Jiaxing Boyuan Electronic Technology Co., Ltd
Contact: Zhang Jiguang
Address: Jiaxing City Xiuzhou District Jiaxing Road 1237
[Online test system equipment] production automation test system development trend
When the smart phones, multimedia audio and video products, digital photographic camera products and other high-tech electronic products to high integration, high-performance direction at the same time, the test system function requirements are more complex. To the smart phone, for example, dozens of grams of weight, palm size size, complete call, information exchange, audio and video and other multimedia file processing, network links, satellite and ground content transmission and analysis ... ... these complex functions, usually By the audio processing, wireless communications, storage, power supply and other different units to achieve. With the industry's focus on the user experience, manufacturers not only need the core unit of performance testing, but also to achieve the whole HMI test, acoustic environment testing.
Figure 1 shows the network telephone integrated test system, from the core components to achieve the integration of the whole test. Covering the functional test, assembled after the phone HMI (man-machine interface) test, and in the silencer for acoustic testing. First, the phone features the motherboard contains the core audio processing chip, network communication module, power supply module, need to carry out accurate audio protocol analysis, network communication test, USB read and write test, DC power and POE power test, and MAC address, HID , Software version settings and verification. The face of high-density device layout, how to install and locate the function board to ensure that the signal access and output accurate and reliable? The system uses integrated probe disk, anti-wrong plug design, positioning pin and other technology to ensure the installation accuracy; use of bearing compression design, to ensure positioning benchmark.
Second, the phone HMI test. Including LED lights color status, LCD touch screen, background lights, keyboard keys and other test items, the need for integrated use of motion control and machine vision technology and industrial cameras, finger cylinders and capacitor pen and other executive components. Precise and reliable control is the real simulation of the actual operation of the key, how to accurately control the finger-type cylinder button strength and itinerary? Select the ordinary linear motor will greatly increase the difficulty of control, where a number of voice coil motor, it has a high frequency response, high precision, short stroke characteristics, very consistent with the needs of the system implementing agencies. In addition, the system of the face of different shapes and shapes of the measured pieces of the rule when the ability to change is also taken into account.
Finally, acoustic testing is also a very important part. The test system integrates an acoustic laboratory, audio characteristics for microphone and speakers, and audio coupling tests. In a certain range of different frequency points, enter the given test signal, and through the algorithm analysis THD, THD + N, SPL and other parameters. To improve the quality of the test, you can expand the test frequency range, enter a more complex test signal, etc.; on the basis of quality assurance, test system how to effectively reduce costs and improve test efficiency? The system uses a parallel test technology, through the test vendor's own software platform to achieve the test sequence editing and parallel execution. Test results show that compared to the older generation of equipment, test time savings of up to 48%.
In order to reduce the difficulty of the test, often in the product after assembly and functional and HMI test, this has two significant shortcomings, one has been assembled because, if found at this time failed, will take a long demolition rework Time, the second is installed on the function board can achieve the test project is limited, the accuracy is not high, which will have a potential impact on the quality of the product. Therefore, now the top manufacturers are required before the assembly of the functional board for testing, better guarantee the performance of products, reduce the quality of hidden dangers.
A test system that runs through laboratories and production lines
The speed of technological innovation has continued to promote the updating of the product iteration, to ensure product quality while shortening the new design time to market, to improve product competitiveness is essential. Testing, as an important part of ensuring product quality, throughout the design and development, experimental verification to the production test and other links, manufacturers need more rapid and reliable and flexible common test system, to meet: First, the same type or the same series Products, from the experimental test to the production line test test equipment should be based on the same architecture and software platform, two, in the experimental verification stage, the test function covers a comprehensive and highly flexible; Third, the production line test phase, the equipment needs to have a strong Ability to change and upgrade capacity.
Figure 2 shows a model of the General Motors sensor test platform. Figure 2a is a complete version, including the four major functional subsystems, from the left to complete a performance test, left two, left three for special functional verification, for example, vibration, temperature, flow, stress, etc., left four integrated control cabinet. Take the wheel speed and position sensor as an example, in the process of experiment development, you can set the different temperature, speed, product and target wheel relative displacement conditions, the sensor to do a full range of performance testing.
The main difference between the performance test and the experimental verification phase at this stage is that the environmental parameters have been determined, but the test efficiency and cost are demanding. Figure 2b is a final inspection system for the wheel speed sensor on the production line. The main body is based on the left one performance test subsystem in Figure 2a, replacing the left four control systems with smaller volumes of the PXI bus modules and integrating them into the cabin below the main body. The system works by means of a combination of the master and the test module, and testing the different types of sensors requires only the corresponding modules. The modules are mounted on the console and are fitted with flanges, fixtures, cylinders, electrical components and core test circuits. They are connected to the dowel through a quick-connect electrical interface for quick implementation of a wide range of different sizes and shapes. Change type.
The platform provides a variety of components of the selection, testing the user can be measured according to the type of sensor and test items to match a set of personalized test system to meet a variety of air pressure, oil pressure, liquid level, oil, Temperature, wheel speed and position of the sensor, such as performance testing and fatigue testing requirements. Product conversion through the standardized interface to achieve, the system can be based on the unique identification of the test module to identify the type of sensor under test, automatically the corresponding scheduled test. For different products, test software platform to provide a different software toolkit, the test sequence can be transplantable editable parallel test, equipment, hardware and software between the good compatibility to ensure a strong platform for the highly flexible and accurate test, and thus ensure that the product Reliable quality.
This solution runs through R & D and production testing, and for sensor manufacturers, while maintaining product performance upgrades and functional expansion, while maintaining the product of low cost and high efficiency.