CN104794840A - Ultrasonic Doppler alarm - Google Patents
Ultrasonic Doppler alarm Download PDFInfo
- Publication number
- CN104794840A CN104794840A CN201510167651.4A CN201510167651A CN104794840A CN 104794840 A CN104794840 A CN 104794840A CN 201510167651 A CN201510167651 A CN 201510167651A CN 104794840 A CN104794840 A CN 104794840A
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- module
- alarm
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- ultrasonic
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
- G08B13/1609—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems
- G08B13/1618—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means
- G08B13/1627—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means using Doppler shift detection circuits
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Burglar Alarm Systems (AREA)
Abstract
The invention discloses an ultrasonic Doppler alarm. The ultrasonic Doppler alarm is characterized by comprising an ultrasonic transmission module, an acoustic-electric conversion, receiving and amplification module, a detection module, an amplification module, a rectification module, a comparison module and an alarm module which are sequentially serially connected with one another; 40KHz ultrasonic waves are outputted by the ultrasonic transmission module; reflected 40KHz ultrasonic signals are received and then amplified by the acoustic-electric conversion, receiving and amplification module; offset frequency signals are filtered by the detection module; detected movement signals are inputted into the alarm module by the comparison module; the alarm module comprises a trigger and a wireless transmission circuit, audible and visual alarm effects can be realized by the trigger after the trigger is triggered by the inputted movement signals, and remote alarm effects can be realized by the wireless transmission circuit. Compared with the prior art, the ultrasonic Doppler alarm has the advantages that movable objects can be monitored in real time, the ultrasonic Doppler alarm is low in cost, high in sensitivity and interference resistance, long in detection distance and good in stability, alarm signals can be wirelessly transmitted to administrators, accordingly, the remote alarm effects can be realized, and the like.
Description
Technical field
The present invention relates to electronic monitoring technical field, especially a kind of supersonic Doppler alarm.
Background technology
Ultrasonic technology is a kind of new and high technology grown up in 20th century, and ultrasound wave has that frequency high (more than 20KHz), diffraction are little, good directionality and the feature such as penetration power is strong, has caused the extensive concern of scientific worker.Can reflect to form reflection wave when ultrasound wave runs into barrier, if run into mobile object can also produce Doppler effect, this has just opened up new field for the research of alarm, have developed the alarm of various different purposes and function.
At present, what market was used more is pyroelectric infrared alarm, gas alarm and smoke alarm etc., the infrared penetration power of Infrared intrusion detector is poor, the infrared radiation of human body is easily stopped by other object be not easily detected, the scope of application of gas alarm and smoke alarm is less, effectively can not detect the stealing activity of robber.In daily life, we in stealing once discovery robber, have the behavior expression that meeting is certain, namely keep away unavoidable movement.If we can detect this movable signal, and send the alerting signal responded with movable signal, so we just can report to the police effectively, catch and arrest robber.
It is less that the ultrasonic alarm of prior art also exists alarm range, especially can not effectively report to the police to moving target.
Summary of the invention
The object of the invention is a kind of supersonic Doppler alarm designed for the deficiencies in the prior art, adopt ultrasound wave in conjunction with Doppler effect technology, make to carry out Real-Time Monitoring to mobile object in the region of setting, and immediately send the alerting signal responded with movable signal, effectively, report to the police in time, take precautions against and seize robber, alerting signal wireless transmission being realized remote alarms, the burglar alarm of the playgrounds such as bank, market and museum or residence area can be widely used in.
The object of the present invention is achieved like this: a kind of supersonic Doppler alarm, be characterized in that this alarm is vibrated by ultrasound wave frequency stabilization to drive sending module to be connected in series successively with ultrasound wave acoustic-electric conversion receiver amplification module, difference frequency signal detection module, amplification module, rectification module, comparison module and radio frequency output alarm module to form, described ultrasound wave frequency stabilization vibration drives sending module to be ultrasonic transmitter and triode composition output 40KHz hyperacoustic positive feedback frequency stabilization oscillatory circuit; Described ultrasound wave acoustic-electric conversion receiver amplification module is made up of ceramic vibrator transducer and operational amplifier, and ceramic vibrator transducer will obtain the mixed signal of two-stage amplification through operational amplifier after the 40KHz ultrasound signal receipt of reflection; Described difference frequency signal detection module adopts diode detection circuit to be leached by the deviation frequency signal in mixed signal; Described amplification module obtains alternating voltage after being amplified by the deviation frequency signal leached; The alternating voltage of input is access comparison module after DC voltage through voltage multiplying rectifier by described rectification module; The DC voltage of input and pincers are controlled voltage compare by described comparison module, and the movable signal input radio frequency output alarm module that will detect; Described radio frequency output alarm module is by monostable d type flip flop, wireless transmission circuit and be provided with hummer, the alarm control circuit of LED forms, monostable d type flip flop starts hummer after being triggered by the movable signal inputted and LED carries out sound and light alarm, and realizes remote alarms by wireless transmission circuit.
The present invention compared with prior art has with low cost, highly sensitive, detection range is far away, good stability and the advantage such as antijamming capability is strong, can be widely used in carrying out Real-Time Monitoring to mobile object in the playgrounds such as bank, market and museum or residence area, send alerting signal if desired, effectively seize robber, wireless for the alerting signal keeper of issuing can be realized remote alarms.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Accompanying drawings 1, the present invention is vibrated by ultrasound wave frequency stabilization and is driven sending module 1 to be connected in series successively with ultrasound wave acoustic-electric conversion receiver amplification module 2, difference frequency signal detection module 3, amplification module 4, rectification module 5, comparison module 6 and radio frequency output alarm module 7 to form.Described ultrasound wave frequency stabilization vibration drives transtation mission circuit 1 to be made up of ultrasonic transmitter T40-16 and two low-frequency low-power transistor 2SC9013, triode Q
1and Q
2form two-stage total radio amplifier, ultrasonic transmitter T40-16 is connected between the base stage of total radio amplifier and collector and forms a resonator oscillator circuit, makes ultrasonic transmitter have positive feedback effect, goes out the ultrasonic signal of 40KHz to spatial emission.Described ultrasound wave acoustic-electric conversion receiver amplification module 2 is made up of ultrasonic receiver, ceramic vibrator transducer and operational amplifier, ultrasonic receiver will obtain the mixed signal of two-stage amplification after ceramic vibrator transducer and operational amplifier after the 40KHz ultrasound signal receipt reflected, operational amplifier adopts the two-stage of TLC2274 chip to amplify, the pulse signal converting 40KHz through ceramic vibrator transducer to is very faint, detection below cannot be carried out, about 330 ~ 3660 times need be amplified by the two-stage of operational amplifier.Described difference frequency signal detection module 3 adopts diode detection circuit deviation frequency and movable signal to be filtered out from mixed signal, and diode detection circuit is made up of detector diode, high-frequency filter capacitor, pull-up resistor and coupling capacitance.Described amplification module 4 adopts TLC2274 chip to carry out two-stage amplification about about 1500 times to shifted signal.Described rectification module 5 adopts the voltage multiplying rectifier of commutation diode and capacitor composition that lower alternating current is promoted to higher DC voltage, then transports to next stage by voltage follower, falls the impact between front stage with " isolation ".Pincers control voltage in the DC voltage of input and comparer compares by described comparison module 6, controlling voltage as clamped is 2V, if the DC voltage of input is greater than 2V, then illustrate and movable signal detected, this movable signal input radio frequency output alarm module 7 is started alarm mode by comparison module 6; Otherwise if the DC voltage of input is less than 2V, then illustrates and movable signal do not detected, then the voltage after integration will start electric discharge, decay, by regulating comparative voltage to adjust detection sensitivity and degree of stability.Described radio frequency output alarm module 7 is made up of monostable d type flip flop, alarm control circuit and wireless transmission circuit, the movable signal of input is started hummer by d type flip flop to radio frequency output alarm module 7 and LED carries out sound and light alarm, its lamp bright time can by regulating d type flip flop and electric capacity and being connected of resistance, wireless transmission circuit adopts the wireless sending module of PT2262 chip and 315M, send alerting signal by the high frequency transmission circuit starting of oscillation of PT2262 chip triggering 315MHz is concurrent, realize remote alarms by wireless transmission circuit.
The present invention carries out Real-Time Monitoring and warning to mobile object like this: first ultrasound wave frequency stabilization vibration drives sending module 1 to send the guarded region of ultrasonic signal to setting, ultrasonic signal runs into barrier reflection ultrasonic signal, if barrier is mobile object, such as robber, ultrasonic signal according to the reflection of Doppler effect mobile object can change by occurrence frequency, and these signals are called deviation frequency signal or movable signal.Then the ultrasonic signal reflected and movable signal are received by ultrasound wave acoustic-electric conversion receiver amplification module 2 and are converted to electric signal, the signal received due to ultrasound wave acoustic-electric conversion receiver amplification module 2 is the mixed signal comprising movable signal, need therefrom to filter out movable signal by difference frequency signal detection module 3, this movable signal is very faint, need to be amplified this signal by amplification module 4, and be higher DC voltage by rectification module 5 lower alternating voltage times repoussage.Then the pincers control voltage of this DC voltage and comparison module 6 is compared, if this DirectCurrent Voltage Ratio pincers control voltage is large, then output alarm signal is to radio frequency output alarm module 7, regulate pincers control voltage to coordinate sensitivity and degree of stability, finally will receive alerting signal by radio frequency output alarm module 7 carries out sound and light alarm by LED alarm lamp and hummer, and realizes remote alarms by wireless transmission circuit with the transmission of the form of radiowave.
More than just the present invention will be further described, and be not used to limit this patent, allly implements for the present invention's equivalence, within the right that all should be contained in this patent.
Claims (1)
1. a supersonic Doppler alarm, it is characterized in that this alarm is vibrated by ultrasound wave frequency stabilization to drive sending module to be connected in series successively with ultrasound wave acoustic-electric conversion receiver amplification module, difference frequency signal detection module, amplification module, rectification module, comparison module and radio frequency output alarm module to form, described ultrasound wave frequency stabilization vibration drives sending module to be ultrasonic transmitter and triode composition output 40KHz hyperacoustic positive feedback frequency stabilization oscillatory circuit; Described ultrasound wave acoustic-electric conversion receiver amplification module is made up of ceramic vibrator transducer and operational amplifier, and ceramic vibrator transducer will obtain the mixed signal of two-stage amplification through operational amplifier after the 40KHz ultrasound signal receipt of reflection; Described difference frequency signal detection module adopts diode detection circuit to be leached by the deviation frequency signal in mixed signal; Described amplification module obtains alternating voltage after being amplified by the deviation frequency signal leached; The alternating voltage of input is access comparison module after DC voltage through voltage multiplying rectifier by described rectification module; The DC voltage of input and pincers are controlled voltage compare by described comparison module, and the movable signal input radio frequency output alarm module that will detect; Described radio frequency output alarm module is by monostable d type flip flop, wireless transmission circuit and be provided with hummer, the alarm control circuit of LED forms, monostable d type flip flop starts hummer after being triggered by the movable signal inputted and LED carries out sound and light alarm, and realizes remote alarms by wireless transmission circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510167651.4A CN104794840A (en) | 2015-04-10 | 2015-04-10 | Ultrasonic Doppler alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510167651.4A CN104794840A (en) | 2015-04-10 | 2015-04-10 | Ultrasonic Doppler alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104794840A true CN104794840A (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510167651.4A Pending CN104794840A (en) | 2015-04-10 | 2015-04-10 | Ultrasonic Doppler alarm |
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| CN (1) | CN104794840A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2060002U (en) * | 1989-05-13 | 1990-08-01 | 刘玉华 | Supersonic anti-theft alarm |
| CN2090083U (en) * | 1991-05-03 | 1991-12-04 | 张金师 | Doppler anti-theft siren |
| CN2098710U (en) * | 1991-09-01 | 1992-03-11 | 毕卫国 | Anti-theft alarming lamp |
| CN2314410Y (en) * | 1997-12-09 | 1999-04-14 | 美新科技股份有限公司 | Ultrasonic anti-stealing device |
| KR100954739B1 (en) * | 2009-07-07 | 2010-04-23 | (주)이엔아이엔지니어링 | Security and display system |
| CN202042028U (en) * | 2011-04-01 | 2011-11-16 | 西安理工大学 | Antitheft alarm automatic wireless transmitting device based on ultrasonic wave detection |
| CN202120392U (en) * | 2011-06-08 | 2012-01-18 | 霍山东科科技开发有限公司 | Ultrasonic anti-theft alarm |
| CN204557699U (en) * | 2015-04-10 | 2015-08-12 | 华东师范大学 | A kind of supersonic Doppler alarm |
-
2015
- 2015-04-10 CN CN201510167651.4A patent/CN104794840A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2060002U (en) * | 1989-05-13 | 1990-08-01 | 刘玉华 | Supersonic anti-theft alarm |
| CN2090083U (en) * | 1991-05-03 | 1991-12-04 | 张金师 | Doppler anti-theft siren |
| CN2098710U (en) * | 1991-09-01 | 1992-03-11 | 毕卫国 | Anti-theft alarming lamp |
| CN2314410Y (en) * | 1997-12-09 | 1999-04-14 | 美新科技股份有限公司 | Ultrasonic anti-stealing device |
| KR100954739B1 (en) * | 2009-07-07 | 2010-04-23 | (주)이엔아이엔지니어링 | Security and display system |
| CN202042028U (en) * | 2011-04-01 | 2011-11-16 | 西安理工大学 | Antitheft alarm automatic wireless transmitting device based on ultrasonic wave detection |
| CN202120392U (en) * | 2011-06-08 | 2012-01-18 | 霍山东科科技开发有限公司 | Ultrasonic anti-theft alarm |
| CN204557699U (en) * | 2015-04-10 | 2015-08-12 | 华东师范大学 | A kind of supersonic Doppler alarm |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150722 |
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| RJ01 | Rejection of invention patent application after publication |