CN117111003A - Calibration method for high-precision measurement of signal amplitude - Google Patents
Calibration method for high-precision measurement of signal amplitude Download PDFInfo
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- CN117111003A CN117111003A CN202310946799.2A CN202310946799A CN117111003A CN 117111003 A CN117111003 A CN 117111003A CN 202310946799 A CN202310946799 A CN 202310946799A CN 117111003 A CN117111003 A CN 117111003A
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- 238000005259 measurement Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000001514 detection method Methods 0.000 claims abstract description 38
- 238000012545 processing Methods 0.000 claims abstract description 13
- 238000012937 correction Methods 0.000 claims abstract description 10
- 238000002372 labelling Methods 0.000 claims description 15
- 238000004590 computer program Methods 0.000 claims description 5
- 230000005855 radiation Effects 0.000 claims description 3
- 238000002347 injection Methods 0.000 abstract description 4
- 239000007924 injection Substances 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The application discloses a calibration method for high-precision measurement of signal amplitude, which aims at the high-precision amplitude measurement requirement of a front-end sensor receiving system on a target radar signal, and a stable-amplitude self-checking signal source is additionally arranged at the output end of an equipment antenna; the relay is switched, and the measurement amplitude value of the receiving channel is marked and stored once in a standard signal source injection mode; switching to a built-in self-checking signal source signal, and performing secondary marking and storage on the signal detection amplitude value of the channel in an injection mode to form an amplitude value marking table corresponding to the gain state of the receiving channel of the system; in the later working process of the system equipment, if an amplitude measurement precision error is generated due to factors such as maintenance, module replacement and the like, the self-checking source signal is only used for carrying out injection self-checking on the equipment, the signal amplitude value information marked before comparison is formed into a correction value, and finally, the measurement amplitude correction is carried out at the data processing end of the equipment, so that the high-precision measurement of the target signal amplitude by the receiving system is conveniently realized.
Description
Technical Field
The application belongs to the technical field of system detection in the field of comprehensive electronic information, and particularly relates to a calibration method for ensuring high-precision measurement of target signal parameters by sensor equipment.
Background
With the development of modern radar technology, the type of radar radiation signal is increasingly complex, so that in order to improve the capability of detecting and analyzing the signal, a front-end sensor receiving system faces higher and higher challenges, and especially, the accuracy of measuring signal parameters is very important. The current various front-end sensor receiving systems have non-uniform measurement standards for signal amplitude, have no higher requirements on measurement accuracy, and are generally controlled to be about 3 dB. Along with the long-term operation of the equipment or the operation of maintaining, replacing modules and the like, the measurement precision of the system to the target signal has more uncertain factors, and the measurement precision is inevitably deteriorated.
In order to keep the original measurement accuracy of the system, the traditional method needs to recalibrate the system through a standard signal source, and the operation brings a plurality of inconveniences and lacks timeliness; the existing disclosed calibration method is generally an amplitude calibration method with multi-channel amplitude consistency, has no higher requirement on measurement accuracy, and still cannot meet the requirement. Therefore, a novel real-time calibration method for high-precision measurement of signal amplitude is provided.
Disclosure of Invention
The application aims to solve the problems in the background technology, and provides a method for calibrating the amplitude value of the sensor equipment in real time by additionally arranging a small built-in stable-amplitude self-checking signal source at the front end of the sensor equipment to replace a conventional standard signal source and adopting an amplitude labeling comparison method.
In order to achieve the purpose of the application, the application discloses a calibration method for measuring signal amplitude with high precision, which comprises the following steps:
step 1, receiving a standard signal source signal by a control relay, and finishing primary marking and storage of a measured value of standard signal amplitude by sensor equipment;
step 2, receiving a self-checking signal source signal through a control relay, finishing secondary marking and storage of the sensor equipment on a measured value of the self-checking signal source signal amplitude, and then controlling the relay to receive a microwave radiation signal from an antenna;
and 3, when the system needs amplitude measurement calibration, enabling the equipment to receive the self-checking source signal again through controlling the relay, generating a correction value by comparing the detection value of the current self-checking signal with the previous secondary labeling value, and correcting at a data processing end, so that the instant and convenient measured value calibration capability of the sensor equipment is realized.
Further, in the step 1, the specific method for labeling the standard signal source once comprises the following steps: the relay is controlled to receive standard signal source signals through the comprehensive control instruction, the sensor equipment detects standard signal amplitude in each working frequency band, and the signal frequency range is the detection frequency range of the sensor equipment; and meanwhile, marking the amplitude of the detection signal according to the output power value of the standard signal source, so that the detection power value of the sensor equipment to the signal and the standard signal source keep a corresponding relation.
Further, in the step 2, signal detection amplitude values of the standard signal source and the self-checking source are respectively marked and stored in a mode of front end injection of the sensor equipment, so that an amplitude reference is provided for subsequent calibration.
Further, in the step 2, the specific method for secondary labeling of the stable-amplitude self-detection signal source comprises the following steps: the relay is controlled to receive the self-checking signal source signals through the comprehensive control instruction, the sensor equipment completes the detection of the self-checking signal amplitude in each working frequency band, the signal frequency range is the detection frequency range of the sensor equipment, and the signal frequency range is consistent with the setting frequency point of the standard signal source in the step 1; and recording the amplitude detection value of each self-checking signal by the sensor equipment, and carrying out secondary labeling and storage.
Further, step 3 is to compare the detection value with the previously stored labeling value to generate a correction value in the data processing unit through the additionally installed self-checking signal source, so that the novel instant and convenient measuring value quasi-real-time calibration capability of the sensor system is realized.
Further, in step 3, the specific method for calibrating the real-time measurement value is as follows: the relay is controlled to receive the self-checking signal source signals through the comprehensive control instruction, the sensor equipment completes the detection of the self-checking signal amplitude in each working frequency band, the signal frequency range is the detection frequency range of the sensor equipment, and the signal frequency range is consistent with the setting frequency point of the standard signal source in the step 1; recording the amplitude detection value of each self-checking signal by the sensor equipment, and comparing the amplitude detection value with the amplitude value stored by the secondary labeling in the step 2 to generate an amplitude value correction statistical table; the signal amplitude is then modified at the data processing end.
A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the steps of a calibration method for high accuracy measurement of signal amplitude.
A computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of a method of calibrating a high accuracy measurement of signal amplitude.
Compared with the prior art, the application has the remarkable progress that: by additionally installing a small built-in stable-amplitude self-checking signal source, the amplitude calibration flow and work of various equipment are simplified, the sensor equipment has instant and convenient amplitude measurement value calibration capability in a long-term service period, and the measurement accuracy of a system on target signal parameters is maintained.
In order to more clearly describe the functional characteristics and structural parameters of the present application, the following description is made with reference to the accompanying drawings and detailed description.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic block diagram of an amplitude measurement calibration;
FIG. 2 is a flow chart of wideband receive channel amplitude measurement calibration;
fig. 3 is a flow chart of narrowband receive channel amplitude measurement calibration.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application; all other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Examples
The working principle block diagram of the embodiment of the application is shown in fig. 1, and the step flow of the embodiment is shown in fig. 2 and 3. The flow of steps in the embodiments of the present application will be described below with reference to the accompanying drawings.
Embodiment one: the embodiment provides a real-time calibration method for high-precision measurement of signal amplitude of a broadband receiving channel.
Step 1: under the normal working state of the sensor equipment, the front end receives the standard source signal by controlling the relay, the signal amplitude value is set to be 0dBm, meanwhile, the output signal frequency of the standard source signal is kept synchronous with the working frequency band of the equipment, the amplitude detection of the standard signal under the corresponding frequency points (namely marking points) in the working frequency band of the equipment is completed, and the signal amplitude detection value is recorded as P i ＝[(f a +i△f),P i ](f a For the initial frequency in the working frequency band, Δf is the frequency step, P i I is the sequence number of the marking point, i=1, 2, 3 … … n, which is the signal amplitude measurement value of the corresponding frequency point. Then the signal amplitude value P i And storing the signal amplitude value at the data processing end according to the frequency point, thus completing one-time marking of the standard signal amplitude measured value by the sensor equipment.
Step 2: the front end receives the self-checking source signal by controlling the relay, and simultaneously the frequency of the self-checking source output signal is kept synchronous with the working frequency band of the equipment, so as to finish the amplitude detection of the self-checking signal in the working frequency band of the equipment corresponding to each frequency point in the step 1, and the amplitude of each signal is recorded as P j ＝[(f a +i△f),P j ](i, j=1, 2, 3 … … n) and then comparing the signal amplitude value P j And (3) carrying out secondary marking and storage on the signal amplitude value at the data processing end according to the frequency point, and controlling the relay to enable the front end to receive the antenna feed source signal, so that the system works normally.
Step 3: when the system needs to calibrate the amplitude measurement value, the system is switched on againThe over-control relay enables the front end to receive the self-checking source signal, simultaneously enables the frequency of the self-checking source output signal to keep synchronous with the working frequency band of the equipment, completes the amplitude detection of the self-checking signal in the working frequency band of the equipment corresponding to each frequency point in the step 1, and the amplitude of each signal is recorded as P k ＝[(f a +i△f),P j ](i, k=1, 2, 3 … … n) and then detecting a value P according to the amplitude of the current self-detected source signal k The amplitude detection secondary labeling value P of the corresponding frequency point in step 2 of the embodiment j Comparing to obtain the signal amplitude measurement calibration value DeltaP of the system marking point k ＝P k -P j -P i (i, j, k=1, 2, 3 … … n), then correcting the signal amplitude value through the data processing end to finish the measurement calibration of the amplitude value, and finally, the measurement output value of the signal is as follows:
P＝P'+△P k +(△P k+1 -△P k )×(f b -(f a +i△f))/△f
wherein:
p: measuring the amplitude of the signal after correction;
p': correcting the signal amplitude measurement value before correction;
△P k : the kth mark point signal amplitude measurement calibration value (k=1, 2, 3 … … n);
f i : the ith marked frequency point is in MHz (i=1, 2, 3 … … n);
f a : starting frequency in the working frequency band;
f b : frequency of the current measured signal, and f i ≤f b ≤f i+1 The unit is MHz;
Δf, the frequency of the marking point is stepped, and in this embodiment, 5MHz is taken, and the adjustment can be performed according to actual conditions.
Step 4: after the measured value is calibrated, the relay is controlled to enable the front end to receive the antenna feed source signal, so that the system works normally.
Embodiment two: the embodiment provides a real-time calibration method for high-precision measurement of signal amplitude of a narrow-band receiving channel, wherein the frequency point of the working center of the narrow-band receiving channel is fixed.
Step 1: under the normal working state of the sensor equipment, the front end receives the standard source signal by controlling the relay, the signal amplitude value is set to be 0dBm, and the output signal frequency of the standard source signal is synchronous with the central working frequency point of the narrow-band receiving channel of the equipment, so that the amplitude detection of the standard signal corresponding to each narrow-band receiving channel of the equipment is completed, and the amplitude detection value of each channel signal is recorded as P i ＝[f i ,P i ](f i For the center frequency of the narrow-band receiving channel, P i For signal amplitude measurement of the corresponding frequency point, i is the mark point or channel number, i=1, 2, 3 … … n). Then the signal amplitude value P i And storing the signal amplitude value at the data processing end according to the frequency point or the channel number, namely finishing one-time marking of the sensor equipment on the standard signal amplitude measured value.
Step 2: the front end receives the self-checking source signal by controlling the relay, and simultaneously the frequency of the self-checking source output signal is kept synchronous with the central working frequency point of the narrow-band receiving channel of the equipment, so as to finish the amplitude detection of the self-checking signals corresponding to the narrow-band receiving channels of the equipment, and the amplitude detection value of the signals of each channel is recorded as P j ＝[f i ,P j ](i, j=1, 2, 3 … … n) and then comparing the signal amplitude value P j And (3) carrying out secondary marking and storage on the signal amplitude value at the data processing end according to the marking point or the channel number, and controlling the relay to enable the front end to receive the antenna feed source signal, so that the system works normally.
Step 3: when the system needs to calibrate the amplitude measurement value, the front end receives the self-checking source signal through controlling the relay, and simultaneously, the frequency of the self-checking source output signal is kept synchronous with the central working frequency point of the narrow-band receiving channel of the equipment, so as to complete the amplitude detection of the self-checking signals corresponding to each narrow-band receiving channel of the equipment, and the amplitude of each signal is marked as P k ＝[f i ,P j ](i, k=1, 2, 3 … … n) and then detecting a value P according to the amplitude of the current self-detected source signal k Amplitude detection secondary labeling value P corresponding to labeling point or channel number in step 2 of this embodiment j Comparing to obtain the signal amplitude measurement calibration value DeltaP of the system marking point k ＝P k -P j -P i (i, j, k=1, 2, 3 … … n), then correcting the signal amplitude value through the data processing end to finish the measurement calibration of the amplitude value, and finally, the measurement output value of the signal is as follows:
P＝P'+△P k
wherein:
p: measuring an output value of the corrected signal amplitude;
p': correcting the signal amplitude measurement value before correction;
△P k : the kth mark point or channel number signal amplitude measurement calibration value (k=1, 2, 3 … … n);
step 4: after the measured value is calibrated, the relay is controlled to enable the front end to receive the antenna feed source signal, so that the system works normally.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The calibrating method for high-precision measurement of signal amplitude is characterized by comprising the following steps:
step 1, receiving a standard signal source signal by a control relay, and finishing primary marking and storage of a measured value of standard signal amplitude by sensor equipment;
step 2, receiving a self-checking signal source signal through a control relay, finishing secondary marking and storage of the sensor equipment on a measured value of the self-checking signal source signal amplitude, and then controlling the relay to receive a microwave radiation signal from an antenna;
and 3, when the system needs amplitude measurement calibration, enabling the equipment to receive the self-checking source signal again through controlling the relay, generating a correction value by comparing the detection value of the current self-checking signal with the previous secondary labeling value, and correcting at a data processing end, so that the instant and convenient measured value calibration capability of the sensor equipment is realized.
2. The method for calibrating high-precision measurement of signal amplitude according to claim 1, wherein in step 1, the specific method for labeling the standard signal source once is as follows: the relay is controlled to receive standard signal source signals through the comprehensive control instruction, the sensor equipment detects standard signal amplitude in each working frequency band, and the signal frequency range is the detection frequency range of the sensor equipment; and meanwhile, marking the amplitude of the detection signal according to the output power value of the standard signal source, so that the detection power value of the sensor equipment to the signal and the standard signal source keep a corresponding relation.
3. The method according to claim 1, wherein the step 2 marks and stores the detected amplitude values of the standard signal source and the self-checking source by injecting into the front end of the sensor device, and provides an amplitude reference for subsequent calibration.
4. A method for calibrating high-precision measurement of signal amplitude according to claim 1 or 3, wherein in step 2, the specific method for secondary labeling of the stable-amplitude self-checking signal source is as follows: the relay is controlled to receive the self-checking signal source signals through the comprehensive control instruction, the sensor equipment completes the detection of the self-checking signal amplitude in each working frequency band, the signal frequency range is the detection frequency range of the sensor equipment, and the signal frequency range is consistent with the setting frequency point of the standard signal source in the step 1; and recording the amplitude detection value of each self-checking signal by the sensor equipment, and carrying out secondary labeling and storage.
5. The method according to claim 1, wherein the step 3 is characterized in that a data processing unit compares the detected value with a previously stored marked value to generate a corrected value by using an additionally installed self-checking signal source, so as to realize a novel instant and convenient measurement value quasi-real-time calibration capability of the sensor system.
6. The method for calibrating high-precision measurement of signal amplitude according to claim 1 or 5, wherein in step 3, the specific method for calibrating the real-time measurement value is as follows: the relay is controlled to receive the self-checking signal source signals through the comprehensive control instruction, the sensor equipment completes the detection of the self-checking signal amplitude in each working frequency band, the signal frequency range is the detection frequency range of the sensor equipment, and the signal frequency range is consistent with the setting frequency point of the standard signal source in the step 1; recording the amplitude detection value of each self-checking signal by the sensor equipment, and comparing the amplitude detection value with the amplitude value stored by the secondary labeling in the step 2 to generate an amplitude value correction statistical table; the signal amplitude is then modified at the data processing end.
7. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 6 when the computer program is executed by the processor.
8. A computer readable storage medium having stored thereon a computer program, characterized in that the computer Cheng Ju, when executed by a processor, implements the steps of the method of any of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310946799.2A CN117111003A (en) | 2023-07-31 | 2023-07-31 | Calibration method for high-precision measurement of signal amplitude |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310946799.2A CN117111003A (en) | 2023-07-31 | 2023-07-31 | Calibration method for high-precision measurement of signal amplitude |
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| CN202310946799.2A Pending CN117111003A (en) | 2023-07-31 | 2023-07-31 | Calibration method for high-precision measurement of signal amplitude |
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