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Implantable Multi-channel Temperature Measuring System with Batteryless Sensors.

带无电池传感器的植入式多通道温度测量系统。

基本信息

批准号：
62460138
负责人：
SAITOH Yoshiaki
金额：
$ 2.24万
依托单位：
Niigata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1987
资助国家：
日本
起止时间：
1987 至 1988
项目状态：
已结题

项目摘要

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.

本研究的目的是开发一种使用许多植入式传感器测量体内温度的系统。我们提出了两种类型的传感器：一种传感器从测点到皮肤下有引线，但它由一个具有温度依赖性的石英晶体和一个小尺寸的线圈（缩写为a型）组成。另一种类型的传感器没有引线，可以测量深层器官的温度，但它由几个体积稍大的部分组成（缩写为B型）。在A型的情况下，我们开发了新的系统，可以测量10点的温度。需要解决的问题有：石英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、链路线圈的构造以减少相互连接的误差。对测量值的再现性、电磁场引起的故障、数字电路对模拟电路的干扰等问题也提出了解决方案。我们系统的准确度在0.1 C以内。在B型的情况下，我们引入了参数化原理，开发了一种新的遥测系统。参数电路产生驱动能量一半频率的信号。我们成功地利用石英晶体在参数电路中实现了振荡，并将电路缩减到原电路的一半。三个不同频率的通道传感器在较窄的频率范围内工作良好，它们发出的信号通过无线电接收器相互识别。这一现象意味着新型植入式多通道温度测量的可能性。