CN102707287A - Piezoelectric type ultrasonic distance measurement system - Google Patents
Piezoelectric type ultrasonic distance measurement system Download PDFInfo
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- CN102707287A CN102707287A CN201210169354XA CN201210169354A CN102707287A CN 102707287 A CN102707287 A CN 102707287A CN 201210169354X A CN201210169354X A CN 201210169354XA CN 201210169354 A CN201210169354 A CN 201210169354A CN 102707287 A CN102707287 A CN 102707287A
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Abstract
The invention provides a piezoelectric type ultrasonic distance measurement system for optimizing each parameter of a piezoelectric type ultrasonic distance measurement system and improving the test performance of the piezoelectric type ultrasonic distance measurement system. The system adopts a single chip STC12C5202AD to produce the square signals of the ultrasonic waves, adopts a hex phase inverter CD4069 as a pre-posted driver and a sorting circuit of a transmission system, adopts an integrated circuit CX20106A as an amplifying circuit, an amplitude limiting circuit, a band-pass filtering circuit, a peak detection circuit and a waveform shaping circuit which are used for receiving the signals of the system, and adopts the software to respectively control the start-up time of an ultrasonic transmitter and the start-up time of an ultrasonic receiver. The frequency of the ultrasonic wave is 40kHz, and the wavelength is 34000/40000=0.85cm. The spacing distance between the ultrasonic generator and the ultrasonic receiver is over 5cm, and the ultrasonic generator and the ultrasonic receiver are arranged in parallel to a circuit board. According to the distance measurement system provided by the invention, the sensitivity and the anti-interference ability of the piezoelectric type ultrasonic distance measurement system are improved, the volume is small, and the integration is easy.
Description
Technical field
The present invention relates to a kind of ultrasonic ranging system, specially refer to a kind of piezoelectric ultrasonic range measurement system.
Background technology
Ultrasound wave directive property is strong; Energy consumption is slow, and the distance of in medium, propagating is far away, and (atmospheric conditions) velocity of propagation is identical in identical communications media; Thereby; Send ultrasound wave through ultrasonic transmission device, but the measuring distance just of the mistiming when receiving ultrasound wave according to receiver promptly utilizes the ultrasonic measurement distance.Can realize through ultrasound wave like stadimeter and fill level measuring device etc.Utilize ultrasound examination often relatively rapidly, convenient, calculate simple, be easy to accomplish real-time control, and aspect measuring accuracy, can reach the practical requirement of industry.Usually, adopt the ultrasonic generator of piezoelectric-type ultrasonic wave producer as ultrasonic ranging system.Said piezoelectric-type ultrasonic wave producer is actually the resonance that utilizes piezoelectric crystal and comes work, and its inner structure comprises two piezoelectric chips and a sounding board.When its two poles of the earth applying pulse signal, when its frequency equaled the natural mode shape of piezoelectric chip, piezoelectric chip will resonate, and drove the sounding board vibration, just produced ultrasound wave.Otherwise, if impressed voltage not between two electrodes when sounding board receives ultrasound wave, will be oppressed piezoelectric chip and vibrate, convert mechanical energy into electric signal, at this moment, said piezoelectric-type ultrasonic wave producer be ultrasonic receiver.Obviously, the factors such as topology layout of the frequency of operation of piezoelectric-type ultrasonic wave producer, wavelength, driving circuit, amplification finishing circuit and stadimeter directly affect the measurement performance of ultrasonic ranging system.
Summary of the invention
For optimizing the parameters of piezoelectric ultrasonic range measurement system, improve the test performance of piezoelectric ultrasonic range measurement system, the present invention proposes a kind of piezoelectric ultrasonic range measurement system.Piezoelectric ultrasonic range measurement system of the present invention comprises: ultrasonic emitting system and ultrasound wave receiving system, wherein, adopt single-chip microcomputer STC12C5202AD to produce the ultrasound wave square-wave signal; Adopt pre-driver and the finishing circuit of hex inverter CD4069 as emission coefficient; Adopt amplification, amplitude limit, bandpass filtering, peak detection and the waveform shaping circuit of the integrated circuit CX20106A of sony corporation of japan production as the signal of receiving system; Adopt software to control the opening time of ultrasonic transmitter and the opening time of ultrasonic receiver respectively; Ultrasonic frequency is 40kHz, and wavelength is 34000/40000=0.85cm; The spacing distance of ultrasonic generator and receiver and is parallel to circuit board and places more than 5cm.
Further; Piezoelectric ultrasonic range measurement system of the present invention adopts pre-driver and the finishing circuit of hex inverter CD4069 as emission coefficient; Comprise; The P1.0 interface of single-chip microcomputer STC12C5202AD connects the input end of hex inverter U3A, and the output terminal of U3A connects the input end of hex inverter U3B and the parallelly connected input end of hex inverter U3E and U3F, and the output terminal of U3B connects the parallelly connected input end of hex inverter U3C and U3D; The parallelly connected output terminal of hex inverter U3E and U3F is through a pin of capacitor C 1 connection piezoelectric-type ultrasonic wave producer, and the parallelly connected output terminal of hex inverter U3C and U3D connects the another pin of piezoelectric-type ultrasonic wave producers through capacitor C 2; And when using the waterproof ultrasonic generator, all transformers in the employing connect ultrasonic generator after voltage risen to 110V to 150V again.
Further; Piezoelectric ultrasonic range measurement system of the present invention adopts amplification, amplitude limit, bandpass filtering, peak detection and the waveform shaping circuit of the integrated circuit CX20106A of sony corporation of japan production as the signal of receiving system; Comprise; Adopt the centre frequency of the outer meeting resistance R5 accommodation zone bandpass filter of integrated circuit CX20106A pin 5, RC circuit conditioning enlargement factor and the gain of adopting integrated circuit CX20106A pin 2 to connect.
Further; Piezoelectric ultrasonic range measurement system of the present invention adopts the centre frequency of the outer meeting resistance R5 accommodation zone bandpass filter of integrated circuit CX20106A pin 5; Comprise; When the outer meeting resistance R5 of CX20106A pin 5 value was 200k to 220k, capacitor C 3 values of pin 6 were 330p, and the electrochemical capacitor C2 value of pin 3 is 3.3 μ f.
Further; RC circuit conditioning enlargement factor and gain that piezoelectric ultrasonic range measurement system of the present invention adopts integrated circuit CX20106A pin 2 to connect; Comprise; When 1 value of the resistance R in the RC circuit be 4.7 Ω, when the power source voltage Vcc value is 5V, capacitor C 1 value in the RC circuit is 1UF, detection range is between the 0.3m to 3m.
The useful technique effect of piezoelectric ultrasonic range measurement system of the present invention is sensitivity and the antijamming capability that has improved the piezoelectric ultrasonic range measurement system, and volume is little, is easy to integrated.
Description of drawings
Accompanying drawing 1 is the ultrasonic emitting system circuit diagram of piezoelectric ultrasonic range measurement system of the present invention;
Accompanying drawing 2 is ultrasound wave receiving system circuit diagrams of piezoelectric ultrasonic range measurement system of the present invention.
Below in conjunction with accompanying drawing and embodiment piezoelectric ultrasonic range measurement system of the present invention is further described.
Embodiment
Accompanying drawing 1 is the ultrasonic emitting system circuit diagram of piezoelectric ultrasonic range measurement system of the present invention; Accompanying drawing 2 is ultrasound wave receiving system circuit diagrams of piezoelectric ultrasonic range measurement system of the present invention; Among the figure; P1.0 and P3.2 are the interface of single-chip microcomputer STC12C5202AD, and U3A～U3F is hex inverter CD4069, and CX20106 is the integrated circuit CX20106A that sony corporation of japan is produced.Can know that by figure piezoelectric ultrasonic range measurement system of the present invention comprises: adopt single-chip microcomputer STC12C5202AD to produce the ultrasound wave square-wave signal; Ultrasonic emitting system and ultrasound wave receiving system wherein, adopt pre-driver and the finishing circuit of hex inverter CD4069 as emission coefficient; Adopt amplification, amplitude limit, bandpass filtering, peak detection and the waveform shaping circuit of the integrated circuit CX20106A of sony corporation of japan production as the signal of receiving system; Adopt software to control the opening time of ultrasonic transmitter and the opening time of ultrasonic receiver respectively; Ultrasonic frequency is 40kHz, and wavelength is 34000/40000=0.85cm; The spacing distance of ultrasonic generator and receiver and is parallel to circuit board and places more than 5cm.
For the ultrasonic emitting system, by the square wave of single-chip microcomputer STC12C5202AD generation 40KHz, its ultrasonic frequency is 40kHz, and wavelength is 34000/40000=0.85cm; And receiving CD4069 through the P1.0 mouth of single-chip microcomputer STC12C5202AD, the CD4069 of back then nurses one's health the 40KHz frequency signal, so that ultrasonic sensor produces resonance.When using the waterproof ultrasonic probe, because of driving voltage is had relatively high expectations, CD4069 can't directly drive ultrasonic sensor, should voltage be risen to 110V ~ 150V drive through all transformers in.Particularly; Piezoelectric ultrasonic range measurement system of the present invention adopts pre-driver and the finishing circuit of hex inverter CD4069 as emission coefficient; Comprise; The single-chip microcomputer output terminal that produces the ultrasound wave square wave connects the input end of hex inverter U3A, and the output terminal of U3A connects the input end of hex inverter U3B and the parallelly connected input end of hex inverter U3E and U3F, and the output terminal of U3B connects the parallelly connected input end of hex inverter U3C and U3D; The parallelly connected output terminal of hex inverter U3E and U3F is through a pin of capacitor C 1 connection piezoelectric-type ultrasonic wave producer, and the parallelly connected output terminal of hex inverter U3C and U3D connects the another pin of piezoelectric-type ultrasonic wave producers through capacitor C 2; And when using the waterproof ultrasonic generator, all transformers in the employing connect ultrasonic generator after voltage risen to 110V to 150V again.
For the ultrasound wave receiving system; Piezoelectric ultrasonic range measurement system of the present invention adopts amplification, amplitude limit, bandpass filtering, peak detection and the waveform shaping circuit of the integrated circuit CX20106A of sony corporation of japan production as the signal of receiving system; Comprise; Adopt the centre frequency of the outer meeting resistance accommodation zone bandpass filter of integrated circuit CX20106A pin 5, RC circuit conditioning enlargement factor and the gain of adopting integrated circuit CX20106A pin 2 to connect.CX20106A does to receive in the infrared remote control system produced of sony corporation of japan to put the bipolar integrated circuit of usefulness in advance, the remote control receiving integrate circuit of the multiple model that can be used to replace.The main pin of CX20106A and function declaration are shown in table 1-1.The prime amplifier of CX20106A has automatic gain control function, and can guarantee has higher gain when ultrasonic sensor reception reflected signal output far away weak voltage, and amplifier can not transship when closely input signal is strong; Its BPF. centre frequency can be regulated by the outer meeting resistance of chip pin 5, does not need external inductance, can avoid the interference of external magnetic field to circuit, and reliability is higher.CX20106A receives ultrasound wave has very high sensitivity and antijamming capability, can satisfy the requirement of receiving circuit.Simultaneously, use integrated circuit also can reduce the phase mutual interference between the circuit, reduce electrical noise.
Main pin and the function declaration of table 1.1:CX20106A
Piezoelectric ultrasonic range measurement system of the present invention adopts the centre frequency of the outer meeting resistance R5 accommodation zone bandpass filter of integrated circuit CX20106A pin 5, RC circuit conditioning enlargement factor and the gain of adopting integrated circuit CX20106A pin 2 to connect, wherein:
Adopt the centre frequency of the outer meeting resistance R5 accommodation zone bandpass filter of integrated circuit CX20106A pin 5; Comprise; When the outer meeting resistance R5 of CX20106A pin 5 value was 200k to 220k, capacitor C 3 values of pin 6 were 330p, and the electrochemical capacitor C2 value of pin 3 is 3.3 μ f.
RC circuit conditioning enlargement factor and the gain of adopting integrated circuit CX20106A pin 2 to connect; Comprise; When 1 value of the resistance R in the RC circuit be 4.7 Ω, when the power source voltage Vcc value is 5V, capacitor C 1 value in the RC circuit is 1UF, detection range is between the 0.3m to 3m.
Ultrasound wave is propagated in air through too much bar and is separated by very near path repeatedly back and forth; The gain of integrated circuit CX20106A is more than 74db in addition; Ultrasonic ranging system be easy to the to be interfered influence of signal; For this reason, the spacing distance that piezoelectric ultrasonic range measurement system of the present invention structurally requires ultrasonic generator and receiver and is parallel to circuit board and places more than 5cm.In addition; When the unlatching of ultrasonic transmitter; Almost just received the repercussions of reflection supersonic wave and ultrasonic transmitter at the synchronization ultrasonic receiver, the repercussions of ultrasonic transmitter will cause great interference to range measurement system, therefore; Piezoelectric ultrasonic range measurement system of the present invention adopts software to control the opening time of ultrasonic transmitter and the opening time of ultrasonic receiver respectively, to avoid the repercussions interference when ultrasonic transmitter.
The useful technique effect of piezoelectric ultrasonic range measurement system of the present invention is sensitivity and the antijamming capability that has improved the piezoelectric ultrasonic range measurement system, and Ei, and volume is little, is easy to integrated.
Claims (5)
1. piezoelectric ultrasonic range measurement system, it is characterized in that: this range measurement system comprises: ultrasonic emitting system and ultrasound wave receiving system, wherein, adopt single-chip microcomputer STC12C5202AD to produce the ultrasound wave square-wave signal; Adopt pre-driver and the finishing circuit of hex inverter CD4069 as emission coefficient; Adopt amplification, amplitude limit, bandpass filtering, peak detection and the waveform shaping circuit of the integrated circuit CX20106A of sony corporation of japan production as the signal of receiving system; Adopt software to control the opening time of ultrasonic transmitter and the opening time of ultrasonic receiver respectively; Ultrasonic frequency is 40kHz, and wavelength is 34000/40000=0.85cm; The spacing distance of ultrasonic generator and receiver and is parallel to circuit board and places more than 5cm.
2. according to the said piezoelectric ultrasonic range measurement system of claim 1; It is characterized in that: adopt pre-driver and the finishing circuit of hex inverter CD4069 as emission coefficient; Comprise; The P1.0 interface of single-chip microcomputer STC12C5202AD connects the input end of hex inverter U3A, and the output terminal of U3A connects the input end of hex inverter U3B and the parallelly connected input end of hex inverter U3E and U3F, and the output terminal of U3B connects the parallelly connected input end of hex inverter U3C and U3D; The parallelly connected output terminal of hex inverter U3E and U3F is through a pin of capacitor C 1 connection piezoelectric-type ultrasonic wave producer, and the parallelly connected output terminal of hex inverter U3C and U3D connects the another pin of piezoelectric-type ultrasonic wave producers through capacitor C 2; And when using the waterproof ultrasonic generator, all transformers in the employing connect ultrasonic generator after voltage risen to 110V to 150V again.
3. according to the said piezoelectric ultrasonic range measurement system of claim 1; It is characterized in that: adopt amplification, amplitude limit, bandpass filtering, peak detection and the waveform shaping circuit of the integrated circuit CX20106A of sony corporation of japan production as the signal of receiving system; Comprise; Adopt the centre frequency of the outer meeting resistance R5 accommodation zone bandpass filter of integrated circuit CX20106A pin 5, RC circuit conditioning enlargement factor and the gain of adopting integrated circuit CX20106A pin 2 to connect.
4. according to the said piezoelectric ultrasonic range measurement system of claim 3; It is characterized in that: the centre frequency that adopts the outer meeting resistance R5 accommodation zone bandpass filter of integrated circuit CX20106A pin 5; Comprise; When the outer meeting resistance R5 of CX20106A pin 5 value was 200k to 220k, capacitor C 3 values of pin 6 were 330p, and the electrochemical capacitor C2 value of pin 3 is 3.3 μ f.
5. according to the said piezoelectric ultrasonic range measurement system of claim 3; It is characterized in that: RC circuit conditioning enlargement factor and the gain of adopting integrated circuit CX20106A pin 2 to connect; Comprise; When 1 value of the resistance R in the RC circuit be 4.7 Ω, when the power source voltage Vcc value is 5V, capacitor C 1 value in the RC circuit is 1UF, detection range is between the 0.3m to 3m.
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| CN201210169354XA CN102707287A (en) | 2012-05-28 | 2012-05-28 | Piezoelectric type ultrasonic distance measurement system |
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| CN201210169354XA CN102707287A (en) | 2012-05-28 | 2012-05-28 | Piezoelectric type ultrasonic distance measurement system |
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| CN201210169354XA Pending CN102707287A (en) | 2012-05-28 | 2012-05-28 | Piezoelectric type ultrasonic distance measurement system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411567A (en) * | 2013-04-19 | 2013-11-27 | 北京工业大学 | Detector for amount of carbon deposit in heat carrier furnace pipeline based on longitudinal guided wave and detection method thereof |
| CN104501751A (en) * | 2014-12-29 | 2015-04-08 | 西安交通大学 | Transmitting and receiving circuit for two-channel high-frequency ultrasonic probe |
| CN108007531A (en) * | 2017-11-28 | 2018-05-08 | 中船重工环境工程有限公司 | A kind of echo signal processing circuit of ultrasonic material level meter |
Citations (3)
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| JPS60140168A (en) * | 1983-12-27 | 1985-07-25 | Matsushita Electric Ind Co Ltd | Ultrasonic distance measuring apparatus |
| CN1641376A (en) * | 2003-12-17 | 2005-07-20 | 株式会社电装 | Apparatus for detecting a distance and apparatus for detecting a body |
| CN201945686U (en) * | 2011-03-06 | 2011-08-24 | 东北石油大学 | Ultrasonic distance meter based on AT89C51 singlechip |
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2012
- 2012-05-28 CN CN201210169354XA patent/CN102707287A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60140168A (en) * | 1983-12-27 | 1985-07-25 | Matsushita Electric Ind Co Ltd | Ultrasonic distance measuring apparatus |
| CN1641376A (en) * | 2003-12-17 | 2005-07-20 | 株式会社电装 | Apparatus for detecting a distance and apparatus for detecting a body |
| CN201945686U (en) * | 2011-03-06 | 2011-08-24 | 东北石油大学 | Ultrasonic distance meter based on AT89C51 singlechip |
Non-Patent Citations (1)
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| 刘南平，石军: "《电子产品组装、调试、设计与制作实训》", 31 May 2011 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411567A (en) * | 2013-04-19 | 2013-11-27 | 北京工业大学 | Detector for amount of carbon deposit in heat carrier furnace pipeline based on longitudinal guided wave and detection method thereof |
| CN103411567B (en) * | 2013-04-19 | 2016-08-24 | 北京工业大学 | Heat carrier furnace pipeline carbon deposition quantity detector based on longitudinal wave guide and detection method |
| CN104501751A (en) * | 2014-12-29 | 2015-04-08 | 西安交通大学 | Transmitting and receiving circuit for two-channel high-frequency ultrasonic probe |
| CN108007531A (en) * | 2017-11-28 | 2018-05-08 | 中船重工环境工程有限公司 | A kind of echo signal processing circuit of ultrasonic material level meter |
| CN108007531B (en) * | 2017-11-28 | 2020-12-29 | 中船重工环境工程有限公司 | Echo signal processing circuit of ultrasonic level meter |
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Application publication date: 20121003 |