CN204926373U - Utilize light wave doppler effect's invasion detection system - Google Patents
Utilize light wave doppler effect's invasion detection system Download PDFInfo
- Publication number
- CN204926373U CN204926373U CN201520711185.7U CN201520711185U CN204926373U CN 204926373 U CN204926373 U CN 204926373U CN 201520711185 U CN201520711185 U CN 201520711185U CN 204926373 U CN204926373 U CN 204926373U
- Authority
- CN
- China
- Prior art keywords
- signal
- infrared
- operational amplifier
- resistance
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Burglar Alarm Systems (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The utility model provides an utilize light wave doppler effect's invasion detection system, utilize light wave doppler effect's invasion detection system includes: infrared transmission module, infrared receiver module, signal processing module and alarm module. The utility model discloses an utilize light wave doppler effect's invasion detection system utilizes doppler effect, confirms the invasion action through the method of judging relative motion. Change (temperature, humidity, illumination) by natural environment and can not disturb the relative motion production infrared wave's physics influence, and because infrared wave's radiation range is great, guaranteed detection range and detection angle. Therefore, the utility model provides a traditional initiative infrared, passively invasion detectors such as infrared, microwave, ultrasonic wave influenced by natural environment great, easily disturbed, the misstatement rate is high and fail to report the scheduling problem.
Description
Technical field
This real utility model relates to electric detective technology field, particularly relates to a kind of intruder detection system utilizing light wave Doppler effect.
Background technology
Security system relates to multiple fields such as army, bank, museum, industrial and mining enterprises, family, and intrusion detector is then the main device of this system.
At present, the intrusion detection safety alarm device generally used both at home and abroad is by active infrared, passive infrared, ultrasound wave, microwave and two compound intrusion detectors etc. that reflect of being made up of passive infrared and microwave.
Above-mentioned intrusion detector is due to technically intrinsic defect, thus limit environment for use, it is made to have limitation, such as passive type infrared detection device, its detection method is the heat radiation detecting human body in certain anti-norm space, because human surface temperature and ambient temperature exist difference, so when human motion, the change that this difference produces can be detected by infrared sensor, thus triggered alarm.Passive type infrared acquisition method is easily disturbed by various thermal source, lamp, when environment temperature and human body temperature close to time, detection and the sensitivity of passive type infrared detection device obviously decline, and sometimes cause and lose efficacy in short-term.Active infrared detection device is made up of infrared transmitter and receiver, produce alerting signal when infrared pulse light beam between transmitter and receiver is blocked or blocks, active infra-red warning device warning accuracy rate is very easily by natural environment influence (illumination, dust storm, rain) and and the restriction of mounting condition.The transmitting-receiving of microwave detector signal is reliable and stable, but microwave is strong due to penetrability, be subject to external interference, and microwave sounding angle is corresponding less, is generally less than miter angle.Two mirror compound intrusion detector is in fact that infrared detection device is combined application with microwave sounding unit, MSU, does not fundamentally solve the limitation of these two kinds of sniffers.
Visible, the Intrusion Detection Alarm technology used now to exist by natural environment influence more greatly, easy disturbed, the technical inherent shortcoming such as rate of false alarm is high and fail to report.
Utility model content
The purpose of this utility model is to provide a kind of intruder detection system utilizing light wave Doppler effect, to solve the problem.
The described intruder detection system utilizing light wave Doppler effect, comprising:
Infrared transmission module, described infrared transmission module is used for launching infrared waves signal to surveyed area;
Infrared receiving module, described infrared waves signal for receiving the infrared waves signal in described surveyed area, and is converted to initialize signal by described infrared receiving module;
Signal processing module, described signal processing module is connected with described infrared receiving module, for receiving described initialize signal, and processes described initialize signal, produces sampled voltage;
Alarm module, described alarm module is connected with described signal processing module, for receiving described sampled voltage, and described sampled voltage is amplified, sampled voltage after amplification and reference voltage are compared, when described sampled voltage is greater than reference voltage, reports to the police.
In technique scheme, the intruder detection system of what the utility model provided utilize light wave Doppler effect, comprising: infrared transmission module, infrared receiving module, signal processing module and alarm module.
Infrared transmission module launches infrared waves signal in surveyed area, receives the infrared waves signal in surveyed area simultaneously and be converted to initialize signal by infrared receiving module.Signal processing module carries out process to described initial number and produces sampled voltage, namely when not occurring that personnel invade situation in surveyed area, owing to there is not the relative motion of object relative to infrared waves, so there is no Doppler shift, the infrared waves signal that infrared receiving module receives is more stable, the initialize signal that conversion produces is corresponding more stable, and the sampled voltage generated after signal processing module process is fixing initial value, does not carry out alarm response; When there being personnel to invade situation in surveyed area, because the infrared waves of invasion personnel and transmitting forms relative motion and causes the appearance of Doppler shift, make the initialize signal after infrared receiving module process that synchronous change occur, the sampled voltage generated after signal processing module process is synchronous changing value.After alarm module receives described sampled voltage, described sampled voltage is amplified, compared, if described sampled voltage is greater than reference voltage, then report to the police.
The intruder detection system of light wave Doppler effect that utilizes disclosed in the utility model utilizes Doppler effect, by judging that the method for relative motion determines intrusion behavior.Interference can not be produced to relative motion by Environmental variations (temperature, humidity, illumination) to the physical influence of infrared waves, and due to the radiation scope of infrared waves comparatively large, ensure that detection range and detection angle.Therefore, disclosed in the utility model to utilize the intruder detection system of light wave Doppler effect to solve the intrusion detectors such as traditional active infrared, passive infrared, microwave, ultrasound wave comparatively large by natural environment influence, easily disturbed, the problem such as rate of false alarm is high and fail to report.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in the utility model embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those skilled in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
A kind of intruder detection system schematic diagram utilizing light wave Doppler effect that Fig. 1 provides for the utility model;
The signal processing module schematic diagram that Fig. 2 provides for the utility model;
The dynamic error computing circuit schematic diagram that Fig. 3 provides for the utility model.
In figure: R1, the first resistance, R2, the second resistance, R3, the 3rd resistance, R4, the 4th resistance, R5, the 5th resistance, OA1, the first operational amplifier, OA2, the second operational amplifier, OA3, the 3rd operational amplifier, OA4, four-operational amplifier, C, direct earth capacitance.
Embodiment
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The Intrusion Detection Alarm technology ubiquity of present use by natural environment influence more greatly, easy disturbed, the problem such as rate of false alarm is high and fail to report.
Discovery is studied through inventor, application light wave Doppler effect principle, by judging whether to there is Doppler shift, the personnel that determined whether invade, and can avoid traditional infrared intrusion detection method easily disturbed, the shortcoming that comparatively large by natural environment influence, rate of false alarm is high.Meanwhile, select infrared waves as detectable signal, traditional microwave intrusion detection method can be solved easily disturbed with investigative range confinement problems.
Based on this, the utility model embodiment discloses a kind of intruder detection system utilizing light wave Doppler effect, and as shown in Figure 1, the described intruder detection system utilizing light wave Doppler effect, comprising:
Infrared transmission module, described infrared transmission module is used for launching infrared waves signal to surveyed area;
Infrared receiving module, described infrared waves signal for receiving the infrared waves signal in described surveyed area, and is converted to initialize signal by described infrared receiving module;
Signal processing module, described signal processing module is connected with described infrared receiving module, for receiving described initialize signal, and processes described initialize signal, produces sampled voltage;
Alarm module, described alarm module is connected with described signal processing module, for receiving described sampled voltage, and described sampled voltage is amplified, sampled voltage after amplification and reference voltage are compared, when described sampled voltage is greater than reference voltage, reports to the police.
Disclosed in the utility model utilize the intruder detection system work of light wave Doppler effect in, infrared transmission module launches infrared waves signal in surveyed area, receives the infrared waves signal in surveyed area simultaneously and be converted to initialize signal by infrared receiving module.Signal processing module carries out process to described initial number and produces sampled voltage, namely when not occurring that personnel invade situation in surveyed area, owing to there is not the relative motion of object relative to infrared waves, so there is no Doppler shift, the infrared waves signal that infrared receiving module receives is more stable, the initialize signal that conversion produces is corresponding more stable, and the sampled voltage generated after signal processing module process is fixing initial value, does not carry out alarm response; When there being personnel to invade situation in surveyed area, because the infrared waves of invasion personnel and transmitting forms relative motion and causes the appearance of Doppler shift, make the initialize signal after infrared receiving module process that synchronous change occur, the sampled voltage generated after signal processing module process is synchronous changing value.After alarm module receives described sampled voltage, described sampled voltage is amplified, compared, if described sampled voltage is greater than reference voltage, then report to the police.
The intruder detection system of light wave Doppler effect that utilizes disclosed in the utility model utilizes Doppler effect, by judging that the method for relative motion determines intrusion behavior.Interference can not be produced to relative motion by Environmental variations (temperature, humidity, illumination) to the physical influence of infrared waves, and due to the radiation scope of infrared waves comparatively large, ensure that detection range and detection angle.Therefore, disclosed in the utility model to utilize the intruder detection system of light wave Doppler effect to solve the intrusion detectors such as traditional active infrared, passive infrared, microwave, ultrasound wave comparatively large by natural environment influence, easily disturbed, the problem such as rate of false alarm is high and fail to report.
Wherein, described infrared transmission module, comprising:
Infrared-emitting diode, described infrared-emitting diode is for launching infrared waves signal;
Oscillatory circuit, described oscillatory circuit is connected with described infrared-emitting diode, for the transmission frequency of fixing described infrared waves signal.
Described infrared receiving module, comprising:
Infrared receiving diode, described infrared receiving diode is for receiving the infrared waves signal in described surveyed area;
Photoelectric switching circuit, described photoelectric switching circuit is connected with described infrared receiving diode, for described infrared waves signal is converted to initialize signal.
As shown in Figure 2, described signal processing module, comprising:
Bandpass filter, described bandpass filter is connected with described infrared receiving module, for receiving described initialize signal, and the initialize signal outside filtering particular frequency range, obtain characteristic frequency initialize signal.Further, described bandpass filter, comprising: low-pass filter, and described low-pass filtering implement body is connected with described photoelectric switching circuit, for the initialize signal of filtering higher than particular frequency range; Hi-pass filter, described Hi-pass filter is connected with described low-pass filter, for the initialize signal of filtering lower than particular frequency range.Low-pass filter in bandpass filter and Hi-pass filter filtering higher than particular frequency range and the initialize signal lower than particular frequency range, thus obtain characteristic frequency initialize signal.
Signal extraction module, described signal extraction module is connected with described bandpass filter, for receiving described characteristic frequency initialize signal, and described characteristic frequency initialize signal is carried out amplify, detection, obtain doppler shifted signal.Because the signal exporting to signal extraction module through bandpass filter is very small, amplify circuit below if do not carry out and cannot carry out alerting signal sampling, therefore must first signal be amplified.So, further, described signal extraction module comprises: signal amplification circuit, and described signal amplification circuit is connected with the Hi-pass filter in described bandpass filter, for receiving described characteristic frequency initialize signal and amplifying described characteristic frequency initialize signal; Detecting circuit, described detecting circuit is connected with described signal amplification circuit, for the characteristic frequency initialize signal after amplification is converted into doppler shifted signal.
Low-pass filter, described low-pass filter is connected with described signal extraction module, for receiving described doppler shifted signal, and carries out filtering process to described doppler shifted signal.What signal exported after detecting circuit detection is doppler shifted signal, and this doppler shifted signal is also with some undesired signals close with its frequency, undesired signal frequency is a little more than described doppler shifted signal frequency, and therefore the utility model embodiment needs by the undesired signal of low-pass filter filtering higher than voltage signal frequency.
Signal sampling module, described signal sampling module is connected with described low-pass filter, for the doppler shifted signal after the process that accepts filter, and gather the change of the doppler shifted signal after filtering process, absolute value sample is carried out to the change of the doppler shifted signal after filtering process, obtains sampled voltage.Further, described signal sampling module, comprising: dynamic error computing circuit, and described dynamic error computing circuit is for gathering the change of the doppler shifted signal after filtering process; Absolute value amplifying circuit, described absolute value amplifying circuit is connected with described dynamic error computing circuit, for carrying out absolute value sample to the change of described doppler shifted signal, forms sampled voltage.
Described dynamic error computing circuit can collect the change of doppler shifted signal, namely when not having in surveyed area that there are objects moving, the infrared waves signal that infrared receiving module receives is more stable, and in the ideal situation, the voltage that described dynamic error computing circuit exports is a fixing initial value; When in surveyed area, there are objects moving, because the infrared waves of invasion personnel and transmitting forms relative motion and causes the appearance of Doppler shift, what described dynamic error computing circuit exported according to the situation of movement of object is positive voltage or negative voltage (change of doppler shifted signal).Then, absolute value amplifying circuit, to the change process of doppler shifted signal, obtains the variable quantity of doppler shifted signal, and namely generating positive and negative voltage is exported to absolute value amplifying circuit and all can be become positive voltage.
So-called Doppler effect is when observer and sound, and when the vibration source such as light and radiowave produces relative motion with certain relative velocity, the vibration frequency that observer receives and the frequency that vibration source sends can be different.The frequency change formed by Doppler effect is called Doppler shift, and it is directly proportional to relative velocity, is inversely proportional to the frequency of vibration.Therefore, this characteristic of light wave can be utilized to carry out the intrusion detection of personnel.According to Doppler effect principle, described dynamic error computing circuit can also extract object translational speed by gathering the change of doppler shifted signal, object movement faster, and the change of doppler shifted signal is stronger, amplitude of variation is faster; Object from described infrared receiving module more close to, the amplitude of variation of described doppler shifted signal is stronger.The utility model utilizes specific infrared transmission module to detected field emission infrared waves, utilize the infrared receiving module Received signal strength matched, when surveyed area has personnel to invade, there is relative motion in the infrared waves sent due to personnel and infrared transmission module, and the appearance of light wave Doppler shift must be caused, accurately can judge whether surveyed area has personnel to invade by the Coherent processing of infrared receiving module, and then make alert process.
As shown in Figure 3, described dynamic error computing circuit, comprising:
First resistance R1, one end of described first resistance R1 is connected with the output terminal of described low-pass filter;
The inverting input of the first operational amplifier OA1, described first operational amplifier OA1 is connected with the other end of described first resistance R1, the in-phase input end ground connection of described first operational amplifier OA1;
One end of second resistance R2, described second resistance R2 is connected with the inverting input of described first operational amplifier OA1, and the other end of described second resistance R2 is connected with the output terminal of described first operational amplifier OA1;
One end of 3rd resistance R3, described 3rd resistance R3 is connected with the output terminal of described first operational amplifier OA1;
Second operational amplifier OA2, the in-phase input end of described second operational amplifier OA2 is connected with the output terminal of described low-pass filter, and the inverting input of described second operational amplifier OA2 is connected with the output terminal of described second operational amplifier OA2;
One end of 4th resistance R4, described 4th resistance R4 is connected with the output terminal of described second operational amplifier OA2;
One end of direct earth capacitance C, described direct earth capacitance C is connected with the other end of described 4th resistance R4, the other end ground connection of described direct earth capacitance C;
The in-phase input end of the 3rd operational amplifier OA3, described 3rd operational amplifier OA3 is connected with the other end of described 4th resistance R4, and the inverting input of described 3rd operational amplifier OA3 is connected with the output terminal of described 3rd operational amplifier OA3;
One end of 5th resistance R5, described 5th resistance R5 is connected with the output terminal of described 3rd operational amplifier OA3, and the other end of described 5th resistance R5 is connected with the other end of described 3rd resistance R3;
Four-operational amplifier OA4, the in-phase input end of described four-operational amplifier OA4 is connected with the other end of described 5th resistance R5, the reverse inter-input-ing ending grounding of described four-operational amplifier OA4, the output terminal of described four-operational amplifier OA4 is connected with described absolute value amplifying circuit.
First resistance R1, the second resistance R2 and the first operational amplifier OA1 form the first circuit, inverting input and the output terminal of the second operational amplifier OA2 connect and compose second circuit, and inverting input and the output terminal of the 3rd operational amplifier OA3 connect and compose tertiary circuit.Doppler shifted signal one tunnel exports via the first circuit and the 3rd resistance R3, and another road exports via second circuit, the 4th resistance R4, direct earth capacitance C and tertiary circuit, the 5th resistance.The first circuit realiration reverse output function of doppler shifted signal; Second circuit and tertiary circuit are for penetrating with circuit, achieve the function increasing input doppler shifted signal power, its output voltage is identical with input voltage phase, input to the normal phase input end of four-operational amplifier OA4 after the doppler shifted signal that the doppler shifted signal exported through the 5th resistance R5 and the 3rd resistance R3 export carries out error amount computing, and export.Direct earth capacitance C plays charging time delay, voltage signal memory function.
Described alarm module, comprising:
Signal amplification circuit, described signal amplification circuit for receiving described sampled voltage, and amplifies described sampled voltage.Described signal amplification circuit is again amplified by the voltage sampling signal that absolute value amplifying circuit exports, thus compare with reference voltage in comparator circuit, plays the effect of alarm decision.
Comparator circuit, described comparator circuit is connected with described signal amplification circuit, for the sampled voltage after amplification and reference voltage being compared, when described sampled voltage is greater than reference voltage, produces alerting signal.If described sampled voltage is less than reference voltage, then illustrate do not have the intrusion object that can affect infrared light frequency substantial variations, in safe range, described comparator circuit does not produce alerting signal, but prepares the comparison in next cycle.
Alarm, described alarm is connected with described comparator circuit, for receiving described alerting signal, and reports to the police.Described alarm is sound alarm subsystem, or, light crossing-signal, or, vibrations alarm etc.
The intruder detection system of light wave Doppler effect that utilizes disclosed in the utility model utilizes Doppler effect, by judging that the method for relative motion determines intrusion behavior.Interference can not be produced to relative motion by Environmental variations (temperature, humidity, illumination) to the physical influence of infrared waves, and due to the radiation scope of infrared waves comparatively large, ensure that detection range and detection angle.Therefore, disclosed in the utility model utilize the intruder detection system of light wave Doppler effect solve the intrusion detectors such as traditional infrared, microwave, ultrasound wave by natural environment influence more greatly, easy disturbed, the problem such as rate of false alarm is high and fail to report.
Another embodiment of the utility model also discloses a kind of intrusion detection method utilizing light wave Doppler effect, and the method comprises:
Infrared waves signal is launched to surveyed area.When not occurring that personnel invade situation in surveyed area, infrared waves signal is more stable; When occurring that personnel invade situation in surveyed area, because invasion personnel and infrared waves form relative motion and cause the appearance of Doppler shift.
Receive the infrared waves signal in described surveyed area.
Described infrared waves signal is converted to initialize signal.When not occurring that personnel invade situation in surveyed area, infrared waves signal is more stable, then described initialize signal is also more stable; When occurring that personnel invade situation in surveyed area, cause the appearance of Doppler shift because invasion personnel and infrared waves form relative motion, now described initialize signal there will be fluctuation.
Described initialize signal is processed, produces sampled voltage.Described described initialize signal to be processed, produce the process of sampled voltage, comprising: the initialize signal of filtering particular frequency range outer (higher than particular frequency range with lower than characteristic frequency), obtains characteristic frequency initialize signal; Described characteristic frequency initialize signal is carried out amplify, detection, obtain doppler shifted signal; Filtering process is carried out to described doppler shifted signal, because described doppler shifted signal is also with some undesired signals close with its frequency, undesired signal frequency is a little more than described doppler shifted signal frequency, and therefore the utility model embodiment needs filtering higher than the undesired signal of voltage signal frequency; Gather the change of the doppler shifted signal after filtering process; Absolute value sample is carried out to the change of described doppler shifted signal, obtains sampled voltage.When not occurring in surveyed area that personnel invade, when described initialize signal is more stable, the sampled voltage of generation is a fixing initial value; When occurring that personnel invade situation in surveyed area, described initialize signal there will be fluctuation, through processing described initialize signal, collect the change of the doppler shifted signal on fixing initial value voltage reference, and obtain for a certain on the occasion of sampled voltage.
Described sampled voltage is amplified.Because described sampled voltage is through repeatedly filtering process, its signal intensity is less, therefore needs to carry out amplification process to described sampled voltage.
Sampled voltage after amplification and reference voltage are compared, when described sampled voltage is greater than reference voltage, reports to the police.If described sampled voltage is less than reference voltage, then illustrates there is no the intrusion object that can affect infrared light frequency substantial variations, in safe range, do not produce alerting signal, but prepare the comparison in next cycle.If when described sampled voltage is greater than reference voltage, illustrates that the intrusion object that can affect infrared light frequency substantial variations exists, produce alerting signal, can trigger alarm behavior.
The intrusion detection method of light wave Doppler effect that utilizes disclosed in the utility model utilizes Doppler effect, by judging that the method for relative motion determines intrusion behavior.Interference can not be produced to relative motion by Environmental variations (temperature, humidity, illumination) to the physical influence of infrared waves, and due to the radiation scope of infrared waves comparatively large, ensure that detection range and detection angle.Therefore, disclosed in the utility model to utilize the intrusion detection method of light wave Doppler effect to solve the intrusion detectors such as traditional active infrared, passive infrared, microwave, ultrasound wave comparatively large by natural environment influence, easily disturbed, the problem such as rate of false alarm is high and fail to report.
Above to the utility model be provided in and utilize the intruder detection system of light wave Doppler effect and utilize the intrusion detection method of light wave Doppler effect to be described in detail.Apply specific case herein to set forth principle of the present utility model and embodiment, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection domain of the utility model claim.
Claims (9)
1. utilize an intruder detection system for light wave Doppler effect, it is characterized in that, comprising:
Infrared transmission module, described infrared transmission module is used for launching infrared waves signal to surveyed area;
Infrared receiving module, described infrared waves signal for receiving the infrared waves signal in described surveyed area, and is converted to initialize signal by described infrared receiving module;
Signal processing module, described signal processing module is connected with described infrared receiving module, for receiving described initialize signal, and processes described initialize signal, produces sampled voltage;
Alarm module, described alarm module is connected with described signal processing module, for receiving described sampled voltage, and described sampled voltage is amplified, sampled voltage after amplification and reference voltage are compared, when described sampled voltage is greater than reference voltage, reports to the police.
2. utilize the intruder detection system of light wave Doppler effect according to claim 1, it is characterized in that, described infrared transmission module comprises:
Infrared-emitting diode, described infrared-emitting diode is for launching infrared waves signal;
Oscillatory circuit, described oscillatory circuit is connected with described infrared-emitting diode, for the transmission frequency of fixing described infrared waves signal.
3. utilize the intruder detection system of light wave Doppler effect according to claim 1, it is characterized in that, described infrared receiving module comprises:
Infrared receiving diode, described infrared receiving diode is for receiving the infrared waves signal in described surveyed area;
Photoelectric switching circuit, described photoelectric switching circuit is connected with described infrared receiving diode, for described infrared waves signal is converted to initialize signal.
4. utilize the intruder detection system of light wave Doppler effect according to claim 1, it is characterized in that, described signal processing module, comprising:
Bandpass filter, described bandpass filter is connected with described infrared receiving module, for receiving described initialize signal, and the initialize signal outside filtering particular frequency range, obtain characteristic frequency initialize signal;
Signal extraction module, described signal extraction module is connected with described bandpass filter, for receiving described characteristic frequency initialize signal, and described characteristic frequency initialize signal is carried out amplify, detection, obtain doppler shifted signal;
Low-pass filter, described low-pass filter is connected with described signal extraction module, for receiving described doppler shifted signal, and carries out filtering process to described doppler shifted signal;
Signal sampling module, described signal sampling module is connected with described low-pass filter, for the doppler shifted signal after the process that accepts filter, and gathers the change of the doppler shifted signal after filtering process, absolute value sample is carried out to the change of described doppler shifted signal, obtains sampled voltage.
5. utilize the intruder detection system of light wave Doppler effect according to claim 4, it is characterized in that, described bandpass filter, comprising:
Low-pass filter, described low-pass filter is used for the initialize signal of filtering higher than particular frequency range;
Hi-pass filter, described Hi-pass filter is connected with described low-pass filter, for the initialize signal of filtering lower than particular frequency range.
6. utilize the intruder detection system of light wave Doppler effect according to claim 4, it is characterized in that, described signal extraction module, comprising:
Signal amplification circuit, described signal amplification circuit is used for amplifying described characteristic frequency initialize signal;
Detecting circuit, described detecting circuit is connected with described signal amplification circuit, for the characteristic frequency initialize signal after amplification is converted into doppler shifted signal.
7. utilize the intruder detection system of light wave Doppler effect according to claim 4, it is characterized in that, described signal sampling module, comprising:
Dynamic error computing circuit, described dynamic error computing circuit is for gathering the change of doppler shifted signal after filtering process;
Absolute value amplifying circuit, described absolute value amplifying circuit is connected with described dynamic error computing circuit, for carrying out absolute value sample to the change of described doppler shifted signal, forms sampled voltage.
8. utilize the intruder detection system of light wave Doppler effect according to claim 7, it is characterized in that, described dynamic error computing circuit, comprising:
First resistance, one end of described first resistance is connected with the output terminal of described low-pass filter;
First operational amplifier, the inverting input of described first operational amplifier is connected with the other end of described first resistance, the in-phase input end ground connection of described first operational amplifier;
Second resistance, one end of described second resistance is connected with the inverting input of described first operational amplifier, and the other end of described second resistance is connected with the output terminal of described first operational amplifier;
3rd resistance, one end of described 3rd resistance is connected with the output terminal of described first operational amplifier;
Second operational amplifier, the in-phase input end of described second operational amplifier is connected with the output terminal of described low-pass filter, and the inverting input of described second operational amplifier is connected with the output terminal of described second operational amplifier;
4th resistance, one end of described 4th resistance is connected with the output terminal of described second operational amplifier;
Direct earth capacitance, one end of described direct earth capacitance is connected with the other end of described 4th resistance, the other end ground connection of described direct earth capacitance;
3rd operational amplifier, the in-phase input end of described 3rd operational amplifier is connected with the other end of described 4th resistance, and the inverting input of described 3rd operational amplifier is connected with the output terminal of described 3rd operational amplifier;
5th resistance, one end of described 5th resistance is connected with the output terminal of described 3rd operational amplifier, and the other end of described 5th resistance is connected with the other end of described 3rd resistance;
Four-operational amplifier, the in-phase input end of described four-operational amplifier is connected with the other end of described 5th resistance, the reverse inter-input-ing ending grounding of described four-operational amplifier, and the output terminal of described four-operational amplifier is connected with described absolute value amplifying circuit.
9. utilize the intruder detection system of light wave Doppler effect according to claim 1, it is characterized in that, described alarm module, comprising:
Signal amplification circuit, described signal amplification circuit for receiving described sampled voltage, and amplifies described sampled voltage;
Comparator circuit, described comparator circuit is connected with described signal amplification circuit, for the sampled voltage after amplification and reference voltage being compared, and when described sampled voltage is greater than reference voltage, produces alerting signal;
Alarm, described alarm is connected with described comparator circuit, for receiving described alerting signal, and reports to the police.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520711185.7U CN204926373U (en) | 2015-09-14 | 2015-09-14 | Utilize light wave doppler effect's invasion detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520711185.7U CN204926373U (en) | 2015-09-14 | 2015-09-14 | Utilize light wave doppler effect's invasion detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204926373U true CN204926373U (en) | 2015-12-30 |
Family
ID=54975482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520711185.7U Withdrawn - After Issue CN204926373U (en) | 2015-09-14 | 2015-09-14 | Utilize light wave doppler effect's invasion detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204926373U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105046860A (en) * | 2015-09-14 | 2015-11-11 | 北京世纪之星应用技术研究中心 | Intrusion detection system and method using Doppler effect of light waves |
-
2015
- 2015-09-14 CN CN201520711185.7U patent/CN204926373U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105046860A (en) * | 2015-09-14 | 2015-11-11 | 北京世纪之星应用技术研究中心 | Intrusion detection system and method using Doppler effect of light waves |
| WO2017045476A1 (en) * | 2015-09-14 | 2017-03-23 | 北京世纪之星应用技术研究中心 | Invasion detection system and method using light-wave doppler effect |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105046860A (en) | Intrusion detection system and method using Doppler effect of light waves | |
| CN104008621B (en) | Defence area type optical fiber disturbance perimeter security system and invasion disturbance method for rapidly judging | |
| CN105371943B (en) | The demodulation method and device of a kind of distributed optical fiber vibration sensing system | |
| CN101620764B (en) | Distributed optical fiber vibration sensing system based on polarization beam splitting detection and sensing method | |
| CN103617685B (en) | A kind of self-learning algorithm based on optical fiber vibration sensing warning system | |
| CN108387909A (en) | Regional environment based on laser radar net monitors system | |
| CN203324493U (en) | Infrared detector | |
| CN204926373U (en) | Utilize light wave doppler effect's invasion detection system | |
| CN106354057A (en) | Pick-up device | |
| CN204331954U (en) | A kind of precise positioning type optical fiber induction pre-alarm system | |
| CN203894890U (en) | U-shaped perimeter invasion detecting system of transformer station | |
| CN107331095A (en) | A kind of utilization target movement produces the intrusion detection method of light variable | |
| CN203825757U (en) | Optical fiber anti-intrusion sensing device | |
| CN203812352U (en) | Long distance optical fiber circumference invasion alarming system | |
| CN111897026B (en) | Distributed multi-defense area optical fiber perimeter security system | |
| CN104021641A (en) | Security detection device of transformer substation | |
| CN104458002A (en) | Detector electrical system device | |
| CN203519171U (en) | Infrared detector | |
| CN103761821A (en) | Orchard guarding service robot | |
| CN107862820A (en) | A kind of perimeter alarm system | |
| CN108877122B (en) | Chaos laser interference type multi-defense area intrusion target early warning system | |
| CN204177478U (en) | A kind of fiber-optic vibration checkout equipment amplified based on the distant pump of different fibre | |
| CN102110339A (en) | Microwave perturbation detector | |
| CN203720969U (en) | Infrared microwave detector | |
| WO2021207551A1 (en) | Two stage processing distributed fiber optic sensing (dfos) interrogator for acoustic modulated signals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151230 Effective date of abandoning: 20180413 |
|
| AV01 | Patent right actively abandoned |