A method for determining the resistance value of the internal threshold resistance of an ion flame signal detection device by simulating a flame signal
A technology of ion flame and signal detection, applied in measuring devices, measuring electrical variables, measuring current/voltage, etc., can solve the problems of threshold value error, unable to produce continuous adjustment, etc., to improve adjustment accuracy, shorten debugging and testing The effect of man-hours, reduction of product processing and testing costs
Active Publication Date: 2021-02-26
SHAANXI AVIATION ELECTRICAL
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[0007] In order to solve the problem that the existing technology cannot produce a continuously adjustable standard flame field, simulate the flame field of the engine combustion chamber, and adjust the threshold value error of the ion flame signal detection device, the present invention provides a method for determining the ion flame Method for the resistance value of the internal threshold resistance of the signal detection device
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[0020] Embodiments of the present invention are described in detail below, and the embodiments are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.
[0021] A method for determining the resistance value of the internal threshold resistance of the ion flame signal detection device by simulating the flame signal in this embodiment comprises the following steps:
[0022] Step 1: If figure 1 As shown, the diode, the continuously adjustable current-limiting resistor and the ammeter are connected in series to the output terminal of the ion flame signal detection device, wherein the positive pole of the series circuit is connected to the first output terminal of the signal control box of the ion flame signal detection device, and the connection of the series circuit The negative pole is connected to the second output end of the signal control box of the ion flame signal detection device; the first output end is th...
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The invention provides a method for determining the voltage limit resistance value in the ion flame signal detection device by simulating the flame signal. The unidirectional conduction characteristicof the flame field is simulated through a diode, a continuous adjustable current-limiting resistor is adopted to obtain simulated flame field ion current, and an ampere meter detection loop is adopted to simulate a flame field ion current value; the one-way current of the flame field is simulated, so that a continuously adjustable standard flame field does not need to be provided in the process of debugging the threshold value of the ion flame signal detection device, the threshold value adjusting precision of the door is improved, the test conditions of the combustion chamber of the engine do not need to be simulated in the acceptance test process, the debugging and testing time is shortened, and the product processing and testing cost is reduced.
Description
technical field [0001] The invention belongs to the technical field of aircraft engine ignition, in particular to a method for determining the resistance value of an internal threshold resistance of an ion flame signal detection device by simulating a flame signal. Background technique [0002] The ion flame signal detection device is used to detect the ion current in the flame field of the engine combustion chamber. By judging whether the ion current value exceeds the threshold value, a flame signal and a no fire signal are given. The ion flame signal detection device includes a signal control box, an ion flame detector as a central electrode, and an ion flame detector connected with the engine casing. [0003] The ion flame signal detection device determines the threshold value through the threshold resistance resistance in the internal circuit of the signal control box, so accurately determining the internal threshold resistance resistance of the ion flame signal detectio...
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IPC IPC(8): G01M15/00G01R19/00
CPCA62C37/50
Inventor 梁杰杨水银何海文陈钢锋李新虎
Owner SHAANXI AVIATION ELECTRICAL