0 Preface VHDL ultra-high-speed integrated circuit hardware description language is gradually developed with the integration and high integration of integrated circuits. It is an IEEE standard hardware description language for multi-domain and multi-level design and testing of digital systems. Since it was born in the US Department of Defense as a circuit design tool in the 1970s, it has become a very popular hardware description tool and is supported by most EDA tools. With the continuous advancement of electronic technology, the design of digital systems is developing in the direction of high speed, large capacity and small volume. The traditional bottom-up model can no longer meet the design requirements of chips and systems. In order to improve design efficiency, the VHDL design method that can simplify the design process and greatly reduce the design difficulty has attracted widespread attention. Compared with other traditional integrated circuit description languages, VHDL has obvious advantages: (1) Powerful function and strong description. It can be used for the description, simulation and design of gate level, circuit level and even system level. (2) Good portability. The same description can be used for design and simulation tools and different platforms. (3) The development cycle is short and the cost is low. (4) The design life cycle can be extended. (5) With circuit simulation and verification functions, users can even perform source code level debugging without writing phasor tests. The designer can skip the circuit experiment and directly compare and select various schemes, so that the design efficiency can be improved. (6) The description of the design is relatively independent. (7) Language standards and specifications are easy to share and reuse. At present, VHDL penetrates electronic technology and various related industrial fields, and plays an increasingly important role in industrial design. Worldwide, the application research on VHDL in many fields, especially in chips and system design, has achieved many remarkable results. The combination of VHDL and medicine is bound to become a new research direction of electronic automation design (EDA). This paper mainly studies the application of EDA to medicine through VHDL, taking pulse measurement as an example, to achieve the digital system to a variety of human physiology Intuitive and accurate measurement of activity and physiological response. 1 Experimental design 1.1 Discussion on the application of EDA technology in pulse measurement in medical teaching When introducing pulse measurement in clinical diagnosis and nursing, it is believed that the pulse can be easily felt on the radial artery beating outside the palm surface of the wrist. It can also measure the carotid artery in the neck or the femoral artery in the groin. The measurement method is to put the patient's arm in a comfortable position, and press the index finger, middle finger, and ring finger of the ring finger against the surface of the radial artery. The patient usually silent for a few minutes. Multiply the measured pulse rate by 2 to get the pulse rate of one minute, and the abnormal patient will measure one minute. The pulse of an adult is 60 to 80 beats per minute in a quiet state. If it is less than 60 times, it is bradycardia. But well-trained athletes sometimes have pulses below 60 times, which is a powerful performance of heart health. If it exceeds 100 times, it is tachycardia. When physically active or emotionally agitated, the pulse can temporarily increase, and the pulse also increases during fever. Generally, for every 1 ° C increase in body temperature, the pulse increases by 10 to 20 times. This method can only roughly calculate the pulse beat. If the VHDL language is used, the one-minute counting result can be visually and accurately seen through the seven-segment digital tubes in the EDA experiment box, and compared with the previous measurement results through the teaching methods of medical textbooks, thereby determining the correctness of the measurement Or not. 1.2 Design ideas The pulse signal is collected by the pulse sensor into the computer, and then used as an input signal, and this signal is used as a pulse signal, that is, like a clock signal, the counter starts counting when input, as described below a VHDL description of a decimal counter can be used to collect Pulse signal count. 1. 3 VHDL design process VHDL process design is shown in Figure 1. Now, suppliers of computer-aided engineering software have adopted the increasingly common hardware description language VHDL as their CAD or EDA software input and output standards. Among them, the comprehensive tool Max + PlusⅡ provided by ALTEKA has comprehensive logic design capabilities. , Synthesis, wiring to simulation, download are very convenient. 2 Design plan and result analysis VHDL language design decimal counter source program: After the program input is completed, after Compiler in Max + Plus II is compiled and passed, STImulator can be used for simulation to view the simulation results, as shown in Figure 2. The VHDL design of the seven-segment display decoder can also be added to display the counting result through the seven-segment digital tube scan of the experiment box. The simulation results are shown in Figure 3. code show as below: The schematic diagram of the final top-level file is shown in Figure 4. The top-level file design is shown in Figure 4. Through this file, decoding can be achieved. When downloaded to the EDA experiment box, the corresponding pulse rate can be read on the digital tube of the experiment box, as shown in Figure 5. 3 Conclusion VHDL is a new type of hardware description language developed with the continuous development of electronic technology to meet the requirements of circuit systemization and high integration. VHDL has a wide range of applications and plays an increasingly important role in chip and circuit system design. The EDA technology with VHDL as the core is applied in medicine, which can intuitively and accurately measure the human body's pulse, heartbeat, respiration and other physiological activities, as well as the physiological response to external stimuli. There is a broad development space in the medical field. With further exploration and Practice will definitely promote the development of medicine. Wuxi Juxingyao Trading Co., Ltd , https://www.juxingyao.com
The combination of VHDL language and medical content, in addition to pulse measurement, can also be applied to the measurement of heartbeat and respiration, etc., as well as the measurement of the physiological reaction time after the human body is stimulated by sound and light. Electronic automation design (EDA) and its related technologies have huge application prospects in the medical field, and need further research and exploration.