Blood pressure simulation based SPCE061A generator design (1)

0 introduction

With the development of the society, people's health consciousness more and more strong, so the doctor training has become a very important link.

Although measuring blood pressure is a relatively simple technology, but if it does not regulate the blood pressure values compared with actual blood pressure also often occur error, cannot be objectively true reflection of the patient's blood pressure. Blood pressure measurement as part of the basic assessment of students, in the past by direct measurement of the human body, but the teacher does not know the circumstances of the blood pressure in the human body, at the same time measurement conditions and subject to the outside environment, so give assessment difficult. The system can be set to measure blood pressure, making the situation even more rich, so as to improve the blood pressure measurement technology of doctors. The blood pressure simulation generator is based on the KE Lo k technology (blood pressure measurement on the artery when stethoscope heard the sound of five phase) and the relevant provisions of modern medicine, in strict accordance with the rules of the pulse. Sound realistic, well, you can determine under different heart rate and blood pressure systolic pressure and the diastolic pressure, and other indicators that can be used in medical training institutions for training tools to enable students to quickly master the methods of measurement of blood pressure. The system pressure gauge with blood pressure arm, stethoscope, have broad market prospects.

This article describes the blood pressure simulation generator is to Sunplus 16 bit MCU core for control, SPCE061A leverages lingyang with powerful voice capabilities to realistic order play Ke Lo k tone, while enabling simulation of electromagnetic valve beat human pulse beating.

You can set the appropriate systolic, diastolic and auscultation interval with error correction, error value does not exceed 2 mmHg.

L system architecture and design

The system mainly includes SPCE061A Sunplus 16 bit MCU, sensor input module, solenoid valve drive modules, and voice playback module, LCD module, keyboard control, etc.

This system uses 16-bit MCU SPCE061A Sunplus as main control chip, the chip CPU clock O.32 ~ 9.152 MHz (2.6 ~ 3.6 V); built-in 2 KB SRAM and 32 KB FLASH; 32-bit programmable multifunction I/O ports; two 16-bit timer/counter, programmable audio processing; system standby (clock is stopped) power consumption of only 2 μ A; 7-channel 10-bit voltage-mode/number converter; dual-channel 10-bit DAC audio input feature, you only need an external power amplifier (SPY0030A) to complete the voice playback, convenient for system's voice function; 14 interrupt sources can come from A/B time base timer, 2 external clock source input; have to attack the wake-up function. In addition the single chip with its own integrated development environment that supports standard C language. You can implement in c and assembly language call each other, and provides voice playback library functions, so you can easily complete the voice playback, for software developers provides convenient conditions. Blood pressure analog generator overall system design as shown in Figure 1.

2 system hardware parts

This section is divided into parts, power SPCE061A system management module, electromagnetic valve actuation, the gas pressure sensor, speech output, LCD display, the keyboard setting.

System under the control of the microcontroller, the gas pressure sensors for pressure acquisition, and A/D converted to MCU, the measurement results are compared with preset values, the pulse beat sound playback. At the start of solenoid valve. System hardware connection diagram shown in Figure 2.