An instrument for the accurate measurement of Tympanic temperature without physical contact by use of infrared optic fibers.

本研究的目的是设计一种常规的无物理接触鼓室温度精确测量装置，用于探索高温潮湿环境下人类大脑选择性冷却的机制。1. 设计一种红外线鼓室温度测量装置。该装置检测鼓膜发出的红外线，这与鼓膜温度直接相关。我们首先尝试建立一个使用红外光纤的设备，红外线将被放置在耳道外的传感器收集和检测。但该装置即使是管内温度的微小变化也会对其产生很大的影响，因此我们对该装置进行了废弃和修改。新设计的装置包括：(1)红外传感器；(2)由56对热电偶组成的精密热电堆；B.外支架和c.保护罩。2. 设备的有效性。实验在体外重复使用…更多的皮肤模型和人类受试者的实际鼓膜测试证实，该装置具有快速的响应时间，能够在几秒钟内达到最大值的95%。然而，随着鼓膜与温度传感器距离的变化，输出的信号量也会发生变化。3. 与接触式温度计比较。两侧鼓室的温度被测量，一个用这个装置，另一个用直接接触鼓室膜的热敏电阻。在没有任何可检测风的热中性环境温度下，两个装置测量的值之间有很好的相关性。当脸在温暖的条件下被扇扇时。然而,这。与接触装置记录的值相比，装置指示的值较低。因此，我们得出结论，在目前的形式下，设计的温度传感器可能还不能在头部周围的空气温度变化很大的情况下使用，在实际使用之前需要进一步修改。少

The purpose of this study was to design a conventional device for accurate measurement of tympanic temperature without physical'contact, with which one can explores mechanisms of selective brain cooling of the humans exposed to hot-humid environments. 1. Designing an infrared device for tympanic temperature measurement. This device detects infrared ray emitted from the tympanic membrane, which is directly related to the tympanic temperature. We have first attempted to build a device using infrared optic fibers with which the infrared ray will be collected and detected by the sensor located outside the auditory canal. However, this device was greatly influenced even by a small change of canal temperature, then we have discarded and revised the device. The newly designed device consisted of (1) infrared sensor, a. a fine thermopile consisted of 56 pairs of thermocouples. b. outer holder and c. protecting cover. 2. Validity of the device. Tests were repeated in vitro using a model of the … More skin and using actual tympanic membrane of human subjects. The tests confirmed that the device has a rapid response time and was able to reach a 95% of the maximum value within several seconds. However, the amount of output signals varied if the distance of tympanic membrane and the temperature sensor changed. 3. Comparison with a contact thermometer. Tympanic temperatures in both sides were measured, one by this device and another by a thermistor of direct contact with the tympanic membrane. There was a good correlation between the values measured by the two devices at a thermoneutral ambient temperature without any detectable wind. When the face was fanned in a warm condition. however, this. device indicated'lower values compared with those recorded by the contact device. We thus conclude that in its current form the designed temperature sensor may not yet be used under the conditions where air temperature around the head changes to a great extent, and a further revision will be needed before actual use. Less