JP2001108517A - Earthquake detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such problems that a testing circuit for applying adequate testing voltage is necessary even in a capacity type sensor, and a testing device should be carried to the installing place of the capacity type sensor in order to conduct a periodical check at the installed site of a chemical plant or the like. SOLUTION: A mechanical earthquake sensor 61 is fixed to a circuit board 76 through a supporting member, and when a vibration detecting test of the earthquake sensor 61 is conducted, the finger is put into from a notch 77 formed on the lower surface of a front panel 71, and furthermore put into a hole (a vibration imparting means) 61b installed on the bottom of the earthquake sensor 61 to give vibration to a vibration piece 61a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention does not require a special vibration detection test device for a mechanical seismic sensor, and can easily and efficiently perform a vibration detection test of a mechanical seismic sensor at an installation location. The present invention relates to a detection device.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a cross-sectional view showing a conventional acceleration detection device having a test function disclosed in Japanese Patent Application Laid-Open Publication No. H10-15095. Such an acceleration detecting device can be used as an earthquake sensor. The fixed electrodes 2 and 3 provided on the fixed substrate 1 and the displacement electrodes (upper surface of the flexible substrate 4) opposed thereto can form four sets of capacitive elements. Thus, the acceleration applied to the operating body 5 can be detected. Further, four sets of capacitive elements are formed by the auxiliary electrodes 6 and 7 and the displacement electrodes (the lower surface of the flexible substrate 4), and the acceleration is detected.

[0003] The feature of this device is that it is possible to create a state equivalent to the application of acceleration without actually applying the acceleration. The flexible substrate 4 and the electrode 3 have different polarities. When a voltage is applied, an attractive force based on Coulomb force acts between the two, and when voltages of different polarities are applied to the flexible substrate 4 and the electrode 6, an attractive force based on the Coulomb force acts between the two. When such an attractive force acts, the flexible substrate 4 bends in the same manner as when the force is applied, even if no force is actually acting on the action body 5.

[0004]

Since the conventional earthquake sensor is constituted by using the above-described acceleration detecting device, it can be applied only to the capacitive sensor. For example, it is a capacitive sensor. However, a test circuit for applying the appropriate test voltage is required, and if periodic inspections are performed at the installation site such as a chemical plant, the test equipment must be transported to the installation site of the capacitive sensor There were issues such as.

[0005] In addition, since it is not always possible to secure the power supply of the test circuit at the installation site, there is a problem that it is necessary to carry a storage battery, a portable generator, and the like. Once the body is installed at the site, the housing must be removed and attached for each periodic inspection, and there are problems such as complicated work and poor work efficiency.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and does not require a special operation test device for a mechanical vibration sensor, and can easily perform an operation test of a mechanical earthquake sensor at an installation place. It is an object of the present invention to obtain an earthquake detection device that can be efficiently performed.

[0007]

According to a first aspect of the present invention, there is provided an earthquake detecting apparatus in which a vibration applying unit of an earthquake sensor mounted on a control unit manually applies vibration.

According to a second aspect of the present invention, there is provided an earthquake detecting apparatus in which an opening is provided in a housing so that the vibration applying means can be touched.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. First, a schematic configuration of a gas supply system using the present invention will be described. FIG. 1 is a configuration diagram showing a gas supply system using an earthquake detection device. In FIG. 1, reference numeral 11 denotes a gas production plant having an explosion-proof area, 12 denotes a gas tank, 13 denotes a high-pressure pipe, 14 denotes a governor, 15 denotes a governor station having an explosion-proof area, 16 denotes a medium-pressure pipe, 17 denotes a governor, and 17a denotes a governor station. Emergency shutoff valve, 18 is a monitoring room, 19 and 20 are emergency shutoff instructions, 21 is a governor room as an explosion-proof area, 22
Is a governor having an emergency shutoff function.

Reference numeral 30 denotes an explosion-proof case for protecting the semiconductor acceleration sensor 31, reference numeral 31 denotes a semiconductor acceleration sensor capable of measuring three axes (X, Y, Z axes) described later, and reference numeral 32 denotes a signal input from the semiconductor acceleration sensor 31, An arithmetic processing circuit for performing arithmetic processing, 57 is a digital signal (binary signal) output from the arithmetic processing circuit 32, and 60 is a control mounted in a control panel (not shown) on the outer wall surface (non-explosion-proof area) of the governor room. Unit. The control panel is a storage box for an electric device such as the control unit 60 and a power supply. 61 is a control unit 60
A mechanical seismic sensor that is installed in the inside and uses a vibrator 61a. A hole (vibration applying means) is provided on the bottom surface of the mechanical seismic sensor 61 so that the vibrator 61a can be manually touched. 61b is provided (see FIG. 4).

Numeral 62 determines each state (earthquake detection, liquefaction detection, heavy failure detection, light failure detection, automatic or forced shutdown, etc.) based on output signals from the semiconductor acceleration sensor 31 and the mechanical earthquake sensor 61. , Digital signal 5
7 is a judgment circuit for generating a cutoff signal 63 for shutting off the governor 22 when both the seismic detection signal from the mechanical seismic sensor 61 is output, 64 is a low pressure conduit, 65 is a gas-supplied home, 66 is Is a factory supplied with gas.

Next, the appearance of the control unit will be described. 2 is a front view showing a control unit of the earthquake detection device, FIG. 3 is a sectional view taken along line AA of FIG. 2, and FIG. 4 is a bottom view of FIG. 2 to 4, reference numeral 71 denotes a front panel (housing) of the control unit, and reference numerals 72a and 72b denote remote SW1 and remote SW2 that generate a shutoff signal 63 when pressed simultaneously to confirm the operation of the shutoff valve. is there.
It should be noted that the remote SW1 and the remote SW2 may be constituted by simple push-button switches, and the attendant may press the remote SW1 and the remote SW2 at predetermined time intervals. This can prevent a malfunction when the remote SW1 and the remote SW2 are pressed by mistake at the same time. Reference numeral 73 denotes a diagnostic switch used for self-diagnosis of the circuits of the semiconductor acceleration sensor 31 and the mechanical earthquake sensor 61.

Reference numeral 74 denotes a reset switch for canceling the set state in the judgment circuit 62, 75 denotes an LED panel for displaying the operation state in the judgment circuit 62, and 76 denotes a circuit board attached to the back of the front panel 71. Circuit board 76
Is attached with a mechanical earthquake sensor 61 via a support member. 77 is a vibrator 61a of the mechanical earthquake sensor 61
Is a notch (opening) formed in the lower surface of the front panel 71 to apply vibration with a finger, and a part of the LED panel 74 is bent so as not to touch other circuit components of the circuit board 76. Guarded. Further, even when another device is arranged below the control unit, a finger can be inserted through the notch 77 to touch the vibrator 61a of the internal mechanical earthquake sensor. The notch 77 may be provided with a lid that can be opened and closed.

The mechanical earthquake sensor 61 outputs a seismic signal by touching the vibrator 61a through a hole 61b formed on the bottom surface. Therefore, in order to diagnose the failure of the mechanical earthquake sensor 61, a configuration that enables the control unit 60 to operate the mechanical earthquake sensor 61 is required. When the mechanical seismic sensor 61 is arranged on the LED panel 75 and the remote SW1 and the remote SW2 side of the circuit board 76, the operation is easy, but the mechanical seismic sensor 61 is much higher than the LED or the switch, and is crashed due to the configuration. It has problems such as being easy and the casing structure becoming complicated.

Therefore, as a result of installing the mechanical earthquake sensor 61 on the back side of the circuit board 76, the height of the LED panel 75 and the remote SW1 and the remote SW2 are almost the same. It is easy to operate on a flat surface and has no protrusions such as bumps, making it easier. There is no need to limit the space on the back side of the circuit board 76, and rather large components such as relays and capacitors are arranged. At the same time, the housing structure is configured to cover the mechanical seismic sensor 61 in a planar manner. It was a simple structure. Also, by assembling the mechanical earthquake sensor 61 to the control unit 60 and arranging the control unit 60 in the control panel, the number of assembling steps can be significantly reduced, and the notch 77 formed on the lower surface of the front panel 71. , It is possible to easily operate the vibrator 61a and perform a failure diagnosis operation.

In the conventional screw terminal wiring, the wiring becomes very complicated and the length of the wiring cable becomes long. Therefore, in the present invention, a connector is arranged on the back surface of the circuit board 76 in order to solve such a problem. Also, the connectors were arranged with different numbers of pins (there are no connectors with the same number of pins) to prevent erroneous wiring.
The wiring cable has a terminal for a screw terminal on one side and a connector terminal on one side (control unit 60). After connecting the screw terminal to a terminal in the control panel, the connector is connected to the control unit 60. Wiring can now be done easily by inserting it into the connector. Also,
The cables have been shortened, the wiring inside the control panel has been reduced, and incorrect wiring has been eliminated. As described above, there is no miswiring, the structure is simple, and the control unit 60 is small.

Next, the vibration adding means provided in the mechanical earthquake sensor will be described. FIG.
It is sectional drawing which shows the mechanical seismic sensor which deformed so that it might be provided with the vibration addition means in the seismic sensor disclosed by the 1st publication. In FIG. 5, reference numeral 81 denotes a cylindrical case made of synthetic resin, 82 denotes a spherical receiving surface having a conical inner surface of the bottom wall of the cylindrical case 81, and the spherical receiving surface 82 has a hole 82a (vibration adding means). Are formed, and the rigid sphere 83 provided in the cylindrical case 81 can be moved by a finger. 83 is supported on a conical spherical receiving surface 82 so as to be able to roll in all directions of 360 degrees, and is always held substantially at the center. Reference numeral 84 denotes a plunger which is cap-fitted so as to be able to abut on the spherical surface of the hard sphere 83 at a predetermined interval.

Reference numeral 85 denotes an actuator mounted on the upper portion of the plunger 84 and supporting the plunger 84 on a movable terminal 86 provided on the inner surface of the cylindrical case 81. It is supported to move right and left at the same time. A pressing projection 85a is provided on the upper part of the actuator 85.
Reference numeral 86 denotes a movable terminal which is pushed upward by a pressing projection 85a of the actuator 85 when the actuator 85 is moved right and left in the drawing. Reference numeral 87 is provided on the upper surface of the cylindrical case 81 and is turned on / off by the movable terminal 86. When the switch 87 is turned on, a detection signal is output to the determination circuit 62.

FIG. 6 is a sectional view showing a modification of FIG.
6, the same reference numerals as those in FIG. 5 denote the same or corresponding parts, and a description thereof will not be repeated. Reference numeral 91 denotes a push rod (vibration applying means) provided on the sphere receiving surface 82 via a coil spring 92, and moves the hard sphere 83 provided in the cylindrical case 81 to the left in the drawing by pushing up the push rod 91. Can be. The wavy lines indicate the position of the push bar 91 and the position of the hard sphere 83 when the push bar 91 is pushed up.

FIG. 7 is a perspective view showing a mechanical seismic sensor modified by adding vibration applying means in the vibration pickup disclosed in Japanese Utility Model Publication No. 3-25150. FIG.
In the figure, 101 is a rectangular plate-shaped base, 102 is a prism-shaped mounting base, 103 is a rectangular lever, and 104 is a cylindrical piezoelectric element having a thickness shear mode polarized in the circumferential direction. 102 are arranged so as to be sandwiched and electrically connected in parallel with each other.
02 is fixedly mounted. Reference numeral 106 denotes a column-shaped weight, both sides of which are held by levers 103 and 103 and fixed by mounting bolts 108.

Reference numeral 109 denotes a box-shaped case which is open on one side, and
01 is fixed. Reference numeral 110 denotes a rectangular stopper for preventing damage, which is mounted and fixed on the upper surface of the base 101. Reference numeral 111 denotes a manual lever (vibration applying means) extending in the longitudinal direction of the lever 103. The manual lever 111 is manually moved in the direction of the arrow in the drawing to thereby
4 can be tested. The case 109 is partially cut away so as not to interfere with the manual lever 111.

FIG. 8 is a side view showing another mechanical earthquake sensor modified by adding a vibration applying means in the vibration pickup disclosed in Japanese Utility Model Publication No. 3-25150. Reference numeral 121 denotes a mechanical earthquake sensor shown in FIG. 7, and reference numeral 122 denotes a mounting base (vibration applying means) attached to the lower surface of the mechanical earthquake sensor 121, and a manual lever (vibration applying means) is provided in the longitudinal direction of the mounting base 122. 123 is extended. The mounting base 122 is provided with a bearing (vibration applying means) 1
It is rotatably provided on the circuit board 125 via 24. Reference numeral 126 denotes a coil spring (vibration applying means) that connects the circuit board 125 to an end of the mounting base 122 opposite to the end on which the bearing 124 is mounted. When the manual lever 123 is released after the coil spring 126 is compressed by grasping the manual lever 123, the mounting base 122 vibrates about the bearing 124. In addition, when the vibration detection test is not performed,
The mounting base 122 is fixed to the circuit board 125 by fixing means (not shown).

Next, the operation will be described. The control unit of the earthquake detection device shown in FIGS.
6, a mechanical earthquake sensor 61 is attached via a support member. When a vibration detection test of the mechanical earthquake sensor 61 is performed, a finger is inserted through a notch 77 formed on the lower surface of the front panel 71, and A finger is inserted into a hole (vibration applying means) 61b provided on the bottom surface of the mechanical earthquake sensor 61 to apply vibration to the vibrator 61a.

In the mechanical earthquake sensor shown in FIG. 5, a hole 8 is formed in the conical spherical receiving surface 82 of the bottom wall of the cylindrical case 81.
2a (vibration adding means) are formed, and when the vibration detection test of the mechanical earthquake sensor 61 is performed, the holes 82a
By moving a rigid ball 83 provided in the cylindrical case 81 with a finger, a switch 87 provided on the upper surface of the cylindrical case 81 is turned on.

Further, a push rod (vibration applying means) 91 is provided on the bottom wall of the cylindrical case 81 via a coil spring 92 in the mechanical earthquake sensor shown in FIG. By moving the hard sphere 83 provided in the cylindrical case 81 to the left in the drawing, the cylindrical case 81 is moved.
Switch 87 provided on the upper surface of is turned ON.

Further, the mechanical earthquake sensor shown in FIG. 7 is provided with a manual lever (vibration applying means) 111 extending in the longitudinal direction of the lever 103.
Is manually moved, a torsional force is applied in the circumferential direction of the piezoelectric element 104 attached to the lever 103, and a voltage is generated on both end faces. For a specific method for extracting an electric signal, refer to the official gazette.

Further, the mechanical earthquake sensor shown in FIG. 8 has a mount 1 attached to the lower surface of the mechanical earthquake sensor 121.
22 (vibration applying means), and a manual lever (vibration applying means) 123 is extended in the longitudinal direction of the mounting base 122.
The mounting base 122 is rotatably provided on the circuit board 125 via a bearing (vibration applying means) 124, and is connected to an end of the mounting base 122 opposite to the end on which the bearing 124 is mounted. A coil spring (vibration applying means) 126 provided between the mechanical earthquake sensor 121 and the coil spring 126 causes the mechanical earthquake sensor 121 to rotate around the bearing 124 by swinging the manual lever 123 manually against the coil spring 126. And the piezoelectric element 1 attached to the lever 103
A torsional force is applied in the circumferential direction of No. 04 to generate a voltage on both end faces. For the principle of generating electricity, refer to the official gazette.

As described above, according to the first embodiment, the mechanical seismic sensor 61 assembled to the control unit 60 is provided with the vibration applying means for manually applying the vibration. This does not require a special operation test device, and the effect that the operation test of the mechanical earthquake sensor 61 can be easily and efficiently performed at the installation location can be obtained.

[0029]

As described above, according to the first aspect of the present invention, the vibration applying means of the seismic sensor assembled to the control unit is configured to manually apply vibration. There is an effect that the operation test of the earthquake sensor can be easily and efficiently performed at the installation place without the need for the operation test device of the above.

According to the second aspect of the present invention, since the housing is provided with the opening so that the vibration applying means can be touched, the vibration can be manually applied even if other electric devices are arranged vertically. Therefore, there is an effect that the operation test of the earthquake sensor can be easily and efficiently performed at the installation location.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a gas supply system using an earthquake detection device.

FIG. 2 is a front view showing a control unit of the earthquake detection device.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a bottom view of FIG. 2;

FIG. 5 is a cross-sectional view illustrating a mechanical earthquake sensor provided with a vibration adding unit in the earthquake detection device.

FIG. 6 is a sectional view showing a modification of FIG.

FIG. 7 is a perspective view showing a mechanical earthquake sensor provided with vibration adding means in the earthquake detection device.

FIG. 8 is a side view showing a mechanical earthquake sensor provided with vibration adding means in the earthquake detection device.

FIG. 9 is a cross-sectional view showing a conventional earthquake detection device having a test function.

[Explanation of symbols]

 61 Mechanical earthquake sensor 61a Vibrator 61b Hole (vibration applying means) 62 Judgment circuit (judging means) 71 Front panel (housing) 77 Notch (opening) 82a Hole (vibration applying means) 91 Push rod (vibration applying means) ) 111 Manual lever (vibration applying means) 122 Mounting base (vibration applying means) 123 Manual lever (vibration applying means) 124 Bearing (vibration applying means) 126 Coil spring (vibration applying means)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shunji Ichida 2-12-19 Shibuya, Shibuya-ku, Tokyo Stock Company Takeuchi Shayama (72) Inventor Takayuki Akimoto 2-12-19 Shibuya, Shibuya-ku, Tokyo Stock Company Takeuchi Yamamoto (72) Inventor Yoshihisa Shimizu 2-26-3 Kahinata, Satte-shi, Saitama (72) Inventor Kenichi Koganaru 1-48-908 Higashiikebukuro, Toshima-ku, Tokyo F-term (reference) 2G064 AB19 AB22 BB11 BB45 BB61 BB64 DD29 DD32

Claims (2)

[Claims] 1. An earthquake sensor for converting the vibration of a vibrator into an electric signal and outputting the electric signal; a control unit including a judging means for inputting an electric signal from the seismic sensor and outputting a judgment signal of occurrence of an earthquake; An earthquake detection device comprising: a housing for storing a control unit in which a sensor is assembled; and a vibration applying means for manually applying vibration to the earthquake sensor. 2. The vibration applying means can be touched through an opening provided in the housing.
The described earthquake detection device.