Simulator for rotating speed signals of engine
A signal simulator, engine speed technology, applied in the direction of engine control, machine/engine, mechanical equipment, etc., can solve the problem that the Hall-type engine speed signal simulator cannot realize the analog output of the magnetoelectric speed sensor, the amplitude is not adjustable, etc. problems, to achieve the effect of convenient debugging and testing, improving anti-interference ability, and stable work
Inactive Publication Date: 2013-12-11
LIANCHUANG AUTOMOBILE ELECTRONICS
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The disadvantage is that the amplitude cannot be adjusted, the peak-to-peak value is fixed at about 5V, and there is no isolation measure for the two output signals
The hall-type engine speed signal simulator cannot realize the analog output of the magnetoelectric speed sensor
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[0026] see figure 1 , The engine speed signal simulator of the present invention includes a DC power supply, a microcontroller (MCU, single-chip microcomputer), a display screen, buttons, an isolation module, a differential conversion module and a drive module. Among them, the DC power supply supplies power for the microcontroller, the display screen, the keys, the isolation module, the differential conversion module and the drive module. The microcontroller outputs the crankshaft signal and the camshaft signal. The button is for the user to choose the simulation mode of the engine speed signal simulator, that is, to simulate a Hall speed sensor or a magnetoelectric speed sensor. The display screen displays in real time the simulation mode of the engine speed signal simulator (Hall type or magnetoelectric type), the current output frequency of the crankshaft signal, and the output mode of the camshaft signal (single tooth, 4+1 or 6+1).
[0027] When the user selects to simul...
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The invention discloses a simulator for rotating speed signals of an engine. The simulator comprises a direct current power source, a microcontroller, a display screen, a press key, a seperation module, a difference conversion module and a driving module. The simulator for the rotating speed signals of the engine is switched through the press key, can simulate the rotating speed signals of the engine output by a magnetoelectric sensor and a Hall type velocity sensor, expands the range of application and facilitates the debugging and detection of an ECU (Electronic Control Unit) of the engine. The rotating speed signals of the engine output by the devices provided by the invention are subjected to isolation processing, and therefore, the capacity of resisting disturbance of the signals is increased, and the simulator can stably operate in a hostile electromagnetic environment.
Description
technical field [0001] The invention relates to an analog generation circuit of a vehicle engine speed signal. Background technique [0002] The engine speed signal of the actual vehicle is measured by the speed sensor, and the common speed sensors are Hall-type and magneto-electric. [0003] The engine speed signal output by the Hall-type speed sensor includes a crankshaft signal and a camshaft signal, both of which are square wave signals whose amplitude is fixed at about 5V (or 12V). [0004] The engine speed signal output by the magnetoelectric speed sensor includes three channels: crankshaft positive signal, crankshaft negative signal, and camshaft signal. Among them, the crankshaft positive signal and crankshaft negative signal are a pair of sine wave signals in differential form. The amplitude varies with the frequency, and the peak-to-peak value of the amplitude will reach about 40V at most. The camshaft signal is a square wave signal whose amplitude is fixed at ab...
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IPC IPC(8): F02D45/00
Inventor 孙耀军韩本忠童毅
Owner LIANCHUANG AUTOMOBILE ELECTRONICS