CN203705637U - High-precision ultrasonic range finder - Google Patents
High-precision ultrasonic range finder Download PDFInfo
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- CN203705637U CN203705637U CN201320892077.5U CN201320892077U CN203705637U CN 203705637 U CN203705637 U CN 203705637U CN 201320892077 U CN201320892077 U CN 201320892077U CN 203705637 U CN203705637 U CN 203705637U
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Abstract
The utility model discloses a high-precision ultrasonic range finder comprising an ultrasonic emission energy transducer, an ultrasonic reception energy transducer, a pulse generating circuit, a power amplification circuit, a voltage transformer circuit, a preposed amplification circuit, a secondary amplification circuit and a band-pass filtering amplification circuit, wherein a signal output end of the ultrasonic reception energy transducer is connected with a signal input end of the band-pass filtering amplification circuit orderly through the preposed amplification circuit and the secondary amplification circuit, and a signal output end of a pulse amplification circuit is connected with a signal input end of the ultrasonic emission energy transducer orderly through the power amplification circuit and the voltage transformer circuit. The high-precision ultrasonic range finder also comprises a gating circuit and an AND gate circuit. Signal output ends of both the pulse generating circuit and the gating circuit are connected with a signal input end of the AND gate circuit, and a signal output end of the AND gate circuit is connected with a signal input end of the pulse amplification circuit. The high-precision ultrasonic range finder is characterized in that the gating circuit and the AND gate circuit are fully utilized, and ultrasonic measurement precision is improved.
Description
Technical field
The utility model belongs to the improvement of supersonic range finder structure, particularly high precision ultrasonic distance measurement instrument.
Background technology
Ultrasonic ranging is a kind of typical non-contact measurement method.Because sound wave velocity of propagation in air is far smaller than light and radio velocity of wave propagation, for the requirement of time resolution much smaller than the system such as laser ranging, tellurometer survey, and ultrasound wave is not subject to the impact of the factor such as smog, air visibility in communication process, thereby is all used widely in various occasions.But ultrasonic ranging also has a lot of limitation in practical application, affect scope and the precision of ultrasonic ranging.The one, ultrasound wave is decayed greatly in air, due to the difference of measuring distance, causes the fluctuating of echoed signal, makes the echo larger error of measurement generation of time of arrival; The 2nd, ultrasonic pulse echo is broadened in receiving course, has affected the resolution of range finding, especially in-plant measurement is caused to larger impact.Other also have some factors, also can affect to measuring such as environment temperature, wind speed etc.
Utility model content
Be to provide a kind of high precision ultrasonic distance measurement instrument in the purpose of this utility model, make full use of gating circuit and AND circuit, naturally control more flexibly the time that ultrasonic continuous is sent, more be convenient to its ultrasonic receiver and identify ultrasonic signal that its ultrasonic transmitter sends, improved ultrasonic measurement precision.
The purpose of this utility model is achieved in that a kind of high precision ultrasonic distance measurement instrument, comprises ultrasound emission transducer, ultrasonic receiving transducer, pulse generating circuit, power amplification circuit, transformer circuit, pre-amplification circuit, second amplifying circuit and bandpass filtering amplifying circuit; The signal output part of ultrasonic receiving transducer is successively by the signal output part of pre-amplification circuit, second amplifying circuit connecting band pass filter amplifying circuit; The signal output part of pulse generating circuit is connected the signal input part of ultrasound emission transducer successively with transformer circuit by power amplification circuit; It is characterized in that: also comprise gating circuit, AND circuit and magnifier; Pulse generating circuit and the signal output part of arteries and veins gating circuit are connected the signal input part of AND circuit jointly, and the signal output part of AND circuit connects the signal input part of pulse generating circuit; AND circuit by the signal of the pulse signal of pulse generating circuit output and gating circuit output through synthesizing with logical operation pattern and exporting to pulse amplifying circuit, so that ultrasound emission transducer can only be, successively through transformer circuit, power amplification circuit and pulse generating circuit, so that the pulse signal of pulse generating circuit output only can flow to pulse generating circuit through AND circuit within the period in unit signal cycle of gating circuit output, ultrasonic receiving transducer only can send ultrasound wave within the period in unit signal cycle of gating circuit output.
The utility model is received signal amplification module, bandpass filtering modules block and is adopted the ultrasonic Traveltime data processing module of soft-threshold wavelet de-noising technology and time cross-correlation technique to form by transmit generation module, power driver module, secondary of high frequency ultrasound.Wherein ultrasound emission unit adopts high-frequency transducer and high driving power circuit, guarantees remote and high precision.Ultrasonic receiving element adopts two-stage high-precision meter amplifying circuit, and enlargement factor is adjustable, guarantees to receive feeble signal.Ultrasonic receiving element adopts the bandpass filter of high Q value, guarantees to receive the high s/n ratio of signal.Soft-threshold wavelet de-noising algorithm reduces ultrasonic reception signal noise, improve signal to noise ratio (S/N ratio), the time cross correlation algorithm calculate ultrasonic walk time, reach high distance accuracy.
The utility model is a kind of remote, high-precision supersonic sounding device.This device is using high-frequency transducer as ultrasonic transceiver part, drive ultrasonic transducer transmitting ultrasound wave with large power supersonic driver module, using the filtering circuit of high precision, adjustable enlargement factor and high Q value as ultrasonic receiver module, be aided with time cross-correlation technique measure ultrasonic walk time, without judging ultrasonic first broadcast time of arrival.Not only finding range is large, also has the feature of precision distance measurement.Advantage of the present utility model: 1. ultrasound emission unit adopts high-frequency transducer and high driving power circuit, guarantees remote and high precision; 2. ultrasonic receiving element adopts two-stage high-precision meter amplifying circuit (comprising pre-amplification circuit and second amplifying circuit), and enlargement factor is adjustable, guarantees to receive feeble signal; 3. ultrasonic receiving element adopts the bandpass filter of high Q value, guarantees to receive the high s/n ratio of signal; 4. adopt soft-threshold wavelet de-noising technology to reduce ultrasonic reception signal noise, improve signal to noise ratio (S/N ratio).The finding range of the utility model in atmosphere is 10m, and distance accuracy is 1 ‰.
The utility model makes full use of gating circuit and AND circuit, naturally controls more flexibly the time that ultrasonic continuous is sent, and is more convenient to its ultrasonic receiver and identifies ultrasonic signal that its ultrasonic transmitter sends, and has improved ultrasonic measurement precision.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is the overall circuit syndeton schematic diagram of the utility model ultrasonic transmitter;
Fig. 2 is the overall circuit syndeton schematic diagram of the utility model ultrasonic receiver.
Embodiment
A kind of high precision ultrasonic distance measurement instrument, as shown in Figure 1 and Figure 2, comprises ultrasound emission transducer, ultrasonic receiving transducer, pulse generating circuit, power amplification circuit, transformer circuit, pre-amplification circuit, second amplifying circuit and bandpass filtering amplifying circuit; The signal output part of ultrasonic receiving transducer is successively by the signal input part of pre-amplification circuit, second amplifying circuit connecting band pass filter amplifying circuit; The signal output part of pulse amplifying circuit is connected the signal input part of ultrasound emission transducer successively with transformer circuit by power amplification circuit; It is characterized in that: also comprise gating circuit and AND circuit &; The signal output part of pulse generating circuit and gating circuit is connected the signal input part of AND circuit jointly, and the signal output part of AND circuit connects the signal input part of pulse amplifying circuit; AND circuit by the unit-pulse signal of the pulse signal of pulse generating circuit output and gating circuit output through synthesizing with logical operation pattern and exporting to pulse amplifying circuit, so that the pulse signal of pulse generating circuit output only can be fed to pulse generating circuit through AND circuit within the period in unit signal cycle of gating circuit output, ultrasound emission transducer is corresponding only can send ultrasound wave within the period in unit-pulse signal cycle of gating circuit output.
Claims (1)
1. a high precision ultrasonic distance measurement instrument, comprises ultrasound emission transducer, ultrasonic receiving transducer, pulse generating circuit, power amplification circuit, transformer circuit, pre-amplification circuit, second amplifying circuit and bandpass filtering amplifying circuit; The signal output part of ultrasonic receiving transducer is successively by the signal input part of pre-amplification circuit, second amplifying circuit connecting band pass filter amplifying circuit; The signal output part of pulse amplifying circuit is connected the signal input part of ultrasound emission transducer successively with transformer circuit by power amplification circuit; It is characterized in that: also comprise gating circuit and AND circuit; The signal output part of pulse generating circuit and gating circuit is connected the signal input part of AND circuit jointly, and the signal output part of AND circuit connects the signal input part of pulse amplifying circuit; AND circuit by the unit-pulse signal of the pulse signal of pulse generating circuit output and gating circuit output through synthesizing with logical operation pattern and exporting to pulse amplifying circuit, so that the pulse signal of pulse generating circuit output only can be fed to pulse generating circuit through AND circuit within the period in unit signal cycle of gating circuit output, ultrasound emission transducer is corresponding only can send ultrasound wave within the period in unit-pulse signal cycle of gating circuit output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320892077.5U CN203705637U (en) | 2013-12-31 | 2013-12-31 | High-precision ultrasonic range finder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320892077.5U CN203705637U (en) | 2013-12-31 | 2013-12-31 | High-precision ultrasonic range finder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203705637U true CN203705637U (en) | 2014-07-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320892077.5U Expired - Fee Related CN203705637U (en) | 2013-12-31 | 2013-12-31 | High-precision ultrasonic range finder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203705637U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515681B (en) * | 2015-11-30 | 2017-12-19 | 上海理工大学 | Ultrasonic communication method and its communicator |
| CN107966705A (en) * | 2016-10-19 | 2018-04-27 | 广东大仓机器人科技有限公司 | Integral ultrasonic module based on modulus sampling |
-
2013
- 2013-12-31 CN CN201320892077.5U patent/CN203705637U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515681B (en) * | 2015-11-30 | 2017-12-19 | 上海理工大学 | Ultrasonic communication method and its communicator |
| CN107966705A (en) * | 2016-10-19 | 2018-04-27 | 广东大仓机器人科技有限公司 | Integral ultrasonic module based on modulus sampling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20181231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |