A multi-channel FPC test device

Abstract

The present invention relates to the technical field of a multi-channel FPC testing device, and in particular to a multi-channel FPC testing device, which is simple to operate, has accurate and clear test results, and is an FPC testing device that can quickly and accurately determine the problem points of defective products; it not only supports simultaneous testing of multiple channels of the same style of FPC, but also supports simultaneous multi-channel testing of FPCs with multiple different functions. Moreover, the detection of different styles of FPCs is independent of each other, and the detection personnel only need to perform different test operations on different FPCs to conveniently and quickly detect whether the produced FPCs are good products, and the problem points of defective products can also be quickly and accurately located.

Description

Technical Field

[0001] The invention relates to the technical field of a multi-channel FPC testing device, in particular to a hardware circuit design for basic function inspection and bad point judgment of an FPC containing functional modules such as a sensor and a MIC. Background Art

[0002] With the development of electronic equipment, the functions of products are becoming more and more complex, but the structural space of products is getting smaller and smaller, and the layout area of ​​the motherboard is also getting smaller and smaller. In addition, many devices, such as IMU, Light Sensor, Proximity Sensor, MIC and other devices, have special requirements for the placement and direction of components and EMI performance, so the demand for various FPC boards is increasing. However, as component packaging becomes increasingly miniaturized, the process requirements for FPC production equipment are also getting higher and higher. How to achieve efficient mass production is a problem that every manufacturer needs to solve. One of the most critical issues that need to be solved for efficient production is how to quickly, simply and accurately test whether the products produced are good products. Therefore, it is very necessary to develop an FPC test device that is simple to operate, has accurate and clear test results, and can quickly determine the problem points of defective products. Summary of the invention

[0003] The technical problem to be solved by the present invention is to develop an FPC testing device which is simple to operate, has accurate and clear test results, and can quickly and accurately determine the problem points of defective products.

[0004] A multi-channel FPC test device of the present invention comprises a sensor test device, a three-in-one IMU_FPC test device, a Light&Proximity_FPC test device and a MICFPC test device. The sensor test device is used to expand three-channel or even more test interfaces to achieve an efficient testing method. The three-in-one IMU_FPC test device checks whether an FPC is installed properly by initialization. The Light&Proximity_FPC test device automatically detects whether the FPC is a good product. The MICFPC test device tests the FPC through a MIC drive circuit and an indication circuit, supports simultaneous multi-channel detection of FPCs with multiple different functions, and the detection of different styles of FPCs is independent of each other.

[0005] A multi-channel FPC testing device of the present invention uses an MCU with multiple SPI and I2C protocol channels because most sensors on the market use I2C or SPI communication protocols. Different types of FPCs in the same channel use the same channel I2C or SPI interfaces of different channels as needed. Interfaces of different channels are selected between different channels. When multiple sensors use the same I2C channel, different device communication addresses are used for distinction. In this way, three or even more test interfaces can be expanded to achieve an efficient testing method.

[0006] A multi-channel FPC test device of the present invention, a three-in-one IMU_FPC test device checks whether the FPC is installed properly by initialization. Because the initialization operations of different sensors are independent of each other, when the initialization fails, the red light can be turned on to indicate which Sensor has failed to initialize. After the initialization is successful, the test device automatically sets several expected values ​​for the Sensor, and starts to read the actual value of the Sensor and compare it with the expected value.

[0007] In a multi-channel FPC testing device, a Light&Proximity_FPC testing device of the present invention, after the FPC is installed, the testing device is powered on, and the testing device automatically detects whether the FPC is a good product. When the initial test fails, the indicator light of the corresponding module will always be on in red. If no red light is on, it indicates that the initial test is successful.

[0008] In a multi-channel FPC testing device of the present invention, the detection of MIC FPC is a relatively independent module, which mainly comprises a MIC driving circuit and an indicating circuit.

[0009] The technical solution adopted by the present invention is that the test device mainly comprises a power supply module, an MCU module, a multi-channel FPC interface module and a multi-channel test result indication module, and each module is connected to each other through the MCU module. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is the overall framework diagram of the multi-channel FPC test device;

[0011] Figure 2 It is the internal connection diagram of the multi-channel FPC test device;

[0012] Figure 3 It is the detection principle and operation mode of the three-in-one IMU FPC;

[0013] Figure 4 It is the Light&Proximity_FPC detection principle and operation mode;

[0014] Figure 5This is the schematic diagram of MIC detection. DETAILED DESCRIPTION

[0015] The specific implementation modes of the present invention are further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0016] A multi-channel FPC test device of the present invention comprises a sensor test device, a three-in-one IMU_FPC test device, a Light&Proximity_FPC test device and a MICFPC test device. The sensor test device is used to expand three-channel or even more test interfaces to achieve an efficient testing method. The three-in-one IMU_FPC test device checks whether an FPC is installed properly by initialization. The Light&Proximity_FPC test device automatically detects whether the FPC is a good product. The MICFPC test device tests the FPC through a MIC drive circuit and an indication circuit, supports simultaneous multi-channel detection of FPCs with multiple different functions, and the detection of different styles of FPCs is independent of each other.

[0017] The present invention discloses a multi-channel FPC testing device, which not only supports the simultaneous testing of multiple FPCs of the same style, but also supports the simultaneous multi-channel detection of FPCs with multiple different functions. The detection of different styles of FPCs is independent of each other. The detection personnel only need to perform different test operations on different FPCs to conveniently and quickly detect whether the produced FPCs are good products, and the problem points of bad products can also be quickly and accurately located. Because most sensors on the market use I2C or SPI communication protocols, this test equipment uses an MCU with multiple SPI and I2C protocol channels, such as Figure 2 The figure shows the internal connection method of a multi-channel test device. Different types of FPCs in the same channel use the same channel I2C or different channel SPI interfaces as needed. Different channels use different channel interfaces. When multiple sensors use the same I2C channel, different device communication addresses are used to distinguish them. This method can expand 3 or even more test interfaces to achieve efficient testing.

[0018] The present invention discloses a multi-channel FPC testing device, which not only supports the simultaneous testing of multiple FPCs of the same style, but also supports the simultaneous multi-channel testing of FPCs with multiple different functions. The testing of different styles of FPCs is independent of each other. The testing personnel only need to perform different testing operations on different FPCs to conveniently and quickly detect whether the produced FPCs are good products. The problem points of bad products can also be quickly and accurately located. The process of the multi-channel FPC testing device testing the three-in-one IMU_FPC (gyroscope, acceleration sensor and geomagnetic sensor three-in-one) is as follows: Figure 3 As shown, after the tester installs the FPC to be tested, the test device is powered on. The test device checks whether the FPC is installed properly by initialization. Because the initialization operations of different sensors are independent of each other, when the initialization fails, the red light can be turned on to indicate which Sensor has failed the initial test. After the initialization is successful, the test device automatically sets several expected values ​​for the Sensor, and starts to read the actual value of the Sensor and compares it with the expected value. When the tester is testing the IMU_FPC, he needs to shake the FPC in different directions, up, down, left and right. When the Sensor value reaches the expected value, the corresponding indicator light will be displayed in green to indicate that the relevant Sensor test has passed. Otherwise, the indicator light corresponding to the corresponding Sensor will be displayed in yellow to indicate that the actual value of the Sensor cannot reach the expected value and the FPC is bad. The tester can judge whether the FPC is qualified by the status of the indicator light. When the FPC is found to be bad, the tester only needs to quickly determine the cause of the bad condition according to the color of the indicator light (yellow and red).

[0019] The present invention provides a multi-channel FPC testing device, which not only supports the simultaneous testing of multiple FPCs of the same style, but also supports the simultaneous multi-channel testing of FPCs with multiple different functions. The testing of different styles of FPCs is independent of each other. The testing personnel only need to perform different testing operations on different FPCs to conveniently and quickly detect whether the produced FPCs are good products. The problem points of bad products can also be quickly and accurately located. It is similar to the IMU_FPC testing method, such as Figure 4 This is the Light&Proximity_FPC test process and test principle. After installing the FPC, power on the test equipment. The test device will automatically detect whether the FPC is a good product. After the initial trial fails, the indicator light of the corresponding module will always be red. If no red light is on, it means that the initial trial is successful. The tester only needs to make corresponding operations, such as approaching the sensor with his hand or approaching the sensor with a flashlight, and then according to the color change of the indicator light, you can clearly know whether the FPC is a good product. If it is not a good product, you can also use the color of the indicator light to determine where the problem is.

[0020] The multi-channel FPC testing device of the present invention not only supports the simultaneous testing of multiple FPCs of the same style, but also supports the simultaneous multi-channel detection of FPCs with multiple different functions. The detection of FPCs of different styles is independent of each other. The detection personnel only need to perform different test operations on different FPCs to conveniently and quickly detect whether the produced FPCs are good products, and the problem points of defective products can also be quickly and accurately located.

[0021] A multi-channel FPC testing device of the present invention not only supports simultaneous testing of multiple channels of FPCs of the same style, but also supports simultaneous multi-channel detection of FPCs of multiple different functions, and the detection of different styles of FPCs is independent of each other. The detection personnel only need to perform different test operations on different FPCs to conveniently and quickly detect whether the produced FPCs are good products, and the problem points of bad products can also be quickly and accurately located. The detection of MIC FPC is a relatively independent module, which mainly includes a MIC driving circuit and an indicating circuit. After the test personnel install the MIC FPC, they need to play a specific sound signal to the MIC, and the brightness of the MIC_FPC indicator light can change continuously with the volume of the sound signal. The schematic diagram of the driving part is shown in FIG. Figure 5 As shown, the sound signal output by the MIC is amplified after passing through a two-stage amplifier composed of transistors, and then directly drives the transistor after filtering out the negative signal through a diode. The amplification effect of the transistor is used to control the size of the LED drive current with the intensity of the sound signal. Within a certain range, the louder the sound, the higher the LED drive current and the brighter the light; otherwise, the light is dimmer. The tester can judge the quality of the MIC_FPC based on the changes in the brightness of the indicator light.

[0022] The multi-channel FPC testing device of the present invention has a mounting method, a connecting method or a setting method which are all common mechanical methods and can be implemented as long as they can achieve their beneficial effects.

[0023] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A multi-channel FPC testing device, characterized in that: It includes Sensor test device, three-in-one IMU_FPC test device, Light&Proximity_FPC test device and MICFPC test device. The Sensor test device is used to expand three or more test interfaces to achieve efficient testing methods. The three-in-one IMU_FPC test device checks whether the FPC is installed properly by initialization. The Light&Proximity_FPC test device automatically detects whether the FPC is a good product. The MICFPC test device tests the FPC through the MIC drive circuit and the indication circuit. It supports simultaneous multi-channel detection of FPCs with multiple functions, and the detection of different styles of FPCs is independent of each other. The Sensor test device is a different type of FPC in the same channel. It uses the same channel I2C or different channel SPI interfaces as needed. Different channels use different channel interfaces. When multiple sensors use the same I2C channel, different device communication addresses are used to distinguish them. This method can expand three or even more test interfaces to achieve efficient testing.

2. A multi-channel FPC testing device as claimed in claim 1, characterized in that: The three-in-one IMU_FPC test device checks whether the FPC is installed properly by initialization. The initialization operations of different sensors are independent of each other. When the initialization fails, the red light can be turned on to indicate that a certain sensor has failed to initialize. After the initialization is successful, the test device automatically sets multiple expected values ​​for the sensor, and starts to read the actual value of the sensor and compare it with the expected value.

3. A multi-channel FPC testing device as claimed in claim 1, characterized in that: In the Light&Proximity_FPC test device, after the FPC is installed and the test equipment is powered on, the test device will automatically detect whether the FPC is a good product. If the initial trial fails, the indicator light of the corresponding module will be always red. If no red light is on, it means that the initial trial is successful.

4. A multi-channel FPC testing device as claimed in claim 1, characterized in that: The detection of the MICFPC test device is a relatively independent module, which mainly includes a MIC drive circuit and an indication circuit.

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