JPH0549498B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an obstacle detection device that is used as an auxiliary means for confirming the presence or absence of obstacles in areas where it is difficult for the driver of a vehicle to visually confirm the presence or absence of obstacles.

[Conventional technology]

In the conventional capacitive obstacle detection device of this kind, the sensor part is attached in the manner shown in FIG. 4 or FIG. 5. First, in the device shown in FIG. A vinyl-coated electric wire 21 is laid, and the electric wire 21 is fixed by adhering it to the resin bumper 1 using adhesive from a tape-shaped or piece-shaped holder 22, for example. Further, in the case shown in FIG. 5, a corner rubber 24 made of rubber, for example, is attached and attached to the corner portion of the front surface side of the resin bumper 1 so as to cover the metal plate 23.

[Problem to be solved by the invention]

However, the one shown in FIG. 4 described above has the problem that firstly, the arrangement when laying the electric wire 21 tends to vary, which tends to cause individual differences in the direction or sensitivity of obstacle detection. , and secondly, during the installation work, the resin bumper 1
Release material from molding remains on the surface of the mold, making adhesion difficult, requiring a cleaning process over a wide area with a primer to remove it, and the installation work becomes extremely complicated. The one shown in FIG. In recent years, some car models have cornering lamps buried in the corners of the resin bumper 1, which creates a problem in which the sensor part itself cannot be attached, and it is a challenge to solve these problems. It is.

[Means to solve the problem]

The present invention provides a capacitive obstacle detection device in which a sensor section is attached to a resin bumper as a specific means for solving the conventional problems described above. By providing a capacitance type obstacle detection device characterized in that a magnetic part is commonly used as the sensor section, the above-mentioned problems can be eliminated and the above-mentioned conventional problems can be solved.

【Example】

Next, the present invention will be explained in detail based on an embodiment shown in the drawings. The reference numeral 1 in FIG. 1 is a resin bumper similar to the conventional example, and the resin bumper 1 has a lamp 2 embedded therein according to the present invention and is used as a sensor part of a capacitive obstacle detection device. However, in view of the detection characteristics required of this type of obstacle detection device, it is preferable to provide the lamp at the corner of the resin bumper 1, and therefore the lamp 2 is a direction indicator lamp 3, a cornering lamp 4, or a combination of the two. It is preferable to form it as. Second, in order to explain the present invention in more detail, the cornering lamp 4 of the lamp 2 is shown in cross section. A light bulb 4b is inserted into a socket 4c at the focal point of the reflecting mirror 4a, and a lens 4d, a ring 4e, etc. are further attached. Generally, the reflecting mirror 4a is provided with a metal coating such as aluminum vapor deposition in order to improve the reflectance, so it is electrically conductive regardless of the member formed thereon. A lead wire 4f is attached to 4a, and this reflecting mirror 4a is used as a sensor section of the obstacle detection device. Here, when the reflecting mirror 4a is shared as a sensor section, when the power line 4g for lighting the light bulb 4b comes into contact with the reflecting mirror 4a, the reflecting mirror 4a is connected to either the positive or negative power line 4g. In this case, it is equivalent to being grounded in terms of high frequency, and the detection operation is stopped. Therefore, especially when the reflecting mirror 4a and the socket 4c are both made of metal, it is preferable to use an insulating material such as resin. The formed insulating ring 5 is used to completely insulate the reflecting mirror 4a and the socket 4c. FIG. 3 shows a block diagram of a capacitive obstacle detection device using the reflecting mirror 4a as a sensor section, in which a high frequency signal oscillated by a high frequency oscillator OSC is applied to the reflecting mirror 4a to be detected. object
When the OJT approaches, a stray capacitance FRT is generated, and the high frequency signal is attenuated by being grounded through this stray capacitance FRT. Then,
The high frequency signal is suitably amplified by a preamplifier PRI, then detected by a detector DET and converted into a DC signal, and this DC signal is compared by a voltage comparator CON to obtain the proximity of the detected object OJT as an electrical signal. It becomes something that can be done. The above explanation has been given using an example in which the reflecting mirror 4a is shared as a sensor part, but for example, if the ring 4e is
If it is made of a conductive material, it may be used; in short, any portion may be used as long as it is made of a conductive material.

【Effect of the invention】

As explained above, according to the present invention, by using the conductive part of the cornering lamp embedded in the resin bumper as the sensor part, firstly, all the parts are molded with a mold, and the shape and mounting position are fixed. The sensor part has the excellent effect of eliminating individual differences in detection and increasing practicality by using highly accurate parts such as the above.Secondly, by sharing it with the cornering lamp, the design of the automobile can be improved. This has the excellent effect of eliminating damage and making it possible to install it on all types of vehicles.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the capacitive obstacle detection device according to the present invention, and FIG.
3 is a block diagram showing an electric circuit of the same embodiment, and FIGS. 4 and 5 are perspective views showing a conventional example. 1...Resin bumper, 2...Lamp, 3...Direction indicator light, 4...Cornering lamp, 4a...Reflector, 4b...Light bulb, 4c...Socket, 4d...
Lens, 4e...Ring, 4f...Lead wire, 4
g...power line, 5...insulation ring, OSC...oscillator, PRI...preamplifier, DET...detector,
CON...Voltage comparator.

Claims (1)

[Claims] 1. A capacitive obstacle detection device comprising a sensor section attached to a resin bumper, characterized in that a conductive portion of a cornering lamp embedded in the resin bumper is commonly used as the sensor section. type obstacle detection device.