Electric energy meter fault analysis auxiliary device

Abstract

The utility model discloses an electric energy meter fault analysis auxiliary device which comprises a power supply module, the output end of the power supply module is respectively and correspondingly connected with the input ends of a first function module and a second function module, and the input end of the first function module is respectively and correspondingly connected with a plurality of output ends of a device to be tested and a second access module. The output end of the first function module is correspondingly connected with the input end of the to-be-tested device and the input end of the third access module. The auxiliary device is formed based on the power supply module, the function module and the access module, the to-be-tested equipment is embedded into the auxiliary device, and a low-voltage power supply loop and a communication loop are formed among the power supply module, the function module, the access module and the to-be-tested equipment, so that the auxiliary device can communicate with the to-be-tested equipment to realize data acquisition; and the to-be-tested equipment is used for carrying out electric energy metering on the load circuit, so that fault analysis work in the aspects of metering, communication and the like can be carried out on the to-be-tested equipment more intuitively and efficiently, and the fault analysis efficiency of the electric energy meter is improved.

Description

Technical Field

[0001] This utility model relates to the field of testing technology, specifically to an auxiliary device for analyzing electricity meter faults. Background Technology

[0002] In existing electricity meter fault analysis work, the electricity meter fault analysis system is often based on a combination of a voltage regulator, a calibrator, host computer software, and test leads, and is combined with a computer to complete communication functions such as electricity meter data reading.

[0003] Currently, in the analysis of electricity meter faults, the electricity meter circuit board is often connected to the above-mentioned equipment to complete the testing and analysis of different functions of the circuit board. However, due to the large size of the above-mentioned equipment, the required working area is large. At the same time, when the circuit board analysis work requires the use of all the above-mentioned equipment, the connection and disconnection of the test leads is cumbersome and poses significant safety hazards, resulting in low analysis efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an auxiliary device for analyzing electricity meter faults, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides an auxiliary device for fault analysis of electricity meters, comprising a functional module, an access module, and a power supply module, wherein:

[0006] The access module includes a first access module, a second access module, and a third access module. The first access module is used to fix the first connector, the second connector, the third connector, the fourth connector, and the device under test.

[0007] The functional modules include a first functional module and a second functional module. The first functional module includes a control circuit and an RS485 communication circuit. The control circuit is configured with multiple input terminals and multiple output terminals. The multiple input terminals of the control circuit are respectively connected to the third connector, the second access module, and the output terminal of the RS485 communication circuit. The multiple output terminals of the control circuit are respectively connected to the input terminals of the second functional module, the third access module, and the RS485 communication circuit. The input terminals and output terminals of the RS485 communication circuit are connected to the control circuit. The communication serial ports A and B of the RS485 communication circuit are connected to the fourth connector.

[0008] The power module is configured with two output terminals, which are respectively connected to the first functional module and the second functional module, and provide power to the first functional module and the second functional module.

[0009] Furthermore, the output terminal of the second access module is connected to the input terminal of the control circuit to provide control signals to the control circuit, and the input terminal of the third access module is connected to the output terminal of the control circuit to provide digital display information to the device.

[0010] Furthermore, the first access module also includes a first fixing member and a second fixing member arranged symmetrically, both of which are used to fix the device under test to the first access module.

[0011] Furthermore, the power module includes a switch and a power circuit, the switch comprising:

[0012] The first switch has its input terminal connected to a 220V AC power supply, and its output terminal connected to the input terminal of the second switch.

[0013] The second switch has its output terminal connected to the input terminals of the first power supply circuit and the second power supply circuit.

[0014] The third switch is connected in series between the load circuit and the second connector;

[0015] The power supply circuit includes:

[0016] A first power supply circuit, the output terminal of which is used to connect to the first functional module to provide the first functional module with the required stable DC power.

[0017] The second power supply circuit has its output terminal connected to the second functional module to provide the second functional module with the required stable AC power.

[0018] Furthermore, the power module also includes:

[0019] A transformer, one side of which is used to connect to an external power source;

[0020] A rectifier circuit, the input terminal of which is connected to the other side of the transformer;

[0021] An inverter circuit, wherein the input terminal of the inverter circuit is connected to the output terminal of the rectifier circuit;

[0022] A voltage regulator circuit, wherein the input terminal of the voltage regulator circuit is connected to the output terminal of the rectifier circuit.

[0023] Furthermore, the second functional module includes an error reading circuit and a load circuit. The input terminal of the error reading circuit is connected to the output terminal of the second power supply circuit, and the output terminal of the error reading circuit is connected to the first connector. The load circuit is connected in series with the third switch and the second connector.

[0024] Furthermore, the first connector is a power terminal for connecting the error reading circuit and the device under test; the second connector is a load terminal for connecting the load circuit and the device under test; the third connector is a pulse signal terminal for connecting the control circuit and the device under test; and the fourth connector is an RS485 communication terminal for connecting the RS485 communication circuit and the device under test.

[0025] Furthermore, the device also includes a base, which forms a receiving cavity. The power module, the first power circuit, the second power circuit, the first functional module, and the second functional module are disposed in the receiving cavity. A first mounting position is formed on the base for mounting the fifth connector.

[0026] Furthermore, the fifth connector is a rotatable shaft to ensure a reliable connection between the first access module and the base.

[0027] Furthermore, the base surface is also provided with a power indicator light, which is connected to the load circuit.

[0028] Compared with the prior art, the beneficial effects of this utility model are as follows: The auxiliary device of this utility model is an auxiliary device for fault analysis of electricity meters based on a power supply module, a functional module, and an access module. Only the device under test (DUT) needs to be embedded in the auxiliary device, so that the power supply module, functional module, access module, and DUT form a low-voltage power supply circuit and a communication circuit. This allows the auxiliary device to communicate with the DUT to acquire data and to use the DUT to meter the load circuit. If the auxiliary device acquires the data stored in the DUT, it indicates that the communication functions of both the auxiliary device and the DUT are normal, thus completing the communication function test of the DUT. After the test is completed, the subsequent fault analysis stage begins. Compared with fault analysis based on multi-device wiring in a laboratory, this auxiliary device can more intuitively and efficiently perform fault analysis on the DUT in terms of metering and communication, thereby improving the efficiency of electricity meter fault analysis. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram (including front view, left view and top view) of the auxiliary device for fault analysis of electricity meters without the device under test installed, according to an embodiment of this utility model.

[0031] Figure 2 This is a front view of the device under test according to an embodiment of the present utility model.

[0032] Figure 3 This is a schematic diagram (including front view, left view and top view) of an auxiliary device for fault analysis of an energy meter with a device under test installed, according to an embodiment of the present invention.

[0033] Figure 4 for Figure 3 A schematic diagram of the structure of the device under test rotating around a 90° rotation axis (left view).

[0034] Figure 5 for Figure 3 A schematic diagram of the device under test rotated 180° (front view).

[0035] Figure 6 This is a schematic diagram showing the connection relationship between the modules of the power meter fault analysis auxiliary device according to an embodiment of this utility model.

[0036] In the diagram: Base 1, First Access Module 2, First Fixing Component 201, Second Fixing Component 202, Second Access Module 3, Third Access Module 4, Device Under Test 5, First Switch 6, Second Switch 7, Third Switch 8, First Mounting Position 9, First Connector 10, Second Connector 11, Third Connector 12, Fourth Connector 13, Fifth Connector 14, AC 220V Power Supply 15, Left Bayonet 16, Right Bayonet 17, Power Indicator 18. Detailed Implementation

[0037] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0038] In the description of the embodiments of this utility model, it should be understood that if the embodiments of this utility model involve directional indications, such as up, down, left, right, front, back, inside, outside, etc., the orientation or positional relationship of the indications is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the embodiments of this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] In this embodiment of the invention, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part of a structure. They can be mechanical or electrical connections. They can be direct connections or indirect connections through an intermediate medium, and can represent the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0041] like Figures 1-6 As shown, this utility model embodiment provides an auxiliary device for analyzing electricity meter faults, including a functional module, an access module, and a power module. The access module includes a first access module 2, a second access module 3, and a third access module 4. The first access module 2 is used to fix the first connector 10, the second connector 11, the third connector 12, the fourth connector 13, and the device under test 5, and can be rotated 180°. The output terminal of the second access module 3 is connected to the input terminal of the control circuit to provide control signals to the control circuit. The input terminal of the third access module 4 is connected to the output terminal of the control circuit to provide digital display information to the device. The functional module includes a first functional module and a second functional module. The first functional module includes a control circuit and an RS485 communication circuit. The control circuit is configured with multiple input terminals and multiple output terminals. The multiple input terminals of the control circuit are respectively connected to the third connector 12 and the RS485 communication circuit. The output of the RS485 communication circuit is connected to enable pulse signal and RS485 communication between the device and the device under test 5. Simultaneously, the input is connected to the output of the second access module 3. Multiple outputs of the control circuit are respectively connected to the inputs of the second functional module, the third access module 4, and the RS485 communication circuit. If the control circuit can correctly acquire the data stored in the device under test 5, it indicates that the communication functions of both the device under test 5 and the device are normal. Some data will be output to the third access module 4 through the control of the second access module 3. The input and output of the RS485 communication circuit are connected to the control circuit, and the communication serial ports A and B of the RS485 communication circuit are connected to the fourth connector 13. The power module has two outputs, which are respectively connected to the first functional module and the second functional module, and provide power to both modules.

[0042] In this embodiment, as Figures 1-3 As shown, the device under test 5 is an electricity meter. Electricity meters are divided into single-phase smart electricity meters and single-phase carrier electricity meters. The first connector 10 is connected to the first port 501 and the third port 502 of the electricity meter. The second connector 11 is connected to the second port 503 and the fourth port 504 of the electricity meter. The third connector 12 is connected to the ninth port 505 and the tenth port 506 of the electricity meter. The fourth connector 13 is connected to the eleventh port 507 and the twelfth port 508 of the electricity meter.

[0043] In this embodiment, as Figures 1-3 As shown, the first access module 2 also includes a first fixing member 201 and a second fixing member 202 arranged symmetrically. Both the first fixing member 201 and the second fixing member 202 are used to fix the device under test 5 to the first access module 2. The first fixing member 201 is used to fix the left side bayonet 16 of the device under test 5, and the second fixing member 202 is used to fix the right side bayonet 17 of the device under test 5.

[0044] Specifically, by setting up fixing components, the device under test 5 and the first access module 2 are fixedly installed to ensure that the device under test 5 and the first access module 2 can accurately form a power supply and communication loop with the first power supply circuit, the second power supply circuit, the first functional module, and the second functional module, so as to ensure the smooth progress of fault analysis.

[0045] In this embodiment, as Figure 1 and Figure 3 As shown, there is one first fixing member 201 and one second fixing member 202. The first fixing member 201 and the second fixing member 202 can be, but are not limited to, fixing grooves, fixing buckles, springs, etc. Specifically, they can refer to structural members that have both fixing support function and pressing function.

[0046] In this embodiment, as Figure 1 , Figure 3 and Figure 6 As shown, the power module includes switches and power circuits. The switches include a first switch 6, a second switch 7, and a third switch 8. The first switch 6 is an air switch, and its input terminal is connected to the AC 220V power supply 15. The output terminal of the first switch 6 is connected to the input terminal of the second switch 7. The second switch 7 is a power switch, and its output terminal is connected to the input terminals of the first power circuit and the second power circuit. The third switch 8 is an error mode button, connected in series between the load circuit and the second connector 11.

[0047] In this embodiment, as Figure 6As shown, the power supply circuit includes a first power supply circuit and a second power supply circuit. The output terminal of the first power supply circuit is used to connect to the first functional module to provide the first functional module with the required stable DC power supply. The output terminal of the second power supply circuit is used to connect to the second functional module to provide the second functional module with the required stable AC power supply.

[0048] In this embodiment, as Figure 6 As shown, the power module also includes a transformer, a rectifier circuit, an inverter circuit, and a voltage regulator circuit. One side of the transformer is used to connect to an external power source. The input terminal of the rectifier circuit is connected to the other side of the transformer. The input terminal of the inverter circuit is connected to the output terminal of the rectifier circuit. The input terminal of the voltage regulator circuit is connected to the output terminal of the rectifier circuit.

[0049] In this embodiment, as Figures 1-3 As shown, the first connector 10 is a power terminal for connecting the error reading circuit and the device under test 5; the second connector 11 is a load terminal for connecting the load circuit and the device under test 5; the third connector 12 is a pulse signal terminal for connecting the control circuit and the device under test 5; and the fourth connector 13 is an RS485 communication terminal for connecting the RS485 communication circuit and the device under test 5.

[0050] In this embodiment, as Figure 6 As shown, the second functional module includes an error reading circuit and a load circuit. The input terminal of the error reading circuit is connected to the output terminal of the second power supply circuit, and the output terminal of the error reading circuit is connected to the first connector 10. The load circuit is connected in series with the third switch 8 and the second connector 11.

[0051] In this embodiment, as Figure 1 and Figure 3 As shown, the device also includes a base 1, which forms a receiving cavity. The power module, the first power circuit, the second power circuit, the first functional module, and the second functional module are disposed in the receiving cavity. A first mounting position 9 is formed on the base 1 for detachably mounting the fifth connector 14, so that the device under test 5 can be detachably connected to the multiple output terminals and input terminals of the power module, the first functional module, and the second functional module disposed on the base 1.

[0052] Specifically, the design of the first installation position 9 takes into account the differences between different types of devices under test 5. Different types of devices under test 5 require different first access modules 2, such as single-phase energy meters and three-phase energy meters. A detachable design is adopted to leave room for subsequent improvements and upgrades to the device.

[0053] In this embodiment, as Figure 4 As shown, the fifth connector 14 is a 90° rotating shaft to reliably connect the first access module 2 to the base 1, facilitating the analysis of electricity meter faults.

[0054] In this embodiment, as Figure 1 and Figure 3 As shown, the second access module 3 is a display, and the third access module 4 is a numeric keypad. Both the display and the numeric keypad are mounted on the surface of the base 1.

[0055] In this embodiment, as Figure 1 and Figure 3 As shown, a power indicator light 18 is also provided on the surface of the base 1, and the power indicator light 18 is connected to the load circuit.

[0056] Specifically, the power indicator light 18 is set to show the status of the device under test being supplied with 220V AC power. When 220V AC power is supplied, the power indicator light 18 is turned on, and when no power is supplied, the power indicator light 18 is turned off.

[0057] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electric energy meter failure analysis assistance device characterized by comprising: It comprises an access module, a function module and a power module, wherein: The access module comprises a first access module (2), a second access module (3) and a third access module (4), the first access module (2) is used for fixing a first connecting piece (10), a second connecting piece (11), a third connecting piece (12), a fourth connecting piece (13) and a device to be tested (5); The function module comprises a first function module and a second function module, the first function module comprises a control circuit and an RS485 communication circuit, the control circuit is configured with a plurality of input ends and a plurality of output ends, the plurality of input ends of the control circuit are connected with the output end of the RS485 communication circuit, the third connecting piece (12) and the second access module (3) correspondingly, the plurality of output ends of the control circuit are connected with the input end of the RS485 communication circuit, the second function module and the third access module (4) correspondingly, the input end and the output end of the RS485 communication circuit are connected with the control circuit, the communication serial ports A and B of the RS485 communication circuit are connected with the fourth connecting piece (13); The power module is configured with two output ends, and the two output ends are connected with the first function module and the second function module correspondingly, and the first function module and the second function module are provided with power supply.

2. The power meter fault analysis auxiliary device according to claim 1, characterized in that, The output end of the second access module (3) is connected with the input end of the control circuit to provide a control signal for the control circuit, and the input end of the third access module (4) is connected with the output end of the control circuit to provide digital display information for the device.

3. The power meter fault analysis auxiliary device according to claim 1, characterized in that, The first access module (2) further comprises symmetrically arranged first and second fixing pieces (201) and (202), and the first and second fixing pieces (201) and (202) are used for fixing the device to be tested (5) to the first access module (2).

4. The power meter fault analysis auxiliary device according to claim 1, characterized in that, The power module comprises a switch and a power circuit, and the switch comprises: A first switch (6), the input end of the first switch (6) is connected with an AC 220V power supply (15), and the output end of the first switch (6) is connected with the input end of a second switch (7); The second switch (7), the input end of the second switch (7) is connected with the output end of the first switch (6), and the output end of the second switch (7) is connected with the input end of a first power circuit and a second power circuit; A third switch (8), the third switch (8) is connected in series between a load circuit and the second connecting piece (11); The power circuit comprises: A first power circuit, the output end of the first power circuit is used for accessing the first function module to provide a required stable DC power supply for the first function module; A second power circuit, the output end of the second power circuit is used for accessing the second function module to provide a required stable AC power supply for the second function module.

5. The power meter fault analysis auxiliary device according to claim 1, characterized in that, The power module further comprises: A transformer, one side of the transformer is used for accessing an external power supply; A rectifier circuit, the input end of the rectifier circuit is connected with the other side of the transformer; An inverter circuit, the input end of the inverter circuit is connected with the output end of the rectifier circuit; A voltage stabilizing circuit, an input end of which is connected with an output end of the rectifying circuit.

6. The power meter fault analysis auxiliary device according to claim 4, characterized in that, The second functional module comprises an error reading circuit and a load circuit, an input end of the error reading circuit is connected with an output end of the second power supply circuit, an output end of the error reading circuit is connected with the first connecting piece (10), and the load circuit is connected with the third switch (8) and the second connecting piece (11) in series.

7. The power meter fault analysis auxiliary device according to claim 6, characterized in that, The first connecting piece (10) is a power supply terminal post, used for connecting the error reading circuit and the equipment to be tested (5); the second connecting piece (11) is a load terminal post, used for connecting the load circuit and the equipment to be tested (5); the third connecting piece (12) is a pulse signal terminal post, used for connecting the control circuit and the equipment to be tested (5); and the fourth connecting piece (13) is an RS485 communication terminal post, used for connecting the RS485 communication circuit and the equipment to be tested (5).

8. The power meter fault analysis auxiliary device according to claim 6, characterized in that, The base (1) is further provided with a first mounting position (9) for mounting the fifth connecting piece (14), and a power supply indicating lamp (18) is further arranged on the surface of the base (1) and connected with the load circuit.

9. The power meter fault analysis assistance device according to claim 8, characterized by, The fifth connecting piece (14) is a rotatable shaft, so that the first access module (2) and the base (1) are reliably connected.

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