Severe ambulance first aid Intelligent Assistant system design and implementation (1)

Summary: first aid support system based on EC5-1719CLDNA high performance single board computer, adding human life with monitoring sensor, audio/video module, wireless transmission module, database and application software, as well as ECG monitoring equipment, implementation of a human life with the real-time collection and monitoring, licensure, condition for rapid diagnosis, suspect cases queries, remote expert emergency, ECG analysis and other functions.

Use this system in pre-hospital emergency link for quick diagnosis in patients with the illness and guidance in first aid, effectively reducing patient mortality and disability rates.

0 introduction

For accident and sudden illness, disease, there is a first aid "time window", if you can link the rapid diagnosis of pre-hospital care and giving effective first aid to a large extent able to reduce the mortality and disability rates.

However, due to objective conditions, medical ambulance mobile medical teams are difficult with experienced specialists, thus not taking the most timely and effective measures, or missed the best salvage opportunity [1].

In response to the above questions, this article uses EC5-1719CLDNA (embedded star) is the system kernel, combined with human life with monitoring sensor, audio/video module, TD-SCDMA Wireless transmission module, GPS module implements the ambulance first aid Intelligent Assistant system provides an effective solution.

1 system design and implementation

System by the end of the ambulance and emergency Center is made up of two parts, the two sides through TD-SCDMA Wireless module for data communication.

Ambulance-mainly on the patient's physiological characteristics (temperature, pulse, respiration, blood pressure) in the acquisition, analysis of patient's ECG, and acquisition of data in real time through the wireless module to the rescue centre-for convenient Centre for patients to make comprehensive remote diagnosis.

Medical Center-is responsible for the management and provisioning of ambulance, receive the ambulance sent live life with data and preliminary diagnostic results, and through real-time audio and video communication for emergency Center experts offer data, images, and other diagnostic reference to guide the ambulance implement more effective treatment options.

The entire system block diagram shown in Figure 1.

Figure 1 severe ambulances assisted system framework

Ambulance-end use EC5-1719CLDNA (embedded star) high performance single board computer, using the integrated sensor for pulse, temperature, respiration signal for real-time acquisition and processing and transport.

Design diagram shown in Figure 2.

Figure 2 ambulances-function system structure

The ambulance-end can be divided into four modules: completed patient physiological characteristics collected data acquisition modules; complete patient data analysis revealed that the interactive modules; completed and centre of wireless modules; complete with Center video conversation sound image processing module.

Which data acquisition module is a key part of the entire system, collecting the resulting signal from 16-bit σ-Δ die/number converter AD7705 realization, the chip contains a digital filter, thus eliminating a separate filter circuit, at the same time achieve a very good filter effects.

The control consists of two pieces of single-chip control, capture the signal sent to the master system for analytical processing.

As this system moves the ambulance is on the Center side in and interact, in the Center side is configured with a wireless card to receive the data of the ambulance Terminal, the present system in the ambulance Terminal also uses the branch of the GPS module snec (nominal positioning accuracy of 10 m), through GPS Terminal from satellite to local GPS coordinates, depending on the location of the information, help the ambulance and emergency Center-Learn about the current position of the ambulance.

Similarly, in moving transfer audio and video is better than a rest place high demands, this system uses a socket (Socket) technology, wirelessly for audio and video data transmission.

At the same time in order to reduce the network traffic is not good cause a backlog of data, the data cannot be sent, the sender uses the system to stop, strategy, that is, each time you send the data back to listen on the receiving end, set the flags to determine whether to stop the compression of the video frame. At the receiving end, after receiving the video frame, send to the sender, the flags on the receiving end start compression, data transmitted to the next frame. Thus, when a network exception, since the cessation of compression, so that it will not cause a backlog of data.

2 system test

2.1 pulse module test

For the same users, use the pulse sensor HK-2000B oscilloscope measurement signal waveform, and the system system output waveform.

Waveform as in Figure 3, Figure 4 shows.

Figure 3 oscilloscope output pulse waveform

Figure 4 the system output waveform