Remote operation system with enhanced door lock security of vehicle

• US 20060087404A1
• Filed: 10/25/2005
• Published: 04/27/2006
• Est. Priority Date: 10/26/2004
• Status: Active Grant

• Current Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Original Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Inventors: Iijima, Kota
• Granted Patent: US 7,515,037 B2
• Time in Patent Office: Days
• US Class Current: 340/5.610
• CPC Class Codes: B60C 23/0433 Radio signals
• CPC Class Codes: B60C 23/0444 Antenna structures, control or arrangements thereof, e.g. for directional antennas, diversity antenna, antenna multiplexing or antennas integrated in fenders
• CPC Class Codes: B60R 25/24 using electronic identifiers containing a code not memorised by the user
• CPC Class Codes: G07C 2209/63 Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks

Abstract

A remote operation system includes responders that detects the pressure of tires of a vehicle, an interrogator that is provided in a main body of the vehicle and communicates with the responders so as to process pressure data, a plurality of antennas that are provided in the vicinities of the tires, respectively, and are connected to the interrogator, and a portable transmitter for a remote operation that communicates with the interrogator and unlocks the doors of the vehicle. The interrogator has a reception intensity detector that detects an intensity of a received signal from the transmitter received by each antenna. When each antenna receives an unlock signal to be transmitted from the transmitter, a door closest to one of the antennas which receives a signal having the highest reception intensity is unlocked.

Claims

1. A remote operation system comprising:

responders that are provided to correspond to tires of a vehicle and detect a pressure of the tires;

an interrogator that is provided in a main body of the vehicle and communicates with the responders so as to process pressure data;

a plurality of antennas that are provided in the main body of the vehicle in the vicinities of the tires, respectively, and are connected to the interrogator; and

a portable transmitter for a remote operation that communicates with the interrogator and unlocks doors of the vehicle,

wherein the interrogator has a reception intensity detector that detects an intensity of a received signal from the transmitter received by each antenna, and

when each antenna receives an unlock signal to be transmitted from the transmitter, a door closest to one of the antennas which receives a signal having the highest reception intensity is unlocked.

2. The remote operation system according to claim 1,

wherein, when a signal intensity of the signal having the highest reception intensity is equal to or greater than a predetermined value, the door is unlocked.

3. The remote operation system according to claim 1,

wherein the transmitter and the interrogator communicate with each other in an ID confirmation mode and in an unlock mode subsequent to the ID confirmation mode, and

the interrogator unlocks the door after confirming an ID of the transmitter.

4. The remote operation system according to claim 3,

wherein the interrogator has a synchronous detector and a first carrier oscillator,

the transmitter has a second carrier oscillator, a modulated signal oscillator, a modulator, and a battery that drives the second carrier oscillator and the modulated signal oscillator,

the first carrier oscillator and the second carrier oscillator output carriers having the same frequency,

in the ID confirmation mode, the second carrier oscillator and the modulated signal oscillator are driven by the battery, and a modulated wave on which an ID recognition signal is superimposed is generated by the modulator and transmitted to the interrogator, and

in the unlock mode, only the modulated signal oscillator is driven by the battery, a signal for modulation is transmitted from the transmitter and inputted to the synchronous detector, and the interrogator inputs the carrier from the first carrier oscillator to the synchronous detector.

5. The remote operation system according to claim 3,

wherein the interrogator has a directional broad-band antenna that receives the modulated wave in the ID confirmation mode.