JPH0217307Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a seismometer used for observing earthquakes.

(Prior art) A seismometer is a method in which a transducer installed at an observation point converts ground vibration detected by the principle of a pendulum into an electrical signal using a piezoelectric method, transmits it, and outputs it to a recording device. is common. In this case, good observation results cannot be obtained unless the observation point is selected at a location with little vibration (that is, noise) caused by traffic and various industrial activities. Therefore, noise countermeasures such as installing it in a place isolated from the traffic of people and vehicles or burying it underground are taken, and as a result, the exchanger is inevitably installed in an isolated place, and earthquake recording equipment Chisels are often installed in places where people can see them.

Regarding ground vibrations that do not reach a certain level,
A method is adopted in which the printer device is not driven, thereby saving recording paper and also reducing wear and tear on the printer device itself.

(Problems to be solved by the invention) However, these earthquake recording devices had the following drawbacks. This is because we are dealing with a subject that cannot be re-observed, such as an earthquake, so it is essential to check whether there are any abnormalities in the system status under normal conditions. Because they are often installed in isolated locations, it is extremely difficult to confirm in advance whether they are functioning properly in an emergency, and there is no way to check them on a daily basis. In addition, when observing ground vibrations, sources of vibration other than earthquakes are detected in the vicinity of the observation point, such as tremors caused by transportation, factories, and civil engineering works, and periodic vibrations caused by ocean waves. Observing the degree of pulsation is also useful in analyzing the cause of vibrations or, for example, in knowing how strong the ground is in the vicinity. If the information was printed all the time, the waste of recording paper would be enormous, making the device impractical.

In view of the above points, this idea makes it possible to fully understand the condition of an isolated vibrator, and also makes it possible to observe ground vibrations such as microtremors and pulsations, which occur most frequently in daily life, as necessary. The purpose is to

(Means for solving the problem) In order to solve the above problem, this idea classifies ground vibrations below a predetermined intensity into multiple levels according to their intensity in an earthquake measurement and recording system. An independent light emitting element is made to correspond to each stage, and each light emitting element is made to emit light as appropriate based on an electrical signal from an exchanger that detects ground vibration, and each light emitting element is connected to the earthquake recording device. It is characterized by being placed on the operation panel or display panel of.

(Function) In the normal operation display device for a vibrator according to this invention, when ground vibration that does not reach the set intensity is detected, the printer is not driven, and the light emitting element corresponding to the class is classified into multiple stages. Performs a light-emitting display.
Further, when ground vibration reaching or exceeding a set intensity is detected, the printer is driven to perform predetermined recording on recording paper.

(Example) Hereinafter, the normal operation display device for a vibrator of the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a diagram showing a seismometer system including the device of the present invention, and numeral 1 is a transducer installed on the ground, and the structure thereof is, for example, a piezoelectric type. Reference numeral 2 denotes an earthquake recording device connected to the transducer 1, and this includes the following parts. 3 is a printer that records vibration waveforms on recording paper 4 when the ground vibration exceeds a predetermined level;
Normally, when the vibration exceeds 0.8 gal, the waveform is automatically recorded. 5 is a control circuit for controlling the normal operation display device of the printer 3 and the vibrator of the present invention described below; 6 is a normal operation display device of the vibrator connected to the control circuit 5; Device 6
is composed of a normal operation display circuit 7 and a display device 8. A circuit diagram of an example of the normal operation display circuit 7 is shown in FIG. The display device 8 is made up of, for example, seven light emitting elements 9, and in one example, light emitting diodes (LEDs) are used.Such a display device 8 or a group of light emitting devices 9 is used in the seismic recording device 2 as shown in FIG. This is a display device installed on the operation or display panel 14 of the device, and this device 6 is composed of a normal operation display circuit 7 and a display unit 8. A circuit diagram of an example of the normal operation display circuit 7 is shown in FIG. The display device 8 is made up of, for example, seven light emitting elements 9. In one example, a light emitting diode (LED) or a group of nine light emitting elements is used, and in FIG.
is the input terminal of converter 1, 11 is the power input terminal, 1
2 is a ground line, and 13 is a constant current source.

Next, the operation of the device of the present invention will be explained. As mentioned above, if the ground vibration of 0.8 gal or less is not recorded on the recording paper 4, for example, if there is a vibration of 0.7 gal, the printer 3 will not operate, but the seven light emitting elements 9
All of them will be lit. At a vibration of 0.4 gal, for example, all the four light emitting elements 9 from the left of the display 8 in FIG. 1 light up, and the other light emitting elements do not light up. At vibrations of about 0.1 gal, only the leftmost light-emitting element lights up.

(Effects of the invention) The present invention has the above-mentioned configuration and operation, and therefore brings about the following effects. Among the ground vibrations detected by the transducer, the observation results are not output to a printer, but rather the light-emitting elements emit light according to the intensity of the microtremors, which is the most likely to occur on a daily basis. It is possible to regularly check the operating status of the transducers installed at a location, such as whether there is a failure in the transducer or whether there is a disconnection in the output path from the transducer to the earthquake recording device. , it becomes possible to reliably conduct observations in the event of an emergency, that is, when an earthquake of a magnitude larger than that actually occurs occurs.

In addition, since it is equipped with a light emitting element that displays weak vibrations, it is possible to investigate the presence or absence of minute vibrations and pulsations, their causes, and also to know the situation of the ground nearby. As a result, even in the event of an emergency, it is possible to understand vibrations as noise and analyze the scale and directional components of earthquakes that actually occur. In addition, since printer output is not required for vibrations that only need to be known as needed, it is possible to prevent wasteful consumption of paper by displaying only the light-emitting element, thereby making the device highly practical. can.
In this way, the present invention has extremely significant industrial effects in terms of its usability.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a seismograph system including the device of the present invention, FIG. 2 is a perspective view thereof, and FIG. 3 is a circuit diagram of an example of a normal operation display device for a vibrator of the present invention. 1... Vibrator, 2... Earthquake recording device, 3... Printer, 6... Vibrator normal operation display device, 7...
...Direct operation display circuit, 8...Display device, 9...
...Light emitting element.

Claims (1)

[Scope of utility model registration request] A transducer that converts ground vibration into an electrical signal and outputs it, and when the ground vibration exceeds a predetermined level, the printer starts to drive and records the vibration waveform of that earthquake, and if the ground vibration is less than a predetermined intensity, the printer starts driving. In an earthquake measurement and recording system consisting of an earthquake recording device whose drive stops and no recording is made, ground vibrations below the predetermined intensity are classified into multiple stages according to their intensity, and each stage is independently classified. and each of the light emitting elements emits light based on the electrical output of the vibrator that detects ground vibration, and each of the light emitting elements is arranged horizontally, vertically, or inclined, and each of the light emitting elements A normal operation display device for an exciter, characterized in that a light emitting element group is installed on an operation or display panel of the seismic recording device.