JPH0415885B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a motion sensor device, and more particularly to a motion sensor that detects and outputs when a member, such as a car, has been tilted at a predetermined angle or more for a predetermined period of time or more. Regarding equipment.

<Prior art> Detects the tilt and shaking of parts such as cars,
There is a motion sensor device that outputs a switching signal when these exceed a predetermined size. Such a motion sensor device is effective for use in preventing car theft.

FIGS. 9 and 10 are explanatory diagrams of the configuration of a conventional motion sensor device. In this motion sensor device, a sealed container 12 is disposed within a case 11, and mercury 13 is placed in the container. Electrodes 11a and 11b are attached to the case 11, and each electrode is connected to the battery BT via a resistor R or directly. The container 12 has a dish part 12a made of a conductive material, a lid part 12b similarly made of a conductive material, and an insulating part 12c that electrically insulates between the dish part and the lid part. The electrode 11b and the lid portion 12b are electrically connected to the electrode 11a through lead wires 14, respectively. In addition, when detecting the inclination of the member with high sensitivity, the inclination angle θ of the insulating portion 12c is determined as shown in FIG.
(θ=θ _H ), and if the sensitivity is desired to be lowered, the inclination angle θ of the insulating portion 12c is increased (θ=θ _L >θ _H ) as shown in FIG.

Now, when the motion sensor device is horizontal, the mercury 13 exists in the dish portion 12a as shown in FIGS. 9A and 10B, and no electrical circuit is formed. However, if the motion sensor device is tilted and its inclination angle θ exceeds θ _H or θ _L , mercury 13 will be deposited on the insulating portion 1 as shown in FIG. 9B or FIG. 10B.
2c and an electrical circuit is formed. Therefore, by monitoring whether an electrical closed circuit is formed, it can be determined that the tilt angle of the motion sensor device has exceeded a predetermined angle.

<Problems to be Solved by the Invention> Incidentally, in conventional motion sensor devices, differences in sensitivity are achieved by changing the inclination angle θ of the insulating portion. However, this method has the disadvantage that sensitivity cannot be adjusted continuously, and moreover, sensitivity to tilt and vibration cannot be adjusted independently.

In light of the above, an object of the present invention is to provide a motion sensor device that can continuously adjust the sensitivity and can independently adjust the tilt detection sensitivity and the shake detection sensitivity.

<Means for Solving the Problems> The motion sensor device of the present invention includes a sensor unit that monitors whether the inclination of a member (for example, a vehicle body) is at least a predetermined angle and outputs a pulse signal when the inclination is at least a predetermined angle. and monitors whether the pulse width of the pulse signal is longer than a predetermined time, and if it is longer than a predetermined time, outputs a signal indicating that the inclination of the member has continued for a predetermined time or longer at a predetermined inclination angle or more. and an adjustment circuit that adjusts the time width of the predetermined time.

<Function> Voltage value output from the sensor attached to the car
Compare V _D and a predetermined set voltage value _VR . still,
The voltage value V _D output from the sensor is a value that corresponds to the magnitude of the tilt or shaking of the vehicle, and the smaller the tilt, the larger the value. Also, the set voltage value V _R
is a value corresponding to a predetermined inclination or magnitude of shaking. Therefore, if V _D > V _R , it can be recognized that the vehicle is tilted or swayed by a predetermined angle or less, and if V _D ≦V _R , it can be recognized that the vehicle is tilted or swayed by a predetermined angle or more. However, this alone cannot determine whether the vehicle has been tilted at a predetermined angle or more for a predetermined period of time or longer. Therefore, it is made possible to detect whether or not the time during which V _D ≦V _R continues for a predetermined time _TR or more, and also to be able to adjust the time _TR .

As described above, by setting the predetermined time _T
By shortening T _R , it is possible to detect whether the short cycle swing exceeds a predetermined angle.

By the way, in the case of large shaking, the time period during which V _D ≦VR _R becomes longer. Therefore, the predetermined time
By adjusting T _R , the magnitude of the shaking to be detected can be changed, in other words, the shaking detection sensitivity can be adjusted.

<Example> FIG. 1 is a block diagram of a motion sensor device of the present invention, and FIG. 2 is a configuration diagram of the sensor.

In FIG. 1, reference numeral 101 denotes a member to which a motion sensor device is attached, such as a sensor that outputs a tilt signal SLS having a voltage value V _D corresponding to the tilt angle of the vehicle, and 102 a voltage value V corresponding to a predetermined tilt angle. 103 is a comparator that monitors the magnitude of V _D and V _R and generates a pulse signal AOV that is inverted according to the magnitude; 104 is a comparator that outputs a setting signal ASS having _R ; 104 is a comparator that monitors the magnitude of V D and VR; 105 is a pulse generation circuit that outputs a pulse signal TSS having a predetermined time width from the falling time of the pulse signal AOV;
106 is a time width adjustment circuit that adjusts the pulse width of the pulse signal TSS, and 107 is a circuit that calculates the logical product of the pulse signal AOV and the pulse signal TSS to detect whether the car is continuously tilted or the shaking of the car exceeds a predetermined angle. This is an AND gate that outputs a detection signal ATOV indicating . The angle setting section 102 is composed of, for example, a variable resistor VR1, and the pulse generation circuit 1
05 is composed of, for example, a monostable multi-circuit, and the time width adjustment circuit 106 is connected to the pulse generation circuit 10.
It consists of a series circuit of a variable resistor VR2 and a capacitor C that changes the time constant of 5.

The sensor 101 is connected to a magnet 101 as shown in FIG.
Pendulum 10b in which a is embedded and fulcrum case 1
01c, a pendulum fulcrum shaft 101d attached to the fulcrum case 101c, and a bracket 101e.
The magnetic resistance element 101f attached to the bracket 101e directly below the pendulum in the vertical direction, the centering member 101g serving as a centering fulcrum of the bracket 101e, the plunger 101h, and the head of the plunger 101h are biased to press against the bracket. A spring 101i, a coil 101j that pulls the plunger 101h upward when energized, and a sensor case 101.
k. 201 is the car body, 20
2a, 202b connect the sensor case 101k to the vehicle body 2.
This is a fixing screw to be attached to 01. Incidentally, depending on the resistance change of the magnetoresistive element 101f, the slope signal SLS
(Fig. 1) The circuit portion that generates the signal is omitted.

The bracket 101e is centered in advance and the sensor 101 is set to a standby state. Note that this centering adjustment is performed as follows. That is, the car is kept stationary, and in this state the coil 101j
A current is passed through. If current flows, plunger 101
h overcomes the spring force of the spring 101i and rises, and the bracket 101e becomes free, with the centering member 101g serving as a centering fulcrum and the entire bracket oriented vertically. Thereby, the magnet 101a embedded in the pendulum 101b opposes the magnetoresistive element 101f. In this state, when the current flowing through the coil 101j is reduced to zero, the plunger 101h is biased by the spring 101i and presses down the head of the bracket 101e with its head, and the sensor 101 enters a standby state.

Thereafter, if the vehicle body 201 tilts or shakes at an angle θ, the pendulum fulcrum shaft 1 will shift as shown in FIG.
The pendulum 101b swings at an angle θ about 01d from the dotted line position to the solid line position, and the magnet 101a embedded in the pendulum 101b is connected to the magnetoresistive element 101.
Leave f. The movement of the pendulum 101b is detected by the magnetic resistance element 101f, and a tilt signal SLS having a voltage value V _D according to the tilt or swing of the pendulum, in other words, the tilt or swing of the vehicle body.
is output as shown in FIG. 4A. Note that a circuit portion (not shown) of the sensor 101 is configured such that the voltage value V _D of the tilt signal SLS becomes smaller as the tilt angle becomes larger. Therefore, the predetermined inclination angle θ _S
By setting the voltage V _R according to the above-mentioned inclination angle θ S and identifying the magnitude of V _D and V _R , it is possible to determine whether the actual tilt angle is equal to or larger than the set tilt angle θ _S. In the example of FIG. 4, when V _D ≦V _R , the pulse signal AOV (FIG. 4B) becomes low level.

Below, the tilt and sway detection operations are shown in Figures 1 and 2.
The explanation will be given with reference to the diagram and the waveform diagrams of FIGS. 5 and 6.

Adjust the variable resistor VR1 of the angle setting unit 102 in advance to obtain a voltage value V _R corresponding to the tilt angle ±θ _S of the vehicle body.
is applied to the first input terminal of the comparator 103. Also, the variable resistor of the time width adjustment circuit 106
VR2 is adjusted so that the pulse signal TSS having a predetermined time width _TR is outputted from the pulse generation circuit 105.

Vehicle body 201 (Fig. 1) In other words, pendulum 101
When b swings as shown in FIG. 5A, sensor 1
A slope signal SLS whose voltage value V _D changes from 01 to 01 as shown in FIG. 5B is outputted to the comparator 113.
is applied to the second input terminal of.

Comparator 113 compares V _D and set voltage value _VR , and outputs a pulse signal AOV whose pulse width changes depending on the magnitude. If V _D > V _R , the pulse signal AOV becomes high level (“1”), and V _D
If ≦V _R , it becomes a low level (“0”).

Pulse signal AOV is detected by falling detection circuit 104
The falling edge detection circuit 104 detects the falling edge of the pulse signal AOV (arrow A in FIG. 6).
is detected, a trigger pulse PT is generated, and applied to the pulse generation circuit 105. That is, the fall detection circuit 104 detects whether the vehicle body is tilted at a predetermined tilt angle ±θ _S
A trigger pulse PT is generated every time the value exceeds PT.

Immediately upon application of the trigger pulse PT, the pulse generating circuit 105 generates a pulse signal TSS having a predetermined time width _TR . That is, the pulse signal
TSS becomes "0" after time _TR has elapsed.

AND gate 107 has pulse signal AOV “0”
, and the pulse signal TSS is “0”, the detection signal
Generate ATOV. That is, and gate 1
07 is when the vehicle body is tilted at a tilt angle of θ _S or more, and the set time is
If it is tilted continuously for more than T _R , a low level detection signal ATOV is output.

From the above, if the time width adjustment circuit 106 is adjusted so that the set time T _R is relatively long, the detection signal
By monitoring ATOV, it is possible to identify whether the tilt of the vehicle body continues for a relatively long time and exceeds ±θ _S. Then, by adjusting the angle θ _S by the angle setting unit 102, the detection sensitivity of the tilt of the vehicle body that continues for a relatively long time can be adjusted.

In addition, if the time width adjustment circuit 116 is adjusted so that the set time T _R is shortened, it is possible to identify whether the vibration of the vehicle body with a short cycle exceeds ±θ _S by monitoring the detection signal ATOV. .
In the case of large shaking, the time when V _D ≦ V _R will be longer, so by adjusting the set time width T _R , the shaking detection sensitivity can be adjusted without affecting the tilt detection sensitivity. .

FIG. 7 is a block diagram of another embodiment of the present invention;
The figure is a waveform diagram of each part. Note that the same parts as in FIG. 1 are given the same reference numerals.

In Figure 7, when V _D ≦ V _R , the low level;
Pulse signal that becomes high level when V _D > V _R
AOV is generated from comparator 103 in the same manner as in FIG. The delay circuit 301 is a pulse signal
When AOV is at a high level (V _D > V _R ), the signal DS of a constant voltage value E is output, and when the pulse signal AOV is at a low level (V _D ≦ V _R ), the time width adjustment circuit 10 is output.
It is configured to output a signal DS that decreases the voltage value with a time constant set by 6. Further, the comparator 302 monitors the magnitude of the set voltage V _S set by the voltage setting circuit 303 and the voltage value V _T of the signal DS output from the delay circuit 301, and when V _T ≦ V _S , a low level detection signal is output. Output ATOV.

Now, when the actual tilt angle of the vehicle body is less than the predetermined tilt angle, the pulse signal AOV is at a high level, the capacitor C of the time width adjustment circuit 106 is charged, and as a result, the voltage value E is output from the delay circuit 301. A signal DS is output. Therefore, when the actual tilt angle of the vehicle body is less than the set angle, V _T > V _S
The detection signal ATOV is at a high level.

However, when the actual tilt angle exceeds the set tilt angle, the charge stored in the capacitor C of the time width adjustment circuit 106 is discharged with a predetermined time constant, so the voltage value V _T of the output signal DS of the delay circuit 301 decreases. do. The voltage value V _T of the signal DS becomes smaller as the time period during which the vehicle body inclination angle is equal to or greater than the set inclination angle increases. Therefore, if the discharge continues for more than the set time T _R , V _T ≦ V _S and the comparator 30
A low level detection signal ATOV is output from 2,
It is identified that the actual inclination angle of the vehicle body is greater than or equal to a predetermined inclination angle and has continued for a predetermined time or longer.

In the embodiment shown in FIG. 7, the time may be adjusted by adjusting the variable resistor VR2 of the time width adjustment circuit 106, or by adjusting the set voltage value V _S in the voltage setting circuit 303. It's good to wear.

The above is a case where the sensor 101 shown in FIG. 2 is used, but the present invention may also use the sensor shown in FIGS. Replace with the sensors shown in Figures 9 and 10.

<Effects of the Invention> As explained above, according to the present invention, there is provided a sensor unit that monitors whether the inclination of a member (for example, a vehicle body) is at least a predetermined angle, and outputs a pulse signal when the inclination is at least the predetermined angle; A detection circuit that monitors whether the pulse width of the pulse signal is longer than a predetermined time, and outputs a signal indicating that the inclination of the member continues for a predetermined time or longer at a predetermined inclination angle or more if the pulse width is longer than a predetermined time. In addition, since the motion sensor device is configured by providing an adjustment circuit for adjusting the time width of the predetermined time, it is possible to affect the sensitivity of shaking detection and the sensitivity of tilt angle detection by adjusting the time width. It was possible to make continuous adjustments without any problems.
Further, a sensor attached to a member outputs a signal according to the inclination of the member, and a sensor that monitors whether the output signal of the sensor reaches a predetermined level or higher corresponding to the predetermined angle, and if the output signal of the sensor exceeds a predetermined level. A sensor unit is configured with a detection circuit that outputs a pulse signal, and tilt detection sensitivity can be continuously adjusted by adjusting a setting level.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention, FIG. 2 is a configuration diagram of a sensor used in the present invention, FIGS. 3 and 4 are schematic explanatory diagrams of the present invention,
5 and 6 are time charts explaining the present invention, FIG. 7 is a block diagram showing another embodiment of the present invention, FIG. 8 is the same time chart, and FIGS. 9 and 10 are conventional diagrams. FIG. 2 is an explanatory diagram of a motion sensor device. 101...Sensor, 102...Angle setting section, 1
03... Comparator, 104... Fall detection circuit, 105... Pulse generation circuit, 106...
Time width adjustment circuit, 107...AND gate, 30
1...Delay circuit, 302...Comparator, 30
3... Voltage setting circuit.

Claims (1)

[Claims] 1. A sensor unit that monitors whether the inclination of a member is at least a predetermined angle and outputs a pulse signal when the inclination of the member is at least a predetermined angle, and whether the pulse width of the pulse signal is at least a predetermined time. a detection circuit that monitors the angle of inclination of the member for a predetermined time or more and outputs a signal indicating that the inclination of the member continues for a predetermined time or more at a predetermined inclination angle or more. 2. The sensor section includes a sensor that is attached to a member and outputs a signal according to the inclination of the member, and monitors whether the output signal of the sensor reaches or exceeds a predetermined level corresponding to the predetermined angle, and adjusts the output signal to a predetermined level. The motion sensor device according to claim 1, further comprising a detection circuit that outputs a pulse signal in the above cases. 3. The motion sensor device according to claim 2, further comprising an adjustment circuit that adjusts the predetermined level. 4. The motion sensor device according to claim 1 or 2, further comprising an adjustment circuit that adjusts the time width of the predetermined time.