CN218243094U - Dual-power compatible power supply circuit suitable for intelligent remote transmission electromagnetic water meter - Google Patents
Dual-power compatible power supply circuit suitable for intelligent remote transmission electromagnetic water meter Download PDFInfo
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- CN218243094U CN218243094U CN202221765639.5U CN202221765639U CN218243094U CN 218243094 U CN218243094 U CN 218243094U CN 202221765639 U CN202221765639 U CN 202221765639U CN 218243094 U CN218243094 U CN 218243094U
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Abstract
The utility model provides a compatible supply circuit of dual supply suitable for intelligence teletransmission electromagnetic water gauge, include: the positive pole of the first direct current power supply end is connected with the non-inverting input end of the voltage comparator, the positive pole of the first diode, the negative pole of the first diode is connected with the output end of the switch and the positive pole of the power output end, the positive pole of the second direct current power supply end is connected with the inverting input end of the voltage comparator and the input end of the switch, the output end of the voltage comparator is connected with the control end of the switch, and the negative pole of the first direct current power supply end is connected with the negative pole of the second direct current power supply end and the negative pole of the power output end. The utility model has the advantages that: the voltage comparator is used for controlling the on-off of the switch, the first direct current power supply end and the second direct current power supply end are selected to be supplied with power, the first direct current power supply end does not interfere with the second direct current power supply end, the purpose that the first direct current power supply end and the second direct current power supply end are compatible for power supply at the same time is achieved, and the power supply stability is improved.
Description
Technical Field
The utility model relates to a supply circuit of electromagnetic water meter specifically relates to a compatible supply circuit of dual supply suitable for intelligence teletransmission electromagnetic water meter.
Background
The intelligent remote transmission electromagnetic water meter is formed by a common electromagnetic water meter and an electronic acquisition and transmission module, can record and store the water consumption of a user in real time or directly read the current accumulated number, and can upload the water meter data to a management system in real time after receiving a meter reading instruction.
The theoretical basis of the electromagnetic water meter and the electromagnetic flow meter is Faraday law of electromagnetic induction, and excitation power consumption occupies most of energy consumption of power supply. In the aspect of instrument power supply, an electromagnetic flowmeter is generally used for industrial metering and basically installed indoors, so that a mains supply product is mainly adopted, and lithium argon sulfuryl chloride batteries are adopted to supply power for some models. The electromagnetic water meter is generally used for industrial and commercial trade metering, so that the lithium-argon-sulfuryl chloride battery is mainly used for supplying power and is suitable for being installed in various environments, and the IP68 protection level is higher than that of a commercial power supply product. With the application of electromagnetic water meters in the scenes of main pipe network monitoring, DMA partition and the like, the lithium argon sulfuryl chloride battery cannot meet the requirements of real-time communication and high-frequency excitation for power supply. In addition, the frequency of excitation once in 20 seconds, 15 seconds and 12 seconds is generally too low, when the water flow which changes rapidly is measured, the response is slow, the water quantity passing through the sensor cannot be measured rapidly and accurately, and application scenes such as main network monitoring and DMA partition and the like require faster metering response and real-time communication function; in order to solve the problem of power supply energy consumption and guarantee the quality of the service life of the whole electromagnetic water meter for more than 6 years, the power supply diversity development trend of the electromagnetic water meter is as follows: solar power supply or commercial power supply is compatible with lithium argon sulfuryl chloride battery power supply.
The application scenes of the electromagnetic water meter are very wide: in order to reduce product varieties as much as possible, reduce production cost and make type selection and ordering simpler for customers, trade metering, cell assessment, supervisor network monitoring, DMA partition metering and the like, the expansibility and compatibility of the electromagnetic water meter are required to be very good, and particularly in the aspect of power supply types: (1) when the electromagnetic water meter is used for trade metering, the communication frequency is not high, the communication is generally carried out once in 6 hours, and the lithium argon sulfuryl chloride battery supplies power to ensure the quality of the whole machine to be guaranteed for 6 years. (2) When the electromagnetic water meter is used for monitoring a main pipe network, the requirement on communication frequency is high, communication is generally carried out once every two minutes, the lithium argon sulfuryl chloride battery cannot guarantee quality guarantee for 6 years due to power supply, namely the lithium argon sulfuryl chloride battery cannot supply power for less than 6 years, and the lithium argon sulfuryl chloride battery is required to be replaced, so that the power supply is unstable; therefore, the electromagnetic water meter is required to be compatible with solar power supply or commercial power supply, and the cost is the lowest on the premise of meeting the 6-year quality guarantee of the electromagnetic water meter.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in providing a compatible supply circuit of dual supply suitable for intelligence teletransmission electromagnetic water meter, improves power supply stability.
The utility model discloses a realize like this: the utility model provides a compatible power supply circuit of dual supply suitable for intelligence teletransmission electromagnetic water gauge, includes:
the power supply comprises a first direct current power supply end, a first diode, a switch, a voltage comparator, a second direct current power supply end and a power supply output end;
the positive electrode of the first direct current power supply end is connected with the non-inverting input end of the voltage comparator, the positive electrode of the first diode, the negative electrode of the first diode is connected with the output end of the switch and the positive electrode of the power output end, the positive electrode of the second direct current power supply end is connected with the inverting input end of the voltage comparator and the input end of the switch, the output end of the voltage comparator is connected with the control end of the switch, and the negative electrode of the first direct current power supply end is connected with the negative electrode of the second direct current power supply end and the negative electrode of the power output end;
when the control end of the switch is at a high level, the input end and the output end of the switch are disconnected, and when the control end of the switch is at a low level, the input end and the output end of the switch are connected.
Furthermore, the switch is a P-type MOS transistor, a gate of the P-type MOS transistor is connected to the output terminal of the voltage comparator, a source of the P-type MOS transistor is connected to the anode of the second dc power supply terminal, and a drain of the P-type MOS transistor is connected to the anode of the power supply output terminal.
The power supply further comprises a second diode, wherein the anode of the second diode is connected with the anode of the second direct current power supply end, and the cathode of the second diode is connected with the anode of the power supply output end.
The power supply circuit further comprises an external power supply end, a rectifier circuit module and a voltage stabilizing circuit module, wherein the external power supply end is connected with the input end of the rectifier circuit module, the output end of the rectifier circuit module is connected with the input end of the voltage stabilizing circuit module, and the output end of the voltage stabilizing circuit module is connected with the first direct current power supply end.
Further, still include solar cell panel, solar cell panel with the external power supply end is connected.
And further, the lithium argon sulfuryl chloride battery is also included and is connected with the second direct current power supply end.
Furthermore, the electromagnetic water meter comprises an electromagnetic water meter mainboard, and the electromagnetic water meter mainboard is connected with the power output end.
The utility model has the advantages that: 1. the voltage comparator is used for controlling the on-off of the switch, the first direct current power supply end and the second direct current power supply end are selected to be supplied with power, the first direct current power supply end does not interfere with the second direct current power supply end, the purpose that the first direct current power supply end and the second direct current power supply end are compatible for power supply at the same time is achieved, and the power supply stability is improved. 2. The lithium argon sulfuryl chloride battery is used, meanwhile, the solar cell panel or the commercial power is compatible with the electromagnetic water meter mainboard for supplying power, the external power supply end is prevented from charging the lithium argon sulfuryl chloride battery, and the risk that the lithium argon sulfuryl chloride battery explodes due to overcharging is avoided.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is the utility model discloses a compatible supply circuit's of dual supply schematic diagram one suitable for intelligence teletransmission electromagnetic water meter.
Fig. 2 is the utility model discloses a compatible supply circuit's of dual supply schematic diagram two suitable for intelligence teletransmission electromagnetic water meter.
Fig. 3 is a schematic circuit diagram of the middle rectifier circuit module and the voltage regulator circuit module of the present invention.
Detailed Description
The embodiment of the utility model provides a through providing a compatible supply circuit of dual supply suitable for intelligence teletransmission electromagnetic water meter, solved among the prior art electromagnetic water meter when being used for the main pipe network control, only adopt the unable shortcoming of guaranteeing the time power supply of guaranteeing of quality of lithium argon sulfuryl chloride battery, realized the compatible power supply of dual supply, improve the technological effect of power supply stability.
The embodiment of the utility model provides an in technical scheme for solving above-mentioned shortcoming, the general thinking is as follows: comparing the voltages of the first direct current power supply end and the second direct current power supply end by using a voltage comparator, and selecting the first direct current power supply end to supply power when the voltage of the first direct current power supply end is higher; and when the voltage of the second direct current power supply terminal is larger, selecting the second direct current power supply terminal to supply power. Alternating current of the external power supply end reaches the first direct current power supply end after rectification and voltage stabilization, and the second direct current power supply end is connected with the lithium argon sulfuryl chloride battery, so that the lithium argon sulfuryl chloride battery is prevented from being charged by the external power supply end.
For better understanding of the above technical solutions, the following detailed descriptions will be provided in conjunction with the drawings and the detailed description of the embodiments.
Referring to fig. 1 to 3, the preferred embodiment of the present invention.
The utility model provides a compatible supply circuit of dual supply suitable for intelligence teletransmission electromagnetic water meter, includes: the power supply circuit comprises a first direct current power supply end Vin1, a first diode D1, a switch Q1, a voltage comparator U1, a second direct current power supply end Vin2 and a power supply output end Vout; the positive electrode of the first direct current power supply terminal Vin1 is connected with the non-inverting input terminal U1 of the voltage comparator U1, the positive electrode of the first diode D1, the negative electrode of the first diode D1 is connected with the output terminal of the switch Q1 and the positive electrode of the power output terminal Vout, the positive electrode of the second direct current power supply terminal Vin2 is connected with the inverting input terminal U2 of the voltage comparator U1 and the input terminal of the switch Q1, the output terminal of the voltage comparator U1 is connected with the control terminal of the switch Q1, and the negative electrode of the first direct current power supply terminal Vin1 is connected with the negative electrode of the second direct current power supply terminal Vin2 and the negative electrode of the power output terminal Vout; when the control end of the switch Q1 is at a high level, the input end and the output end of the switch Q1 are disconnected, and when the control end of the switch Q1 is at a low level, the input end and the output end of the switch Q1 are connected.
When the first dc power supply terminal Vin1 is first connected to the power supply and the second dc power supply terminal Vin2 is not connected to the power supply, the voltage of the first dc power supply terminal Vin1 is greater than that of the second dc power supply terminal Vin2, the voltage comparator U1 outputs a high level to turn off the switch Q1, and the power output terminal Vout is powered by the first dc power supply terminal Vin 1.
When the first dc power supply terminal Vin1 is not connected to the power supply and the second dc power supply terminal Vin2 is connected to the power supply, the voltage of the first dc power supply terminal Vin1 is lower than that of the second dc power supply terminal Vin2, the voltage comparator U1 outputs a low level to turn on the switch Q1, and the power output terminal Vout is powered by the second dc power supply terminal Vin2.
When the first dc power supply terminal Vin1 and the second dc power supply terminal Vin2 are both connected to the power supply, the voltage comparator U1 interprets the output according to the voltage of the first dc power supply terminal Vin1 and the voltage of the second dc power supply terminal Vin2 to control the on/off of the switch Q1, and since the first diode D1 is connected in series to the first current power supply terminal, the second diode has a voltage drop, so that even when the voltage of the first dc power supply terminal Vin1 is equal to the voltage of the second dc power supply terminal Vin2, the current of the first dc power supply terminal Vin1 will not flow to the second dc power supply terminal Vin2.
The switch Q1 is a P-type MOS tube, the grid electrode of the P-type MOS tube is connected with the output end of the voltage comparator U1, the source electrode of the P-type MOS tube is connected with the anode of the second direct current power supply end Vin2, and the drain electrode of the P-type MOS tube is connected with the anode of the power supply output end Vout.
The power supply further comprises a second diode D2, wherein the anode of the second diode D2 is connected with the anode of the second direct current power supply end Vin2, and the cathode of the second diode D2 is connected with the anode of the power output end Vout. When the first dc power supply terminal Vin1 is not connected to a power supply, and the second dc power supply terminal Vin2 is connected to the power supply, the voltage comparator U1 does not operate at the beginning, the current of the second dc power supply terminal Vin2 is output to the power output terminal Vout through the second diode D2, the power output terminal Vout supplies power to the voltage comparator U1, after the voltage comparator U1 operates, it is determined that the voltage of the first dc power supply terminal Vin1 is lower than the voltage of the second dc power supply terminal Vin2, the voltage comparator U1 outputs a low level to turn on the switch Q1, because the tube voltage drop of the second diode D2 is greater than the voltages at the two ends of the switch Q1, the second diode D2 is turned off at this time, the second dc power supply terminal Vin2 supplies power to the power output terminal Vout through the switch tube, and the battery energy connected to the second dc power supply terminal Vin2 is maximally utilized.
The power supply circuit further comprises an external power supply end Vin, a rectifier circuit module M1 and a voltage stabilizing circuit module M2, wherein the external power supply end Vin is connected with the input end of the rectifier circuit module M1, the output end of the rectifier circuit module M1 is connected with the input end of the voltage stabilizing circuit module M2, and the output end of the voltage stabilizing circuit module M2 is connected with the first direct current power supply end Vin 1. When the external power supply terminal Vin is connected to a mains supply, the mains supply is an alternating current, the rectifier circuit module M1 is configured to convert the alternating current into a direct current (the voltage from the mains supply to the direct current is generally 12V or 24V), and the voltage regulator circuit module M2 is configured to stabilize the voltage to a value within a certain range (in this embodiment, the voltage is stabilized to 3.6V-4.0V). The rectifier circuit module M1 and the voltage regulator circuit module M2 are circuit modules in the prior art, and can be referred to as fig. 3.
The solar photovoltaic power generation device is characterized by further comprising a solar cell panel, wherein the solar cell panel is connected with the external power supply end Vin. The external power supply end Vin is powered by a solar panel, the power supply voltage of the solar panel is generally DC 5V-DC 24V, and a colloid battery, a lead-acid battery or a rechargeable lithium battery is generally selected for energy storage. The solar cell panel is in direct current output, and the connection of the interface has positive and negative polarity requirements; because the utility model discloses a rectifier circuit module M1, for nonpolarity input design, whether the interface of outside feeder ear Vin's joint disect insertion solar cell panel need not to distinguish polarity and connects the mistake.
The lithium argon sulfuryl chloride battery is connected with the second direct current power supply end Vin2. The lithium argon sulfuryl chloride cell provided a voltage of 3.6V.
The electromagnetic water meter comprises a power supply output end Vout, and is characterized by further comprising an electromagnetic water meter mainboard, wherein the electromagnetic water meter mainboard is connected with the power supply output end Vout. And providing a power supply for the mainboard of the electromagnetic water meter.
The utility model discloses a dual supply compatible supply circuit's of intelligence teletransmission electromagnetic water meter working method: the external power supply end Vin is connected with a mains supply or a solar panel, the input voltage range is AC/DC 5V-DC 24V, and non-polar input can be realized; after passing through the rectifier circuit module M1 and the voltage stabilizing circuit module M2, the voltage is stabilized to DC3.6V-4.0V and then is transmitted to the first direct current power supply end Vin1; the second direct current power supply terminal Vin2 is connected with the lithium argon sulfuryl chloride battery, and the input voltage is 3.6V. At this time, because the voltage of the first dc power supply terminal Vin1 is greater than the voltage of the second dc power supply terminal Vin2, the voltage comparator U1 disconnects the switch Q1, the first dc power supply terminal Vin1 supplies power to the electromagnetic water meter motherboard, and the first dc power supply terminal Vin1 is prevented from charging the lithium argon sulfuryl chloride battery of the second dc power supply terminal Vin2, thereby preventing the lithium argon sulfuryl chloride battery from exploding due to overcharge. If the mains supply is powered off or the solar panel fails, namely the external power supply end Vin does not receive a power supply, the voltage of the first direct-current power supply end Vin1 is smaller than the voltage of the second direct-current power supply end Vin2, and the voltage comparator U1 enables the switch Q1 to be conducted; the electromagnetic water meter main board is supplied with power by a second direct current power supply terminal Vin2. The technical scheme of the utility model can avoid lithium argon sulfuryl chloride battery to be charged, realize that lithium argon sulfuryl chloride battery and commercial power or solar cell panel are compatible power supply simultaneously, improve power supply stability.
Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.
Claims (7)
1. The utility model provides a compatible supply circuit of dual supply suitable for intelligence teletransmission electromagnetic water meter which characterized in that includes:
the power supply comprises a first direct current power supply end, a first diode, a switch, a voltage comparator, a second direct current power supply end and a power supply output end;
the positive electrode of the first direct current power supply end is connected with the non-inverting input end of the voltage comparator, the positive electrode of the first diode, the negative electrode of the first diode is connected with the output end of the switch and the positive electrode of the power output end, the positive electrode of the second direct current power supply end is connected with the inverting input end of the voltage comparator and the input end of the switch, the output end of the voltage comparator is connected with the control end of the switch, and the negative electrode of the first direct current power supply end is connected with the negative electrode of the second direct current power supply end and the negative electrode of the power output end;
when the control end of the switch is at a high level, the input end and the output end of the switch are disconnected, and when the control end of the switch is at a low level, the input end and the output end of the switch are connected.
2. The dual-power compatible power supply circuit applicable to the intelligent remote-transmission electromagnetic water meter is characterized in that the switch is a P-type MOS (metal oxide semiconductor) tube, a grid electrode of the P-type MOS tube is connected with an output end of the voltage comparator, a source electrode of the P-type MOS tube is connected with a positive electrode of the second direct-current power supply end, and a drain electrode of the P-type MOS tube is connected with a positive electrode of the power supply output end.
3. The compatible power supply circuit of dual power supply suitable for intelligence teletransmission electromagnetism water gauge of claim 2, characterized by, still includes the second diode, the positive pole of the second diode is connected with the positive pole of the second direct current power supply end, the negative pole of the second diode is connected with the positive pole of power output.
4. The dual power compatible power supply circuit for the intelligent remote electromagnetic water meter according to claim 1, further comprising an external power supply terminal, a rectifier circuit module and a voltage stabilizing circuit module, wherein the external power supply terminal is connected to an input terminal of the rectifier circuit module, an output terminal of the rectifier circuit module is connected to an input terminal of the voltage stabilizing circuit module, and an output terminal of the voltage stabilizing circuit module is connected to the first dc power supply terminal.
5. The compatible supply circuit of dual supply suitable for intelligent teletransmission electromagnetism water gauge of claim 4, characterized by, still includes solar cell panel, solar cell panel with the external power supply end is connected.
6. The compatible supply circuit of dual supply suitable for intelligence teletransmission electromagnetism water gauge of claim 1, characterized by, still includes lithium argon sulfuryl chloride battery, lithium argon sulfuryl chloride battery with the second direct current power supply end is connected.
7. The dual power compatible power supply circuit applicable to the intelligent remote-transmission electromagnetic water meter according to claim 1, further comprising an electromagnetic water meter main board, wherein the electromagnetic water meter main board is connected with the power output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221765639.5U CN218243094U (en) | 2022-07-08 | 2022-07-08 | Dual-power compatible power supply circuit suitable for intelligent remote transmission electromagnetic water meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221765639.5U CN218243094U (en) | 2022-07-08 | 2022-07-08 | Dual-power compatible power supply circuit suitable for intelligent remote transmission electromagnetic water meter |
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| Publication Number | Publication Date |
|---|---|
| CN218243094U true CN218243094U (en) | 2023-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221765639.5U Active CN218243094U (en) | 2022-07-08 | 2022-07-08 | Dual-power compatible power supply circuit suitable for intelligent remote transmission electromagnetic water meter |
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| Country | Link |
|---|---|
| CN (1) | CN218243094U (en) |
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2022
- 2022-07-08 CN CN202221765639.5U patent/CN218243094U/en active Active
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