Direct-current power supply ripple testing device

Abstract

The utility model relates to the technical field of ripple testing, and discloses a direct current power supply ripple testing device, which comprises an oscilloscope, a connecting wire and an adjusting part, the connecting wire comprises a joint, a lead, a probe, a probe and a grounding ring, the joint is connected with the output end of the oscilloscope, the joint is fixedly connected with the lead, and the other end of the lead is fixedly connected with the probe. The grounding ring is composed of a lantern ring, a connecting rod and a grounding pin, the lantern ring fixedly sleeves the probe, one end of the connecting rod is fixedly connected with the lantern ring, the other end of the connecting rod is fixedly connected with the grounding pin, and the adjusting part is used for adjusting the distance between the grounding pin and the probe. By rotating the rotating sleeve, the connecting ring, the driving plate, the mounting plate, the rotating shaft and the compression roller can be driven to move, so that the grounding pin is extruded, the distance between the grounding pin and the probe is adjusted, the probe is in contact with the positive electrode of a power capacitor, the grounding pin is in contact with the negative electrode of the power capacitor, the contact is good and stable, and the accuracy of a test result is improved.

Description

Technical Field

[0001] The utility model relates to the field of ripple testing, and more specifically, to a direct current power supply ripple testing device. Background Art

[0002] Ripple refers to the periodic or random noise signal contained in the power supply. If the ripple of the power supply is high, it may affect the stability of the chip or system. Therefore, the power supply needs to be tested for ripple.

[0003] When a DC power supply is tested for ripple, the test point for measuring the power supply ripple is generally selected after the power supply passes through the filter capacitor. The oscilloscope ground ring needs to touch the negative pole of the power supply capacitor, and the oscilloscope probe needs to touch the positive pole of the power supply capacitor. When the existing oscilloscope is tested, after the ground ring touches the negative pole of the power supply capacitor, the probe is pressed to deform the ground ring so that the probe can touch the positive pole of the power supply capacitor. However, this method has certain defects. After manual pressing, the ground ring and the negative pole of the power supply capacitor are prone to poor contact, resulting in inaccurate test results. Utility Model Content

[0004] The utility model provides a DC power supply ripple test device, which solves the technical problem in the related art that after the probe is manually pressed to make the probe contact the positive electrode of the power supply capacitor, the grounding ring and the negative electrode of the power supply capacitor are easily in poor contact, resulting in inaccurate test results.

[0005] According to one aspect of the utility model, a DC power supply ripple test device is provided, including an oscilloscope, a wiring and an adjustment part, the wiring including a connector, a wire, a probe, a probe and a grounding ring, the connector is connected to the output end of the oscilloscope, the connector is fixedly connected to the wire, the other end of the wire is fixedly connected to the probe, the end of the probe away from the wire has the probe, the grounding ring is made of a metal conductor material, the grounding ring consists of a sleeve, a connecting rod and a grounding pin, the sleeve is fixedly sleeved on the probe, one end of the connecting rod is fixedly connected to the sleeve, the other end of the connecting rod is fixedly connected to the grounding pin, and the adjustment part is used to adjust the distance between the grounding pin and the probe, so that the probe contacts the positive pole of the power supply capacitor and the grounding pin contacts the negative pole of the power supply capacitor.

[0006] Furthermore, the grounding needle is an elastic metal sheet, and the driving adjustment part can cause the metal sheet to deform, thereby changing the distance between the grounding needle and the probe.

[0007] Furthermore, the adjustment part includes a driving plate, a mounting plate is fixedly connected to the driving plate on one side close to the grounding pin, an adjusting part is fixedly connected to the mounting plate, the adjusting part contacts the grounding pin, and the movement of the driving plate drives the mounting plate and the adjusting part to move synchronously. The movement of the adjusting part squeezes the grounding pin, causing the grounding pin to deform.

[0008] Furthermore, the grounding needle gradually approaches the probe head along the length direction of the probe, and in the process that the adjusting member moves toward the probe root along the length direction of the probe, the movable end of the grounding needle gradually moves toward the probe.

[0009] Furthermore, the adjusting member is composed of a rotating shaft and a roller. The rotating shaft is fixedly connected to the mounting plate. The roller is rotatably sleeved on the outer ring of the rotating shaft. The outer ring of the pressure roller contacts the grounding pin to reduce the wear between the adjusting member and the grounding pin.

[0010] Furthermore, the middle outer ring of the probe has a thread, and a rotating sleeve is threadedly sleeved on the middle outer ring of the probe. The outer ring of the rotating sleeve is provided with an annular mounting groove, and a connecting ring rotatably sleeved with the rotating sleeve is provided in the mounting groove. The connecting ring is fixedly connected to the driving plate, and the rotating sleeve is rotated, and the rotating sleeve moves spirally along the length direction of the probe, thereby driving the connecting ring and the driving plate to move synchronously.

[0011] Furthermore, a limit plate fixedly connected to the probe is provided on the side of the rotating sleeve close to the grounding needle, the limit plate passes through the limit slot, the direction of the limit slot is consistent with the length direction of the probe, the inner wall of the limit slot is fitted with the side of the driving plate, and the limit slot limits the position of the driving plate so that the limit plate can only move along the length direction of the probe to prevent the driving plate from deflecting and causing the roller to separate from the grounding needle.

[0012] Furthermore, the adjustment parts are all made of insulating materials to avoid affecting the ground pin and thus affecting the test results.

[0013] Furthermore, the conductor is a shielded cable to reduce interference from other signals on the line and improve the accuracy of the test result.

[0014] Furthermore, the outer ring of the probe is made of insulating material to prevent some interference signals from being mixed onto the probe through the hand, thereby increasing the measurement ripple.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model is provided with an adjustment part. By rotating the rotating sleeve, the connecting ring, the driving plate, the mounting plate, the rotating shaft and the pressure roller can be driven to move, thereby squeezing the grounding pin and adjusting the distance between the grounding pin and the probe, so that the probe contacts the positive electrode of the power capacitor and the grounding pin contacts the negative electrode of the power capacitor. The contact is good and stable, thereby improving the accuracy of the test result.

[0017] 2. In the utility model, the adjustment part and the outer ring of the probe are both made of insulating materials, and the wires are shielded cables, which greatly reduces the interference of other external signals on the test and makes the test results more accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a DC power supply ripple test device provided by the utility model;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of wiring in a DC power supply ripple test device provided by the utility model;

[0020] Figure 3 yes Figure 2 The enlarged structural diagram at A in the middle;

[0021] Figure 4 The utility model provides a top view schematic diagram of part of the wiring in a DC power supply ripple test device.

[0022] Description of main symbols:

[0023] 1. Oscilloscope; 2. Wiring; 21. Connector; 22. Wire; 23. Probe; 231. Limiting plate; 232. Limiting groove; 24. Probe; 25. Grounding ring; 251. Ring; 252. Connecting rod; 253. Grounding pin; 3. Adjustment unit; 31. Drive plate; 32. Mounting plate; 33. Rotating shaft; 34. Pressure roller; 35. Rotating sleeve; 36. Mounting groove; 37. Connecting ring. DETAILED DESCRIPTION

[0024] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is to enable those skilled in the art to better understand and implement the subject matter described herein. The functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the present specification. Various examples may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0025] Example:

[0026] like Figure 1-Figure 4 As shown, a DC power supply ripple test device includes an oscilloscope 1, a wiring 2 and an adjustment part 3, the wiring 2 includes a connector 21, a wire 22, a probe 23, a probe 24 and a grounding ring 25, the connector 21 is connected to the output end of the oscilloscope 1, the connector 21 is fixedly connected to the wire 22, the other end of the wire 22 is fixedly connected to the probe 23, the end of the probe 23 away from the wire 22 has the probe 24, the grounding ring 25 is made of a metal conductor material, the grounding ring 25 is composed of a ring 251, a connecting rod 252 and a grounding pin 253, the ring 251 is fixedly sleeved on the probe 23, one end of the connecting rod 252 is fixedly connected to the ring 251, and the other end of the connecting rod 252 is fixedly connected to the grounding pin 253, and the adjustment part 3 is used to adjust the distance between the grounding pin 253 and the probe 24, so that the probe 24 contacts the positive electrode of the power supply capacitor and the grounding pin 253 contacts the negative electrode of the power supply capacitor.

[0027] The grounding pin 253 is an elastic metal sheet. The driving adjustment part 3 can deform the metal sheet, thereby changing the distance between the grounding pin 253 and the probe 24 .

[0028] The adjustment part 3 includes a driving plate 31, and a mounting plate 32 is fixedly connected to the driving plate 31 on one side close to the grounding pin 253. The mounting plate 32 is fixedly connected to an adjusting piece, and the adjusting piece contacts the grounding pin 253. The movement of the driving plate 31 drives the mounting plate 32 and the adjusting piece to move synchronously. The movement of the adjusting piece squeezes the grounding pin 253, causing the grounding pin 253 to deform.

[0029] In this embodiment, the shape of the driving plate 31 is L-shaped, the longer plate of the driving plate 31 is parallel to the length direction of the probe 24 , and the shorter plate of the driving plate 31 is fixedly connected to the connecting ring 37 .

[0030] In this embodiment, the mounting plate 32 is U-shaped, and a supporting plate with a triangular structure is fixedly installed between the mounting plate 32 and the driving plate 31 , thereby increasing the stability of the connection between the mounting plate 32 and the driving plate 31 .

[0031] The grounding pin 253 gradually approaches the head of the probe 24 along the length direction of the probe 24 . When the adjusting member moves toward the root of the probe 23 along the length direction of the probe 24 , the movable end of the grounding pin 253 gradually moves toward the probe 24 .

[0032] The adjusting member is composed of a rotating shaft 33 and a pressure roller 34 . The rotating shaft 33 is fixedly connected to the mounting plate 32 . The pressure roller 34 is rotatably sleeved on the outer ring of the rotating shaft 33 to reduce the wear between the adjusting member and the grounding pin 253 .

[0033] In this embodiment, the two ends of the rotating shaft 33 are respectively fixedly connected to the two inner walls of the mounting plate 32, and the grounding pin 253 is located between the pressure roller 34 and the bottom inner wall of the mounting plate 32. The distance between the pressure roller 34 and the bottom inner wall of the mounting plate 32 is greater than the thickness of the grounding pin 253 to prevent the mounting plate 32 from hindering the deformation of the grounding pin 253.

[0034] In this embodiment, the two inner side walls of the mounting plate 32 can limit the grounding pin 253 so that the grounding pin 253 and the pressing roller 34 are completely fitted together, and the adjustment effect of the adjustment part 3 is optimal.

[0035] The middle outer ring of the probe 23 has a thread, and a rotating sleeve 35 is threadedly sleeved on the middle outer ring of the probe 23. The outer ring of the rotating sleeve 35 is provided with an annular mounting groove 36, and a connecting ring 37 rotatably sleeved with the rotating sleeve 35 is provided in the mounting groove 36. The connecting ring 37 is fixedly connected to the driving plate 31. When the rotating sleeve 35 is rotated, the rotating sleeve 35 moves spirally along the length direction of the probe 24, thereby driving the connecting ring 37 and the driving plate 31 to move synchronously.

[0036] A limit plate 231 fixedly connected to the probe 23 is provided on the side of the rotating sleeve 35 close to the grounding needle 253. The limit plate 231 passes through a limit groove 232. The direction of the limit groove 232 is consistent with the length direction of the probe 24. The inner wall of the limit groove 232 fits with the side of the driving plate 31. The limit groove 232 limits the position of the driving plate 31 so that the limit plate 231 can only move along the length direction of the probe 24 to prevent the driving plate 31 from deflecting and causing the pressure roller 34 to separate from the grounding needle 253.

[0037] The adjusting parts 3 are all made of insulating materials to avoid affecting the ground pin 253 and further affecting the test result.

[0038] The conductor 22 is a shielded cable to reduce interference from other signals on the line and improve the accuracy of the test result.

[0039] The outer ring of the probe 23 is made of insulating material to prevent some interference signals from being mixed onto the probe 23 through the hand, thereby increasing the measurement ripple.

[0040] The present embodiment provides a test method for a DC power supply ripple test device, wherein the connector 21 of the wiring 2 is connected to the output end of the oscilloscope 1, the oscilloscope 1 is started and the test adjustment is performed, then the probe 23 of the wiring 2 is moved so that the probe 24 contacts the positive pole of the DC power supply capacitor and the grounding pin 253 corresponds to the negative pole of the DC power supply capacitor, then the rotating sleeve 35 is reversed to drive the connecting ring 37, the driving plate 31, the mounting plate 32, the rotating shaft 33 and the pressing roller 34 to move toward the root of the probe 23. During this process, the pressing roller 34 squeezes the grounding pin 253 so that the grounding pin 253 is deformed toward the probe 24 until the grounding pin 253 contacts the negative pole of the DC power supply capacitor, the rotating sleeve 35 is stopped, the waveform on the display screen of the oscilloscope 1 is observed, the pause button is pressed after the waveform is stable, and the test results are recorded. After the test is completed, the oscilloscope 1 is turned off, the wiring 2 is removed, and the rotating sleeve 35 is rotated forward to return the adjustment part 3 to the initial position.

[0041] The embodiment of the present embodiment is described above in conjunction with the accompanying drawings, but the present embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present embodiment, ordinary technicians in this field can also make many forms without departing from the purpose of the present embodiment and the scope of protection of the claims, all of which are within the protection of the present embodiment.

Claims

1. A DC power supply ripple test device, characterized in that: The invention comprises an oscilloscope (1), a wiring (2) and an adjustment part (3); the wiring (2) comprises a connector (21), a wire (22), a probe (23), a probe (24) and a grounding ring (25); the connector (21) is connected to the output end of the oscilloscope (1); the connector (21) is fixedly connected to the wire (22); the other end of the wire (22) is fixedly connected to the probe (23); the end of the probe (23) away from the wire (22) has the probe (24); the grounding ring (25) is composed of a sleeve ring (251), a connecting rod (252) and a grounding pin (253); the sleeve ring (251) is fixedly sleeved on the probe (23); one end of the connecting rod (252) is fixedly connected to the sleeve ring (251); the other end of the connecting rod (252) is fixedly connected to the grounding pin (253); and the adjustment part (3) is used to adjust the distance between the grounding pin (253) and the probe (24).

2. A DC power supply ripple test device according to claim 1, characterized in that: The grounding pin (253) is an elastic metal sheet.

3. A DC power supply ripple test device according to claim 2, characterized in that: The adjustment part (3) comprises a driving plate (31), a mounting plate (32) is fixedly connected to one side of the driving plate (31) close to the grounding pin (253), and an adjustment member is fixedly connected to the mounting plate (32), and the adjustment member contacts the grounding pin (253).

4. A DC power supply ripple test device according to claim 3, characterized in that: The grounding needle (253) gradually approaches the head of the probe (24) along the length direction of the probe (24).

5. A DC power supply ripple test device according to claim 4, characterized in that: The adjusting member is composed of a rotating shaft (33) and a pressure roller (34). The rotating shaft (33) is fixedly connected to the mounting plate (32). The pressure roller (34) is rotatably sleeved on the outer ring of the rotating shaft (33). The outer ring of the pressure roller (34) contacts the grounding pin (253).

6. A DC power supply ripple test device according to claim 5, characterized in that: The outer ring of the middle part of the probe (23) has a thread, and a rotating sleeve (35) is sleeved on the outer ring of the middle part of the probe (23) through the thread, and an annular placement groove (36) is provided on the outer ring of the rotating sleeve (35), and a connecting ring (37) rotatably sleeved with the rotating sleeve (35) is arranged in the placement groove (36), and the connecting ring (37) is fixedly connected to the driving plate (31).

7. A DC power supply ripple test device according to claim 6, characterized in that: A limiting plate (231) fixedly connected to the probe (23) is provided on one side of the rotating sleeve (35) close to the grounding pin (253), the limiting plate (231) passes through a limiting groove (232), the direction of the limiting groove (232) is consistent with the length direction of the probe (24), and the inner wall of the limiting groove (232) is in contact with the side surface of the driving plate (31).

8. A DC power supply ripple test device according to claim 1, characterized in that: The adjustment parts (3) are all made of insulating material.

9. A DC power supply ripple test device according to claim 1, characterized in that: The conductor (22) is a shielded cable.

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