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温湿度和温湿度传感器是啥

时间:2017-11-28 10:05   作者:济南仁硕电子科技有限公司 点击:

  温湿度是与人们的生活休戚相关的,温湿度的改变极易使人们的健康受到影响,温湿度传感器在于其他仪器的合作运用中可以对温湿度进行操控从而使人们的生活环境更健康,下面我们来了解一下这方面的常识。

  跟着年代的开展,科研、农业、暖通、机房、航空航天、电力等工业部门,越来越需求选用温湿度传感器,对产品质量的要求越业越高,对环境温、湿度的操控以及对工业资料水份值的监测与剖析都已成为比较遍及的技能条件之一。

  温湿度传感器的温度系数是湿敏元件除对环境湿度灵敏外,对温度亦非常灵敏,其温度系数一般在0.2~0.8%RH/℃规模内,而且有的湿敏元件在不同的相对湿度下,其温度系数又有差别。温漂非线性,这需求在电路上加温度补偿式。选用单片机软件补偿,或无温度补偿的湿度传感器是确保不了全温规模的精度的,湿度传感器温漂曲线的线性化直接影响到补偿的作用,非线性的温漂往往补偿不出较好的作用,只要选用硬件温度跟从性补偿才会取得实在的补偿作用。温湿度传感器作业的温度规模也是重要参数。大都湿敏元件难以在40℃以上正常作业。

  温湿度传感器的供电是金属氧化物陶瓷,高分子聚合物和氯化锂等湿敏资料施加直流电压时,会导致功能改变,甚至失效,所以这类温湿度传感器不能用直流电压或有直流成份的沟通电压。有必要是沟通电供电。

  温度标定往往用一根规范温度计作规范即可,而湿度的标定规范较难完成,干湿球温度计和一些常见的指针式湿度计是不能用来作标定的,精度无法确保,因其要求环境条件非常严厉,一般状况,在缺乏完善的检定设备时,通常用简略的饱和盐溶液检定法,并丈量其温度。

  Temperature and humidity are people living with the change of temperature and humidity bound together in a common cause, is very easy to make people's health is affected by temperature and humidity sensor is used, cooperation of other instruments can control the temperature and humidity so as to make people's life more healthy environment, let's look at this knowledge.

  Along with the time development, scientific research, agriculture, HVAC, computer room, aerospace, electric power and other industries, more and more demand for the temperature and humidity sensor, the requirements on product quality is higher and higher, the environment temperature and humidity control of industrial data monitoring and analysis of the value of water has become one of the more common technical condition.

  The temperature coefficient of temperature and humidity sensor is sensitive to humidity. It is also very sensitive to temperature. Its temperature coefficient is generally within the range of 0.2~0.8%RH/ C, and some humidity sensors have different temperature coefficients under different relative humidity. The temperature drift is nonlinear, which is required to add the temperature compensation to the circuit. Single chip software compensation, or without temperature compensation for humidity sensor is to ensure that not all temperature scale precision, linear humidity sensor temperature drift curve directly affects the function of compensation, nonlinear temperature drift compensation is not often a good role, as long as the choice of hardware temperature compensation compensation will be made to follow it. The temperature and humidity sensor is also an important parameter. Most of the humidity sensing elements are difficult to operate normally above 40 degrees C.

  The power supply of temperature and humidity sensor is metal oxide ceramics, polymer and lithium chloride and other humidity sensitive materials. When DC voltage is applied, it will lead to functional change or even failure. Therefore, such temperature and humidity sensors can not use DC voltage or DC component communication voltage. It is necessary to communicate electric power.

  The temperature calibration with a single standard thermometer for specification can, while the calibration specification of humidity is difficult to complete, psychrometer and some common pointer type humidometer is not used for calibration, to ensure accuracy, because of its environmental condition is very severe, the general situation, in the absence of perfect calibration equipment, usually with determination of saturated salt solution and the temperature measurement are given.

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