Rotation speed signal processing circuit of engine
A signal processing circuit and engine speed technology, applied in the direction of the device using the electric/magnetic method, can solve the problem of low sensitivity of the engine speed processing circuit, the difficulty of the engine speed processing circuit to accurately and effectively detect various speed data, and the inconsistency of the speed signal It is easy to catch and other problems, and achieve the effect of shortening the start-up time, improving sensitivity and reducing exhaust emissions
Active Publication Date: 2012-08-08
力帆科技(集团)股份有限公司
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Problems solved by technology
[0010] However, the larger the ratio of the sixth resistor to the fourth resistor, the larger the ratio of the seventh resistor to the fifth resistor, the lower the sensitivity of the engine speed processing circuit, and the less likely the speed signal is captured
[0011] The disadvantage of the prior art is: due to the fixed parameter configuration, it is difficult for the engine speed processing circuit to accurately and effectively detect various speed data from engine startup to high-speed operation.
Method used
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[0047] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
[0048] Such as figure 2 , 3 As shown, an engine speed signal processing circuit includes a first speed acquisition terminal A and a second speed acquisition terminal B;
[0049] The first rotational speed acquisition terminal A is connected in series with the eighth resistor R8, and then connected to the negative input terminal of the comparator U1 through the eighteenth resistor R18;
[0050] The second speed acquisition terminal B is connected in series with the seventeenth resistor R17, and then connected to the positive input terminal of the comparator U1 through the nineteenth resistor R19;
[0051] And the resistance value of the eighth resistor R8 is equal to the resistance value of the seventeenth resistor R17, and the resistance value of the eighteenth resistor R18 is equal to the resistance value of the nineteenth resistor R19;
[0052] A twenti...
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The invention discloses a rotation speed signal processing circuit of an engine. The rotation speed signal processing circuit comprises a first rotation speed acquisition end A and a second rotation speed acquisition end B, wherein the first rotation speed acquisition end A is connected with the negative input end of a comparator after being connected with an eighth resistor and an eighteenth resistor in series; the second rotation speed collection B is connected with the positive input end of the comparator after being connected with a seventeenth resistor and a nineteenth resistor in series; and the output end of the comparator is connected with a micro control unit (MCU). The rotation speed signal processing circuit is characterized in that: a common end of the eighth resistor and the eighteenth resistor is connected with a first input end group of a multiplexer after being connected with a first divider resistor group in series; a common end of the seventeenth resistor and the nineteenth resistor is connected with a second input end group of a multiplexer after being connected with a second divider resistor group in series; a power supply end of the multiplexer is connected with a constant-voltage power supply; and a channel selection end of the multiplexer is connected with the MCU. The rotation speed signal processing circuit has the advantage that various rotation speeddata of the engine can be accurately and effectively detected in the period from start to high-speed operation.
Description
technical field [0001] The invention belongs to an engine speed detection technology, in particular to a processing method for a motorcycle engine speed signal processing circuit. Background technique [0002] Such as figure 1 As shown, the current engine speed processing circuit includes a first speed acquisition terminal A and a second speed acquisition terminal B; [0003] After the first rotational speed acquisition terminal A is connected in series with the sixth resistor, it is then connected to the negative input terminal of the comparator through the second resistor, and the common terminal of the sixth resistor and the second resistor is connected in series with the fourth resistor and then connected to a regulated direct current ; [0004] The second rotational speed acquisition terminal B is connected in series with the seventh resistor, and then connected to the positive input terminal of the comparator through the third resistor; the common terminal of the sev...
Claims
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IPC IPC(8): G01P3/44
Inventor 马文选周向东曾伟
Owner 力帆科技(集团)股份有限公司