Measuring circuit for measuring insulation thickness

Abstract

The present application discloses a measuring circuit for measuring the thickness of an insulating layer, the measuring circuit for measuring the thickness of an insulating layer comprising a power module and a test module, the power module being electrically connected to the test module, one end of the test module being electrically connected to the conductor of the object to be measured, the other end of the test module being electrically connected to the insulating layer of the object to be measured, and the power module, the test module and the object to be measured together forming a circuit loop.

Description

Technical Field

[0001] The utility model relates to the field of insulation detection, in particular to a measuring circuit for measuring the thickness of an insulation layer. Background Art

[0002] In the production of electrical equipment, it is usually necessary to wrap an insulating layer on the outside of the live material. The insulating layer can protect the live material inside from mechanical damage and chemical corrosion. At the same time, the insulating layer can prevent the live material from contacting water vapor and leaking electricity. In addition, the insulating layer can also prevent people from contacting the live material and causing electric shock. The insulating layer generally loses its insulating ability under excessively high voltage, which is called insulation breakdown.

[0003] In the prior art, physical measurement is usually used to measure the thickness of the insulating layer wrapped around the conductive material. First, the staff needs to cut open the conductive material and the insulating layer wrapped around the conductive material. Then, the staff uses a series of measuring tools such as a vernier caliper to measure the insulating layer. This measurement method requires the staff to read the readings, which may result in large errors. In addition, when the conductive material and the insulating layer wrapped around the conductive material are cut open, the insulating layer will be deformed to a certain extent, thus affecting the measurement results.

[0004] In addition, the physical measurement method requires workers to cut the energized material and the external insulation layer into several small pieces, and then use measuring tools to measure and read, and finally compare to get the value of the thinnest thickness on the insulation side. This physical measurement method is too cumbersome, and workers need to spend a lot of time and energy to measure. In addition, this measurement method is prone to human reading errors, resulting in a large deviation between the measured results and the true value. Utility Model Content

[0005] One advantage of the present invention is that it provides a measuring circuit for measuring the thickness of an insulating layer. This measuring circuit for measuring the thickness of an insulating layer uses insulation breakdown to measure the thickness of the insulating layer. This method avoids cutting energized materials and performing physical measurements, thereby reducing manual readings and making the measurement results more accurate.

[0006] Another advantage of the present invention is that it provides a measuring circuit for measuring the thickness of the insulating layer. This measuring circuit for measuring the thickness of the insulating layer records the voltage that breaks down the insulating layer and obtains the thickness of the insulating layer by looking up a table, thereby avoiding cumbersome measurement methods and reducing the time and energy of the staff for measurement.

[0007] In order to achieve at least one of the above advantages of the present invention, the present invention provides a measuring circuit for measuring the thickness of an insulating layer, wherein the measuring circuit for measuring the thickness of an insulating layer comprises:

[0008] a power module, the power module is used to supply power;

[0009] A test module, the power module is electrically connected to the test module, one end of the test module is electrically connected to the conductor of the object to be tested, the other end of the test module is electrically connected to the insulation layer of the object to be tested, and the power module, the test module and the object to be tested together form a circuit loop.

[0010] According to an embodiment of the present invention, the power module includes an adjustable power supply and at least two conductors, two ends of the adjustable power supply are respectively connected to the two conductors, the adjustable power supply is used for power supply, and the conductors are used for power transmission.

[0011] According to one embodiment of the present invention, the test module includes a current test piece and at least two clamping pieces, one end of the adjustable power supply is connected to the current test piece through the conductor, the two clamping pieces are respectively connected to the conductor and the insulating layer of the object to be tested, one end of the current test piece away from the adjustable power supply is connected to one of the clamping pieces through the conductor, and the other clamping piece is connected to the end of the adjustable power supply away from the current test piece through the conductor.

[0012] According to an embodiment of the present invention, the electrical conductor is implemented to include a wire, and the current testing device is implemented to include an ammeter.

[0013] According to an embodiment of the present invention, the conductor has a wire insulation layer, the wire insulation layer is wrapped around the conductor, and the wire insulation layer is difficult to be broken down by voltage.

[0014] According to an embodiment of the present invention, the measuring circuit for measuring the thickness of the insulating layer further comprises a conductive sheet, which is adhered to the outside of the insulating layer, wherein one of the clamping members is connected to the conductor and the other clamping member is connected to the conductive sheet.

[0015] According to an embodiment of the present invention, the conductive sheet may be made of a copper foil material.

[0016] According to an embodiment of the present invention, the measurement circuit for measuring the thickness of the insulation layer further includes a controller, and the controller is communicatively connected with the adjustable power supply and the current tester.

[0017] According to an embodiment of the present invention, the measuring circuit for measuring the thickness of the insulating layer includes a switch, the switch is connected to the conductors respectively, and the switch is connected in series to the adjustable power supply.

[0018] According to an embodiment of the present invention, the measuring circuit for measuring the thickness of the insulating layer further includes a resistor, two ends of the resistor are respectively connected to the conductor, and the resistor is connected in series to the adjustable power supply.

[0019] Through understanding of the following description, further objects and advantages of the present utility model will be fully reflected.

[0020] These and other purposes, features and advantages of the present invention are fully reflected in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A structural schematic diagram of a measuring circuit for measuring the thickness of an insulating layer according to the utility model is shown.

[0022] Figure 2 Another structural schematic diagram of the measuring circuit for measuring the thickness of the insulating layer according to the utility model is shown. DETAILED DESCRIPTION

[0023] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0024] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0025] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0026] refer to Figure 1 to Figure 2According to a preferred embodiment of the present invention, a measuring circuit for measuring the thickness of an insulating layer is described in detail below. The measuring circuit for measuring the thickness of an insulating layer is used to measure an object to be measured 800, and the object to be measured 800 includes a conductor 801 and an insulating layer 802, wherein the insulating layer 802 is wrapped around the conductor 801, the conductor 801 can conduct electricity, and the insulating layer 802 cannot conduct electricity within a certain voltage range.

[0027] The measuring circuit for measuring the thickness of the insulating layer includes a power module 10 and a test module 20. The power module 10 is electrically connected to the test module 20, one end of the test module 20 is electrically connected to the conductor 801 of the object to be tested 800, and the other end of the test module 20 is electrically connected to the insulating layer 802 of the object to be tested 800, and the power module 10, the test module 20 and the object to be tested 800 together form a circuit loop.

[0028] The power module 10 includes an adjustable power supply 11 and at least two conductors 12, and the test module 20 includes a current test piece 21 and at least two clamping pieces 22. The two ends of the adjustable power supply 11 are respectively connected to the two conductors 12, one end of the adjustable power supply 11 is connected to the current test piece 21 through the conductor 12, and the two clamping pieces 22 are respectively connected to the conductor 801 and the insulating layer 802 of the object to be tested 800, one end of the current test piece 21 away from the adjustable power supply 11 is connected to one of the clamping pieces 22 through the conductor 12, and the other clamping piece 22 is connected to the end of the adjustable power supply 11 away from the current test piece 21 through the conductor 12. The adjustable power supply 11 is used for power supply, and the conductor 12 is used for transmitting power.

[0029] In an example, the electrical conductor 12 is implemented to include a wire, and the current testing device 21 is implemented to include an ammeter.

[0030] Since the insulating layer 802 cannot be energized within the low voltage range, when the voltage value of the adjustable power supply 11 is within the low voltage range, the current test piece 21 has no reading, that is, the circuit loop is not energized. The staff needs to continuously adjust the voltage of the adjustable power supply 11 until the voltage breaks through the insulating layer 802, so that the value of the current test piece 21 changes, that is, the circuit loop is energized to generate current. When the value of the current test piece 21 changes, the voltage provided by the adjustable power supply 11 is recorded, and the CTI index of the material making the insulating layer 802 is queried, and then the wall thickness of the clamp 22 connected to the insulating layer 802 is queried through the corresponding relationship between CTI and the minimum insulation penetration distance.

[0031] Preferably, the conductor 12 has a wire insulation layer, and the wire insulation layer is wrapped around the conductor 12. The wire insulation layer is difficult to be broken down by voltage. When the voltage of the adjustable power supply 11 breaks down the insulation layer 802, the wire insulation layer outside the conductor 12 cannot be broken down, thereby preventing the occurrence of safety accidents.

[0032] Furthermore, the measurement circuit for measuring the thickness of the insulating layer also includes a conductive sheet 30, which is pasted on the outside of the insulating layer 802, wherein one of the clamping members 22 is connected to the conductor 801, and the other clamping member 22 is connected to the conductive sheet 30. Since the thinner part of the insulating layer 802 will be broken down first, the conductive sheet 30 receives the current, and the weak current is detected by the test module 20. At this time, the voltage value of the adjustable power supply 11 is recorded. In this way, the voltage value recorded at this time is the breakdown voltage of the thinnest part of the insulating layer 802, and the thinnest thickness of the insulating layer 802 is measured by looking up the table.

[0033] The conductive sheet 30 may be made of a copper foil material.

[0034] In a preferred embodiment, the measuring circuit for measuring the thickness of the insulating layer further includes a controller 40, and the controller 40 is in communication connection with the adjustable power supply 11 and the current test piece 21. When the current test piece 21 cannot detect the current, the controller 40 controls the adjustable power supply 11 to continuously increase the voltage until the insulating layer 802 is broken down by the voltage, so that the current test piece 21 detects the current signal, at which time the controller 40 records the current voltage and turns off the adjustable power supply 11. The controller 40 avoids the staff from having to perform a series of operations such as adjustment and recording, and reduces the reading error of the staff, thereby improving the measurement accuracy.

[0035] Furthermore, the measurement circuit for measuring the thickness of the insulating layer includes a switch 50, and the switch 50 is connected to the conductor 12 respectively. The switch 50 is connected in series to the adjustable power supply 11. The switch 50 is used to disconnect the circuit loop to prevent the adjustable power supply 11 from supplying power for a long time and causing the circuit loop to heat up, thereby protecting the adjustable power supply 11 and other components.

[0036] The measuring loop for measuring the thickness of the insulating layer also includes a resistor 60, the two ends of the resistor 60 are respectively connected to the conductor 12, the resistor 60 is connected in series to the adjustable power supply 11, and the resistor 60 is used to protect the circuit and limit the current. According to the formula U=IR, during the voltage adjustment process of the adjustable power supply 11 from low to high, the resistance value of the circuit loop is small, which will cause the current value in the circuit loop to be large. The measurement range of the current test piece 21 is large, which may easily lead to inaccurate displayed values. By setting the resistor 60, the resistance in the circuit loop can be increased to reduce the current value in the circuit loop, narrow the detection range of the current test piece 21, and make the displayed value more accurate.

[0037] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A measuring circuit for measuring the thickness of an insulating layer, for measuring the insulating layer of an object to be measured, wherein the object to be measured comprises a conductor and an insulating layer, wherein the insulating layer is wrapped around the outside of the conductor, characterized in that: The measuring circuit for measuring the thickness of the insulating layer comprises: a power module, the power module is used to supply power; A test module, the power module is electrically connected to the test module, one end of the test module is electrically connected to the conductor of the object to be tested, the other end of the test module is electrically connected to the insulation layer of the object to be tested, and the power module, the test module and the object to be tested together form a circuit loop.

2. The measuring circuit for measuring the thickness of an insulating layer according to claim 1, characterized in that: The power module includes an adjustable power supply and at least two conductors. Two ends of the adjustable power supply are respectively connected to the two conductors. The adjustable power supply is used for power supply, and the conductors are used for power transmission.

3. The measuring circuit for measuring the thickness of an insulating layer according to claim 2, characterized in that: The test module includes a current test piece and at least two clamping pieces, one end of the adjustable power supply is connected to the current test piece through the conductor, the two clamping pieces are respectively connected to the conductor and the insulating layer of the object to be tested, one end of the current test piece away from the adjustable power supply is connected to one of the clamping pieces through the conductor, and the other clamping piece is connected to the end of the adjustable power supply away from the current test piece through the conductor.

4. The measuring circuit for measuring the thickness of an insulating layer according to claim 3, characterized in that: The electrical conductor is implemented to include a wire, and the current testing device is implemented to include an ammeter.

5. The measuring circuit for measuring the thickness of an insulating layer according to claim 2, characterized in that: The conductor has a wire insulation layer, which is wrapped around the conductor and is difficult to be broken down by voltage.

6. The measuring circuit for measuring the thickness of an insulating layer according to claim 4, characterized in that: The measuring circuit for measuring the thickness of the insulating layer also includes a conductive sheet, which is adhered to the outside of the insulating layer, wherein one of the clamping members is connected to the conductor, and the other clamping member is connected to the conductive sheet.

7. The measuring circuit for measuring the thickness of an insulating layer according to claim 6, characterized in that: The conductive sheet may be implemented as being made of a copper foil material.

8. The measuring circuit for measuring the thickness of an insulating layer according to claim 7, characterized in that: The measuring circuit for measuring the thickness of the insulating layer also includes a controller, and the controller is communicatively connected with the adjustable power supply and the current testing device.

9. The measuring circuit for measuring the thickness of an insulating layer according to claim 8, characterized in that: The measuring circuit for measuring the thickness of the insulating layer includes a switch, the switch is connected to the conductors respectively, and the switch is connected in series to the adjustable power supply.

10. The measuring circuit for measuring the thickness of an insulating layer according to claim 9, characterized in that: The measuring loop for measuring the thickness of the insulating layer also includes a resistor, two ends of the resistor are respectively connected to the conductor, and the resistor is connected in series to the adjustable power supply.

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