Method and device for calling a remote electric car
First Claim
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1. An electric car having remote calling control system, comprises:
- a position transmitter carried by a caller for producing a azimuth signal, comprises;
an electronic compass module having a sensor for detecting the terrestrial magnetism and producing a first azimuth data of the caller;
a first microprocessor converting the first azimuth data into the first azimuth signal;
an encoder encoding the first azimuth signal; and
a radio frequency transmitter which transmits the first azimuth signal; and
a car comprises;
a car body having at least one front wheel installed at the front end of the car body;
two driving wheels installed on both sides of the car body;
an electronic compass detecting the terrestrial magnetism and producing a second azimuth data for the driving direction of the car;
a position receiver receiving the first azimuth signal comes from the radio frequency transmitter;
a decoder decoding the received first azimuth signal;
a second microprocessor which converts the second azimuth data into a second azimuth signal a driving controller;
at least one electric motor which drives the driving wheel to rotate according to a command from the driving controller; and
at least one battery which supplies the required power;
when the caller uses the position transmitter to aim at the car, the electronic compass module detects the terrestrial magnetism and produces the first azimuth data of the caller, the microprocessor converts the first azimuth data to the first azimuth signal, and the radio frequency transmitter transmits the first azimuth signal to the position receiver of the car and input into the second microprocessor, also the electronic compass of the car detects the terrestrial magnetism and produces the second azimuth data and input into the second microprocessor and converted to the second azimuth signal, the second processor compares the first azimuth signal with the second azimuth signal and computes an azimuth difference, and the azimuth difference be used as a signal for controlling the movements of said car, and if the azimuth difference is zero, the car aims at the caller and moves forward, and if the azimuth difference is not zero, the second processor sends a signal for turning direction to the driving controller, and the driving controller controls the motor to drive so that the car be turned from its original position until said azimuth difference becomes zero, and then the car moves forward.
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Abstract
An electric car includes a remote control calling system includes a transmitter and a car, and both of which have an electronic compass for detecting the terrestrial magnetism to obtain an azimuth and calculating the azimuth difference of the two by simple computations. The system automatically controls the direction of the car driving towards a user, and achieves the purposes of simplifying the car structure and facilitating its use.
14 Citations
9 Claims
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1. An electric car having remote calling control system, comprises:
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a position transmitter carried by a caller for producing a azimuth signal, comprises;
an electronic compass module having a sensor for detecting the terrestrial magnetism and producing a first azimuth data of the caller;
a first microprocessor converting the first azimuth data into the first azimuth signal;
an encoder encoding the first azimuth signal; and
a radio frequency transmitter which transmits the first azimuth signal; and
a car comprises;
a car body having at least one front wheel installed at the front end of the car body;
two driving wheels installed on both sides of the car body;
an electronic compass detecting the terrestrial magnetism and producing a second azimuth data for the driving direction of the car;
a position receiver receiving the first azimuth signal comes from the radio frequency transmitter;
a decoder decoding the received first azimuth signal;
a second microprocessor which converts the second azimuth data into a second azimuth signal a driving controller;
at least one electric motor which drives the driving wheel to rotate according to a command from the driving controller; and
at least one battery which supplies the required power;
when the caller uses the position transmitter to aim at the car, the electronic compass module detects the terrestrial magnetism and produces the first azimuth data of the caller, the microprocessor converts the first azimuth data to the first azimuth signal, and the radio frequency transmitter transmits the first azimuth signal to the position receiver of the car and input into the second microprocessor, also the electronic compass of the car detects the terrestrial magnetism and produces the second azimuth data and input into the second microprocessor and converted to the second azimuth signal, the second processor compares the first azimuth signal with the second azimuth signal and computes an azimuth difference, and the azimuth difference be used as a signal for controlling the movements of said car, and if the azimuth difference is zero, the car aims at the caller and moves forward, and if the azimuth difference is not zero, the second processor sends a signal for turning direction to the driving controller, and the driving controller controls the motor to drive so that the car be turned from its original position until said azimuth difference becomes zero, and then the car moves forward. - View Dependent Claims (2, 3)
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4. A method for calling a remote electric car, comprising:
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a caller using a position transmitter to aim at a desired car, so that the position transmitter produces a first azimuth signal, and the first azimuth signal being produced by the direction of terrestrial magnetism and the direction of the position transmitter, and transmitting the first azimuth signal to the car;
the car producing a second azimuth signal, and the second azimuth signal being produced by the direction of terrestrial magnetism and the driving direction of the car;
the car receiving the first azimuth signal come from the transmitter of the caller; and
comparing the first azimuth signal with the second azimuth signal and computing an azimuth difference, and the azimuth difference being used as a signal for controlling the movements of the car, and the principle of controlling the movements of the car comprising;
(a) if the azimuth difference is zero, it means that the traveling direction of the car aims at the caller, and the car will move forward; and
(b) if the azimuth difference is not zero, the direction of the car will be turned from its original position until said azimuth difference becomes zero, and then the car will move forward. - View Dependent Claims (5, 6, 7, 8, 9)
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Specification