Tire pressure detection device
A technology for air pressure detection and tires, which is applied to tire measurement, measurement devices, and inflation gas pressure measurement. It can solve the problems of increasing the number of measurements and increasing power consumption, so as to prevent false detection, suppress power consumption, and shorten the measurement cycle. Effect
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no. 1 approach
[0026] Refer to Figure 1 ~ Figure 6 The first embodiment of the present disclosure will be described. In addition, figure 1 The upper part of the paper is the front of the vehicle 1, and the lower part of the paper is the rear of the vehicle 1, and the left-right direction of the paper is consistent with the left-right direction of the vehicle.
[0027] figure 1 The tire pressure detection device shown is installed in a vehicle 1 and is configured to include transmitters 2 a to 2 d, a receiver 3 and a display 4.
[0028] Such as figure 1 As shown, the transmitters 2a to 2d are installed on the wheels 5a to 5d in the vehicle 1 to detect the air pressure of the tires installed on the wheels 5a to 5d, and the data of the detection signal representing the detection result is stored in the frame And send. In addition, the receiver 3 is installed on the vehicle body 6 side of the vehicle 1, receives frames transmitted from the transmitters 2a to 2d, and performs various processing, ca...
no. 2 approach
[0077] The second embodiment of the present disclosure will be described. In this embodiment, the processing executed by the control unit 22 is changed from the first embodiment, and the rest is the same as the first embodiment, so only the differences from the first embodiment will be described.
[0078] In the first embodiment described above, the measurement period F is made shorter than the period of one rotation of the tire. However, in this embodiment, the period of one rotation of the tire is ignored, in other words, even if the measurement period F is shorter than the period of tire rotation. The cycle of one lap is long, and driving judgment can be made with high accuracy. In addition, in the following description, the measurement period F is expressed as long, medium, short, etc., but it means that the measurement period F is shortened in stages. For example, in the case of a long measurement period F, it means that the acceleration measurement interval is longer than ...
other Embodiment approach
[0101] For example, in the first embodiment, in the initial setting process, it is assumed that the vehicle is parked during the first accelerometer measurement, and the measurement period F is set to the maximum value, and thereafter, it is matched to the driving state. The measurement period F is changed. In contrast, the measurement period F may be set to the shortest period during the first accelerometer measurement, and the measurement period F may be extended every time the number of trials of acceleration measurement increases to gradually change to the driving state. Matching measurement period F. In addition, the vehicle speed may be estimated based on the measured value of acceleration obtained when the previous accelerometer measurement was performed, and the vehicle speed may be set to the measurement period F corresponding to the estimated vehicle speed. In addition, when the measurement period F is changed in accordance with the driving state, the measurement val...
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