CN110729811A - Main and standby power switching circuit of electronic gas meter - Google Patents
Main and standby power switching circuit of electronic gas meter Download PDFInfo
- Publication number
- CN110729811A CN110729811A CN201910988097.4A CN201910988097A CN110729811A CN 110729811 A CN110729811 A CN 110729811A CN 201910988097 A CN201910988097 A CN 201910988097A CN 110729811 A CN110729811 A CN 110729811A
- Authority
- CN
- China
- Prior art keywords
- capacitor
- diode
- power supply
- standby power
- main
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Volume Flow (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention provides a main and standby power switching circuit of an electronic gas meter. In the invention, the anode of the main power supply BT2 is connected with the anode of a second diode D1, and the cathode of a second diode D1 is connected with one end of a fifth capacitor C5, one end of a sixth capacitor C6 and the cathode of a first diode Q1; the negative electrode of the main power supply BT2, the other ends of the fifth capacitor C5 and the sixth capacitor C6 are grounded; the Vout end of the linear warm-pressing chip U1 is connected with one end of a third capacitor C3, one end of a fourth capacitor C4 and the anode of a first diode Q1, the Vin end of the linear warm-pressing chip U1 is connected with one end of a first capacitor C1, one end of a second capacitor C2 and the anode of a standby power supply BT1, and the GND end of the linear warm-pressing chip U1, the cathode of the standby power supply BT1, the other ends of the first capacitor C1, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 are grounded. The circuit can realize the switching to the standby battery without time delay when the main power is not charged, thereby realizing the characteristic of continuous measurement of the electronic gas meter and ensuring that the gas quantity is not lost.
Description
Technical Field
The invention belongs to the technical field of intelligent control of instruments, and particularly relates to a master-slave power switching circuit of an electronic gas meter.
Background
In an electronic gas meter, a gas meter is discontinuously waken up and processes a task program, but due to physical characteristics, the electronic gas meter cannot be like a leather diaphragm meter, and can still ensure the operation of the leather diaphragm even without a battery, so that a character wheel is driven to work, the condition that the gas consumption is lost cannot be generated, but the electronic gas meter needs electric energy to continuously drive a transducer to work, so that the reliable metering data cannot be lost, and the problem of working state caused by the adverse effects of CPU program runaway, dead halt and dead cycle can be solved.
The circuit is built by using a hardware circuit, which power supply is switched by hardware completely, and program control is not needed, so that adverse effects caused by running, dead halt and dead circulation of a CPU program are prevented. After the main and standby power switching circuit is adopted, the standby battery can be switched without delay when the main power is off, so that the continuous metering characteristic of the electronic gas meter is realized, and the gas quantity is ensured not to be lost.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a main and standby power switching circuit of an electronic gas meter.
A main and standby power switching circuit of an electronic gas meter comprises a standby power supply BT1, a main power supply BT2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a first diode Q1, a second diode D1 and a linear temperature and pressure chip U1.
The anode of the main power supply BT2 is connected with the anode of a second diode D1, the cathode of the main power supply BT2 is grounded, and the cathode of the second diode D1 is connected with one end of a fifth capacitor C5, one end of a sixth capacitor C6 and the cathode of a first diode Q1; the other end of the fifth capacitor C5 and the other end of the sixth capacitor C6 are grounded; the Vout end of the linear warm-pressing chip U1 is connected with one end of a third capacitor C3, one end of a fourth capacitor C4 and the anode of a first diode Q1, the Vin end of the linear warm-pressing chip U1 is connected with one end of a first capacitor C1, one end of a second capacitor C2 and the anode of a standby power supply BT1, and the GND end of the linear warm-pressing chip U1, the cathode of the standby power supply BT1, the other end of the first capacitor C1, the other end of the second capacitor C2, the other end of the third capacitor C3 and the other end of the fourth capacitor C4 are grounded.
The first diode Q1 is a double Schottky diode, and the specific model is Ansenet BAT54ALT 1G. The second diode D1 is a Schottky diode, and the specific model is ss 12.
The invention has the following beneficial effects:
the circuit is built by using a hardware circuit, which power supply is switched by hardware completely, and program control is not needed, so that adverse effects caused by running, dead halt and dead circulation of a CPU program are prevented. After the circuit is adopted, the main power can be switched to the standby battery without delay when the main power is not charged, so that the characteristic of continuously metering the electronic gas meter is realized, and the gas quantity is ensured not to be lost.
Drawings
FIG. 1 is a circuit diagram of the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and examples, without however being limited to the scope of the invention as described below.
The circuit shown in fig. 1 includes a standby power BT1, a main power BT2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a first diode Q1, a second diode D1, and a linear warm-pressing chip U1.
The anode of the main power supply BT2 is connected with the anode of a second diode D1, the cathode of the main power supply BT2 is grounded, and the cathode of the second diode D1 is connected with one end of a fifth capacitor C5, one end of a sixth capacitor C6 and the cathode of a first diode Q1; the other end of the fifth capacitor C5 and the other end of the sixth capacitor C6 are grounded; the Vout end of the linear warm-pressing chip U1 is connected with one end of a third capacitor C3, one end of a fourth capacitor C4 and the anode of a first diode Q1, the Vin end of the linear warm-pressing chip U1 is connected with one end of a first capacitor C1, one end of a second capacitor C2 and the anode of a standby power supply BT1, and the GND end of the linear warm-pressing chip U1, the cathode of the standby power supply BT1, the other end of the first capacitor C1, the other end of the second capacitor C2, the other end of the third capacitor C3 and the other end of the fourth capacitor C4 are grounded.
The first diode Q1 is a double schottky diode, specifically model number as amb 54ALT 1G. The second diode D1 is a schottky diode, and has a specific model number ss 12.
The working process of the invention is as follows:
the output voltage of the linear warm-pressing chip U1 is 3.3V, when the main power supply is connected, when the main power supply voltage is greater than 3.3V, the main power supply selection path formed by the first diode Q1 and the second diode D1 selects the main power supply to supply power, and when the main power supply voltage is lower than 3.3V, the main power supply selection path selects the standby power supply to supply power. The gas meter can perform all normal operations when the main power supply supplies power, the standby power supply does not support a switch valve which needs large current (100ma level) operation control, an IC card read-write card function, an RF wireless meter reading function and a data uploading function, and the gas meter can only perform a data storage function, an electronic metering function and a liquid crystal display function when the standby power supply supplies power, wherein the current consumption of the gas meter is less than 10 ma.
Power consumption analysis and notes:
the circuit has a linear warm-pressing chip U1, when the circuit selects a main power supply to supply power, the standby power supply still consumes a certain current value, the current value depends on the magnitude of the quiescent current of the linear warm-pressing chip U1, the current value can be less than 1ua at least, and because the voltage of the main power supply is 4.5V and more than 3.3V when the main power supply normally works, a proper first diode Q1 needs to be selected, the first diode Q1 in FIG. 1 is a double Schottky diode, the double Schottky diodes which have low reverse conduction current at high and low temperature environment temperature need to be selected, the specific model is AnsenMeiBAT 54ALT1G, and a general Schottky diode has larger reverse conduction current at high temperature, so that the standby power supply is reversely charged, and safety risk is brought.
Claims (2)
1. A main and standby power switching circuit of an electronic gas meter is characterized by comprising a standby power supply BT1, a main power supply BT2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a first diode Q1, a second diode D1 and a linear warm-pressing chip U1;
the anode of the main power supply BT2 is connected with the anode of a second diode D1, the cathode of the main power supply BT2 is grounded, and the cathode of the second diode D1 is connected with one end of a fifth capacitor C5, one end of a sixth capacitor C6 and the cathode of a first diode Q1; the other end of the fifth capacitor C5 and the other end of the sixth capacitor C6 are grounded; the Vout end of the linear warm-pressing chip U1 is connected with one end of a third capacitor C3, one end of a fourth capacitor C4 and the anode of a first diode Q1, the Vin end of the linear warm-pressing chip U1 is connected with one end of a first capacitor C1, one end of a second capacitor C2 and the anode of a standby power supply BT1, and the GND end of the linear warm-pressing chip U1, the cathode of the standby power supply BT1, the other end of the first capacitor C1, the other end of the second capacitor C2, the other end of the third capacitor C3 and the other end of the fourth capacitor C4 are grounded.
2. The main standby power switching circuit of an electronic gas meter according to claim 1, wherein the first diode Q1 is a double schottky diode, specifically, the model is amb 54ALT 1G; the second diode D1 is a Schottky diode, and the specific model is ss 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910988097.4A CN110729811A (en) | 2019-10-17 | 2019-10-17 | Main and standby power switching circuit of electronic gas meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910988097.4A CN110729811A (en) | 2019-10-17 | 2019-10-17 | Main and standby power switching circuit of electronic gas meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110729811A true CN110729811A (en) | 2020-01-24 |
Family
ID=69220251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910988097.4A Pending CN110729811A (en) | 2019-10-17 | 2019-10-17 | Main and standby power switching circuit of electronic gas meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110729811A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201937324U (en) * | 2010-12-16 | 2011-08-17 | 曹国权 | Power supply device with double power sources |
| CN204118850U (en) * | 2014-06-26 | 2015-01-21 | 成都千嘉科技有限公司 | A kind of flowmeter electric power system |
| CN106972616A (en) * | 2017-03-08 | 2017-07-21 | 深圳鼎智通讯股份有限公司 | The system and method that supplies power with double circuit of card swiping terminal supply pin in intelligent POS |
| EP3343723A1 (en) * | 2016-12-27 | 2018-07-04 | AMATECH - AMABUD Elektrotechnika Spólka z ograniczona odpowiedzialnoscia | Emergency light fitting for operation at low temperatures |
-
2019
- 2019-10-17 CN CN201910988097.4A patent/CN110729811A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201937324U (en) * | 2010-12-16 | 2011-08-17 | 曹国权 | Power supply device with double power sources |
| CN204118850U (en) * | 2014-06-26 | 2015-01-21 | 成都千嘉科技有限公司 | A kind of flowmeter electric power system |
| EP3343723A1 (en) * | 2016-12-27 | 2018-07-04 | AMATECH - AMABUD Elektrotechnika Spólka z ograniczona odpowiedzialnoscia | Emergency light fitting for operation at low temperatures |
| CN106972616A (en) * | 2017-03-08 | 2017-07-21 | 深圳鼎智通讯股份有限公司 | The system and method that supplies power with double circuit of card swiping terminal supply pin in intelligent POS |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mayer et al. | Smart power unit—mW-to-nW power management and control for self-sustainable IoT devices | |
| CN102147652A (en) | Shut-down energy-saving system and shut-down energy-saving method | |
| CN203643779U (en) | Outage wake-up circuit of ammeter metering terminal | |
| CN110729811A (en) | Main and standby power switching circuit of electronic gas meter | |
| CN201503569U (en) | South bridge chip power supply circuit | |
| CN102420899B (en) | Device and method for automatically switching working state of Bluetooth terminal equipment according to working state of mainframe | |
| CN212992031U (en) | Linear power supply power-off detection circuit | |
| CN203747473U (en) | Dedicated chip integrating linear charging and constant-voltage output | |
| CN203278240U (en) | Reactive compensation controller of power supply resetting detection technology | |
| CN203376686U (en) | Voltage detection and data selection circuit for data memory protection | |
| CN206148142U (en) | Ferroelectric RAM's power timing sequence control circuit | |
| US8659442B2 (en) | Power-saving reminder circuit for computer | |
| CN211236738U (en) | Power-on tracking circuit | |
| CN103513744A (en) | Energy-saving circuit | |
| CN220342303U (en) | External signal triggering power-on self-starting circuit | |
| CN204947678U (en) | A kind of hand-held set electric power management circuit | |
| CN202133702U (en) | Low power consumption signal driving AC-DC digital ammeter | |
| CN109582118A (en) | A kind of method and terminal reducing wearable device power consumption | |
| CN103487638B (en) | A kind of accumulator low voltage test alarm method | |
| CN202334614U (en) | Device capable of automatically switching working state of Bluetooth terminal equipment according to host working state | |
| CN213182471U (en) | Low-power consumption RTC timing starting circuit | |
| CN102279306A (en) | Signal-driving alternated current/direct current digital ampere meter with low power consumption | |
| CN213959969U (en) | Quick start circuit with farad capacitor | |
| CN213024098U (en) | Heating control circuit of loongson 3A3000 reinforcement type notebook computer | |
| CN220437553U (en) | Intelligent household electronic scale based on Internet of things technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200124 |