Design and Implementation of Temperature Alarm in Electronic Technology Practice

实际温度/℃	温度采样结果计算值/V	实际测量值/V	精度偏差/%
36	2.653	2.2592	14.844
38	2.801	2.3843	14.877
40	2.965	2.5295	14.688
42	3.111	2.6593	14.519
44	3.257	2.7931	14.243
46	3.405	2.9203	14.235
48	3.551	3.0632	13.737
50	3.696	3.1901	13.688

Table 2. [in Chinese]

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Table 2. [in Chinese]

元器件	位号	故障现象	故障模式分析	实验室故障原因分析
片式厚膜电阻器	R₅、R₇、R₁₉、R₂₁、R₂₃、R₂₅、R₂₈、R₂₉、R₃₀、R₃₁、R₃₂、R₃₃、R₃₄	常温条件下一直报警或者超过36 ℃不报警	开路	浪涌引起的损坏；焊接断裂；电阻硫化；过载损坏
片式厚膜电阻器	R₅、R₇、R₁₉、R₂₁、R₂₃、R₂₅、R₂₈、R₂₉、R₃₀、R₃₁、R₃₂、R₃₃、R₃₄	常温条件下一直报警或者超过36 ℃不报警	短路	焊接短路
多层磁介片式电容器	C₇、C₉、C₁₀、C₁₁、C₁₂	超过36 ℃报警断断续续	开路	热应力；浪涌电压过压失效；瞬时过流烧毁
多层磁介片式电容器	C₇、C₉、C₁₀、C₁₁、C₁₂	超过36 ℃报警断断续续	短路	热击穿；瞬时反向击穿；焊接短路
肖特基二极管	D6	U2B的输入信号异常时，损坏了运放	断路	正向过流或者反向过压击穿
LM2904芯片	U2	常温或者超过36 ℃均不报警	输出失效	焊点断裂
LM2904芯片	U2	常温或者超过36 ℃均不报警	短路	供电电源电压过大或者输入端的信号超过最大范围从而产生内部击穿；管脚焊接短路
R_PT100热电阻	J1	超过36 ℃不报警	检测失效	传感器失效

Table 3. [in Chinese]

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Table 3. [in Chinese]

实际温度/℃	温度采样结果计算值/V	实际测量值/V	精度偏差/%
36	1.8609	1.9543	5.0191
38	1.8974	1.9908	4.9225
40	1.9339	2.0273	4.8296
42	1.9704	2.0638	4.7402
44	2.0069	2.1003	4.6539
46	2.0438	2.1373	4.5748
48	2.0803	2.1738	4.4945
50	2.1168	2.2102	4.4123

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Qianqian JIANG, Ping WU, Yu GU, Dandan WANG, Lixin WANG. Design and Implementation of Temperature Alarm in Electronic Technology Practice[J]. Experiment Science and Technology, 2023, 21(5): 98

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Paper Information

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Received: Aug. 14, 2022

Accepted: --

Published Online: Nov. 28, 2023

The Author Email: Qianqian JIANG (jiangqianqian@hit.edu.cn)

DOI:10.12179/1672-4550.20220497

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology