for detecting the state of an object to be detected;

a processor for responding to the first signal based on the state of the object to be detected to obtain a second signal;

and the transmitter is used for transmitting the second signal to the signal terminal.

20. The apparatus of claim 19, wherein the receiver comprises a third antenna for receiving the first signal from the signal terminal.

21. The apparatus of claim 20, wherein the transmitter comprises the third antenna for transmitting the second signal to the signal terminal.

22. The apparatus of claim 21, wherein the receiver comprises a second circulator, a third port of the second circulator for transmitting the second signal to a first port of the second circulator and transmitting the second signal to the signal terminal through the third antenna, the first port of the second circulator being coupled to the third antenna.

23. The apparatus of claim 19 or 20, wherein the transmitter comprises a fourth antenna for transmitting the second signal to the signal terminal.

24. The device according to any one of claims 19 to 23, wherein,

the receiver is further configured to receive a third signal from the signal end, where the third signal is used to detect a state of an object to be detected, and a frequency of the third signal is different from a frequency of the first signal;

the processor is further used for responding to the third signal based on the state of the object to be detected so as to acquire a fourth signal;

the transmitter is further configured to transmit the fourth signal to the signal end.

25. A perception system, comprising:

signal terminal for performing the method of any one of claims 1 to 6; and

a sensing terminal for performing the method of any of claims 7 to 12.

26. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when run, causes the computer to perform the method according to any of claims 1 to 12.

27. A chip, comprising: a processor for calling and running a computer program from a memory, causing a communication device on which the chip is mounted to perform the method of any one of claims 1 to 12.

28. A computer program product, characterized in that the computer program product, when executed on a computer, causes the computer to perform the method of any of claims 1 to 12.