A current caliper testing tool and current caliper testing method thereof

Abstract

The present invention proposes a current caliper test fixture, comprising: a bottom plate, a first connector, a second connector, an insulating conduit and a load resistor; the two ends of the bottom plate are respectively fixedly connected with a left baffle and a right baffle, a top plate is connected between the upper ends of the left baffle and the right baffle, and the bottom plate, the left baffle, the right baffle and the top plate are all conductors; the first connector is connected to the left baffle, and its outer line is conductive with the left baffle, and the second connector is connected to the right baffle, and its outer line is conductive with the right baffle; the insulating conduit is arranged between the end face of the left baffle and the end face of the right baffle, and is located between the bottom plate and the top plate, and a wire is arranged in the insulating conduit, and the two ends of the wire are respectively connected with the inner line of the first connector and the inner line of the second connector; the load resistor is connected in series between the inner line and the outer line of the second connector. The present invention also proposes a current caliper test method, which is implemented using the current caliper test fixture described above.

Description

Technical Field

[0001] The invention belongs to the field of electrical equipment testing, and in particular relates to a current caliper testing tool and a current caliper testing method thereof. Background Art

[0002] When testing the performance of the current caliper, under normal circumstances, when the signal source is directly connected to the 50Ω load for testing, the test result is inaccurate due to the thin connection line, large impedance, and test resistance greater than 50Ω. In addition, the external electromagnetic field will induce current in the test circuit, affecting the test results and causing inaccurate performance testing of the current caliper. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a current caliper testing tool and a current caliper testing method thereof, so as to overcome the above problems or at least partially solve or alleviate the above problems.

[0004] The present invention provides a current caliper test tool, comprising:

[0005] A bottom plate, two ends of the bottom plate are respectively fixedly connected with a left baffle and a right baffle, a top plate is connected between the upper ends of the left baffle and the right baffle, and the bottom plate, the left baffle, the right baffle and the top plate are all conductors;

[0006] A first connector and a second connector, wherein the first connector is connected to the left baffle, and an external line thereof is in conduction with the left baffle, and the second connector is connected to the right baffle, and an external line thereof is in conduction with the right baffle;

[0007] An insulating conduit, the insulating conduit being arranged between the end surface of the left baffle and the end surface of the right baffle and being located between the bottom plate and the top plate, a wire being arranged in the insulating conduit, and two ends of the wire being respectively connected to the inner wire of the first connector and the inner wire of the second connector;

[0008] A load resistor is connected in series between the inner line and the outer line of the second connector.

[0009] The present invention also has the following optional features.

[0010] Optionally, through holes are respectively provided on the end surfaces of the left baffle plate and the right baffle plate, and two ends of the insulating conduit are respectively connected to the inner ends of the through holes on the left baffle plate and the right baffle plate.

[0011] Optionally, the first connector is connected to the outer side of the through hole on the left baffle, and the second connector is connected to the outer side of the through hole on the right baffle.

[0012] Optionally, both sides of the top plate are connected to the upper edge of the left baffle and the upper edge of the right baffle respectively through snap-fit ​​devices.

[0013] Optionally, a connection port is provided on the load resistor, and the connection port matches one end of the second connector.

[0014] Optionally, the insulating conduit is a hard plastic tube or a ceramic tube.

[0015] Optionally, both the first connector and the second connector are N-type RF connectors.

[0016] The present invention also provides a current caliper testing method, comprising the following steps:

[0017] S001: Connect the left baffle and the right baffle on the bottom plate, connect the insulating conduit between the left baffle and the right baffle, connect the first connector and the second connector on the left baffle and the right baffle respectively, so that the external wires of the first connector and the second connector are connected through the left baffle, the right baffle and the bottom plate, and the internal wires of the first connector and the second connector are connected through the wire passing through the insulating conduit;

[0018] S002: Connect a load resistor to the second connector so that the load resistor is connected in series between the inner line and the outer line of the second connector;

[0019] S003: clamp the tested caliper on the insulating conduit, and then connect the top plate between the upper ends of the left baffle and the right baffle, so that the external lines of the first connector and the second connector are connected through the left baffle, the right baffle and the top plate;

[0020] S004: Connect a spectrum analyzer to the caliper under test, connect a radio frequency signal source to the first connector to transmit signals of different frequencies, display voltage values ​​of different frequencies induced by the caliper under test through the spectrum analyzer, and then determine whether the caliper under test is qualified based on the comparison between the measured value and the calibration value.

[0021] The bottom plate, left baffle plate, right baffle plate and top plate in the current caliper test fixture and the seat surface automatic protection method thereof of the present invention are all made of metal material, which can not only make the impedance of the line through which the current passes smaller and make the entire test load closer to 50Ω, but also during the test, because the tested caliper is clamped on the insulating conduit fixed between the metal plates, the metal plates can shield the external electromagnetic field and eliminate external interference, thereby making the test results more stable and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the current caliper test tool of the present invention;

[0023] Figure 2It is a schematic diagram of the structure of the current caliper test tool of the present invention;

[0024] Figure 3 It is a circuit diagram of the current caliper test fixture of the present invention.

[0025] In the above figure: 1 bottom plate; 2 left baffle; 3 right baffle; 4 top plate; 5 first connector; 6 second connector; 7 insulating conduit; 8 load resistor; 9 clip.

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0027] Example 1

[0028] refer to Figure 1 , Figure 2 and Figure 3 The embodiment of the present invention provides a current caliper test fixture, comprising: a bottom plate 1, a first connector 5, a second connector 6, an insulating conduit 7 and a load resistor 8; the two ends of the bottom plate 1 are respectively fixedly connected with a left baffle 2 and a right baffle 3, a top plate 4 is connected between the upper ends of the left baffle 2 and the right baffle 3, and the bottom plate 1, the left baffle 2, the right baffle 3 and the top plate 4 are all metal conductors; the first connector 5 is connected to the left baffle 2, and its outer line is conductive with the left baffle 2, and the second connector 6 is connected to the right baffle 3, and its outer line is conductive with the right baffle 3; the insulating conduit 7 is arranged between the end face of the left baffle 2 and the end face of the right baffle 3, and is located between the bottom plate 1 and the top plate 4, a wire is arranged in the insulating conduit 7, and the two ends of the wire are respectively connected with the inner line of the first connector 5 and the inner line of the second connector 6; the load resistor 8 is connected in series between the inner line and the outer line of the second connector 6.

[0029] The outer line of the first connector 5 is connected to the outer line of the second connector 6 through the left baffle 2, the bottom plate 1, the top plate 4 and the right baffle 3. The outer line of the second connector 6 is connected to the inner line of the second connector 6 through the load resistor 8. The inner line of the second connector 6 is connected to the inner line of the first connector 5 through a wire. A complete test loop can be formed by connecting the RF signal source to the first connector 5. After the tested caliper is stuck on the insulating conduit 7, the RF signal source sends RF signals of different frequencies, the spectrum analyzer receives the electromagnetically induced signal on the tested caliper, and displays the detected voltage value. After comparing the detected voltage value with the calibration value, it can be determined whether the tested caliper is qualified according to the error size.

[0030] Example 2

[0031] refer to Figure 2On the basis of Example 1, through holes are respectively provided on the end faces of the left baffle 2 and the right baffle 3, and the two ends of the insulating conduit 7 are respectively connected to the inner ends of the through holes on the left baffle 2 and the inner ends of the through holes on the right baffle 3.

[0032] The inner ends of the through holes on the left baffle 2 and the right baffle 3 can respectively fix the two ends of the insulating conduit 7, while the outer ends can respectively connect the first connector 5 and the second connector 6, and facilitate the two ends of the wires in the insulating conduit 7 to be connected to the inner wires of the first connector 5 and the second connector 6 respectively.

[0033] Example 3

[0034] refer to Figure 1 and Figure 2 On the basis of Example 2, the first connector 5 is connected to the outside of the through hole on the left baffle 2, and the second connector 6 is connected to the outside of the through hole on the right baffle 3.

[0035] A radio frequency signal source can be connected to the first connector 5 connected to the outside of the through hole of the left baffle 2, and a load resistor can be connected to the second connector 6 connected to the outside of the through hole on the right baffle 3, so that the radio frequency signal source and the load resistor will not affect the test of the tested caliper on the insulating conduit 7 clamped between the left baffle 2 and the right baffle 3.

[0036] Example 4

[0037] refer to Figure 1 and Figure 2 On the basis of Example 1, the two sides of the top plate 4 are connected to the upper edge of the left baffle 2 and the upper edge of the right baffle 3 respectively through buckles 9.

[0038] The buckle 9 can be unlocked and connected at any time, which is convenient for the staff to replace the tested caliper after removing the top plate 4. After replacing the tested caliper, the staff can connect the top plate 4 through the buckle 9.

[0039] Example 5

[0040] refer to Figure 2 On the basis of Embodiment 1, a connection port is provided on the load resistor 8 , and the connection port matches one end of the second connector 6 .

[0041] The load resistor 8 is connected to the second connector 6 through the connection port. The connection is firm and easy to operate. The tester does not need to weld and fix the load resistor 8.

[0042] Example 6

[0043] refer to Figure 1 and Figure 2 Based on Example 1, the insulating conduit 7 is a hard plastic tube or a ceramic tube.

[0044] The insulating conduit 7 is made of a hard plastic tube or a ceramic tube. After the tested caliper is clamped on the insulating conduit 7, the insulation is reliable, deformation is not prevented, and the clamping is firm.

[0045] Example 7

[0046] refer to Figure 1 and Figure 2 Based on Example 1, the first connector 5 and the second connector 6 are both N-type RF connectors.

[0047] The N-type RF connector is a medium-power connector with threaded connection, commonly used in RF coaxial cables, with the characteristics of high reliability, strong vibration resistance, and excellent mechanical and electrical properties.

[0048] Example 8

[0049] The embodiment of the present invention further provides a current clamp test method, comprising the following steps: S001: connecting a left baffle 2 and a right baffle 3 on a bottom plate 1, connecting an insulating conduit 7 between the left baffle 2 and the right baffle 3, connecting a first connector 5 and a second connector 6 on the left baffle 2 and the right baffle 3, respectively, so that the outer wires of the first connector 5 and the second connector 6 are connected through the left baffle 2 and the right baffle 3 and the bottom plate 1, and the inner wires of the first connector 5 and the second connector 6 are connected through the wire passing through the insulating conduit 7; S002: connecting a load resistor 8 to the second connector 6, so that the load The resistor 8 is connected in series between the inner line and the outer line of the second connector 6; S003: The tested caliper is clamped on the insulating conduit 7, and then the top plate 4 is connected between the upper ends of the left baffle 2 and the right baffle 3, so that the outer lines of the first connector 5 and the second connector 6 are connected through the left baffle 2, the right baffle 3 and the top plate 4; S004: A spectrum analyzer is connected to the tested caliper, and a radio frequency signal source is connected to the first connector 5 to transmit signals of different frequencies. The voltage values ​​of different frequencies induced by the tested caliper are displayed by the spectrum analyzer, and then the tested caliper is judged to be qualified based on the comparison between the measured value and the calibration value.

[0050] In step S001, it is necessary to ensure that the connection between the bottom plate 1 and the left baffle 2 and the right baffle 3 is stable and the conductive contact is excellent, and at the same time, ensure that the insulating conduit 7 between the left baffle 2 and the right baffle 3 is stable and the insulation is excellent; in step S002, the resistance of the load resistor 8 is 50Ω; in step S003, ensure that the connection between the top plate 4 and the left baffle 2 and the right baffle 3 is stable and the conductive contact is excellent; in S004, the RF signal source sends 1KHZ signal, 2KHZ signal, 4KHZ signal and 8KHZ signal respectively for a period of time, and records the calibration value and measured value of the voltage on the tested caliper under each RF signal respectively.

[0051] The test data is shown in Table 1:

[0052] Table 1

[0053]

[0054] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The components and structures not described in detail in this embodiment are well-known components and common structures or common means in the industry, and are not described here one by one.

Claims

1. A current caliper test tool, characterized in that: include: A bottom plate (1), wherein two ends of the bottom plate (1) are respectively fixedly connected to a left baffle plate (2) and a right baffle plate (3), a top plate (4) is connected between the upper ends of the left baffle plate (2) and the right baffle plate (3), and the bottom plate (1), the left baffle plate (2), the right baffle plate (3) and the top plate (4) are all metal conductors; a first connector (5) and a second connector (6), wherein the first connector (5) is connected to the left baffle (2), and an external line thereof is in conduction with the left baffle (2); and the second connector (6) is connected to the right baffle (3), and an external line thereof is in conduction with the right baffle (3); an insulating conduit (7), the insulating conduit (7) being arranged between an end surface of the left baffle (2) and an end surface of the right baffle (3), and being located between the bottom plate (1) and the top plate (4), a wire being arranged inside the insulating conduit (7), and two ends of the wire being respectively connected to an inner wire of the first connector (5) and an inner wire of the second connector (6); A load resistor (8), wherein the load resistor (8) is connected in series between the inner line and the outer line of the second connector (6).

2. The current caliper test fixture according to claim 1, characterized in that: Through holes are respectively provided on the end surface of the left baffle plate (2) and the end surface of the right baffle plate (3), and the two ends of the insulating conduit (7) are respectively connected to the inner end of the through hole on the left baffle plate (2) and the inner end of the through hole on the right baffle plate (3).

3. The current caliper test fixture according to claim 2, characterized in that: The first connector (5) is connected to the outer side of the through hole on the left baffle plate (2), and the second connector (6) is connected to the outer side of the through hole on the right baffle plate (3).

4. The current caliper test fixture according to claim 1, characterized in that: The two sides of the top plate (4) are connected to the upper edge of the left baffle (2) and the upper edge of the right baffle (3) respectively via buckles (9).

5. The current caliper test fixture according to claim 1, characterized in that: The load resistor (8) is provided with a connection port, and the connection port matches one end of the second connector (6).

6. The current caliper test fixture according to claim 1, characterized in that: The insulating conduit (7) is a hard plastic tube or a ceramic tube.

7. The current caliper test fixture according to claim 1, characterized in that: The first connector (5) and the second connector (6) are both N-type radio frequency connectors.

8. A current caliper testing method, characterized in that: The following steps are involved: S001: Connect the left baffle and the right baffle on the bottom plate, connect the insulating conduit between the left baffle and the right baffle, connect the first connector and the second connector on the left baffle and the right baffle respectively, so that the external wires of the first connector and the second connector are connected through the left baffle, the right baffle and the bottom plate, and the internal wires of the first connector and the second connector are connected through the wire passing through the insulating conduit; S002: Connect a load resistor to the second connector so that the load resistor is connected in series between the inner line and the outer line of the second connector; S003: clamp the tested caliper on the insulating conduit, and then connect the top plate between the upper ends of the left baffle and the right baffle, so that the external lines of the first connector and the second connector are connected through the left baffle, the right baffle and the top plate; S004: Connect a spectrum analyzer to the caliper under test, connect a radio frequency signal source to the first connector to transmit signals of different frequencies, display voltage values ​​of different frequencies induced by the caliper under test through the spectrum analyzer, and then determine whether the caliper under test is qualified based on the comparison between the measured value and the calibration value.

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