CN204065405U - Ultrasonic transmission/reception integrative control circuit - Google Patents
Ultrasonic transmission/reception integrative control circuit Download PDFInfo
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- CN204065405U CN204065405U CN201420536584.XU CN201420536584U CN204065405U CN 204065405 U CN204065405 U CN 204065405U CN 201420536584 U CN201420536584 U CN 201420536584U CN 204065405 U CN204065405 U CN 204065405U
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Abstract
The utility model discloses a kind of ultrasonic transmission/reception integrative control circuit, it is characterized in that: comprise ultrasonic transmit circuit, the input end of this ultrasonic transmit circuit receives a pulse signal, the output terminal of ultrasonic transmit circuit is connected with the electric signal input end of ultrasonic transducer, the electrical signal of this ultrasonic transducer is connected with signal amplification circuit by absolute value varying circuit, the output terminal of this signal amplification circuit is connected with envelope detection circuit, and the output terminal of this envelope detection circuit is connected with look-at-me generative circuit.Its remarkable result is: this circuit is simple, and measuring accuracy is high, and emissive power is adjustable, and have employed transmitting-receiving integrated ultrasonic transducer, and volume is little, and use element few, cost is low, stable performance.
Description
Technical field
The utility model relates to ultrasonic measuring distance technology field, specifically, is a kind of ultrasonic transmission/reception integrative control circuit.
Background technology
Because hyperacoustic directive property is strong, energy ezpenditure is slow, and that propagates in media as well is distant, and thus ultrasound wave is through being usually used in closely contactless range observation, the measurement of such as liquid level, the aspects such as coal seam thickness measuring, robot localization, automobile collision avoidance radar, auxiliary vision system.Ultrasonic ranging principle is: drive ultrasonic transmitter to launch ultrasound wave to barrier, and hyperacousticly start timing in transmitting simultaneously, ultrasound wave runs into barrier and just returns immediately in the way of propagating, the ultrasound wave (i.e. echo) returned is received by ultrasonic receiver, and timing is stopped while receiving reflection wave, just can calculate the distance between launching site and barrier according to the mistiming of the aerial velocity of propagation of ultrasound wave and record.
Utilize ultrasonic measurement distance general relatively rapidly, convenient, calculate simple, be easy to realize real-time control, and the practical requirement of industry can be reached in measuring accuracy, be thus widely used in modern industry production run.But traditional ultrasonic ranging equipment compares output owing to adopting the comparer of fixed threshold, makes it there is many deficiencies: measuring accuracy is lower; Mostly do not adopt transmitting-receiving integrated ultrasonic transducer, cause supersonic sounding equipment volume large, cost is high.
Utility model content
For the deficiencies in the prior art, the purpose of this utility model is to provide a kind of ultrasonic transmission/reception integrative control circuit, and this circuit measuring precision is high, and adopt transmitting-receiving integrated ultrasonic transducer, volume is little, and cost is low.
For achieving the above object, the utility model states a kind of ultrasonic transmission/reception integrative control circuit, its key is: comprise ultrasonic transmit circuit, the input end of this ultrasonic transmit circuit receives a pulse signal, the output terminal of ultrasonic transmit circuit is connected with the electric signal input end of ultrasonic transducer, the electrical signal of this ultrasonic transducer is connected with signal amplification circuit by absolute value varying circuit, the output terminal of this signal amplification circuit is connected with envelope detection circuit, and the output terminal of this envelope detection circuit is connected with look-at-me generative circuit;
Described absolute value varying circuit comprises triode Q2, base stage serial capacitors C7 and the electrical signal being connected described ultrasonic transducer after resistance R9 of this triode Q2,8V direct supply is connect after the collector crosstalk resistance R3 and resistance R2 of triode Q2, the emitter of triode Q2 is through resistance R11 ground connection, the collector of triode Q2 accesses in described signal amplification circuit through electric capacity C1, the base stage of triode Q2 is also connected with the negative electrode of voltage stabilizing diode D3, the plus earth of voltage stabilizing diode D3, is also connected with resistance R7 between the collector and base stage of triode Q2;
Described envelope detection circuit comprises voltage stabilizing diode D1, the anode of this voltage stabilizing diode D1 is connected with the output terminal of described signal amplification circuit, the negative electrode of this voltage stabilizing diode D1 is connected with the input end of described look-at-me generative circuit through resistance R5, and the negative electrode of voltage stabilizing diode D1 is also through electric capacity C5 ground connection.
Described ultrasonic transmit circuit is used for the pulse signal sent by controllers such as receiving single-chip microcomputer, and is converted into sine wave signal; Described ultrasonic transducer is used for after the excitation being subject to sine wave signal, launches ultrasonic signal to barrier, and for receiving the echoed signal reflected by barrier; Described absolute value varying circuit is used for the negative voltage part in filtering voltage signal; Described signal amplification circuit is used for carrying out amplification process to the voltage signal that absolute value varying circuit exports; Described envelope detection circuit is used for carrying out AM Dector process to amplifying the signal after processing; Described look-at-me generative circuit produces look-at-me according to the signal after AM Dector and exports controller to.This circuit measuring precision is high, and have employed transmitting-receiving integrated ultrasonic transducer, and volume is little, and use element few, cost is low, stable performance.
As further describing, described ultrasonic transmit circuit comprises triode Q3, the base stage of this triode Q3 receives described pulse signal, the collector of triode Q3 connects 12V direct supply after R12, the grounded emitter of triode Q3, the collector of triode Q3 connects the electric signal input end of described ultrasonic transducer.
As further describing, described signal amplification circuit comprises operational amplifier U1, the anti-phase of this operational amplifier U1 enters to hold the output terminal connecing described absolute value varying circuit successively after electric capacity C6 and resistance R4, the public connecting end of electric capacity C6 and resistance R4 is also through resistance R8 ground connection, the normal phase input end of described operational amplifier U1 connects 8V direct supply, the output terminal of described operational amplifier U1 is connected with the anode of described diode D1 through electric capacity C3, the anode of diode D1 is also connected with the negative electrode of diode D2, the plus earth of diode D2, resistance R6 is also serially connected with between the output terminal of described operational amplifier U1 and inverting input, the output terminal of described operational amplifier U1 connects the common port of electric capacity C6 and resistance R4 through electric capacity C2.
As further describing, described look-at-me generative circuit comprises triode Q1, be connected with the output terminal of described envelope detection circuit after the base series resistor R5 of triode Q1,3.3V direct supply is connect after the collector crosstalk resistance R1 of triode Q1, the grounded emitter of triode Q1, the collector of triode Q1 exports look-at-me.
As further describing, in order to obtain stable ultrasonic signal, described pulse signal adopts frequency to be the square-wave signal of 40kHz.
Remarkable result of the present utility model is: this circuit is simple, and measuring accuracy is high, and emissive power is adjustable, and have employed transmitting-receiving integrated ultrasonic transducer, and volume is little, and use element few, cost is low, stable performance.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model and principle of work are described in further detail.
As shown in Figure 1, a kind of ultrasonic transmission/reception integrative control circuit, comprise ultrasonic transmit circuit, the input end of this ultrasonic transmit circuit receives a pulse signal, the output terminal of ultrasonic transmit circuit is connected with the electric signal input end of ultrasonic transducer, the electrical signal of this ultrasonic transducer is connected with signal amplification circuit by absolute value varying circuit, the output terminal of this signal amplification circuit is connected with envelope detection circuit, and the output terminal of this envelope detection circuit is connected with look-at-me generative circuit;
Described ultrasonic transmit circuit comprises triode Q3, described pulse signal is received after the base series R15 of this triode Q3, the collector of triode Q3 connects 12V direct supply after R12, the grounded emitter of triode Q3, the collector of triode Q3 connects the electric signal input end of described ultrasonic transducer;
Described absolute value varying circuit comprises triode Q2, base stage serial capacitors C7 and the electrical signal being connected described ultrasonic transducer after resistance R9 of this triode Q2,8V direct supply is connect after the collector crosstalk resistance R3 and resistance R2 of triode Q2, the emitter of triode Q2 is through resistance R11 ground connection, the collector of triode Q2 accesses in described signal amplification circuit through electric capacity C1, the base stage of triode Q2 is also connected with the negative electrode of voltage stabilizing diode D3, the plus earth of voltage stabilizing diode D3, is also connected with resistance R7 between the collector and base stage of triode Q2;
Described signal amplification circuit comprises operational amplifier U1, the anti-phase of this operational amplifier U1 enters to hold the output terminal connecing described absolute value varying circuit successively after electric capacity C6 and resistance R4, the public connecting end of electric capacity C6 and resistance R4 is also through resistance R8 ground connection, the normal phase input end of described operational amplifier U1 connects 8V direct supply, the output terminal of described operational amplifier U1 is connected with the anode of described diode D1 through electric capacity C3, the anode of diode D1 is also connected with the negative electrode of diode D2, the plus earth of diode D2, resistance R6 is also serially connected with between the output terminal of described operational amplifier U1 and inverting input, the output terminal of described operational amplifier U1 connects the common port of electric capacity C6 and resistance R4 through electric capacity C2,
Described envelope detection circuit comprises voltage stabilizing diode D1, the anode of this voltage stabilizing diode D1 is connected with the output terminal of described signal amplification circuit, the negative electrode of this voltage stabilizing diode D1 is connected with the input end of described look-at-me generative circuit through resistance R5, the negative electrode also ground connection after electric capacity C5 of voltage stabilizing diode D1;
Described look-at-me generative circuit comprises triode Q1, be connected with the output terminal of described envelope detection circuit after the base series resistor R5 of triode Q1,3.3V direct supply is connect after the collector crosstalk resistance R1 of triode Q1, the grounded emitter of triode Q1, the collector of triode Q1 exports look-at-me.
Described ultrasonic transmit circuit is used for the pulse signal sent by reception single-chip microcomputer, and is converted into sine wave signal; Described ultrasonic transducer is used for after the excitation being subject to sine wave signal, launches ultrasonic signal to barrier, and for receiving the echoed signal reflected by barrier; Described absolute value varying circuit is used for the negative voltage part in filtering voltage signal; Described signal amplification circuit is used for carrying out amplification process to the voltage signal that absolute value varying circuit exports; Described envelope detection circuit is used for carrying out AM Dector process to amplifying the signal after processing; Described look-at-me generative circuit produces look-at-me according to the signal after AM Dector and exports controller to.
As preferably, pulse signal described in the present embodiment adopts frequency to be the square-wave signal of 40kHz.
Principle of work:
As shown in Figure 1, wherein CSB connects the electric signal input end of ultrasonic transducer, and IN end is the square wave of 40kHz for receiving the fixed frequency of single-chip microcomputer generation, and OUT end is look-at-me output terminal, usually used as the interrupting input of single-chip microcomputer;
Ultrasound wave is launched: frequency is that the square-wave pulse signal of 40kHz drives triode Q3, with the switching frequency of 40kHz, the voltage above PS-12V is added to ultrasonic transducer and sends ultrasound wave; When reality uses, if desired more remote investigative range, can increase PS-12V, adjusts R12 current limliting simultaneously;
Ultrasound wave receives: because the echoed signal produced may have 12V the most by force, obviously directly can not enter inside single-chip microcomputer and process, therefore for echoed signal, first be undertaken every straight process by electric capacity C7, obtain just there is negative echoed signal; Then absolute value varying circuit is formed by triode Q2, resistance R7, resistance R11, when the signal that the base stage of triode Q2 adds is negative time, by D3 clamper to-0.7V, thus triode Q2 by, the voltage of the collector of triode Q2 is just, triode Q2 is operated in switching mode, thus achieves the change of echoed signal absolute value; Form signal amplification circuit by ideal operational amplificr U1 and electric capacity C2, electric capacity C6, resistance R8, electric capacity C3, voltage stabilizing diode D2 afterwards, complete the shaping of filtering to echoed signal waveform and waveform; Then envelope detection is carried out through voltage stabilizing diode D1 and electric capacity C5; Final driving triode Q1 exports look-at-me to single-chip microcomputer, and single-chip microcomputer, according to sending ultrasonic signal and the mistiming receiving look-at-me, in conjunction with the velocity of propagation of sound, thus calculates the distance between ultrasonic transmission device and barrier.
Claims (5)
1. a ultrasonic transmission/reception integrative control circuit, it is characterized in that: comprise ultrasonic transmit circuit, the input end of this ultrasonic transmit circuit receives a pulse signal, the output terminal of ultrasonic transmit circuit is connected with the electric signal input end of ultrasonic transducer, the electrical signal of this ultrasonic transducer is connected with signal amplification circuit by absolute value varying circuit, the output terminal of this signal amplification circuit is connected with envelope detection circuit, and the output terminal of this envelope detection circuit is connected with look-at-me generative circuit;
Described absolute value varying circuit comprises triode Q2, base stage serial capacitors C7 and the electrical signal being connected described ultrasonic transducer after resistance R9 of this triode Q2,8V direct supply is connect after the collector crosstalk resistance R3 and resistance R2 of triode Q2, the emitter of triode Q2 is through resistance R11 ground connection, the collector of triode Q2 accesses in described signal amplification circuit through electric capacity C1, the base stage of triode Q2 is also connected with the negative electrode of voltage stabilizing diode D3, the plus earth of voltage stabilizing diode D3, is also connected with resistance R7 between the collector and base stage of triode Q2;
Described envelope detection circuit comprises voltage stabilizing diode D1, the anode of this voltage stabilizing diode D1 is connected with the output terminal of described signal amplification circuit, the negative electrode of this voltage stabilizing diode D1 is connected with the input end of described look-at-me generative circuit through resistance R5, and the negative electrode of voltage stabilizing diode D1 is also through electric capacity C5 ground connection.
2. ultrasonic transmission/reception integrative control circuit according to claim 1, it is characterized in that: described ultrasonic transmit circuit comprises triode Q3, the base stage of this triode Q3 receives described pulse signal, the collector of triode Q3 connects 12V direct supply after R12, the grounded emitter of triode Q3, the collector of triode Q3 connects the electric signal input end of described ultrasonic transducer.
3. ultrasonic transmission/reception integrative control circuit according to claim 1, it is characterized in that: described signal amplification circuit comprises operational amplifier U1, the anti-phase of this operational amplifier U1 enters to hold the output terminal connecing described absolute value varying circuit successively after electric capacity C6 and resistance R4, the public connecting end of electric capacity C6 and resistance R4 is also through resistance R8 ground connection, the normal phase input end of described operational amplifier U1 connects 8V direct supply, the output terminal of described operational amplifier U1 is connected with the anode of described diode D1 through electric capacity C3, the anode of diode D1 is also connected with the negative electrode of diode D2, the plus earth of diode D2, resistance R6 is also serially connected with between the output terminal of described operational amplifier U1 and inverting input, the output terminal of described operational amplifier U1 connects the common port of electric capacity C6 and resistance R4 through electric capacity C2.
4. ultrasonic transmission/reception integrative control circuit according to claim 1, it is characterized in that: described look-at-me generative circuit comprises triode Q1, be connected with the output terminal of described envelope detection circuit after the base series resistor R5 of triode Q1,3.3V direct supply is connect after the collector crosstalk resistance R1 of triode Q1, the grounded emitter of triode Q1, the collector of triode Q1 exports look-at-me.
5. ultrasonic transmission/reception integrative control circuit according to claim 1 and 2, is characterized in that: described pulse signal adopts frequency to be the square-wave signal of 40kHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420536584.XU CN204065405U (en) | 2014-09-18 | 2014-09-18 | Ultrasonic transmission/reception integrative control circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420536584.XU CN204065405U (en) | 2014-09-18 | 2014-09-18 | Ultrasonic transmission/reception integrative control circuit |
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| CN204065405U true CN204065405U (en) | 2014-12-31 |
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| CN201420536584.XU Expired - Fee Related CN204065405U (en) | 2014-09-18 | 2014-09-18 | Ultrasonic transmission/reception integrative control circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105708497B (en) * | 2016-01-18 | 2018-11-13 | 深圳开立生物医疗科技股份有限公司 | A kind of high frequency ultrasound exciting circuit and high frequency intravascular ultrasound system |
-
2014
- 2014-09-18 CN CN201420536584.XU patent/CN204065405U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105708497B (en) * | 2016-01-18 | 2018-11-13 | 深圳开立生物医疗科技股份有限公司 | A kind of high frequency ultrasound exciting circuit and high frequency intravascular ultrasound system |
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Granted publication date: 20141231 Termination date: 20150918 |
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