CN117676853B - Passive wireless dense sensing time-sharing data acquisition method and system - Google Patents
Passive wireless dense sensing time-sharing data acquisition method and system Download PDFInfo
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Abstract
The invention discloses a passive wireless dense sensing time-sharing data acquisition method and system. According to the invention, the report time plan is made for the transceiver, the transceiver drives the MDFC sensor according to the report time plan and performs data acquisition, and when one transceiver acquires, the sensors under other transceivers which are possibly subjected to crosstalk do not send signals, so that the occurrence of the crosstalk phenomenon is avoided, the problem that the positions of the sensors under a plurality of transceivers are close to each other, the phenomenon of crosstalk of probe signals is easily generated at the edge of a coverage area is solved, and the detection accuracy is improved.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a passive wireless dense sensing time-sharing data acquisition method and system.
Background
The microwave direct drive frequency conversion (Microwave Driven Frequency Conversion, MDFC) technology can realize the function of passive frequency conversion of specific microwaves in special materials, and the principle can be referred to in the prior application (patent number: ZL 202310112908.0). The sensor using the technology has the characteristics of immediate response after being driven, different frequency and mutual noninterference of the variable frequency signal and the driving signal, same time width, bandwidth and repetition period, and modulation by the resonance frequency. When the drive signal is turned off, the driven signal immediately disappears.
When MDFC sensors are densely deployed, the problem of overlapping sensor probe frequencies can occur due to limited frequency spectrum resources used and the type of resonant device used within the sensor. The presence of the same frequency sensor in the adjacent transceiver operating region, and when the probe is present in the overlapping range of the transceiver receiving coverage, can result in the receiver calculating erroneous data.
Disclosure of Invention
The invention overcomes the defects of the prior art, and provides a passive wireless dense sensing time-sharing data acquisition method and a system, which are expected to solve the problem that the receiver is easy to calculate error data because sensors with the same frequency exist in the working areas of adjacent transceivers in the prior art.
In order to solve the technical problems, one aspect of the present invention provides a passive wireless dense sensing time-sharing data acquisition method:
A passive wireless dense sensing time-sharing data acquisition method comprises the following steps:
deployment server, transceiver, sensor;
The server makes a report time plan of the transceiver and sends the report time plan to the transceiver;
The server time synchronizes to all transceivers;
and the transceiver drives the MDFC sensor according to the reporting time plan and acquires data, and reports the analyzed data.
The sensor operating under one transceiver needs to use resonance devices with different frequencies, when the transceiver operates, a microwave signal Ft emitted by one transceiver drives a passive wireless sensor Tag within a certain range to operate, when the transceiver operates, different tags generate variable frequency signals with different frequencies, and the transceiver analyzes the frequencies to calculate a measured value. If there are sensors with the same frequency under one transceiver, confusion of the transceivers can occur, resulting in calculation errors.
When the transceivers of multiple groups work simultaneously, because the receiving coverage area of the transceivers is stronger than the transmitting coverage area, when the positions of the sensors under the two transceivers are close, the signals sent by the sensors under the second transceiver can be received by the first transceiver, so that the crosstalk phenomenon of the probe signals is easy to generate at the edge of the coverage area.
According to the invention, the report time plan is made for the transceiver, the transceiver drives the MDFC sensor according to the report time plan and performs data acquisition, and when one transceiver acquires, the sensors under other transceivers which are possibly in crosstalk do not send out signals, so that the occurrence of the crosstalk phenomenon is avoided, and the detection accuracy is improved.
The further technical scheme is that the server makes a report time plan of the transceiver specifically comprising the following steps:
the server counts the number of transceivers to be allocated with tasks, allocates reporting sequence codes for different transceivers, and equally divides a reporting period into equal time segments according to the number of transceivers;
after one reporting period is completed, the next reporting period is executed.
In a further technical scheme, before the server makes a report time plan of the transceiver, the following steps are executed:
Evaluating whether the transceiver deployment environment will produce a reception area aliasing condition;
The transceiver which generates the aliasing condition is set as a report group, and the transceiver and report group information is sent to the server.
The server establishes a report time plan of the transceiver, and the report time plan comprises the following steps:
The server counts the number of transceivers of each reporting group, and distributes reporting sequence codes and reporting time slices corresponding to the reporting sequence codes to different transceivers in the same reporting group;
after one reporting period is completed, each reporting group executes the next reporting period;
the reporting time schedule for transceivers that do not create aliasing problems is configured to collect reports in real-time.
Since there may be multiple transceivers under one server, these transceivers may be present because of the close proximity and proximity of the sensor with resonant device frequencies, resulting in aliasing of the receiving area; it may also be the case that a single transceiver is far from other transceivers.
Meanwhile, the transceivers with the aliasing of the receiving areas do not always have the aliasing phenomenon, so that reporting time plans are set for all transceivers, and all transceivers are required to collect in different time periods, which results in overlong reporting period time and untimely information collection.
By grouping the transceivers according to whether crosstalk can occur or not, the transceivers in the same group are only required to be subjected to reporting time planning, the planning among the transceivers in different groups cannot be influenced, the transceivers which are far away and do not generate crosstalk do not need to be subjected to collecting planning, and reporting can be collected in real time.
The invention also provides a passive wireless dense sensing time-sharing data acquisition system, which comprises a server, a transceiver and a sensor;
the server is used for making a report time plan of the transceiver, sending the report time plan to the transceiver and synchronizing the time to all the transceivers;
The transceiver is used for transmitting continuous electromagnetic wave signals to the passive wireless MDFC sensor according to the reporting time plan and receiving and calculating the frequency of a return signal transmitted by the sensing equipment; reporting the analyzed data to a server;
the sensor is a passive wireless MDFC sensor, and the sensor is internally composed of a microwave frequency conversion device and a resonance device.
Compared with the prior art, the invention has at least the following beneficial effects: according to the invention, the report time plan is formulated for the transceiver, and the transceiver performs sensor driving and data acquisition according to the report time plan, so that when one transceiver acquires, the sensors under other transceivers which are possibly in crosstalk do not send signals, the occurrence of the crosstalk phenomenon is avoided, the problems that the positions of the sensors under a plurality of transceivers are close, the crosstalk phenomenon of probe signals is easily generated at the edge of a coverage area are solved, and the detection accuracy is improved.
Drawings
FIG. 1 is a deployment diagram of a first embodiment;
FIG. 2 is a schematic diagram of a second embodiment;
fig. 3 is a deployment diagram of the second embodiment.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Embodiment one:
A passive wireless dense sensing time-sharing data acquisition method comprises the following steps:
s1: deployment server, transceiver, sensor;
the passive wireless sensor is composed of a microwave frequency conversion device and a resonance device, the resonance devices with different frequencies are needed to be used for the sensor when the sensor works in the same group, and a transceiver transmits a microwave signal Ft to drive the passive wireless sensor (Tag) in a certain range to work when the sensor works in a single group.
As shown in fig. 1, in the present embodiment, there are sensors 1 to 6 (tags 1 to 6) in the transmission coverage of the transceiver 1, sensors 7 to 12 (tags 7 to 12) in the transmission coverage of the transceiver 2, sensors 3, 4, and 7 to 12 are in the reception coverage of the transceiver 2, and sensors 1 to 6, 7, and 8 are in the reception coverage of the transceiver 1.
The above arrangement results in that if transceiver 1 and transceiver 2 are simultaneously in drive operation, transceiver 1 will receive signals from both intersection area sensor 7 and sensor 8, and transceiver 2 will also receive signals from sensor 3 and sensor 4. If the frequencies of the resonant devices of the sensor 3 and the sensor 7 are similar, this may lead to a false calculation of the frequency of the sensor 7 as the frequency of the sensor 3 by the receiver 1, resulting in a data error.
S2: the server makes a report time plan of the transceiver and sends the report time plan to the transceiver;
The server makes a report time plan of the transceiver specifically comprising the following steps:
S21: the server counts the number of transceivers to be allocated with tasks, allocates reporting sequence codes for different transceivers, and equally divides a reporting period into equal time segments according to the number of transceivers;
In this embodiment, a reporting period is 10 seconds, the transceiver is 2 stations, and a time slice is 5 seconds. Namely, the reporting time plan is specifically that only the transceiver 1 transmits in a first time segment, only the sensor in the transmitting coverage area transmits a variable frequency signal according to the characteristics of the passive wireless sensor, so that only the sensors 1-6 transmit the variable frequency signal in the first time segment, the transceiver 1 completes the sensing data acquisition, only the transceiver 2 transmits after the first time segment passes, the sensors 7-12 transmit the variable frequency signal, and the transceiver 2 completes the sensing data acquisition.
S22: after one reporting period is completed, the next reporting period is executed.
S3: the server time synchronizes to all transceivers;
s4: and the transceiver drives the MDFC sensor according to the reporting time plan and acquires data, and reports the analyzed data.
The transceiver 1 and the transceiver 2 complete time-sharing signal transmission, data acquisition and processing analysis according to time and plan, and send the result of the processing analysis to a server to complete data acquisition.
Embodiment two:
The passive wireless dense sensing time-sharing data acquisition method, see fig. 2 and 3, comprises the following steps:
s1: deployment server, transceiver, sensor;
there are 5 transceivers, where transceiver 1 and transceiver 2 and the corresponding sensors create an aliased situation;
The transceiver 3, the transceiver 4 and the corresponding sensors will generate an aliasing situation, and the transceiver 5 and the corresponding sensors will not generate an aliasing situation.
S2: the transceiver which generates the aliasing condition is set as a report group, and the transceiver and report group information is sent to the server.
In this embodiment, the transceiver 1 and the transceiver 2 are a reporting group, and the transceiver 3 and the transceiver 4 are a reporting group;
s3: the server makes a report time plan of the transceiver and sends the report time plan to the transceiver, and the method specifically comprises the following steps:
S31: the server counts the number of transceivers of each reporting group, and distributes reporting sequence codes and reporting time slices corresponding to the reporting sequence codes to different transceivers in the same reporting group;
s32: after one reporting period is completed, each reporting group executes the next reporting period;
s33: the reporting time schedule for transceivers that do not create aliasing problems is configured to collect reports in real-time.
In this embodiment, the reporting time period of the transceiver 1 and the transceiver 2 is 5 seconds, the reporting time period of the transceiver 3 and the transceiver 4 is 5 seconds, and the transceiver 5 collects and reports in real time.
S4: the server time synchronizes to all transceivers;
S5: and the transceiver drives the MDFC sensor according to the reporting time plan and acquires data, and reports the analyzed data.
In this embodiment, when the transceiver 1 completes time-sharing signal transmission and data acquisition, only the transceiver 2 is affected to be inoperative, and the data acquisition of the transceiver 3, the transceiver 4 and the transceiver 5 is not affected;
similarly, when the transceiver 3 finishes time-sharing signal transmission and data acquisition, only the transceiver 4 is influenced to be not operated, and the data acquisition of the transceiver 1, the transceiver 2 and the transceiver 5 is not influenced;
Therefore, under the condition that the arrangement of the transceiver is complex, the problems of overlong information acquisition cycle time and untimely acquisition can be avoided.
Embodiment III:
a passive wireless dense sensing time-sharing data acquisition system comprises a server, a transceiver and a sensor;
the server is used for making a report time plan of the transceiver, sending the report time plan to the transceiver and synchronizing the time to all the transceivers;
The transceiver is used for transmitting continuous electromagnetic wave signals to the passive wireless MDFC sensor according to the reporting time plan and receiving and calculating the frequency of a return signal transmitted by the sensing equipment; reporting the analyzed data to a server;
the sensor is a passive wireless MDFC sensor, and the sensor is internally composed of a microwave frequency conversion device and a resonance device.
Although the application has been described herein with reference to illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope and spirit of the principles of this disclosure. More specifically, various modifications and improvements may be made to the component parts and/or arrangements of the subject combination layout within the scope of the disclosure. In addition to variations and modifications in the component parts and/or arrangements, other uses will be apparent to those skilled in the art.
Claims (4)
1. The passive wireless dense sensing time-sharing data acquisition method is characterized by comprising the following steps of:
deployment server, transceiver, sensor;
Evaluating whether the transceiver deployment environment will produce a reception area aliasing condition;
setting a transceiver which generates an aliasing condition as a reporting group, and transmitting the transceiver and the reporting group information to a server;
the server counts the number of transceivers of each reporting group, distributes reporting sequence codes for different transceivers in the same reporting group, and reports time slices corresponding to the reporting sequence codes, and makes a reporting time plan of the transceivers, and sends the reporting time plan to the transceivers;
The server time synchronizes to all transceivers;
and the transceiver drives the MDFC sensor according to the reporting time plan and acquires data, and reports the analyzed data.
2. The method for collecting passive wireless dense sensing time-sharing data according to claim 1, wherein the server makes a report time plan of the transceiver, specifically comprising the steps of:
after one reporting period is completed, each reporting group executes the next reporting period;
the reporting time schedule for transceivers that do not create aliasing problems is configured to collect reports in real-time.
3. The method for collecting passive wireless dense sensing time-sharing data according to claim 1, wherein the step of distributing reporting time slices to different transceivers in the same reporting group is specifically as follows;
and equally dividing a reporting period into equal time slices according to the number of transceivers.
4. A passive wireless dense sensing time-sharing data acquisition system, which is characterized by adopting the passive wireless dense sensing time-sharing data acquisition method as claimed in any one of claims 1-3, and comprising a server, a transceiver and a sensor;
the server is used for making a report time plan of the transceiver, sending the report time plan to the transceiver and synchronizing the time to all the transceivers;
the transceiver is used for transmitting continuous electromagnetic wave signals to the MDFC sensor according to the reporting time plan and receiving and calculating the frequency of return signals transmitted by the sensor; reporting the analyzed data to a server;
The sensor is an MDFC sensor, and the sensor is internally composed of a microwave frequency conversion device and a resonance device.
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