JP3156486B2 - Airbag system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag system which operates by detecting acceleration when a vehicle collides.

[0002]

2. Description of the Related Art Conventionally, acceleration sensors for an airbag system are individually adjusted for each acceleration sensor based on detailed and strict specifications (a narrow allowable range and a small tolerance) from a set manufacturer (automobile manufacturer). Had to be done. For example, the output per 1 G of acceleration is 10 mV
With respect to the specification of ± 3%, the above-mentioned specification cannot be satisfied due to the parts constituting the acceleration sensor and the variation at the time of assembly. Therefore, the conventional acceleration sensor requires components for sensitivity adjustment and a circuit on which these components are mounted in order to absorb the variation in sensitivity caused by the variation of each sensor. The sensitivity was adjusted to a range that satisfied the above and was delivered to the set maker.

[0003]

However, the above-mentioned conventional acceleration sensor has a problem that components and circuits for adjusting the sensitivity are required for each sensor, and the acceleration sensor becomes expensive. Since the sensitivity or the real number of the output is unknown on the set manufacturer side, there has been a problem that the adjustment accuracy on the set manufacturer side deteriorates.

An object of the present invention is to solve the above-mentioned conventional problems and to provide an inexpensive airbag using an excellent acceleration sensor capable of high-accuracy sensitivity adjustment without requiring components and circuits for sensitivity adjustment. System .

[0005]

According to the present invention, in order to achieve the above object, the sensitivity or output value corresponding to a predetermined acceleration by a vibrator is adjusted without adjusting the sensitivity for each acceleration sensor. A display means for displaying on the acceleration sensor is provided.

[0006]

The present invention has the above-described structure, and does not require a sensitivity adjustment component and circuit in the acceleration sensor. Therefore, an acceleration sensor that is less expensive than the conventional one can be obtained.
On the set maker side ( airbag controller), by reading the display of the sensitivity or output value of the acceleration sensor and making adjustments based on this value, the allowable range of individual variations of the acceleration sensor can be made wider than before, and furthermore, The sensitivity can be adjusted with high accuracy using an oscillator, a level meter, etc., without requiring an expensive vibrator.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. 1 to 3 show the configuration of the acceleration sensor main body. FIG. 1 is a side view, FIG. 2 is a front view, and FIG. 3 is a bottom view. In the figure, reference numeral 1 denotes a main body of the acceleration sensor, and the inside of the main body 1 is composed of an element or the like that generates an electrical output corresponding to the acceleration. 2 is the main body 1
The label 2 has a barcode display of the sensitivity or output of each acceleration sensor, or a rank obtained by classifying them. Reference numeral 3 denotes a plate provided at two places on the main body 1. The plate 3 is used by a set maker to fix the acceleration sensor to a set such as an airbag controller via a tapping 4. 5 are lead pins formed at a predetermined pitch, and these lead pins 5 are directly attached to a set-side substrate or the like. As described above, the main body 1 and the plate 3
The acceleration sensor 6 is composed of the lead pin 5 and the lead pin 5.

Next, the operation of the above embodiment will be described. After assembling the inside of the main body 1 and forming the lead pins 5, an electric signal obtained through the lead pins 5 corresponding to a predetermined acceleration by a vibrator or the like is measured, and the sensitivity, output or these of the acceleration sensor 6 are ranked. A label 2 displaying the divided ranks and the like as bar codes is attached to the side surface of the main body 1. Labels 2 which are displayed as bar codes corresponding to the sensitivity or the like of the individual acceleration sensors 6 are attached.
The acceleration sensor 6 having the label 2 attached thereto is delivered to a set maker. The set maker reads the sensitivity or the real number of the output value displayed on the acceleration sensor 6, and adjusts the sensitivity according to these characteristics using an oscillator, a level meter, or the like. In this case, by adjusting based on the sensitivity or the real number of the output value, the allowable range of the variation of the acceleration sensor 6 can be made wider than before. For example, the output per 1 G of the conventional acceleration is 10 m
In the case where the specification of V ± 3% is adjusted by the set maker based on the sensitivity of the acceleration sensor 6 or the real number of the output value, the allowable range of the variation of the acceleration sensor 6 is set to be per 1 G of acceleration. Output is 10mV ± 20%
Can be extended to

As described above, according to the above-described embodiment, the circuit and parts for adjusting the sensitivity required for the conventional acceleration sensor are not required, and the acceleration sensor 6 has only the function as a transducer. It becomes possible to make it cheap. In addition, by displaying the sensitivity on each of the acceleration sensors 6, the set maker can read the display of the acceleration sensor without using an expensive vibrator, and with high accuracy using an oscillator, a level meter, or the like. The sensitivity can be adjusted.

Also, the acceleration sensor 6 is set on the set maker side.
Of the acceleration sensor 6 or the real number of the output value, the allowable range of variation of the acceleration sensor 6 can be made wider (larger tolerance) than before.

In the above embodiment, the sensitivity or the output of the acceleration sensor 6 is indicated by a bar code on the label 2.
Is affixed to the side surface of the main body 1, but the bar code display may be printed directly on the side surface of the main body 1, and other display which can be read by a set maker instead of the bar code display. Depending on the mode, the same effect as in the above embodiment can be obtained.

Although the display in the above embodiment displays the sensitivity or the real number of the output value, a number or a symbol corresponding to the real number may be displayed.

Further, by displaying the sensitivity or output of the acceleration sensor in a classified manner, the sensitivity can be adjusted more efficiently and accurately on the set side.

[0014]

According to the present invention, as is apparent from the above embodiments, the sensitivity or output value is displayed on each acceleration sensor without individually adjusting the sensitivity or output of the acceleration sensor. Since components and circuits for sensitivity adjustment are not required for the acceleration sensor, an inexpensive acceleration sensor having a wider tolerance range than before can be provided, and the set maker side ( airbag controller) can be used. Also, by reading the real number display of the sensitivity or output value of the acceleration sensor, there is an effect that the sensitivity can be adjusted with high accuracy by an oscillator, a level meter, or the like without requiring an expensive vibrator.

Further, by displaying the sensitivity or the output of the acceleration sensor in a classified manner, the sensitivity can be adjusted more efficiently and accurately on the set side.

[Brief description of the drawings]

FIG. 1 is a side view of an acceleration sensor according to an embodiment of the present invention.

FIG. 2 is a front view of the acceleration sensor according to the embodiment.

FIG. 3 is a bottom view of the acceleration sensor according to the embodiment.

[Explanation of symbols]

 1 Body 2 Label 3 Plate 4 Tapping 5 Lead pin 6 Acceleration sensor

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) G01P 15/00 G01P 15/08-15/135 B60R 21/32 G06K 7/00

Claims (4)

(57) [Claims] An acceleration sensor for displaying a sensitivity or an output value corresponding to a predetermined acceleration by a vibrator;
Adjust according to the sensitivity or the output value of the sensor
Air with an airbag controller having an adjustment unit
Bag system. 2. The method according to claim 1, wherein the sensitivity or the output value is adjusted to
The airbag system according to claim 1 , wherein a barcode is displayed on the degree sensor . 3. The airbag system according to claim 1 , wherein said sensitivity or said output value is classified and said rank is displayed on said acceleration sensor.
Tem . 4. A real of the sensitivity or the output value,
4. The airbag system according to claim 1, wherein the airbag system is displayed by a number or a symbol corresponding to the real number.
Tem .