CN112596111B - Obstacle recognition method, device, equipment and readable storage medium - Google Patents
Obstacle recognition method, device, equipment and readable storage medium Download PDFInfo
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
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Abstract
The invention discloses an obstacle identification method, device and equipment and a readable storage medium, wherein the method comprises the following steps: controlling a transmitting link of a radio frequency module of the wireless device to transmit an obstacle detection signal with preset transmitting power; detecting the receiving power of the obstacle detection signal received by the receiving link of the radio frequency module; if the receiving power of the new obstacle detection signal received by any receiving link of the radio frequency module after the obstacle detection signal is received for the first time is greater than 0, determining that an obstacle exists around the wireless device; the received obstacle detection signal is a signal received by the receiving link after being coupled to an RX port through an ANT port of a radio frequency switch of the receiving link. The invention can utilize the existing antenna and circuit design of the wireless device to identify the obstacle around the wireless device.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, a device, and a readable storage medium for identifying an obstacle.
Background
Wireless devices with high gain antennas are often used for outdoor long distance wireless coverage or signal transmission (for example, a wireless bridge is used as a long distance wireless product, and is usually provided with an external high gain directional antenna, the gain of which is more than 10 dBi), when an obstacle, especially a metal object, is blocked near the high gain antenna, strong reflection is caused, the signal amplified by the high gain antenna is reflected back to the antenna by the obstacle, so that the output end performance of a power amplifier of the antenna is affected, and even the power amplifier is damaged or burnt due to the fact that the power amplifier is subjected to excessive power. Therefore, it is necessary to detect an obstacle around the wireless device when the antenna of the wireless device performs a signal transmission operation.
The current antenna mainly selects a high-frequency band with better imaging, such as 76-77 GHz used by an automobile radar; or using more complex antennas, such as a single transmit antenna plus a set of array antennas for reception. Whereas wireless products for signal coverage or transmission, such as Wi-Fi and mobile communications, are low frequency and typically transmit and receive a common antenna. If the wireless device recognizes an obstacle, it is necessary to separate the transmitting and receiving antennas and the link, or to add some couplers for power detection, etc., and it is difficult to recognize the obstacle around the wireless device by using the existing antenna and circuit design of the wireless device.
Disclosure of Invention
The embodiment of the invention provides an obstacle recognition method, device, equipment and readable storage medium, which can recognize obstacles around wireless equipment by utilizing the existing antenna and circuit design of the wireless equipment.
An embodiment of the present invention provides an obstacle identifying method, applied to a wireless device, including:
controlling a transmitting link of a radio frequency module of the wireless device to transmit an obstacle detection signal with preset transmitting power;
detecting the receiving power of the obstacle detection signal received by the receiving link of the radio frequency module;
if the power of the new obstacle detection signal received by any receiving link of the radio frequency module after the obstacle detection signal is received for the first time is greater than 0, determining that an obstacle exists around the wireless device; the received obstacle detection signal is a signal received by the receiving link after being coupled to an RX port through an ANT port of a radio frequency switch of the receiving link.
As an improvement of the above solution, the controlling the transmitting link of the radio frequency module of the wireless device to transmit the obstacle detection signal with a preset transmitting power includes:
when the wireless device is started, controlling a transmitting link of a radio frequency module of the wireless device to transmit an obstacle detection signal with preset transmitting power;
or, include:
in the process of signal data transmission of the wireless equipment, controlling the transmission link timing of the radio frequency module of the wireless equipment to transmit an obstacle detection signal with preset transmission power.
As an improvement of the above, after the determining that there is an obstacle around the wireless device, the method further includes:
judging whether the received power is larger than a preset safe power threshold value or not;
if yes, determining that reflection of the signal transmitted by the wireless device by the obstacle around the wireless device damages a radio frequency amplifier of a transmission link of the wireless device;
if not, it is determined that reflection of the signal transmitted by the wireless device by an obstacle surrounding the wireless device may affect performance of a radio frequency amplifier of the wireless device transmission link.
As an improvement to the above, the safety power threshold p_safe=p_max-p_margin-iso_ant_rx+lna_gain;
wherein, p_max is the maximum power that can be borne by the output end of the radio frequency amplifier of the transmitting link of the wireless device, p_margin is a preset safety margin, iso_ant_rx is the isolation between the ANT port and the Rx port of the radio frequency switch when the radio frequency switch of the receiving link is placed in the Tx channel on state and the Rx channel off state, and lna_gain is the signal gain of the low noise amplifier of the receiving link.
As an improvement of the above solution, the method further includes:
if the radio frequency amplifier of the transmitting link of the wireless equipment is damaged, controlling the wireless equipment to stop signal transmitting work and sending out a safety alarm prompt;
and if the radio frequency amplifier of the transmitting link of the wireless device is not damaged and the received power is larger than a preset slight risk power threshold, controlling the wireless device to send out a slight risk alarm prompt.
As an improvement of the above solution, the wireless device has a plurality of antennas, and the controlling the transmitting link of the radio frequency module of the wireless device to transmit the obstacle detection signal with a preset transmitting power includes:
each transmitting link of the radio frequency module of the wireless equipment is controlled to sequentially transmit obstacle detection signals with preset transmitting power;
the detecting the received power of the obstacle detection signal of the receiving link of the radio frequency module includes:
detecting the receiving power of the obstacle detection signals which are not received for the first time by all receiving links of the radio frequency module after each time the transmitting links are controlled to transmit the obstacle detection signals;
generating a power receiving matrix of the obstacle detection signals according to the received power of the obstacle detection signals which are not received for the first time of all the receiving links detected each time;
if the received power of any receiving link of the radio frequency module, which receives a new obstacle detection signal after receiving the obstacle detection signal for the first time, is greater than 0, determining that an obstacle exists around the wireless device, including:
and if the received power in the power receiving matrix is larger than 0, determining that an obstacle exists around the wireless equipment.
Another embodiment of the present invention correspondingly provides an obstacle identifying apparatus, which includes:
the signal transmission control module is used for controlling a transmission link of a radio frequency module of the wireless equipment to transmit an obstacle detection signal with preset transmission power;
the detection module is used for detecting the received power of the obstacle detection signal received by the receiving link of the radio frequency module;
a first determining module, configured to determine that an obstacle exists around the wireless device if a received power of a new obstacle detection signal received by any receiving link of the radio frequency module after the obstacle detection signal is received for the first time is greater than 0; the received obstacle detection signal is a signal received by the receiving link after being coupled to an RX port through an ANT port of a radio frequency switch of the receiving link.
As an improvement of the above solution, the apparatus further comprises:
the judging module is used for judging whether the received power is larger than a preset safe power threshold value or not;
a second determining module, configured to determine, if the second determining module is configured to determine that reflection of the transmitted signal by the wireless device by an obstacle around the wireless device may damage a radio frequency amplifier of a transmission link of the wireless device;
and the third judging module is used for judging that the reflection of the surrounding barrier of the wireless device on the signal transmitted by the wireless device does not influence the performance of the radio frequency amplifier of the transmitting link of the wireless device if the surrounding barrier is not used for judging whether the surrounding barrier of the wireless device is used for reflecting the signal transmitted by the wireless device.
Another embodiment of the present invention provides a wireless device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, where the processor executes the computer program to implement the obstacle identifying method according to the embodiment of the present invention.
Another embodiment of the present invention provides a storage medium, where the computer readable storage medium includes a stored computer program, where when the computer program runs, a device where the computer readable storage medium is controlled to execute the obstacle identifying method according to the embodiment of the present invention.
Compared with the prior art, one of the technical schemes has the following advantages:
by controlling the transmitting link of the radio frequency module of the wireless device to transmit a low-power obstacle detection signal, the present inventors have found through intensive studies that: the characteristic that the ANT port and the RX port of the radio frequency switch are not completely isolated and can be coupled with passing power can be utilized to detect the receiving power of the obstacle detection signal of the receiving link of the radio frequency module, so as to judge whether the periphery of the wireless device is provided with an obstacle or not; and if the receiving power of the new obstacle detection signal received by any receiving link of the radio frequency module after the obstacle detection signal is received for the first time is larger than 0, judging that obstacles exist around the wireless equipment. Therefore, the embodiment of the invention can receive and demodulate the obstacle detection signal through the receiving link of the existing radio frequency module without additionally adding a directional coupler for power detection. Therefore, the embodiment of the invention can identify the obstacle around the wireless device by utilizing the existing antenna and circuit design of the wireless device. Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
Fig. 1 is a flow chart of an obstacle identifying method according to an embodiment of the invention;
fig. 2 illustrates a process of transmitting a barrier detection signal by a transmitting link of a wireless device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an obstacle identifying apparatus according to an embodiment of the present invention;
fig. 4 is a schematic flow structure of a wireless device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a flow chart of an obstacle identifying method according to an embodiment of the invention is shown. The method applies to a wireless device, and is illustratively performed by a processor of the wireless device. The method comprises the following steps:
s10, controlling a transmitting link of a radio frequency module of the wireless device to transmit an obstacle detection signal with preset transmitting power.
Wherein the obstacle detection signal is a special frame to which the identification field is added. The identification field identifies that the frame is a data frame for detecting obstacle usage, distinguishing between management frames such as Beacon/ACK and transmission information. There is no particular requirement as to how the frame of the obstacle detection signal is identified, as long as it can be distinguished from other control frames and data frames, identifying this as a detection frame. The obstacle detection signal may use a low order modulation, such as MCS0. Because of the low order modulation, the transceiver can receive and demodulate weaker signals, and the range for judging nearby obstacles is correspondingly larger. Therefore, the obstacle detection signal can be modulated at a low rate.
In addition, the following requirements may be made on the transmit power of the obstacle detection signal: the transmitting power of the obstacle detection signal cannot be too small, and if the transmitting power is too small, the obstacle detection signal cannot be identified by the receiver after path attenuation, so that whether an obstacle exists near the antenna cannot be judged; the transmitting power of the obstacle detection signal cannot be too high, if the transmitting power is too high, the standing wave of the antenna may be too large due to the close-range metal obstacle, and most of the energy is reflected back to the transmitting link and exceeds the upper limit of the power borne by the PA output end of the power amplifier, so that the PA of the power amplifier is damaged. Assuming that a metal barrier exists at the very close distance of the directional antenna of the wireless device, the signal reflection at the moment is close to a total reflection state, and the path attenuation of the section of path attenuation of the PA output signal of the power amplifier is negligible through antenna emission- > barrier reflection- > antenna reception. If the maximum power received by the PA output is p_max, and the power margin p_margin (e.g., 3 dB) is properly reserved, the power level of the obstacle detection signal is p_detect=p_max-p_margin. (p_detect refers to the power of the obstacle detection signal output by the PA).
Specifically, the obstacle detection signaling is divided into two cases: firstly, after the wireless equipment is powered on and started each time, an obstacle detection signal is automatically sent to judge whether an obstacle exists near the antenna; and secondly, in the process of normally transmitting signal data (Beacon frames and data frames are transmitted) by the wireless equipment, the wireless equipment can regularly transmit obstacle detection signals to judge whether an obstacle exists near the antenna or not, so that the wireless equipment is prevented from being electrified and works for a long time, and the surrounding environment of the antenna is changed and obstacle shielding occurs. The transmission time interval time_1 may be set by the user or may be a default of the system, for example, the transmission time interval time_1 may be 10min, 1 hour, 12 hours, or 1 day.
As an example, the antenna of the wireless device is a high gain antenna, and the antenna of the wireless device is connected to the radio frequency module.
S11, detecting the receiving power of the obstacle detection signal received by the receiving link of the radio frequency module.
Whether the surrounding of the wireless device is provided with an obstacle or not and whether the surrounding of the wireless device is provided with the obstacle or not are judged by detecting the power after the obstacle detection signal is reflected. Power detection on the transmit link is typically required by the use of directional couplers, and the inventors have studied to find: the internal ANT port of the radio frequency switch is not completely isolated from the RX port, has a certain coupling degree, and can couple power energy of the electromagnetic wave through a part, so that it can be used for detecting an obstacle detection signal received by the antenna and coupled into the transceiver chip through the radio frequency switch. Therefore, the characteristic that the ANT port and the RX port of the radio frequency switch are not completely isolated and can be coupled with partial electromagnetic wave power energy to detect signal power is utilized to detect the receiving power of the receiving link of the radio frequency module to the obstacle detection signal, so as to judge whether the periphery of the wireless device is provided with an obstacle.
Specifically, the propagation path of the obstacle detection signal after encountering an obstacle is shown in fig. 2. The specific reflection paths can be of the following two types: one type is that the obstacle detection signal is Reflected by an obstacle and returns to the same radio frequency link, as shown in the above figure, the reflected_sigal_11 indicates that the obstacle detection signal transmitted by the first radio frequency link returns to the first radio frequency link after being Reflected by the obstacle; the other type is that the obstacle detection signal enters another radio frequency link after being Reflected, and the reflected_Sigal_1n of the above diagram indicates that the obstacle detection signal transmitted by the first radio frequency link enters the nth radio frequency link after being Reflected by the obstacle.
When the obstacle detection signal is received by the antenna, the obstacle detection signal reversely enters an ANT port of the radio frequency switch RFswitch, and partial energy can be coupled through the ANT port and the RX port due to incomplete isolation, so that the obstacle detection signal power is attenuated by a certain degree in the RFswitch, enters a low-noise amplifier LNA for amplification, and is further received and demodulated by a transceiver.
Specifically, S11 includes: and calculating the received power reflected_signal_kn of the obstacle detection signal transmitted by the kth link, which is not received by the nth link for the first time, according to the isolation Iso_ant_rx of the ANT port and the RX port of the radio frequency switch of the receiving link, the loss passloss_kn of the obstacle detection signal transmitted by the transmitting link on the air propagation path between the two antennas, the transmitting power P_detect and the signal gain LNA_gain of the low noise amplifier of the receiving link. The calculation formula is as follows: reflected_signal_kn=p_decoded-pass_kn-iso_ant_rx+lna_gain.
S12, if the receiving power of any receiving link of the radio frequency module, which receives a new obstacle detection signal after receiving the obstacle detection signal for the first time, is greater than 0, determining that obstacles exist around the wireless device; the received obstacle detection signal is a signal received by the receiving link after being coupled to an RX port through an ANT port of a radio frequency switch of the receiving link.
Wherein, judging whether there is an obstacle by detecting the obstacle detection signal can be divided into the following two cases:
1) Reflection detection for the same radio frequency link
If the sending detection signal and the receiving and transmitting detection signal are the same radio frequency link (including a transmitting link and a receiving link), each time a detection signal is sent, the receiving link part Rx in the radio frequency link detects two detection signals: the first detected detection signal is coupled into the RX path from the RFSwitch internal Tx and RX ports on the link; the second detected detection signal is transmitted outwards through the antenna, reflected by the obstacle and enters the same receiving link. The second detected detection signal is used to evaluate the risk of reflection.
For the second detected obstacle detection signal, it radiates outwards through the antenna, after encountering an obstacle, it is received by the antenna, coupled to the RX port through the ANT port of the transceiver, amplified by the LNA, received by the transceiver and demodulated, its power is reflected_signal_nn=p_decoding-pass_nn-iso_ant_rx+lna_gain, and the power varies with whether the obstacle exists in the outside and with the distance of the obstacle (i.e. the above-mentioned pass_nn is a non-constant value, varying with the external environment).
When the transceiver transmits an obstacle detection signal, and then receives the obstacle detection signal, the received first obstacle detection signal can determine that the signal is internally coupled to the Rx path through the RFswitch; receiving a second detection signal, and judging the reflection risk according to the power of the second obstacle detection signal if the second obstacle detection signal is received; if the second obstacle detection signal is not received, the outside obstacle is not detected, or the outside obstacle is too far away, and the transmission of the wireless signal is hardly affected.
2) Reflection detection between different radio frequency links
If the transmitted detection signal and the received and transmitted detection signal are two different radio frequency links, the kth radio frequency link transmits one detection signal, the nth radio frequency link receives, and if an obstacle exists nearby to cause reflection, the two detection signals are also detected successively: the first detected detection signal is directly transmitted from the kth radio frequency link to the nth radio frequency link; the second detected detection signal is transmitted outwards from the kth radio frequency link, reflected by an obstacle and enters the nth radio frequency link. Likewise, the second detected detection signal is used to evaluate the risk of reflection.
For the second detected detection signal, it radiates outwards through the antenna, after encountering an obstacle, it is received by the antenna, and is coupled to the RX port through the ANT port of RFSwitch, amplified by the LNA, received and demodulated by the transceiver, where the power is reflected_signal_kn=p_decoding-pass_kn-iso_ant_rx+lna_gain, and the power varies with whether the external obstacle exists or not and with the distance of the obstacle (i.e. the above-mentioned pass_nn is not constant and varies with the external environment).
When the k-th radio frequency link of the transducer transmits a detection signal, the n-th radio frequency link receives the detection signal at the same time, and the received first detection signal can judge that the signal is directly transmitted to the n-th radio frequency link from the k-th radio frequency link; receiving a second detection signal, and judging the reflection risk according to the power of the second detection signal; if the second detection signal is not received, the external obstacle is not detected, or the external obstacle is too far away, and the wireless signal is hardly affected.
In the embodiment of the present invention, by controlling the transmitting link of the radio frequency module of the wireless device to transmit a low-power obstacle detection signal, the present inventors have found through intensive studies that: the characteristic that the ANT port and the RX port of the radio frequency switch are not completely isolated and can be coupled with passing power can be utilized to detect the receiving power of the obstacle detection signal of the receiving link of the radio frequency module, so as to judge whether the periphery of the wireless device is provided with an obstacle or not; and if the receiving power of the new obstacle detection signal received by any receiving link of the radio frequency module after the obstacle detection signal is received for the first time is larger than 0, judging that obstacles exist around the wireless equipment. Therefore, the embodiment of the invention can receive and demodulate the obstacle detection signal through the receiving link of the existing radio frequency module without additionally adding a directional coupler for power detection. Therefore, the embodiment of the invention can identify the obstacle around the wireless device by utilizing the existing antenna and circuit design of the wireless device.
Further, after the determining that an obstacle exists around the wireless device, the method further includes:
s13, judging whether the received power is larger than a preset safe power threshold value or not;
s14, if yes, judging that reflection of the signal transmitted by the wireless device by the obstacle around the wireless device damages a radio frequency amplifier of a transmission link of the wireless device;
and S15, if not, judging that the reflection of the obstacle around the wireless device on the signal transmitted by the wireless device can influence the performance of the radio frequency amplifier of the wireless device transmitting link.
In the embodiment of the present invention, the detection result of the received power of the obstacle detection signal is compared with a preset safe power threshold p_safe and a preset slight risk power threshold reflected_signal_kn, and the following risk determination is performed according to the result:
1) Security level: if the power reflected_signal_kn=0 of the Reflected obstacle detection signals detected by all the receiving links, then no obstacle is considered;
2) Slight risk rating: if the power 0 of the obstacle detection signal detected by the receiving link is less than reflected_signal_kn is less than P_safe, but no Reflected detection signal is reflected_signal_kn not less than P_safe, then the obstacle is considered to exist, the wireless performance is possibly affected, and the radio frequency device is not damaged;
3) High risk rating: if the power of the obstacle detection signal detected by any receiving link is reflected_signal_kn not less than P_safe, then the obstacle is considered to influence the wireless performance and possibly cause the damage of the device.
According to the risk judgment, the embodiment of the invention can perform corresponding protection and alarm functions.
When the security level is determined, the wireless device will operate normally and transmit signals normally at the target power.
When the risk level is determined to be slight, the wireless device can work normally, and normally transmits signals according to the target power, but can alarm to remind, the alarm form is not particularly limited, and the alarm can be given out to the user model by utilizing different colors of lights, the flashing frequency of the lights, a buzzer and the like.
When the wireless equipment is judged to be at a high risk level, the wireless equipment stops working wirelessly (including stopping the Beacon), and meanwhile, alarm reminding can be carried out, the alarm form is not limited specifically, and the alarm can be carried out on a user by utilizing different colors of light, the flashing frequency of the light, or a buzzer and the like.
Illustratively, the safe power threshold p_safe=p_max-p_margin-iso_ant_rx+lna_gain; wherein, p_max is the maximum power that can be borne by the output end of the radio frequency amplifier of the transmitting link of the wireless device, p_margin is a preset safety margin, iso_ant_rx is the isolation between the ANT port and the Rx port of the radio frequency switch when the radio frequency switch of the receiving link is placed in the Tx channel on state and the Rx channel off state, and lna_gain is the signal gain of the low noise amplifier of the receiving link.
In the above embodiment of the present invention, further, the wireless device has a plurality of antennas, and the step S10 includes:
each transmitting link of the radio frequency module of the wireless equipment is controlled to sequentially transmit obstacle detection signals with preset transmitting power;
the step S11 includes:
detecting the receiving power of the obstacle detection signals which are not received for the first time by all receiving links of the radio frequency module after each time the transmitting links are controlled to transmit the obstacle detection signals;
and generating a power receiving matrix of the obstacle detection signals according to the received power of the obstacle detection signals which are not received for the first time of all the receiving links detected each time.
The step S12 includes:
and if the received power in the power receiving matrix is larger than 0, determining that an obstacle exists around the wireless equipment.
In the embodiment of the invention, when a plurality of antennas exist, only one specific antenna can emit due to the position of an obstacle and the directivity of the antennas, and when the other specific antenna receives, stronger reflection can occur. In order to cover and identify the risk of such special situations, each antenna is required to transmit the detection signal in turn, and all antennas receive the detection signal, so as to finally obtain a received power matrix of the reflected obstacle detection signal, and the risk assessment is comprehensively performed by analyzing the received power matrix of the reflected obstacle detection signal.
Assuming that the detection signals are sequentially transmitted from the 1 radio frequency link to the nth radio frequency link at a certain time interval, each time the obstacle detection signal is transmitted, all radio frequency links (1-n) receive the obstacle detection signal (the radio frequency switch RFSwitch is not switched and still in the Tx state, because the switch switching time of the RFSwitch is far longer than the propagation time of the electromagnetic wave, the transmitter receives the detection signal when the RFSwitch is placed on the Tx path). Finally, a receiving power matrix of the obstacle detection signal is obtained.
According to the method and the device for identifying the obstacle, disclosed by the embodiment of the invention, the obstacle identification nearby a plurality of antennas can be realized, the receiving power matrix of the obstacle detection signal is obtained through testing through alternate transmission of each antenna and simultaneous reception of all the antennas, and the testing range can cover a larger nearby space, so that the situation that the obstacle cannot be judged is avoided.
Referring to fig. 2, a schematic structural diagram of an obstacle identifying apparatus according to an embodiment of the present invention includes:
a signal transmission control module 10, configured to control a transmission link of a radio frequency module of the wireless device to transmit an obstacle detection signal with a preset transmission power;
a detection module 11, configured to detect a received power of an obstacle detection signal received by a receiving link of the radio frequency module;
a first determining module 12, configured to determine that an obstacle exists around the wireless device if the power of a new obstacle detection signal received by any receiving link of the radio frequency module after the obstacle detection signal is received for the first time is greater than 0; the received obstacle detection signal is a signal received by the receiving link after being coupled to an RX port through an ANT port of a radio frequency switch of the receiving link.
In the embodiment of the present invention, by controlling the transmitting link of the radio frequency module of the wireless device to transmit a low-power obstacle detection signal, the present inventors have found through intensive studies that: the characteristic that the ANT port and the RX port of the radio frequency switch are not completely isolated and can be coupled with passing power can be utilized to detect the receiving power of the obstacle detection signal of the receiving link of the radio frequency module, so as to judge whether the periphery of the wireless device is provided with an obstacle or not; and if the power of the new obstacle detection signal received by any receiving link of the radio frequency module after the obstacle detection signal is received for the first time is greater than 0, judging that obstacles exist around the wireless equipment. Therefore, the embodiment of the invention can receive and demodulate the obstacle detection signal through the receiving link of the existing radio frequency module without additionally adding a directional coupler for power detection. Therefore, the embodiment of the invention can identify the obstacle around the wireless device by utilizing the existing antenna and circuit design of the wireless device.
As an improvement of the above solution, the signal transmission control module 10 is specifically configured to:
when the wireless device is started, a transmitting link of a radio frequency module of the wireless device is controlled to transmit an obstacle detection signal with preset transmitting power.
Or, the signal transmission control module 10 is specifically configured to:
in the process of signal data transmission of the wireless device, controlling the timing of a transmission link of a radio frequency module of the wireless device and transmitting an obstacle detection signal with preset transmission power.
As an improvement of the above solution, the apparatus further comprises:
the judging module is used for judging whether the received power is larger than a preset safe power threshold value or not;
a second determining module, configured to determine, if the signal transmitted by the wireless device is reflected by an obstacle surrounding the wireless device, that a radio frequency amplifier of a transmission link of the wireless device is damaged;
and the third judging module is used for judging that the reflection of the obstacle around the wireless equipment on the signal transmitted by the wireless equipment does not influence the performance of the radio frequency amplifier of the transmitting link of the wireless equipment if the obstacle is not used for judging the signal transmitted by the wireless equipment.
As an improvement to the above, the safety power threshold p_safe=p_max-p_margin-iso_ant_rx+lna_gain;
wherein, p_max is the maximum power that can be borne by the output end of the radio frequency amplifier of the transmitting link of the wireless device, p_margin is a preset safety margin, iso_ant_rx is the isolation between the ANT port and the Rx port of the radio frequency switch when the radio frequency switch of the receiving link is placed in the Tx channel on state and the Rx channel off state, and lna_gain is the signal gain of the low noise amplifier of the receiving link.
As an improvement of the above solution, the second determining module is further configured to:
if the radio frequency amplifier of the transmitting link of the wireless equipment is damaged, controlling the wireless equipment to stop signal transmitting work and sending out a safety alarm prompt;
the third determination module is further configured to:
and if the radio frequency amplifier of the transmitting link of the wireless device is not damaged and the received power is larger than a preset slight risk power threshold, controlling the wireless device to send out a slight risk alarm prompt.
As an improvement of the above solution, the wireless device has multiple antennas, and the signal transmission control module is specifically configured to:
each transmitting link of the radio frequency module of the wireless equipment is controlled to sequentially transmit obstacle detection signals with preset transmitting power;
and the detection module is specifically used for:
detecting the receiving power of the obstacle detection signals which are not received for the first time by all receiving links of the radio frequency module after each time the transmitting links are controlled to transmit the obstacle detection signals;
and generating a power receiving matrix of the obstacle detection signals according to the received power of the obstacle detection signals which are not received for the first time of all the receiving links detected each time.
Referring to fig. 3, a schematic diagram of a wireless device according to an embodiment of the present invention is provided. The wireless device of this embodiment includes: a processor 1, a memory 2 and a computer program, such as an obstacle recognition program, stored in the memory 2 and executable on the processor 1. The steps in the above-described respective obstacle identifying method embodiments are implemented when the processor 1 executes the computer program. Alternatively, the processor 1 may implement the functions of the modules/units in the above-described embodiments of the apparatus when executing the computer program.
The computer program may be divided into one or more modules/units, which are stored in the memory and executed by the processor to accomplish the present invention, for example. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions for describing the execution of the computer program in the wireless device.
The wireless device may be a router or even a handset. The wireless device may include, but is not limited to, a processor, a memory. It will be appreciated by those skilled in the art that the schematic diagram is merely an example of a wireless device and is not limiting of a wireless device, and may include more or fewer components than shown, or may combine certain components, or different components, e.g., the wireless device may also include input-output devices, network access devices, buses, etc.
The processor may be a central processing unit (Central Processing Unit, CPU), other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like that is a control center for the wireless device and that uses various interfaces and lines to connect the various parts of the overall wireless device.
The memory may be used to store the computer program and/or modules, and the processor may implement various functions of the wireless device by running or executing the computer program and/or modules stored in the memory and invoking data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart Media Card (SMC), secure Digital (SD) Card, flash Card (Flash Card), at least one disk storage device, flash memory device, or other volatile solid-state storage device.
Wherein the wireless device integrated module/unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.
It should be noted that the above-described apparatus embodiments are merely illustrative, and 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 over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the drawings of the embodiment of the device provided by the invention, the connection relation between the modules represents that the modules have communication connection, and can be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (7)
1. An obstacle recognition method, applied to a wireless device, comprising:
controlling a transmitting link of a radio frequency module of the wireless device to transmit an obstacle detection signal with preset transmitting power;
detecting the receiving power of the obstacle detection signal received by the receiving link of the radio frequency module;
if the receiving power of the new obstacle detection signal received by any receiving link of the radio frequency module after the obstacle detection signal is received for the first time is greater than 0, determining that an obstacle exists around the wireless device;
judging whether the received power is larger than a preset safe power threshold value or not; if yes, determining that reflection of the signal transmitted by the wireless device by the obstacle around the wireless device damages a radio frequency amplifier of a transmission link of the wireless device; if not, judging that the reflection of the signal transmitted by the wireless device by the obstacle around the wireless device does not influence the performance of the radio frequency amplifier of the transmitting link of the wireless device;
wherein the received obstacle detection signal is a signal received by the receiving link after being coupled to an RX port through an ANT port of a radio frequency switch of the receiving link; the safety power threshold p_safe=p_max-p_margin-iso_ant_rx+lna_gain;
wherein, p_max is the maximum power that can be borne by the output end of the radio frequency amplifier of the transmitting link of the wireless device, p_margin is a preset safety margin, iso_ant_rx is the isolation between the ANT port and the Rx port of the radio frequency switch when the radio frequency switch of the receiving link is placed in the Tx channel on state and the Rx channel off state, and lna_gain is the signal gain of the low noise amplifier of the receiving link.
2. The obstacle recognition method as claimed in claim 1, wherein the controlling the transmission link of the radio frequency module of the wireless device to transmit the obstacle detection signal at a preset transmission power comprises:
when the wireless device is started, controlling a transmitting link of a radio frequency module of the wireless device to transmit an obstacle detection signal with preset transmitting power;
or, include:
in the process of signal data transmission of the wireless equipment, controlling the transmission link timing of the radio frequency module of the wireless equipment to transmit an obstacle detection signal with preset transmission power.
3. The obstacle identifying method as claimed in claim 1, wherein the method further comprises:
if the radio frequency amplifier of the transmitting link of the wireless equipment is damaged, controlling the wireless equipment to stop signal transmitting work and sending out a safety alarm prompt;
and if the radio frequency amplifier of the transmitting link of the wireless device is not damaged and the received power is larger than a preset slight risk power threshold, controlling the wireless device to send out a slight risk alarm prompt.
4. The obstacle identifying method as claimed in claim 1, wherein the wireless device has a plurality of antennas, the controlling the transmission link of the radio frequency module of the wireless device to transmit the obstacle detecting signal at a preset transmission power comprises:
each transmitting link of the radio frequency module of the wireless equipment is controlled to sequentially transmit obstacle detection signals with preset transmitting power;
the detecting the received power of the obstacle detection signal of the receiving link of the radio frequency module includes:
detecting the receiving power of the obstacle detection signals which are not received for the first time by all receiving links of the radio frequency module after each time the transmitting links are controlled to transmit the obstacle detection signals;
generating a power receiving matrix of the obstacle detection signals according to the received power of the obstacle detection signals which are not received for the first time of all the receiving links detected each time;
if the received power of any receiving link of the radio frequency module, which receives a new obstacle detection signal after receiving the obstacle detection signal for the first time, is greater than 0, determining that an obstacle exists around the wireless device, including:
and if the received power in the power receiving matrix is larger than 0, determining that an obstacle exists around the wireless equipment.
5. An obstacle recognition apparatus, characterized by being applied to a wireless device, comprising:
the signal transmission control module is used for controlling a transmission link of a radio frequency module of the wireless equipment to transmit an obstacle detection signal with preset transmission power;
the detection module is used for detecting the received power of the obstacle detection signal received by the receiving link of the radio frequency module;
a first determining module, configured to determine that an obstacle exists around the wireless device if a receiving power of a new obstacle detection signal received by any receiving link of the radio frequency module after the obstacle detection signal is received for the first time is greater than 0; wherein the received obstacle detection signal is a signal received by the receiving link after being coupled to an RX port through an ANT port of a radio frequency switch of the receiving link;
the judging module is used for judging whether the received power is larger than a preset safe power threshold value or not;
the second judging module is used for judging that the reflection of the obstacle around the wireless equipment on the signal transmitted by the wireless equipment damages a radio frequency amplifier of a transmitting link of the wireless equipment if the obstacle is used for judging that the signal transmitted by the wireless equipment is reflected;
a third determining module, configured to determine, if not, that reflection of a signal transmitted by the wireless device by an obstacle surrounding the wireless device affects performance of a radio frequency amplifier of a transmission link of the wireless device;
the safety power threshold p_safe=p_max-p_margin-iso_ant_rx+lna_gain;
wherein, p_max is the maximum power that can be borne by the output end of the radio frequency amplifier of the transmitting link of the wireless device, p_margin is a preset safety margin, iso_ant_rx is the isolation between the ANT port and the Rx port of the radio frequency switch when the radio frequency switch of the receiving link is placed in the Tx channel on state and the Rx channel off state, and lna_gain is the signal gain of the low noise amplifier of the receiving link.
6. A wireless device comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the obstacle recognition method of any one of claims 1 to 4 when executing the computer program.
7. A computer readable storage medium, characterized in that the computer readable storage medium comprises a stored computer program, wherein the computer program, when run, controls a device in which the computer readable storage medium is located to perform the obstacle identifying method according to any one of claims 1 to 4.
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| CN113765597B (en) * | 2021-08-05 | 2023-10-24 | 深圳市武锋技术有限公司 | Method for detecting unmanned aerial vehicle signal, storage medium and unmanned aerial vehicle detection device |
| CN115061215A (en) * | 2022-04-28 | 2022-09-16 | 北京三快在线科技有限公司 | Detection method and device for storage grid, electronic equipment and storage medium |
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