DATA COMMUNICATION SYSTEM, DATA COMMUNICATION METHOD, SENSOR AND SENSOR CONTROL DEVICE
First Claim
1. A data communication system including a sensor measuring a given state and a sensor control device capable of communicating with the sensor,the sensor comprising:
- a measurement unit configured to measure a given state at a predetermined time;
a predicted-value retention unit configured to retain a predicted value of the given state transmitted from the sensor control device;
a calculation unit configured to calculate data to be transmitted to the sensor control device based on a measured value obtained by the measurement unit and the predicted value retained by the predicted-value retention unit; and
a first transmission unit configured to transmit the data obtained by the calculation unit to the sensor control device, andthe sensor control device comprising;
a measured-value generation unit configured to generate the measured value obtained by the sensor based on the data transmitted from the first transmission unit and the predicted value;
a storage unit configured to store the measured value generated by the measured-value generation unit;
a predicted-value generation unit configured to generate a predicted value of a measured value to be measured next based on the measured value; and
a second transmission unit configured to transmit data of the predicted value generated by the predicted-value generation unit to the sensor.
1 Assignment
0 Petitions
Accused Products
Abstract
A sensor makes the second measurement, and calculates an absolute value of the difference between a generated second measured value and a first predicted value for the measured value. If the absolute value of the difference for the measured value is greater than a first predetermined value, data of the measured value is transmitted to a server 31. Based on the transmitted measured value, the server 31 generates the second measured value. Then, the next predicted value is generated based on the first predicted value and the second measured value. An absolute value of the difference between each of the second predicted values and each of the first predicted values is calculated. If the absolute value of the difference is greater than a second predetermined value, the difference is transmitted to the sensor 21. The sensor 21 generates the next predicted value based on the transmitted difference.
9 Citations
8 Claims
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1. A data communication system including a sensor measuring a given state and a sensor control device capable of communicating with the sensor,
the sensor comprising: -
a measurement unit configured to measure a given state at a predetermined time; a predicted-value retention unit configured to retain a predicted value of the given state transmitted from the sensor control device; a calculation unit configured to calculate data to be transmitted to the sensor control device based on a measured value obtained by the measurement unit and the predicted value retained by the predicted-value retention unit; and a first transmission unit configured to transmit the data obtained by the calculation unit to the sensor control device, and the sensor control device comprising; a measured-value generation unit configured to generate the measured value obtained by the sensor based on the data transmitted from the first transmission unit and the predicted value; a storage unit configured to store the measured value generated by the measured-value generation unit; a predicted-value generation unit configured to generate a predicted value of a measured value to be measured next based on the measured value; and a second transmission unit configured to transmit data of the predicted value generated by the predicted-value generation unit to the sensor. - View Dependent Claims (2, 3, 4, 5)
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6. A data communication method for transmitting data of measured values obtained by a sensor to a sensor control device, the method comprising the steps of:
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measuring, by the sensor, a given state at a predetermined time; retaining a predicted value of the given state transmitted from the sensor control device in the sensor; calculating data to be transmitted to the sensor control device based on the measured value obtained in the measuring step and the predicted value retained in the predicted-value retaining step; firstly transmitting the data obtained in the calculating step to the sensor control device; generating, by the sensor control device, a measured value obtained by the sensor based on the data transmitted in the first transmitting step and the predicted value; storing the measured value generated in the measured-value generating step; generating a predicted value of a measured value to be measured next based on the measured value; and secondly transmitting data of the predicted value generated in the predicted-value generating step to the sensor.
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7. A sensor measuring a given state comprising:
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a measurement unit configured to measure the given state at a predetermined time; a predicted-value retention unit configured to retain a predicted value of the given state transmitted from a sensor control device capable of communicating with the sensor; a calculation unit configured to calculate data to be transmitted to the sensor control device based on a measured value obtained by the measurement unit and the predicted value retained by the predicted-value retention unit; and a transmission unit configured to transmit the data obtained by the calculation unit to the sensor control device.
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8. A sensor control device capable of communicating with a sensor measuring a given state, comprising:
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a measured-value generation unit configured to generate a measured value obtained by the sensor, upon reception of data transmitted from the sensor, based on the data and a predicted value; a storage unit configured to store the measured value generated by the measured-value generation unit; a predicted-value generation unit configured to generate a predicted value of a measured value to be measured next based on the measured value; and a transmission unit configured to transmit data of the predicted value generated by the predicted-value generation unit to the sensor.
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Specification