CN202057365U - Ultrasonic wave advance-signal self-adapting circuit under pressure variation state - Google Patents
Ultrasonic wave advance-signal self-adapting circuit under pressure variation state Download PDFInfo
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- CN202057365U CN202057365U CN2011201380620U CN201120138062U CN202057365U CN 202057365 U CN202057365 U CN 202057365U CN 2011201380620 U CN2011201380620 U CN 2011201380620U CN 201120138062 U CN201120138062 U CN 201120138062U CN 202057365 U CN202057365 U CN 202057365U
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Abstract
An ultrasonic wave advance-signal self-adapting circuit under a pressure variation state relates to an improvement for an advance signal processing circuit of an ultrasonic wave receiving circuit. The ultrasonic wave advance-signal self-adapting circuit under a pressure variation state is suitable for the equipment such as an ultrasonic gas flowmeter, an ultrasonic wave liquid concentration measuring instrument and a gas component analyzer under a gas pressure variation state. The advance-signal self-adapting circuit according to the utility model is obtained through connecting the following components through a circuit: a high-precision digital potentiometer, a high-precision operational amplifier, a MCU controller, a detector circuit, an analog/digital converter, a pressure sensor and an impedance match output circuit. A supersonic wave echo receiving signal realizes semi-automatic self-adapting initial adjustment for a gas pressure signal according to pre-input components and advance pressure central value through the high-precision digital potentiometer, the high-precision operational amplifier and self-adapting algorithm software. Through parameter setting, the ultrasonic wave advance-signal self-adapting circuit under a pressure variation state is configured to a pressure-accompanying self-adapting state, and real-time pressure variation self-adapting control is realized. The ultrasonic wave advance-signal self-adapting circuit under the pressure variation state has the following advantages: simple and novel structure, facilitation for realizing digital calibration of production, and capability of being applied for various kinds of ultrasonic wave detecting apparatuses and equipment.
Description
Technical field
Ultrasound wave advance signal adaptive circuit under the pressure variable condition, relate to the improvement of the advance signal treatment circuit of ultrasound wave receiving circuit, be suitable for the ultrasonic gas flowmeter that is under the gas pressure change state, ultrasonic liquid concentration measuring apparatus, equipment such as gas composition analyser.
Background technology
Ultrasound wave receiving circuit in the existing ultrasonic gas flowmeter, its advance signal treatment circuit all are to adopt amplifying circuit, several gain multiple of fixed gain multiple manually to select or kind method such as mechanical potentiometer adjustment.Because preposition ultrasonic signal treatment circuit is to the scope of application decisive role of ultrasonic gas flowmeter.In actual applications, the power of preposition ultrasound wave received signal except relevant with ultrasonic propagation distance (sound path), also will be subjected to size, the variation of gaseous tension, the influence of gas composition.Ultrasonic gas flowmeter is in actual working state, gaseous tension is fluctuation within the specific limits often, and the variation of pressure is very big to the amplitude influence of ultrasonic signal, the gap that hundred times is arranged, this has caused very large difficulty to follow-up treatment circuit, existing method is according to the pressure usable range, adjust the resistance value of mechanical potentiometer and then change gain amplifier, make to be suitable in the pressure limit signal can not because of the excessive distorted signals of pressure can not be because pressure be too small signal door can not triggering sound the time, often the pressure scope of application is smaller in the fixed gain that the use mechanical potentiometer is adjusted, and can't realize real-time follow-up in case pressure changes.The adjustment of mechanical potentiometer is cumbersome, can not realize online adjustment, be not easy to realize the digital quantization processing of preamplifier gain, be unfavorable for recovering to dispatch from the factory the preamplifier gain value, inconvenient with dispatch from the factory gain control value comparison and then carry out intellectuality diagnosis, providing the accurate data of probe maintenance or replacing.
Summary of the invention
Deficiency at existing ultrasound wave received signal preposing signal process circuit, the inventor is by studying for a long period of time, it is simple, novel to have designed a kind of circuit structure, convenient for production, be not only applicable to that pressure range is wide, the gas with various component, and be beneficial to ultrasound wave advance signal adaptive circuit under the pressure variable condition of intelligent diagnosis.
The utility model adaptive circuit, by high precision operating amplifier, the high accuracy number potentiometer, detecting circuit, the MCU controller, A/D converter, pressure transducer, impedance matching output circuit connect to form through circuit.
During the work of the utility model ultrasound wave advance signal adaptive circuit, the ultrasonic echo received signal enters high precision operating amplifier, by high precision operating amplifier, high accuracy number potentiometer and adaptive algorithm software, can carry out the semi-automatic self-adaptation initial adjustment of signal gain amplifier according to gas composition, the preposition Center of Pressure value of input in advance, by pressure transducer or pressure unit, making can be by the parameter setting, be configured to pressure follow self-adaptation state, realize that real-time pressure changes adaptive control.The MCU controller is according to the component that is provided with or the component of acquiescence, calculate the amplifier gain that needs, a step is converted into the digital regulation resistance resistance again, and be provided with in the high accuracy number potentiometer by the MCU controller, the signal that the MCU controller can constantly come out to detection by detecting circuit is gathered by A/D converter.At pressure is to import under the manual input mode, if pressure input value and real difference are bigger, the MCU controller can provide estimated value according to default algorithm software and do reference, simultaneously can output alarm information.If pressure utilizes pressure transducer to carry out obtaining under the real-time drainage pattern, the MCU controller carries out Adaptive Fuzzy Control according to three parameters of real-time pressure of the sensor of the real-time image data of the component of component that is provided with or acquiescence, ultrasound wave rectified signal, pressure, can provide actual pre-amp gain simultaneously.The pressure transducer online in real time is checked out pressure changing, by the MCU controller, calculate the controlling value of preamplifier gain needs according to algorithm software, the resistance that changes the high accuracy number potentiometer then realizes PGA, gain resolution can reach 256Temp, and its voltage gain is fully linear, effectively prevents from or avoided pressure to change to cause controlling value system oscillation, transports to subsequent conditioning circuit through the signal of adaptive control through the impedance matching output circuit.
The utility model ultrasound wave advance signal adaptive circuit is simple in structure, novel, be beneficial to the digitalized calibration of realize producing and easy to use, gain resolution can reach 256Temp, and gain effect is good and stable, can effectively improve the signal adaptation scope of ultrasonic flow meter.
Description of drawings
Fig. 1 is the utility model ultrasound wave advance signal adaptive circuit synoptic diagram.
Embodiment
The utility model ultrasound wave advance signal adaptive circuit, by high precision operating amplifier, the high accuracy number potentiometer, the MCU controller, detecting circuit, A/D converter, pressure transducer, the impedance matching output circuit connects to form by circuit.
High precision operating amplifier is connected with high accuracy number potentiometer, impedance matching output circuit, detecting circuit, and the MCU controller is connected with high accuracy number potentiometer, A/D converter, pressure transducer, and detecting circuit is connected with A/D converter.
When the utility model signal adaptive circuit works online, the ultrasonic signal of high precision operating amplifier receiving transducer, behind high precision operating amplifier, be transferred to the high accuracy number potentiometer, the combining adaptive algorithm software, the utility model adaptive circuit carries out semi-automatic self-adaptation initial adjustment according to gas composition, the preposition Center of Pressure value of input in advance to signal, pass through pressure transducer, through the parameter setting, be configured to pressure follow self-adaptation state, realize that real-time pressure changes adaptive control.The MCU controller is according to the component that is provided with or the component of acquiescence, be converted into the digital regulation resistance resistance after calculating the amplifier gain that needs, and be provided with in the high accuracy number potentiometer by the MCU controller, the signal that the MCU controller can constantly come out to detection by detecting circuit is gathered by A/D converter, the pressure transducer online in real time is checked out pressure changing, by the MCU controller, calculate the controlling value of preamplifier gain needs according to algorithm software, the resistance that changes the high accuracy number potentiometer then realizes PGA.When pressure is following time of manual input mode, the force value of input and actually differ bigger, the MCU controller can provide estimated value according to default algorithm software and do reference, simultaneously can output alarm information.If pressure utilizes pressure transducer to carry out obtaining under the real-time drainage pattern, the MCU controller carries out adaptive control according to three parameters of real-time pressure of the sensor of the real-time image data of the component of component that is provided with or acquiescence, ultrasound wave rectified signal, pressure, provide actual pre-amp gain simultaneously, export subsequent conditioning circuit to through the impedance matching output circuit through the signal of adaptive control.The utility model ultrasound wave advance signal adaptive circuit gain resolution reaches 256Temp, and its voltage gain is linear fully, effectively prevent from or avoided pressure to change to cause the controlling value vibration, thereby influence the operate as normal of ultrasonic gas flowmeter and check effect.
Claims (2)
1. the ultrasound wave advance signal adaptive circuit under pressure changes, comprise high precision operating amplifier, high accuracy number potentiometer, detecting circuit, A/D converter, MCU controller, pressure transducer, impedance matching output circuit, it is characterized in that: high precision operating amplifier is connected with high accuracy number potentiometer, impedance matching output circuit, detecting circuit, the MCU controller is connected with high accuracy number potentiometer, A/D converter, pressure transducer, and detecting circuit is connected with A/D converter.
2. signal adaptive circuit according to claim 1 is characterized in that: voltage gain is for linear, and gain resolution reaches 256Temp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201380620U CN202057365U (en) | 2011-05-04 | 2011-05-04 | Ultrasonic wave advance-signal self-adapting circuit under pressure variation state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201380620U CN202057365U (en) | 2011-05-04 | 2011-05-04 | Ultrasonic wave advance-signal self-adapting circuit under pressure variation state |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202057365U true CN202057365U (en) | 2011-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201380620U Expired - Lifetime CN202057365U (en) | 2011-05-04 | 2011-05-04 | Ultrasonic wave advance-signal self-adapting circuit under pressure variation state |
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| CN (1) | CN202057365U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108014402A (en) * | 2012-04-05 | 2018-05-11 | 费雪派克医疗保健有限公司 | Respiratory auxiliary system |
| CN109443464A (en) * | 2018-12-21 | 2019-03-08 | 丹东源声中科电子有限公司 | A kind of reception circuit of passive listening sonar flowmeter |
-
2011
- 2011-05-04 CN CN2011201380620U patent/CN202057365U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108014402A (en) * | 2012-04-05 | 2018-05-11 | 费雪派克医疗保健有限公司 | Respiratory auxiliary system |
| CN109443464A (en) * | 2018-12-21 | 2019-03-08 | 丹东源声中科电子有限公司 | A kind of reception circuit of passive listening sonar flowmeter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111130 |