CN104360420A - Method for detecting interference signal of sensor and automotive rainfall amount illumination sensor - Google Patents
Method for detecting interference signal of sensor and automotive rainfall amount illumination sensor Download PDFInfo
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- CN104360420A CN104360420A CN201410743472.6A CN201410743472A CN104360420A CN 104360420 A CN104360420 A CN 104360420A CN 201410743472 A CN201410743472 A CN 201410743472A CN 104360420 A CN104360420 A CN 104360420A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01W—METEOROLOGY
- G01W1/00—Meteorology
- G01W1/02—Instruments for indicating weather conditions by measuring two or more variables, e.g. humidity, pressure, temperature, cloud cover or wind speed
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01W—METEOROLOGY
- G01W1/00—Meteorology
- G01W1/14—Rainfall or precipitation gauges
Abstract
The embodiment of the invention discloses a method for detecting an interference signal of a sensor and an automotive rainfall amount illumination sensor. A first infrared receiving apparatus and a second infrared receiving apparatus in a rainfall amount sensing module are used for receiving all reflected infrared rays and converting the received reflected infrared rays into corresponding first voltage signal and second voltage signal; and a signal processing module is used for obtaining the first voltage signal and the second voltage signal, and performing differential treatment on the first voltage signal and the second voltage signal to obtain the interference signal. According to the method for detecting the interference signal of the sensor and the automobile rainfall amount illumination sensor disclosed by the invention, the interference signal of the sensor can be obtained by performing the differential treatment on the first voltage signal and the second voltage signal.
Description
Technical field
The present invention relates to differential circuit technical field, more particularly, relate to a kind of method of detecting sensor undesired signal and automobile-used rainfall optical sensor.
Background technology
Automobile-used rainfall optical sensor can detect the information such as external environment rainfall amount, ambient light, front windshield temperature and terrestrial solar radiation intensity, realizes the realization of automatic wiper and automatic light and some other subsidiary function by analyzing these information.
Present stage, rainfall optical sensor mostly is photo-electric, comprises rainfall perception part and surround lighting detecting portion, and wherein, rainfall perception part is primarily of part compositions such as infrared transmitting tube, infrared receiving tube and sense rain optical textures.Infrared transmitting tube launches infrared-ray, and after conduction light path, infrared-ray arrives front windshield surface, when glass there being attachment, can change the volume reflection of infrared-ray, thus realizes the detection to rainfall.Such as, but when running into special circumstances, the situations such as fog condensation, dust attachment, can change the infrared-ray total amount that infrared receiving tube receives, disturb sensor, to the detection of rainfall, causes rainfall detection ability to decline.
Therefore, external environment is detected to the interference of rainfall ability to sensor, how detecting sensor interference unit signal becomes the problem needing to solve.
Summary of the invention
The object of the present invention is to provide a kind of method of detecting sensor undesired signal and automobile-used rainfall optical sensor, the undesired signal of detecting sensor can be realized.
For achieving the above object, following technical scheme is embodiments provided:
A method for detecting sensor undesired signal, comprising:
The first infrared receiver device in rainfall sensing module and the second infrared receiver device, by the volume reflection of receiving infrared-ray, are converted into corresponding first voltage signal and the second voltage signal and send signal processing module to;
Described signal processing module receives described first voltage signal and described second voltage signal, and carries out differential process to described first voltage signal and described second voltage signal, obtains undesired signal;
Described undesired signal is separated into DC influence signal and AC influence signal by described signal processing module, and described DC influence signal and AC influence signal are passed to processor;
Described processor utilizes described DC influence signal and AC influence signal as auxiliary parameter, judges chaff interference information.
Preferably, described signal processing module carries out differential process to described first voltage signal and described second voltage signal, obtains undesired signal, comprising:
The common-mode signal that described signal processing module is removed in described first voltage signal obtains the first interference voltage signal, removes the common-mode signal in described second voltage signal, obtains the second interference voltage signal;
Described signal processing module obtains described undesired signal to described first interference voltage signal and described second interference voltage Signal averaging.
Preferably, described undesired signal is separated into DC influence signal and AC influence signal by described signal processing module, comprising:
Described in inductance process in described signal processing module, undesired signal obtains direct current signal;
Described in electric capacity process in described signal processing module, undesired signal obtains AC signal;
Direct current processor in described signal processing module carries out filtering to described direct current signal and amplification obtains DC influence signal;
Interchange processor in described signal processing module carries out filtering to described AC signal and amplification obtains AC influence signal.
Preferably, described processor utilizes described DC influence signal and described AC influence signal to judge chaff interference information, comprising:
If described processor gets described DC influence signal from described signal processing module, then described processor determines that described undesired signal is the undesired signal that static chaff interference produces;
If described processor gets described AC influence signal from described signal processing module, then described processor determines that described undesired signal is the undesired signal of the chaff interference generation of motion.
A kind of automobile-used rainfall optical sensor, comprising:
Rainfall sensing module, for the volume reflection of receiving infrared-ray, and is transformed into corresponding first voltage signal and the second voltage signal by the first infrared receiver device in rainfall sensing module and the second infrared receiver device;
The signal processing module be connected with described rainfall sensing module, for obtaining described first voltage signal and described second voltage signal, and carries out differential process to described first voltage signal and described second voltage signal, obtains undesired signal; By described signal processing module, described undesired signal is separated into DC influence signal and AC influence signal again;
The processor be connected with described signal processing module, for obtaining described DC influence signal and AC influence signal, and utilizing described DC influence signal and AC influence signal as auxiliary parameter, judging chaff interference information.
Preferably, described signal processing module comprises:
The differential amplifier be connected with described rainfall sensing module, obtains the first interference voltage signal for the common-mode signal removed in described first voltage signal, removes the common-mode signal in described second voltage signal, obtain the second interference voltage signal; And described undesired signal is obtained to described first interference voltage signal and described second interference voltage Signal averaging;
The inductance be connected with described differential amplifier, for obtaining described undesired signal, and extracts direct current signal from described undesired signal;
The direct current processor be connected with described inductance, for obtaining described direct current signal, and carries out filter and amplification to described direct current signal, obtains described DC influence signal;
The electric capacity be connected with described differential amplifier, for obtaining described undesired signal, and extracts AC signal from described undesired signal;
What be connected with described electric capacity exchanges processor, for obtaining described AC signal, and carrying out filter and amplification to described AC signal, obtaining described AC influence signal.
Preferably, described processor utilizes described DC influence signal and AC influence signal as auxiliary parameter, when chaff interference information is judged, specifically for:
If described processor gets described DC influence signal, then described processor determines that described undesired signal is the undesired signal that static chaff interference produces;
If described processor gets described AC influence signal, then described processor determines that described undesired signal is the undesired signal of the chaff interference generation of motion
Known by above scheme, the method of a kind of detecting sensor undesired signal that the embodiment of the present invention provides and automobile-used rainfall optical sensor, the first infrared receiver device wherein in rainfall sensing module and the total amount of the second infrared receiver device to reflected infrared receive, and are transformed into corresponding first voltage signal and the second voltage signal; Signal processing module obtains the first voltage signal and the second voltage signal, and carries out differential process to the first voltage signal and the second voltage signal, obtains undesired signal.Visible, the method for a kind of detecting sensor undesired signal that the embodiment of the present invention provides and automobile-used rainfall optical sensor, by the differential process to the first voltage signal and the second voltage signal, can obtain the undesired signal of sensor.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of detecting sensor undesired signal method flow diagram disclosed in the embodiment of the present invention;
Fig. 2 is a kind of automobile-used rainfall optical sensor structural representation disclosed in the embodiment of the present invention;
Fig. 3 is another kind of automobile-used rainfall optical sensor structural representation disclosed in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the invention discloses a kind of method of detecting sensor undesired signal, the undesired signal of sensor can be obtained.
See Fig. 1, the method for a kind of detecting sensor undesired signal that the embodiment of the present invention provides, comprising:
The first infrared receiver device in S11, rainfall sensing module and the second infrared receiver device, by the volume reflection of receiving infrared-ray, are converted into corresponding first voltage signal and the second voltage signal and send signal processing module to;
Concrete, automobile-used rainfall optical sensor (RLS, Rain Light Sensor) information such as external environment rainfall amount, ambient light, front windshield temperature and terrestrial solar radiation intensity can be detected, the realization of automatic wiper and automatic light and some other subsidiary function is realized by analyzing these information.
Present stage, RLS mostly is photo-electric, comprises rainfall perception part and surround lighting detecting portion, and wherein rainfall sensing module is made up of parts such as infrared transmitting tube, infrared receiving tube and sense rain optical textures.Main way of realization has two kinds: one, single-shot list is received, and namely a power valve correspond to a receiving tube; Two, single-emission and double-receiving, namely a power valve correspond to two receiving tubes.
The present embodiment adopts the second way of realization, infrared transmitting tube launches two-way infrared-ray, after conduction light path, infrared-ray arrives front windshield surface, when glass there being attachment, the volume reflection of infrared-ray can be changed, the volume reflection of the first infrared receiver device and the second infrared receiver device receiving infrared-ray, and be converted into corresponding first voltage signal and the second voltage signal and send signal processing module to.
S12, signal processing module receive the first voltage signal and the second voltage signal, and carry out differential process to the first voltage signal and the second voltage signal, obtain undesired signal;
Concrete, the first voltage signal that the differential amplifier reception rainfall sensing module in signal processing module transmits and the second voltage signal, and differential process is carried out to the first voltage signal and the second voltage signal, obtain undesired signal.
Undesired signal is separated into DC influence signal and AC influence signal by S13, signal processing module, and DC influence signal and AC influence signal are passed to processor;
Concrete, chaff interference is likely the chaff interference of the static state such as fog condensation, dust attachment on glass, is also likely some dynamic chaff interferences; In order to allow processor judge the information of chaff interference more accurately, so signal processor has done further process to undesired signal, undesired signal is separated into DC influence signal and AC influence signal.
S14, processor utilize described DC influence signal and AC influence signal as auxiliary parameter, judge chaff interference information.
Concrete, processor is DC influence signal or AC influence signal according to analyzing what receive, chaff interference information is judged, thus when judging rainfall information as a reference, never chaff interference is removed to the interference of rainfall perceptional function, and time in actual applications, selection processor can be considered according to functional requirement and cost.
The method of a kind of detecting sensor undesired signal that the embodiment of the present invention provides, the first infrared receiver device wherein in rainfall sensing module and the total amount of the second infrared receiver device to reflected infrared receive, and are transformed into corresponding first voltage signal and the second voltage signal; Signal processing module obtains the first voltage signal and the second voltage signal, and carries out differential process to the first voltage signal and the second voltage signal, obtains undesired signal.Visible, the method for a kind of detecting sensor undesired signal that the embodiment of the present invention provides, by the differential process to the first voltage signal and the second voltage signal, can obtain the undesired signal of sensor.
In order to obtain undesired signal, signal processing module carries out differential process to the first voltage signal and the second voltage signal, comprising:
The signal processing module common-mode signal removed in the first voltage signal obtains the first interference voltage signal, removes the common-mode signal in the second voltage signal, obtains the second interference voltage signal;
Signal processing module obtains undesired signal to the first interference voltage signal and the second interference voltage Signal averaging.
Concrete, first voltage signal comprises the first interference voltage signal and the first rainfall perceptual signal, comprise the second interference voltage signal and the second rainfall perceptual signal in second voltage signal, wherein the first rainfall perceptual signal and the second rainfall perceptual signal belong to common-mode signal.
Concrete, the first rainfall perceptual signal that differential amplifier in signal processing module is removed in the first voltage signal obtains the first interference voltage signal, the the second rainfall perceptual signal removed in the second voltage signal obtains the second interference voltage signal, and obtains undesired signal to the first interference voltage signal and the second interference voltage Signal averaging.
In order to undesired signal being separated into DC influence signal and AC influence signal, undesired signal is separated into DC influence signal and AC influence signal by described signal processing module, comprising:
Inductance process undesired signal in signal processing module obtains direct current signal;
Electric capacity process undesired signal in signal processing module obtains AC signal;
Direct current processor in signal processing module carries out filtering to direct current signal and amplification obtains DC influence signal;
Interchange processor in signal processing module carries out filtering to AC signal and amplification obtains AC influence signal.
Concrete, differential amplifier passes to inductance in signal processing module and electric capacity undesired signal; The characteristic that inductance has prevention alternating current to pass through and allows direct current pass through smoothly, the characteristic that electric capacity has prevention direct current to pass through and allows alternating current pass through smoothly; So undesired signal is by after inductance, obtains direct current signal, after electric capacity, obtain AC signal.
Concrete, direct current processor has the function of filtering and amplification with exchanging processor, the direct current signal obtained by inductance and electric capacity and AC signal are utilized direct current processor and exchange processor and carry out filtering and amplification, wherein filtering can unwanted signal in filtering direct current signal and AC signal, required signal retained and amplifies, passing to processor.
In order to obtain chaff interference information, processor utilizes DC influence signal and AC influence signal to judge chaff interference information, comprising:
If processor gets DC influence signal from signal processing module, then processor determination undesired signal is the undesired signal that static chaff interference produces;
If processor gets AC influence signal from signal processing module, then processor determination undesired signal is the undesired signal of the chaff interference generation of motion.
Concrete, when chaff interference is static chaff interference, the volume reflection of the first infrared receiver device and the second infrared receiver device receiving infrared-ray is fixed value, and the electric signal produced is direct current signal; Otherwise, when chaff interference is the chaff interference of motion, the volume reflection of the first infrared receiver device and the second infrared receiver device receiving infrared-ray is what change, then the first voltage signal and the second voltage signal change accordingly along with the change of light, so the electric signal that the first infrared receiver device and the second infrared receiver device produce is AC signal.
See Fig. 2, the automobile-used rainfall optical sensor of the one that the embodiment of the present invention provides, comprising:
Rainfall sensing module 11, for the volume reflection of receiving infrared-ray, and is transformed into corresponding first voltage signal and the second voltage signal by the first infrared receiver device in rainfall sensing module 11 and the second infrared receiver device;
Concrete, automobile-used rainfall optical sensor (RLS, Rain Light Sensor) information such as external environment rainfall amount, ambient light, front windshield temperature and terrestrial solar radiation intensity can be detected, the realization of automatic wiper and automatic light and some other subsidiary function is realized by analyzing these information.
Present stage, RLS mostly is photo-electric, comprises rainfall perception part and surround lighting detecting portion, and wherein rainfall sensing module is made up of parts such as infrared transmitting tube, infrared receiving tube and sense rain optical textures.Main way of realization has two kinds: one, single-shot list is received, and namely a power valve correspond to a receiving tube; Two, single-emission and double-receiving, namely a power valve correspond to two receiving tubes.
The present embodiment adopts the second way of realization, infrared transmitting tube launches two-way infrared-ray, after conduction light path, infrared-ray arrives front windshield surface, when glass there being attachment, the volume reflection of infrared-ray can be changed, the volume reflection of the first infrared receiver device and the second infrared receiver device receiving infrared-ray, and be converted into corresponding first voltage signal and the second voltage signal and send signal processing module 12 to.
The signal processing module 12 be connected with rainfall sensing module 11, for obtaining the first voltage signal and the second voltage signal, and carries out differential process to the first voltage signal and the second voltage signal, obtains undesired signal; By signal processing module 11, undesired signal is separated into DC influence signal and AC influence signal again;
Concrete, the first voltage signal that the differential amplifier reception rainfall sensing module 11 in signal processing module 12 transmits and the second voltage signal, and differential process is carried out to the first voltage signal and the second voltage signal, obtain undesired signal.
Concrete, chaff interference is likely the chaff interference of the static state such as fog condensation, dust attachment on glass, is also likely some dynamic chaff interferences; In order to allow processor 13 judge the information of chaff interference more accurately, so signal processor 12 pairs of undesired signals have done further process, undesired signal is separated into DC influence signal and AC influence signal.
The processor 13 be connected with signal processing module 12, for obtaining DC influence signal and AC influence signal, and utilizing DC influence signal and AC influence signal as auxiliary parameter, judging chaff interference information.
Concrete, processor 13 is DC influence signal or AC influence signal according to analyzing what receive, chaff interference information is judged, thus when judging rainfall information as a reference, never chaff interference is removed to the interference of rainfall perceptional function, and time in actual applications, selection processor can be considered according to functional requirement and cost.
The automobile-used rainfall optical sensor of the one that the embodiment of the present invention provides, the first infrared receiver device wherein in rainfall sensing module 11 and the total amount of the second infrared receiver device to reflected infrared receive, and are transformed into corresponding first voltage signal and the second voltage signal; Signal processing module 12 obtains the first voltage signal and the second voltage signal, and carries out differential process to the first voltage signal and the second voltage signal, obtains undesired signal.Visible, the automobile-used rainfall optical sensor of the one that the embodiment of the present invention provides, by the differential process to the first voltage signal and the second voltage signal, can obtain the undesired signal of sensor.
See Fig. 3, in the automobile-used rainfall optical sensor of another kind provided by the invention, comprising:
First infrared receiver device 21 and the second infrared receiver device 22, for the volume reflection of receiving infrared-ray, and is transformed into corresponding first voltage signal and the second voltage signal;
The differential amplifier 23 be connected with the second infrared receiver device 22 with the first infrared receiver device 21, the first interference voltage signal is obtained for the common-mode signal removed in the first voltage signal, remove the common-mode signal in the second voltage signal, obtain the second interference voltage signal; And undesired signal is obtained to the first interference voltage signal and the second interference voltage Signal averaging;
The inductance 24 be connected with differential amplifier 23, for obtaining undesired signal, and extracts direct current signal from undesired signal;
The direct current processor 26 be connected with inductance 24, for obtaining direct current signal, and carrying out filter and amplification to direct current signal, obtaining DC influence signal;
The electric capacity 25 be connected with differential amplifier 23, for obtaining undesired signal, and extracts AC signal from undesired signal;
What be connected with electric capacity 25 exchanges processor 27, for obtaining AC signal, and carrying out filter and amplification to AC signal, obtaining AC influence signal.
The processor 28 connected with exchanging processor 27 with direct current processor 26, for obtaining DC influence signal and AC influence signal, and utilizing DC influence signal and AC influence signal as auxiliary parameter, judging chaff interference information.
Concrete, first voltage signal comprises the first interference voltage signal and the first rainfall perceptual signal, comprise the second interference voltage signal and the second rainfall perceptual signal in second voltage signal, wherein the first rainfall perceptual signal and the second rainfall perceptual signal belong to common-mode signal.
Concrete, the first rainfall perceptual signal that differential amplifier 23 in signal processing module 12 is removed in the first voltage signal obtains the first interference voltage signal, the the second rainfall perceptual signal removed in the second voltage signal obtains the second interference voltage signal, and obtains undesired signal to the first interference voltage signal and the second interference voltage Signal averaging.
Concrete, the characteristic that inductance 24 has prevention alternating current to pass through and allows direct current pass through smoothly, the characteristic that electric capacity 25 has prevention direct current to pass through and allows alternating current pass through smoothly; So undesired signal is by after inductance 24, obtains direct current signal, after electric capacity 25, obtain AC signal.
Concrete, direct current processor 26 has the function of filtering and amplification with exchanging processor 27, the direct current signal obtained by inductance 24 and electric capacity 25 and AC signal are utilized direct current processor 26 and exchange processor 27 and carry out filtering and amplification, wherein filtering can unwanted signal in filtering direct current signal and AC signal, required signal retained and amplifies, passing to processor 28.
Preferably, in another embodiment of the invention, processor 13 utilizes DC influence signal and AC influence signal as auxiliary parameter, when chaff interference information is judged, specifically for:
If processor 13 gets DC influence signal, then processor 13 determines that undesired signal is the undesired signal that static chaff interference produces;
If processor 13 gets AC influence signal, then processor 13 determines that undesired signal is the undesired signal of the chaff interference generation of motion.
Concrete, when chaff interference is static chaff interference, the volume reflection of the first infrared receiver device 21 and the second infrared receiver device 22 receiving infrared-ray is fixed value, and the electric signal produced is direct current signal; Otherwise, when chaff interference is the chaff interference of motion, the volume reflection of the first infrared receiver device 21 and the second infrared receiver device 22 receiving infrared-ray is what change, then electric signal changes accordingly along with the change of light, so the electric signal that the first infrared receiver device 21 and the second infrared receiver device 22 produce is AC signal.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. a method for detecting sensor undesired signal, is characterized in that, comprising:
The first infrared receiver device in rainfall sensing module and the second infrared receiver device, by the volume reflection of receiving infrared-ray, are converted into corresponding first voltage signal and the second voltage signal and send signal processing module to;
Described signal processing module receives described first voltage signal and described second voltage signal, and carries out differential process to described first voltage signal and described second voltage signal, obtains undesired signal;
Described undesired signal is separated into DC influence signal and AC influence signal by described signal processing module, and described DC influence signal and AC influence signal are passed to processor;
Described processor utilizes described DC influence signal and AC influence signal as auxiliary parameter, judges chaff interference information.
2. method according to claim 1, is characterized in that, described signal processing module carries out differential process to described first voltage signal and described second voltage signal, obtains undesired signal, comprising:
The common-mode signal that described signal processing module is removed in described first voltage signal obtains the first interference voltage signal, removes the common-mode signal in described second voltage signal, obtains the second interference voltage signal;
Described signal processing module obtains described undesired signal to described first interference voltage signal and described second interference voltage Signal averaging.
3. method according to claim 1, is characterized in that, described undesired signal is separated into DC influence signal and AC influence signal by described signal processing module, comprising:
Described in inductance process in described signal processing module, undesired signal obtains direct current signal;
Described in electric capacity process in described signal processing module, undesired signal obtains AC signal;
Direct current processor in described signal processing module carries out filtering to described direct current signal and amplification obtains DC influence signal;
Interchange processor in described signal processing module carries out filtering to described AC signal and amplification obtains AC influence signal.
4. method according to claim 1, is characterized in that, described processor utilizes described DC influence signal and described AC influence signal to judge chaff interference information, comprising:
If described processor gets described DC influence signal from described signal processing module, then described processor determines that described undesired signal is the undesired signal that static chaff interference produces;
If described processor gets described AC influence signal from described signal processing module, then described processor determines that described undesired signal is the undesired signal of the chaff interference generation of motion.
5. an automobile-used rainfall optical sensor, is characterized in that, comprising:
Rainfall sensing module, for the volume reflection of receiving infrared-ray, and is transformed into corresponding first voltage signal and the second voltage signal by the first infrared receiver device in rainfall sensing module and the second infrared receiver device;
The signal processing module be connected with described rainfall sensing module, for obtaining described first voltage signal and described second voltage signal, and carries out differential process to described first voltage signal and described second voltage signal, obtains undesired signal; By described signal processing module, described undesired signal is separated into DC influence signal and AC influence signal again;
The processor be connected with described signal processing module, for obtaining described DC influence signal and AC influence signal, and utilizing described DC influence signal and AC influence signal as auxiliary parameter, judging chaff interference information.
6. sensor according to claim 5, is characterized in that, described signal processing module comprises:
The differential amplifier be connected with described rainfall sensing module, obtains the first interference voltage signal for the common-mode signal removed in described first voltage signal, removes the common-mode signal in described second voltage signal, obtain the second interference voltage signal; And described undesired signal is obtained to described first interference voltage signal and described second interference voltage Signal averaging;
The inductance be connected with described differential amplifier, for obtaining described undesired signal, and extracts direct current signal from described undesired signal;
The direct current processor be connected with described inductance, for obtaining described direct current signal, and carries out filter and amplification to described direct current signal, obtains described DC influence signal;
The electric capacity be connected with described differential amplifier, for obtaining described undesired signal, and extracts AC signal from described undesired signal;
What be connected with described electric capacity exchanges processor, for obtaining described AC signal, and carrying out filter and amplification to described AC signal, obtaining described AC influence signal.
7. sensor according to claim 5, is characterized in that, described processor utilizes described DC influence signal and AC influence signal as auxiliary parameter, when chaff interference information is judged, specifically for:
If described processor gets described DC influence signal, then described processor determines that described undesired signal is the undesired signal that static chaff interference produces;
If described processor gets described AC influence signal, then described processor determines that described undesired signal is the undesired signal of the chaff interference generation of motion.
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