CN214067251U - Intelligent electric energy meter with built-in load switch calibration circuit - Google Patents
Intelligent electric energy meter with built-in load switch calibration circuit Download PDFInfo
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- CN214067251U CN214067251U CN202022838531.1U CN202022838531U CN214067251U CN 214067251 U CN214067251 U CN 214067251U CN 202022838531 U CN202022838531 U CN 202022838531U CN 214067251 U CN214067251 U CN 214067251U
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- 230000003287 optical effect Effects 0.000 description 12
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- 238000010586 diagram Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
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Abstract
The application provides an intelligent electric energy meter of built-in load switch check-up circuit, include electric energy meter casing and install the intelligent electric energy meter of electronic type in the electric energy meter casing, the intelligent electric energy meter of electronic type is built-in load switch's prepayment control formula, its characterized in that: the input end of the checking circuit is connected with the output end of the load switch, and the output end of the checking circuit is connected with a prepayment controller of the intelligent electric energy meter; the checking circuit comprises a full-bridge rectification ZL1 and an indicator light LED1, the input end of the full-bridge rectification ZL1 is connected with the output end of the load switch, the positive output end of the full-bridge rectification ZL1 is connected with the anode of the indicator light LED1, and the cathode of the indicator light LED1 is connected with the negative output end of the full-bridge rectification ZL 1. The method and the device can accurately check the opening/closing state of the load switch after the prepayment controller sends the instruction, find the problem of failure of closing and opening in time, and facilitate the prepayment electric energy meter to further process the fault.
Description
Technical Field
The application relates to the technical field of electronic intelligent electric energy meters, in particular to an intelligent electric energy meter with a built-in load switch calibration circuit.
Background
At present, a built-in prepayment controller commonly used by an electronic intelligent electric energy meter controls the opening/closing of a load switch. However, in the use process of the prepaid controller, the function of the electronic intelligent electric energy meter defaulting tripping is affected due to the reasons that the prepaid control circuit is damaged, the external load switch is connected, the external load switch is damaged, or a tripping control loop is damaged artificially or the electronic intelligent electric energy meter is manually and forcibly switched on after tripping. In addition, due to the lack of the on/off detection of the load switch, the phenomenon of the on/off failure cannot be perceived. At present, whether current exists after the switch-on/switch-off of some products is taken as the basis of whether the switch-on/switch-off is successful or not. The current is used as a dynamically changing parameter, on one hand, the judgment result has time delay, on the other hand, a certain judgment threshold value needs to be set through current judgment, and when the load current changes around the judgment threshold value, the judgment result also changes repeatedly and is in an uncertain state.
Therefore, there is a need for an electronic intelligent electric energy meter capable of accurately checking the on/off state of a load switch.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an intelligent electric energy meter of built-in load switch check-up circuit, include the electric energy meter casing and install the intelligent electric energy meter of electronic type in the electric energy meter casing, the intelligent electric energy meter of electronic type is built-in load switch's prepayment control formula, its characterized in that: the intelligent electric energy meter further comprises a checking circuit used for checking whether the load switch is in a normally open/closing state, wherein the input end of the checking circuit is connected with the output end of the load switch, and the output end of the checking circuit is connected with a prepayment controller of the intelligent electric energy meter;
the checking circuit comprises a full-bridge rectification ZL1 and an indicator light LED1, the input end of the full-bridge rectification ZL1 is connected with the output end of the load switch, the positive output end of the full-bridge rectification ZL1 is connected with the anode of the indicator light LED1, and the cathode of the indicator light LED1 is connected with the negative output end of the full-bridge rectification ZL 1.
Further, the verification circuit further comprises a filter capacitor C1, one end of the filter capacitor C1 is connected with a common connection point of a positive output end of the full-bridge rectifier ZL1 and an anode of the indicator light LED1, and the other end of the filter capacitor C1 is connected with a common connection point of a negative output end of the full-bridge rectifier ZL1 and a cathode of the indicator light LED 1.
Further, the filter capacitor C1 is configured to filter the dc power output from the full-bridge rectifier ZL1, and output the filtered dc power to the indicator light LED 1.
Further, the check circuit further comprises a resistor R1 and an optical coupler G1, the anode of a light emitting diode of the optical coupler G1 is connected with the common connection point of the anodes of a filter capacitor C1 and an indicator light LED1, the cathode of the light emitting diode of the optical coupler G1 is connected with the common connection point of the cathodes of a filter capacitor C1 and an indicator light LED1, the collector of a triode of the optical coupler G1 is connected with a power supply, the emitter of the optical coupler G1 is connected with one end of the resistor R1, the other end of the resistor R1 is grounded, and the common connection point of the emitter of the optical coupler G1 and the resistor R1 is connected with a prepayment controller of the intelligent electric energy meter.
Further, the power supply is a power supply of the intelligent electric energy meter.
Further, the power supply is 3.5V.
The utility model has the advantages of: the on/off state of the load switch can be automatically detected when the electric energy meter is electrified for the first time, so that the load switch is prevented from being burnt out due to abnormal work or overlarge current of the load switch; in addition, the on/off state of the load switch after the prepayment controller sends an instruction can be detected in the using process, the problem of failure in switching on and off can be found in time, and the prepayment electric energy meter can further process the fault conveniently.
Drawings
The invention will be further described with reference to the following figures and examples:
fig. 1 is a schematic structural diagram of the present application.
Fig. 2 is a circuit schematic diagram of a verification circuit of the present application.
Detailed Description
The invention is further explained by the following combined with the attached drawings of the specification:
the utility model provides an intelligent electric energy meter of built-in load switch check-up circuit, include the electric energy meter casing and install the intelligent electric energy meter of electronic type in the electric energy meter casing, the intelligent electric energy meter of electronic type is built-in load switch's prepayment control formula, its characterized in that: as shown in fig. 1, a calibration circuit for calibrating whether the load switch is in a normally open/closed state is further included, an input end of the calibration circuit is connected with an output end of the load switch, and an output end of the calibration circuit is connected with a prepaid controller of the intelligent electric energy meter;
as shown in fig. 2, the verification circuit includes a full-bridge rectifier ZL1 and an indicator light LED1, an input terminal of the full-bridge rectifier ZL1 is connected to an output terminal of the load switch, a positive output terminal of the full-bridge rectifier ZL1 is connected to an anode of the indicator light LED1, and a cathode of the indicator light LED1 is connected to a negative output terminal of the full-bridge rectifier ZL 1.
The electronic intelligent electric energy meter generally adopts a built-in magnetic latching type load switch, when the electric energy meter leaves a factory and is transported, a movable contact and a fixed contact inside the load switch are in a normally closed state, and due to the special structure of the load switch, in the bumping of the electric energy meter in the transportation process, the contact of the load switch is often disengaged or the contact pressure is insufficient, so that the movable contact and the fixed contact are closed abnormally. Above-mentioned technical scheme, after intelligent electric energy meter was first electrified, the staff of installation electronic type intelligent electric energy meter is told to the bright/go out of accessible pilot lamp LED1, and whether load switch is in the closure condition, closing state promptly, avoids because of the damage that load switch closure condition leads to unusually.
In this embodiment, the verification circuit further includes a filter capacitor C1, one end of the filter capacitor C1 is connected to a common connection point between the positive output terminal of the full-bridge rectifier ZL1 and the anode of the indicator light LED1, and the other end of the filter capacitor C1 is connected to a common connection point between the negative output terminal of the full-bridge rectifier ZL1 and the cathode of the indicator light LED 1. The filter capacitor C1 is used for filtering the direct current output by the full-bridge rectifier ZL1 and outputting the filtered direct current to the indicator light LED 1. The filter capacitor C1 is used to reduce the ripple factor of the ac pulse to improve the efficiency of smoothing the dc output. By adopting the technical scheme, the service life of the indicator light LED1 is prolonged once.
In this embodiment, the verification circuit further includes a resistor R1 and an optical coupler G1, an anode of a light emitting diode of the optical coupler G1 is connected to a common connection point of anodes of the filter capacitor C1 and the indicator light LED1, a cathode of a light emitting diode of the optical coupler G1 is connected to a common connection point of a cathode of the filter capacitor C1 and a cathode of the indicator light LED1, a collector of a triode of the optical coupler G1 is connected to a power supply, an emitter of the optical coupler G1 is connected to one end of the resistor R1, and the other end of the resistor R1 is grounded, wherein the common connection point of the emitter of the optical coupler G1 and the resistor R1 is connected to a prepaid controller of the intelligent electric energy meter. The on-off of an optocoupler G1 reflects the on/off state of the load switch, when the load switch is in the on state, the optocoupler G1 is switched on, a common connection point of a resistor R1 and an emitter of a triode of the optocoupler G1 outputs a high level, when the load switch is in the on state, the optocoupler G1 is switched off, a common connection point of a resistor R1 and an emitter of a triode of the optocoupler G1 outputs a low level, and the prepayment controller can judge the on/off state of the load switch through the received high and low levels of the common connection points of the emitters of the resistors R1 and the triode of the optocoupler G1; according to the technical scheme, the on/off state of the load switch after the prepayment controller sends the instruction can be detected in the using process, the problem of failure in switching on and off can be found in time, and the prepayment electric energy meter can further process the fault conveniently.
In this embodiment, the power supply is a power supply of the intelligent electric energy meter. The power supply is 3.5V.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (6)
1. The utility model provides an intelligent ammeter of built-in load switch check-up circuit, includes the electric energy meter casing and installs the intelligent ammeter of electronic type in the electric energy meter casing, the intelligent ammeter of electronic type is built-in load switch's prepayment control formula, its characterized in that: the intelligent electric energy meter further comprises a checking circuit for checking whether the load switch is in a normally open/closed state, wherein the input end of the checking circuit is connected with the output end of the load switch, and the output end of the checking circuit is connected with a prepayment controller of the intelligent electric energy meter;
the checking circuit comprises a full-bridge rectification ZL1 and an indicator light LED1, the input end of the full-bridge rectification ZL1 is connected with the output end of the load switch, the positive output end of the full-bridge rectification ZL1 is connected with the anode of the indicator light LED1, and the cathode of the indicator light LED1 is connected with the negative output end of the full-bridge rectification ZL 1.
2. The intelligent electric energy meter with the built-in load switch check circuit as claimed in claim 1, wherein: the checking circuit further comprises a filter capacitor C1, one end of the filter capacitor C1 is connected with a common connection point of a positive output end of the full-bridge rectifier ZL1 and an anode of the indicator light LED1, and the other end of the filter capacitor C1 is connected with a common connection point of a negative output end of the full-bridge rectifier ZL1 and a cathode of the indicator light LED 1.
3. The intelligent electric energy meter with the built-in load switch check circuit as claimed in claim 2, wherein: the filter capacitor C1 is used for filtering the direct current output by the full-bridge rectifier ZL1 and outputting the filtered direct current to the indicator light LED 1.
4. The intelligent electric energy meter with the built-in load switch check circuit as claimed in claim 2, wherein: the checking circuit further comprises a resistor R1 and an optocoupler G1, the anode of a light emitting diode of the optocoupler G1 is connected with the common connection point of the anodes of a filter capacitor C1 and an indicator light LED1, the cathode of the light emitting diode of the optocoupler G1 is connected with the common connection point of the cathode of a filter capacitor C1 and the cathode of an indicator light LED1, the collector of a triode of the optocoupler G1 is connected with a power supply, the emitter of the optocoupler G1 is connected with one end of the resistor R1, the other end of the resistor R1 is grounded, and the common connection point of the emitter of the optocoupler G1 and the resistor R1 is connected with a prepayment controller of the intelligent electric.
5. The intelligent electric energy meter with the built-in load switch check circuit according to claim 4, characterized in that: the power supply is a power supply of the intelligent electric energy meter.
6. The intelligent electric energy meter with the built-in load switch check circuit as claimed in claim 5, wherein: the power supply is 3.5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022838531.1U CN214067251U (en) | 2020-11-30 | 2020-11-30 | Intelligent electric energy meter with built-in load switch calibration circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022838531.1U CN214067251U (en) | 2020-11-30 | 2020-11-30 | Intelligent electric energy meter with built-in load switch calibration circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214067251U true CN214067251U (en) | 2021-08-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022838531.1U Active CN214067251U (en) | 2020-11-30 | 2020-11-30 | Intelligent electric energy meter with built-in load switch calibration circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214067251U (en) |
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2020
- 2020-11-30 CN CN202022838531.1U patent/CN214067251U/en active Active
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