JP3134793B2 - Seismic device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic device installed in a gas meter, a gas shutoff device or the like to detect an earthquake.

[0002]

2. Description of the Related Art Conventionally, this kind of seismic device is disclosed in
No. 48634 has been known. Less than,
The configuration will be described with reference to FIG.

[0003] As shown in FIG. 17, a ball 3 is rollably housed in a box 2 having a concave conical bottom surface 1, and is held slidably in the vertical direction by an inner lid 4 of the box. The lower surface of the disk 5 is brought into contact with the upper surface of the ball 3 by the weight of the disk 5,
A plunger 6 provided on the upper surface of the disk 5 is connected to a switch mechanism 7
And the switch mechanism 7 is operated by the upward movement of the disk 5.

In the above configuration, when the box 2 vibrates, the ball 3 rolls on the conical bottom surface 1 from the center to the end. At this time, since the distance between the bottom surface 1 and the concave spherical surface of the disk 5 is small at a position closer to the end from the center, the plunger 6 is pushed up by the ball 3 having this distance, and the contact 8 is turned on.

[0005]

However, in the above-mentioned prior art, vibration can be detected, but the magnitude of the vibration is not known. When the box was tilted, the switch mechanism worked to detect the tilt, but could not detect the degree of tilt. Then, since the movement of the ball 3 is different by tilting, there is a problem that the detection accuracy of the vibration is deteriorated.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a piezoelectric vibration detecting means for detecting a vibration acceleration and an earthquake discriminating means for discriminating whether or not an earthquake has occurred from signal data of the vibration detecting means. First output means for outputting a result of the determination by the earthquake determination means; and electrical characteristics of the vibration detection means.
The apparatus is provided with a tilt detecting means for detecting a degree of tilt of the vibration detecting means from the change, and a second output means for outputting a detection result of the tilt detecting means.

According to the above invention, a piezoelectric vibration detecting means is provided.
To detect two information, vibration acceleration and inclination
be able to.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention detects vibration acceleration.
Piezoelectric vibration detection means, earthquake determination means for determining whether or not an earthquake has occurred from the signal data of the vibration detection means, first output means for outputting the determination result of the earthquake determination means, and electrical control of the vibration detection means It is provided with a tilt detecting means for detecting a degree of tilt of the vibration detecting means from a change in the characteristic, and a second output means for outputting a detection result of the tilt detecting means. Then, the vibration acceleration from pressure telegraphic communication of piezoelectric vibration detection means
Can be detected and changes in the electrical characteristics of the piezoelectric vibration detection means
One degree of vibration detection means
Can detect two pieces of information.

In addition, there is provided a fluid transport line, a shut-off means for shutting off the transport line, and a drive means for driving the shut-off means by first or second output means. And
When a predetermined inclination is detected, the pipeline is shut off.
Thus, it is possible to prevent the flow rate measurement with reduced accuracy.

Further, the electrical resonant frequency detecting means for detecting an electric resonance frequency of the piezoelectric vibration detection means, the inclination detecting means for detecting the inclination of the vibration detection means from the signal obtained by the electrical resonant frequency detecting means Equipped. And
The inclination can be detected by detecting a change in the electric impedance by the electric resonance frequency detecting means.

In addition, the forced vibration means for forcibly vibrating the vibration detection means , and the mechanical resonance frequency of the vibration detection means are set to an electric potential.
There are provided a mechanical resonance frequency detecting means for detecting as a mechanical characteristic, and an inclination detecting means for detecting an inclination of the vibration detecting means from a signal obtained by the mechanical resonance frequency detecting means. Then, the inclination can be detected by forcibly vibrating and detecting the change of the natural vibration frequency due to the vibration by the mechanical resonance frequency detecting means.

Further, a forced vibration means is provided for applying a voltage to the vibration detecting means to forcibly vibrate. And the piezoelectric vibration
The inclination can be detected by the mechanical resonance frequency detecting means from the response vibration in which the piezoelectric element is bent by applying a voltage to the detecting means for a short time.

Further, the vibration detecting means is configured to vibrate by using the blocking means as the forced vibration means. Then, the inclination can be detected by a predetermined method from the change in the natural frequency using the vibration generated by operating the blocking means.

Further, there is provided a tilt detecting means for detecting a tilt from a vibration generated at the time of forced vibration, comprising a liquid or a solid which oscillates in contact with the vibration detecting means. Then, the inclination can be detected by a predetermined method from a change in the natural frequency caused by the vibration means touching the oscillating liquid or solid.

Further, an automatic check means for performing an automatic check is provided. Further, an automatic check means for automatically checking the inclination periodically is provided. Then, by performing the automatic check periodically, the inclination can be detected before a large inclination occurs, and the inclination can be automatically detected without manually performing the check.

Further, the apparatus further comprises a post-detection check means for automatically checking the inclination after the vibration detection means detects the vibration.
Then, when the vibration is detected, the inclination can be reconfirmed to check whether the detected vibration level is correct.

Further, the apparatus is provided with inclination detecting means for detecting an inclination based on a signal ratio as compared with a reference signal.

Further, there is provided an inclination detecting means for comparing the positive vibration and the negative vibration to detect the degree of inclination. Since the inclination is detected by comparing the vibration levels of the positive vibration and the negative vibration as the reference signal when the vibration detecting means is inclined, the apparatus can detect the inclination without additional means.

Further, there is provided an inclination detecting means for detecting an inclination from detection signals of a plurality of vibration detecting means.

Further, there are provided vibration detecting means arranged in two orthogonal directions, and tilt detecting means for detecting a tilt from the two vibration detection signals. Then, by using a plurality of vibration detecting means, it is possible to detect the inclination in any of the two horizontal directions.

Further, a sensitivity correction means for correcting the vibration acceleration detection sensitivity of the vibration detection means based on the tilt information is provided. Then, by correcting the detection level of the vibration detecting means from the inclination information, the vibration level can be detected with high accuracy.

Further, there is provided a notifying means for notifying the inclination history in accordance with the signal of the inclination detecting means. By notifying the history, the current state of the vibration and the tilt of the vibration detecting means can be known, and the past vibration detection level and the tilt data can be corrected.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Embodiment 1 FIG. 1 is a block diagram of a seismic device according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 9 denotes vibration detection means for detecting vibration acceleration, 10 denotes earthquake discrimination means, 11 denotes first output means, 1
2 is a tilt detecting means, 13 is a second output means, 14 is a gas pipe as a fluid transport line, 15 is a gas shutoff valve as a shutoff means, 16 is a driving means of the gas shutoff valve, and 17 is a tilt notifying means. is there. Further, as shown in FIG. 2, the vibration detecting means includes a vibration plate 18 as a vibration means, a piezoelectric element 19,
The support portion 22 includes a weight portion 20 and an elastic body portion 21.
, An electrode 23, a lead wire 24 and a detection circuit 25. Further, as shown in FIG.
Comprises an electric signal source 26, a periodic check unit 27, a frequency analysis unit 28, a resonance detection unit 29, a slope calculation unit 30, a slope determination unit 31, and a sensitivity correction unit 32.

Next, the operation and operation will be described with reference to FIGS.
This will be described with reference to FIG. As shown in FIG. 2, the vibration sensing device of the present invention is installed so that the diaphragm 18 hangs on the support portion 22. Therefore, if the support portion 22 is inclined by some influence, as shown in FIG. Meanwhile, the diaphragm 18 is warped by the weight of the weight portion 20. As a result, distortion occurs in the piezoelectric element 19, and the impedance as an electrical characteristic changes. Then, the change in the impedance is measured using the voltage applied from the electric signal source 26. That is, when an SIN signal is output as an electric signal from the electric signal source 26 and its frequency is swept, as shown in FIG. 6, the voltage between both ends of the piezoelectric element 19 becomes maximum where the impedance is high. The frequency at the maximum is measured by the frequency analysis means 28 and the resonance detection means 2
At 9, the resonance frequency is detected. The inclination calculating means 30 for comparing the resonance frequency f2 with the resonance frequency f1 as a reference signal calculates the degree of inclination. Then, when the degree of inclination becomes equal to or more than the predetermined angle, an output signal is output from the second output means 22 and the gas cutoff valve 15 is closed.

As described above, even in acceleration detecting means such as a piezoelectric element, which cannot detect a static distortion amount, the inclination can be detected by detecting a change in the electric resonance frequency, and the occurrence of an earthquake can be detected. Detection and inclination detection due to falling of the vibration detecting means can be performed, and gas can be cut off at the time of disaster, so that disaster can be prevented before it occurs. It is obvious that the same applies to the capacitance type and the strain resistance type. Further, since the detection sensitivity of the vibration acceleration can be corrected by detecting the inclination, the vibration acceleration can be accurately detected even in the inclined state, and as a result, the detection accuracy of the earthquake can be improved. In addition, since the diaphragm is installed so as to be hung by the elastic body and the weight is installed at the bottom, it can be tilted even with a slight shake, and the sensitivity of tilt detection can be improved. .
Further, if the inclination is manually checked, calibration at the time of installation can be easily performed.

The detection of the inclination is performed at every first predetermined time interval (for example, 24 hours). Then, the sensitivity of the vibration acceleration is corrected from the tilt check measured 24 hours later, and if the measured tilt is smaller than a predetermined angle (eg, 10 °), the next first predetermined time (eg, 24 hours later) stand by. Further, even if this repetition is performed for a second predetermined time (for example, six months of six months), if the measured inclination is less than a predetermined angle (for example, 10 °),
Next, a periodic check is performed at 30-day intervals so that the elapsed time waits for less than a third predetermined time (for example, 30 days). If the inclination is equal to or more than the predetermined angle, a command to close the gas shutoff valve is issued, and a periodic check is performed again as a first predetermined time (for example, 24 hours) based on the measurement interval. did.

As a result, by performing the automatic check periodically, the inclination can be detected before a large inclination occurs, and the inclination can be detected without manually performing the check. At first, the inclination is monitored at short intervals, but when the inclination does not greatly change in six months, the monitoring interval is set to 30 days and monitoring is performed. Wear can be reduced.

As described above, by performing the automatic check periodically, the inclination can be detected before a large inclination occurs, and the inclination can be automatically detected without manually performing the check. .

Furthermore, when the gas shut-off means 15 is closed, the inclination notifying means 17 can inform the user of the inclination, so that the cause of the gas shut-off can be immediately clarified and the history of the tilt from the past is notified. It is possible to understand when it happened, and to observe the installation state of the seismic device such as tilting or swaying even when gas shutoff does not occur.

(Embodiment 2) FIG. 7 is a configuration diagram showing a seismic device according to Embodiment 2 of the present invention. The difference from the first embodiment is that an electric signal source 26 as forcible vibration means, a post-detection check means 33 for giving an operation command to the electric signal source 26, and a positive / negative vibration analysis means 34 are provided.

Next, the operation and operation will be described with reference to FIGS. First, the signal detection circuit 25 includes the piezoelectric element 1
9 at a predetermined level or higher (for example, 200 cm /
s2). Then, when a signal larger than that is measured, the signal is transferred to the positive / negative vibration analyzing means 34 as signal detection. Thereafter, the after-detection check means 33 operates the electric signal source 26 to forcibly vibrate the piezoelectric element 19. Here, a pulse voltage signal is generated from the electric signal source 26 to distort the piezoelectric element 19 for a moment, the reverberation of the distortion is detected by the signal detection circuit 25, and the signal is transferred to the positive / negative vibration analysis means 34. . As shown in FIG. 9, when the vibration waveform of the reverberation vibration has no slope, the peaks P1 and P2 of the vibration waveform have substantially the same level, but when there is a slope, the peaks P1 and P2 are as shown in FIG. It will be a different value. The degree of inclination is calculated from the ratio between the peaks P1 and P2. That is, the inclination angle = K * (P
1 / P2). Here, K is a slope coefficient. Correction of the measurement sensitivity and correction of the vibration acceleration level are performed based on the tilt angle which is the degree of tilt. When the inclination angle is less than the predetermined angle, the state returns to the vibration monitoring state, and when the inclination angle is more than the predetermined angle, the gas is shut off.

As described above, the piezoelectric element is vibrated using the electric signal source as the forced vibration means, and the inclination is calculated by detecting the change in the mechanical resonance frequency from the reverberation vibration, thereby detecting the inclination. At the same time, the detection sensitivity of the vibration acceleration can be corrected according to the degree of inclination to improve the detection accuracy. Further, even when a phenomenon such as an earthquake, which is not known when the inclination occurs, is always checked after the vibration is detected, data in which the inclination state is corrected is always obtained, so that the measurement accuracy is very high. Further, by calculating the inclination from the positive and negative vibration levels, the inclination can be detected without any additional means.

Similar effects can be obtained by using a gas shutoff valve 15 as a shutoff means as shown in FIG. 11 as the forced vibration means. That is, it can be realized by replacing the electric signal source 26 shown in FIG.
The gas shutoff valve 15 includes an electromagnetic coil 35 and a permanent magnet 36.
And a spring 37. Then, the vibration generated when the gas cutoff valve 15 is closed by the electric signal vibrates the piezoelectric element 19 as a vibration detecting means attached to the case 38 surrounding the electromagnetic coil 35. Since the vibration is a reverberation vibration as shown in FIGS. 9 and 10, the inclination can be calculated as described above. After calculating the slope, the gas shut-off valve is opened immediately so that gas can be transported.
In addition, even if the gas shutoff valve is not operated until it is closed, the electromagnetic force works and the valve tends to move even if it is energized for a moment. The piezoelectric element can be vibrated by the reaction. Since the piezoelectric element is hung by an elastic body, it can vibrate with a small force.

Further, as shown in FIGS. 12 and 13, it is also possible to adopt a configuration in which the liquid 40 is injected until the weight portion 20 is immersed in the case 39 supporting the piezoelectric body. That is, when the case 39 is tilted, the liquid 40 is offset as shown in FIG. 13 and does not reach the weight portion 20. At this time, the characteristics shown in FIGS. 14 and 15 can be measured by vibrating the piezoelectric element with the gas shut-off valve 15 which is the aforementioned forced vibration means. Therefore, the inclination can be calculated by analyzing the change in the resonance frequency of the diaphragm by the frequency analysis unit described in the first embodiment.

(Embodiment 3) FIG. 16 is a configuration diagram showing a seismic device according to Embodiment 3 of the present invention. The difference from the first embodiment is that two piezoelectric elements as vibration detecting means are provided, each of which has a maximum vibration sensitivity in the horizontal direction, and is arranged at a position orthogonal to each other. Here, reference numeral 41 denotes first vibration detecting means on which the piezoelectric element 19 is disposed, reference numeral 42 denotes second vibration detecting means on which the piezoelectric element 19 is disposed, and reference numeral 43 denotes the maximum sensitivity direction of each vibration detecting means.

Next, the operation and operation will be described. By arranging the piezoelectric elements in two directions perpendicular to the horizontal plane, it is possible to detect in which horizontal direction the liquid crystal element is tilted.
For example, the east-west direction is measured by the signal of the piezoelectric element 19 of the first vibration detecting means 41, and the north-south direction is measured by the second vibration detecting means 4.
By detecting with the signal of the second piezoelectric element 19, the tilt can be detected regardless of the direction in which the vibration detecting means is tilted, and the vibration acceleration level in any direction can be detected with high accuracy.

[0037]

As described above, according to the seismic device of the present invention, the following effects can be obtained.

A piezoelectric vibration detecting means for detecting vibration acceleration.
Discriminates whether or not an earthquake has occurred from the signal data of the step and the vibration detection means
And outputs the judgment result of the earthquake judgment means.
First output means, and electric characteristics of the vibration detection means.
An inclination detection method that detects the degree of inclination of the vibration detection means from the change
And a second output for outputting a detection result of the inclination detecting means.
With the provision of force means, the piezoelectric signal of the piezoelectric vibration detection means
The vibration acceleration can be detected from the signal and the piezoelectric vibration
The degree of inclination can be detected from the change in the electrical characteristics of the detecting means.
And one piece of vibration detection means detects two pieces of information.
be able to.

Further , a fluid transport pipe and the transport pipe are connected to each other.
A blocking means for blocking, and a second detection result of the inclination detecting means.
Driving means for driving the blocking means by the output means of (2)
By installing a filter, the pipeline is blocked when a predetermined inclination is detected.
Can prevent flow measurement with reduced accuracy.
You.

The electric resonance of the piezoelectric vibration detecting means
Electric resonance frequency detecting means for detecting a frequency;
Vibration detection from the signal obtained by the resonance frequency detection means
By providing a tilt detection means for detecting the tilt of the
Tilt that can detect changes in air impedance
Can be detected.

Further , the vibration detecting means is forcibly vibrated.
The mechanical resonance frequency of the forced vibration means and the vibration detection means is
Mechanical resonance frequency detecting means for detecting as a mechanical characteristic;
The vibration is obtained from the signal obtained by the mechanical resonance frequency detection means.
Providing tilt detecting means for detecting the tilt of the motion detecting means
It is possible to detect a change in the mechanical natural vibration frequency.
The change in the inclination can be detected.

Further , a voltage is applied to the vibration detecting means to force the vibration.
By providing forced vibration means for moving the piezoelectric element,
From the response vibration that is
The inclination can be detected from the change in the vibration frequency.

Also, the vibration is made by using the shut-off means as the forced vibration means.
Activating the blocking means by vibrating the detecting means
From the change in the natural frequency
The inclination can be detected by a fixed method.

Further, the liquid which oscillates upon contact with the vibration detecting means
Or equipped with a solid and tilted from vibration generated during forced vibration
Oscillating liquid by providing tilt detection means for detecting
Or the natural frequency due to the vibration means touching the solid
The inclination can be detected from the change by a predetermined method.

Also, the operation of the vibration detecting means is automatically checked.
Automatic check means to automatically check
Automatically without having to manually check it.
The inclination can be detected.

In addition, a self-checker that automatically checks the inclination periodically.
Automatic check periodically
This makes it possible to detect tilt before a large tilt occurs.
Can be.

After the vibration detecting means detects the vibration,
Provide a post-detection check means for automatically checking the tilt.
By checking the inclination again when vibration is detected,
Check that the vibration level issued is correct
Can be.

Further , the signal ratio is compared with the reference signal.
By providing tilt detection means for detecting tilt
The vibration level is compared as a reference signal when the output means is tilted.
The tilt is detected by performing
It can be a device that issues.

Further, the degree of inclination is determined by comparing the positive vibration and the negative vibration.
Vibration detecting means by providing a tilt detecting means for detecting
Of the positive and negative vibrations as reference signals when the
Since the inclination is detected by comparing the bells,
It can be Rukoto to a device for detecting an inclination to the teeth.

Also, the detection signals of a plurality of vibration detecting means are
By providing tilt detection means for detecting tilt from
Which of the two horizontal directions
Can also be detected.

Also, vibration detection arranged in two orthogonal directions
Means for detecting a tilt from the two vibration detection signals
The use of multiple vibration detection means.
Detection of the inclination in any two horizontal directions.
Can be.

Further, the vibration of the vibration detecting means is determined based on the tilt information.
Providing sensitivity correction means for correcting the dynamic acceleration detection sensitivity
To correct the detection level of the vibration detection means from the tilt information
Thus, the vibration level can be accurately detected.

Further , the inclination curve is changed according to the signal of the inclination detecting means.
Providing a means of reporting the history, and reporting the history
This shows the current state of vibration and tilt of the vibration detection means
Along with past vibration detection levels and tilt data.
Can be corrected.

[Brief description of the drawings]

FIG. 1 is a block diagram of a seismic device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a vibration detection unit of the apparatus.

FIG. 3 is a block diagram of the apparatus.

FIG. 4 is a flowchart illustrating the operation of the apparatus.

FIG. 5 is a configuration diagram of a vibration detection unit of the apparatus.

FIG. 6 is a characteristic diagram of a vibration detection unit of the apparatus.

FIG. 7 is a block diagram of a seismic device according to Embodiment 2 of the present invention.

FIG. 8 is a flowchart for explaining the operation of the apparatus.

FIG. 9 is a characteristic diagram of a vibration detecting unit of the apparatus.

FIG. 10 is another characteristic diagram of the vibration detecting means of the device.

FIG. 11 is a configuration diagram showing a forced vibration unit of the apparatus.

FIG. 12 is a configuration diagram showing vibration detection means of the device.

FIG. 13 is a configuration diagram showing a state in which a vibration detection unit of the device is inclined.

FIG. 14 is a characteristic diagram showing the operation of the apparatus.

FIG. 15 is another characteristic diagram showing the operation of the seismic device.

FIG. 16 is a configuration diagram of a seismic device according to Embodiment 3 of the present invention.

FIG. 17 is a configuration diagram of a conventional seismic device.

[Explanation of symbols]

 Reference Signs List 9 vibration detecting means 10 earthquake discriminating means 11 first output means 12 inclination detecting means 13 second output means 14 gas pipe as a transportation pipeline 15 gas shutoff valve as shutoff means 16 driving means 17 tilt notification means 18 vibrating means Vibration plate 19 piezoelectric element 20 weight 21 elastic body 26 electric signal source 27 periodic check as automatic check 29 resonance detection as electric resonance frequency detection 32 sensitivity correction 33 post-detection check 34 positive / negative vibration Analysis means

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-50754 (JP, A) JP-A-6-313797 (JP, A) JP-A-5-79895 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) G01H 1/00 G01C 9/00 G01H 11/08 G01V 1/18

Claims (16)

(57) [Claims] 1. A piezoelectric vibration detecting means for detecting a vibration acceleration, an earthquake determining means for determining whether or not there is an earthquake from signal data of the vibration detecting means, and a first output for outputting a determination result of the earthquake determining means. Means and electrical characteristics of the vibration detecting means
A seismic device comprising: a tilt detecting means for detecting a degree of tilt of the vibration detecting means from a change in the angle; and a second output means for outputting a detection result of the tilt detecting means. 2. A fluid transportation pipeline, a shutoff means for shutting off the transport pipeline , and a second detection result obtained by the inclination detection means.
The seismic device according to claim 1, further comprising a driving unit that drives the blocking unit by an output unit . 3. A piezoelectric electroacoustic resonance frequency detecting means for detecting an electrical resonance frequency of the vibration detecting means, the inclination detecting means for detecting the inclination of the vibration detection means from the signal obtained by the electrical resonant frequency detecting means The seismic device according to claim 1, further comprising: 4. The method according to claim 1, further comprising: forcing the vibration detecting means to vibrate the vibration detecting means ;
2. The apparatus according to claim 1, further comprising: mechanical resonance frequency detecting means for detecting the characteristic, and inclination detecting means for detecting an inclination of the vibration detecting means from a signal obtained by the mechanical resonance frequency detecting means.
The described seismic device. 5. The seismic device according to claim 4, further comprising forced vibration means for forcibly vibrating the vibration detection means by applying a voltage. 6. The vibration sensing device according to claim 4, wherein the vibration detecting means vibrates using the blocking means as the forced vibration means. 7. The seismic device according to claim 4, comprising a liquid or a solid that swings in contact with the vibration detecting means, and a tilt detecting means for detecting a tilt from the vibration generated during the forced vibration. 8. either the operation of the vibration detecting means from claim 1 with automatic check means for automatically checking 7 1
The seismic device described in the item . 9. The seismic device according to claim 8, further comprising automatic checking means for automatically checking the inclination periodically. 10. The seismic device according to claim 9, further comprising a post-detection checking means for automatically checking the inclination after the vibration detecting means detects the vibration. 11. The method of claim with a tilt detector for detecting a tilt by a signal ratio is compared with a reference signal 3 or 4
The described seismic device. 12. The seismic device according to claim 3, further comprising an inclination detecting means for detecting a degree of inclination by comparing the positive vibration and the negative vibration. From 13. The method of claim 1 which includes a tilt detection means for detecting an inclination from the detection signals of the plurality of vibration detecting means 13
The seismic device according to any one of the preceding claims. 14. The seismic device according to claim 13 , further comprising vibration detection means arranged in two orthogonal directions, and inclination detection means for detecting an inclination from the two vibration detection signals. 15. A sensitivity correction means for correcting the vibration acceleration detection sensitivity of the vibration detection means based on the information on the inclination.
15. The seismic device according to any one of 1 to 14 . 16. one of claims 1 to 15 with an informing means for informing the tilt history in response to a signal inclination detecting means
The seismic device according to claim 1 .