An oscilloscope probe conversion device

Abstract

The application provides an oscilloscope probe conversion device, which comprises an oscilloscope probe and a BNC male connector, and is characterized in that: the head of the oscilloscope probe is inserted into the protective shell of the BNC male connector, so that the signal collection end of the oscilloscope probe is connected with the signal access end of the BNC male connector, and the signal shielding layer of the oscilloscope probe is connected with the negative electrode of the BNC male connector; and a locking screw corresponding to the head of the oscilloscope probe is threadedly connected on the protective shell of the BNC male connector. The application has simple structure and is convenient to transform, the transmission of detection signals is realized through the plug-in connection of the BNC male connector and a BNC female connector on a test table, and the grounding and firmness of the oscilloscope probe are effectively ensured.

Description

TECHNICAL FIELD

[0002] The present application relates to the field of integrated circuit testing, in particular to an oscilloscope probe conversion device for dynamic waveform electrical parameter acquisition of a circuit. BACKGROUND

[0004] In current signal testing, the signal output end of the test bench is generally divided into two types. One is to directly use a lead column to output the signal test end for testing, and the shield ground is also output by a lead column. In this case, the signal test needs the hook of the oscilloscope probe to hook the signal lead column, and the ground wire is connected to the shield ground lead column by using an alligator clip. The advantage of this test method is that the oscilloscope probe has a sliding switch, which can switch between the probe x10 position and the x1 position. The disadvantage is that the signal test end and the shield ground end are both output by a lead column, and the oscilloscope probe hook and the alligator clip are used to electrically connect the lead column, which is not firm enough and has the risk of sliding and falling.

[0005] The second type is to directly use a BNC female head to output the signal test end for testing, and the signal output end and the signal shield ground end are both output from the BNC female head. In this case, the signal test needs to use a BNC double-male test connection line for testing. The advantage of this test is that the connection is reliable, and the BNC male head and the BNC female head are electrically connected by a mechanical tightening device, and the signal transmission test end and the shield ground end are connected stably and reliably. The disadvantage is that the BNC double-male test connection line does not have an attenuation control switch, and can only be tested at x1 position. In some signal tests, it is not possible to perform attenuation test at x10 position. SUMMARY

[0007] The present application is to overcome the shortcomings of the prior art, such as unreliable connection of the oscilloscope probe and inability of the BNC double-male test connection line to perform attenuation, and to provide an oscilloscope probe conversion device.

[0008] The present application provides the following technical solutions:

[0009] An oscilloscope probe conversion device, comprising: an oscilloscope probe and a BNC male connector, characterized in that: the probe cap of the oscilloscope probe is removed to expose the signal collection end and the signal shielding layer of the head of the oscilloscope probe, and the head of the oscilloscope probe is inserted into the protective shell of the BNC male connector, so that the signal collection end is connected to the positive electrode of the BNC male connector, and the signal shielding layer is connected to the negative electrode of the BNC male connector.

[0010] On the basis of the above technical solutions, the following further technical solutions can also be provided:

[0011] The signal shielding layer is a ring-shaped metal layer coaxially distributed with the probe head body, and there is a certain distance between the signal shielding layer and the signal collection end.

[0012] The protective shell of the BNC male connector is made of metal, and at least one clamping spring sheet corresponding to the signal shielding layer is connected in the protective shell.

[0013] A locking screw corresponding to the probe head body is threadedly connected on the protective shell of the BNC male connector.

[0014] Advantages of the application:

[0015] The application has the advantages of simple structure, convenient modification, transmission of detection signals through the insertion of the BNC male connector and the BNC female connector on the test table, and effective guarantee of the grounding, firmness and signal interference weakening of the oscilloscope probe. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the application. DETAILED DESCRIPTION

[0019] As Figure 1 shown, an oscilloscope probe conversion device comprises an oscilloscope probe and a BNC male connector 2, and a cylindrical protective shell 2a is threadedly connected on one end of the BNC male connector 2.

[0020] The probe cap of the oscilloscope probe is removed to expose the head body 1 of the oscilloscope probe, and a needle-shaped signal acquisition end 3, i.e. the positive electrode of the oscilloscope probe, extends from one end of the head body 1. A ring-shaped signal shielding layer 4, i.e. the negative electrode of the oscilloscope probe, of metal conductor material is distributed on the head body 1 on one side of the signal acquisition end 3, and the ring-shaped signal shielding layer 4 and the signal acquisition end 3 are spaced apart by a certain distance.

[0021] The head body 1 of the oscilloscope probe is inserted into the protective shell 2a of the BNC male connector, so that the signal acquisition end 3 is inserted into the positive electrode connecting column slot 2b of the BNC male connector, and the positive electrode of the oscilloscope probe is in communication with the positive electrode of the BNC male connector.

[0022] A pair of clamping spring sheets 2c with elasticity and conductivity are connected on the inner wall of the protective shell 2a, and when the signal acquisition end 3 is inserted into the positive electrode connecting column slot 2b of the BNC male connector, the bending part of the clamping spring sheet 2c is clamped on the signal shielding layer 4, so that the negative electrode of the oscilloscope probe is in communication with the negative electrode of the BNC male connector (the protective shell and the shell).

[0023] A locking screw 5 corresponding to the probe head body is threadedly connected on the protective shell 2a on one side of the clamping spring sheet 2c. The locking screw 5 and the clamping spring sheet 2b ensure the stability of the connection between the head body 1 of the oscilloscope probe and the BNC male connector. The protective shell of the BNC male connector is made of metal.

[0024] Thus, the BNC male connector of the connector body is directly inserted with the BNC female connector of the test end during testing, and the original 10-position and ×1-position switching attenuation test function of the original oscilloscope probe is retained. The signal transmission test end and the shielding ground end are connected stably and reliably, and the attenuation control switch is also provided.

Claims

1. An oscilloscope probe conversion device comprising: The oscilloscope probe and BNC male joint are characterized in that: the probe cap of the oscilloscope probe is removed to expose the signal collection end and the signal shielding layer of the oscilloscope probe head, the oscilloscope probe head is inserted into the protective shell of the BNC male joint, so that the signal collection end is connected with the positive electrode of the BNC male joint, and the signal shielding layer is connected with the negative electrode of the BNC male joint. The signal shielding layer is a ring-shaped metal layer coaxially arranged with the probe head body, and a certain distance is arranged between the signal shielding layer and the signal collection end. The protective shell of the BNC male joint is made of metal, and at least one clamping spring sheet corresponding to the signal shielding layer is connected in the protective shell. A locking screw corresponding to the probe head body is threadedly connected on the protective shell of the BNC male joint.

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