Embedded CPU cards in medical portable application monitors

Design of a portable monitor for medical purposes, in addition to the use of smaller, lighter and meet quality support LCD CPU card, ambulance bumpy, portable run-time of vibration is design engineers must take account of the problem.

This article will explore the use of embedded CPU cards design medical portable monitor for specific programmes.

Software platform:

DOS operating system, application software.

Hardware platform:

AC-DC dual power supply, battery, mini printer, ECG collection module, oxygen acquisition module, such as blood pressure acquisition module, multiple serial expansion cards, TTL interface LCD screen (resolution 800 * 600 or 640 * 480), embedded CPU control card.

1. the software's functionality is not fine, rough concept is application software in DOS, on the basis of the various collection sent by CPU instructions, by serial cards to individual acquisition module, collecting human signal, the signal will be collected using various algorithms change into various that we can identify the information displayed on the LCD monitor, and then there is the realization and central monitoring data communication between many serial communication are mostly use motherboard serial port 1 or 2.

2. the hardware platform of choice and this choice causes

Power supply: 12V DC is because ambulances, and ward rooms usually only is 220V AC, outdoors and hospital corridors implemented with battery, power supply design of monitors both AC and DC and low-power batteries.

Acquisition module: is used to measure various parameters of the human body, including ECG collection module, oxygen acquisition module, blood sampling module are usually carried out through the serial port.

Serial expansion cards: PC104 Board (PCM-3486) programme, it is necessary to use PC/104 + serial card for capturing more body parameters.

LCD monitor small light weight to portable, ordinary monitor what we know.

Now we talk about the CPU card, on which we have already said we need portable to portable we used the LCD, so we need to use a smaller, lighter and meet quality support LCD CPU card that makes us think of the PC/104 boards and, of course, simple just small cannot meet this need, the ambulance's bumpy, portable run-time of vibration is the issue we must consider, at this time we need a very high level of integration.

Furthermore a number of occasions (outdoor, hospital corridors) we can only use the battery, the battery power is limited, so we must consider the power consumption of CPU cards can not be too high, the low-power PCM3486 CPU can guarantee medical organizations required to only use batteries of the functional requirements of the 2 hours — "very satisfied". PCM3486 onboard electronic hard drive with small light weight, anti-vibration, read and write times long, low-power characteristics, not the problem. LCD display aspects due to supply difficulties occur often replace the model of the problem, of course, the color range of true color, PCM3486 can support more than 98% of 800 * 600 resolution in the following (with 800 * 600) true color LCD compatibility class, a good solution to the supplier. As for mini printer it and ordinary printer in addition to the appearance of the size of other usage difference is not large, compatibility is good and the mouth. Monitoring software is a high demand for real-time software system, when the argument is more (Basic 6 parameters include ECG, blood pressure, SpO2, pulse, temperature, breathing. More means in addition to the Basic 6 parameters other than those of additional parameters such as the lungs of CO2 concentration measurement) LCD display resolution at 800 * 600, in order to better reflect the real-time performance, use of the software is relatively fast 486-class Board PCM3486 can achieve the best results. Some may say SCM cheap, low power consumption also made small Board why not here, obviously this Yes but then support the LCD, in handling complex algorithms, real-time programs, barely achieving monitoring function is difficult to present the perfect application. On the contrary this price PCM3486 first-class products to ensure that you use on the basis of the more you use of Jello.

3. specific practices

Everything installed can, CPU card connected LCD monitor, printer, power supply and battery, the installer to the hard drive in electron, embedded CPU module bus connections on multiple serial cards, multiple serial cards connect various acquisition modules.

Power OK!