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本机是用来遥测被试者的多项生理参数和所处环境的一些物理参数的仪器。它可用于医学生理学的研究及某些场合的医务监督。系统采用 PDM—FM 调制形式,机内设有快变交换子和两个慢变交换子(即主、付交换子),配接相应的传感放大器,即可同时遥测六路心电、脑电、振动之类的快变信号和十三路呼吸、温度之类的慢变信号。发送端输入信号幅度为±50mv,解调器输出为±2.5v。慢变信道安插在帧同步脉冲的位置,以便能充份运用系统。为了提高系统的同步可靠性,在接收端采用了惯性帧同步电路和锁相环。此外,发射机载频采用声表面波调频振荡器,它具有频率较稳、频偏较大、频谱较纯的特点。系统均方根误差为±2%,遥测距离为100米。
The machine is used to telemetry subjects a number of physiological parameters and the environment of some of the physical parameters of the instrument. It can be used in medical physiology research and in some cases medical supervision. The system uses PDM-FM modulation form, the machine is equipped with fast changing exchange and two slow change exchange (ie, pay the exchange child), with the corresponding sense amplifier, you can telemetry six-way ECG, EEG , Vibration and the like rapid change signal and thirteen way breathing, temperature and the like slowly changing signal. Transmitter input signal amplitude of ± 50mv, demodulator output is ± 2.5v. The slow channel is placed at the location of the frame sync pulse so that the system can be fully utilized. In order to improve the system’s synchronization reliability, an inertial frame synchronization circuit and a phase-locked loop are adopted at the receiving end. In addition, the transmitter carrier frequency using surface acoustic wave frequency modulation oscillator, which has a more stable frequency, larger frequency, the pure spectrum of the characteristics. The root mean square error of the system is ± 2% and the telemetry distance is 100 meters.