Detection circuitry of airport LED lamps and lanterns
The utility model relates to a detection circuitry of airport LED lamps and lanterns, by the LED return circuit, single operational amplifier, resistance is enlargied to R1, R2, R3, four difference of R4 and CPU constitutes, its characterized in that: select two signaling points from the LED return...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The utility model relates to a detection circuitry of airport LED lamps and lanterns, by the LED return circuit, single operational amplifier, resistance is enlargied to R1, R2, R3, four difference of R4 and CPU constitutes, its characterized in that: select two signaling points from the LED return circuit, the differential amplification circuit that resistance constitutes is enlargied by single operational amplifier and difference to the input, and the short circuit of opening of LED light source is judged to the value that reads output voltage through CPU to this accomplishes the detection to the LED lamps and lanterns. The advantage is: 1, realize minimum list fortune put detect LED open short circuit, reduction in production cost, 2, CPU only needs as to this single fortune to put capable sampling analysis into, and the more CPU IO mouths of release more improve detection circuitry's reliability.
本实用新型种机场LED灯具的检测电路，由LED回路，单个运算放大器，R1、R2、R3、R4四个差分放大电阻和CPU构成，其特征在于：从LED回路选取两信号点，输入由单个运算放大器及差分放大电阻所构成的差分放大电路，通过C |
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