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Antenna for tire pressure information sending apparatus and tire pressure information sending apparatus using the same

An information transmission device and air pressure technology, which can be applied to antennas, tire measurement, measurement devices, etc., can solve the problems of reducing transmission impedance and transmission impedance, and achieve the effects of reducing conductor loss, improving antenna characteristics, and effectively using space.

Inactive Publication Date: 2005-08-24
KYOCERA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the radiation wave generated by the loop antenna 18 cancels the induced current of the rim and the transmission impedance is significantly reduced, and the radiation impedance is lowered.

Method used

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  • Antenna for tire pressure information sending apparatus and tire pressure information sending apparatus using the same
  • Antenna for tire pressure information sending apparatus and tire pressure information sending apparatus using the same
  • Antenna for tire pressure information sending apparatus and tire pressure information sending apparatus using the same

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Embodiment Construction

[0039]Hereinafter, the antenna for a tire pressure information transmitting device according to the present invention and the tire pressure information transmitting device using the antenna will be described in detail with reference to the accompanying drawings.

[0040] Figure 1A as well as Figure 1B It is a diagram for explaining the tire air pressure information transmission device according to Embodiment 1 of the present invention, Figure 1A is a stereogram, Figure 1B for side view.

[0041] Such as Figure 1A as well as Figure 1B As shown, the tire pressure information transmitting device of the present invention is composed of a housing 3 , a circuit board 4 disposed in the housing 3 , a pressure sensor 2 , a transmitting circuit 7 and a transmitting electrode 8 . The pressure sensor 2 is provided on the main surface 4a of the circuit board 4, and detects tire air pressure information. The transmission circuit 7 is provided on the main surface 4a of the circui...

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Abstract

The antenna 1 for the tire air pressure information transmitting device comprises a circuit board 4 provided with feeding electrodes 6, and a radiation electrode 8 for transmitting tire air pressure information as electric waves and having a loop plane 9 nearly perpendicular to a main surface 4a on the main surface 4a of the circuit board 4, thereby a magnetic field vector is generated to be in parallel with the main surface 4a of the circuit board 4 and also in parallel with the wheel rim 5, when being provided as a device on the wheel rim 5. Since the magnetic field vector caused by a mirror reflection effect to the wheel rim 5 becomes nearly the same direction as a magnetic field vector of the antenna 1, deterioration in the antenna characteristics can be effectively prevented.

Description

technical field [0001] The present invention relates to an antenna for a tire air pressure information transmitting device that detects the air pressure of a tire and transmits and receives the air pressure information as radio waves, a tire air pressure information transmitting device having the tire air pressure information transmitting device antenna, and a tire air pressure information transmitting device having the tire air pressure information The wheel with the tire pressure information transmitter of the transmitter. Background technique [0002] For the safe driving of vehicles, people attach great importance to maintaining proper tire pressure. Countries centered on Europe and the United States are making legislation to stipulate that citizens must fulfill the obligation to install devices to monitor tire pressure in vehicles. [0003] Such a tire air pressure information transmitting device generally includes a pressure sensor for detecting the air pressure in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L17/00B60C23/00B60C23/02B60C23/04G08C17/02H01Q1/22H01Q1/32H01Q7/00
CPCB60C23/0433
Inventor 佐藤昭典
Owner KYOCERA CORP
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