CN207440265U - A kind of gas meter, flow meter metering system power sense circuit - Google Patents
A kind of gas meter, flow meter metering system power sense circuit Download PDFInfo
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- CN207440265U CN207440265U CN201721470828.9U CN201721470828U CN207440265U CN 207440265 U CN207440265 U CN 207440265U CN 201721470828 U CN201721470828 U CN 201721470828U CN 207440265 U CN207440265 U CN 207440265U
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Abstract
A kind of gas meter, flow meter metering system power sense circuit is claimed in the utility model, and the metering system power supply is powered by control circuit U4 control three stage power sources, further included：Dual power supply generation circuit, discharge circuit and detection circuit, dual power supply generation circuit are connected respectively with control circuit U4, and the dual power supply generation circuit is connected with detection circuit, and the detection circuit is connected with discharge circuit；The residual voltage of accessory power supply 3.3V is quickly pulled down to zero volt by main power source VBAT and stand-by power supply VL1, the discharge circuit needed for the dual power supply generation circuit generation metering system in detection process.The present apparatus realizes that gas meter, flow meter metering system dual power supply detects automatically, and falling process improves mass gas meter, flow meter metering system power detecting efficiency according to setting sequential automatic imitation.
Description
Technical field
The utility model belongs to gas meter, flow meter metering field, particularly belongs to a kind of gas meter, flow meter metering system power sense circuit.
Background technology
In existing gas meter, flow meter metering system detection field, system power supply detection has important role, gas meter, flow meter metering
System is generally using dual power supply, safe and reliable performance and the stability that decide system of electric power system.Gas meter, flow meter measures
The detection of system be related to dual power supply give, the control of discharge of sequential and accessory power supply, existing gas meter, flow meter metering system power supply inspection
It surveys and is mostly carried out with manual control power supply side work, timing control precision is relatively low, causes to detect power detecting holding time mistake in process
Long, complete machine detection efficiency is low.
Utility model content
The utility model aims to solve the problem that more than problem of the prior art.Propose a kind of raising mass gas meter, flow meter metering system
The gas meter, flow meter metering system power sense circuit for power detecting efficiency of uniting.The technical solution of the utility model is as follows：
A kind of gas meter, flow meter metering system power sense circuit, the metering system power supply is by control circuit U4 control three-level electricity
Source powers, and further includes：Dual power supply generation circuit, discharge circuit and detection circuit, dual power supply generation circuit are electric with control respectively
Road U4 connections, the dual power supply generation circuit are connected with detection circuit, and the detection circuit is connected with discharge circuit；Double electricity
Source generating circuit generates the main power source VBAT and stand-by power supply VL1 needed for metering system, and the discharge circuit is in detection process
The residual voltage of accessory power supply 3.3V is quickly pulled down to zero volt.
Further, the metering system power supply is powered using three stage power source, and VBT is primary power cource, using four section 1.5V
Zinc-manganse dioxide dry cell is used in series, and VL1 is stand-by power supply, is to be when main battery electricity exhausts using monomer lithium ion battery
System provides alarm, and C9 is emergency power supply, using super capacitor, is charged when standby usage power supply is normal to it, active and standby electricity consumption
When source is all failed, super capacitor provides system the key equipment shutdown operation including emergency service ensures electrical valve, system
Working power VDD powers for 3.3V, and cell voltage is carried out to working power by low voltage difference micro energy lose molded line type power supply MD5333
Voltage transformation.
Further, the dual power supply generation circuit includes the first power generation circuit and second source generation circuit, institute
It states the first power generation circuit and second source generation circuit is just the same, first power generation circuit includes one linearly
Power supply U5, resistance R28, resistance R33 and resistance R34, triode V8, triode V10, variable resistor VR1, VR3, the linear electricity
Source U5 is connected by VCU ports with resistance R28, and resistance R28 is connected by variable resistor VR1 with the collector of V10, V10's
Base stage is connected with resistance R34, and emitter ground connection, linear power supply U5 is connected by ADJ ports with variable resistor VR3, variable
Resistance VR1 is connected with the collector of V8, and the base stage of V8 is connected with resistance R33, emitter ground connection.
Further, the model MIC29302T, P1EN and P2EN of the linear power supply U5 is making for two linear power supplies
It can port.
Further, the model DSPIC30F3014 of the control circuit U4.
It the advantages of the utility model and has the beneficial effect that：
The utility model realizes that gas meter, flow meter metering system power detecting automatic switch control, output voltage accurately give, and
According to setting sequential automatic imitation detection main power source and backup power supply falling process, mass gas meter, flow meter metering system power supply is improved
Accuracy in detection and efficiency.
Description of the drawings
Fig. 1 is that the utility model offer preferred embodiment is tested power supply schematic diagram figure；
Fig. 2 represents metering system power sense circuit schematic diagram；
Fig. 3 represents dual power supply generation circuit schematic diagram；
Fig. 4 represents discharge loop schematic diagram；
Fig. 5 represents detection circuit schematic diagram；
Fig. 6 represents detection sequence diagram.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It is clear, describe in detail.Described embodiment is only the part of the embodiment of the utility model.
The utility model solve above-mentioned technical problem technical solution be：
Fig. 1-5 is a kind of gas meter, flow meter metering system power sense circuit, and the metering system power supply is controlled by control circuit U4
Three stage power source power supply processed, further includes：Dual power supply generation circuit, discharge circuit and detection circuit, dual power supply generation circuit difference
It is connected with control circuit U4, the dual power supply generation circuit is connected with detection circuit, and the detection circuit is connected with discharge circuit；
Main power source VBAT and stand-by power supply VL1, the discharge circuit needed for the dual power supply generation circuit generation metering system are being examined
The residual voltage of accessory power supply 3.3V is quickly pulled down to zero volt during surveying.In the utility model, on microcontrollers such as U4
The relevant treatment program of processing is not the emphasis to be protected of the utility model place, is that those skilled in the art need not pay
Creative work connection relation before what the utility model to be protected is its modules and its is used with regard to obtainable
Specific component achievees the purpose that low-power consumption is measured.
Preferably, the metering system power supply is powered using three stage power source, and VBT is primary power cource, using four section 1.5V zinc
Manganese dry cell is used in series, and VL1 is stand-by power supply, is system when main battery electricity exhausts using monomer lithium ion battery
Alarm is provided, C9 is emergency power supply, using super capacitor, is charged when standby usage power supply is normal to it, standby usage power supply
When all failing, super capacitor provides system the key equipment shutdown operation including emergency service ensures electrical valve, system work
Make power vd D to power for 3.3V, cell voltage is carried out to the electricity of working power by low voltage difference micro energy lose molded line type power supply MD5333
Buckling is changed.
Preferably, the dual power supply generation circuit includes the first power generation circuit and second source generation circuit, described
First power generation circuit and second source generation circuit are just the same, and first power generation circuit includes a linear electricity
Source U5, resistance R28, resistance R33 and resistance R34, triode V8, triode V10, variable resistor VR1, VR3, the linear power supply
U5 is connected by VCU ports with resistance R28, and resistance R28 is connected by variable resistor VR1 with the collector of V10, the base of V10
Pole is connected with resistance R34, and emitter ground connection, linear power supply U5 is connected by ADJ ports with variable resistor VR3, can power transformation
Resistance VR1 is connected with the collector of V8, and the base stage of V8 is connected with resistance R33, emitter ground connection.
Preferably, the model MIC29302T, P1EN and P2EN of the linear power supply U5 is the enabled of two linear power supplies
Port.
Preferably, the model DSPIC30F3014 of the control circuit U4.
Fig. 1 show gas meter, flow meter metering system power supply composition
To ensure metering control system power supply high reliability, powered using three stage power source, VBT is primary power cource, is adopted
It is used in series with four section 1.5V zinc-manganse dioxide dry cells, VL1 is stand-by power supply, using monomer lithium ion battery, in main battery electricity
Alarm is provided for system when exhausting, C9 is emergency power supply, and using super capacitor, it is filled when standby usage power supply is normal
Electricity, when standby usage power supply all fails, super capacitor provides system emergency service and ensures that the key equipments such as electrical valve shut down behaviour
Make.System working power VDD powers for 3.3V, and cell voltage is carried out to work by low voltage difference micro energy lose molded line type power supply MD5333
The voltage transformation of power supply.2nd, metering system power sense circuit
Metering system power sense circuit is divided into dual power supply generation circuit, discharge circuit and detection circuit.
1st, dual power supply generation circuit
Dual power supply generation circuit effect be generate metering system needed for main power source VBAT and spare VL1, U5, U6 be two
Linear power supply model MIC29302T, P1EN and P2EN are the enable port of two linear power supplies, KP1, KP2, KP3, KP4 pairs
Different output voltages is answered to select.VR1, VR2, VR1, VR2 control output voltage values for adjusting with the resistance ratio of R28, R29.
2nd, discharge loop
Discharge loop is used to that the residual voltage of accessory power supply 3.3V quickly to be pulled down to zero volt, FD ports in detection process
It is controlled by microcontroller, R31 and R30 are discharge load resistance, and Q1 is discharge switch SS8050, and when FD ports put high, V3V passes through
R31 and R30 flows out electric current.
3rd, detection circuit
Detection circuit judges its state, for sampling accessory power supply voltage value as whether accessory power supply discharges into
Position or whether normally power on.Detection circuit is to filter accessory power supply V3V by RC (R27, C13, C14), into microcontroller
Analog-to-digital conversion is carried out in the RB9 of A/D ports.
3rd, detection process current control sequential
Detection process power supply sequential is as shown in Figure 6.Two-way adjustable voltage VBAT and VLI are exported, simulates 4 section AAA types all the way
Battery, simulates lithium battery all the way, and simulation schematic diagram is as shown below.Voltages of the wherein ULI and UBAT in different conditions is to need
It to be set, i.e., can adjust according to actual conditions.
The above embodiment is interpreted as being merely to illustrate the utility model rather than limits the guarantor of the utility model
Protect scope.After the content of record of the utility model has been read, technical staff can make the utility model various changes
Or modification, these equivalence changes and modification equally fall into the utility model claims limited range.
Claims (5)
1. a kind of gas meter, flow meter metering system power sense circuit, the metering system power supply controls three stage power source by control circuit U4
Power supply, which is characterized in that further include：Dual power supply generation circuit, discharge circuit and detection circuit, dual power supply generation circuit respectively with
Control circuit U4 connections, the dual power supply generation circuit are connected with detection circuit, and the detection circuit is connected with discharge circuit；Institute
It states the main power source VBAT needed for dual power supply generation circuit generation metering system and stand-by power supply VL1, the discharge circuit is detecting
The residual voltage of accessory power supply 3.3V is quickly pulled down to zero volt in the process.
2. gas meter, flow meter metering system power sense circuit according to claim 1, which is characterized in that the metering system electricity
Source is powered using three stage power source, and VBT is primary power cource, is used in series using four section 1.5V zinc-manganse dioxide dry cells, VL1 is standby electricity
Using monomer lithium ion battery, alarm is provided when main battery electricity exhausts for system for source, and C9 is emergency power supply, using super
Grade capacitance, charges to it when standby usage power supply is normal, and when standby usage power supply all fails, super capacitor provides system should
Anxious power supply ensures the key equipment shutdown operation including electrical valve, and system working power VDD powers for 3.3V, micro- by low voltage difference
Power consumption molded line type power supply MD5333 carries out cell voltage to the voltage transformation of working power.
3. gas meter, flow meter metering system power sense circuit according to claim 1, which is characterized in that the dual power supply generates
Circuit includes the first power generation circuit and second source generation circuit, and first power generation circuit and second source generate
Circuit is just the same, first power generation circuit include a linear power supply U5, resistance R28, resistance R33 and resistance R34,
Triode V8, triode V10, variable resistor VR1, VR3, the linear power supply U5 is connected by VCU ports with resistance R28, electric
Resistance R28 is connected by variable resistor VR1 with the collector of V10, and the base stage of V10 is connected with resistance R34, emitter ground connection,
Linear power supply U5 is connected by ADJ ports with variable resistor VR3, and variable resistor VR1 is connected with the collector of V8, the base of V8
Pole is connected with resistance R33, emitter ground connection.
4. gas meter, flow meter metering system power sense circuit according to claim 3, which is characterized in that the linear power supply U5
Model MIC29302T, P1EN and P2EN be two linear power supplies enable port.
5. the gas meter, flow meter metering system power sense circuit according to one of claim 1-4, which is characterized in that the control
The model DSPIC30F3014 of circuit U 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721470828.9U CN207440265U (en) | 2017-11-07 | 2017-11-07 | A kind of gas meter, flow meter metering system power sense circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721470828.9U CN207440265U (en) | 2017-11-07 | 2017-11-07 | A kind of gas meter, flow meter metering system power sense circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207440265U true CN207440265U (en) | 2018-06-01 |
Family
ID=62292180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721470828.9U Active CN207440265U (en) | 2017-11-07 | 2017-11-07 | A kind of gas meter, flow meter metering system power sense circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207440265U (en) |
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2017
- 2017-11-07 CN CN201721470828.9U patent/CN207440265U/en active Active
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