the shoe cover machine automatic test systems of 51 one-chip computers
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The widespread application of Surface Mount Technology (SMT) in products such as computers, network communications, consumer electronics, and automotive electronics has led to increasingly complex, high-precision, and multifunctional electronic assemblies. Accurate testing techniques can enhance manufacturing efficiency and ensure the production of qualified products. Furthermore, incorporating testing into product design, equipment investment, manufacturing, and quality assurance processes can effectively reduce costs. Consequently, testing has become an essential aspect of the product design and manufacturing process. This document primarily focuses on the automatic test system for the control panel of a shoe cover machine. The test system consists of two main modules: the upper computer and the lower-position unit. The upper computer, typically a PC, utilizes Visual Basic (VB) to create an operational interface that displays real-time status, pilot lamp states, a data recording window, command buttons, and input signals. The lower-position unit comprises the measurement circuit board and peripheral devices. The detection circuit employs the TC12C5608 microcontroller from the 51 series as the core, which includes communication channel modules, power supply modules, and signal acquisition circuits. The lower-position unit can simulate the required sensor signals for the control panel and analyze the functional block diagram of the control signal for the control panel's electrical machinery. The STC12C5608 microcontroller offers several key performance features: high speed with an 8051 enhanced kernel, a wide voltage range of 5.5V to 3.5V, low power consumption in idle and power-down modes, and an operating frequency of 0-35 MHz, which is equivalent to a standard 51 series operating at 0-420 MHz. The microcontroller supports external crystal or internal resistance-capacitance oscillators for clock setup during ISP programming. It features on-chip flash memory with various storage capacities, a RAM data storage range of 256 to 512 bytes, and on-chip EEPROM functionality. It includes 10 ADCs, 8 channels, and 4 PWM outputs that can also function as D/A converters. The device is equipped with 16 timers, compatible with standard 51 timers, and includes programmable clock output functions. The hardware watchdog timer (WDT), high-speed SPI communication port, and full-duplex asynchronous serial communication port (UART) are also integrated. The microcontroller has 25 general-purpose I/O ports that can be configured into four modes: quasi-bidirectional, weak pull-up, input-only, and high impedance. Each I/O port can handle a power capacity of 20 mA, with a maximum total chip output of 55 mA. The minimum system configuration is necessary for the normal operation of the microcontroller, which typically requires careful arrangement according to the microcontroller's specifications to ensure its proper functioning. The minimum system includes a reset circuit, an oscillator circuit, and the microcontroller itself, enabling basic operations and external data communication to complete functions such as analog-to-digital conversion.
The automatic test system for the shoe cover machine's control panel is designed to ensure the reliability and functionality of electronic components through a structured testing framework. The upper computer serves as the user interface, facilitating interaction with operators and providing real-time feedback on the testing process. The use of Visual Basic for the operational interface allows for customization and flexibility in the display of critical parameters, making it easier for users to monitor the status of the testing.
The lower-position unit's reliance on the TC12C5608 microcontroller is central to its operational capabilities. This microcontroller's enhanced performance characteristics, including its high-speed processing and low power consumption, make it suitable for real-time applications where prompt response and energy efficiency are paramount. The ability to simulate sensor signals is particularly significant, as it allows for comprehensive testing of the control panel without the need for actual sensors, thereby streamlining the testing process.
The design of the minimum system is crucial for establishing a robust foundation for the microcontroller's operation. By integrating essential components such as the reset circuit and oscillator, the system can maintain stability and ensure that the microcontroller executes its programmed tasks effectively. The modularity of the lower-position unit allows for easy upgrades and modifications, accommodating future advancements in technology or changes in testing requirements.
In summary, the automatic test system for the shoe cover machine's control panel exemplifies the integration of advanced microcontroller technology with practical testing methodologies, enhancing the overall quality assurance process in electronic manufacturing. This system not only improves production efficiency but also contributes to the reduction of costs associated with product development and testing.With the wide application of SMT technology in products such as the computer, network communication, consuming electron and car electron, etc. , the assembly of the electronic product prones to complicating, high precision, melting and multi-functional intensively, the accurate test tactics can help the manufacturer to raise the efficiency, produce
the qualified products; Meanwhile, introduce testing in product design, equipment investment, making and quality assurance course that can also lower costs effectively. Therefore, test has already become the indispensable important links in the manufacture process of product design.
Have made detailed introduction in design that this text is directed primarily to the circuit automatic test system of control panel of the shoe cover machine. This test system divides two major module to make up: Upper computer and lower-position unit. The upper computer mainly means the PC, edits a operation interface on the PC with VB language, operate interfaces and include the real-time status, pilot lamp of the state, record data window which starts the command button, input signal.
What the lower-position unit refers to is mainly that one measures circuit board and peripheral excuse apparatus. The detection circuit regards the TC12C 5608 one-chip computers of series 51 as the core, it including communication channel module, power supply module, examining in the circuit of acquisition of signal.
The lower-position unit can imitate the required sensor signal of the control panel and gather analyzing its functional block diagram of hardware of the control signal of the electrical machinery of the control panel is shown as in Fig. 1 mainly. STC12C5608 one-chip computer main performance has the following several respect: High speed: A clock / machine cycle, 8051 kernels of enhancement type, ordinary 51 velocity ratios are 8- 12 times faster.
Wide-voltage: 5. 5- 3. 5 V. Low power consumption is designed: Idle mode, power down mode. Operating frequency: 0- 35 MHz is equivalent to ordinary 51: 0- 420MHz. Clock: The external crystal or internal resistance-capacitance oscillator is available, set up when ISP downloads the programming user program. Flash programm store on-chip: The byte of 30K/ 28K/ 24K/ 20K/ 16K/ 12K/ 8K/ 4K, wipes and writes the number of times it 100, 000 or more times.
RAM data storage on-chip: 256512 bytes. On-chip EEPROM function. ISP/ IAP is in programmable system / programmable. 10 ADCs, 8 passways. PWM of No. 4 can also act as No. D/ A use 4. 6 16 timers, the compatible ordinary timer T0/ T1 of 51, PCA of No. 4 is 4 timers too. Programmable clock output function, T0 can be in P1. 0 exports the clock, T1 can be in P1. One output clock. There are hardware watchdogs WDT, SPI communication port at a high speed, the asynchronous serial communication port UART of full duplex, Compatible ordinary 51 serial port, compatible ordinary 51 instruction set. Mouth of 25 common I/ Os, after resetting: Quasi-bidirectional mouth / weak pull upward ordinary 51 traditional the intersection of I/ O and mouth, Can set up into four kinds of modes: It is quasi-bidirectional mouth / weak pull upward, only for inputting /high impedance, it is leak to turn on.
Each I/ O a power-handling capability achievable 20 mA, but the whole chip maximum can`t exceed 55 mA. What is called minimum system, can enable the circuit design of normal operation of the one-chip computer, usually need to carry on the reasonable disposition according to the one-chip computer materials, realize the normal operation of the one-chip computer.
The minimum system can`t realize the work of one-chip computer each module, but can expand and reach data communication through outside, completion of the function that AD changes, etc. The minimum system of the one-chip computer includes: Reset circuit, Jingzhen circuit, one-chip computer, the circuit diagram of minimum system is sh
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