发明名称 |
Self-calibrating hot wheel detector for railroads |
摘要 |
This invention relates to a device for monitoring the temperature of the wheels of passing railroad cars. More particularly, this device includes a self-calibration function wherein a predetermined heat source is attached to the device, a fixed amplifier amplifies the resulting electric signal so as to generate a signal comparable in magnitude to that generated by a passing train, a variable gain amplifier further amplifies the signal, and the resulting signal is converted to a digital signal. The digital signal is used as a signal to the feedback input of a variable gain amplifier. In response to the digital signal, the variable gain amplifier adjusts its gain until the feedback signal reaches a predetermined value.
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申请公布号 |
US5100243(A) |
申请公布日期 |
1992.03.31 |
申请号 |
US19900626204 |
申请日期 |
1990.12.12 |
申请人 |
SERVO CORPORATION OF AMERICA |
发明人 |
GROSSKOPF, GEORGE;SANVILLE, W. WOODWARD |
分类号 |
B61K9/06;G01J5/00;G01J5/56 |
主分类号 |
B61K9/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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