Improved switch signal acquisition method
A technology of switching signals and acquisition methods, applied in impedance networks, electrical components, multi-terminal pair networks, etc., can solve problems such as short circuit burnout and short circuit burnout of lines, and achieve the effect of ensuring safety.
Inactive Publication Date: 2018-01-09
WUXI INST OF COMMERCE
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Problems solved by technology
For example, if the line between the power supply and the switch is grounded, the line will be short-circuited and burned; if the line between the switch and the control unit is grounded, the line will also be short-circuited and burned when the switch is closed.
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Embodiment Construction
[0011] figure 2 As shown, it involves an improved method for collecting switching signals, including the following steps:
[0012] 1) When the control unit is working normally, the signal voltage when the switch is off is 12V, and the signal voltage when the switch is closed is a value between 0-12V; the specific value is related to the values of resistors R1 and R2.
[0013] 2) When there is an open circuit between the first terminal of the control unit and the second terminal of the control unit via the switch, the signal voltage is always 0V regardless of the working state of the switch;
[0014] 3) When the line from the first terminal of the control unit to the second terminal of the control unit is grounded through the switch, no matter what the working state of the switch is, the signal voltage is always 0V.
[0015] The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications,...
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The invention discloses an improved switch signal acquisition method. The improved switch signal acquisition method comprises the steps that: when a control unit normally works, the signal voltage when a switch is off is 12 V; the signal voltage when the switch is on is a certain value between 0-12 V; when a circuit between the first terminal of the control unit and the second terminal of the control unit through the switch is broken, no matter the switch is in any working state, the signal voltage is always 0 V; and, when the circuit between the first terminal of the control unit and the second terminal of the control unit through the switch is bonded, no matter the switch is in any working state, the signal voltage is always 0 V. According to the improved switch signal acquisition methoddisclosed by the invention, when the circuit between the first terminal of the control unit and the second terminal of the control unit is bonded, the signal voltage is different from the signal voltage when normal working is carried out; at this time, the control unit can give an alarm in the manners of a fault indicating lamp and a fault code; and thus, a maintainer is reminded to maintain in time.
Description
technical field [0001] The invention relates to an improved method for collecting switch signals. Background technique [0002] Traditional switch signal acquisition methods such as figure 1 As shown, in normal operation, the signal voltage when the switch is open is 0V, and the signal voltage when the switch is closed is 12V. For example, if the line between the power supply and the switch is grounded, the line will be short-circuited and burned; if the line between the switch and the control unit is grounded, the line will also be short-circuited and burned when the switch is closed. If there is an open circuit between the power supply and the control unit, the signal voltage is always 0V no matter what the switch is in. Contents of the invention [0003] The object of the present invention is to provide an improved method for collecting switch signals aiming at the defects in the prior art. [0004] In order to achieve the above object, the present invention adopts t...
Claims
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IPC IPC(8): H03H7/38
Inventor 龚文资
Owner WUXI INST OF COMMERCE