CN105022069A - Automotive reversing aid device - Google Patents
Automotive reversing aid device Download PDFInfo
- Publication number
- CN105022069A CN105022069A CN201510373014.2A CN201510373014A CN105022069A CN 105022069 A CN105022069 A CN 105022069A CN 201510373014 A CN201510373014 A CN 201510373014A CN 105022069 A CN105022069 A CN 105022069A
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- CN
- China
- Prior art keywords
- ceramic vibrator
- piezoelectric ceramic
- ultrasound wave
- vibrator transducer
- transducer
- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
- G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The invention discloses an automotive reversing aid device. The automotive reversing aid device comprises an ultrasonic transmitting sensor and an ultrasonic receiving sensor; the ultrasonic transmitting sensor comprises a square-wave generator, a field effect transistor drive circuit and a piezoelectric ceramic vibrator transducer A which are successively connected; the ultrasonic receiving sensor comprises a piezoelectric ceramic vibrator transducer B and a signal amplifier which are successively connected; and the piezoelectric ceramic vibrator transducer B receives an ultrasonic wave sent by the piezoelectric ceramic vibrator transducer A.
Description
Technical field
The present invention relates to reversing automobile technology, specifically reversing automobile servicing unit.
Background technology
The ultrasonic sensor technology that reversing obstacle detection system adopts can detect neighbouring barrier, for driver provides reversing warning and auxiliary function of parking, its principle utilizes on ultrasonic listening reversing path or any barrier of neighbouring existence, and give a warning in time.Designed detection system can provide acousto-optic and the luxuriant sense of hearing and visual alert simultaneously, and its warning represents it is the Distance geometry direction having detected barrier in blind area.Like this, no matter park or drive in narrow place, by reversing obstruction warning detection system, driver psychology pressure will reduce, and can take necessary operation masterlyly.
Summary of the invention
The object of the present invention is to provide a kind of reversing automobile servicing unit, have devised a kind of reversing automobile servicing unit of low cost.
Object of the present invention is achieved through the following technical solutions: reversing automobile servicing unit, comprise ultrasound wave and send sensor, ultrasound wave receiving sensor, described ultrasound wave sends sensor and comprises the square-wave generator, field effect transistor driving circuit, the piezoelectric ceramic vibrator transducer A that link successively, ultrasound wave receiving sensor comprises the piezoelectric ceramic vibrator transducer B, the signal amplifier that link successively, the ultrasound wave sent by piezoelectric ceramic vibrator transducer B reception piezoelectric ceramic vibrator transducer A.
The present invention forms by by ultrasound wave transmission sensor and ultrasound wave receiving sensor.Ultrasound wave sends sensor and uses diameter to be the ceramic vibrator transducer of about 15mm by square-wave generator, field effect transistor driving circuit, piezoelectric ceramic vibrator transducer A() form, piezoelectric ceramic vibrator transducer A effect the electric oscillation energy conversion of ceramic vibrator is become ultrasonic energy and penetrates to aerial width; And ultrasound wave receiving sensor is made up of piezoelectric ceramic vibrator transducer B and amplifier, piezoelectric ceramic vibrator transducer B receives ultrasound wave and produces mechanical vibration, mechanical vibration are transformed into electric flux, as the output of ultrasound wave receiving sensor, thus the ultrasound wave sent are detected.And in actual use, the ceramic vibrator that also can be used as piezoelectric ceramic vibrator transducer B of the ceramic vibrator of piezoelectric ceramic vibrator transducer A.
If send to ultrasound wave the piezoelectric ceramic vibrator transducer A applying 40KHz HF voltage that sensor interior resonance frequency is 40KHz, then piezoelectric ceramic vibrator transducer A just extends according to added HF voltage polarity and shortens, so send the ultrasound wave of 40KHz frequency, its ultrasound wave propagates (density degree can be modulated by control circuit) with density form, its ultrasound waves passes to ultrasound wave receiving sensor, it is the principle utilizing piezoelectric effect that ultrasound wave sends sensor, namely pressure is applied on the piezoelectric element, piezoelectric element is strained, then producing one side is "+" pole, another side is "-" the 40KHz sinusoidal voltage of pole, because this HF voltage amplitude is less, therefore must amplify, therefore amplifier is equipped with afterwards.
According to ultrasonic sensor equivalent electrical circuit and impedance operator, send sensor to ultrasound wave, work in series resonance, namely resonance frequency fr place impedance Z r is minimum, therefore can peak power be supplied, can larger vibration sensor be used, and for ultrasound wave receiving sensor, work in parallel resonance, namely resonance frequency f α place impedance Z α is the highest, difficult for high-power, but impedance Z α higher position can obtain comparatively large amplitude signal, and so f α place is used as sensor, it is highly sensitive.
It is reflective that the working method surveying obstacle yarn system ultrasonic transducer is picked up in reversing, namely ultrasound wave sends the ultrasound wave that sensor transducer launches 40KHz frequency, runs into obstacle back reflection by the receive MUT of ultrasound wave receiving sensor and converts electric signal to.
The ceramic vibrator transducer of piezoelectric ceramic vibrator transducer A to be diameter be 15mm.
The ceramic vibrator transducer of piezoelectric ceramic vibrator transducer B to be diameter be 15mm.
Square-wave generator produces 40KHz signal.
Piezoelectric ceramic vibrator transducer A produces the ultrasound wave of 40KHz frequency.
Signal amplifier exports 40KHz sinusoidal voltage.
The invention has the advantages that: structure of the present invention is simple, and cost is low, highly sensitive.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Reference numeral in figure is expressed as: 1, feed main line, the 2, first lateral radiation paster, and 3, left side radiation patch, 4, right side radiation patch, the 5, second lateral radiation paster, 6, medium substrate, 7, metal floor.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
embodiment 1:
As shown in Figure 1.
Reversing automobile servicing unit, comprise ultrasound wave and send sensor, ultrasound wave receiving sensor, described ultrasound wave sends sensor and comprises the square-wave generator, field effect transistor driving circuit, the piezoelectric ceramic vibrator transducer A that link successively, ultrasound wave receiving sensor comprises the piezoelectric ceramic vibrator transducer B, the signal amplifier that link successively, the ultrasound wave sent by piezoelectric ceramic vibrator transducer B reception piezoelectric ceramic vibrator transducer A.
The present invention forms by by ultrasound wave transmission sensor and ultrasound wave receiving sensor.Ultrasound wave sends sensor and uses diameter to be the ceramic vibrator transducer of about 15mm by square-wave generator, field effect transistor driving circuit, piezoelectric ceramic vibrator transducer A() form, piezoelectric ceramic vibrator transducer A effect the electric oscillation energy conversion of ceramic vibrator is become ultrasonic energy and penetrates to aerial width; And ultrasound wave receiving sensor is made up of piezoelectric ceramic vibrator transducer B and amplifier, piezoelectric ceramic vibrator transducer B receives ultrasound wave and produces mechanical vibration, mechanical vibration are transformed into electric flux, as the output of ultrasound wave receiving sensor, thus the ultrasound wave sent are detected.And in actual use, the ceramic vibrator that also can be used as piezoelectric ceramic vibrator transducer B of the ceramic vibrator of piezoelectric ceramic vibrator transducer A.
If send to ultrasound wave the piezoelectric ceramic vibrator transducer A applying 40KHz HF voltage that sensor interior resonance frequency is 40KHz, then piezoelectric ceramic vibrator transducer A just extends according to added HF voltage polarity and shortens, so send the ultrasound wave of 40KHz frequency, its ultrasound wave propagates (density degree can be modulated by control circuit) with density form, its ultrasound waves passes to ultrasound wave receiving sensor, it is the principle utilizing piezoelectric effect that ultrasound wave sends sensor, namely pressure is applied on the piezoelectric element, piezoelectric element is strained, then producing one side is "+" pole, another side is "-" the 40KHz sinusoidal voltage of pole, because this HF voltage amplitude is less, therefore must amplify, therefore amplifier is equipped with afterwards.
According to ultrasonic sensor equivalent electrical circuit and impedance operator, send sensor to ultrasound wave, work in series resonance, namely resonance frequency fr place impedance Z r is minimum, therefore can peak power be supplied, can larger vibration sensor be used, and for ultrasound wave receiving sensor, work in parallel resonance, namely resonance frequency f α place impedance Z α is the highest, difficult for high-power, but impedance Z α higher position can obtain comparatively large amplitude signal, and so f α place is used as sensor, it is highly sensitive.
It is reflective that the working method surveying obstacle yarn system ultrasonic transducer is picked up in reversing, namely ultrasound wave sends the ultrasound wave that sensor transducer launches 40KHz frequency, runs into obstacle back reflection by the receive MUT of ultrasound wave receiving sensor and converts electric signal to.
The ceramic vibrator transducer of piezoelectric ceramic vibrator transducer A to be diameter be 15mm.
The ceramic vibrator transducer of piezoelectric ceramic vibrator transducer B to be diameter be 15mm.
Square-wave generator produces 40KHz signal.
Piezoelectric ceramic vibrator transducer A produces the ultrasound wave of 40KHz frequency.
Signal amplifier exports 40KHz sinusoidal voltage.
As mentioned above, then well the present invention can be realized.
Claims (6)
1. reversing automobile servicing unit, it is characterized in that: comprise ultrasound wave and send sensor, ultrasound wave receiving sensor, described ultrasound wave sends sensor and comprises the square-wave generator, field effect transistor driving circuit, the piezoelectric ceramic vibrator transducer A that link successively, ultrasound wave receiving sensor comprises the piezoelectric ceramic vibrator transducer B, the signal amplifier that link successively, the ultrasound wave sent by piezoelectric ceramic vibrator transducer B reception piezoelectric ceramic vibrator transducer A.
2. reversing automobile servicing unit according to claim 1, is characterized in that: the ceramic vibrator transducer of piezoelectric ceramic vibrator transducer A to be diameter be 15mm.
3. reversing automobile servicing unit according to claim 1, is characterized in that: the ceramic vibrator transducer of piezoelectric ceramic vibrator transducer B to be diameter be 15mm.
4. reversing automobile servicing unit according to claim 1, is characterized in that: square-wave generator produces 40KHz signal.
5. reversing automobile servicing unit according to claim 1, is characterized in that: piezoelectric ceramic vibrator transducer A produces the ultrasound wave of 40KHz frequency.
6. reversing automobile servicing unit according to claim 1, is characterized in that: signal amplifier exports 40KHz sinusoidal voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510373014.2A CN105022069A (en) | 2015-07-01 | 2015-07-01 | Automotive reversing aid device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510373014.2A CN105022069A (en) | 2015-07-01 | 2015-07-01 | Automotive reversing aid device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105022069A true CN105022069A (en) | 2015-11-04 |
Family
ID=54412171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510373014.2A Pending CN105022069A (en) | 2015-07-01 | 2015-07-01 | Automotive reversing aid device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105022069A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1296159A2 (en) * | 2001-09-19 | 2003-03-26 | Robert Bosch Gmbh | Method for measuring distance |
| CN101833860A (en) * | 2010-05-11 | 2010-09-15 | 武汉市路安电子科技有限公司 | High-precision ultrasonic fixed traffic flow investigation equipment |
| CN103163526A (en) * | 2013-02-05 | 2013-06-19 | 天津大学 | Ultrasonic Doppler velocimeter |
| CN103226199A (en) * | 2013-04-07 | 2013-07-31 | 成都科林苑电子设备有限公司 | Anti-collision alarm system for automobile reversing |
| CN203525133U (en) * | 2013-09-29 | 2014-04-09 | 赵建立 | Ultrasonic wave and intermediate-frequency electricity composite circuit system for skin medication |
| CN204925389U (en) * | 2015-07-01 | 2015-12-30 | 成都众易通科技有限公司 | Ultrasonic wave car radar system that backs a car |
-
2015
- 2015-07-01 CN CN201510373014.2A patent/CN105022069A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1296159A2 (en) * | 2001-09-19 | 2003-03-26 | Robert Bosch Gmbh | Method for measuring distance |
| CN101833860A (en) * | 2010-05-11 | 2010-09-15 | 武汉市路安电子科技有限公司 | High-precision ultrasonic fixed traffic flow investigation equipment |
| CN103163526A (en) * | 2013-02-05 | 2013-06-19 | 天津大学 | Ultrasonic Doppler velocimeter |
| CN103226199A (en) * | 2013-04-07 | 2013-07-31 | 成都科林苑电子设备有限公司 | Anti-collision alarm system for automobile reversing |
| CN203525133U (en) * | 2013-09-29 | 2014-04-09 | 赵建立 | Ultrasonic wave and intermediate-frequency electricity composite circuit system for skin medication |
| CN204925389U (en) * | 2015-07-01 | 2015-12-30 | 成都众易通科技有限公司 | Ultrasonic wave car radar system that backs a car |
Non-Patent Citations (1)
| Title |
|---|
| 孙凌逸等: ""低压电源驱动的超声波发射接收电路设计"", 《仪表技术与传感器》 * |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151104 |