Detection device for assembling precision of CD iron core of mutual inductor

Abstract

The utility model discloses a mutual inductor CD iron core assembling precision detection device comprising a height sensing unit, a counter, an indicating lamp and a power supply, the power supply is electrically connected with the height sensing unit, the counter and the indicating lamp respectively, and the height sensing unit is electrically connected with the counter and the indicating lamp respectively; the height sensing unit is used for measuring the height of an assembled CD iron core in a detected mutual inductor, sending a first signal to the counter and the indicator light when the height of the CD iron core is within a preset height range, and sending a second signal to the indicator light when the height of the CD iron core is not within the preset height range; the counter is used for counting after receiving the first signal and recording the number of the detected mutual inductors with qualified CD iron core assembly precision; the indicating lamp is used for emitting first indicating light after receiving the first signal and emitting second indicating light after receiving the second signal. According to the utility model, whether the assembling precision of the CD iron core of the mutual inductor is qualified can be effectively and rapidly detected.

Description

Technical Field

[0001] This utility model relates to the field of automated testing and assembly control technology, specifically to a testing device for the assembly accuracy of a current transformer CD core. Background Technology

[0002] In complex operating conditions, high-precision assembly of openable instrument transformers is crucial for ensuring product performance and stability. However, traditional manual assembly methods suffer from numerous technical bottlenecks, such as the assembly accuracy of the transformer's CD core being affected by human factors and poor process consistency. These problems not only affect the measurement accuracy of the transformer but also pose a threat to the product's reliability and safety. The lack of effective automated testing methods for detecting the assembly accuracy of the transformer's CD core hinders the progress of large-scale industrial production of instrument transformers. Utility Model Content

[0003] The purpose of this invention is to overcome the defects in the existing technology and provide a testing device that can automatically detect whether the assembly accuracy of the CD core of a current transformer is up to standard.

[0004] To achieve the above objectives, the technical solution of this utility model is to design a testing device for the assembly accuracy of a current transformer CD core, comprising: a height sensing unit, a counter, an indicator light, and a power supply, wherein the power supply is electrically connected to the height sensing unit, the counter, and the indicator light, and the height sensing unit is electrically connected to the counter and the indicator light.

[0005] The height sensing unit is used to measure the height of the assembled CD core in the current transformer under test. When the height of the CD core is within a preset height range, it sends a first signal to the counter and the indicator light. When the height of the CD core is not within the preset height range, it sends a second signal to the indicator light.

[0006] The counter is used to count after receiving the first signal and record the number of tested current transformers whose CD core assembly accuracy is qualified.

[0007] The indicator light is used to emit a first indicator light after receiving the first signal, and to emit a second indicator light after receiving the second signal.

[0008] Furthermore, the testing equipment for the assembly accuracy of the current transformer CD core also includes a buzzer, which is electrically connected to the height sensing unit and the power supply respectively.

[0009] The buzzer is used to emit a first prompt tone after receiving the first signal and to emit a second prompt tone after receiving the second signal.

[0010] Furthermore, the height sensing unit includes a height sensor and a microprocessor, the height sensor being electrically connected to the microprocessor, and the microprocessor being electrically connected to the counter and the indicator light respectively;

[0011] The height sensor is used to measure the height of the assembled CD core in the current transformer under test, and transmits the height information of the CD core to the microprocessor.

[0012] The microprocessor is used to determine whether the height of the CD core is within a preset height range, and sends the first signal to the counter and the indicator light when the height of the CD core is within the preset height range, and sends the second signal to the indicator light when the height of the CD core is not within the preset height range.

[0013] Furthermore, the height sensing unit is a laser rangefinder.

[0014] Furthermore, the height sensing unit is an eddy current displacement sensor.

[0015] Furthermore, the testing equipment for the assembly accuracy of the current transformer CD core also includes a housing, on which a testing area is provided for placing the current transformer to be tested. The probes of the height sensor are disposed on both sides of the testing area, the indicator light is disposed on the housing, and the microprocessor, the counter and the power supply are disposed in the housing.

[0016] Furthermore, the counter includes a display screen disposed on the housing, which is used to display the number of tested current transformers whose CD core assembly accuracy is qualified.

[0017] The advantages and beneficial effects of this utility model are as follows: by testing whether the height of the CD core of the current transformer after assembly is within the preset height range, it is possible to quickly determine whether the assembly accuracy of the CD core of the current transformer is qualified. This can effectively and quickly detect whether the assembly accuracy of the CD core of the current transformer is qualified, thereby improving the assembly accuracy of the CD core of the current transformer and the product quality of the current transformer, and providing technical support for the large-scale industrial production of current transformers. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of the instrument for testing the assembly accuracy of the CD core of the current transformer according to this utility model.

[0019] In the diagram: 11. Height sensing unit; 12. Counter; 13. Indicator light; 14. Power supply; 15. Buzzer. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0021] according to Figure 1 As shown, this utility model is a testing device for the assembly accuracy of the CD core of a current transformer, comprising: a height sensing unit 11, a counter 12, an indicator light 13, and a power supply 14. The power supply 14 is electrically connected to the height sensing unit 11, the counter 12, and the indicator light 13, respectively. The height sensing unit 11 is electrically connected to the counter 12 and the indicator light 13, respectively. The height sensing unit 11 is used to measure the height of the assembled CD core in the current transformer under test. When the height of the CD core is within a preset height range, the assembly accuracy of the CD core of the current transformer under test is determined to be qualified, and the device sends signals to the counter 12 and the indicator light 13. Lamp 13 sends a first signal; when the height of the CD core is not within the preset height range, it is determined that the assembly accuracy of the CD core of the tested transformer is unqualified, and a second signal is sent to indicator lamp 13; counter 12 is used to count after receiving the first signal and record the number of tested transformers with qualified CD core assembly accuracy; indicator lamp 13 is used to emit a first indicator light after receiving the first signal to indicate that the assembly accuracy of the CD core of the tested transformer is qualified; and emit a second indicator light after receiving the second signal to indicate that the assembly accuracy of the CD core of the tested transformer is unqualified.

[0022] Open-type current transformers typically consist of a C-type core and / or a D-type core joined together to form a complete closed magnetic ring. The mating surfaces of the C-type and D-type cores must be tightly fitted with no visible gaps. This is because for every 0.1mm increase in air gap between the interfaces, the effective permeability of the magnetic circuit in the formed magnetic ring decreases by approximately 10-20%, directly affecting the transformer's ratio accuracy and phase error. This invention uses the height of the assembled CD core in the current transformer to infer its magnetic circuit closure state. By measuring the height of the assembled CD core, the assembly accuracy of the CD core is determined. When the height of the CD core is within a preset range, the assembly accuracy is considered to meet the standard. A counter records the number of qualified assembled current transformers in real time, and an indicator light (e.g., green) illuminates the corresponding color to indicate that the assembly accuracy of the currently tested CD core is qualified. When the height of the current transformer CD core is not within the preset height range, it is determined that the assembly accuracy of the current transformer CD core does not meet the standard. The indicator light emits a corresponding color light (such as a red light) to indicate that the assembly accuracy of the current transformer CD core being tested is unqualified and needs to be adjusted.

[0023] Different types of current transformers have corresponding preset height ranges for their CD cores, which are determined based on the sum of the CD core heights of different types of current transformers and the acceptable gap range between the CD core mating surfaces. A dedicated detection device can be provided for each type of current transformer to detect its CD core height. In some embodiments, a scanning lens can be installed on the detection device, and preset height ranges for multiple types of current transformers can be pre-stored in the device. By scanning the current transformer and selecting its corresponding preset height range, it can be determined whether the CD core height of the current transformer is within its corresponding preset height range.

[0024] This invention quickly determines whether the assembly accuracy of the CD core of the current transformer is qualified by testing whether the height of the CD core after assembly is within a preset height range. It can effectively and quickly detect whether the assembly accuracy of the CD core of the current transformer is qualified, thereby improving the assembly accuracy of the CD core of the current transformer and the product quality of the current transformer, and providing technical support for the large-scale industrial production of current transformers.

[0025] To enhance the prompting effect, a preferred embodiment of this utility model further includes a buzzer 15 in the instrument for detecting the assembly accuracy of the current transformer CD core. The buzzer 15 is electrically connected to the height sensing unit 11 and the power supply 14 respectively. The buzzer 15 is used to emit a first prompt tone after receiving a first signal to indicate that the assembly accuracy of the current transformer CD core under test is qualified; and to emit a second prompt tone after receiving a second signal to indicate that the assembly accuracy of the current transformer CD core under test is unqualified.

[0026] To achieve the effect of inferring the assembly accuracy of the CD core by measuring its height, a preferred embodiment of this invention comprises a height sensing unit including a height sensor and a microprocessor. The height sensor is electrically connected to the microprocessor, and the microprocessor is electrically connected to a counter and an indicator light. The height sensor measures the height of the assembled CD core in the current transformer under test and transmits the CD core height information to the microprocessor. The microprocessor determines whether the CD core height is within a preset height range. When the CD core height is within the preset height range, a first signal is sent to the counter and the indicator light. When the CD core height is not within the preset height range, a second signal is sent to the indicator light.

[0027] To increase the accuracy of CD core height detection, the preferred embodiment of this utility model is that the height sensing unit is a laser rangefinder sensor.

[0028] To increase the flexibility of CD core height detection, the preferred embodiment of this utility model is that the height sensing unit is an eddy current displacement sensor.

[0029] To make the testing equipment easier to use, a preferred embodiment of this utility model further includes a housing for testing the assembly accuracy of the CD core of the current transformer. The housing has a testing area for placing the current transformer under test. The probes of the height sensor are set on both sides of the testing area. An indicator light is set on the housing. The microprocessor, counter and power supply are set inside the housing.

[0030] To facilitate the viewing of the number of current transformers with qualified CD core assembly accuracy, a preferred embodiment of this utility model is that the counter includes a display screen, which is disposed on the housing and used to display the number of tested current transformers with qualified CD core assembly accuracy.

[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A testing device for the assembly accuracy of a current transformer CD core, characterized in that, include: The system includes a height sensing unit, a counter, an indicator light, and a power supply. The power supply is electrically connected to the height sensing unit, the counter, and the indicator light, respectively. The height sensing unit is also electrically connected to the counter and the indicator light, respectively. The height sensing unit is used to measure the height of the assembled CD core in the current transformer under test. When the height of the CD core is within a preset height range, it sends a first signal to the counter and the indicator light. When the height of the CD core is not within the preset height range, it sends a second signal to the indicator light. The counter is used to count after receiving the first signal and record the number of tested current transformers whose CD core assembly accuracy is qualified. The indicator light is used to emit a first indicator light after receiving the first signal, and to emit a second indicator light after receiving the second signal.

2. The testing equipment for the assembly accuracy of the CD core of the current transformer according to claim 1, characterized in that, The testing equipment for the assembly accuracy of the current transformer CD core also includes a buzzer, which is electrically connected to the height sensing unit and the power supply respectively. The buzzer is used to emit a first prompt tone after receiving the first signal and to emit a second prompt tone after receiving the second signal.

3. The testing equipment for the assembly accuracy of the CD core of the current transformer according to claim 1, characterized in that, The height sensing unit includes a height sensor and a microprocessor. The height sensor is electrically connected to the microprocessor, and the microprocessor is electrically connected to the counter and the indicator light, respectively. The height sensor is used to measure the height of the assembled CD core in the current transformer under test, and transmits the height information of the CD core to the microprocessor. The microprocessor is used to determine whether the height of the CD core is within a preset height range, and sends the first signal to the counter and the indicator light when the height of the CD core is within the preset height range, and sends the second signal to the indicator light when the height of the CD core is not within the preset height range.

4. The testing equipment for the assembly accuracy of the CD core of the current transformer according to claim 3, characterized in that, The altitude sensing unit is a laser rangefinder.

5. The testing equipment for the assembly accuracy of the CD core of the current transformer according to claim 3, characterized in that, The height sensing unit is an eddy current displacement sensor.

6. The testing equipment for the assembly accuracy of the CD core of the current transformer according to claim 3, characterized in that, The instrument for testing the assembly accuracy of the CD core of the current transformer also includes a housing, on which a testing area is provided for placing the current transformer to be tested. The probes of the height sensor are located on both sides of the testing area. The indicator light is located on the housing. The microprocessor, the counter, and the power supply are located inside the housing.

7. The testing equipment for the assembly accuracy of the CD core of a current transformer according to claim 6, characterized in that, The counter includes a display screen, which is disposed on the housing, and is used to display the number of tested current transformers whose CD core assembly accuracy is qualified.

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