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在医院、实验室、仓库等需要进行环境温度控制的场合,以往的取样控制大多采用线性变化方式,其成本较高,转换过程中需用模/数转换,抗干扰性能较差。为避免出观这类情况,我们运用三端可调电流源LM334,压频(V/F)转换器LM331和模拟开关4052与8031一起组成微机化T/F转换器来进行温度检测和控制.效果很好、现介绍如下:
Where hospitals, laboratories, warehouses, etc. need to control the ambient temperature, the sampling control methods in the past mostly adopt the linear variation method, which has a higher cost. In the conversion process, the A / D conversion is required, and the anti-interference performance is poor. To avoid this kind of situation, we use three-terminal adjustable current source LM334, V / F converter LM331 and analog switches 4052 and 8031 together to form a microcomputer T / F converter for temperature detection and control. Good effect, are described below: