CN101936769A - Phase difference measuring apparatus of ultrasonic sensor - Google Patents
Phase difference measuring apparatus of ultrasonic sensor Download PDFInfo
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- CN101936769A CN101936769A CN 201010217238 CN201010217238A CN101936769A CN 101936769 A CN101936769 A CN 101936769A CN 201010217238 CN201010217238 CN 201010217238 CN 201010217238 A CN201010217238 A CN 201010217238A CN 101936769 A CN101936769 A CN 101936769A
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- circuit
- phase difference
- phase
- ultrasonic sensor
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Abstract
The invention discloses a phase difference measuring apparatus of an ultrasonic sensor, which is internally provided with a preposing amplifying circuit, a paraphrase circuit, a phase-shifting circuit, a single-chip phase difference measuring circuit, an automatic gain control circuit, a subtraction circuit, an A/D converting circuit and an LED drive circuit, wherein one end of the preposing amplifying circuit is connected with a signal source while the other end is sequentially connected with the paraphrase circuit and the phase-shifting circuit; the phase-shifting circuit is connected to a first input end of the single-chip phase difference measuring circuit which is provided with the phase difference measuring circuit, and a second input end is connected with a pickup head through the automatic gain control circuit; and the output end is connected with the LED display through the subtraction circuit, the A/D converting circuit and the LED drive circuit. The invention can be used for directly, quickly and precisely measuring the phase difference of the ultrasonic sensor with the measurement range of 0-180 degrees and the error of less than 0.2 degree. The invention can digitally display the measurement result and observe the waveform and the phase difference of two paths of signals by using an oscillograph, thereby the invention is very convenient and practical.
Description
Technical field
The present invention relates to a kind of measuring instrument of sensor performance parameter, especially a kind of measuring instrument of measuring the ultrasonic sensor phase differential is used for the ultrasonic sensor production field.
Background technology
There is not the problem of phase differential in ultrasonic sensor when using separately.Therefore the problem that does not also have measure phase difference, but in directed sound equipment, ultrasonic sensor is that cluster uses, this just requires the transmitter, phase basically identical of each ultrasonic sensor, can make so just that through-put power is unlikely cancels out each other, the method of measuring the ultrasonic sensor phase differential at present is the oscillograph observation method, and this mode measuring error is big, and measuring speed is slow.
Summary of the invention
In order to overcome the deficiencies in the prior art, the objective of the invention is to overcome the deficiency of existing ultrasound wave method for measuring phase difference, the ultrasonic sensor phase difference measurement that a kind of measuring speed is fast, measuring accuracy is high instrument is provided.
The present invention is achieved through the following technical solutions:
A kind of ultrasonic sensor phase difference measurement instrument, it is characterized in that, its inside is provided with pre-amplification circuit, phase inverter, phase-shift circuit, monolithic phase difference measurements circuit, automatic gain control circuit, subtraction circuit, A/D change-over circuit and led drive circuit, wherein, pre-amplification circuit one end is connected with signal source, the other end and phase inverter and phase-shift circuit are linked in sequence, phase-shift circuit then is connected to the first input end of monolithic phase difference measurements chip, monolithic phase difference measurements chip is provided with phase difference measuring circuit, second input end of monolithic phase difference measurements chip is connected with pick-up head by automatic gain control circuit, and the output terminal of monolithic phase difference measurements chip is through being provided with the subtracter of subtraction circuit, the A/D converter that is provided with the A/D change-over circuit is connected with light-emitting diode display with led drive circuit.
The invention has the beneficial effects as follows: the present invention can be directly perceived, fast, the accurate phase differential of measuring ultrasonic sensor, its measurement range is 0 ~ 180 degree, measuring error is less than 0.2 degree, and in addition, the present invention shows measurement result by the light-emitting diode display numeral, and the waveform and the phase differential of available oscillograph observation two paths of signals, very convenient and practical.
Description of drawings
Fig. 1 is the structural representation of one embodiment of the invention;
Fig. 2 is the test block diagram of ultrasonic sensor phase differential.
Main Reference numeral implication is among the figure:
1, monolithic phase difference measurements chip 2, signal source 3, pick-up head
4, light-emitting diode display 5, subtracter 6, A/D converter
7, ultrasonic sensor
Embodiment
Below in conjunction with accompanying drawing, describe the specific embodiment of the present invention in detail:
Fig. 1 is the structural representation of one embodiment of the invention.
As shown in Figure 1: ultrasonic sensor phase difference measurement instrument, its inside is provided with pre-amplification circuit, phase inverter, phase-shift circuit, monolithic phase difference measurements circuit, automatic gain control circuit, subtraction circuit, A/D change-over circuit and led drive circuit, wherein, pre-amplification circuit one end is connected with signal source 2, the other end and phase inverter and phase-shift circuit are linked in sequence, phase-shift circuit then is connected to the first input end of monolithic phase difference measurements chip 1, monolithic phase difference measurements chip 1 is provided with phase difference measuring circuit, second input end of monolithic phase difference measurements chip 1 is connected with pick-up head 3 by automatic gain control circuit, and the subtracter 5 of the output terminal of monolithic phase difference measurements chip 1 through being provided with subtraction circuit, the A/D converter 6 that is provided with the A/D change-over circuit is connected with light-emitting diode display 4 with led drive circuit.
At first the signal to signal source 2 outputs amplifies by pre-amplification circuit, regulates the phase place of reference signal with phase inverter and phase-shift circuit, and reference signal is added to first input end of monolithic phase difference measurements chip 1; Secondly, the signal of pick-up head 3 is carried out automatic gain control through automatic gain control circuit, make pick-up head 3 amplitude output signal basically identicals, and it is added to second input end of monolithic phase difference measurements chip 1; The output of last monolithic phase difference measurements chip 1 is through subtracter 5, and A/D converter 6 directly shows on light-emitting diode display 4 by led drive circuit.The characteristics of circuit design of the present invention are that the phase place of reference signal is adjustable, are zero so that make the phase differential of reference signal and reference signal.
Fig. 2 is the test block diagram of ultrasonic sensor phase differential.
As shown in Figure 2: the signal source 2 with certain frequency drives ultrasonic sensor 7, and transmitting with pick-up head 3 these ultrasonic sensors 7 of reception, measure the phase differential between signal source 2 and the pick-up head 3, regulate this phase differential make it to equal zero (promptly with the phase place of this ultrasonic sensor 7 as the reference phase place); Measure the phase differential between other ultrasonic sensors and the pick-up head 3 then, the phase differential of Here it is relative reference ultrasonic sensor.
Fixed phase: Φ
c=Φ
0+ ΔΦ
D1
Wherein: Φ
0The initial phase of-signal generator, ΔΦ
D1The phase differential of-circuit 1.
Detected element phase place: Φ
x=Φ
0+ ΔΦ
UT+ ΔΦ
k+ ΔΦ
S+ ΔΦ
D2
Wherein: ΔΦ
UTThe phase differential of-ultrasonic sensor, ΔΦ
k-air Jie transmission delay phase differential.
ΔΦ
S-pick-up head phase differential, ΔΦ
D2-circuit 2 phase differential.
The fixed phase difference ΔΦ of element 1
1=Φ
X1-Φ c=ΔΦ
UT1+ ΔΦ
k+ ΔΦ
S+ ΔΦ
D2-ΔΦ
D1
The fixed phase difference ΔΦ of element 2
2=Φ
X2-Φ c=ΔΦ
UT2+ ΔΦ
k+ ΔΦ
S+ ΔΦ
D2-ΔΦ
D1
Phase differential ΔΦ=the ΔΦ of element 2 and element 1
2-ΔΦ
1=ΔΦ
UT2-ΔΦ
UT1
Regulate ΔΦ
D1, make ΔΦ
D1=ΔΦ
UT1+ ΔΦ
k+ ΔΦ
S+ ΔΦ
D2, so ΔΦ
1=0.
Phase differential ΔΦ=the ΔΦ of element 2 and element 1
2
Below disclose the present invention with preferred embodiment, so it is not in order to restriction the present invention, and all employings are equal to replaces or technical scheme that the equivalent transformation mode is obtained, all drops within protection scope of the present invention.
Claims (1)
1. ultrasonic sensor phase difference measurement instrument, it is characterized in that, its inside is provided with pre-amplification circuit, phase inverter, phase-shift circuit, monolithic phase difference measurements circuit, automatic gain control circuit, subtraction circuit, A/D change-over circuit and led drive circuit, wherein, pre-amplification circuit one end is connected with signal source, the other end and phase inverter and phase-shift circuit are linked in sequence, phase-shift circuit then is connected to the first input end of monolithic phase difference measurements chip, monolithic phase difference measurements chip is provided with phase difference measuring circuit, second input end of monolithic phase difference measurements chip is connected with pick-up head by automatic gain control circuit, and the output terminal of monolithic phase difference measurements chip is through being provided with the subtracter of subtraction circuit, the A/D converter that is provided with the A/D change-over circuit is connected with light-emitting diode display with led drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010217238 CN101936769A (en) | 2010-07-05 | 2010-07-05 | Phase difference measuring apparatus of ultrasonic sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010217238 CN101936769A (en) | 2010-07-05 | 2010-07-05 | Phase difference measuring apparatus of ultrasonic sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101936769A true CN101936769A (en) | 2011-01-05 |
Family
ID=43390217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010217238 Pending CN101936769A (en) | 2010-07-05 | 2010-07-05 | Phase difference measuring apparatus of ultrasonic sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101936769A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037363A (en) * | 2018-01-30 | 2018-05-15 | 吉林省广播电视研究所(吉林省新闻出版广电局科技信息中心) | A kind of electronic signal phase difference measuring apparatus and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1113320A (en) * | 1993-07-12 | 1995-12-13 | 株式会社东芝 | Apparatus for and method of measuring difference of phases |
| JPH0915276A (en) * | 1995-06-29 | 1997-01-17 | Asia Electron Inc | Phase measuring device |
| JPH0966044A (en) * | 1995-08-31 | 1997-03-11 | Shimadzu Corp | Mr imaging device |
| CN1543087A (en) * | 2003-04-29 | 2004-11-03 | Lg������ʽ���� | Apparatus and method for calibrating reception signal in mobile communication system |
| CN101685113A (en) * | 2008-09-24 | 2010-03-31 | 北京北广科技股份有限公司 | Method and device for measuring phase shift |
| CN201754106U (en) * | 2010-07-05 | 2011-03-02 | 俞富林 | Phase difference measuring instrument for ultrasonic wave sensor |
-
2010
- 2010-07-05 CN CN 201010217238 patent/CN101936769A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1113320A (en) * | 1993-07-12 | 1995-12-13 | 株式会社东芝 | Apparatus for and method of measuring difference of phases |
| JPH0915276A (en) * | 1995-06-29 | 1997-01-17 | Asia Electron Inc | Phase measuring device |
| JPH0966044A (en) * | 1995-08-31 | 1997-03-11 | Shimadzu Corp | Mr imaging device |
| CN1543087A (en) * | 2003-04-29 | 2004-11-03 | Lg������ʽ���� | Apparatus and method for calibrating reception signal in mobile communication system |
| CN101685113A (en) * | 2008-09-24 | 2010-03-31 | 北京北广科技股份有限公司 | Method and device for measuring phase shift |
| CN201754106U (en) * | 2010-07-05 | 2011-03-02 | 俞富林 | Phase difference measuring instrument for ultrasonic wave sensor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037363A (en) * | 2018-01-30 | 2018-05-15 | 吉林省广播电视研究所(吉林省新闻出版广电局科技信息中心) | A kind of electronic signal phase difference measuring apparatus and method |
| CN108037363B (en) * | 2018-01-30 | 2023-08-01 | 吉林省广播电视研究所(吉林省新闻出版广电局科技信息中心) | Device and method for measuring phase difference of electronic signals |
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Application publication date: 20110105 |
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