Device and method for measuring voltage ripples

Abstract

The invention discloses a voltage ripple measuring device and method. The device comprises at least one wiring terminal and an oscilloscope probe. One end of the wiring terminal is connected with one end of a group of wire rods with target lengths, and the other end of each wire rod is welded at a to-be-measured position of a to-be-measured printed circuit board; the oscilloscope probe is connected with an oscilloscope, a probe hook of the oscilloscope probe is removed, and the oscilloscope probe is sleeved with a grounding spring; a contact of the oscilloscope probe and a contact of the grounding spring are connected with the other end of the wiring terminal. According to the invention, the grounding spring does not need to be pressed by a hand or wound by an adhesive tape in the measurement process, thereby avoiding the tedious operation that a conventional grounding spring needs to be pressed by a hand or fixed by an adhesive tape in the measurement process, enabling the operation to be simpler and more convenient, reducing the measurement error caused by the instability and jittering of the hand, and improving the measurement precision. The time of repeated adjustment and verification of operators is reduced, and the overall efficiency of measurement is improved.

Description

Technical Field

[0001] The present application relates to the field of integrated circuit technology, and in particular to a device and method for measuring voltage ripple. Background Art

[0002] Voltage ripple refers to the AC component of the output DC voltage, which is usually caused by power supply instability, load fluctuation or circuit design defects. This ripple reflects the fluctuation of the output voltage and is usually expressed as peak-to-peak or effective value.

[0003] Voltage ripple not only affects the performance of the power supply system, but also brings unexpected harmonics, thereby interfering with the logical relationship of the digital circuit and affecting the normal operation of the system. Therefore, the measurement of voltage ripple becomes very important. Only accurate measurement can provide support and direction for subsequent rectification; the measurement of voltage ripple is of great significance for optimizing circuit design and improving power supply stability.

[0004] At present, the grounding spring method is commonly used to measure voltage ripple. However, the inventors have realized that the grounding spring method of measuring ripple has relatively large defects: after finding a suitable grounding point, the grounding spring needs to be pressed by hand or wrapped with tape during the measurement process, which is inconvenient to operate in many cases, especially in an environment with small space or complex equipment; and the operator's hand must not shake during the measurement process, which will cause inaccurate measurement, burrs, no data, data errors and other prominent problems. Therefore, the measurement operation needs to be repeatedly adjusted and verified, resulting in inefficient testing process.

[0005] The measurement of voltage ripple needs to be tested in various scenarios. If the machine is installed as a complete machine with a small internal space, or if the machine is undergoing stress testing in an aging box, it will become very difficult to achieve using conventional measurement methods. Summary of the invention

[0006] The present application provides a voltage ripple measurement device and method, aiming to solve the technical problems of inconvenient operation and low efficiency of existing voltage ripple measurement.

[0007] In a first aspect, a voltage ripple measuring device comprises:

[0008] At least one wiring terminal, one end of which is connected to one end of a set of wires of target length, and the other end of which is welded to a position to be measured on the printed circuit board to be measured;

[0009] An oscilloscope probe is connected to an oscilloscope, the probe hook of the oscilloscope probe is removed, and a grounding spring is sleeved on the oscilloscope probe; the contact of the oscilloscope probe and the contact of the grounding spring are connected to the other end of the wiring terminal.

[0010] In the above solution, optionally, the target length of the wire is 1 cm.

[0011] In the above solution, optionally, the other end of the wire is stripped and tinned during welding.

[0012] In the above solution, optionally, the oscilloscope probe is fixed on the printed circuit board to be measured by acetate tape.

[0013] In the above solution, further optionally, the voltage ripple measuring device and the printed circuit board to be measured are packaged into a complete unit.

[0014] In the above solution, optionally, the positions to be measured are two ends of a capacitor.

[0015] In the above solution, optionally, the wiring terminal is a 2P / 2.54mm terminal.

[0016] In a second aspect, a method for measuring voltage ripple includes:

[0017] Connect one end of the terminal block to one end of a set of wires, and cut the length of the wires to a target length;

[0018] Welding the other end of the wire to a position to be measured on the printed circuit board to be measured;

[0019] The probe hook of the oscilloscope probe connected to the oscilloscope is removed, and a grounding spring is sleeved on the oscilloscope probe;

[0020] Inserting the contact of the oscilloscope probe and the contact of the ground spring into the other end of the wiring terminal;

[0021] Operate the oscilloscope panel to measure voltage ripple.

[0022] Compared with the prior art, this application has at least the following beneficial effects:

[0023] In the voltage ripple measuring device provided in the embodiment of the present application, since a wiring terminal and a wire are additionally provided, and the wire is welded to the measured position of the printed circuit board to be measured, during the process of measuring the voltage ripple, the voltage ripple can be measured by inserting the oscilloscope probe into the wiring terminal. During the measurement process, there is no need to hold down the grounding spring by hand or wrap the grounding spring with tape, which avoids the cumbersome operation of holding down the traditional grounding spring by hand or fixing it with tape during the measurement process. The operation is simpler and can reduce the measurement error caused by unstable hands and shaking, thereby improving the stability of the operation. It can ensure that the oscilloscope probe is in more stable contact with the measurement position during the measurement process, and can effectively reduce the fluctuation caused by the operator's hand shaking, thereby improving the measurement accuracy. In addition, the simplified operation process reduces the time required for the operator to repeatedly adjust and calibrate, thereby improving the overall efficiency of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a voltage ripple measurement device provided in one embodiment of the present application;

[0025] Figure 2 A schematic diagram of a flow chart of a voltage ripple measurement method provided in one embodiment of the present application;

[0026] Figure 3 This is a schematic diagram of a wiring terminal and a wire in one embodiment of the present application;

[0027] Figure 4 A schematic diagram of a terminal block and wire cutting in one embodiment of the present application;

[0028] Figure 5 This is a schematic diagram of a wire being welded to a printed circuit board to be measured in one embodiment of the present application;

[0029] Figure 6 This is a schematic diagram of an oscilloscope probe in one embodiment of the present application.

[0030] Description of reference numerals:

[0031] 1. Terminal block; 2. Wire; 3. Printed circuit board to be measured; 4. Oscilloscope probe; 5. Ground spring. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0033] In the description of the present application: unless otherwise specified, expressions such as “include”, “comprising”, “having”, etc. also mean “not limited to” (certain units, components, materials, steps, etc.).

[0034] In one embodiment, Figure 1 As shown, a voltage ripple measuring device is provided, which includes:

[0035] At least one wiring terminal 1, one end of the wiring terminal 1 is connected to one end of a set of wires 2 of target length, and the other end of the wires 2 is welded to a position to be measured on a printed circuit board (PCB) 3 to be measured;

[0036] An oscilloscope probe 4 is connected to the oscilloscope, the probe hook of the oscilloscope probe 4 is removed, and a grounding spring 5 is sleeved on the oscilloscope probe 4; the contact of the oscilloscope probe 4 and the contact of the grounding spring 5 are connected to the other end of the wiring terminal 1.

[0037] Furthermore, the target length of the wire 2 is theoretically as short as possible. Considering the difficulty of actual operation, about 1 cm is optimal. When welding, the end of the wire 2 to be welded is peeled and tinned.

[0038] Furthermore, the two ends of the capacitor are generally the best locations to be measured, and the wires 2 are welded to the two ends of the capacitor. If multiple sets of voltage ripples need to be measured, multiple sets of wires 2 need to be prepared, and the wires 2 are welded in the same way after the locations to be measured are found.

[0039] Furthermore, the oscilloscope probe 4 can also be fixed to the printed circuit board 3 to be measured by acetate tape, and the voltage ripple measurement device and the printed circuit board 3 to be measured can be packaged into a complete machine for aging operation, etc., without having to hold the oscilloscope probe 4 and the grounding spring 5 by hand.

[0040] In the voltage ripple measuring device provided in the embodiment of the present application, since wiring terminals and wires are additionally provided, and the wires are welded to the measured position of the printed circuit board to be measured, during the process of measuring the voltage ripple, the voltage ripple can be measured by inserting the oscilloscope probe into the wiring terminal. During the measurement process, there is no need to hold down the grounding spring by hand or wrap the grounding spring with tape, which avoids the cumbersome operation of holding down the traditional grounding spring by hand or fixing it with tape during the measurement process. The operation is simpler and can reduce the measurement error caused by unstable hands and shaking, thereby improving the stability of the operation.

[0041] It can ensure that the oscilloscope probe is in more stable contact with the measurement position during the measurement process, which can effectively reduce the fluctuation caused by the operator's hand shaking, thereby improving the measurement accuracy. Through the stable structural design, the physical interference introduced during the hand-held probe is reduced, making the measurement results more stable, especially when performing dynamic tests.

[0042] The automation and simplification of the operation process reduces the time that operators need to repeatedly adjust and calibrate, and improves the overall efficiency of the measurement. By reducing the steps of manual operation, the measurement can be completed quickly, which can significantly improve the measurement efficiency, especially in scenarios that require frequent testing.

[0043] The device design provided in the embodiment of the present application allows for measurement in a small space, and is particularly suitable for whole machine assembly or working in a confined environment such as an aging box. Since the wiring terminals are directly connected to the printed circuit board, the demand for space is reduced, making the measurement process more convenient. By connecting the grounding spring and the contacts of the oscilloscope probe to the wiring terminals, the stability of signal transmission can be ensured, thereby reducing burrs and data errors caused by poor contact. This design can effectively improve the reliability of the measurement results.

[0044] The device provided in the embodiment of the present application can solve the jitter problem in the process of measuring voltage ripple of the grounding spring and the problem that the test cannot be carried out smoothly in various inconvenient measurement scenarios. The device provided in the embodiment of the present application is simple, convenient and stable to operate, and can greatly improve the measurement efficiency in the electrical performance test of integrated circuits.

[0045] In one embodiment, Figure 2 As shown, a method for measuring voltage ripple is provided, comprising the following steps:

[0046] S1, connect one end of the terminal block 1 to one end of a set of wires 2, and cut the length of the wires 2 to a target length.

[0047] like Figure 3 As shown, an electronic wire connected to a terminal 1 is prepared according to the location where the voltage ripple of a printed circuit board (hereinafter referred to as PCB) needs to be measured. The terminal 1 takes 2P / 2.54mm as an example. Figure 4 As shown, the electronic wire is then cut. When cutting, the reserved length of wire 2 is theoretically as short as possible. Considering the difficulty of actual operation, about 1 cm is the best. Then, the port is peeled and tinned.

[0048] S2, welding the other end of the wire 2 to a position to be measured on the printed circuit board 3 to be measured.

[0049] like Figure 5As shown, find the position on the PCB board where the voltage ripple needs to be measured. Generally, the two ends of the capacitor are the best. Solder the wire 2 prepared above to the two ends of the capacitor. If there are multiple sets of voltage ripples that need to be measured, you need to prepare multiple sets of wires 2. After finding the position to be measured, solder them in the same way.

[0050] S3, removing the probe hook of the oscilloscope probe 4 connected to the oscilloscope, and sleeve a grounding spring 5 on the oscilloscope probe 4.

[0051] like Figure 6 As shown, remove the oscilloscope hook from the oscilloscope probe 4 and put on the grounding spring 5.

[0052] S4, insert the contact of the oscilloscope probe 4 and the contact of the ground spring 5 into the other end of the terminal 1.

[0053] S5, operate the oscilloscope panel to measure the voltage ripple.

[0054] like Figure 1 As shown, the metal contacts of the probe and the ground spring contacts are respectively inserted into the 2P / 2.54mm electronic wire soldered on the PCB board to perform the test. The remaining operations are the same as conventional measurements, and only the oscilloscope panel and the integrated circuit need to be operated.

[0055] In summary, in brief, the method provided in the embodiment of the present application includes the following steps:

[0056] (1) Figure 3 As shown, prepare wire 2;

[0057] (2) Figure 4 As shown, wire 2 is cut, peeled and tinned;

[0058] (3) Figure 5 As shown, the prepared wire 2 is welded to the capacitor to be measured;

[0059] (4) Figure 6 As shown, prepare the probe and ground spring 5;

[0060] (5) Figure 1 Just insert the probe and spring as shown.

[0061] It should be understood that although Figure 2 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 2At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0062] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A voltage ripple measuring device, characterized in that: include: At least one wiring terminal, one end of which is connected to one end of a set of wires of target length, and the other end of which is welded to a position to be measured on the printed circuit board to be measured; An oscilloscope probe is connected to an oscilloscope, the probe hook of the oscilloscope probe is removed, and a grounding spring is sleeved on the oscilloscope probe; the contact of the oscilloscope probe and the contact of the grounding spring are connected to the other end of the wiring terminal.

2. The voltage ripple measuring device according to claim 1, characterized in that: The target length of the wire was 1 cm.

3. The voltage ripple measuring device according to claim 1, characterized in that: The other end of the wire is stripped and tinned during soldering.

4. The voltage ripple measuring device according to claim 1, characterized in that: The oscilloscope probe is fixed on the printed circuit board to be measured by acetate tape.

5. The voltage ripple measuring device according to claim 4, characterized in that: The voltage ripple measuring device and the printed circuit board to be measured are packaged into a complete unit.

6. The voltage ripple measuring device according to claim 1, characterized in that: The positions to be measured are two ends of the capacitor.

7. The voltage ripple measuring device according to claim 1, characterized in that: The connection terminal is a 2P / 2.54mm terminal.

8. A method for measuring voltage ripple, characterized in that: include: Connect one end of the terminal block to one end of a set of wires, and cut the length of the wires to a target length; Welding the other end of the wire to a position to be measured on the printed circuit board to be measured; The probe hook of the oscilloscope probe connected to the oscilloscope is removed, and a grounding spring is sleeved on the oscilloscope probe; Inserting the contact of the oscilloscope probe and the contact of the ground spring into the other end of the wiring terminal; Operate the oscilloscope panel to measure voltage ripple.

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