我想发明一种刹车感应器。它能像蝙蝠一样发出超声波,当发出的超声波碰到离汽车只有两米的障碍物而反弹回来时,刹车感应器立即做出反应,自动中断汽车各部件的工作,及时刹住汽车。离开障碍物,汽车就可以重新启动。有了这种装置,就能避免因刹车机件失灵或驾驶员反应不及时所造成 I want to invent a brake sensor. It emits ultrasound like a bat. When the emitted ultrasound bumps into an obstacle that is only two meters away from the car and bounces back, the brake sensor immediately responds by automatically interrupting the work of the car's various components and braking the car in time. Leave the obstacle, the car can restart. With this device, it is possible to avoid the malfunction of the brake mechanism or the untimely reaction of the driver