CN204330044U - For the infrared communication circuit of ultrasonic flow meter - Google Patents
For the infrared communication circuit of ultrasonic flow meter Download PDFInfo
- Publication number
- CN204330044U CN204330044U CN201520030020.3U CN201520030020U CN204330044U CN 204330044 U CN204330044 U CN 204330044U CN 201520030020 U CN201520030020 U CN 201520030020U CN 204330044 U CN204330044 U CN 204330044U
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- triode
- resistance
- electric capacity
- phototriode
- flow meter
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Abstract
The utility model is provided for the infrared communication circuit of ultrasonic flow meter, solves the problem that existing ultrasonic flow meter cannot normally work under daylight or incandescent lamp; Its scheme is, comprises triode Q1, triode Q2, triode Q3, phototriode U1, electric capacity C1, electric capacity C2, electric capacity C3, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7 and inductance L 1; The utility model structure is simple, and when on daylight or incandescent bulb to phototriode, phototriode produces direct current, and by the stopping direct current effect of partiting dc capacitor C1, triode Q2 ends, and correspondingly, triode Q3 also ends; When having signal to input, triode Q2 and triode Q3 is in conducting state, amplification input signal, thus solves the problem that existing ultrasonic flow meter cannot normally work under the environment of daylight or incandescent lamp.
Description
Technical field
The utility model relates to ultrasonic flow meter technology field, in particular for the infrared communication circuit of ultrasonic flow meter.
Background technology
Ultrasonic flow meter is that the one of ultrasonic detecting technology is used, and Ultrasonic Detection is a kind of Non-Destructive Testing.The object that ultrasound wave can penetrate electromagnetic wave, light wave cannot penetrate, can reflect on two kinds of materials (acoustic reactance hinders different materials) interface again simultaneously, due to the unevenness of interior of articles, ultrasonic attenuation is died down, thus crackle in object, the defect such as loose can be recorded.
Ultrasonic flow meter is by ultrasonic transducer, electronic circuit and flow indication and accumulation system three part composition, the electronic circuit of ultrasonic flow meter comprises transmitting, receive, signal transacting and display circuit, the transient flow recorded and cumulative flow value digital quantity or analog quantity display, ultrasound transmitting transducer converts electrical energy into ultrasonic energy, and be transmitted in detected fluid, the ultrasonic signal that receiver receives, through electronic circuit amplify and be converted to represent flow electric signal supply display and integrating meter carry out showing and integrating, so just achieve detection and the display of flow.
Piezoelectric transducer commonly used by ultrasonic flow meter, and it utilizes the piezoelectric effect of piezoelectric, adopts the radiating circuit of fitting out that electric energy is added on the piezoelectric element of transmitting transducer, makes it produce ultrasound wave vibration.Ultrasound wave is injected in fluid at an angle and is propagated, and is then received by receiving transducer, and becomes electric energy through piezoelectric element, to detect, transmitting transducer utilizes the inverse piezoelectric effect of piezoelectric element, and receiving transducer is then utilize piezoelectric effect.
The signal circuit used in ultrasonic flow meter is mainly infrared communication circuit, current infrared communication circuit does not generally adopt anti-interference process, daylight or incandescent lamp etc. have stronger infrared ray, they can make photodiode or the direct conducting of phototriode, thus affect the use of ultrasonic flow meter.
Summary of the invention
For above-mentioned situation, for overcoming the defect of prior art, the object of the utility model is exactly the infrared communication circuit being provided for ultrasonic flow meter, effectively solves the problem that existing ultrasonic flow meter cannot normally work under daylight or incandescent lamp.
Its technical scheme solved is, comprise triode Q1, triode Q2, triode Q3, phototriode U1, electric capacity C1, electric capacity C2, electric capacity C3, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7 and inductance L 1, one end of the base stage contact resistance R1 of described triode Q1, another termination signal input part of resistance R1, the grounded emitter GND of triode Q1, the collector of triode Q1 connects 2 pins of phototriode U1, 1 pin of phototriode U1 meets power supply VCC, 6 pins of phototriode U1 are unsettled, 5 pins of phototriode U1 meet power supply VCC, one end of the 4 pin contact resistance R2 of phototriode U1, the other end ground connection GND of resistance R2, 4 pins of phototriode U1 also connect one end of electric capacity C1, one end of the other end contact resistance R3 of electric capacity C1, another termination power VCC of resistance R3, the other end of electric capacity C1 also connects the positive pole of diode D3, one end of the negative pole contact resistance R4 of diode D3, the other end ground connection GND of resistance R4, the base stage of the other end connecting triode Q2 of electric capacity C1, the emitter of triode Q2 meets power supply VCC, one end of the collector contact resistance R5 of triode Q2, the other end ground connection GND of resistance R5, the base stage of the collector of triode Q2 also connecting triode Q3, one end of the emitter contact resistance R7 of triode Q3, the other end ground connection GND of resistance R7, one end of the collector contact resistance R6 of triode Q3, another termination power VCC of resistance R6, the collector of triode Q3 also connects one end of electric capacity C2, the other end ground connection GND of electric capacity C2, one end of electric capacity C2 connects one end of inductance L 1, the other end of inductance L 1 connects one end of electric capacity C3, the other end ground connection GND of electric capacity C3, one end of electric capacity C3 is also signal output part OUT.
The utility model structure is simple, and when on daylight or incandescent bulb to phototriode, phototriode produces direct current, and by the stopping direct current effect of partiting dc capacitor C1, triode Q2 ends, and correspondingly, triode Q3 also ends; When having signal to input, triode Q2 and triode Q3 is in conducting state, amplification input signal, thus solves the problem that existing ultrasonic flow meter cannot normally work under the environment of daylight or incandescent lamp.
Accompanying drawing explanation
Fig. 1 is circuit theory connection layout of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
Provided by Fig. 1, the utility model comprises triode Q1, triode Q2, triode Q3, phototriode U1, electric capacity C1, electric capacity C2, electric capacity C3, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7 and inductance L 1, one end of the base stage contact resistance R1 of described triode Q1, another termination signal input part of resistance R1, the grounded emitter GND of triode Q1, the collector of triode Q1 connects 2 pins of phototriode U1, 1 pin of phototriode U1 meets power supply VCC, 6 pins of phototriode U1 are unsettled, 5 pins of phototriode U1 meet power supply VCC, one end of the 4 pin contact resistance R2 of phototriode U1, the other end ground connection GND of resistance R2, 4 pins of phototriode U1 also connect one end of electric capacity C1, one end of the other end contact resistance R3 of electric capacity C1, another termination power VCC of resistance R3, the other end of electric capacity C1 also connects the positive pole of diode D3, one end of the negative pole contact resistance R4 of diode D3, the other end ground connection GND of resistance R4, the base stage of the other end connecting triode Q2 of electric capacity C1, the emitter of triode Q2 meets power supply VCC, one end of the collector contact resistance R5 of triode Q2, the other end ground connection GND of resistance R5, the base stage of the collector of triode Q2 also connecting triode Q3, one end of the emitter contact resistance R7 of triode Q3, the other end ground connection GND of resistance R7, one end of the collector contact resistance R6 of triode Q3, another termination power VCC of resistance R6, the collector of triode Q3 also connects one end of electric capacity C2, the other end ground connection GND of electric capacity C2, one end of electric capacity C2 connects one end of inductance L 1, the other end of inductance L 1 connects one end of electric capacity C3, the other end ground connection GND of electric capacity C3, one end of electric capacity C3 is also signal output part OUT.
Described triode Q1 and triode Q3 is negative-positive-negative transistor, and triode Q2 is positive-negative-positive transistor.
Described electric capacity C2, inductance L 1 and electric capacity C3 connect into filtering circuit.
Ultrasonic flow meter in use, when ultrasonic flow meter works under the environment of daylight or incandescent lamp, time in the infrared radiation that daylight or incandescent lamp send to phototriode U1, phototriode U1 produces direct current, have electric capacity C1 in circuit, electric capacity C1 plays stopping direct current, and triode Q2 ends, correspondingly, triode Q3 also ends.
When signal inputs, input signal is by the base stage of electric capacity C1 to triode Q2, in order to ensure that triode Q2 is operated in quiescent point, the forward characteristic of diode D3 is used to carry out temperature compensation, the base stage of namely described triode Q2 connects the other end of electric capacity C1, one end of the base stage of triode Q2 also contact resistance R3, another termination power VCC of resistance R3, the base stage of triode Q2 also connects the positive pole of diode D3, one end of the negative pole contact resistance R4 of diode D3, the other end ground connection GND of resistance R4.The emitter junction of triode Q2 has bias voltage, triode Q2 conducting, and now, the emitter junction of triode Q3 also has bias voltage makes triode Q3 conducting, and signal amplifies output, but the stability in order to output signal, add filtering circuit in this circuit.
The utility model structure is simple, and when in the infrared radiation that daylight or incandescent lamp send to phototriode U1, phototriode U1 produces direct current, and by the stopping direct current effect of partiting dc capacitor C1, triode Q2 ends, and correspondingly, triode Q3 also ends; When having signal to input, triode Q2 and triode Q3 is in conducting state, amplification input signal, thus solves the problem that existing ultrasonic flow meter cannot normally work under the environment of daylight or incandescent lamp.
Claims (2)
1. for the infrared communication circuit of ultrasonic flow meter, comprise triode Q1, triode Q2, triode Q3, phototriode U1, electric capacity C1, electric capacity C2, electric capacity C3, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7 and inductance L 1, it is characterized in that, one end of the base stage contact resistance R1 of described triode Q1, another termination signal input part of resistance R1, the grounded emitter GND of triode Q1, the collector of triode Q1 connects 2 pins of phototriode U1, 1 pin of phototriode U1 meets power supply VCC, 6 pins of phototriode U1 are unsettled, 5 pins of phototriode U1 meet power supply VCC, one end of the 4 pin contact resistance R2 of phototriode U1, the other end ground connection GND of resistance R2, 4 pins of phototriode U1 also connect one end of electric capacity C1, one end of the other end contact resistance R3 of electric capacity C1, another termination power VCC of resistance R3, the other end of electric capacity C1 also connects the positive pole of diode D3, one end of the negative pole contact resistance R4 of diode D3, the other end ground connection GND of resistance R4, the base stage of the other end connecting triode Q2 of electric capacity C1, the emitter of triode Q2 meets power supply VCC, one end of the collector contact resistance R5 of triode Q2, the other end ground connection GND of resistance R5, the base stage of the collector of triode Q2 also connecting triode Q3, one end of the emitter contact resistance R7 of triode Q3, the other end ground connection GND of resistance R7, one end of the collector contact resistance R6 of triode Q3, another termination power VCC of resistance R6, the collector of triode Q3 also connects one end of electric capacity C2, the other end ground connection GND of electric capacity C2, one end of electric capacity C2 connects one end of inductance L 1, the other end of inductance L 1 connects one end of electric capacity C3, the other end ground connection GND of electric capacity C3, one end of electric capacity C3 is also signal output part OUT.
2. the infrared communication circuit for ultrasonic flow meter according to claim 1, is characterized in that, described triode Q1 and triode Q3 is negative-positive-negative transistor, and triode Q2 is positive-negative-positive transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520030020.3U CN204330044U (en) | 2015-01-16 | 2015-01-16 | For the infrared communication circuit of ultrasonic flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520030020.3U CN204330044U (en) | 2015-01-16 | 2015-01-16 | For the infrared communication circuit of ultrasonic flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204330044U true CN204330044U (en) | 2015-05-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520030020.3U Expired - Fee Related CN204330044U (en) | 2015-01-16 | 2015-01-16 | For the infrared communication circuit of ultrasonic flow meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204330044U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109375687A (en) * | 2018-10-17 | 2019-02-22 | 西安微电子技术研究所 | A kind of bipolar temperature observation circuit of Flouride-resistani acid phesphatase |
-
2015
- 2015-01-16 CN CN201520030020.3U patent/CN204330044U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109375687A (en) * | 2018-10-17 | 2019-02-22 | 西安微电子技术研究所 | A kind of bipolar temperature observation circuit of Flouride-resistani acid phesphatase |
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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: 20150513 Termination date: 20160116 |
|
| EXPY | Termination of patent right or utility model |