VEHICLE DETECTING SENSOR ASSEMBLY

摘要

A vehicle detecting sensor assembly (1) includes a microwave module (4) and a radome (5) for detecting the presence or absence of a parked vehicle, parked in a predetermined parking area (3), according an FMCW scheme. A shielding member (10) is provided on each of left and right sides, each of upper and lower sides or each of upper and lower and left and right sides of the module so as to protrude in a direction, conforming to the direction of transmission of a microwave, so that a detection range angle by the microwave can be varied in dependence on the position of the sensor and the size of the parking area, and a so disposed that the distance of separation between the module and the radome, through which the microwave passes, may lie in the vicinity of n times the half-wave length of the microwave.

主权项

1. A vehicle detecting sensor assembly which comprises a microwave module to transmit and receive microwave, and a radome to cover a front face of a transmitting direction in the microwave module, and is operable to detect the presence or absence of a parked vehicle, parked in a predetermined parking area, according an FMCW scheme for calculating the distance to a measurement object on the basis of a beat frequency signal between a transmitted signal of a microwave and a received signal reflected upon the measurement object, which system comprises:
a shielding member provided on each of left and right sides, each of upper and lower sides or each of upper and lower and left and right sides of the microwave module so as to protrude in a direction conforming to the direction of transmission of a microwave, so that a detection range angle by the microwave can be varied in dependence on the position of the sensor assembly and the size of the area; the microwave module being so disposed that the distance of separation between the microwave module and the radome, through which the microwave passes, may lie in the vicinity of n times the half-wave length of the microwave.