Rotation speed signal processing circuit of engine

Abstract

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 speed data 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] like 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 sevent...

AI Technical Summary

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.

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