Implantable Multi-channel Temperature Measuring System with Batteryless Sensors.

本研究的目的是开发一个系统，该系统使用多种植入式传感器进行温度测量。我们提出了两种类型的传感器：一种类型的传感器引线从测量点到具有温度依赖性的石英晶体和具有小尺寸的线圈的皮肤粘滞常数（称为A型）。另一种传感器没有引线，并且可以测量一个深排风琴的温度，但它可能会测量一些带有较小体积的零件（如B型）。在A型的情况下，我们开发的新系统可以测量10点的温度。有许多问题可以解决，如四分之二晶体之间的频率间隔、所需的扫描频率范围、所需的扫描时间、所需的链接线圈的构造，以减少相互连接的错误。也可以找到这样的解决方案，如计量值的可再生性，对电磁场的正函数，以及对数字电路模拟电路的干扰。我们系统的准确性在0、1 ° C中。在B型的情况下，我们介绍了参数的原理，并开发了一个新的遥测系统。一个参数电路产生了一个半驱动能量频率的信号。We succeeded in making oscillation in the parametron circuit with quartz cr\and in reducing the circuit to onehalf of the original one。具有窄频率范围的不同频率的三个通道传感器工作良好，并且每个信号都被无线电接收器识别。这一现象意味着对新的、可移植的多通道温度测量的可能性。

The purpose of this study is to develop a system which measures temperaturein a body using many implantable sensors. We proposed two types of sensors: one type of sensor has a lead wire from measuring point to under the skin butit consists of a quartz crystal with temperature dependency and a coil with small size (abbreviated as type A). Another type of sensor has no lead wire and can measure temperature of a deep seated organ but it consists of several parts with a little larger volume (abbreviated as type B).In the case of type A we developed the new system which can measure the temperature of 10 points. There are many problems to be solved such as frequency interval between quartz crystals, required scan frequency range, required scantime, construction of link coils to reduce error of mutual connection. Also wefound the solutions to the problems such as reproducibility of measured values, malfunction due to electromagnetic field, interference to the analog circuits from digital circuits. The accuracy of our system is within 0,1゜C.In the case of type B we introdued the principle of parametron and we developed a new telemeter system. A parametron circuit produces a signal of onehalf the frequency of driving energy. We succeeded in making oscillation inthe parametron circuit with quartz crystal and in reducing the circuit to onehalf of the original one. Three channel sensors of different frequency withnarrow frequency range worked well and the signals from them were identified each other by a radio receiver. This phenomenon means the possibility of the new implantable multi-channel temperature measurement.