Receiving device and tire pressure monitoring system
First Claim
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1. A tire pressure monitoring system, comprising:
- a receiving device comprising;
a receiving unit that receives encoded data encoded with a Manchester code in which a high pulse and a low pulse are combined with each other so as to represent a bit;
a measuring unit that measures a pulse width of the encoded data;
a edge determining unit that determines a rising edge or a falling edge of a pulse end;
a logical value determining unit that determines a bit data of the encoded data on the basis of the pulse width, the rising edge or falling edge of the pulse end, and a bit data of a bit before the determined bit;
a transmitting device comprising;
an encoding unit that encodes data indicating a tire pressure with a Manchester code, in which a high pulse and a low pulse are combined with each other so as to represent a bit, so as to obtain the encoded data;
a tuner circuit that receives an electric wave transmitted from the transmitting device, and a control unit that decodes the encoded data received by the tuner circuit and transmits the decoded tire pressure data to the display;
wherein the control unit includes an interruption control unit that controls the interruption of the measurement of a pulse width of the data encoded with the Manchester code, a measuring unit, a counter that measures a pulse width of the encoded data, an arithmetic unit that performs the arithmetic for determining a bit data of the encoded data, an ROM that stores control program, an RAM that stores various data so as to be rewritten, and a communication control unit that performs the control when the decoded tire pressure data is transmitted to the display.
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Abstract
A receiving device is provided. A pulse width is measured, it is selected whether a determination process is performed for a pulse width having the length of one bit in accordance with the measured value of the pulse width or a pulse width having the length of ½ bit, it is discriminated whether a current pulse edge is a pulse edge at the center of the bit or a pulse edge at the boundary between bits while considering the bit data right before the determined bit, and when it is determined that the current pulse edge is the pulse edge at the center of the bit, the bit data is determined by the rising edge or the falling edge of the pulse edge.
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Citations
5 Claims
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1. A tire pressure monitoring system, comprising:
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a receiving device comprising;
a receiving unit that receives encoded data encoded with a Manchester code in which a high pulse and a low pulse are combined with each other so as to represent a bit;a measuring unit that measures a pulse width of the encoded data; a edge determining unit that determines a rising edge or a falling edge of a pulse end;
a logical value determining unit that determines a bit data of the encoded data on the basis of the pulse width, the rising edge or falling edge of the pulse end, and a bit data of a bit before the determined bit;a transmitting device comprising;
an encoding unit that encodes data indicating a tire pressure with a Manchester code, in which a high pulse and a low pulse are combined with each other so as to represent a bit, so as to obtain the encoded data;
a tuner circuit that receives an electric wave transmitted from the transmitting device, and a control unit that decodes the encoded data received by the tuner circuit and transmits the decoded tire pressure data to the display;wherein the control unit includes an interruption control unit that controls the interruption of the measurement of a pulse width of the data encoded with the Manchester code, a measuring unit, a counter that measures a pulse width of the encoded data, an arithmetic unit that performs the arithmetic for determining a bit data of the encoded data, an ROM that stores control program, an RAM that stores various data so as to be rewritten, and a communication control unit that performs the control when the decoded tire pressure data is transmitted to the display. - View Dependent Claims (2, 3, 4, 5)
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Specification