CN201993341U - Ultrasonic detection sensor - Google Patents
Ultrasonic detection sensor Download PDFInfo
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- CN201993341U CN201993341U CN2010206603137U CN201020660313U CN201993341U CN 201993341 U CN201993341 U CN 201993341U CN 2010206603137 U CN2010206603137 U CN 2010206603137U CN 201020660313 U CN201020660313 U CN 201020660313U CN 201993341 U CN201993341 U CN 201993341U
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Abstract
The utility model relates to an ultrasonic detection sensor, which comprises a microprocessor (1), an ultrasonic signal transmitting circuit (2), an emission probe (3), and a receiving probe (5), wherein the microprocessor (1) is used for generating excitation pulses, whose power is amplified through the ultrasonic signal transmitting circuit (2), so as to drive the emission probe (3) to issue the ultrasonic waves. The sensor is characterized by further comprising an ultrasonic signal amplifying circuit (7), a wave detection circuit (8) and an output amplifying circuit (9), wherein the receiving probe (5) is used for obtaining ultrasonic wave receiving signals, which are then amplified through the ultrasonic signal amplifying circuit (7); and the wave detection circuit (8) is used for obtaining half-wave signals, which are output after the power amplification performed by the output amplifying circuit (9). The sensor has the following advantages: the sensor can detect the transparent material, and can avoid the detection error caused by dust in the environment and the service life of an LED light source.
Description
Technical field
The utility model relates to a kind of sensor, is specifically related to a kind of ultrasound examination sensor.
Background technology
At present, the ultrasound examination sensor is widely used in ultrasonic ranging and material Non-Destructive Testing.Fig. 1 is the ultrasonic ranging principle of work block diagram of prior art.It comprises ultrasonic signal radiating circuit 2, transmitting probe 3, receiving transducer 5, ultrasonic signal receiving circuit 6 and microprocessor 1.The effect of ultrasonic signal radiating circuit 2 is after the driving pulse that microprocessor 1 is sent here is carried out power amplification, drives transmitting probe 3 and sends ultrasound wave.6 of ultrasonic signal receiving circuits the ultrasonic signal that reflects from testee 4 and receive through receiving transducer 5 amplify, shaping becomes square wave and gives microprocessor 1, microprocessor 1 transmits by calculating and receives mistiming of signal, draws the distance (apart from S=(light velocity C time of reception T)/2) of testee 4 to probe.The numerical value of this distance can also show by display circuit.
Ultrasound wave material Non-Destructive Testing sensor is the same with distance measuring sensor, all is with utilizing the emission of detection ultrasonic signal to measure with the mistiming that reflection receives.
But the detecting instrument in some commercial units is arranged, use having or not and to meet difficulty of photoelectric sensor inspected object,, use LED (light emitting diode) just to be difficult to accurate detection as light source for example to higher transparent material.In addition, the optical power attenuation of LED causes the lost of life of sensor and works unreliablely, simultaneously, because the dust in the industrial production environment very easily influences the transparent of photoelectric sensor optical mirror slip, causes photoelectric sensor erroneous judgement disconnected.
The utility model content
Technical problem to be solved in the utility model just provides a kind of ultrasound examination sensor, and it can detect transparent material, can avoid the detection mistake that dust and led light source life-span are caused in the environment again.
Technical problem to be solved in the utility model is to realize by such technical scheme, it includes microprocessor, the ultrasonic signal radiating circuit, transmitting probe and receiving transducer, microprocessor produces driving pulse, carry out power amplification through the ultrasonic signal radiating circuit, drive transmitting probe and send ultrasound wave, it is characterized in that: also comprise the ultrasonic signal amplifying circuit, detecting circuit and output amplifier, described receiving transducer obtains the ultrasound wave received signal, carrying out signal through the ultrasonic signal amplifying circuit amplifies, obtain half-wave voltage signal through detecting circuit again, carry out exporting after the power amplification through output amplifier then.
Preferably, between above-mentioned detecting circuit and output amplifier, be provided with sampling hold circuit, the input end of sampling hold circuit is connected with the detecting circuit output terminal, the output terminal of sampling hold circuit is connected with the input end of output amplifier, and the control end of sampling hold circuit is connected with the sampled signal end of microprocessor.
Because the utility model uses ultrasound wave as detection signal, having or not of testee detected, no matter whether the object material is transparent, and ultrasound wave is blocked formed signal power all equally, overcome the shortcoming of photoelectric sensor to the transparent material detection difficult.In addition, the utility model does not use LED to do light source, dispenses optical mirror slip, has avoided the decay of luminous power and the detection mistake that dust causes.The utlity model has following advantage: can detect transparent material, can avoid the detection mistake that dust and led light source life-span are caused in the environment again.
Description of drawings
Description of drawings of the present utility model is as follows:
Fig. 1 is the circuit block diagram of the ultrasonic ranging sensor of background technology;
Fig. 2 is a circuit block diagram of the present utility model;
Fig. 3 is for having increased the circuit block diagram of sampling hold circuit among Fig. 2;
Fig. 4 is the embodiment circuit diagram of Fig. 3.
Embodiment
Design concept of the present utility model is such: utilize ultrasound wave, transmitting probe and receiving transducer are fixed on the both sides of testee over against ground, be between emission and the receiving transducer as object, when generation is blocked, the signal amplitude of receiving transducer will change, and the utility model has just obtained the amplitude of this signal.
The utility model is described in further detail below in conjunction with drawings and Examples:
Referring to Fig. 2, the utility model includes microprocessor 1, ultrasonic signal radiating circuit 2, transmitting probe 3 and receiving transducer 5, microprocessor 1 produces driving pulse, carry out power amplification through ultrasonic signal radiating circuit 2, drive transmitting probe 3 and send ultrasound wave, it is characterized in that: also comprise ultrasonic signal amplifying circuit 7, detecting circuit 8 and output amplifier 9, described receiving transducer 5 obtains the ultrasound wave received signal, carrying out signal through ultrasonic signal amplifying circuit 7 amplifies, obtain half-wave voltage signal through detecting circuit 8 again, carry out exporting after the power amplification through output amplifier 9 then.
Referring to Fig. 3, be provided with sampling hold circuit 10 between detecting circuit 8 in Fig. 2 and the output amplifier 9, the input end of sampling hold circuit 10 is connected with detecting circuit 8 output terminals, the output terminal of sampling hold circuit 10 is connected with the input end of output amplifier 9, and a control end of sampling hold circuit 10 is connected with the sampled signal end of microprocessor 1.
The reason that adds sampling hold circuit 10 in the circuit is, because it is intermittence that microprocessor 1 produces driving pulse, ultrasound wave also is to be interrupted to send, the ultrasound wave transmission speed is more than the velocity of propagation of glazing not, after ultrasonic emitting probe 3 is launched ultrasonic signal, need be through after a while, receiving transducer 5 just can receive signal, add sampling hold circuit 10, after the ultrasonic waves transmitted signal arrives receiving end, open sampling hold circuit 10 and make the signal after the amplification enter output amplifier 9, the ultrasonic testing signals that can reliable reception arrives is avoided other sound wave of production scene to produce and is disturbed.
As shown in Figure 4, ultrasonic signal amplifying circuit 7 includes the first amplifier IC2A and the first follower IC2B, the input end of the first amplifier IC2A is connected with receiving transducer 5 output terminals, the output terminal of the first amplifier IC2A is connected with the input end of the first follower IC2B, and the output terminal of the first follower IC2B connects detecting circuit 8.
Be described further below in conjunction with 4 pairs of principle of work of the present utility model of accompanying drawing:
The P3.5 port output pulse train voltage of microprocessor IC1, by triode Q1 base stage, T1 boosts through the pulse transformer, drives ultrasonic emitting probe Y1 emission ultrasound wave, and at this moment, microprocessor IC1 picks up counting.Ultrasonic waves transmitted is received probe 5 and receives back generation electric signal, this signal is through capacitor C 3 couplings, enter and constitute amplifying circuit by resistance R 5, R6, R14 and the first amplifier IC2A and carry out AC signal and amplify, export by the first follower IC2B, deliver to the detecting circuit of being made up of diode D3, resistance R 8, R9, R16 and capacitor C 8, detection becomes negative half-wave voltage; At this moment, microprocessor IC1 output signal is opened sampling hold circuit 10, and signal after the amplifying circuit that resistance R 11, R12, capacitor C 6 and the second amplifier IC4A form amplifies, exports external interface to by the second follower IC4B by exploitation sample holding circuit 10.
When having object to block between transmitting probe and the receiving transducer or during partial occlusion, the signal amplitude that the ultrasound wave receiving end receives will diminish, the signal amplitude of sensor circuit output simultaneously also will change, and external control system can judge, handle according to the amplitude size of this signal.
Claims (5)
1. ultrasound examination sensor, include microprocessor (1), ultrasonic signal radiating circuit (2), transmitting probe (3) and receiving transducer (5), microprocessor (1) produces driving pulse, carry out power amplification through ultrasonic signal radiating circuit (2), drive transmitting probe (3) and send ultrasound wave, it is characterized in that: also comprise ultrasonic signal amplifying circuit (7), detecting circuit (8) and output amplifier (9), described receiving transducer (5) obtains the ultrasound wave received signal, carrying out signal through ultrasonic signal amplifying circuit (7) amplifies, obtain half-wave voltage signal through detecting circuit (8) again, carry out exporting after the power amplification through output amplifier (9) then.
2. a kind of ultrasound examination sensor according to claim 1, it is characterized in that: between described detecting circuit (8) and output amplifier (9), be provided with sampling hold circuit (10), the input end of sampling hold circuit (10) is connected with detecting circuit (8) output terminal, the output terminal of sampling hold circuit (10) is connected with the input end of output amplifier (9), and a control end of sampling hold circuit (10) is connected with the sampled signal end of microprocessor (1).
3. a kind of ultrasound examination sensor according to claim 2, it is characterized in that: described ultrasonic signal amplifying circuit (7) includes first amplifier (IC2A) and first follower (IC2B), the input end of first amplifier (IC2A) is connected with receiving transducer (5) output terminal, the output terminal of first amplifier (IC2A) is connected with the input end of first follower (IC2B), and the output terminal of first follower (IC2B) connects detecting circuit (8).
4. according to claim 2 or 3 described a kind of ultrasound examination sensors, it is characterized in that: described output amplifier (9) includes second amplifier (IC4A) and second follower (IC4B), the input end of second amplifier (IC4A) is connected with sampling hold circuit (10) output terminal, the output terminal of second amplifier (IC4A) is connected with the input end of second follower (IC4B), is exported as signal by the output terminal of second follower (IC4B).
5. a kind of ultrasound examination sensor according to claim 4 is characterized in that: described sampling hold circuit (10) comprises the LF398 sampling holder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206603137U CN201993341U (en) | 2010-12-15 | 2010-12-15 | Ultrasonic detection sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206603137U CN201993341U (en) | 2010-12-15 | 2010-12-15 | Ultrasonic detection sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201993341U true CN201993341U (en) | 2011-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206603137U Expired - Fee Related CN201993341U (en) | 2010-12-15 | 2010-12-15 | Ultrasonic detection sensor |
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| CN (1) | CN201993341U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621237A (en) * | 2012-03-12 | 2012-08-01 | 河海大学常州校区 | High-power single-pulse ultrasonic signal generator and nondestructive inspection method thereof |
| CN104856612A (en) * | 2014-02-20 | 2015-08-26 | 深圳市恒润晖光电科技有限公司 | Self-walking dust collector and garbage detecting device thereof |
| CN107885272A (en) * | 2017-11-27 | 2018-04-06 | 昆明理工大学津桥学院 | Card reader photoelectric sensor antidusting regulating circuit |
| CN108107080A (en) * | 2018-02-12 | 2018-06-01 | 无锡信大新茂科技有限责任公司 | A kind of soil moisture sensor |
-
2010
- 2010-12-15 CN CN2010206603137U patent/CN201993341U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621237A (en) * | 2012-03-12 | 2012-08-01 | 河海大学常州校区 | High-power single-pulse ultrasonic signal generator and nondestructive inspection method thereof |
| CN104856612A (en) * | 2014-02-20 | 2015-08-26 | 深圳市恒润晖光电科技有限公司 | Self-walking dust collector and garbage detecting device thereof |
| CN107885272A (en) * | 2017-11-27 | 2018-04-06 | 昆明理工大学津桥学院 | Card reader photoelectric sensor antidusting regulating circuit |
| CN107885272B (en) * | 2017-11-27 | 2023-12-19 | 昆明理工大学津桥学院 | Photoelectric sensor dust-proof voltage regulating circuit for card reader |
| CN108107080A (en) * | 2018-02-12 | 2018-06-01 | 无锡信大新茂科技有限责任公司 | A kind of soil moisture sensor |
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| DD01 | Delivery of document by public notice |
Addressee: CHONGQING DONGDENG TECHNOLOGY CO., LTD. Yang Lili Document name: Notification to Go Through Formalities of Registration |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Addressee: Yang Lili Document name: Notification to Pay the Fees |
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| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: CHONGQING DONGDENG TECHNOLOGY CO., LTD. Document name: Notification of Termination of Patent Right |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20131215 |