JPS61194597A - Security apparatus for underground equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is designed to prevent artificial destruction of second communication cables, optical communication fibers, fluid transport pipes, etc. that are installed through underground facilities such as manholes. This is related to the safety equipment that was used.

[Conventional technology]

In general, this type of security device includes, for example, locking the iron cover of a manhole (-J to prevent it from being easily opened), or making it double-covered and fixing one side with adhesive so that it cannot be easily accessed. There is no other way but to do so.

In addition, most of the methods used in general security systems transmit information as soon as an accident occurs, such as a door switch when the door is opened or a super system activated by the name of an intruder. These include sonic sensors and infrared sensors. Even if such methods were used for underground facilities such as manholes, sabotage could be carried out within a short time after the manhole cover was heard, and by the time it was detected that the manhole had been opened, it was already too late. . The most important thing is
Rather than detecting the outcome, it is the detection of the precursors and phenomena of destructive behavior.

[Problems that the invention attempts to solve]

-31 The present invention is intended to solve the problem of locking underground underground facilities and the problem that destruction cannot be prevented by detecting the result.

[Means for solving problems]

The present invention, as a specific means for solving the above-mentioned problems, installs an opening/closing prevention device in the opening/closing part leading to underground equipment, and also equips the acoustic sensor 9 with various acoustic sensors. A Fourier analyzer that classifies wave components at high speed is connected, a bandpass filter through which the classified 1h constant frequency passes is connected to the Fourier analyzer, and a specific frequency from the bandpass filter is detected and displayed. A control section may be provided, or instead of the bandpass filter, a storage circuit may be provided that stores the results of detecting in advance the sounds generated in the opening/closing section and its surroundings under normal conditions and analyzing their frequency characteristics, and the Fourier analysis. A comparison circuit is installed to compare the specific frequencies that are classified from the instrument with the stored frequency characteristics. The sound generated in the opening/closing part and its surroundings under normal conditions is detected in advance, and the results of analyzing their frequency characteristics are stored in a memory circuit and the Fourier analyzer. The present invention provides a safety device for underground facilities, which is characterized by being equipped with a comparison circuit that compares the frequency characteristics of An abnormal situation can be detected by an act or operation that attempts to illegally listen to information using a jig, and it can be quickly dealt with.

〔Example〕

Next, the present invention will be explained in more detail with reference to several illustrated embodiments. First, in the first embodiment shown in FIG.
Reference numeral 1 denotes an underground facility in which cables 2 for various communications such as telegraph and telephone lines or optical communications, or piping for fluids such as gas or liquids are installed, and there is a manhole 3 that allows access to and from the underground facility. The manhole is provided with an opening/closing part 4 such as a lid. This opening/closing part is a door in the case of a side hole, and this door is also collectively called the opening/closing part.

In the underground equipment configured in this way, the opening/closing part 4
If a locking or opening/closing prevention device 5 is installed, a microphone, etc.
J is done. A Fourier analyzer 8 is connected to this acoustic sensor via a dedicated communication line 7, and the Fourier analyzer analyzes various sounds (distorted waves) input from the acoustic sensor 1 and 6.
into frequencies that calibrate its waveform. This Fourier analyzer 8 is connected via a band pass filter 9 to a control section 10 which also has a memory function, and the specific frequencies classified by the Fourier analyzer 8 are passed through the band pass filter 9 to control the control unit 10. sends signals for display or control to the

In the second embodiment shown in FIG.
is connected and the storage circuit is compared with the frequency analyzed by the Fourier analyzer 8 +r! The circuit 12 is connected so that the signal of the comparison circuit is applied to the controller 1 to the roll section 10. In this case, the memory circuit 11 records in advance various sounds generated near the manhole where the acoustic sensor 6 is installed, that is, various sounds caused by vehicles such as cars and bicycles passing over the manhole, or by passersby. Analyze and store those frequency characteristics, or analyze and store those frequency characteristics by time period, and compare it with the detection blindness detected by the acoustic sensor 'IJ-6 to see if there is an abnormality. It is an attempt to be accurately chiconic.

Further, in the third embodiment shown in FIG. 3, a memory circuit 11 and a comparison circuit 12 are connected in addition to the first embodiment. In this case, a storage circuit 11 is connected to the Fourier analyzer 8, and a comparison circuit 12 is connected to the bandpass filter 9. A comparison is made with a specific frequency extracted from the filter 9, and the result is input to the control section 10.

Furthermore, in the fourth embodiment shown in FIG. 4, a storage circuit 11 and a comparison circuit 12 are connected to a bandpass filter 9 connected to a Fourier analyzer 8. In all three embodiments, the stored data is compared with the specified frequency from the bandpass filter 9, and the result is input to the control unit 10. In these third and fourth embodiments, it is possible to analyze the detected sound from the acoustic sensor 6, which is collected every moment, and the stored data even more accurately.

Furthermore, for example, an optical sensor +J is installed near the opening/closing part 4 and
By equipping with an auxiliary sensor such as -13 or magnetic switch 14, it is possible to achieve even higher accuracy by combining the information from the eight sensor 6. In particular, the magnets 1 to 14 are provided with magnetic locks, so that they can be opened and closed using the door section 1, so that they cannot be opened or closed illegally. If you need to open or close the door, for example, when doing construction work, you can declare this in advance and unlock the door in advance so that you can legally open and close the door. Moreover, the opening/closing part 4 works even more effectively if it has a double lid structure instead of a single lid structure.

[For production]

The security device of the present invention having the above-mentioned configuration prevents the squeaking sound ( A characteristic sound such as a distorted wave is detected by an acoustic sensor 6, and the detected sound is immediately analyzed by a feedback analyzer 8 and controlled via a bandpass filter 9 or a storage circuit 11 and a comparison circuit 12. part 10,
The abnormal state is notified in the control section. Since this notification of an abnormal condition clearly indicates the position or place where the abnormality has occurred, it is sufficient to immediately go to that position or location and confirm the abnormal condition.

At this time, if the opening/closing part 4 has a double structure, it will take more time to open it, and by first detecting the abnormal condition and dispatching, the second opening/closing part cannot be opened. , or even if it was opened, the dispatch team could arrive while the person who illegally opened it was still on the scene.

Furthermore, even if an attempt is made to open the lock illegally using a duplicate key that can be heard by the locking or opening/closing prevention device 5, a unique metallic sound is generated by the duplicate key, which is detected by the acoustic sensor 6. Detects unusual sounds. Even if the opening/closing prevention device a is removed by pressing J: on the duplicate key, it cannot be opened easily because the magnetic lock 14 is still active, and it is still necessary to pry it open using a jig such as a crowbar. It takes time to open.

In short, in the present invention, since an abnormal condition can be detected at the first act of illegally opening the opening/closing part 4, there is time to respond immediately and take measures before it is destroyed, unlike the conventional method. The warnings have been issued since the underground facilities were destroyed.

〔Effect of the invention〕

The safety device for underground equipment according to the present invention described below is equipped with a locking or opening/closing prevention device in the opening/closing part leading to the underground equipment, and is equipped with an acoustic sensor. By connecting a Fourier analyzer to a bandpass filter and a control unit, it is possible to analyze the acoustic wave components from the acoustic tunnel and detect whether an abnormal situation has occurred in which the opening/closing section is illegally opened. This has the excellent effect of being able to deal with abnormal situations before equipment is unduly destroyed.

Further, more accurate information can be obtained by appropriately connecting a memory circuit and a comparison n-way to the Fourier analyzer and bandpass filter, and configuring the system so that the signal from the comparison circuit is input to the control section. It also has this excellent effect.

In addition, by making the opening/closing part double-layered and equipped with a magnetic lock device that can be controlled by an auxiliary sensor and controller 1~roll, even if you try to open the opening/closing part illegally using a duplicate key, you will be prevented from doing so. It also has the excellent effect of being able to detect an abnormal situation and quickly deal with it.

[Brief explanation of drawings]

FIG. 1 is a block diagram schematically showing a first embodiment of a safety device for underground facilities according to the present invention, FIG. 2 is a block diagram showing only the main parts of the second embodiment, and FIG. FIG. 4 is a block diagram showing only the main parts of the fourth embodiment. 1... Underground equipment 2... Communication cable 3... Manhole 4... Opening/closing part 5... Locking or opening/closing prevention device 6... Acoustic sensor -- 7... Communication line 8...・Fourier analyzer 9...Band pass filter 10...Control section 11...Storage circuit 12...Comparison circuit

Claims (5)

[Claims] (1) An opening/closing prevention device is provided in the opening/closing section leading to underground equipment, and an acoustic sensor is installed, and a Fourier analyzer that classifies various acoustic wave components at high speed is connected to the acoustic sensor. 1. A security device for underground facilities, characterized in that a control unit is connected to a band-pass filter through which a specific frequency passes through, and a control unit detects and displays a specific frequency from the band-pass filter. (2) Install an opening/closing prevention device in the opening/closing section leading to underground equipment and equip it with an acoustic sensor, connect the acoustic sensor with a Fourier analyzer that classifies various acoustic wave components at high speed, and connect the Fourier analyzer with a normal A storage circuit that stores the results of detecting sounds generated in the opening/closing part and its surroundings in advance and analyzing their frequency characteristics, and a specific frequency that is classified moment by moment from the Fourier analyzer and the stored frequency. 1. A safety device for underground facilities, characterized in that a control section is connected to a comparison circuit for comparing characteristics and displays a display based on a signal from the comparison circuit. (3) Install an opening/closing prevention device in the opening/closing section leading to the underground equipment and equip it with an acoustic sensor, connect the acoustic sensor to a Fourier analyzer that classifies various acoustic wave components at high speed, and A bandpass filter through which a specific frequency passes is connected to the Fourier analyzer, and the sound generated in the opening/closing part and its surroundings under normal conditions is detected in advance and the results of analyzing the frequency characteristics are stored. A comparison circuit is connected to the circuit, and a comparison circuit is provided to compare a specific frequency from the bandpass filter with a frequency stored in the storage circuit, and a control unit is provided to display a display based on a signal from the comparison circuit. Safety equipment for underground facilities. (4) Install an opening/closing prevention device in the opening/closing section leading to the underground equipment and equip it with an acoustic sensor, connect the acoustic sensor to a Fourier analyzer that classifies various acoustic wave components at high speed, and A band-pass filter through which a specific frequency passes is connected to the band-pass filter, and the band-pass filter stores the results of detecting in advance the sounds generated in the opening/closing part and its surroundings under normal conditions and analyzing their frequency characteristics. and a comparison circuit that compares a specific frequency from the bandpass filter with a frequency stored in the storage circuit, and a control unit that displays based on the signal from the comparison circuit. Safety equipment for underground facilities. (5) The safety device for underground equipment as described in items 1 to 4 above, characterized in that the opening/closing part leading to the underground equipment has a double structure.