The transmitter sends out radio signals and the receiver monitors the signal reflections that come back. Based on this information, the radar device can determine the proximity of any surrounding object. Tilt Detectors To protect against car thieves with tow trucks, some alarms have "tilt detectors...
2.Flashlights(手电筒) and spare batteries. Keep a flashlight beside you bed, at your office and in your car. Do not use matches(火柴) after an earthquake until you are sure that no gas leaks(气体泄漏). Prepare a radio and some spare batteries. Most telephones will be out of order, ...
Motorists get stranded on roads in whiteout conditions every winter; here's what you need to have in your car to be prepared if it happens to you this winter.
(MODE1 and MODE2) Charging Voltage: 3.7V Remote Control Distance: 40-50m Flight Time: 30 minutes Package Includes: USB Cable, Remote Controller, Batteries Features: **Adventurous Playtime** The RC Car Electric Radio Remote Control Cars 1:18 Buggy Off-Road Control Trucks are designed for the...
When the radio waves from the key go into your water-dense body, a ‘dielectric resonator’ is created. This increases the amplitude of the waves, and thus, the range of the signal. See also Andorra’s Best-Selling Car Is… The Porsche 911? × And yes, this means you don’t ...
the radio energy will bounce back in the same pattern. But if somebody enters the area, the reflection pattern is disturbed. When this happens, the sensor sends a signal and the door opens. In a security system, the sensor sends an alarm signal when the reflection pattern in a room is ...
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A1 Abstract: The accident warning system for the vehicle has several collision sensors spaced about the vehicle to monitor impacts from different directions, and to activate a radio beacon to warn other road users. The beacon operates over a short range and with a broad band so that it is de...
Radio-receiver and transmitter apparatus for application in motor vehicles intended to ensure the use of non-dazzling lights during night crossings, essentially characterized in its transmitter circuit since it is made up of an electronic tube as well as the oscillating circuit; quartz ensures ...
根据上句I turned on the radio of the truck,hoping to get some weather information.可知我打开卡车的收音机,希望能得到一些天气信息。说明我警觉地继续开车。故答案为A。(6)考查名词及语境理解。A.top顶端;B.back后面;C.bottom底部;D.end末端。根据下句I looked upward to see ...