JPS60166817A - Inclination detector - Google Patents

Abstract

PURPOSE:To obtain a slope detector for an automobile with a high detection accuracy which is limited in the effect of acceleration and deceleration with an excellent vibration resistance and durability by arranging a mechanical-electric converter for converting a pressure into an electrical signal between the case inner wall and the weight. CONSTITUTION:An inclination detector 1 is arranged with a computer into which the output of the inclination detector, wheel speed and acceleration are inputted, a display unit and the like to construct a slope detector for an automobile. This detector comprises a weight 11, a rectangular case 12 housing the weight 11 tightly inside and a floor direction pressure detector 13 as a mechanical-electric converter arranged between the weight 11 and the case 12 to convert into an electrical signal the pressure as floor direction pressure Pd of the weight 11 as detected with a piezo-electric element, a strain gauge and the like. X indicates the ongoing direction of the automobile. When the automobile is stopped or parked on a slope at the angle theta of inclination, with a starter key ON, the floor direction detector 13 detects 401 the floor direction pressure Pd to calculate 402 the angle theta of inclination by the formula.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field] The present invention relates to a tilt detector for detecting the tilt of a moving or installed load.

[Prior Art] Conventionally, there have been methods for detecting the inclination of a vehicle traveling on a slope, etc. 1, a potentiometer type, which electrically detects the amplitude of the suspension 61, and a zigzag type. has excellent detection accuracy, but has a complicated structure and is expensive.
The potentiometer type has a simpler structure than the ditrometer type, but it has the disadvantage of being affected by acceleration and deceleration and has low detection accuracy.

[Object of the Invention] An object of the present invention is to provide a tilt detector that has a simple structure, is less affected by acceleration and deceleration, and has a good detection value of V4 degrees.

[Structure of the Invention] The inclination detector of the present invention is arranged between a case, a weight tightly housed in the case, and the inner wall of the case and the weight, and is arranged to reduce the pressure between the weight and the inner wall of the case. Voltage (electromotive force)
, and a mechanical-electrical converter that converts electrical resistance into electrical signals. This inclination detector is mounted on, for example, an automobile, and together with a computer that receives the output vehicle speed J3 and acceleration as input, a display device, etc., constitutes an automobile slope detection device.

[Effects of the Invention] Due to the above-mentioned configuration, the tilt detector of the present invention has the following effects.

b) It has a cylindrical structure, consisting of a case and a weight, and a mechanical-electrical converter that converts pressure into an electrical signal, placed between the case inner wall and the weight, and is robust, compact, and vibration-resistant. It has excellent durability and can be manufactured at low cost. Detection accuracy is good because the effects of acceleration and deceleration can be reduced.

口) Due to its excellent durability, it can be used maintenance-free and redundantly as a lens.

[Embodiment] The inclination detector of the present invention will now be described with reference to an embodiment shown in the drawings.

FIG. 1 shows a first embodiment of the invention.

In this embodiment, the inclination detector 1 of the present invention is installed in an automobile, and together with a computer, a display device, etc., which inputs the output of the inclination detector, vehicle speed, and acceleration, constitutes a slope detection device for an automobile. . A weight 11, a rectangular parallelepiped case 12 in which the weight 11 is tightly housed, and a pressure sensor disposed between the weight 11 and the case 12 to detect the floor surface pressure Pd of the weight 11 using a piezoelectric element, strain gauge, etc. Floor direction pressure horn detector 13, which is a mechanical-electrical converter that converts into an electrical signal
It consists of

(X) is the direction of travel of the car.

FIG. 2 shows a second embodiment of the invention.

In this embodiment, the inclination detector 2 of the present invention includes a weight 21, etc.
A rectangular parallelepiped case 22 in which the weight 21 is tightly housed, a forward pressure detector 23 for detecting the forward pressure Pf of the weight 21, and a backward pressure detector 23 for detecting the backward pressure (]b of the weight 21). It consists of a container 24.

FIG. 3 shows a third embodiment of the present invention.

In this embodiment, the inclination detector 3 of the present invention includes a weight 31, etc.
A rectangular parallelepiped case 32 that tightly houses the housing 31 therein, and a forward direction pressure detector 33 that detects the forward direction pressure P[.
, a backward direction pressure detector 34 that detects the backward direction pressure 1)b, and a floor direction J1 force detector 35 that detects the floor direction pressure horn Pd.

FIG. 4 shows a fourth embodiment of the invention.

In this embodiment, the tilt detector 4 of the present invention includes a weight 41, etc.
A rectangular parallelepiped case 42 in which the weight 41 is tightly housed in a V4 manner.
Furthermore, the forward direction pressure detector and the backward direction pressure detector of the second embodiment are combined into a forward direction H force detector 46.
In this case, it is sufficient to install one on either the forward or reverse side of the vehicle.

FIG. 5 shows a fifth embodiment of this embodiment.

In this embodiment, the inclination detector 5 of the present invention has a spherical slope 51.
A forward direction pressure detector 53, a backward direction pressure detector 54, and a floor direction pressure detector 55 are provided using the following.

FIG. 6 shows a sixth embodiment of the present invention. In this embodiment, the inclination detector 6 of the present invention includes a spherical weight 61, and the weight 6.
1, a triangular pyramid-shaped or triangular +1-shaped case 62, a forward direction pressure detector 63, and a backward direction pressure detector 64.
and a floor direction pressure detector 65.

FIG. 7 shows a seventh embodiment of the invention.

In this embodiment, the inclination detector 1 of the present invention includes a weight 11, a straight body case 72 in which the weight 71 is tightly housed, a floor direction pressure detector 15, and a forward direction pressure detector 16.

Furthermore, the present invention is not limited to the shape of the melon, the shape of the container, the direction of the pressure system, etc. of these Examples.

Next, the operation of the inclination detector of the present invention shown in FIG.
The principle will be explained based on FIGS. 8 to 10.

When the acceleration of the car is a (speed increase a > O, deceleration a < O1, constant speed a = O), on a flat road, as shown in Figure 7, the weight of the weight 71 is in the direction of the floor. It costs only. The force due to the acceleration of the car (acting in the direction of travel).

[]d: Floor direction pressure] PI): forward pressure W: Small load g double force acceleration polishing a: acceleration There is a table size relationship between the thorns and these using the following equation.

;, Pd = W - (+ , ', I) b = W - a Actually l) b is when the car is decelerating, the force due to the acceleration of the car is applied in the opposite direction (progressing direction) as shown in Fig. 7, Here, it is assumed that a force W-a<0 is applied in the direction shown in FIG. As shown in FIG. 8, when climbing a slope with an inclination angle e, the load on the vehicle 71 is divided into two parts in the downhill direction and in the backward direction, and the force due to the acceleration of the vehicle is applied only in the forward direction. As a result, the force applied to the advancing direction pressure detector 16 is:
Floor direction Pd = W-g-cosθ Traveling direction Pb =%%”g -5in e+W-a When going down a slope with an inclination angle of φ, the load on the restraint 71 is divided into the downward direction of the vehicle body and the forward direction. In order to unify the direction of the force, the direction of the force is set in the backward yi direction as shown in Figure 9.
I took a minus. The acceleration of a car is only applied in the direction of travel. As a result, the force applied to the forward #'jh direction pressure detector 7G is in the advancing direction Pb --W-g -sin
As shown in e+W-a floor direction I]d=W-g-cosθ]-, the floor direction pressure Pd is determined only by the load 0 of the weight 71 and the (E1 inclination angle) and is not affected by acceleration.

FIG. 10 is a block diagram.

The forward direction pressure pb is detected by the forward direction pressure detector 76 (201), and the acceleration (a) is detected by a vehicle speed detection device and a differential circuit device or an acceleration detection device (202). Formula 0 Formula % Close out the oblique angle (θ') (204). Also, from both sides, Pb-W-a>o... Downhill Pb - W-a = 0... Flat 1] b - W-a < O... 61 steps uphill to detect uphill or downhill. (205)
Furthermore, the floor surface pressure Pd is detected by the floor self-pressure horn detector 75. 301) The angle (e) is expressed by the formula θ-cos −
'Stop from Pd/wg 302), then the angle (
φ) is determined by comparing 0 with e′ calculated in (204) (3(13)).

Next, the operation of the tilt detector of Ichiki's invention shown in FIG. 1 will be explained.

FIG. 11 is a block diagram using the first embodiment.

When the car is stopped or running on a slope with an inclination angle (θ), pressing the starter key 0N1J will activate the floor direction detector 1.
3 to detect the floor surface pressure Pd (401), and calculate the inclination angle (θ) using the formula e=cos(Pd/w−Q) (402).

Next, the operation of the inclination detection device of the present invention shown in FIG. 4 will be explained.

FIG. 12 is a block diagram C when the fourth embodiment is used.

In this embodiment, a device for detecting the acceleration <a> is required to calculate the inclination angle (θ).

The traveling direction pressure Pb is detected by the traveling direction pressure detector 46 501) The acceleration (a) is detected by the acceleration detector or the vehicle speed detecting device and the differential circuit device 502
), both are expressed as the equation of inclination angle (e) θ-5inIPb -w
-a/WgI, and calculate the inclination angle (θ) (C) (503).

FIG. 13 shows a block diagram of the fourth embodiment for detecting whether the vehicle is currently on a 0 slope or on a downward slope.

The traveling direction pressure Pb is detected by the traveling direction pressure detector 46 601), and the acceleration (a) is detected by the acceleration detector ν and the vehicle speed detecting device and the differential circuit device 602
), PI from both) -W-a > O...downhill Pb -W-a = 0...flat F] b-W-a < 0...uphill Perform detection (603)
FIG. 14 is a block diagram in which the fourth embodiment calculates the launch and uphill slope of the slope angle (e).

The pressure in the forward direction 1j (in the traveling direction) is detected by the 10,000 detector 46 (701), and the acceleration (a) is detected by the acceleration detector or the vehicle speed detection device and the differential circuit device (702).
), and both are expressed as the equation of inclination angle (θ) θ=sin l p1+
-w -a /WN gives tt19, and the inclination angle (e)
Squeeze out (703). Also, Pl+ -W-a > 0...downhill Pb -W-a = O...flat Pb -W-a < 0...uphill is calculated to detect uphill or downhill (704)

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a first embodiment of the tilt detector of the present invention, FIG. 2 is a schematic diagram of a second embodiment of the tilt detector of the present invention, and FIG.
The figure is a schematic diagram of a third embodiment of the tilt detector of the present invention, FIG. 4 is a schematic diagram of a fourth embodiment of the tilt detector of the present invention, and FIG. 5 is a schematic diagram of a fifth embodiment of the tilt detector of the present invention. FIG. 6 is a schematic diagram of a sixth embodiment of the tilt detector of the present invention, FIG. 7 is a schematic diagram of a seventh embodiment of the tilt detector of the present invention, and FIG. 8 is a schematic diagram of a seventh embodiment of the tilt detector of the present invention. FIG. 9 is a diagram of the operation principle of the seventh embodiment of the tilt detector of the present invention. FIG. 10 is a diagram of the operation principle of the seventh embodiment of the tilt detector of the present invention. 11 is a block diagram of the operating principle of the first embodiment of the inclination detector of the present invention, and FIG. 12 is a block diagram of the operating principle of the first embodiment of the inclination detector of the present invention.
FIG. 13 is a block diagram of the operating principle of the fourth embodiment of the tilt detector of the present invention, and FIG. 14 is a block diagram of the operating principle of the fourth embodiment of the tilt detector of the present invention. be. In the figure 1.2.3.4.5.6.7... Tilt detector
11.21.31.41.51.61.71... Weight 12.22.32.42.72... Rectangular parallelepiped case
62...Triangular prism case 13.35.55.65.7
5... Floor pressure detector 23.33.53.63.
・Forward direction pressure detector 24.34, j)4.64・
...Reverse direction pressure detector 46.7G...Progress direction pressure detector representative Kenji Ishiguro Fig. 1 Fig. 4 Fig. 2 Fig. 51゛a' Figure 12 (503) Figure 13

Claims (1)

[Claims] 1) Inclination detection comprising a case, a weight tightly housed in the case, and a mechanical-electrical converter arranged between the inner wall of the case and the weight and converting pressure into an electrical signal. vessel. 2) The inclination detector according to claim 1, wherein the mechanical-electrical converter is a planar pressure detector that converts pressure into electricity 1f.