| 摘要 |
PURPOSE:To provide a driver supporting device for an electric car which makes it possible to audibly recognize the condition of rotation of its electric motor, when a quietly rotating electric motor is used as a power source. CONSTITUTION:Respective detection signals from an acceleration opening sensor 11 and a magnetic sensor 13 for detecting the rotation of a motor are imputted to a CPU 17 through the A/D converter 15 and a waveform shaping circuit 16 of a control circuit 14 respectively. The CPU 17 detects the operation of an accelerator and allows the production of a dummy sound, and reads a signal of a dummy sound of a pattern corresponding to the number of rotations of the motor detected from a ROM 19. This dummy sound signal is outputted through an output circuit 20 and its sound is produced by a speaker 22. Here, in a state of the number of rotations of the motor detected being high, a dummy sound pattern having a large high-frequency component and a large sound volume is selected. And in a state of the number of rotations of the motor being low, a dummy sound pattern having a large low-frequency component and a small sound volume. |
