JPS61155912A - Apparatus for optical detection of angle of inclination - Google Patents

Abstract

PURPOSE:To accurately detect the tilting movement of an object to be detected, by correcting the information detected by a detection sensor on the basis of the information detected by an output setting sensor. CONSTITUTION:A detection sensor 2 for detecting the angle of inclination of a car body B and an output setting sensor 4 are provided in a casing 5. a central processing unit 9 applies operational processing to the standard sensor output signal Vo from the sensor 4 and the output signal V1 from the sensor 2 on the basis of the angle-of-inclination conversion coefficient f(Vo) read from a memory 91 and corrects the angle-of-inclination information of the car body B based on the signal V1 to calculate the accurate angle of inclination of the car body B and outputs the inclination data Do thereof to a diaplay apparatus 92. By this method, the tilting movement of the car body B(object to be detected) is accurately detected.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention mainly relates to an optical tilt angle detection device for detecting the tilt of an automobile body.

(Prior Art) In general, a tilt angle detection device for detecting the tilt of a vehicle body, for example, includes a reflector that swings in the vertical direction as the vehicle body tilts, is pivoted to the vehicle body, and is attached to the vehicle body. , an optical sensor is provided that includes a light emitting element that emits an optical signal toward the reflecting plate, and a light receiving element that receives the optical signal reflected by the reflecting plate, and the light receiving element receives light as the reflecting plate swings. A device has been developed that detects changes in the amount of light and detects the inclination of the vehicle body.

(Problems to be Solved by the Invention) As described above, when using an optical sensor consisting of a light-emitting element that emits an optical signal toward a reflector and a light-receiving element that receives the optical signal reflected by the reflector, In other words, the output signal from the optical sensor differs as the ambient temperature changes.

Specifically, the higher the ambient temperature, the larger the output signal output from the optical sensor. Accordingly, while the output signal output from the optical sensor changes as shown by the solid line (Ll) in FIG. Even though it is the same as above, the output signal output from the optical sensor changes as shown by the solid line (L2) in FIG. 5, and therefore,
In the detection device, the detected inclination angle may differ from the actual inclination angle due to differences in ambient temperature, making it impossible to accurately detect the inclination of the vehicle body as a whole.

However, the present invention was developed in view of the above problems, and its purpose is to always accurately detect the inclination angle of an object to be detected, such as a car, regardless of changes in ambient temperature. The objective is to provide an optical tilt angle detection device that can be used.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a movable reflector that swings in response to the tilting of an object to be detected, and a light emitting element that provides an optical signal to the reflector. and a light-receiving element that receives the reflected optical signal, and a detection sensor that detects the inclination angle of the object to be detected and whose output changes according to the swinging of the reflection plate, and a detection sensor that detects the inclination angle of the object to be detected. A fixed reflecting plate to be fixed, a light emitting element that provides a light signal to the reflecting plate, a light receiving element that receives the reflected optical signal, and an output setting sensor that sets a standard sensor output corresponding to the ambient temperature. It is.

(Function) According to the zero invention, by correcting the information detected by the detection sensor based on the information detected by the output setting sensor company, the detected object can be detected regardless of the ambient temperature. This allows for accurate detection of body tilt.

(Embodiment) An embodiment of the optical tilt angle detection device according to the present invention will be described below based on the drawings.

The angle detection device shown in the figure is for detecting the tilting of a car, and basically consists of a movable reflector (1) that swings in response to the tilt of the car body (B), and a movable reflector (1) that swings in response to the tilt of the car body (B). 1), a light emitting element (21) that emits an optical signal toward the reflector plate (1), and a light receiving element (22) that receives the optical signal reflected from the reflecting plate (1).
), the detection sensor (2) detects the inclination angle of the vehicle body, the output of which changes depending on the amount of light received by the light receiving element (22) as the reflection plate (1) swings; ) fixed reflector plate (3) fixed to the reflector plate (3);
A light emitting element (41) that emits an optical signal toward the light emitting element (41) and a light receiving element (42) that receives the optical signal reflected from the reflecting plate (3).
), and an output setting sensor (4) that sets a standard sensor output corresponding to ambient salinity according to the amount of light received by the light receiving element (42).

The above structural members (1), (2), (3), and (4) are incorporated into a casing (5) fixed to the connecting part of the vehicle body (B), and specifically, the first As shown in the figure,
A pair of bearing cylinder parts (51
) (52), and a rotary shaft (53) that rotates in the vehicle width direction is freely rotatably mounted between the bearing cylinder portions (51, 52), and a connecting rod (52) is provided on the rotary shaft (53). 10), the movable reflector (1) is suspended via a movable reflector (1) so that it swings relative to the casing (5) by its gravity as the vehicle body (B) tilts in the vehicle width direction; The fixed reflecting plate (
3) is fixed.

The fixing plate (3) is assembled into the casing (5) so that the vehicle body (B) is vertical when the vehicle body (B) is in a horizontal state (inclination angle of 0 degrees).

Further, brackets (20) and (40) are erected in the casing (5) at positions facing the movable reflector (1) and the fixed reflector (3), respectively, with a predetermined interval therebetween;
The detection sensor (
2) and an output setting sensor (4) are assembled.

Further, each of the detection sensor (2) to the output setting sensor (4) is connected to the reflection plate (1) or (
Light emitting elements (21) and (4) that emit optical signals toward
Infrared light emitting diodes are used as 1), and phototransistors are used as light receiving elements (22) and (42) that receive optical signals reflected from the reflecting plate (1) or (3).

Further, the output signals from the detection sensor (2) and the output setting sensor (4) having the above configuration are filtered by a low-pass filter (6a) (6b); (7) is sent to the central processing unit (9) via the A/D converter (8), and the central processing bag is calculated based on the tilt angle conversion coefficient stored in advance in the memory (91). (9), and the data of the tilt angle calculated by the arithmetic processing of the central processing unit (9) is displayed on the display device 2 (92).

Next, the operation of the above detection device will be explained based on the flowchart shown in FIG.゛First, since the fixed reflector (3) is fixed to the case (5), the positional relationship between the fixed reflector (3) and the output setting sensor (4) is as described above. It is always constant regardless of the tilting of the vehicle body (B), and therefore, the output setting sensor (4) outputs a standard value that corresponds to changes in ambient temperature, as shown by the broken line (L3) in Figure 5. The sensor output signal [VO] is output to the central processing unit (9) via the low-pass filter (6b).

On the other hand, as the vehicle body (B) tilts, as shown in FIG. The relative position with the detection sensor (2) changes, and accordingly, the light emitting element (2) of the detection sensor (2) changes.
21) The optical signal emitted from 1' has changed position.
It is reflected by the movable and counter-movable (1) in i
22) is outputted to the central processing unit (9) via the low-pass filter (6a).

The central processing unit (9) then outputs the standard sensor output signal [VO3] from the output setting sensor (4) and the output signal [VIKO7] from the sensor (2) for setting the output.
The output signal from reading (2) from the memory (91) [VL
] is corrected to determine the accurate inclination angle of the vehicle body (B), and the inclination data [DO] is output to the display device (92).

In the above embodiments, the tilting of the car is detected, but the present invention is not limited to detecting the tilting of the car.
For example, it is also possible to detect tilting of various vehicles such as trains.

(Effects of the Invention) As described above, according to the detection device according to the present invention, the inclination information of the detected object detected by the vehicle detection sensor is converted into information corresponding to the ambient temperature detected by the output setting sensor. Since the correction can be made based on the above, it has become possible to accurately detect the tilting movement of the object to be detected, regardless of changes in the ambient temperature.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional front view showing one embodiment of the detection device according to the present invention, Fig. 2 is a cross-sectional side view of the same, Fig. 3 is a block diagram thereof, and Fig. 4 is a central processing unit (9). The calculation flowchart, FIG. 5, is a graph showing the output characteristics of the detection sensor and the output setting sensor. (1)...Movable reflector (2)...Detection sensor (3)...Fixed reflector (4)...Output setting sensor ( B)...
...Vehicle body (object to be detected) Fig. 1 Fig. 2 Fig. 8 Fig. 4 θ° Pawn parking

Claims (1)

[Claims] It has a movable reflector that swings in response to the tilting of the object to be detected, a light emitting element that provides an optical signal to the reflector, and a light receiving element that receives the reflected optical signal, and that moves in response to the swing of the reflector. A detection sensor whose output changes and detects the inclination angle of the detected object is provided, a fixed reflecting plate fixed to the detected object, a light emitting element that provides an optical signal to the reflecting plate, and a reflected optical signal. What is claimed is: 1. An optical tilt angle detection device, characterized in that it has a light-receiving element that accepts a signal, and an output setting sensor that sets a standard sensor output corresponding to ambient temperature.