JPS5851628B2 - Earthquake observation equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for observing seismic information such as seismic waves in a remote location, and more particularly to an earthquake observation device that can utilize existing telephone lines for transmitting earthquake information.

Generally, in order to observe seismic waves and determine their onset time and epicenter, it is necessary to install seismometers at several observation points and measure the exact arrival time of seismic waves at each observation point.

Therefore, as a conventional means of observing earthquakes of this kind, a clock precisely set to absolute time is placed at each observation point, and the time signal of the clock is recorded in parallel with the seismic wave record. However, according to this method, due to the need to unify the time, the absolute time must be transmitted from one location to each observation point by wireless means etc. Moreover, there is a problem in that it takes time and effort to transmit the earthquake information at each observation point to the central information processing center or the like.

Furthermore, as another conventional means of earthquake observation, seismic waves that reach each observation point are recorded in one place using wireless or wired transport methods, and are also recorded in parallel on the same recorder, thereby reaching each of the above observation points. Measuring the slow velocity of seismic waves is being carried out.

In the above-mentioned means of intensively observing seismic waves in one place, a starting signal is generated only when an earthquake occurs to start the recorder and record the seismic waves. In order to avoid measurement errors caused by this recording means, a delay device is connected to the recorder, which delays the seismic wave signal by a certain period of time and inputs the signal to the recorder.

However, with the above-mentioned conventional means of intensively observing seismic waves at one location, it is uncertain which observation point the seismic waves will reach first when an earthquake occurs.
There is a problem in that the activation signal must always be detected even when the recorder is stopped other than when an earthquake occurs.

That is, in the case of a wireless carrier system, radio waves of a specific frequency must be occupied at all times, and in the case of a wire carrier system, there is a problem in that a dedicated cable line must be occupied.

The present invention aims to solve the above-mentioned problems, and uses existing telephone lines to transmit seismic information such as seismic waves from multiple observation points to a central information processing center, etc. only in the event of an earthquake. The object of the present invention is to provide an earthquake observation device that can send data to a receiving side and take a concentrated record with high measurement accuracy at the time of earthquake occurrence.

For this reason, the earthquake observation device of the present invention includes, at each of a plurality of earthquake observation points, an earthquake detector and a transmitting telephone with an automatic dialing device connected to the earthquake detector via a delay device. , an automatic receiving telephone connected to the transmitting telephone via an automatic telephone exchange and a telephone line, and a recorder connected to the automatic receiving telephone, and connected to the earthquake detector. a starting signal generator, and a time limit device that receives a signal from the starting signal generator and sends a control signal to the automatic dialing device. The feature is that the time is set to the sum of the maximum expected time from start to maximum movement and the delay time of automatic dialing.

Below, an earthquake observation device as an embodiment of the present invention will be explained with reference to the drawings. FIG. 1 is a system diagram of the transmitting side as an observation point, and FIG. 2 is a system diagram showing the entire system. On the transmitting side as 3e, there is a separate earthquake detector 1
．． 1' and 1'' are earthquake detectors i and 1'+ i, respectively.
A delay device 2.2' which delays the seismic wave information detected by a predetermined period of time is connected to a transmitting side telephone 4 with an automatic dialing device 3 via γ.

Furthermore, earthquake detectors i, 1', i'' and delay device 2゜2'
Amplifiers 5.5', 5'' are interposed between the delay devices 2.2', 2'1' and the transmitting telephone 4, respectively. 6', 6'', a mixer 7 and a coupling device 8 are interposed.

The coupling device 8 may include one that acoustically sends the earthquake information to the transmitting telephone 4 or one that directly transmits the earthquake information to the transmitting telephone 4 .

The sending telephone 4 is connected to an automatic telephone exchange 10 in the sending telephone office via an existing telephone line 9 such as a commercial telephone line. 11. It is connected via an automatic telephone exchange 12 in a telephone office on the receiving side and an existing telephone line 13 to an automatic receiving telephone set 14 such as an answering machine on the receiving side such as a central information processing center.

Additionally, the automatic answering telephone 14 is connected to a multi-channel recorder 15, such as a multi-pen recorder.

Further, a controller 16 is connected to the automatic reception type telephone 14 so as to activate the recorder 15 in response to the first call signal from the observation point that reaches the reception side first.

And amplifiers 5, 5' to the earthquake detectors 1.1', 1''.

A start signal generator 17 is connected to the start signal generator 17 via the start signal generator 17, and a time limit device 18 is connected to the start signal generator 17, which receives a signal from the start signal generator 17 and sends a control signal to the automatic dialing device 3. Due to the action of the time limit device 18, transmission to the receiving side is automatically stopped after a certain period of time has elapsed.

Furthermore, the transmitting side as each other observation point is also configured with the same equipment as the above-mentioned transmitting side, that is, the delay time of the delay device of each observation station is configured to be exactly the same, and the As shown in Figure 2, in order to send seismic wave information to the receiving side such as a central information processing center, transmitting side telephones 4' and l
are the existing telephone lines 9' and CJ', the automatic telephone exchanges 10' and 1σ' on the sending side, and the existing long-distance telephone line 1, respectively.
1′.

11'', receiving side automatic telephone exchange 12, existing telephone lines 13', 1?f and automatic receiving telephone set 14'.

It is connected to a recorder 15 via 11.

and each automatic reception type telephone 14', ie is the controller 1
6.

Therefore, the controller 16 is actuated to start the recorder 15 in response to a signal from the automatic receiving telephone that receives the first call from the transmitting side as an observation point.

If the transmitting side is located in the same telephone office as the receiving side, the transmitting side telephone (not shown) is directly connected to the automatic telephone exchange 12 on the receiving side, and the seismic wave information observed at the observation point is
As in the case described above, the information is conveyed to the recorder 15 via a telephone line and an automatic reception telephone (not shown).

Note that a multi-phenomenon recorder or a magnetic tape data recorder may be used as the recorder 15, or the recorder 15 may be connected to a computer for information processing.

Since the earthquake observation device of the present invention is configured as described above, when an earthquake occurs, the three-component detector 1 on the transmitting side serves as an observation point. Three-dimensional detection of seismic waves as seismic information is performed by i', i'', and the seismic waves are converted into electrical signals, amplified by amplifiers 5°s' and s'', and delayed by delay devices 2.2' and 2.2'. transmitted to γ.

Further, one or all components of the signal amplified by the amplifiers 5, 5', 5'' are transmitted to the activation signal generator 17,
When the activation signal generator 17 detects a signal of a certain level or higher, it generates an activation signal as a control signal.

This activation signal activates the time limit device 18 and is transmitted to the automatic dialing device 3 through the time limit device 18, and is transmitted to the sending side telephone 4, the existing telephone line 9, the sending side telephone exchange 10, and the existing telephone number. Via an external telephone line 11, an automatic telephone exchange 12 on the receiving side, and an existing telephone line 13,
After the dialing time has elapsed, the automatic reception telephone 14 is called, and this signal also activates the controller 16 to record the recorder 1.
5.

In this way, when one company's automatic receiving telephones on the transmitting side as an observation point and on the receiving side such as a central information processing center are in a call state, the delay device 2.2', γ delays the communication by a certain period of time. The signals having seismic wave information are sent to a modulator 6, respectively.
．． 6', Ff' and put on the frequency passed through each telephone line, and then mixed by a mixer 7, and then acoustically coupled or directly connected to the transmitting telephone 4 by a coupling device 8.

The signal having seismic wave information transmitted to the transmitting side telephone 4 in this way is transmitted to the existing telephone line 9, the transmitting side telephone exchange 10, the existing long distance telephone line 11, the receiving side automatic telephone exchange 12, The information is transmitted to the recorder 15 via the existing telephone line 13 and the automatic reception telephone 14, and is recorded on a recording paper or the like of the recorder 15.

At this time, the delay time by the delay devices 2.2', 2'' is set as at least the sum of the rise time of the recorder 15, the maximum expected time from the initial motion to the maximum motion of the earthquake, and the dial time. Therefore, the seismic wave information at the observation point can be transmitted to the recorder 15 on the receiving side without loss.

When a certain period of time has passed after the occurrence of an earthquake, the call between the transmitting side telephone 4 and the automatic receiving telephone 14 is cut off by the action of the time limit device 18, and the transmitting side waits for the next earthquake. state is reset.

Note that seismic wave information observed at other observation points is also recorded on the receiving side recorder 15 in the same manner as in the above case.

In addition, on the receiving side of the central information processing center, etc., when the signal from each observation point stops and all calls are disconnected, the controller 1
6, the recorder 15 is stopped and reset to a state in which it waits for the next call from each observation point.

Furthermore, on the receiving side, earthquake detectors 1.
1′, 1″ and delay devices 2.2′, γ may also be provided and connected to the recorder 15.

As detailed above, according to the earthquake observation device of the present invention,
Since a delay device is installed on the transmitting side as an observation point and the existing telephone line is used only for a certain period of time after an earthquake occurs, it is possible to transmit seismic wave information to the receiving side such as the central information processing center without losing it only during an earthquake. , there is an advantage that seismic wave information from a large number of observation points distributed in remote areas can be obtained efficiently and accurately at one location.

In addition, since the earthquake observation device of the present invention uses an existing telephone line, there is no need to install a new dedicated line, which has the advantage of significantly reducing costs.

Furthermore, since the device of the present invention is equipped with a delay device, it is possible to accurately capture the initial vibration of seismic waves, and has the advantage of being able to record seismic waves without being affected by the delay time of automatic dialing. be.

Furthermore, since the delay time of each delay device in the earthquake observation apparatus of the present invention is constant regardless of the observation point, there is an advantage that phenomena at each observation point on the same time axis can be recorded.

[Brief explanation of the drawing]

1 and 2 show an earthquake observation device as an embodiment of the present invention, FIG. 1 is a system diagram of the transmission side as an observation point, and FIG. 2 is a system diagram showing the entire system. 1, 1', 1"...Earthquake detector, 2.2'
, 2"... Delay device, 3... Automatic dialing device %4t4'jl... Transmitting side telephone, 5
．． 5', 5"...Amplifier, 6.6', 6"...
...Modulator, 7...Mixer, 8...
・Coupling device, 9.9', 9''...Telephone line, 1
0,10/. 10″・・・Automatic telephone exchange, 11.11′, 1
1'...Telephone line, 12...Automatic telephone exchange, 13,13'.

Claims (1)

[Claims] 1 At each of the multiple earthquake observation points, an earthquake detector and a transmitting telephone with an automatic dialing device connected to the earthquake detector via a delay device are connected to an automatic telephone exchange. and an automatic receiving telephone connected via a telephone line, and a recorder connected to the automatic receiving telephone, and a starting signal generator connected to the earthquake detector, and a starting signal generator connected to the earthquake detector. It is equipped with a timer that receives a signal from the generator and sends a control signal to the automatic dialing device, and the delay time caused by each of the delay devices is equal to the rise time of the recorder and the maximum expected time from the initial stage of the earthquake to the maximum motion. and an automatic dialing delay time.