CN205212813U - A pulse output circuit for electric -magnetic flow meter - Google Patents
A pulse output circuit for electric -magnetic flow meter Download PDFInfo
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- CN205212813U CN205212813U CN201520964667.3U CN201520964667U CN205212813U CN 205212813 U CN205212813 U CN 205212813U CN 201520964667 U CN201520964667 U CN 201520964667U CN 205212813 U CN205212813 U CN 205212813U
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- output
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- type triode
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- pulse
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Abstract
The utility model relates to a pulse output circuit for electric -magnetic flow meter, including first opto -coupler U1, second opto -coupler U2, electric capacity C1, resistance R1 and resistance R2, first opto -coupler U1 includes diode D1 and NPN type triode Q1, and second opto -coupler U2 includes diode D2 and NPN type triode Q2, electric capacity C1's the first pulse of one end input, electric capacity C1's the other end is connected with diode D1's negative pole and diode D2's positive pole respectively, diode D1's positive pole is connected with resistance R1's one end, resistance R1's other end ground connection, mains voltage is connected to NPN type triode Q1's collecting electrode, NPN type triode Q1's projecting pole is connected with the output, diode D2's negative pole is connected with resistance R2's one end, resistance R2's other end ground connection, NPN type triode Q2's collecting electrode with the output is connected, NPN type triode Q2's emitter ground. The utility model discloses can provide great output current when the output output high level to improve the driving force.
Description
Technical field
The utility model relates to measuring instrument field, particularly relates to a kind of impulse output circuit for electromagnetic flowmeter.
Background technology
Impulse output circuit is realized by the open circuit of the collector electrode of NPN type triode, and when exporting high level, driving force is more weak.Fig. 1 is the impulse output circuit figure of prior art, and as shown in Figure 1, when driving pulse VIN is high level, NPN type triode Q1 is saturated, and output pulse is low level; When driving pulse VIN is low level, NPN type triode Q1 ends, and output pulse is high level, can complete pulse output function.In order to make NPN type triode Q1 conducting and output low level, the resistance of resistance R2 should comparatively large (being generally 10K), and when output exports high level, resistance R2 can only pass through less electric current, and therefore driving force is more weak.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of impulse output circuit for electromagnetic flowmeter, can provide larger output current, and improve driving force when output exports high level.
The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of impulse output circuit for electromagnetic flowmeter, comprise the first optocoupler U1, the second optocoupler U2, electric capacity C1, resistance R1 and resistance R2, described first optocoupler U1 comprises diode D1 and NPN type triode Q1, and described second optocoupler U2 comprises diode D2 and NPN type triode Q2;
One end of described electric capacity C1 inputs the first pulse, the other end of described electric capacity C1 is connected with the anode of diode D2 with the negative electrode of diode D1 respectively, the anode of described diode D1 is connected with one end of resistance R1, the other end ground connection of described resistance R1, the collector electrode of NPN type triode Q1 connects supply voltage, the emitter of NPN type triode Q1 is connected with output, the negative electrode of diode D2 is connected with one end of resistance R2, the other end ground connection of resistance R2, the collector electrode of NPN type triode Q2 is connected with described output, the grounded emitter of NPN type triode Q2.
The beneficial effects of the utility model are: when the saturation conduction resistance of the NPN type triode Q1 of the first optocoupler U1 is very little, and output exports high level, thus provides larger output current, improve driving force.
On the basis of technique scheme, the utility model can also do following improvement.
Further, when described first pulse is high level, described electric capacity C1 is in charged state, described diode D2 and described NPN type triode Q2 conducting, described NPN type triode Q1 is cut-off state, and described output exports the second pulse, and described second pulse is low level.
Further, when described first pulse is described low level, described electric capacity C1 is in discharge condition, described diode D1 and described NPN type triode Q1 conducting, described NPN type triode Q2 is cut-off state, and described output exports described second pulse, and described second pulse is described high level.
Further, the voltage of described high level is 3V, and described low level voltage is 0V.
Further, the input of described output NAND gate U3 is connected.
Further, when described output is high level, the output output low level of described not gate U3; When described output is described low level, the output of described not gate U3 exports described high level.
Further, when described first pulse is described high level, the output of described not gate U3 exports described high level; When described first pulse is described low level, the output of described not gate U3 exports described low level.
Accompanying drawing explanation
Fig. 1 is the impulse output circuit figure of prior art;
A kind of impulse output circuit figure for electromagnetic flowmeter that Fig. 2 provides for the utility model embodiment.
Embodiment
Be described principle of the present utility model and feature below in conjunction with accompanying drawing, example, only for explaining the utility model, is not intended to limit scope of the present utility model.
A kind of impulse output circuit figure for electromagnetic flowmeter that Fig. 2 provides for the utility model embodiment.
As shown in Figure 2, impulse output circuit comprises the first optocoupler U1, the second optocoupler U2, electric capacity C1, resistance R1 and resistance R2, and described first optocoupler U1 comprises diode D1 and NPN type triode Q1, and described second optocoupler U2 comprises diode D2 and NPN type triode Q2.
One end of described electric capacity C1 inputs the first pulse, the other end of described electric capacity C1 is connected with the anode of diode D2 with the negative electrode of diode D1 respectively, the anode of described diode D1 is connected with one end of resistance R1, the other end ground connection of described resistance R1, the collector electrode of NPN type triode Q1 connects supply voltage, the emitter of NPN type triode Q1 is connected with output, the negative electrode of diode D2 is connected with one end of resistance R2, the other end ground connection of resistance R2, the collector electrode of NPN type triode Q2 is connected with described output, the grounded emitter of NPN type triode Q2.
Further, when described first pulse is high level, described electric capacity C1 is in charged state, described diode D2 and described NPN type triode Q2 conducting, described NPN type triode Q1 is cut-off state, and described output exports the second pulse, and described second pulse is low level.
Here, when the first pulse is high level (voltage is 3V), start to charge to electric capacity C1, along with constantly carrying out of charging, the current potential of C1 "+pole " is more and more higher, and the current potential of "-pole " is more and more lower, between "+pole " and "-pole ", potential difference is increasing, until at the end of charging, C1 "+pole " current potential is 3V, "-pole " current potential be 0V, potential difference equals 3V.In the charging process of electric capacity C1, charging current circulation path is C1-D2-R2.
Further, when described first pulse is described low level, described electric capacity C1 is in discharge condition, described diode D1 and described NPN type triode Q1 conducting, described NPN type triode Q2 is cut-off state, and described output exports described second pulse, and described second pulse is described high level.
Further, the voltage of described high level is 3V, and described low level voltage is 0V.
Here, when the first pulses switch is low level (voltage equals 0V), the current potential on electric capacity C1 "+pole " changes into 0, and the current potential on "-pole " then changes into-3V, now electric capacity just starts electric discharge, and the circulation path of its discharging current is R1-D1-C1.
Further, the input of described output NAND gate U3 is connected.
Further, when described output is high level, the output output low level of described not gate U3; When described output is described low level, the output of described not gate U3 exports described high level.
Further, when described first pulse is described high level, the output of described not gate U3 exports described high level; When described first pulse is described low level, the output of described not gate U3 exports described low level.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (7)
1. the impulse output circuit for electromagnetic flowmeter, it is characterized in that, comprise the first optocoupler U1, the second optocoupler U2, electric capacity C1, resistance R1 and resistance R2, described first optocoupler U1 comprises diode D1 and NPN type triode Q1, and described second optocoupler U2 comprises diode D2 and NPN type triode Q2;
One end of described electric capacity C1 inputs the first pulse, the other end of described electric capacity C1 is connected with the anode of diode D2 with the negative electrode of diode D1 respectively, the anode of described diode D1 is connected with one end of resistance R1, the other end ground connection of described resistance R1, the collector electrode of NPN type triode Q1 connects supply voltage, the emitter of NPN type triode Q1 is connected with output, the negative electrode of diode D2 is connected with one end of resistance R2, the other end ground connection of resistance R2, the collector electrode of NPN type triode Q2 is connected with described output, the grounded emitter of NPN type triode Q2.
2. a kind of impulse output circuit for electromagnetic flowmeter according to claim 1, it is characterized in that, when described first pulse is high level, described electric capacity C1 is in charged state, described diode D2 and described NPN type triode Q2 conducting, described NPN type triode Q1 is cut-off state, and described output exports the second pulse, and described second pulse is low level.
3. a kind of impulse output circuit for electromagnetic flowmeter according to claim 2, it is characterized in that, when described first pulse is described low level, described electric capacity C1 is in discharge condition, described diode D1 and described NPN type triode Q1 conducting, described NPN type triode Q2 is cut-off state, and described output exports described second pulse, and described second pulse is described high level.
4. a kind of impulse output circuit for electromagnetic flowmeter according to Claims 2 or 3, is characterized in that, the voltage of described high level is 3V, and described low level voltage is 0V.
5. a kind of impulse output circuit for electromagnetic flowmeter according to claim 1, is characterized in that, the input of described output NAND gate U3 is connected.
6. a kind of impulse output circuit for electromagnetic flowmeter according to claim 5, is characterized in that, when described output is high level, and the output output low level of described not gate U3; When described output is described low level, the output of described not gate U3 exports described high level.
7. a kind of impulse output circuit for electromagnetic flowmeter according to claim 6, is characterized in that, when described first pulse is described high level, the output of described not gate U3 exports described high level; When described first pulse is described low level, the output of described not gate U3 exports described low level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520964667.3U CN205212813U (en) | 2015-11-27 | 2015-11-27 | A pulse output circuit for electric -magnetic flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520964667.3U CN205212813U (en) | 2015-11-27 | 2015-11-27 | A pulse output circuit for electric -magnetic flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205212813U true CN205212813U (en) | 2016-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520964667.3U Withdrawn - After Issue CN205212813U (en) | 2015-11-27 | 2015-11-27 | A pulse output circuit for electric -magnetic flow meter |
Country Status (1)
| Country | Link |
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| CN (1) | CN205212813U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356872A (en) * | 2015-11-27 | 2016-02-24 | 重庆川仪自动化股份有限公司 | Pulse output circuit and pulse output method for electromagnetic flowmeter |
| US10712184B1 (en) | 2019-01-09 | 2020-07-14 | Georg Fischer Signet Llc | Magnetic flowmeter assembly having independent coil drive and control system |
| US11365995B2 (en) | 2018-09-28 | 2022-06-21 | Georg Fischer Signet Llc | Magnetic flowmeter including auxiliary electrodes upstream and downstream of the pair of measuring electrodes and an adjustable brace |
-
2015
- 2015-11-27 CN CN201520964667.3U patent/CN205212813U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356872A (en) * | 2015-11-27 | 2016-02-24 | 重庆川仪自动化股份有限公司 | Pulse output circuit and pulse output method for electromagnetic flowmeter |
| CN105356872B (en) * | 2015-11-27 | 2018-08-03 | 重庆川仪自动化股份有限公司 | A kind of impulse output circuit and pulse output method for electromagnetic flowmeter |
| US11365995B2 (en) | 2018-09-28 | 2022-06-21 | Georg Fischer Signet Llc | Magnetic flowmeter including auxiliary electrodes upstream and downstream of the pair of measuring electrodes and an adjustable brace |
| US10712184B1 (en) | 2019-01-09 | 2020-07-14 | Georg Fischer Signet Llc | Magnetic flowmeter assembly having independent coil drive and control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160504 Effective date of abandoning: 20180803 |
|
| AV01 | Patent right actively abandoned |