CN203365674U - Adjusting device which automatically adjusts ultrasonic sensor sensitivity - Google Patents
Adjusting device which automatically adjusts ultrasonic sensor sensitivity Download PDFInfo
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- CN203365674U CN203365674U CN 201320331325 CN201320331325U CN203365674U CN 203365674 U CN203365674 U CN 203365674U CN 201320331325 CN201320331325 CN 201320331325 CN 201320331325 U CN201320331325 U CN 201320331325U CN 203365674 U CN203365674 U CN 203365674U
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Abstract
The utility model relates to an ultrasonic sensor, and particularly relates to an adjusting device which automatically adjusts ultrasonic sensor sensitivity. Technical problems needed to solve are that: with respect to the aforementioned exiting problems, the adjusting device which automatically adjusts ultrasonic sensor sensitivity is provided. A supersonic signal generated by an ultrasonic sensor in a voltage drive process via a sensor detection device is detected in real time, and whether a sensitivity signal surpasses a threshold specified by a qualified ultrasonic sensor is judged. Then a control signal is sent to the ultrasonic sensor which surpasses the sensitivity threshold via the sensor detection device. Sensitivity of the ultrasonic sensor is adjusted by driving a screw driver via a control motor so that a closed loop adjusting device is formed, and an objective of rapid detecting and correcting the sensitivity signal of the ultrasonic sensor is achieved. The adjusting device which automatically adjusts ultrasonic sensor sensitivity is mainly applicable to the field of ultrasonic sensor sensitivity detection.
Description
Technical field
The utility model relates to ultrasonic sensor, especially relates to a kind of regulating device of automatic adjusting ultrasonic sensor sensibility.
Background technology
Ultrasonic sensor with transceiver function has been widely used as obstacle detecting sensor as the vehicle-mounted parking system.The most frequently used distance-finding method of ultrasonic sensor is the clawback probe method.Ultimate principle is: utilize controller to send the ultrasound wave of certain frequency by transmitting probe, the ultrasound wave that receiving transducer fires back through barrier, only need to calculate to transmit signals to the time that receives signal, just can calculate the distance of barrier.
Yet, in the production run of prior art, because the precision of production technology is not high enough, so make with the consistance of the sensitivity of a collection of ultrasonic sensor of producing poorly, can not reach the technological parameter requirement.Therefore producing the measurement sensitivity that also needs to carry out loaded down with trivial details manual rectification ultrasonic sensor later.Greatly improve production cost, reduced production efficiency.
The utility model content
Technical problem to be solved in the utility model is: for the problem of above-mentioned existence, a kind of regulating device of automatic adjusting ultrasonic sensor sensibility is provided, it detects ultrasonic sensor in voltage driving process in real time by sensor detecting device, the ultrasonic signal produced, and judge whether sensitivity signal surpasses the threshold value of qualified ultrasonic sensor regulation, then by sensor detecting device, the ultrasonic sensor that surpasses the threshold of sensitivity is sent to control signal, regulate the sensitivity of ultrasonic sensor by controlling the driven by motor screwdriver, formed a closed loop adjustment device, reach fast detecting and correct the ultrasonic sensor sensibility signal.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of regulating device of automatic adjusting ultrasonic sensor sensibility comprises:
Ultrasonic sensor; For sending ultrasonic sensor to the detection of obstacles barrier; Detect the ultrasonic signal that barrier returns and be converted into ac voltage signal for receiving simultaneously;
The ultrasonic sensor pick-up unit, the ac voltage signal obtained after sending ultrasonic signal and run into barrier for detection of ultrasonic sensor, and the output control signal is to the ultrasonic sensor regulating device;
The ultrasonic sensor regulating device, the control signal and then the adjusting ultrasonic sensor that for receiving the ultrasonic sensor pick-up unit, send, make the sensitivity of ultrasonic sensor reach the error allowed band;
The ultrasonic sensor stationary installation, for the mounting ultrasonic sensor;
Described ultrasonic sensor pick-up unit input port is connected with ultrasonic sensor; Ultrasonic sensor pick-up unit output terminal is connected with ultrasonic sensor regulating device input end; Ultrasonic sensor regulating device output terminal and ultrasonic sensor carry out Surface Contact, ultrasonic sensor built-in with the ultrasonic sensor stationary installation.
Further, described ultrasonic sensor stationary installation is the closed cavity of a bottom end opening, described ultrasonic sensor bottom contacts with ultrasonic sensor stationary installation top end surface, described signal electrode line, ultrasonic sensor output negative pole line are connected with the ultrasonic detection device input end by ultrasonic sensor stationary installation bottom end opening, and described ultrasonic sensor stationary installation is a nonconducting housing.
Further, described ultrasonic sensor comprises cylindrical outer casing, piezoelectric element, the signal electrode line, the signal negative line, sealant layer, the sound-absorbing element layer, card extender, positive lead, negative lead, described cylindrical outer casing inner sealing one end is the cylindrical outer casing bottom face, described cylindrical outer casing 1 bottom face and piezoelectric element negative pole are bonding, described sound-absorbing element layer lower surface covers the positive pole-face of piezoelectric element, cylindrical outer casing bottom face and cylindrical outer casing inwall, the Baltimore groove that described sealant layer sealing sound-absorbing element layer upper surface and cylindrical outer casing inwall form, described card extender 7 is arranged in sealant layer, described signal electrode line one end, signal negative line one end is connected with the ultrasonic sensor pick-up unit respectively, the signal electrode line other end is connected with positive lead one end by card extender, the anodal welding of the positive lead other end and piezoelectric element, the described signal negative line other end connects by card extender negative lead one end, the described negative lead other end and the welding of cylindrical outer casing madial wall, characterized by further comprising between sealant layer and sound-absorbing element layer the cork layer is set, described card extender is provided with tapped through hole, and described card extender is provided with the cylindrical outer casing upper surface opening equated with tapped through-hole diameter to the cylindrical outer casing upper surface, described ultrasonic sensor stationary installation bottom end opening is the opening of an and equal diameters corresponding with opening, described ultrasonic sensor regulating device output terminal is by after passing through ultrasonic sensor stationary installation top end opening, cylindrical outer casing upper surface opening successively, ultrasonic sensor regulating device output terminal is installed in tapped through hole 11, and the upper surface of ultrasonic sensor regulating device output terminal and cork layer is flexibly connected.
Further, described sound-absorbing element layer is foaming glue-line or acoustical cotton layer.
Further, described ultrasonic sensor pick-up unit comprises:
The ultrasonic sensor feed circuit, be converted to the operating voltage of ultrasonic sensor for the pulse signal by processor output;
Signal processing circuit, amplified, after amplitude limit, filtering, peak detection process, be converted to d. c. voltage signal and be sent to comparator circuit for the ac voltage signal that ultrasonic sensor is detected and exports;
Comparator circuit, for signal processing circuit output signal and ultrasonic sensor sensibility signal threshold value are compared, obtain comparative result;
Processor, export control signal to the ultrasonic sensor regulating device for the comparative result according to comparator circuit output;
Described processor the first output terminal is connected with ultrasonic sensor feed circuit input end, described processor the second output terminal is connected with ultrasonic sensor regulating device input end, described ultrasonic sensor feed circuit the first output terminal, ultrasonic sensor feed circuit the second output terminal respectively with ultrasonic sensor signal electrode line, ultrasonic sensor signal negative line connects, described ultrasonic sensor signal electrode line is connected with the comparator circuit input end by signal processing circuit, comparator circuit the first output terminal, relatively low the second output terminal respectively with the processor first input end, processor the second input end connects.
Further, the ultrasonic sensor feed circuit comprise on-off circuit, energy transfer circuit, feeder ear, described processor the first output control terminal is connected with the on-off circuit control end, the on-off circuit output terminal is connected with the energy transfer circuit first input end, and energy output circuit the first output terminal, energy output circuit the second output terminal are connected with ultrasonic sensor signal electrode line, ultrasonic sensor signal negative line respectively; When the on-off circuit input end grounding, energy transfer circuit the second output terminal is connected with feeder ear; When the on-off circuit input end is connected with feeder ear, energy transfer circuit the second output head grounding.
Further, comparator circuit comprises the first comparer, the second comparer, described signal processing circuit output terminal is connected with the first comparator input terminal, the second comparator input terminal, and the first comparator output terminal, the second comparator output terminal are connected with the processor input end respectively.
Further, described signal processing circuit comprises amplifying circuit, amplitude limiter circuit, bandpass filter, peak detection circuit, rectification circuit, described amplifying circuit, amplitude limiter circuit, bandpass filter device, peak detection circuit, rectification circuit connect successively, described ultrasonic sensor signal electrode line one end is connected with input amplifier, and described rectification circuit output end is connected with the comparator circuit input end.
Further, described ultrasonic sensor regulating device comprises bidirectional, dc motor, adjustable side, adjusting bolt, described processor output terminal is connected with bidirectional, dc Electric Machine Control end, described adjusting bolt bottom is connected with through hole 11 internal threads, described direct current generator output terminal rotates by adjusting bolt top, adjustable side, and the adjusting bolt top drives the adjusting bolt bottom and rotates.
Further, described adjustable side is screwdriver.
Described cylindrical outer casing is metal material.
From above-mentioned architectural feature of the present utility model, can find out, its advantage is:
Ultrasonic sensor pick-up unit, ultrasonic sensor regulating device, ultrasonic sensor have formed a regulating device that ultrasonic sensor is regulated in closed-loop control, can facilitate the sensitivity signal of regulating automatically ultrasonic sensor.Reduced the adjusting operation, greatly reduced production costs, and the sensitivity signal parameter of raising ultrasonic sensor reaches consistent.
The accompanying drawing explanation
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is improved ultrasonic sensor structural representation in the utility model:
Fig. 2 is one of them embodiment fundamental diagram of the utility model;
Fig. 3 is the structural drawing of embodiment mono-ultrasonic sensor feed circuit in the utility model;
Fig. 4 is the structural drawing of embodiment bis-ultrasonic sensor feed circuit in the utility model;
Fig. 5 is embodiment mono-comparator circuit structural drawing in the utility model.
Reference numeral:
1-cylindrical outer casing 2-piezoelectric element 3-signal electrode line
4-signal negative line 5-sealant layer 6-sound-absorbing element layer
7-card extender 8-positive lead 9-negative lead
The tapped through hole 12-of 10-cork layer 11-opening
Q1-first comparer Q2 the second comparer.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
One, the utility model related description:
1, cylindrical outer casing 1 inner bottom end face and piezoelectric element negative pole face are bonding by viscose glue, and described viscose glue has electric conductivity, and the piezoelectric element negative pole is bonding with the cylindrical outer casing inwall, cylindrical outer casing inwall ground connection.The positive pole-face of piezoelectric element 2 refers to the face at the anodal place of piezoelectric element, is exactly specifically the relative end face of piezoelectric element negative pole face.
2, the effect of card extender is just by signal electrode line and positive lead UNICOM, by signal negative line and negative lead UNICOM.
3, the piezoelectric element effect is: utilize the principle of piezoelectric effect that electric energy and ultrasound wave are transformed mutually.
4, the sound-absorbing element layer is foamed silica gel layer or acoustical cotton layer, and the acoustical cotton layer is formed by acoustical cotton, and the foaming glue-line is filled and formed by foamed glue.
5, cylindrical outer casing is metal material.
6, sensitivity: mainly depend on and manufacture wafer itself, electromechanical coupling factor is large, highly sensitive, otherwise sensitivity is low.The upper limit threshold of ultrasonic sensor, lower threshold are linear corresponding relation with upper sensitivity limit value, lower sensitivity limit threshold value respectively.By the comparison with upper limit threshold, lower threshold, ultrasonic sensor is detected to the detection that ultrasonic signal that barrier returns is converted into ac voltage signal, adjusting in proportion the sensitivity of ultrasonic sensor.Realized the design's purpose.
7, positive lead, negative lead are thinner than signal electrode line, signal negative line respectively, are convenient to the signal of welding Continuity signal electrode line, signal negative line.
8, the ultrasonic sensor stationary installation is a nonconducting plastic casing.
Two: principle of work of the present utility model:
Ultrasonic sensor pick-up unit, ultrasonic sensor regulating device, ultrasonic sensor have formed a regulating device that ultrasonic sensor is regulated in closed-loop control, can facilitate the sensitivity signal of regulating automatically ultrasonic sensor, specifically:
1) ultrasonic sensor in the utility model (function that possesses sending and receiving one ultrasonic sensor signal) transmission ultrasonic sensor breaks the barriers while returning to the ultrasonic sensor signal, ultrasonic sensor receives and detects the barrier return signal, and is converted into ac voltage signal;
2) signal processing circuit of ultrasonic sensor pick-up unit detects ac voltage signal by ultrasonic sensor and exports signal processing circuit to, through amplifying circuit in signal processing circuit, amplitude limiter circuit, bandpass filter, peak detection circuit and rectification circuit, and the voltage signal after rectification is passed through respectively to the first comparer one input end, the second comparer one input end, described another input end of the first comparer, another input end of the second comparer is set to respectively ultrasonic sensor alternating voltage upper limit threshold, ultrasonic sensor alternating voltage lower threshold, when the ac voltage signal of ultrasonic sensor output is greater than or equal to upper limit threshold, the first comparer output low level signal " 0 ", while the second comparer output low level signal " 0 ", when the ac voltage signal of ultrasonic sensor output is between upper limit threshold, lower threshold, the first comparator output terminal output high level signal " 1 ", the second comparator output terminal output low level signal " 0 " simultaneously, when ultrasonic sensor output AC voltage signal is less than or equal to lower threshold, the first comparator output terminal output high level signal " 1 ", the second comparator output terminal output high level signal " 1 ".
3) processor is by detecting respectively and the first comparator output terminal, the state value of the port that the second comparator output terminal connects, when the first comparator output terminal output high level signal " 0 ", while the second comparator output terminal output low level signal " 0 ", processor input end input signal binary code is " 00 ", processor output control signal is controlled the motor forward, by external part regulate adjusting bolt by the cork lamination to the ultrasonic sensor bottom face, make the sensitivity of ultrasonic sensor descend, until ultrasonic sensor sensibility is in threshold range, when the first comparator output terminal output high level signal " 1 ", while the second comparator output terminal output low level signal " 0 ", processor input end input signal is binary code " 10 ", and processor is not exported control signal, does not need sensitivity is regulated, when the first comparator output terminal output high level signal " 1 ", while the second comparator output terminal output low level signal " 1 ", processor input end input signal is binary code " 11 ", processor output control signal is controlled motor reversal, by external part regulate adjusting bolt by the cork lamination to ultrasonic sensor bottom face reverse direction (when initial before ultrasonic sensor is regulated, the cork layer has individual precompression to the sound-absorbing element layer, when unclamping the cork layer, the sound-absorbing element layer unclamps by precompression, make ultrasonic sensor sensibility improve), make the sensitivity of ultrasonic sensor rise, until ultrasonic sensor sensibility is in threshold range.
Three: as described in Figure 1, the utility model device comprises:
Ultrasonic sensor; For sending ultrasonic sensor to the detection of obstacles barrier; Detect the ultrasonic signal that barrier returns and be converted into ac voltage signal for receiving simultaneously;
The ultrasonic sensor pick-up unit, the ac voltage signal obtained after sending ultrasonic signal and run into barrier for detection of ultrasonic sensor, and the output control signal is to the ultrasonic sensor regulating device;
The ultrasonic sensor regulating device, the control signal and then the adjusting ultrasonic sensor that for receiving the ultrasonic sensor pick-up unit, send, make the sensitivity of ultrasonic sensor reach the error allowed band;
The ultrasonic sensor stationary installation, for the mounting ultrasonic sensor;
Described ultrasonic sensor pick-up unit input port is connected with ultrasonic sensor; Ultrasonic sensor pick-up unit output terminal is connected with ultrasonic sensor regulating device input end; Ultrasonic sensor regulating device output terminal and ultrasonic sensor carry out Surface Contact, ultrasonic sensor built-in with the ultrasonic sensor stationary installation.
Four: each device forms:
41) ultrasonic sensor
As shown in Figure 1, ultrasonic sensor comprises cylindrical outer casing, piezoelectric element, the signal electrode line, the signal negative line, sealant layer, the sound-absorbing element layer, card extender, positive lead, negative lead, described cylindrical outer casing inner sealing one end is the cylindrical outer casing bottom face, and described cylindrical outer casing bottom face and piezoelectric element negative pole are bonding, and described sound-absorbing element layer lower surface covers the positive pole-face of piezoelectric element, cylindrical outer casing bottom face and cylindrical outer casing inwall, the Baltimore groove that described sealant layer sealing sound-absorbing element layer upper surface and cylindrical outer casing inwall form, described card extender is arranged in sealant layer, described signal electrode line one end, signal negative line one end is connected with the ultrasonic sensor pick-up unit respectively, the signal electrode line other end is connected with positive lead one end by card extender, the anodal welding of the positive lead other end and piezoelectric element, the described signal negative line other end connects by card extender negative lead one end, the described negative lead other end and the welding of cylindrical outer casing madial wall, wherein between sealant layer and sound-absorbing element layer, the cork layer is set, described card extender is provided with tapped through hole 11, and described card extender 7 is provided with the opening 12 with tapped through hole 11 equal diameters to the cylindrical outer casing upper surface, described ultrasonic sensor regulating device output terminal is installed in tapped through hole 11 by opening 12, and the upper surface of ultrasonic sensor regulating device output terminal and cork layer is flexibly connected.
42) ultrasonic sensor pick-up unit
Comprise ultrasonic sensor feed circuit, signal processing circuit, comparator circuit, processor.
421) ultrasonic sensor feed circuit
Comprise on-off circuit, energy transfer circuit, feeder ear, described processor the first output control terminal is connected with the on-off circuit control end, the on-off circuit output terminal is connected with the energy transfer circuit first input end, and energy output circuit the first output terminal, energy output circuit the second output terminal are connected with ultrasonic sensor signal electrode line, ultrasonic sensor signal negative line respectively; As shown in Figure 3, when the on-off circuit input end grounding, energy transfer circuit the second output terminal is connected with feeder ear; As shown in Figure 4, when the on-off circuit input end is connected with feeder ear, energy transfer circuit the second output head grounding.
Wherein energy transfer circuit comprises transformer or mutual inductor etc., when the on-off circuit input end grounding, energy transfer circuit the second input end (transformer secondary one end) connects feeder ear, when on-off circuit input termination feeder ear, energy transfer circuit the second input end (transformer secondary one end) ground connection.Wherein the turn ratio of transformer secondary, transformer primary side is that energy during according to the work of feeder ear energy and ultrasonic sensor is calculated.Now processor is control transformer secondary one end ground connection (connecing feeder ear) to the control signal of on-off circuit output, and form pressure reduction with the transformer secondary other end, and recently produce by the number of turn of transformer primary side and secondary the operating voltage that meets ultrasonic sensor.The principle of work of mutual inductor is similar with said process.
Wherein on-off circuit comprises it being triode or switch.Wherein the on-off circuit control end refers to the control end of transistor base, switch, and emitter or switch that the on-off circuit input end refers to triode are connected an end (or referring to switch ground connection one end) with power supply.
422) signal processing circuit
Comprise amplifying circuit, amplitude limiter circuit, bandpass filter, peak detection circuit and rectification circuit.Also can realize by the cx20106 chip.
423) comparator circuit
Comprise two comparers, as shown in Figure 5, the ac voltage signal that signal processing circuit receives ultrasonic sensor process is processed, be converted into d. c. voltage signal, and export to than the first comparer, the second comparer, the first comparer, the upper limit threshold that the second comparer is pressed the direct current electric of input signal and himself arranged, lower threshold is (respectively with the upper limit threshold of ultrasonic sensor sensibility signal, lower threshold is corresponding) compare respectively, if (likely be less than the ultrasonic sensor sensibility minimum value outside the ultrasonic sensor sensibility scope, also likely be greater than the ultrasonic sensor sensibility maximal value), by the ultrasonic sensor regulating device, by the degree of tightness of adjusting bolt, regulate the sensitivity of ultrasonic sensor.
43, ultrasonic sensor regulating device
Comprise bidirectional, dc motor, adjustable side, adjusting bolt.
431) bidirectional, dc Electric Machine Control end refers to the output signal of processor that receives the ultrasonic sensor pick-up unit, and controls the bidirectional, dc motor and do positive movement or counter motion.
432) adjustable side: adjustable side one end is connected with control bidirectional, dc motor positive movement or heterodromous terminal, and the adjustable side other end is regulated adjusting bolt along being moved up and down on the ultrasonic sensor axis.
Disclosed all features in this instructions, except mutually exclusive feature, all can combine by any way.
Disclosed arbitrary feature in this instructions (comprising any accessory claim, summary and accompanying drawing), unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is,, unless special narration, each feature is an example in a series of equivalences or similar characteristics.
Claims (10)
1. a regulating device of automatically regulating ultrasonic sensor sensibility is characterized in that comprising:
Ultrasonic sensor; For sending ultrasonic sensor to the detection of obstacles barrier; Detect the ultrasonic signal that barrier returns and be converted into ac voltage signal for receiving simultaneously;
The ultrasonic sensor pick-up unit, the ac voltage signal obtained after sending ultrasonic signal and run into barrier for detection of ultrasonic sensor, and the output control signal is to the ultrasonic sensor regulating device;
The ultrasonic sensor regulating device, the control signal and then the adjusting ultrasonic sensor that for receiving the ultrasonic sensor pick-up unit, send, make the sensitivity of ultrasonic sensor reach the error allowed band;
The ultrasonic sensor stationary installation, for the mounting ultrasonic sensor;
Described ultrasonic sensor pick-up unit input port is connected with ultrasonic sensor; Ultrasonic sensor pick-up unit output terminal is connected with ultrasonic sensor regulating device input end; Ultrasonic sensor regulating device output terminal and ultrasonic sensor carry out Surface Contact, ultrasonic sensor built-in with the ultrasonic sensor stationary installation.
2. the regulating device of a kind of automatic adjusting ultrasonic sensor sensibility according to claim 1, it is characterized in that described ultrasonic sensor stationary installation is the closed cavity of a bottom end opening, described ultrasonic sensor bottom contacts with ultrasonic sensor stationary installation top end surface, described signal electrode line, ultrasonic sensor output negative pole line are connected with the ultrasonic detection device input end by ultrasonic sensor stationary installation bottom end opening, and described ultrasonic sensor stationary installation is a nonconducting housing.
3. the regulating device of a kind of automatic adjusting ultrasonic sensor sensibility according to claim 2, is characterized in that described sound-absorbing element layer is foaming glue-line or acoustical cotton layer.
4. the regulating device of a kind of automatic adjusting ultrasonic sensor sensibility according to claim 1, it is characterized in that described ultrasonic sensor comprises cylindrical outer casing, piezoelectric element, the signal electrode line, the signal negative line, sealant layer, the sound-absorbing element layer, card extender, positive lead, negative lead, described cylindrical outer casing inner sealing one end is the cylindrical outer casing bottom face, described cylindrical outer casing bottom face and piezoelectric element negative pole are bonding, described sound-absorbing element layer lower surface covers the positive pole-face of piezoelectric element, cylindrical outer casing bottom face and cylindrical outer casing inwall, the Baltimore groove that described sealant layer sealing sound-absorbing element layer upper surface and cylindrical outer casing inwall form, described card extender is arranged in sealant layer, described signal electrode line one end, signal negative line one end is connected with the ultrasonic sensor pick-up unit respectively, the signal electrode line other end is connected with positive lead one end by card extender, the anodal welding of the positive lead other end and piezoelectric element, the described signal negative line other end connects by card extender negative lead one end, the described negative lead other end and the welding of cylindrical outer casing madial wall, also be included between sealant layer and sound-absorbing element layer the cork layer is set, described card extender is provided with tapped through hole, and described card extender is provided with the cylindrical outer casing upper surface opening equated with tapped through-hole diameter to the cylindrical outer casing upper surface, described ultrasonic sensor stationary installation bottom end opening is the opening of an and equal diameters corresponding with opening, described ultrasonic sensor regulating device output terminal is by after passing through ultrasonic sensor stationary installation top end opening, cylindrical outer casing upper surface opening successively, ultrasonic sensor regulating device output terminal is installed in tapped through hole, and the upper surface of ultrasonic sensor regulating device output terminal and cork layer is flexibly connected.
5. the regulating device of a kind of automatic adjusting ultrasonic sensor sensibility according to claim 3 is characterized in that described ultrasonic sensor pick-up unit comprises:
The ultrasonic sensor feed circuit, be converted to the operating voltage of ultrasonic sensor for the pulse signal by processor output;
Signal processing circuit, after processing for the ac voltage signal that ultrasonic sensor is detected and exports, be converted to d. c. voltage signal and be sent to comparator circuit;
Comparator circuit, for signal processing circuit output signal and ultrasonic sensor sensibility signal threshold value are compared, obtain comparative result;
Processor, export control signal to the ultrasonic sensor regulating device for the comparative result according to comparator circuit output;
Described processor the first output terminal is connected with ultrasonic sensor feed circuit input end, described processor the second output terminal is connected with ultrasonic sensor regulating device input end, described ultrasonic sensor feed circuit the first output terminal, ultrasonic sensor feed circuit the second output terminal respectively with ultrasonic sensor signal electrode line, ultrasonic sensor signal negative line connects, described ultrasonic sensor signal electrode line is connected with the comparator circuit input end by signal processing circuit, comparator circuit the first output terminal, relatively low the second output terminal respectively with the processor first input end, processor the second input end connects.
6. the regulating device of a kind of automatic adjusting ultrasonic sensor sensibility according to claim 5, it is characterized in that described ultrasonic sensor feed circuit comprise on-off circuit, energy transfer circuit, feeder ear, described processor the first output control terminal is connected with the on-off circuit control end, the on-off circuit output terminal is connected with the energy transfer circuit first input end, and energy output circuit the first output terminal, energy output circuit the second output terminal are connected with ultrasonic sensor signal electrode line, ultrasonic sensor signal negative line respectively; When the on-off circuit input end grounding, energy transfer circuit the second output terminal is connected with feeder ear; When the on-off circuit input end is connected with feeder ear, energy transfer circuit the second output head grounding.
7. the regulating device of a kind of automatic adjusting ultrasonic sensor sensibility according to claim 5, it is characterized in that described comparator circuit comprises the first comparer, the second comparer, described signal processing circuit output terminal is connected with the first comparator input terminal, the second comparator input terminal, and the first comparator output terminal, the second comparator output terminal are connected with the processor input end respectively.
8. the regulating device of a kind of automatic adjusting ultrasonic sensor sensibility according to claim 5, it is characterized in that described signal processing circuit comprises amplifying circuit, amplitude limiter circuit, bandpass filter, peak detection circuit, rectification circuit, described amplifying circuit, amplitude limiter circuit, bandpass filter device, peak detection circuit, rectification circuit connect successively, described ultrasonic sensor signal electrode line one end is connected with input amplifier, and described rectification circuit output end is connected with the comparator circuit input end.
9. according to the regulating device of the described a kind of automatic adjusting ultrasonic sensor sensibility of one of claim 1 to 8, it is characterized in that described ultrasonic sensor regulating device comprises bidirectional, dc motor, adjustable side, adjusting bolt, described processor output terminal is connected with bidirectional, dc Electric Machine Control end, described adjusting bolt bottom is connected with the through hole internal thread, described direct current generator output terminal rotates by adjusting bolt top, adjustable side, and the adjusting bolt top drives the adjusting bolt bottom and rotates.
10. the regulating device of a kind of automatic adjusting ultrasonic sensor sensibility according to claim 9, is characterized in that described adjustable side is screwdriver.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320331325 CN203365674U (en) | 2013-06-09 | 2013-06-09 | Adjusting device which automatically adjusts ultrasonic sensor sensitivity |
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| CN 201320331325 CN203365674U (en) | 2013-06-09 | 2013-06-09 | Adjusting device which automatically adjusts ultrasonic sensor sensitivity |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535988A (en) * | 2014-12-05 | 2015-04-22 | 常州波速传感器有限公司 | Ultrasonic sensor |
| CN105510903A (en) * | 2015-12-30 | 2016-04-20 | 华晨汽车集团控股有限公司 | Device for automatically adjusting consistency of ultrasonic sensors |
| CN107606738A (en) * | 2017-09-29 | 2018-01-19 | 康泰医学系统（秦皇岛）股份有限公司 | Ultrasound signal receipt detects circuit and application |
| CN108226908A (en) * | 2017-12-26 | 2018-06-29 | 清华大学苏州汽车研究院（吴江） | A kind of ultrasonic sensor remained shock and sensitivity test method and system |
| CN109031259A (en) * | 2018-07-24 | 2018-12-18 | 常州波速传感器有限公司 | Ultrasonic probe |
| CN110907866A (en) * | 2019-12-13 | 2020-03-24 | 中国人民解放军国防科技大学 | Working point real-time optimization system of giant magneto-impedance sensor and giant magneto-impedance sensor |
| CN110907939A (en) * | 2018-09-14 | 2020-03-24 | 同致电子科技（厦门）有限公司 | Ultrasonic sensor |
| CN114543975A (en) * | 2022-01-25 | 2022-05-27 | 青岛歌尔智能传感器有限公司 | Sensitivity calibration circuit, calibration method and device |
-
2013
- 2013-06-09 CN CN 201320331325 patent/CN203365674U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535988A (en) * | 2014-12-05 | 2015-04-22 | 常州波速传感器有限公司 | Ultrasonic sensor |
| CN105510903A (en) * | 2015-12-30 | 2016-04-20 | 华晨汽车集团控股有限公司 | Device for automatically adjusting consistency of ultrasonic sensors |
| CN107606738A (en) * | 2017-09-29 | 2018-01-19 | 康泰医学系统（秦皇岛）股份有限公司 | Ultrasound signal receipt detects circuit and application |
| CN107606738B (en) * | 2017-09-29 | 2023-08-08 | 康泰医学系统（秦皇岛）股份有限公司 | Ultrasonic signal receiving and detecting circuit and application |
| CN108226908A (en) * | 2017-12-26 | 2018-06-29 | 清华大学苏州汽车研究院（吴江） | A kind of ultrasonic sensor remained shock and sensitivity test method and system |
| CN108226908B (en) * | 2017-12-26 | 2021-10-08 | 清华大学苏州汽车研究院（吴江） | Method and system for testing residual vibration and sensitivity of ultrasonic sensor |
| CN109031259A (en) * | 2018-07-24 | 2018-12-18 | 常州波速传感器有限公司 | Ultrasonic probe |
| CN110907939A (en) * | 2018-09-14 | 2020-03-24 | 同致电子科技（厦门）有限公司 | Ultrasonic sensor |
| CN110907866A (en) * | 2019-12-13 | 2020-03-24 | 中国人民解放军国防科技大学 | Working point real-time optimization system of giant magneto-impedance sensor and giant magneto-impedance sensor |
| CN114543975A (en) * | 2022-01-25 | 2022-05-27 | 青岛歌尔智能传感器有限公司 | Sensitivity calibration circuit, calibration method and device |
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