CN215493819U - Device for conveniently detecting on-off state of magnetic latching relay in prepayment electric energy meter - Google Patents
Device for conveniently detecting on-off state of magnetic latching relay in prepayment electric energy meter Download PDFInfo
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- CN215493819U CN215493819U CN202122130477.XU CN202122130477U CN215493819U CN 215493819 U CN215493819 U CN 215493819U CN 202122130477 U CN202122130477 U CN 202122130477U CN 215493819 U CN215493819 U CN 215493819U
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- latching relay
- magnetic latching
- electrically connected
- monitoring circuit
- voltage monitoring
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Abstract
The utility model discloses a device for conveniently detecting the on-off state of a magnetic latching relay in a prepayment electric energy meter, which comprises a voltage monitoring circuit, a microprocessor MCU, an indicator lamp, a display module and a communication module, wherein the voltage monitoring circuit is connected with the microprocessor MCU; the input end of the voltage monitoring circuit is electrically connected with the wire outlet end of the magnetic latching relay, the output end of the voltage monitoring circuit is electrically connected with the microprocessor MCU, and the indicator lamp, the display module and the communication module are all electrically connected with the microprocessor MCU. The voltage monitoring circuit includes: the first input end of the rectifier bridge stack is electrically connected with an alternating current zero line, the second input end is electrically connected with a wire outlet end of the magnetic latching relay, the first output end is electrically connected with a cathode of a diode, the second output end is electrically connected with the second input end of a light couple through a first resistor, an anode of the diode is electrically connected with the first input end of the light couple, the first output end of the light couple is electrically connected with 3.3V voltage, and the second output end of the light couple is electrically connected with a microprocessor MCU and is grounded through a first capacitor, a second resistor and a second capacitor respectively.
Description
Technical Field
The utility model belongs to the technical field of electronic instruments, and relates to a device for conveniently detecting the on-off state of a magnetic latching relay in a prepayment electric energy meter.
Background
With the increasing development of society and the increasing shortage of internal resources of commercial buildings, the small-size prepayment electric energy meter is more and more widely applied, which also puts higher requirements on the prepayment electric energy meter.
When the traditional prepayment electric energy meter is applied, two processing modes are provided for the detection of the internal magnetic latching relay:
1. and the on-off state is judged only according to the execution results of different control commands without on-off detection.
2. And detecting and judging the on-off state of the magnetic latching wire outlet end externally by using a voltage monitoring device.
Both of the above two methods have disadvantages and inconveniences:
the first method cannot correctly detect the on-off condition of the magnetic latching relay.
The second mode has large integral structure volume, high cost and complex wiring.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems and the defects in the prior art, the utility model provides a novel device for conveniently detecting the on-off state of a magnetic latching relay in a prepayment electric energy meter.
The utility model solves the technical problems through the following technical scheme:
the utility model provides a device for conveniently detecting the on-off state of a magnetic latching relay in a prepaid electric energy meter, which is characterized by comprising a voltage monitoring circuit, a microprocessor MCU, an indicator light, a display module and a communication module.
The input end of the voltage monitoring circuit is electrically connected with the wire outlet end of the magnetic latching relay, the output end of the voltage monitoring circuit is electrically connected with the microprocessor MCU, the indicator lamp, the display module and the communication module are electrically connected with the microprocessor MCU, and the communication module is in communication connection with the upper computer.
The voltage monitoring circuit comprises a rectifier bridge stack (BR1), a diode (D1), a first resistor (R16), a light couple (N1), a first capacitor (C7), a second resistor (R18) and a second capacitor (C4).
Alternating current zero line, the leading-out terminal of magnetic latching relay are connected to the first input electricity of rectifier bridge stack (BR1), second input electricity, the first output electricity connects the negative pole of diode (D1), the second input that the second output passes through first resistance (R16) electricity connection optical couple (N1), the first input of the positive pole electricity connection optical couple (N1) of diode (D1), 3.3V voltage is connected to the first output electricity of optical couple (N1), microprocessor MCU is connected to the second output electricity of optical couple (N1), and ground connection through first electric capacity (C7), second resistance (R18) and second electric capacity (C4) respectively.
Preferably, the indicator light is an LED indicator light.
Preferably, the display module is an LCD display module.
Preferably, the communication module is a wireless communication module.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the utility model.
The positive progress effects of the utility model are as follows:
the voltage monitoring circuit always monitors the voltage of the outlet line of the magnetic latching relay, the voltage is converted into a switching signal through the optical coupler and then enters the microprocessor MCU, the microprocessor MCU judges the on-off condition of the magnetic latching relay according to the switching signal, the on-off condition of the magnetic latching relay is subjected to state feedback through the LED indicator lamp, the LCD display module and the wireless communication module, and the on-off condition of the magnetic latching relay in the prepayment electric energy meter can be conveniently detected.
Drawings
Fig. 1 is a schematic structural diagram of a device for conveniently detecting on/off of a magnetic latching relay in a prepaid electric energy meter according to a preferred embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a voltage monitoring circuit according to a preferred embodiment of the utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, the embodiment provides a device for conveniently detecting the on-off state of a magnetic latching relay in a prepaid electric energy meter, which comprises a voltage monitoring circuit, a microprocessor MCU, an LED indicator lamp, an LCD display module and a wireless communication module.
The input end of the voltage monitoring circuit is electrically connected with the wire outlet end of the magnetic latching relay, the output end of the voltage monitoring circuit is electrically connected with the microprocessor MCU, the indicator lamp, the display module and the communication module are electrically connected with the microprocessor MCU, and the communication module is in communication connection with the upper computer.
As shown in fig. 2, the voltage monitoring circuit includes a bridge rectifier (BR1), a diode (D1), a first resistor (R16), an optical coupler (N1), a first capacitor (C7), a second resistor (R18), and a second capacitor (C4). Alternating current zero line, the leading-out terminal of magnetic latching relay are connected to the first input electricity of rectifier bridge stack (BR1), second input electricity, the first output electricity connects the negative pole of diode (D1), the second input that the second output passes through first resistance (R16) electricity connection optical couple (N1), the first input of the positive pole electricity connection optical couple (N1) of diode (D1), 3.3V voltage is connected to the first output electricity of optical couple (N1), microprocessor MCU is connected to the second output electricity of optical couple (N1), and ground connection through first electric capacity (C7), second resistance (R18) and second electric capacity (C4) respectively.
When the prepayment electric energy meter is in operation, the internal voltage monitoring circuit monitors the terminal voltage of the outlet wire of the magnetic latching relay all the time, the terminal voltage is converted into a switching signal through the optical coupler and then enters the microprocessor MCU, the microprocessor MCU judges the on-off condition of the magnetic latching relay according to the switching signal, the on-off condition of the magnetic latching relay is subjected to state feedback through the LED indicating lamp, the LCD display module and the wireless communication module, and the wireless communication module uploads the on-off condition of the magnetic latching relay to an upper computer.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications are within the scope of the utility model.
Claims (4)
1. A device for conveniently detecting the on-off state of a magnetic latching relay in a prepaid electric energy meter is characterized by comprising a voltage monitoring circuit, a microprocessor MCU, an indicator light, a display module and a communication module;
the input end of the voltage monitoring circuit is electrically connected with the wire outlet end of the magnetic latching relay, the output end of the voltage monitoring circuit is electrically connected with the microprocessor MCU, the indicator lamp, the display module and the communication module are electrically connected with the microprocessor MCU, and the communication module is in communication connection with the upper computer;
the voltage monitoring circuit comprises a rectifier bridge stack (BR1), a diode (D1), a first resistor (R16), a light couple (N1), a first capacitor (C7), a second resistor (R18) and a second capacitor (C4);
alternating current zero line, the leading-out terminal of magnetic latching relay are connected to the first input electricity of rectifier bridge stack (BR1), second input electricity, the first output electricity connects the negative pole of diode (D1), the second input that the second output passes through first resistance (R16) electricity connection optical couple (N1), the first input of the positive pole electricity connection optical couple (N1) of diode (D1), 3.3V voltage is connected to the first output electricity of optical couple (N1), microprocessor MCU is connected to the second output electricity of optical couple (N1), and ground connection through first electric capacity (C7), second resistance (R18) and second electric capacity (C4) respectively.
2. The device for conveniently detecting the on-off state of the magnetic latching relay in the prepaid electric energy meter according to claim 1, wherein the indicator light is an LED indicator light.
3. The device for conveniently detecting the on-off of the magnetic latching relay in the prepaid electric energy meter according to claim 1, wherein the display module is an LCD display module.
4. The device for conveniently detecting the on-off of the magnetic latching relay in the prepaid electric energy meter according to claim 1, wherein the communication module is a wireless communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122130477.XU CN215493819U (en) | 2021-09-06 | 2021-09-06 | Device for conveniently detecting on-off state of magnetic latching relay in prepayment electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122130477.XU CN215493819U (en) | 2021-09-06 | 2021-09-06 | Device for conveniently detecting on-off state of magnetic latching relay in prepayment electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215493819U true CN215493819U (en) | 2022-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122130477.XU Active CN215493819U (en) | 2021-09-06 | 2021-09-06 | Device for conveniently detecting on-off state of magnetic latching relay in prepayment electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215493819U (en) |
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2021
- 2021-09-06 CN CN202122130477.XU patent/CN215493819U/en active Active
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