JP2003227785A - Durability-testing apparatus of sheet sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To repeatively apply a fixed load to a sheet sensor. <P>SOLUTION: A rotary disc 4 is mounted at the end part of a horizontal rotary shaft 3 that is rotated by the drive of a motor M, a second rotary shaft 5 is pivoted at a position that is eccentric from the rotary center of the disc 4, and one end of a cylinder 6 is rotatably mounted on it. One end of a chain 7 is fixed into the cylinder 6, the middle of the suspension of the other end of the chain 7 from the opening of the cylinder 6 to the outside is pinched gently by a pair of guide rollers 8, a weight 10 is suspended at the lower end of a portion that is suspended vertically from the position, and a sheet sensor S is placed on a placement stand 11 at the lower portion via a buffer plate 12. The output circuit of the sheet sensor S is connected to the input circuit of a sensor 14 for measuring the number of applied loads, and the number of application of loads is measured by an AND circuit of a generation pulse signal in the sensor 14 for measuring the number of applied loads when the sheet sensor S detects the load and a generated pulse signal due to the application of the load on the sheet sensor S. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for testing the durability of a seat sensor mounted on a vehicle seat for detecting whether or not a person is seated on the seat, against repeated loads.

[0002]

2. Description of the Related Art An automobile seat sensor detects whether or not a person is seated on a seat on which the seat is mounted. Since a load is applied each time a person sits on the seat, it depends on the repetition frequency of the load. , The sensor life is determined.

Therefore, in order to determine the life of the sensor, it is necessary to perform a durability test in which a constant load is repeatedly applied to the sheet sensor.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus for performing such a durability test on a sheet sensor.

[0005]

In order to achieve the above object, in the present invention, as a durability test apparatus for the sheet sensor, a mounting table for the sheet sensor and a sheet sensor mounted on the mounting table are provided. Hold the weight and lower it, place it on a fixed point in the horizontal direction on the sheet sensor, and then raise the weight while the load of only the weight is applied to the fixed point. The lifting device is configured to alternately repeat the state in which the load is no longer applied to the fixed point, and the measuring device for measuring the number of times of lifting and lowering of the weight by the lifting device.

In the above structure, if a cushioning member is arranged on the upper surface of the sheet sensor placed on the above-mentioned mounting table, an impact load is not applied to the sheet sensor, an accurate test can be performed, and the sheet can be tested. There is no danger of damaging the sensor.

In the above structure, the wiring of the output circuit of the seat sensor is connected to the wiring of the input circuit of the sensor for measuring the number of times of load application, and each time the seat sensor senses the load, the number of times of application of the load is measured. Sensor for transmitting a pulse, and by taking the AND circuit of the generated pulse signal and the generated pulse signal by the load application to the seat sensor,
If the number of load application times is measured, if the sheet sensor is disconnected, the operation of the load application frequency measurement sensor is also stopped at the same time. It is the number of times the sensor is durable,
It is possible to immediately know the test result (the limit number of times the prescribed weight is applied).

Further, if the sheet sensor is connected to an electric circuit of a drive unit of the lifting device so that the lifting device is automatically stopped by the disconnection of the sheet sensor, the device performs an unnecessary operation. Never.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A is a schematic perspective view of the apparatus according to the embodiment.

This device, as shown in the figure, has a base plate B
A horizontal rotary shaft 3 rotatably supported by a bearing 2 is disposed in the center of the upper surface of the upper side of the gate-shaped pedestal 1 erected on the upper side, in a direction intersecting the upper side.

A sprocket 3s is attached to the rear end of the horizontal rotary shaft 3, and a timing belt T is wound around the sprocket Ms of the main shaft of the motor M provided adjacent to the horizontal rotary shaft 3. Has been done. The horizontal rotation shaft 3 is rotated by the belt conduction by the drive of the motor M.

On the other hand, the front end of the horizontal rotary shaft 3 is attached to the pedestal 1
The disc 4 is attached to the front side of the disc 4 concentrically with the shaft, and the front surface of the disc 4 has its rotation axis as shown in an enlarged view in (b). A second rotary shaft 5 parallel to the rotary shaft 3 is axially supported at a position eccentric from the rotary shaft 3. And the second rotary shaft 5
One end of the cylinder 6 is rotatably attached to the portion of the disk 4 that protrudes toward the front side of the drawing.

Inside the tube 6, one end of a chain 7 is fixed, and the other end of the chain 7 extends outward from the opening at the other end of the tube 6 and hangs down. The hanging part of the chain 7 is on the way to the other end (lower end),
It is gently sandwiched by a pair of guide rollers 8 provided at the center of the beam 1a of the gantry 1, and vertically hangs from the sandwiched position. A weight 10 is hung from the lower end of the vertically hanging portion via a joint 9.

The weight 10 is designed so that when the setting of the test load is changed, the total weight can be changed and dealt with.
A plurality of unit disks formed of an iron plate are attached to the joint 9 so that they can be freely inserted and removed. The sheet sensor S of the work to be tested is arranged below the weight 10 suspended by the lifting device as described above.

The seat sensor S is mounted on the upper surface of a mounting table 11 provided on the upper surface of the base plate B, and the cushioning plate 12 having a cushioning property is laid on the seat sensor S. The weight 10 is not directly placed on the sheet sensor S, but is placed on the upper surface of the uppermost one of the buffer plates 12, and the load of the weight 10 is passed through the buffer plate 12 It is adapted to be applied to the sheet sensor S.

The buffer plate 12 does not have to be interposed,
The purpose of this is to prevent an impact load from being applied to the sheet sensor S or damage to the sheet sensor S when the weight 10 is directly placed on the sheet sensor S. Therefore, if the cushioning property is such that the load of the weight 10 is absorbed, the test becomes inaccurate.
As described above, it is necessary to prevent the application of the impact load and the sheet sensor S from being damaged, and to ensure that the entire weight of the weight 10 is transmitted to the sheet sensor S.

As a method for preventing the seat sensor S from being subjected to an impact load or being scratched without providing the buffer plate 12 as described above, a lifting speed of the weight 10 by the lifting device is described. Sheet sensor S
The weight 10 may be allowed to act gently on this, but if this is done, it will take a very long time and become inefficient. Therefore, in this embodiment, the buffer plate 12 as described above is interposed. is there.

Further, in this embodiment, the sheet sensor S
The wiring 13 of the output circuit of the sensor 1 for measuring the number of times of load application
Each time the seat sensor S senses a load, the sensor 14 for measuring the number of times the load is applied transmits a pulse, and the generated pulse signal and the load applied to the seat sensor S The AND circuit of the generated pulse signals enables the number of times the load is applied to be measured. As a result, if the sheet sensor S is disconnected, the load application frequency measurement sensor 14 also stops its operation, and the measurement frequency at that point becomes the durability frequency of the sheet sensor S,
It is possible to immediately know the test result (the limit number of times the prescribed weight is applied).

Further, in this embodiment, the wiring 13 of the output circuit of the seat sensor S is also connected to the input circuit of the motor M via the electric control box C, and when the seat sensor S is disconnected. , The motor M is stopped so that the device does not perform unnecessary operation.

In the test apparatus as described above, the motor M
When the disk 4 is rotated in one direction by driving, the disk 4
Further, since the rotation axis 5 of the cylinder 6 whose one end is rotatably attached is at a position eccentric from the rotation axis 3 of the disc 4, the cylinder 6 changes its vertical position.

Therefore, one end is attached to the inside of the cylinder 6, and the other end of the chain 7 hanging down from the open end of the cylinder 6 also goes up and down, but the hanging part of the chain 7 reaches the other end. Since it is gently sandwiched by the guide roller 8, the position in the horizontal direction is restricted at that position, and the chain 7 below the guide roller 8 is
The position of the guide roller 8 is a fixed point in the horizontal direction, and the guide roller 8 moves up and down along a vertical line passing through the fixed point. In this way, the weight 10 attached to the lower end of the chain 7 moves up and down along the vertical line passing through the fixed point, and the load of the weight 10 is reliably applied to the sheet sensor S.

Here, in order to apply the total load of the weight 10 to the sheet sensor S, the disk 4 of the elevating device is rotated, and the weight 10 is moved up and down according to the above-mentioned principle, and the disk 4 is moved.
The weight 10 is placed on the buffer plate 12 before the rotary shaft 5 of the cylinder 6 attached to the cylinder 6 reaches the position of the lowest point (bottom dead center) thereof, and thereafter, the cylinder 10 is delayed. It is necessary to set the length dimension of the chain 7 so that the rotary shaft 5 reaches its lowest point (bottom dead center).

In this embodiment, the lifting and lowering of the weight 10 converts the rotary motion of the rotating mechanism driven by the motor into the vertical motion by the above-described structure, and the weight 1 is moved.
Although 0 is moved up and down, a linear motion mechanism such as a cylinder or a ball screw is used so that the sliders are arranged so as to operate in the vertical direction, and the weight 10 is hung with a string on the slider. It can also be carried out by a method of raising and lowering.

[0024]

According to the test apparatus of the present invention, it is possible to know the limit number of times of repeated load of the sheet sensor,
The life of the sheet sensor can be determined by the number of times of application.

[Brief description of drawings]

FIG. 1A is a perspective view of a test apparatus of an embodiment, and FIG. 1B is an enlarged view of a part thereof.

[Explanation of symbols]

1 stand 3 Horizontal rotation axis 4 discs 5 Second rotation axis 6 cylinders 7 chains 8 guide rollers 10 weights 11 table 12 cushion 13 Sheet sensor output circuit wiring 14 Sensor for measuring the number of times of load application M motor S seat sensor

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshiaki Suzuki             1-7-10 Kikuzumi, Minami-ku, Nagoya City Stock Association             Auto Network Technology Laboratory F term (reference) 2G061 AA13 AB04 AB05 BA15 CB20                       DA01 DA07 EA01 EB03

Claims (4)

[Claims] 1. A device for testing the durability of a seat sensor, which is mounted on a seat of an automobile and detects whether or not a person is seated on the seat, against repeated application of a load applied during seating, The weight is held and lowered by the mounting table of the sheet sensor and the sheet sensor mounted on the mounting table, and the sheet sensor is mounted at a fixed point in the horizontal direction on the sheet sensor so that the total load of the weight is obtained. And a lifting device for the weight, wherein the state in which only the load is applied to the fixed point and the state in which the load is not applied to the fixed point by repeating the lifting of the weight are alternately repeated,
An endurance test device for a sheet sensor, comprising a measuring means for measuring the number of times of lifting and lowering of the weight by the lifting device. 2. The durability test apparatus for a sheet sensor according to claim 1, wherein a cushioning member is provided on an upper surface of the sheet sensor placed on the placing table. 3. The wiring of the output circuit of the sheet sensor,
Each time the seat sensor detects a load by connecting to the wiring of the input circuit of the load application frequency measurement sensor, the load application frequency measurement sensor transmits a pulse, and the generated pulse signal and the load applied to the seat sensor. The durability test apparatus for a sheet sensor according to claim 1 or 2, wherein the number of times the load is applied is measured by taking an AND circuit of the pulse signal generated by the application. 4. The wiring of the output circuit of the seat sensor is connected to the wiring of the input circuit of the drive unit of the lifting device, and the lifting device is automatically stopped by the disconnection of the seat sensor. Claim 1 to 3 characterized in that
The durability test apparatus for a sheet sensor according to any one of 1.