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www.betway883.com如何检测?

时间:2017-11-09 10:19?? 编辑:济南仁硕电子科技有限企业 点击:

  湿敏电阻和湿敏电容是最简略的湿度传感器元件。跟着科技的展开前进,工业、农业、科研、厂房、仓库、气候、机房、暖通空调、医疗、家电等等越来越多的领域和场所需求用到湿度传感器,对湿度传感器的要求也越来越高。那么怎样运用好湿度传感器以及怎样进行湿度传感器的检测关于大多数用户来说仍是一件较为抽象凌乱的作业。下面简略先容一下湿度传感器的检测方法,希望对大家有所帮忙。

  现在市面上常用的湿敏元件通常是电阻式和电容式的湿敏电阻和湿敏电容,湿敏电阻是在导电电极陶瓷衬底涂敷一层高分子感湿膜,与空气中相对湿度改动导致电阻系数改动原理,其特色为精度高,稳定性好,照应快,互换性较湿敏电阻差些。湿敏电容首要选用高分子薄膜电容制成,当环境相对湿度发生改动时,湿敏电容的介电常数发生改动,电容改动量与相对湿度成正比关系。产品首要特色互换性好,高灵敏度,照应速度快,湿滞小,线性度好,精度相对湿敏电阻要低一些。因湿敏元件的线性度与抗污染性较差,在进行湿度传感器检测时,一般就避免触碰感湿元件,以防污染及划伤感湿膜,焊接时温度不能过高(小于180℃,2S膜表面),尽量避免盐雾、二氧化硫、盐酸、强碱、有机溶剂(酒精,丙酮等)等具有强氧化气体的环境中运用,湿敏元件不宜长期暴露在待测环境中,易被污染而影响其丈量精度和产品的长期稳定性。

  在进行开端的功用检测时,大家可以通过一些比较简练的检验方法,如进行一致性判别时,同一厂家、同一产品类型的湿度传感器最好一次性用两只或两只以上放在一起通电比较检测(一般需在焊接8-12小时今后进行检验,前进准确值)所输出的数值,在相对稳定的检验环境中调查产品的一致性,也可在必定时间内分段检验调查,比较全面的观测产品的稳定性和一致性;也可用呵气或其他加湿的环境对传感器进行加湿,调查湿度传感器的灵敏性及凹凸量程;产品精度毕竟需依据正规完备的检测方法,包含恒温怛湿环境,产品标定环境,电路编写程序等,还应在长期运用过程中对产品的长期标定才干比较全面的判别湿度传感器的产品质量。

  胜群科技专业供应湿敏电阻、湿度传感器、www.betway883.com、温湿度模块、湿度模块、温湿度控制外表、热敏电阻、温度传感器、美国高精度湿度传感器、温湿度一体模块等!

  Humidity sensitive resistor and humidity sensitive capacitance are the simplest elements of humidity sensor. Along with the development of science and technology progress, industry, agriculture, scientific research, workshop, warehouse, climate, room, HVAC, medical appliances and so on, more and more areas and places needs to use the humidity sensor for humidity sensor are increasingly high requirements. So how to use a good humidity sensor and how to detect humidity sensor, for most users, is still a more abstract messy work. The following brief introduction of humidity sensor testing methods, we hope to help.

  Now the commonly used humidity sensor is usually resistive and capacitive humidity sensitive resistor and a capacitive humidity sensor, humidity resistance is the wet film on the conductive electrode ceramic substrate coated with a layer of polymer, and the relative humidity in the air resistance coefficient changes resulting from changes principle, its characteristic is high precision, good stability, fast. Interchangeability is moisture sensitive resistance, poor. The humidity sensing capacitor is mainly made of polymer film capacitor. When the relative humidity of the environment changes, the dielectric constant of the humidity sensing capacitor is changed, and the capacitance change is directly proportional to the relative humidity. The primary characteristic of the product is good interchangeability, high sensitivity, fast speed of reference, little wet hysteresis, good linearity, and low precision relative humidity sensitive resistance. Because of the humidity sensor linearity and poor anti pollution, in humidity detection, generally avoid touching the humidity sensing element, to prevent pollution and sad wet film, the welding temperature is not too high (less than 180 DEG C, the surface of the 2S film), try to avoid salt fog, sulfur dioxide, hydrochloric acid, alkali, organic the solvent (ethanol, acetone) by strong oxidizing gas, humidity sensitive element in the environment should not be measured in long term exposure, susceptible to pollution and affect the long-term stability of the measuring accuracy and products.

  At the beginning of the function test, we can through some more concise test methods, such as consistency judgment, the same manufacturer, the same product type humidity sensor with the best one two or more together through the comparison of electric detection (the exact value usually takes 8-12 hours in advance in the welding test.) numerical output of the consistency of the survey products in relatively stable test environment, also can be in a certain time segment inspection survey, a comprehensive observation of stability and consistency of products; also available gas or other environmental humidification to humidify the sensor, humidity sensor and bump sensitivity investigation range; accuracy after all, according to the detection method of regular complete, but contains a constant temperature and humidity environment, product calibration environment, circuit programming, but also in the long-term use In the process of product calibration for a long time to identify the quality of humidity sensor product quality.

  Holteck technology professional supply humidity resistance, humidity sensor, temperature and humidity, temperature and humidity sensor module, humidity module, temperature and humidity control appearance, thermistor, temperature sensor, humidity sensor, the high precision temperature and humidity integrated module etc.!

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