CN202109950U - Pulse sampling trip protection circuit - Google Patents
Pulse sampling trip protection circuit Download PDFInfo
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- CN202109950U CN202109950U CN2011202044326U CN201120204432U CN202109950U CN 202109950 U CN202109950 U CN 202109950U CN 2011202044326 U CN2011202044326 U CN 2011202044326U CN 201120204432 U CN201120204432 U CN 201120204432U CN 202109950 U CN202109950 U CN 202109950U
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- resistance
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- triode
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- protection circuit
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Abstract
A pulse sampling trip protection circuit comprises a sensor, an electronic sampling circuit and a break-proof circuit. The sensor comprises a switching device S1 and a resistor R2; the electronic sampling circuit comprises a resistor R3, a resistor R7 and a capacitor C1; the break-proof circuit comprises a resistor R1, a resistor R6, a resistor R4, a resistor R5 and a triode Q1; a pulse output end is used for sampling pulse; midpoints of the switching device S1 and the resistor R2 are connected with the resistor R1 and the resistor R3; the other end of the resistor R1 is connected with the resistor R6 and the resistor R4; one end of the resistor R4 is connected with a base electrode of the triode Q1; a collector electrode of the triode Q1 is connected with the resistor R5; and the other end of the resistor R3 is connected with the resistor R7, the capacitor C1 and the pulse output end. By the aid of the pulse sampling trip protection circuit, products such as a gas meter, a flowmeter, a water meter and the like are more reliable, and the pulse sampling trip protection circuit is an effective measure for preventing stealing gas and water by damaging a sampling circuit. The pulse sampling trip protection circuit mainly has the advantages of reliability, low cost and energy conservation.
Description
Technical field
The utility model relates to a kind of holding circuit, refers in particular to a kind of impulse sampling breaking protection circuit that is applicable to metering outfits such as gas meter, flow meter, flowmeter, water meter.
Background technology
Metering outfit major parts such as existing gas meter, flow meter, flowmeter, water meter have adopted the technical scheme of impulse sampling, in actual life, occur destroying sample circuit, thereby reach purposes such as stealing the tolerance and the water yield.Chinese patent once disclosed a kind of " gas meter, flow meter complete machine power down protection circuit " (China; Notification number CN200976484Y; November 14 2007 day for announcing); Single-chip microprocessor MCU and capacitor C 1 are connected in the two ends of battery in parallel, on the positive pole of capacitor C 1, are connected with out valve member, between the positive pole of single-chip microprocessor MCU and capacitor C 1, are serially connected with unilateral diode V1.But it can not be as the impulse sampling breaking protection circuit.Chinese patent once disclosed a kind of " real-time guard circuit " (China; Notification number CN201628560U; November 10 2010 day for announcing), it is characterized in that: the detection signal of single-chip microcomputer receiving test circuit output, single-chip microcomputer output signal is through the control circuit by-pass valve control; Single-chip microcomputer reads clock and recording clock from real-time clock, single-chip microcomputer and data-carrier store interaction data signal.When gas meter, flow meter generation abnormal conditions, single-chip microcomputer in time carries out accurate record, and the by-pass valve control action, like this, in time accurate record is arranged all when having guaranteed gas meter, flow meter generation abnormal conditions, makes gas meter, flow meter have accurate safeguard function.But it can not be as the impulse sampling breaking protection circuit.
The utility model content
The purpose of the utility model is to provide a kind of impulse sampling breaking protection circuit that is applicable to metering outfits such as gas meter, flow meter, flowmeter, water meter.
For achieving the above object; The solution that the utility model is taked is: a kind of impulse sampling breaking protection circuit; It is made up of sensor, electronics sample circuit, anti-power failure road, and sensor is made up of switching device S1, resistance R 2, and the electronics sample circuit is made up of resistance R 3, resistance R 7, capacitor C 1; Anti-power failure routing resistance R1, resistance R 6, resistance R 4, resistance R 5, triode Q1 form, and the Pulse output terminal is an impulse sampling; Switching device S1 and resistance R 2 mid point connecting resistance R1 and resistance R 3, resistance R 1 other end connecting resistance R6 and resistance R 4, resistance R 4 one termination triode Q1 base stages, triode Q1 collector connecting resistance R5, resistance R 3 other end connecting resistance R7, capacitor C 1, Pulse output terminal.
The utility model belongs to impulse sampling and prevents that the signal input part circuit is disconnected circuit design.Using this circuit, make products such as gas meter, flow meter, flowmeter, water meter more reliable, is to prevent to steal the effective measures of the tolerance and the water yield through destroying sample circuit.Its principal feature is: reliable, low-cost, energy-conservation.
Description of drawings
Fig. 1 is the electrical connection diagram of present embodiment.
Among the figure: 1, sensor, 2, the electronics sample circuit, 3, the anti-power failure road, 4, level shifting circuit.
Embodiment
Below in conjunction with embodiment and accompanying drawing thereof the utility model is remake description.
Referring to Fig. 1; A kind of impulse sampling breaking protection circuit; It is made up of sensor 1, electronics sample circuit 2, anti-power failure road 3, and sensor 1 is made up of switching device S1, resistance R 2, and electronics sample circuit 2 is made up of resistance R 3, resistance R 7, capacitor C 1; Anti-power failure road 3 is made up of resistance R 1, resistance R 6, resistance R 4, resistance R 5, triode Q1, and the Pulse output terminal is an impulse sampling; Switching device S1 and resistance R 2 mid point connecting resistance R1 and resistance R 3, resistance R 1 other end connecting resistance R6 and resistance R 4, resistance R 4 one termination triode Q1 base stages, triode Q1 collector connecting resistance R5, resistance R 3 other end connecting resistance R7, capacitor C 1, Pulse output terminal.
Referring to Fig. 1; Described resistance R 5 other end connecting resistance R8, resistance R 8 another termination triode Q2 base stages, triode Q2 collector connecting resistance R9, CutDwonFlag output terminal; The CutDwonFlag output terminal is that short circuit triggers, and resistance R 8, resistance R 9, triode Q2 form level shifting circuit 4.
Referring to Fig. 1, the principle of work of this circuit is following: when switching device S1 disconnection, circuit is in static state; Because resistance R 2, resistance R 1, resistance R 6, resistance R 4 conductings; Resistance R 4 voltages make triode Q1 be in the saturation conduction state greater than 0.5V, and c place voltage is low level; Triode Q2 breaks off for ending, CutDownFlag output end voltage output high level.When switching device S1 adhesive, the level of Pulse output terminal so just can carry out impulse sampling and calculate for becoming height from low.The level of other circuit is constant.When a or the disconnection of b place, owing to there is not the support of voltage, the Pulse output terminal is a low level; Triode Q1 is by breaking off; The c place is a high level, and triode Q2 is in saturation conduction, and CutDownFlag output terminal level is low from hypermutation; Negative edge has triggered the single-chip microcomputer in the products such as gas meter, flow meter, flowmeter, water meter, thereby has reached the testing goal that circuit breaks off.If system requirements CutDownFlag output terminal level is during from low to high as trigger condition, as long as it is just passable to omit level shifting circuit 4.
Claims (2)
1. impulse sampling breaking protection circuit; It is characterized in that: it is made up of sensor (1), electronics sample circuit (2), anti-power failure road (3); Sensor (1) is made up of switching device S1, resistance R 2; Electronics sample circuit (2) is made up of resistance R 3, resistance R 7, capacitor C 1, and anti-power failure road (3) are made up of resistance R 1, resistance R 6, resistance R 4, resistance R 5, triode Q1, and the Pulse output terminal is an impulse sampling; Switching device S1 and resistance R 2 mid point connecting resistance R1 and resistance R 3, resistance R 1 other end connecting resistance R6 and resistance R 4, resistance R 4 one termination triode Q1 base stages, triode Q1 collector connecting resistance R5, resistance R 3 other end connecting resistance R7, capacitor C 1, Pulse output terminal.
2. impulse sampling breaking protection circuit according to claim 1; It is characterized in that: described resistance R 5 other end connecting resistance R8; Resistance R 8 another termination triode Q2 base stages; Triode Q2 collector connecting resistance R9, CutDwonFlag output terminal, CutDwonFlag output terminal are that short circuit triggers, and resistance R 8, resistance R 9, triode Q2 form level shifting circuit (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202044326U CN202109950U (en) | 2011-06-13 | 2011-06-13 | Pulse sampling trip protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202044326U CN202109950U (en) | 2011-06-13 | 2011-06-13 | Pulse sampling trip protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202109950U true CN202109950U (en) | 2012-01-11 |
Family
ID=45435392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202044326U Expired - Lifetime CN202109950U (en) | 2011-06-13 | 2011-06-13 | Pulse sampling trip protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202109950U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110850201A (en) * | 2019-10-31 | 2020-02-28 | 苏州浪潮智能科技有限公司 | High-frequency narrow pulse detection locking circuit and method |
-
2011
- 2011-06-13 CN CN2011202044326U patent/CN202109950U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110850201A (en) * | 2019-10-31 | 2020-02-28 | 苏州浪潮智能科技有限公司 | High-frequency narrow pulse detection locking circuit and method |
| CN110850201B (en) * | 2019-10-31 | 2021-09-03 | 苏州浪潮智能科技有限公司 | High-frequency narrow pulse detection locking circuit and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GOLDCARD HIGH TECHNOLOGY CO., LTD. Free format text: FORMER NAME: ZHEJIANG GOLDCARD HI-TECH CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 325600 Yueqing Economic Development Zone, Zhejiang, No. seventeen, No. 261 Patentee after: GoldCard High Technology Co., Ltd. Address before: 325600, No. six, No. 151, Yueqing Economic Development Zone, Zhejiang, China Patentee before: Zhejiang Goldcard High-tech Co., Ltd. |
|
| CP03 | Change of name, title or address |
Address after: 325600 Yueqing Economic Development Zone, Wenzhou, No. seventeen weft Road No. 291, Zhejiang Patentee after: Limited by Share Ltd group Address before: 325600 Yueqing Economic Development Zone, Zhejiang, No. seventeen, No. 261 Patentee before: GoldCard High Technology Co., Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120111 |
|
| CX01 | Expiry of patent term |