CN220231949U - Power failure detection module and detection circuit of ammeter - Google Patents
Power failure detection module and detection circuit of ammeter Download PDFInfo
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- CN220231949U CN220231949U CN202321605660.3U CN202321605660U CN220231949U CN 220231949 U CN220231949 U CN 220231949U CN 202321605660 U CN202321605660 U CN 202321605660U CN 220231949 U CN220231949 U CN 220231949U
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Abstract
The utility model discloses a power failure detection module and a detection circuit of an ammeter, wherein the detection circuit comprises: the input end of the unidirectional conduction module is connected with the power supply end of the ammeter, and the output end of the unidirectional conduction module is connected with the detection unit of the power failure detection module; the first end of the first voltage dividing module is connected with the anode of the unidirectional conduction module, and the second end of the first voltage dividing module is grounded; the first end of the second voltage dividing module is connected with the anode of the unidirectional conduction module, and the second end of the second voltage dividing module is grounded; and the first detection end of the controller is connected with the voltage acquisition end of the first voltage dividing module, and the second detection end of the controller is connected with the voltage detection end of the second voltage dividing module. According to the technical scheme, the controller is used for detecting the voltage, so that whether the power-down detection module is disconnected with the electric meter or not can be accurately judged, all the modules which are plugged in and plugged out and support power-down reporting are applicable, the electric meter does not need to be redesigned, and development cost and time are saved. The circuit design of the technical scheme is simple, the power supply of the module is not affected, the reverse connection problem can be prevented, and the reliability and the stability of the system are improved.
Description
Technical Field
The utility model relates to the technical field of ammeter detection, in particular to a power failure detection module and a detection circuit of an ammeter.
Background
In the prior art, an ammeter is connected with a power-down detection module, the power-down detection module is a pluggable module, and the power-down detection module is used for reporting a power-down event. When the power-down detection module is replaced, the power-down detection module also reports a power-down event. At this time, it cannot be determined whether the electricity meter is powered down or manually powered down. And a redesign of the electricity meter by changing the structure of the electricity meter requires a significant cost. Therefore, the power-down detection module of the existing ammeter has the problem that whether the ammeter is powered down or the module is manually directly pulled out to power down cannot be distinguished, so that the required event cannot be accurately reported.
Disclosure of Invention
The embodiment of the utility model provides a power-down detection module and a detection circuit thereof for an ammeter, which are used for solving the problem that in the prior art, the power-down detection module of the ammeter cannot distinguish whether the ammeter is powered down or the electricity is directly pulled out by people, so that the accurate reporting of a required event cannot be performed.
An embodiment of the present utility model provides a detection circuit of a power failure detection module of an electric meter, which is characterized in that the detection circuit includes:
the input end of the unidirectional conduction module is connected with the power supply end of the ammeter, and the output end of the unidirectional conduction module is connected with the detection unit of the power failure detection module;
the first end of the first voltage dividing module is connected with the anode of the unidirectional conduction module, and the second end of the first voltage dividing module is grounded;
the first end of the second voltage dividing module is connected with the anode of the unidirectional conduction module, and the second end of the second voltage dividing module is grounded;
and the first detection end of the controller is connected with the voltage acquisition end of the first voltage dividing module, and the second detection end of the controller is connected with the voltage detection end of the second voltage dividing module.
Preferably, the unidirectional conduction module is a diode D1, an anode of the diode D1 is an input end of the unidirectional conduction module, and an cathode of the diode D1 is an output end of the unidirectional conduction module.
Preferably, the first voltage dividing module includes a resistor R1, a resistor R2, and a capacitor C1, where a first end of the resistor R1 is a first end of the first voltage dividing module, a second end of the resistor R1 is connected to a first end of the resistor R2 and a first end of the capacitor C1, and a second end of the resistor R2 and a second end of the capacitor C1 are connected together to form a second end of the first voltage dividing module.
Preferably, the second voltage dividing module includes a resistor R3, a resistor R4, and a capacitor C2, where a first end of the resistor R3 is a first end of the first voltage dividing module, a second end of the resistor R3 is connected to the first end of the resistor R4 and the first end of the capacitor C2, and a second end of the resistor R4 and a second end of the capacitor C2 are connected together to form a second end of the second voltage dividing module.
Preferably, the controller is a chip MG33a045EV, a lower pin of the chip MG33a045EV is connected to the first end of the resistor R2, and a poweroff pin of the chip MG33a045EV is connected to the first end of the resistor R4.
A second aspect of the embodiment of the present utility model provides a power failure detection module of an electric meter, including the detection circuit and the detection unit provided in the first aspect.
The technical effects of the embodiment of the utility model are as follows: the technical scheme can determine whether the ammeter is powered down or the power-down detection module is separated from the ammeter, is suitable for all modules which are plugged in and plugged out and support power-down reporting, does not need to redesign the ammeter, and saves development cost and time. The circuit design of the technical scheme is simple, the power supply of the module is not affected, the reverse connection problem can be prevented, and the reliability and the stability of the system are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments of the present utility model will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a detection circuit of a power failure detection module of an electric meter according to an embodiment of the present utility model;
fig. 2 is a partial circuit diagram of a detection circuit of a power failure detection module of an electric meter according to an embodiment of the present utility model;
fig. 3 is a circuit diagram of a controller of a detection circuit of a power-down detection module of an electric meter according to an embodiment of the present utility model;
in the figure: 101. an electricity meter; 102. a unidirectional conduction module; 103. a detection module; 104. a first voltage dividing module; 105. a second voltage dividing module; 106. and a controller.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be understood that the present utility model may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. In the drawings, the dimensions and relative dimensions of layers and regions may be exaggerated for the same elements throughout for clarity.
It will be understood that when an element or layer is referred to as being "on" …, "" adjacent to "…," "connected to" or "coupled to" another element or layer, it can be directly on, adjacent to, connected to or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on" …, "" directly adjacent to "…," "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present utility model.
Spatially relative terms, such as "under …," "under …," "below," "under …," "above …," "above," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "under" or "beneath" other elements would then be oriented "on" the other elements or features. Thus, the exemplary terms "under …" and "under …" may include both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of the associated listed items.
In the following description, for the purpose of providing a thorough understanding of the present utility model, detailed structures and steps are presented in order to illustrate the technical solution presented by the present utility model. Preferred embodiments of the present utility model are described in detail below, however, the present utility model may have other embodiments in addition to these detailed descriptions.
Example 1
The embodiment of the utility model provides a power-down detection module and a detection circuit thereof for an ammeter, which are used for solving the problem that in the prior art, the power-down detection module of the ammeter cannot distinguish whether the ammeter is powered down or the electricity is directly pulled out by people, so that the electricity cannot be accurately reported.
In a first technical solution provided in a first embodiment of the present utility model, as shown in fig. 1, a detection circuit 100 of a power failure detection module of an electric meter is provided, where the detection circuit 100 includes:
the input end of the unidirectional conduction module 102 is connected with the power supply end of the ammeter 101, and the output end of the unidirectional conduction module is connected with the detection unit 103 of the power failure detection module;
a first voltage dividing module 104, a first end of which is connected with the anode of the unidirectional conduction module, and a second end of which is grounded;
a second voltage dividing module 105, a first end of which is connected with the anode of the unidirectional conduction module, and a second end of which is grounded;
and a first detection end of the controller 106 is connected with the voltage acquisition end of the first voltage dividing module 104, and a second detection end of the controller is connected with the voltage detection end of the second voltage dividing module 105.
The detecting unit 103 is used for detecting whether the electric meter continuously outputs current or not, and further detecting whether the electric meter 101 is powered down or not, and the detecting unit 103 is a module for detecting current in the existing power-down detecting module.
The unidirectional conduction module 102 is a diode D1, an anode of the diode D1 is an input end of the unidirectional conduction module 102, and a cathode of the diode D1 is an output end of the unidirectional conduction module 102.
The first voltage dividing module 104 includes a resistor R1, a resistor R2, and a capacitor C1, wherein a first end of the resistor R1 is a first end of the first voltage dividing module 104, a second end of the resistor R1 is connected to the first end of the resistor R2 and the first end of the capacitor C1, and a second end of the resistor R2 and a second end of the capacitor C1 are commonly grounded.
The second voltage dividing module 105 includes a resistor R3, a resistor R4, and a capacitor C2, wherein a first end of the resistor R3 is a first end of the first voltage dividing module 104, a second end of the resistor R3 is connected to the first end of the resistor R4 and the first end of the capacitor C2, and a second end of the resistor R4 and a second end of the capacitor C2 are commonly grounded.
The controller 106 is a first terminal of a resistor R2 connected to a lower pin of the chip MG33a045EV, and a first terminal of a resistor R4 connected to a poweroff pin of the chip MG33a045 EV.
The working process of the technical scheme is as follows:
when the electricity meter 101 stops supplying electricity to the power-down detection module 10, the detection unit 103 detects that the electricity meter 101 is powered down, and the chip MG33a045EV further detects the cause of the power-down. After the pin lower of the chip MG33A045EV detects low voltage, the voltage is detected by the ADC pin poweroff, the residual voltage exists in the ammeter 101, the voltage value detected by the ADC is not 0V, the chip MG33A045EV detects that the power-down detection module 100 is not disconnected from the ammeter 101, and at the moment, the power-down information can be reported. When the pin lower of the chip MG33a045EV detects low voltage, the ADC pin poweroff detects voltage, and the voltage detected by the ADC is 0V due to the reverse non-conducting characteristic of the diode D1, and the chip MG33a045EV detects that the power failure detection module is disconnected from the electric meter 101, at this time, no power failure information or no information separated from the electric meter may be reported.
The technical effect of the technical scheme provided by the first embodiment is as follows: according to the technical scheme, whether the power failure detection module is disconnected from the ammeter or not can be accurately judged through the pin lower of the chip MG33A045EV and the ADC pin poweroff detection voltage. And according to the power failure detection result, the controller can report power failure information or separation information. When the power failure detection module detects that the power failure detection module is not disconnected with the ammeter, power failure information can be reported, and accurate state feedback is provided. The technical scheme is suitable for all modules which are plugged and unplugged and support power failure reporting, an ammeter does not need to be redesigned, and development cost and time are saved. The circuit design of the technical scheme is simple, the power supply of the module is not affected, the reverse connection problem can be prevented, and the reliability and the stability of the system are improved.
Example two
The second embodiment of the utility model provides a power failure detection module of an ammeter, which comprises a detection circuit and a detection unit provided by the first embodiment.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model, and are intended to be included in the scope of the present utility model.
Claims (6)
1. A detection circuit of a power down detection module of an electric meter, the detection circuit comprising:
the input end of the unidirectional conduction module is connected with the power supply end of the ammeter, and the output end of the unidirectional conduction module is connected with the detection unit of the power failure detection module;
the first end of the first voltage dividing module is connected with the anode of the unidirectional conduction module, and the second end of the first voltage dividing module is grounded;
the first end of the second voltage dividing module is connected with the anode of the unidirectional conduction module, and the second end of the second voltage dividing module is grounded;
and the first detection end of the controller is connected with the voltage acquisition end of the first voltage dividing module, the second detection end of the controller is connected with the voltage detection end of the second voltage dividing module, and the input end of the controller is connected with the output end of the detection unit.
2. The detection circuit of claim 1, wherein the unidirectional conduction module is a diode D1, an anode of the diode D1 is an input terminal of the unidirectional conduction module, and a cathode of the diode D1 is an output terminal of the unidirectional conduction module.
3. The detection circuit of claim 1, wherein the first voltage dividing module comprises a resistor R1, a resistor R2 and a capacitor C1, the first end of the resistor R1 is the first end of the first voltage dividing module, the second end of the resistor R1 is connected to the first end of the resistor R2 and the first end of the capacitor C1, and the second end of the resistor R2 and the second end of the capacitor C1 are commonly connected to the second end of the first voltage dividing module.
4. The detection circuit of claim 3, wherein the second voltage dividing module comprises a resistor R3, a resistor R4 and a capacitor C2, the first end of the resistor R3 is the first end of the first voltage dividing module, the second end of the resistor R3 is connected to the first end of the resistor R4 and the first end of the capacitor C2, and the second end of the resistor R4 and the second end of the capacitor C2 are commonly connected to the second end of the second voltage dividing module.
5. The detection circuit of claim 4, wherein the controller is a chip MG33a045EV, a lower pin of the chip MG33a045EV is connected to the first end of the resistor R2, and a poweroff pin of the chip MG33a045EV is connected to the first end of the resistor R4.
6. A power down detection module for an electric meter, wherein the power down detection module comprises the detection circuit and the detection unit according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321605660.3U CN220231949U (en) | 2023-06-21 | 2023-06-21 | Power failure detection module and detection circuit of ammeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321605660.3U CN220231949U (en) | 2023-06-21 | 2023-06-21 | Power failure detection module and detection circuit of ammeter |
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| Publication Number | Publication Date |
|---|---|
| CN220231949U true CN220231949U (en) | 2023-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321605660.3U Active CN220231949U (en) | 2023-06-21 | 2023-06-21 | Power failure detection module and detection circuit of ammeter |
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| Country | Link |
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| CN (1) | CN220231949U (en) |
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- 2023-06-21 CN CN202321605660.3U patent/CN220231949U/en active Active
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