AVG-VDP1/UC
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7.3 EXPLANATION
7.3.1 CIRCUIT DESCRIPTIONS
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What You Can Do with AVG-VDP1
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Indication of various vehicle dynamic information
Speed, engine revolution number, power supply voltage, back-and-forth acceleration G,
side-to-side G, revolution angle speed, horsepower, torque, gradient
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Indication of GPS acquisition information
Time, latitude/longitude, direction, altitude
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Easy navigation function via GPS
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Revolution Number Detection Circuit 1
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The revolution number can be read from power source noise.
Alternating current elements via a generator for battery charging
-> Relative to the engine revolution number
There is a definite relation between alternating current frequency and the engine revolution number.
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Frequency at 4000 rpm can be set by user operation.
Linear complement between 0 rpm = 0Hz and 4000 rpm
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Revolution Number Detection Circuit 2
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Circuit block
Remove 0
Ω
resistor , and input test signals from here without 0
Ω
at diagnosis
Input 200mVp-p sine waves and confirm change of output voltage according to frequency
Form alternating current waveforms and convert them to direct current with a frequency/voltage conversion IC
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Other Measurement
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Speed
-> Calculated from the car speed pulse (at 3D hybrid)
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Power Supply Voltage
-> Read 9-15.6V with 8-bit A/D
-> Calculated from change of the car speed pulse
-> Computed from the car speed and revolution angle speed
To microcomputer
F/V IC
HPF
0R0
Remove if checking
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