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Vehicle speed input collection circuit

A technology for collecting circuits and vehicle speed, which is applied in pulse shaping and other directions, and can solve problems such as poor compatibility

Active Publication Date: 2014-06-04
AEROSPACE HI TECH HLDG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is to solve the problem that the existing vehicle speed acquisition circuit adopts triode base-driven acquisition and needs to match the high and low level range of the signal, resulting in poor compatibility

Method used

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  • Vehicle speed input collection circuit

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specific Embodiment approach 1

[0012] Specific implementation mode one: refer to figure 1 Specifically explain this embodiment, the vehicle speed input acquisition circuit described in this embodiment, it includes input No. 1 diode D611, filter circuit, voltage stabilizing circuit and adjustment circuit,

[0013] The filter circuit includes a resistor R607, a capacitor C606, a resistor R620, a capacitor C604 and a second diode D606,

[0014] The cathode of the first input diode D611 is used as the vehicle speed signal acquisition terminal, and the anode of the first input diode D611 is connected to one end of the resistor R607, one end of the capacitor C606 and one end of the resistor R620 at the same time, and the other end of the capacitor C606 is connected to the power supply Ground, the other end of the resistor R607 is connected to the positive pole +12V of the 12V power supply, the other end of the resistor R620 is connected to one end of the capacitor C604 and the anode of the second diode D606, and ...

specific Embodiment approach 2

[0017] Embodiment 2: The difference between this embodiment and the vehicle speed input acquisition circuit described in Embodiment 1 is that it also includes a resistor R618, one of the resistors R618 is connected to the output terminal of the operational amplifier U601B, and the other of the resistor R618 is One end is connected to the positive pole +5V of the 5V power supply.

[0018] In this embodiment, in order to adjust the amplitude of the square wave output by the operational amplifier, a pull-up resistor R618 is added to the output terminal of the operational amplifier to connect to the positive pole +5V of the 5V power supply.

[0019] Working principle: the direction of the reverse input terminal of the operational amplifier, and the reverse series diode D611 at the input terminal of the vehicle speed signal is used to shield the influence of external interference signals on the system. Connect the positive pole to the ground with the filter capacitor C606 to filter...

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Abstract

The invention provides a vehicle speed input collection circuit, and belongs to the field of vehicle speed collection. The vehicle speed input collection circuit aims to solve the problems that an existing vehicle speed collection circuit adopts a triode base drive mode for collection, high and low level ranges of signals need to be matched, and compatibility is poor. The vehicle speed signal input end is in serial connection with a diode D611 in a reversed mode so as to shield influences caused by outside interference signals on a system, then vehicle speed signals are filtered through a filter circuit to obtain pure vehicle speed signals, the vehicle speed signals pass a stabilizing circuit, voltage of the vehicle speed signals is stabilized to be +8.2V, then the signals are connected with a negative input end of an operational amplifier in a conditioning circuit, a positive input end of the operational amplifier adjusts the input range of pulse recognition, and accordingly the vehicle speed input collection circuit is compatible with different vehicle speed signals. The vehicle speed input collection circuit can be used for collecting vehicle speed.

Description

technical field [0001] The invention relates to a vehicle speed input acquisition circuit. It belongs to the field of speed collection. Background technique [0002] At present, most pulse-type speed acquisition adopts the triode base drive method, which needs to match the range of high and low levels of the signal, and has poor compatibility with different vehicle speed signals, and also requires the input pulse signal to have a certain driving ability. Contents of the invention [0003] The invention aims to solve the problem that the existing vehicle speed acquisition circuit adopts triode base-driven acquisition and needs to match the high and low level ranges of signals, resulting in poor compatibility. And put forward the speed input acquisition circuit. [0004] Vehicle speed input acquisition circuit, which includes input diode D611, filter circuit, voltage stabilizing circuit and adjustment circuit, [0005] The filter circuit includes a resistor R607, a capaci...

Claims

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Application Information

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IPC IPC(8): H03K5/02
Inventor 高磊刘金泽王晶李树臣王胜劲
Owner AEROSPACE HI TECH HLDG GROUP