Based on the ARM of pulse meter system design and implementation (1)

Summary: this article describes an approach based on ARM microprocessor pulse meter system that the S3C2410 embedded chip as a hardware platform.

And a detailed analysis based on uClinux software design of embedded operating systems. Practice has proved that the system effectively improves diagnostic accuracy and efficiency, low cost, high reliability, the advantages of simple operation.

1 Introduction

Pulse-bring a wealth of information on human health.

In traditional Chinese medicine, taking possession of a very important position. Due to the Chinese medicine is on your finger on the pulse of information obtained in the long-term medical practice has also revealed some shortcomings. Pulse diagnosis of qualitative and subjective greatly affects its precision and feasibility, Chinese medicine practitioners diagnose application and development of constraints. In order to promote the development and application of pulse diagnosis must be combined with modern technology to achieve a more scientific, objective diagnosis. With the rapid development of embedded technology, we developed a novel based on ARM920T processor pulse meter. It uses a high-speed processor ARM920T core S3C2410. The new pulse meter has a low cost, small size, high reliability and advantages of simple operation, suitable for individuals and small and medium-sized hospital pulse diagnosis purposes.

2 system design ideas

According to TCM theory of pulse diagnosis, from around the wrist, inch, off, foot three different severity may be informed of the pathological changes in human organs, the simulation process, the design of TCM pulse pulse meter.

Pulse meter schematic diagram shown in Figure 1.

Figure 1 schematic diagram for pulse meter

Strain gauge sensors are commonly used for pulse instrument of a kind of sensors.

Some solid materials subjected to external role, its resistance to change, such as stress the role of the material change in resistivity is known as piezoresistance effect. Semiconductor strain gauge measuring strain the principle is to semiconductor crystals of piezoresistance effect. This strain gauges made of sensor called a semiconductor strain gauge sensor. Sensor chart as shown in Figure 2, the up and down a semiconductor strain gauge.

Figure 2 sensor chart

The basic strain sensor components including: Gage, elastic components, measuring bridge.

This selection of cantilever-type pressure sensor, strain gages used semiconductor strain gauge.

3 system hardware module design

3.1 embedded processor choices

The system adopts the ARM920T as a communication system and PC.

The experiment box as shown in Figure 3.

Figure 3 ARM920T experiment box figure