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Multi-parameter monitor PCB copy board is mainly to complete monitor control board copy board (including PCB drawing file production, schematic file production, BOM bill of materials production) and monitor control board chip decryption, PCB proofing board, IC components A series of work such as supporting procurement, PCBA assembly welding and prototype debugging. Hualan Technology successfully completed a series of multi-parameter monitor PCB copying tasks with a professional PCB copying team combined with accurate PCB copying software in 2 weeks.
The multi-parameter monitor can provide important patient information for medical clinical diagnosis. Through various functional modules, it can detect the human body’s ECG signal, heart rate, blood oxygen saturation, blood pressure, respiratory rate, body temperature and other important parameters in real time, and realize Supervisory alarm of parameters. Information storage and transmission is an important equipment for monitoring patients.
The monitor consists of two single-chip microcomputers to form a dual CPU system. The single chip microcomputer 1 completes the signal detection, processing, and data storage of body temperature, ECG waveform, and pulse shape, and displays and alarms the waveforms and parameters regularly through the LCD display screen.
The single-chip microcomputer 2 undertakes the time-consuming blood pressure measurement and blood oxygen saturation detection, so that it does not affect the normal operation of the entire system, and also undertakes the measurement of the heart rate and the respiratory rate.
The information exchange between the two single-chip computers is carried out through an 8-bit parallel port, and the communication control is realized by two I/O ports. Specifically, the P1 port is used with two high-speed input and output I/O ports (HIS.0, HSO.0) for data transfer between two single-chip computers. This continuous mode between two computers belongs to a loosely coupled multiprocessor system (Reference 8), which is relatively simple in hardware implementation. It only needs to design the necessary communication protocol and data transmission mode for its communication mode during software programming. .
The system converts biomedical signals into electrical signals through the signal detection and preprocessing module, and performs preprocessing such as interference suppression, signal filtering, and amplification. Then, through the data extraction and processing module for sampling, quantification, and calculation and analysis of each parameter, the result is compared with the set threshold, supervision and alarm are carried out, the result data is stored in RAM in real time, and can be transmitted to the PC in real time. The value of each parameter can be displayed on the machine in real time.
The system also takes advantage of the PC's strong functions and large amount of processing information, and transmits the data collected by the monitor to the PC through the RS-232 serial port. The PC performs data storage and further processing of data, and uses various charts and other forms to display parameters and trend graphs, providing a very friendly software interface for the operator.
The monitor control board is a six-layer board. Hualan Technology successfully completed the six-layer board copy of the monitor control board in 3 days, including the production of PCB diagram files, schematic diagram files, and BOM bill of materials.
The decryption of the single-chip microcomputer on the monitor control board is the difficulty of the entire monitor board copy project.
