CN105333925A - Supersonic liquid level measuring instrument based on single-chip microcomputer - Google Patents
Supersonic liquid level measuring instrument based on single-chip microcomputer Download PDFInfo
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- CN105333925A CN105333925A CN201410402066.3A CN201410402066A CN105333925A CN 105333925 A CN105333925 A CN 105333925A CN 201410402066 A CN201410402066 A CN 201410402066A CN 105333925 A CN105333925 A CN 105333925A
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Abstract
Provided is a supersonic liquid level measuring instrument based on a single-chip microcomputer. The invention provides a liquid level measuring instrument whose detection component does not contact with a measured medium, and the measuring instrument is wide in measuring range and can measure low-temperature mediums. An energy transducer is not provided with movable parts, and is long in life. The liquid level measuring instrument is high in supersonic wave capture capability, and is more intelligent and has higher accuracy and reliability. The measuring instrument comprises a single-chip microcomputer module, a supersonic emission module, a supersonic reception and capture module, and a LED display circuit module. One pin output port of the single-chip microcomputer module is connected with the supersonic emission module. After the supersonic emission module gives out a signal, the supersonic reception and capture module receives the signal. The signal is processed by a first operational amplifier and a second operational amplifier, and then is processed by an integrated phase-lock loop decoder, and is output. The integrated phase-lock loop decoder is connected with an input end pin of the single-chip microcomputer module. The other two pins in the single-chip microcomputer module are connected with an externally-connected LED display circuit. The single-chip microcomputer module is also connected with a sound velocity regulation module and a time-delay regulation module through external output ports.
Description
Technical field
The present invention relates to a kind of level measuring instrument, is particularly a kind of SCM Based Ultrasonic Liquid Level Indicator.
Background technology
Along with the development of society, the mode of level gauging all adopts aptitude manner to measure; Current domestic general use special IC (as LM1812) designs ultrasonic range finder, but the cost of special IC is very high, and not display, operate very inconvenient.
With ultrasonic measuring liquid level, there is following outstanding advantage: detecting element can not contact with measured medium, can scope be surveyed wide; The liquid level of cryogenic media can be measured; Transducer is without movable member, and the life-span is long.
Conventional ultrasound measuring instrument adopts monopulse chronometry to measure, concrete principle is: ultrasound wave transmitting probe outwards launches the ultrasound wave of certain frequency under drive singal effect, start timing launching counter in the same time, ultrasound wave returns after encountering liquid level immediately, and after receiving transducer receives echo, counter stops timing immediately.Timer clock between be exactly ultrasound wave come and go time, liquid level to be measured can be calculated thus.
Above-mentioned measuring method relies on the echo triggered timer received to stop timing, but in echoed signal, signal to noise ratio (S/N ratio) is poor, makes timer time error comparatively large, thus affects measuring accuracy, cause measuring accuracy lower.
Ultrasonic meter kind of the prior art also has a lot, but mostly has the shortcoming that measuring accuracy is on the low side, error is large; Concrete reference Chinese utility model patent, the patent No. is: 201120151083.6, it discloses a kind of Multifunctional ultrasonic wave measuring instrument, be made up of ultrasound wave generation module, ultrasound wave receiving processing module and central data processing module, described central data processing module comprises counter module, function selecting module, ultrasonic velocity measurement process submodule, supersonic sounding process submodule, ultrasonic thickness measurement degree submodule, ultrasonic liquid-level measurement process submodule and post-processing module.Referring again to Chinese invention patent, the patent No. is: 200910258169.6, it discloses a kind of ultrasonic meter to comprise, but be not limited to transmitter, receiver and counter, wherein transmitter is to the fluid emission series of ultrasound wave pulse signal with bubble and/or particle, this a succession of ultrasonic pulse string signal, this succession of ultrasonic pulse signal is reflected by the bubble in fluid and/or particle, becomes a succession of reflected signal; Receiver receives this succession of reflected signal; Counter calculates multiple related coefficient by performing relevant treatment to a succession of Received signal strength exported from receiver, and carrys out the physical quantity of Fluid Computation based on described multiple related coefficient.
In view of above defect, be necessary to provide a kind of Ultrasonic Liquid Level Indicator that can overcome above-mentioned defect in fact.
Summary of the invention
The present invention is exactly for the problems referred to above, makes up the deficiencies in the prior art, provides a kind of detecting element not contact with measured medium, can survey the liquid level that scope is wide, can measure cryogenic media; Transducer is without movable member, and the life-span is long, and ultrasound wave capturing ability higher, have more intelligent and more pin-point accuracy and reliability.
For realizing above-mentioned purpose of the present invention, the present invention adopts following technical scheme.
A kind of SCM Based Ultrasonic Liquid Level Indicator of the present invention comprises: one-chip computer module, ultrasound wave transmitter module, ultrasound wave receive capture module, LED display circuit module; Its design feature is: a pin output port of one-chip computer module is connected with ultrasound wave transmitter module, after ultrasound wave transmitter module sends signal, receives capture module Received signal strength by ultrasound wave; Signal by after the first operational amplifier and the second operational amplifier process, then exports and is connected with one-chip computer module input end pin after integrated phase-locked loop decoder processes; Two other pin in the middle of one-chip computer module is connected with external LED display circuit, and one-chip computer module also outside output be connected to velocity of sound adjusting module and time delay adjusting module.
As a preferred embodiment of the present invention, the single-chip microcomputer model that one-chip computer module of the present invention adopts is 89C51, using 89C51 single-chip microcomputer as the ultrasonic liquid level measuring of master element, circuit and measurement and control program; Integrated phase-locked loop demoder is LM567, as ultrasound examination element.
Further, an output pin P1.7 of the single-chip microcomputer of described one-chip computer module sends the square wave of about 40kHz, and square wave exports to ultrasound wave transmitter module, and the timer simultaneously in one-chip computer module starts timing.
Further, described ultrasound wave transmitter module is made up of triode T, sends ultrasonic signal through triode T process.
As another kind of preferred version of the present invention, described ultrasound wave receives capture module and is processed by the first operational amplifier A 1, second operational amplifier A 2 and integrated phase-locked loop demoder received ultrasonic signal that LM567 forms to come.
In addition, the timer of described one-chip computer module is ultrasound wave from the time being transmitted into reception
t;one-chip computer module calculates distance and flows to LED display circuit module.
The invention has the beneficial effects as follows.
The present invention adopts integrated phase-locked loop demoder LM567 as ultrasound examination element, using 89C51 single-chip microcomputer as the principle of the ultrasonic liquid level measuring of master element, circuit and measurement and control program.
Have with ultrasonic measuring liquid level and do not contact with measured medium, cryogenic media can be measured, without advantages such as movable member, life-span are long.
The price of system can be reduced using LM567 as ultrasound examination element, improve ultrasound wave capturing ability; Adopt single-chip microcomputer to control hyperacoustic launching and receiving, and calculate liquid level, detection is had higher intelligent.
Accompanying drawing explanation
Fig. 1 is the measuring system circuit diagram of a kind of SCM Based Ultrasonic Liquid Level Indicator of the present invention.
Fig. 2 is the program flow diagram of a kind of SCM Based Ultrasonic Liquid Level Indicator of the present invention.
Wherein, 1 be one-chip computer module, 2 for ultrasound wave transmitter module, 3 for ultrasound wave receive capture module, 4 for LED display circuit module, 5 for velocity of sound adjusting module, 6 be time delay adjusting module.
Embodiment
As shown in Figure 1, be the measuring system circuit diagram of a kind of SCM Based Ultrasonic Liquid Level Indicator of the present invention.Figure comprises: one-chip computer module 1, ultrasound wave transmitter module 2, ultrasound wave receive capture module 3, LED display circuit module 4; Wherein a pin output port of one-chip computer module 1 is connected with ultrasound wave transmitter module 2, after ultrasound wave transmitter module 2 sends signal, receives capture module 3 Received signal strength by ultrasound wave; Signal by after the first operational amplifier and the second operational amplifier process, then exports and is connected with one-chip computer module input end pin after integrated phase-locked loop decoder processes; Two other pin in the middle of one-chip computer module 1 is connected with external LED display circuit 4, and one-chip computer module 1 is and outside output is connected to velocity of sound adjusting module 5 and time delay adjusting module 6.
In Fig. 1, the single-chip microcomputer model that one-chip computer module 1 of the present invention adopts is 89C51, using 89C51 single-chip microcomputer as the ultrasonic liquid level measuring of master element, circuit and measurement and control program; Integrated phase-locked loop demoder is LM567, as ultrasound examination element.An output pin P1.7 of the single-chip microcomputer of one-chip computer module 1 of the present invention sends the square wave of about 40kHz, and square wave exports to ultrasound wave transmitter module 2, and the timer simultaneously in one-chip computer module 1 starts timing.Ultrasound wave of the present invention receives capture module 3 and is processed by the first operational amplifier A 1, second operational amplifier A 2 and integrated phase-locked loop demoder received ultrasonic signal that LM567 forms to come.The timer of one-chip computer module 1 of the present invention is ultrasound wave from the time being transmitted into reception
t;one-chip computer module 1 calculates distance and flows to LED display circuit module 4.
Below in conjunction with accompanying drawing, principle of work process of the present invention is described, be first that the square wave square wave exporting about 40kHz by the pin P1.7 of one-chip computer module 1 exports to ultrasound wave transmitter module 2, the timer simultaneously in one-chip computer module 1 starts timing; Then and then ultrasound wave reception capture module 3 received ultrasonic signal processes, and timer is ultrasound wave from the time being transmitted into reception
t;one-chip computer module 1 calculates distance and flows to LED display circuit module 4.
Claims (6)
1. a SCM Based Ultrasonic Liquid Level Indicator, comprising: one-chip computer module (1), ultrasound wave transmitter module (2), ultrasound wave receive capture module (3), LED display circuit module (4), it is characterized in that: a pin output port of one-chip computer module (1) is connected with ultrasound wave transmitter module (2), after ultrasound wave transmitter module (2) sends signal, receive capture module (3) Received signal strength by ultrasound wave; Signal by after the first operational amplifier and the second operational amplifier process, then exports and is connected with an input end pin of one-chip computer module (1) after integrated phase-locked loop decoder processes; Two other pin in the middle of one-chip computer module (1) is connected with external LED display circuit (4), and one-chip computer module also outside output be connected to velocity of sound adjusting module (5) and time delay adjusting module (6).
2. the SCM Based Ultrasonic Liquid Level Indicator of one according to claim 1, it is characterized in that: the single-chip microcomputer model that described one-chip computer module (1) adopts is 89C51, using 89C51 single-chip microcomputer as the ultrasonic liquid level measuring of master element, circuit and measurement and control program; Integrated phase-locked loop demoder is LM567, as ultrasound examination element.
3. the SCM Based Ultrasonic Liquid Level Indicator of one according to claim 1, it is characterized in that: an output pin P1.7 of the single-chip microcomputer of described one-chip computer module (1) sends the square wave of about 40kHz, square wave exports to ultrasound wave transmitter module (2), and the timer simultaneously in one-chip computer module (1) starts timing.
4. the SCM Based Ultrasonic Liquid Level Indicator of one according to claim 3, is characterized in that: described ultrasound wave transmitter module (2) is made up of triode T, sends ultrasonic signal through triode T process.
5. the SCM Based Ultrasonic Liquid Level Indicator of one according to claim 4, is characterized in that: described ultrasound wave receives capture module (3) and processed by the first operational amplifier A 1, second operational amplifier A 2 and integrated phase-locked loop demoder received ultrasonic signal that LM567 forms to come.
6. the SCM Based Ultrasonic Liquid Level Indicator of one according to claim 1, is characterized in that: the timer of described one-chip computer module (1) is ultrasound wave from the time being transmitted into reception
t;one-chip computer module (1) calculates distance and flows to LED display circuit module (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410402066.3A CN105333925A (en) | 2014-08-15 | 2014-08-15 | Supersonic liquid level measuring instrument based on single-chip microcomputer |
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| CN201410402066.3A CN105333925A (en) | 2014-08-15 | 2014-08-15 | Supersonic liquid level measuring instrument based on single-chip microcomputer |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109471663A (en) * | 2018-10-30 | 2019-03-15 | 珠海格力智能装备有限公司 | The execution method and device of SCM program |
| US20220178879A1 (en) * | 2020-12-04 | 2022-06-09 | Perceptive Sensor Technologies, Inc. | Multi-bounce acoustic signal material detection |
| US11729537B2 (en) | 2020-12-02 | 2023-08-15 | Perceptive Sensor Technologies, Inc. | Variable angle transducer interface block |
| US11788904B2 (en) | 2020-12-04 | 2023-10-17 | Perceptive Sensor Technologies, Inc. | Acoustic temperature measurement in layered environments |
| US11846537B2 (en) | 2019-05-31 | 2023-12-19 | Perceptive Sensor Technologies, Inc. | Non-linear ultrasound method and apparatus for quantitative detection of materials |
| US11860014B2 (en) | 2022-02-11 | 2024-01-02 | Perceptive Sensor Technologies, Inc. | Acoustic signal detection of material composition in static and dynamic conditions |
| US11940420B2 (en) | 2022-07-19 | 2024-03-26 | Perceptive Sensor Technologies, Inc. | Acoustic signal material identification with nanotube couplant |
| US11946905B2 (en) | 2020-12-30 | 2024-04-02 | Perceptive Sensor Technologies, Inc. | Evaluation of fluid quality with signals |
-
2014
- 2014-08-15 CN CN201410402066.3A patent/CN105333925A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109471663A (en) * | 2018-10-30 | 2019-03-15 | 珠海格力智能装备有限公司 | The execution method and device of SCM program |
| CN109471663B (en) * | 2018-10-30 | 2022-04-05 | 珠海格力智能装备有限公司 | Method and device for executing single chip microcomputer program |
| US11846537B2 (en) | 2019-05-31 | 2023-12-19 | Perceptive Sensor Technologies, Inc. | Non-linear ultrasound method and apparatus for quantitative detection of materials |
| US11729537B2 (en) | 2020-12-02 | 2023-08-15 | Perceptive Sensor Technologies, Inc. | Variable angle transducer interface block |
| US20220178879A1 (en) * | 2020-12-04 | 2022-06-09 | Perceptive Sensor Technologies, Inc. | Multi-bounce acoustic signal material detection |
| US11788904B2 (en) | 2020-12-04 | 2023-10-17 | Perceptive Sensor Technologies, Inc. | Acoustic temperature measurement in layered environments |
| US11994494B2 (en) * | 2020-12-04 | 2024-05-28 | Perceptive Sensor Technologies, Inc. | Multi-bounce acoustic signal material detection |
| US11946905B2 (en) | 2020-12-30 | 2024-04-02 | Perceptive Sensor Technologies, Inc. | Evaluation of fluid quality with signals |
| US11860014B2 (en) | 2022-02-11 | 2024-01-02 | Perceptive Sensor Technologies, Inc. | Acoustic signal detection of material composition in static and dynamic conditions |
| US11940420B2 (en) | 2022-07-19 | 2024-03-26 | Perceptive Sensor Technologies, Inc. | Acoustic signal material identification with nanotube couplant |
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Application publication date: 20160217 |