A device for measuring the ripple of weak current interface power supply of electric energy meter communication module

Abstract

The present invention relates to a power ripple measurement device for a weak-current interface of an electric energy meter communication module, comprising a load connection plate and a negative contact plate, both of which are PCB boards. The load connection plate has a plurality of first pins extending toward one side thereof, and the pins are used to insert into the weak-current interface of the electric energy meter communication module; at least one load resistor is arranged on the other side of the load connection plate, and a positive power supply measurement point is provided on the other side of the load connection plate, and a negative contact plate is also arranged on the other side of the load connection plate, and the negative contact plate is connected to the load connection plate through a plurality of second pins, and both sides of the negative contact plate are covered with a copper layer, and a through soldering pad is provided on the negative contact plate, and a center hole is provided on the soldering pad, and the soldering pad is arranged opposite to the positive power supply measurement point. The present invention can measure the power ripple of the weak-current interface of the intelligent electric energy meter communication module faster and more accurately.

Description

Technical Field

[0001] The present application relates to the technical field of electric energy meters, and in particular to a device for measuring the ripple of a weak current interface power supply of an electric energy meter communication module. Background Art

[0002] At present, with the widespread application of smart energy meters, various communication modules have gradually occupied the smart energy meter communication market, thus putting forward higher load and ripple requirements for the power interface of the energy meter communication module. The ripple of the weak current interface power supply of the energy meter communication module directly affects the communication effect of the communication module, so the State Grid and China Southern Power Grid Company have put forward the requirement that the output ripple of the power interface of the communication module is less than or equal to one thousandth. In order to verify whether the ripple of the weak current interface power supply of the smart energy meter communication module meets the requirements, measuring the ripple of the weak current interface power supply of the energy meter communication module has become a necessary process in the design of the energy meter.

[0003] The commonly used ripple measurement device is to connect the load resistor in series between the positive and negative poles of the weak current interface power supply of the smart energy meter communication module, and then use the oscilloscope probe and ground spring to measure the ripple. It is not easy to reliably contact the measurement point when using this measurement device to measure the output ripple of the power interface of the energy meter communication module. As a result, the measurement personnel must spend a lot of time adjusting the oscilloscope probe to stably and reliably contact the measurement point. The slight jitter or movement of the oscilloscope probe will affect the measurement results. Summary of the invention

[0004] The present application provides a device for measuring the power ripple of a weak current interface of an electric energy meter communication module, so as to solve the problem that the power interface ripple measurement of the smart electric energy meter communication module is greatly disturbed and time-consuming due to the measurement device and personnel operation.

[0005] The technical solutions adopted in this application are as follows:

[0006] The present application provides a ripple measurement device for a weak current interface power supply of an electric energy meter communication module, comprising a load connection plate and a negative contact plate, wherein both the load connection plate and the negative contact plate are PCB boards;

[0007] The load connection plate has a plurality of first pins extending toward one side thereof, and the first pins are used to be inserted into the weak current interface of the electric energy meter communication module;

[0008] At least one load resistor is arranged on the other side of the load connection plate, and a positive power supply measurement point is arranged on the other side of the load connection plate.

[0009] A negative contact plate is also provided on the other side of the load connection plate, and the negative contact plate is connected to the load connection plate through a plurality of second pins. Both sides of the negative contact plate are covered with a copper layer, and the negative contact plate has a penetrating welding pad, which has a center hole and is arranged opposite to the positive electrode measurement point of the power supply.

[0010] There are three load resistors, which are concretely cement resistors.

[0011] Furthermore, the rated power of the cement resistor is 5-15W.

[0012] Furthermore, the first pins have two rows, and each row has six pins.

[0013] Furthermore, it also includes a housing upper cover and a housing lower cover,

[0014] The upper cover of the shell and the lower cover of the shell are arranged together to form a cavity inside. The load connecting plate is located in the cavity. The upper cover of the shell has a first through hole, and the load contact plate extends out of the first through hole. The lower cover of the shell has a second through hole, and the first pin extends out of the second through hole.

[0015] The beneficial effects of adopting the technical solution of this application are as follows:

[0016] The present invention provides a power ripple measurement device for the weak current interface of an electric energy meter communication module. The probe of an oscilloscope is inserted into the central hole of a negative contact plate and the input end is in contact with a positive measurement point of the power supply. The negative pole of the probe of the oscilloscope is in contact with a pad on the negative contact plate, thereby forming a power supply loop; and the test data of the power ripple is obtained from the oscilloscope.

[0017] The present invention designs and manufactures a ripple measurement device that can be directly inserted into the weak current interface of the smart electric energy meter communication module, and effectively reduces the difficulty of ripple measurement by using PCB routing, copper coating, pads, etc., so that the ripple of the weak current interface power supply of the smart electric energy meter communication module can be measured faster and more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 An exploded diagram of a device for measuring the ripple of a weak current interface power supply of an electric energy meter communication module;

[0020] Figure 2 This is a front view of a power supply ripple measurement device for a weak current interface of an electric energy meter communication module after installation;

[0021] Figure 3 It is a side view of a weak current interface power supply ripple measurement device of an electric energy meter communication module after installation;

[0022] Figure 4 This is a rear view of a weak current interface power supply ripple measurement device of an electric energy meter communication module after installation;

[0023] Figure 5 A top view of a weak current interface power supply ripple measurement device for an electric energy meter communication module after installation;

[0024] Illustration Description:

[0025] Among them, 1-load connection plate; 11-negative contact plate; 12-first pin; 13-second pin; 14-load resistor welding position; 15-welding pad;

[0026] 2-housing lower cover; 21-second via hole;

[0027] 3-shell upper cover; 31-first via hole. DETAILED DESCRIPTION

[0028] The following embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following embodiments do not represent all implementations consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application as detailed in the claims.

[0029] See also Figures 1 to 5 .

[0030] The present application provides a device for measuring the ripple of a weak-current interface power supply of an electric energy meter communication module, comprising a load connection plate 1 and a negative contact plate, wherein both the load connection plate 1 and the negative contact plate are PCB boards.

[0031] Specifically:

[0032] like Figure 1 As shown, the load connection plate 1 has a plurality of first pins 12 extending downward from the upper side through the lower side, and the first pins 12 are used to be inserted into the weak current interface of the electric energy meter communication module;

[0033] At least one load resistor is arranged on the upper surface of the load connection board 1, and a positive power supply measurement point is arranged on the other surface of the load connection board 1.

[0034] A negative contact plate 11 is also provided on the top of the load connection plate 1. The negative contact plate 11 is connected to the load connection plate 1 through a plurality of second pins 13. The upper and lower surfaces of the negative contact plate are covered with a copper layer. The negative contact plate 11 has a penetrating pad 15, which has a center hole and is arranged opposite to the positive measurement point of the power supply.

[0035] like Figure 1 As shown, six load resistor welding positions 14 are arranged on the other side of the load connection plate 1. When in use, a load resistor is welded on every two load resistor welding positions 14, and there are three load resistors in total. Specifically, the load resistor is a cement resistor.

[0036] The rated power of the cement resistor is 5-15W. Specifically, the rated power of the cement resistor in this embodiment is 10W.

[0037] The first pins 12 have two rows, each row having six pins.

[0038] like Figure 1 As shown, the first pin 12 , the negative contact plate 11 and the load resistor are arranged in sequence from the upper end to the lower end of the load connecting plate 1 .

[0039] The housing also includes an upper cover 3 and a lower cover 2, which are covered together to form a cavity inside. The load connecting plate 1 is located in the cavity. The upper cover 3 has a first through hole 31, and the load contact plate 11 extends out of the first through hole 31. The lower cover 2 has a second through hole 21, and the first pin 12 extends out of the second through hole 21.

[0040] When this embodiment works:

[0041] Insert the probe of the oscilloscope into the center hole of the negative contact plate and make the input end (i.e., the positive pole) contact the positive measurement point of the power supply. The negative pole of the oscilloscope probe contacts the pad on the negative contact plate 11, thereby forming a power supply loop; obtain the test data of the power supply ripple from the oscilloscope.

[0042] The present embodiment is a ripple measurement device for the weak-current interface power supply of an electric energy meter communication module. The ripple measurement device is designed and manufactured to be directly inserted into the weak-current interface of the smart electric energy meter communication module. The difficulty of ripple measurement is effectively reduced by using PCB routing, copper coating, and pads, so that the ripple of the weak-current interface power supply of the smart electric energy meter communication module can be measured faster and more accurately.

[0043] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the general concept of this application and do not constitute a limitation on the protection scope of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without creative work belong to the protection scope of this application.

Claims

1. A device for measuring the ripple of the weak current interface power supply of an electric energy meter communication module, characterized in that: It includes a load connection plate and a negative electrode contact plate, and both the load connection plate and the negative electrode contact plate are PCB boards; The load connection plate has a plurality of first pins extending toward one side thereof, and the first pins are used to be inserted into the weak current interface of the electric energy meter communication module; At least one load resistor is arranged on the other side of the load connection plate, and a positive power supply measurement point is arranged on the other side of the load connection plate. A negative contact plate is also provided on the other side of the load connection plate, the negative contact plate is connected to the load connection plate through a plurality of second pins, both sides of the negative contact plate are covered with a copper layer, the negative contact plate has a through pad, the pad has a center hole, and is arranged opposite to the positive electrode measurement point of the power supply; The probe of the oscilloscope is inserted into the center hole, the input end of the oscilloscope contacts the positive measuring point of the power supply, and the negative pole of the probe of the oscilloscope contacts the pad on the negative contact plate, thereby forming a power supply loop, and the test data of the power supply ripple is obtained through the oscilloscope.

2. The device for measuring the ripple of the weak current interface power supply of the electric energy meter communication module according to claim 1, characterized in that: There are three load resistors, which are concretely cement resistors.

3. The device for measuring the ripple of the weak current interface power supply of the electric energy meter communication module according to claim 2, characterized in that: The rated power of the cement resistor is 5~15w.

4. The device for measuring the ripple of the weak current interface power supply of the electric energy meter communication module according to any one of claims 1 to 3, characterized in that: The first pins have two rows, each row having six pins.

5. The device for measuring the ripple of the weak current interface power supply of the electric energy meter communication module according to claim 4, characterized in that: It also includes a housing upper cover and a housing lower cover, The upper cover and the lower cover of the shell are arranged together to form a cavity inside, and the load connecting plate is located in the cavity. The upper cover of the shell has a first through hole, and the negative contact plate extends out of the first through hole. The lower cover of the shell has a second through hole, and the first pin extends out of the second through hole.

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