JPH04104515U - motion sensor - Google Patents

Abstract

(57) [Summary] [Purpose] A conductive ball and a pressure-sensitive conductive rubber installed inside a regular tetrahedron provide a linear output with no critical point for tilt detection. The present invention provides a motion sensor that can be obtained with one device. [Structure] Pressure-sensitive conductive rubber is provided on the inner plane of the regular tetrahedron, and the conductive ball is supported by this pressure-sensitive conductive rubber. Changes in pressure on the pressure-sensitive conductive rubber are detected by changes in resistance due to changes in the center of gravity of the conductive ball due to tilting. Now the tilt can be detected.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to motion sensors, especially for very slow tilting motions. Regarding motion sensors suitable for tilted objects whose tilt direction must be detected. do.

0002

[Prior art]

As a conventional motion sensor, for example, one with the structure shown in FIG. 9 is provided. was.

0003 In the figure, 10 is the pendulum, 10a is the slit, 11 is the photo sensor, and 12 is the shaft. .

0004 The structure of the motion sensor is that a fan-shaped pendulum 10 has a shaft 12 attached to the main part. It is designed to move in the direction of the arrow with this lever as the central axis. In addition, axis 12 is attached to and supported by a tilted object (not shown).

[0005] In addition, a plurality of slits 10a are arranged in the arc portion of the pendulum 10 on a line starting from the axis 12. A photo sensor 11 is provided facing the slit 10a.

[0006] The motion sensor configured as above performs tilt detection by supporting the shaft 12. When the tilted object to be detected tilts, the fan-shaped pendulum 10 will move so as not to go against gravity. However, the photo sensor 11 tilts along with the tilted object. Therefore, there is a relative misalignment between the photosensor 11 and the pendulum 10, and the pendulum 10 is The photo sensor 11 crosses the slit portion 10a, and the photo sensor 11 is slit. The presence or absence of an inclination was detected by passing light through the cut 10a.

[0007]

[Problem that the idea aims to solve] However, in the conventional example described above, as shown in FIG. Although it is possible to detect changes in the posture of the tilted object, the critical point due to its structure is There is a problem that the output of the photosensor 11 is not linear if you hold it, and Since the tilt detection direction is only one direction, if you want to detect the tilt in multiple directions, please use several The drawback was that a motion sensor was required.

[0008] This idea was made in view of the above points, and its purpose is to Eliminates the drawbacks of conventional models and can accurately detect the slow tilt of objects to be detected. In addition, we provide a motion sensor that can also detect the direction of inclination. It is in.

[0009]

[Means to solve the problem]

The motion sensor of this invention consists of a movable body (such as a pendulum) and a movable body such as a pendulum. It consists of a sensor that detects changes in position or center of gravity. In motion sensors that detect changes in the posture of tilted objects (e.g. vehicles, etc.) , the movable object is composed of a conductive sphere, and the sensor has a positive electrode circumscribed to the sphere. It is made of pressure-sensitive conductive rubber placed on the plane of a tetrahedron, and the regular tetrahedron is Pressure-sensitive conduction caused by a change in attitude of an attached tilted object (e.g. vehicle) By converting changes in the characteristics of rubber, etc. into electrical signals, it is possible to detect tilted objects (e.g. vehicles). It is now possible to detect minute and slow inclinations, as well as the direction of the inclination. It is composed of

0010

[Effect]

According to this invention, a movable body (for example, a pendulum, etc.) and a change in the position of this movable body or It consists of a sensor that detects changes in the center of gravity, and a tilted object ( For example, in a motion sensor that detects changes in the posture of a vehicle, etc., the movable object is composed of a conductive sphere, and the sensor has a regular tetrahedral plane circumscribed to the sphere. It consists of pressure-sensitive conductive rubber placed on top, and a regular tetrahedron is attached. Characteristics of pressure-sensitive conductive rubber, etc. caused by changes in the posture of the tilted object (e.g. vehicle) Since the change in sex is converted into an electrical signal, tilt detection can be performed very slowly. It becomes possible to detect the inclination of objects and the direction of the inclination.

[0011]

【Example】

Examples of the motion sensor according to this invention will be explained based on FIGS. 1 to 8. Ru.

0012 Figure 1 is a perspective view of the pressure-sensitive conductive rubber removed from the conductive bulb, and Figure 2 is the motion sensor. Figure 3 is a cross-sectional view of the structure viewed from the top when used as a motion sensor for a vehicle. Figure 4 is a diagram showing the positional relationship between the pressure-sensitive conductive rubber and the conductive bulb viewed from the top. Pressure-sensitive conductive rubber, conductive bulb, and body viewed from the horizontal direction when used as a motion sensor. 5 is an equivalent circuit diagram when the configuration shown in FIG. 4 is used, Figure 6 is a characteristic diagram of the pressure-sensitive conductive rubber, and Figure 7 is a block diagram for processing the circuit output in Figure 5. 8 is a flowchart of circuit output processing.

[0013] In the figure, 1 is a conductive ball, 2 is a pressure-sensitive conductive rubber, 3 is a regular tetrahedron, and 4 is a conductive sheet. 5 is a printed circuit board, 6 is a motion sensor signal control device, 7 is a car security 8 is a theft signal transmitter.

[0014] To explain the structure of the motion sensor, the three planes inside the regular tetrahedron 3 A pressure-sensitive conductive rubber 2 is attached to the center part with a printed circuit board 5 as a base. , the conductive ball (for example, iron ball) 1 is guided by the pressure-sensitive conductive rubber 2 in three directions. It is supported via an electric sheet 4.

[0015] Therefore, the conductive bulb 1 is in contact with the pressure-sensitive conductive rubber 2 in three directions via the conductive sheet 4. Electrically, each pressure-sensitive conductive rubber 2 is electrically conductive via the conductive sheet 4 and the conductive bulb 1. state, and this conductive sphere is connected to the conductive rubber from the remaining one surface other than the above three surfaces. One electrode has been taken out.

[0016] In addition, the connection surface between the pressure-sensitive conductive rubber 2 and the printed circuit board 5 is in contact with the printed circuit board 5 side. It has a round pattern and is electrically led to the outside from the printed circuit board 5. The sea urchin is turning.

[0017] A circuit diagram of a motion sensor with the above structure is shown in Figure 5. Each pressure-sensitive conductive rubber 2 in the regular tetrahedron 3 is used as a resistor 2a, 2b, and 2c, respectively. , the 2x part is the conductive bulb 1 itself, and in reality, this 2x part is a conductor with a resistance of 0Ω. It becomes rubber and is output to the outside of the regular tetrahedron 1 via the printed circuit board 5.

[0018] A resistor R is connected to the resistors 2a, 2b, 2c of each pressure-sensitive conductive rubber 2, and the conductive body A constant voltage power supply CV is connected to the 2x part of 1, and the resistors 2a, 2b, 2c and the resistor R are connected. The points represent each output.

[0019] Therefore, the resistors 2a, 2b, 2c made of the pressure-sensitive conductive rubber 2 and the resistor R constitute a voltage dividing circuit. However, if the resistance values of the resistors 2a, 2b, and 2c of the pressure-sensitive conductive rubber 2 change due to pressure, the output will occur. A voltage value corresponding to the change in resistance value is obtained for the force.

[0020] The resistance value of the pressure-sensitive conductive rubber 2 has the characteristics shown in FIG. The resistance value decreases as the pressure applied to the rubber 2 increases.

[0021] In this way, as the resistance values of the resistors 2a, 2b, and 2c of each pressure-sensitive conductive rubber 2 change, , when the regular tetrahedron 3 is tilted in any direction, the internal conductive sphere 1 is in the tilted direction. Pressure is applied by the pressure-sensitive conductive rubber 2, reducing the resistance value and outputting it, so the slope is This means that it is possible to detect the direction of inclination.

[0022] To explain the case where a motion sensor with the above structure is installed in a vehicle. , as shown in FIGS. 3 and 4, when the front side of the vehicle is lifted, the conductive bulb 1 becomes pressure sensitive. Gravity moves to the resistors 2b and 2c of the conductive rubber 2, and the pressure decreases against the resistor 2a. As a result, the resistance values of the resistors 2b and 2c decrease, and the resistance value of the resistor 2a increases.

[0023] In addition, if the rear of the vehicle tilts, pressure is applied to the resistor 2a and the resistance value decreases. The resistance values of bodies 2b and 2c begin to increase.

[0024] Furthermore, if the vehicle tilts laterally, the resistance value of resistor 2a does not change and resistor 2b or 2c The resistance value will decrease.

[0025] Application of motion sensor that operates as above to car security system To explain an example with reference to FIGS. 7 and 8, the resistance of each pressure-sensitive conductive rubber 2 of the regular tetrahedron 3 is Outputs 1, 2, and 3 obtained by converting resistance changes into voltage values are sent to the motion sensor signal control device 6. input and is added to the input port of the microcomputer through a low-pass filter. It will be done.

[0026] The input port of the microcomputer is connected to the armier than the car security system. An alarm signal is input to the car security system from the output port. A command signal is output, and a theft transmission command signal is further sent to the theft signal transmitter.

[0027] Next, the operation within the motion sensor signal control device 6 will be explained using the timing chart shown in FIG. The explanation will be based on the following.

[0028] When this device starts operating, an arming signal is sent from the car security system 7. is input (step S1), and determines that it is in the arming state. If so, the output voltage data from the three pressure-sensitive conductive rubbers 2 is stored in the memory.

[0029] That is, output data 1 that detects the tilt in the forward direction of the vehicle is stored in memory 1 (M ₁ ), and the absolute value of the difference between the other two output data is stored in memory 2 (M ₂ ). Step S2).

[0030] Next, a timer flag is set and the timer is started (step S3).

Then, the data stored in the memory 1 is compared with the set value (D ₁ ) stored in the memory (step S4), and if the output data 1 is equal to the set value (D ₁ ), or more, a theft transmission command signal is sent to the theft signal transmitter 8 to transmit a theft signal (step S5).

If, as a result of the comparison in step S4, the data stored in memory 1 is smaller than the set value (D ₁ ), the absolute value of the difference between output data 2 and output data 3, that is, memory 2 (M ₂ ), is The stored data is compared with the setting value (D ₂ ) stored in the memory (step S6), and it is determined whether the data stored in memory 2 (M ₂ ) is equal to the setting value (D ₂ ). If it is more than that, an alarm command signal is sent to the car security system 7 to perform an alarm operation (step S7).

[0033] If the data stored in memory 2 is smaller than the set value (D ₂ ) as a result of the comparison in step S6, it is checked whether the timer that started operating in step S3 has ended (step S8), and the timer is If the timer flag has been completed, the timer flag is released (step S9), and the flow returns to step S2 to move on to the operation of loading the next new slope data into the memory.

[0034] If the timer has not expired yet, the flow returns to step S4 and changes the set value. Continue the comparison.

[0035] In addition, the camera may - Check whether the security system 7 is disarmed ( Step S10), if the disarm state is reached, the flow returns to step S1, If the state is not disarmed, the flow returns to step S4 to compare data. Continue.

[0036] If you try to steal a vehicle and jack up the rear of the vehicle as described above, the output data will be The number of data 1 increases and transmits a theft signal, and the police, etc., who receive this signal become dispatched. If a thief gets into a vehicle with the intention of breaking into the vehicle, the vehicle will be completely damaged from the front and rear. Since it tilts from side to side instead of tilting to the left and right, output data 2 and 3 change and an alarm is activated. This means that the thieves can be chased away.

[0037]

[Effect of the idea]

According to the motion sensor according to this invention, since it is configured as described above, the following It has a similar effect.

[0038] Since the pressure-sensitive conductive rubber is placed on the plane of a regular tetrahedron circumscribing the conductive sphere, it The movement of the conductive sphere due to the inclination of both objects becomes very smooth, and the motion sensor is activated. This has the effect of making the force characteristics linear without a critical point.

[0039] In addition, it is economical in terms of cost because it can detect the front, back, left, and right inclinations with a single sensor. It has the effect of

[0040] Furthermore, there is an effect that the direction of inclination can also be detected from the three output data.

[0041] Moreover, it has a simple structure and can be constructed at low cost, making it easy to implement. It has excellent features such as ease and mass production.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the pressure-sensitive conductive rubber of this invention removed from the conductive bulb.

FIG. 2 is a cross-sectional view of the structure of the motion sensor seen from above.

FIG. 3 is a diagram showing the positional relationship between the pressure-sensitive conductive rubber and the conductive bulb when viewed from above.

FIG. 4 is a diagram showing the positional relationship between the pressure-sensitive conductive rubber, the conductive bulb, and the conductive rubber when viewed from the horizontal direction.

FIG. 5 is an equivalent circuit diagram of a motion sensor.

FIG. 6 is a characteristic diagram of pressure-sensitive conductive rubber.

FIG. 7 is a block diagram for processing circuit output of pressure-sensitive conductive rubber.

FIG. 8 is a flowchart of circuit output processing.

FIG. 9 is a perspective view showing a conventional motion sensor.

[Explanation of symbols]

1 Conductive bulb 2 Pressure-sensitive conductive rubber 3 Tetrahedron 4 Conductive sheet 5 Printed circuit board 6 Motion sensor signal control circuit 7 Car security system 8 Theft signal transmitter

Claims (1)

[Scope of utility model registration request] Claim 1: An object to be tilted (for example, a vehicle, etc.) that is composed of a movable body (for example, a pendulum, etc.) and a sensor that detects changes in the position or center of gravity of this movable body, and to which this movable body is attached. In a motion sensor for detecting changes in posture, the movable object is composed of a conductive sphere, and the sensor is composed of pressure-sensitive conductive rubber or the like arranged on the plane of a regular tetrahedron circumscribing the sphere. A regular tetrahedron is attached to the tilted object (for example, a vehicle), and by converting the changes in the properties of the pressure-sensitive conductive rubber, etc., caused by changes in the posture of the object (e.g., a vehicle) into electrical signals, the tilted object can be detected minutely and slowly. What is claimed is: 1. A motion sensor characterized in that the motion sensor is configured to be able to detect an inclination, and also detect the direction of the inclination.