Metering parameter detection device for intelligent electric energy meter

Abstract

The utility model discloses a metering parameter detection device for an intelligent electric energy meter. The metering parameter detection device comprises a voltage signal generation module, a voltage sampling module, a current sampling module, an RS485 communication module and a display module, the voltage signal generation module is respectively connected with the voltage sampling module, the current sampling module, the RS485 communication module and the display module in sequence; the voltage signal generation module is used for generating a standard sinusoidal voltage signal; the voltage sampling module is used for collecting voltage values at two ends of the intelligent electric energy meter; the current sampling module is used for collecting current values at two ends of the intelligent electric energy meter; the RS485 communication module is used for realizing data interaction with an intelligent electric energy meter and acquiring an AD value in a metering chip; the display module is used for displaying a test process, setting a sine voltage signal amplitude and performing fault alarm; according to the application, component faults and batch hidden dangers in batch production of the intelligent electric energy meters can be found in time, and the metering reliability of the intelligent electric energy meters can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to electric energy meters, and in particular to a metering parameter detection device for an intelligent electric energy meter. Background Art

[0002] Smart meters, as terminal metering instruments in power systems, especially three-phase smart meters, involve large amounts of electricity consumption, and require much higher accuracy and consistency than single-phase smart meters. The main problem solved by the detection device of the present invention is to accurately detect the metering circuit of the three-phase smart meter in production to ensure that each smart three-phase meter measures accurately and reliably. Utility Model Content

[0003] The purpose of the utility model is to provide a smart electric energy meter measurement parameter detection device, which can timely discover component failures and batch hidden dangers occurring in the batch production of smart electric energy meters, and greatly improve the measurement reliability of smart electric energy meters.

[0004] To achieve the above object, the technical solution adopted by the utility model is: an intelligent electric energy meter measurement parameter detection device, including a voltage signal generation module, a voltage sampling module, a current sampling module, an RS485 communication module and a display module;

[0005] The voltage signal generating module is connected to the voltage sampling module, the current sampling module, the RS485 communication module and the display module respectively in sequence;

[0006] The voltage signal generating module is used to generate a standard sinusoidal voltage signal;

[0007] The voltage sampling module is used to collect the voltage values ​​at both ends of the smart electric energy meter;

[0008] The current sampling module is used to collect the current values ​​at both ends of the smart electric energy meter;

[0009] The RS485 communication module is used to realize data interaction with the smart electric energy meter and obtain the AD value inside the metering chip;

[0010] The display module is used to display the test process, set the amplitude of the sinusoidal voltage signal and alarm for faults.

[0011] In a preferred solution, the standard sinusoidal voltage signal generated by the voltage signal generating module is 50 Hz.

[0012] In a preferred solution, the voltage sampling module is controlled by a voltage sampling circuit.

[0013] In a preferred embodiment, the voltage sampling circuit includes 7 resistors and 2 capacitors, wherein 5 resistors are connected in series in sequence and then connected in series with 1 capacitor, and 1 resistor is connected in parallel on one side of the capacitor; another capacitor is connected in series with 1 resistor and then connected in parallel with the previous capacitor.

[0014] In a preferred solution, the current sampling module is controlled by a current sampling circuit.

[0015] In a preferred embodiment, the current sampling circuit includes a miniature circuit breaker, a current transformer with four interfaces, four resistors and two capacitors; the miniature circuit breaker is connected to two interfaces of the current transformer; the other two interfaces of the current transformer are respectively connected in series with one resistor and one capacitor; two resistors are also connected in parallel between the two interfaces of the current transformer; one end of the two capacitors are grounded.

[0016] Due to the application of the above technical solution, the beneficial effects of the present application compared with the prior art are:

[0017] The present application discloses a smart energy meter metering parameter detection device. Through the design of a voltage signal generating module, a voltage sampling module, a current sampling module, an RS485 communication module and a display module, the voltage sampling module collects voltage values, the current sampling module collects current values, the voltage signal generating module generates a standard sinusoidal voltage signal, and then reads the AD value sampled by the metering chip inside the smart meter. By analyzing and comparing the AD value stored in the same specification meter stored in the MES system in the factory, it is determined whether the metering circuit is abnormal and whether the metering of each batch is consistent. By accumulating data of large batches of input values ​​and metering AD values, component failures and batch hidden dangers occurring in the batch production of smart energy meters can be discovered in a timely manner, which will greatly improve the metering reliability of smart energy meters. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Attached Figure 1 It is a schematic diagram of a measuring parameter detection device of an intelligent electric energy meter of the utility model;

[0020] Attached Figure 2 It is a schematic diagram of a voltage sampling circuit of the utility model;

[0021] Attached Figure 3 It is a schematic diagram of the current sampling circuit of the utility model;

[0022] Among them: 1. Voltage signal generating module; 2. Voltage sampling module; 3. Current sampling module; 4. RS485 communication module; 5. Display module; 6. Resistance; 7. Capacitor; 8. Miniature circuit breaker; 9. Current transformer. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] In this application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the utility model and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0026] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0027] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] Embodiment 1

[0030] Attached Figure 1-3 The utility model is a smart electric energy meter measurement parameter detection device, comprising a voltage signal generating module 1, a voltage sampling module 2, a current sampling module 3, an RS485 communication module 4 and a display module 5;

[0031] The voltage signal generating module 1 is connected to the voltage sampling module 2, the current sampling module 3, the RS485 communication module 4 and the display module 5 respectively in sequence;

[0032] The voltage signal generating module 1 is used to generate a standard 50Hz sinusoidal voltage signal;

[0033] The voltage sampling module 2 is used to collect the voltage value at both ends of the smart energy meter; the voltage sampling module 2 is controlled by a voltage sampling circuit; the voltage sampling circuit includes 7 resistors 6 and 2 capacitors 7, wherein 5 resistors 6 are sequentially connected in series and then connected in series with 1 capacitor 7, and 1 resistor 6 is connected in parallel to one side of the capacitor 7; another capacitor 7 is connected in series with 1 resistor 6 and then connected in parallel with the previous capacitor 7;

[0034] The current sampling module 3 is used to collect the current value at both ends of the smart energy meter; the current sampling module 3 is controlled by a current sampling circuit; the current sampling circuit includes a miniature circuit breaker 8, a current transformer 9 with 4 interfaces, 4 resistors 6 and 2 capacitors 7; the miniature circuit breaker 8 is connected to two interfaces of the current transformer 9; the other two interfaces of the current transformer 9 are respectively connected in series with a resistor 6 and a capacitor 7; two resistors 6 are also connected in parallel between the two interfaces of the current transformer 9; one end of the two capacitors 7 are both grounded;

[0035] The RS485 communication module 4 is used to realize data interaction with the smart electric energy meter and obtain the AD value inside the metering chip;

[0036] The display module 5 is used to display the test process, set the amplitude of the sinusoidal voltage signal and alarm for faults.

[0037] Take an example to illustrate the measurement parameter comparison process:

[0038] For example, in the current sampling circuit, a 1.5A 5mA specification current transformer 9 is used. When the current is 1.5A, the AC signal at the rear end of the current sampling is a small AC signal of 15mV. The device can generate a 15mV 50Hz sinusoidal signal at the corresponding current sampling signal through an interface setting, and then read the internal current AD sampling value of the metering chip through the interface of the smart power meter RS485 communication module 4, and then compare it with the corresponding AD value of the same specification to see if it is within the reliable range. If it exceeds the range, an alarm prompt will be given.

[0039] The present application discloses a smart energy meter metering parameter detection device. Through the design of a voltage signal generating module 1, a voltage sampling module 2, a current sampling module 3, an RS485 communication module 4 and a display module 5, the voltage sampling module 2 collects voltage values, the current sampling module 3 collects current values, the voltage signal generating module 1 generates a standard sinusoidal voltage signal, and then reads the AD value sampled by the metering chip inside the smart meter, and analyzes and compares it with the AD value stored in the same specification meter stored in the MES system in the factory, so as to determine whether the metering circuit is abnormal and whether the metering of each batch is consistent. Through the accumulation of data of large batches of input values ​​and metering AD values, component failures and batch hidden dangers occurring in the batch production of smart energy meters can be discovered in time, which will greatly improve the metering reliability of smart energy meters.

[0040] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A smart electric energy meter measurement parameter detection device, characterized in that: It includes voltage signal generating module, voltage sampling module, current sampling module, RS485 communication module and display module; The voltage signal generating module is connected to the voltage sampling module, the current sampling module, the RS485 communication module and the display module respectively in sequence; The voltage signal generating module is used to generate a standard sinusoidal voltage signal; The voltage sampling module is used to collect the voltage values ​​at both ends of the smart electric energy meter; The current sampling module is used to collect the current values ​​at both ends of the smart electric energy meter; The RS485 communication module is used to realize data interaction with the smart electric energy meter and obtain the AD value inside the metering chip; The display module is used to display the test process, set the amplitude of the sinusoidal voltage signal and alarm for faults.

2. The intelligent electric energy meter measurement parameter detection device according to claim 1, characterized in that: The standard sinusoidal voltage signal generated by the voltage signal generating module is 50 Hz.

3. The intelligent electric energy meter measurement parameter detection device according to claim 1, characterized in that: The voltage sampling module is controlled by a voltage sampling circuit.

4. The intelligent electric energy meter measurement parameter detection device according to claim 3, characterized in that: The voltage sampling circuit includes 7 resistors and 2 capacitors, wherein 5 resistors are connected in series in sequence and then connected in series with 1 capacitor, and 1 resistor is connected in parallel on one side of the capacitor; another capacitor is connected in series with 1 resistor and then connected in parallel with the previous capacitor.

5. The intelligent electric energy meter measurement parameter detection device according to claim 1, characterized in that: The current sampling module is controlled by a current sampling circuit.

6. The intelligent electric energy meter measurement parameter detection device according to claim 5, characterized in that: The current sampling circuit includes a miniature circuit breaker, a current transformer with 4 interfaces, 4 resistors and 2 capacitors; the miniature circuit breaker is connected to two interfaces of the current transformer; the other two interfaces of the current transformer are respectively connected in series with a resistor and a capacitor; two resistors are also connected in parallel between the two interfaces of the current transformer; one end of the two capacitors are grounded.

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