JPH06347562A - Detector - Google Patents

Abstract

PURPOSE:To improve mountability and to facilitate handling an management by mounting many resonators for constituting a resonance circuit, which resonates with a radio wave a having a specific frequency, at each predetermined interval at a long tapelike member as sensor. CONSTITUTION:A resonance label 3 uses a material in which metal foils 5, 6 are, for example, adhered to both surfaces of a polyolefinic resin film 4 as a board. The foil 5 is used as an LCR circuit and a circuit terminal, and the foil 6 is used as a capacitor electrode plate and a circuit terminal. A 'resonant circuit' is printed on the foils 5, 6 by using ink having etching resistance, and then chemically etched to form a resonance circuit. Many labels 3 are disposed at an equal interval on a tapelike film 2 having an environmental resistance, mounted being laminated by the film 2, thereby manufacturing a sensor 1. The film 2 is wound in a rolled state, and used by cutting length to be used. The sensor 1 can be adhered directly to an embedded material such as synthetic resin, etc., and arranged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensor for detecting an object such as a water pipe, a gas pipe, a buried object such as a cable for transmitting information, and in particular, it utilizes a resonance frequency circuit which resonates with a radio wave of a specific frequency. The present invention relates to an object detection sensor for detecting an object by using a sensor.

[0002]

2. Description of the Related Art Conventionally, a tape-shaped vinyl sheet having identification characters and codes is used as a measure for identifying the type of water pipes, gas pipes, cables for transmitting information, etc. buried underground and other information. There is a method of pasting it on the surface of a water pipe or the like in advance and visually observing the identification characters or codes written on the tape-shaped vinyl sheet to identify the type of the water pipe or the like and other information.

There is also a method in which a stud type mark having identification characters or codes is driven into the ground where a water pipe or the like is buried, and the mark is visually checked. However, in the former identification method, it is necessary to delve into the ground and identify the tape-shaped vinyl sheet attached to the water pipe or the like when identifying.

Further, in the latter identification method, it is not necessary to dig back the ground for identification, but it is necessary to carry out a troublesome work of individually driving a tack type mark at a large number of points on the ground.

On the other hand, as a method for solving the problems of the above-mentioned method, an object is electrically detected and the type of a water pipe, a gas pipe, an information transmission cable, etc. buried underground and other information etc. are detected. Identification strategies are known, which use object detection sensors.

For example, as a conventional object detection sensor,
A marker that is installed near the buried object in the ground and detects the existence of the buried object by utilizing the resonance sensitivity of the passively tuned antenna to electromagnetic waves of a specific frequency given from the ground is known. (See Japanese Patent Laid-Open No. 63-81277).

Further, conventionally, there is known a device for detecting the position of the buried object by detecting an electromagnetic wave from an electric wire buried along the buried object (see Japanese Patent Laid-Open No. 123187/1989).

Further, as an object detecting device such as a position detecting device for a buried object, an accident point detecting device for an underground cable, etc., JP-A-2-193801 and JP-A-2-281179.
JP-A-4-36688 and JP-A-4-21
3088 and Japanese Patent Laid-Open No. 5-11046.

[0009]

However, the sensor in the above-mentioned conventional object detecting device has the following problems. That is, in the above-mentioned object detection marker, it is necessary to individually provide a marker at each of a large number of embedded objects in the ground, and a marker arranging work that is cumbersome for construction when burying an embedded object in the ground is required. Will be needed. Particularly, in the case of an embedded object such as a water pipe, a gas pipe, and a cable for transmitting information having a predetermined length, the work of mounting the marker at predetermined intervals requires a great deal of labor and time.

Further, since it is necessary to prepare a large number of markers, it is troublesome to handle and manage them. further,
Even in the above other object detection devices, the detection sensor has the same problems as the above-mentioned marker in terms of wearability, handleability, manageability, and the like.

In view of the conventional problems as described above, the present invention adopts a tape form as an object detection sensor for detecting an object by utilizing a resonance frequency circuit that resonates with a radio wave of a specific frequency, and improves the mountability. It aims to facilitate handling and manageability as well as

[0012]

Therefore, in the object detecting sensor of the present invention, a resonance frequency circuit that resonates with a radio wave of a specific frequency transmitted from a detection device is provided on a long tape-shaped member having a predetermined length. A large number of resonance devices constituting the above are mounted at predetermined intervals.

[0013]

In such a structure, when detecting buried objects such as water pipes, gas pipes and information transmission cables buried in the ground, when these buried objects are made of metal, the An object detection sensor is provided along a buried object or at a position at a predetermined distance downward from the ground, or is arranged near the buried object.

As described above, in order to identify the type and other information of the buried object in which the object detecting sensor is set, for example, the detection device is moved along the ground where the buried object is buried. This makes it possible to determine the type and other information of the buried object according to the resonance frequency, and to confirm the type and other information of these buried objects.

As described above, according to the object detecting sensor of this structure, the resonators can be collectively arranged at a large number of places of the buried object, and the sensors are individually provided at a large number of the buried objects. Since it is not necessary, complicated sensor installation work is not required for the work when burying the buried object in the ground. In particular, for embedded objects such as water pipes, gas pipes, and cables for information transmission that are continuous to a specified length, the sensor can be set extremely easily, does not require a great deal of labor and time, and greatly improves workability. Improve to.

Further, since the long tape-shaped member is simply handled and managed, it is easy to handle and manage.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. In FIG. 1, an object detection sensor 1 includes a tape-shaped film 2 as a long tape-shaped member having a predetermined length and a resonance frequency circuit that resonates with a radio wave of a specific frequency transmitted from a detection device described later. It is configured by laminating and mounting a large number of resonance labels 3 as a resonance device at predetermined intervals.

Here, the structure of the resonance label 3 is shown in FIGS.
4 will be described. That is, the resonance label 3 uses, as a dielectric, a polyolefin resin film such as polyethylene or another synthetic resin film 4 having a thickness of 0.03 mm or less in which the electromagnetic value "dielectric loss tangent" is as small as possible. A material in which metal foils 5 and 6 such as aluminum foil are extruded or bonded by thermocompression bonding on both surfaces of the film (dielectric material) 4 is manufactured as a substrate material.

Among the metal foils used, particularly in the case of aluminum foil, the purity of aluminum is 99.0% or more 99 because of its electrical properties, processing suitability such as laminating or etching work, and physical properties of products. 0.7% or less is desirable.

Of the metal foils 5 and 6 attached to both sides of the resin film 4 as the dielectric, the metal foil 5 on one side is used as an LCR circuit and circuit terminal portion as shown in FIG. If the foil 5 is aluminum foil,
A foil having a thickness of 0.040 mm or more and 0.060 mm or less is desirable. The metal foil 6 on the side opposite to the metal foil 5 is used as a capacitor electrode plate and a circuit terminal portion.

In order to obtain a specific resonance frequency, various printing methods such as gravure printing, silk screen printing, flexo printing, letterpress printing, etc., on both sides of the above-mentioned substrate material, that is, on the metal foils 5 and 6. A "resonance frequency circuit" is printed using an etching resistant ink, and then chemically etched using a chemical solution such as acid or alkali to form a resonance frequency circuit.

The tape-shaped film 2 is an environment-resistant (heat-resistant and water-resistant, etc.) film material having a certain degree of elasticity and strength enough not to be damaged by foreign matter such as stones when the ground changes. Is adopted. Examples of the film material include a polyimide film and polyetherimide.

Then, a large number of resonance labels 3 are arranged on the tape-shaped film 2 at predetermined intervals, and the resonance labels 3 are laminated by the films 2 and mounted, whereby the object detecting sensor 1 is manufactured. . The tape-shaped film 2 is wound in a roll shape as shown in FIG. 1, and is used by rewinding and cutting the used length. Resonance label 3
Are easier to sense when they are arranged at equal intervals.

Next, the structure of the detection device 7 will be described with reference to FIGS. The detection device 7 is composed of a substantially annular antenna portion 8, a signal processing portion 9, and an operating handle portion 10. As shown in FIG. 6, the antenna unit 8 includes
A transmitting antenna 11 and a receiving antenna 12 are provided. The signal processing unit 9 includes an amplifier circuit 13 for amplifying the signal transmitted from the transmitting antenna 11, and the amplifier circuit 1
3, a modulation circuit 14 for modulating the signal output from the amplifier 3, an amplification circuit 15 for amplifying the signal received by the receiving antenna 12, and a signal output from the amplification circuit 15 in synchronization with the modulation circuit 14. Detection circuit 16 for detecting
And a microprocessor 17 that determines information on an object based on a signal output from the detection circuit 16. Transmission and reception from each of the transmitting antenna 11 and the receiving antenna 12 are alternately repeated while changing the frequency, as shown in the timing chart of FIG.

Next, the object detecting sensor 1 having the above structure
Is used as follows. For example, when detecting buried objects such as water pipes, gas pipes, and cables for information transmission buried in the ground, when these buried objects are made of metal, at a site 30 cm from the ground above the buried object, The object detection sensor 1 is arranged along the buried object, or is arranged near the buried object.

When the buried object is made of plastic or concrete, the object detecting sensor 1 can be directly attached to the buried object. In this case, an adhesive layer is provided on one side or both sides of the tape-shaped film 2 of the object detection sensor 1.

As described above, in order to identify the type of the buried object in which the object detecting sensor 1 is set and other information,
As shown in FIG. 5, the operating handle 10 is arranged while the antenna portion 8 of the detection device 7 is placed along the ground surface of the portion where the embedded object is embedded.
Operate to move.

As a result, the receiving antenna 12 of the detecting device 7 is transmitted from the resonance label 3 of the object detecting sensor 1.
The microprocessor 17 can determine the type and other information of the buried object according to the resonance frequency received by, and can confirm the type and other information of the buried object.

Therefore, in the object detecting sensor 1, the resonance frequency of the resonance label 3 mounted on the tape-shaped film 2 is variously changed in accordance with the type of the buried object, other information, etc. The microprocessor 17 can determine the type of buried object and other information according to the resonance frequency received by the receiving antenna 12 of FIG.

For example, a resonance label set to a certain resonance frequency is set in the gas pipe, and a resonance label set to another resonance frequency different from the above resonance frequency is set in the water pipe to set a buried object. Is a gas pipe or a water pipe. That is, in the object detection sensor 1, the resonance label 3 attached to the tape-shaped film 2
By changing the resonance frequency of the above variously, various information can be input corresponding to the resonance frequency. Further, the type and information of the tube can be identified by changing the interval (mounting pitch) of the resonance labels 3 to be set.

According to the object detecting sensor 1 having such a structure, a plurality of resonance labels 3 forming a resonance frequency circuit resonating with a radio wave of a specific frequency are laminated and attached to the tape-shaped film 2 at predetermined intervals. Since the tape-shaped film 2 is arranged in the ground along the buried object, the resonance labels 3 can be collectively arranged at a large number of places in the buried object, and Since it is not necessary to individually provide sensors at a large number of locations, it is not necessary to perform complicated sensor placement work when burying an embedded object in the ground. In particular, for buried objects that are continuous to a predetermined length, such as water pipes, gas pipes, and information transmission cables, the sensor can be set very easily, and does not require much labor and time.
Workability is greatly improved.

Further, since the tape-shaped film 3 is simply handled and managed, the handling and management of the sensor is easy.

Further, in the above embodiment, the tape-shaped film 2 itself is formed of a waterproof film material,
Since the resonance label 3 is laminated and mounted on the tape-shaped film 2, the waterproofness of the resonance label 3 can be ensured, and even if rainwater or the like touches the sensor 1, there is no effect.

In the above embodiment, the object detection sensor 1 is used to identify the type of buried object in the ground and other information, but the object incorporated in the wall or floor of the building is described. It is also possible to identify the type and other information. Also, not limited to the type of object and other information,
It is also possible to detect water leaks from water pipes, gas leaks from gas pipes, and radiation leaks. In this case, the resonance label 3 needs to be touched by water, gas, or the like. In this case, the resonance label 3 may be directly attached to the tape-like film 2 without laminating the resonance label 3 on the tape-like film 2.

The uses of the object detecting sensor 1 are summarized as follows. (1) Detecting buried objects (underground, asphalt, concrete, stones, tiles, bricks, etc. through all inorganic substances such as water pipes, gas pipes, information transmission cables, etc.) (2) Buildings Detection of objects embedded in walls and floors (detection of water pipes, gas pipes, information transmission cables, etc.) (3) Detection of water leaks, gas leaks, and radiation leaks (4) Use as division lines for land ( A line that cannot be seen from the surface is drawn in the ground by the object detection sensor)

In the above embodiment, the tape-shaped film 2 is formed by laminating a plurality of resonance labels 3 constituting a resonance frequency circuit resonating with a radio wave having a specific frequency at predetermined intervals. The tape-shaped film 2 itself is formed of a polyolefin resin film such as polyethylene or another synthetic resin film as a dielectric, and a metal foil such as an aluminum foil is extruded or heated on both surfaces of the tape-shaped film 2 (dielectric). A material bonded by a method such as pressure bonding may be manufactured as a substrate material.

Further, although the resonance label 3 is applied as the resonance device in the above-mentioned embodiment, the resonance label 3 is not limited to the resonance label 3 and, in short, the resonance label 3 is applied to radio waves of a specific microwave or magnetic wave transmitted from the detection device. Any resonance device may be used as long as it constitutes a resonance frequency circuit that resonates.

Although the present invention has been described with reference to particular embodiments, it is not limited thereto, and it is understood by those skilled in the art that the scope of the claims attached to the present invention. It should be noted that various changes and modifications can be made without departing.

[0039]

As described above, according to the object detecting sensor of the present invention, a large number of resonance devices forming a resonance frequency circuit resonating with a radio wave of a specific frequency are provided at predetermined intervals on a long tape-shaped member. Since it is configured to be mounted for each unit, the mountability can be improved, and the handleability and manageability can be facilitated, which is very useful.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an object detection sensor according to the present invention.

FIG. 2 is an exploded perspective view showing a configuration of a resonance label according to the above embodiment.

FIG. 3 is a sectional view of the above resonance label.

FIG. 4 is a circuit diagram showing an LCR circuit of the above resonance label.

FIG. 5 is a perspective view illustrating the appearance and usage of the detection device.

FIG. 6 is a block diagram showing the configuration of the above detection device.

FIG. 7 is a timing chart showing forms of transmission and reception in the above detection device.

[Explanation of symbols]

 1 Object Detection Sensor 2 Tape Film 3 Resonance Label 7 Detection Device

Claims (1)

[Claims] 1. A long tape-shaped member having a predetermined length, to which a plurality of resonance devices constituting a resonance frequency circuit resonating with a radio wave of a specific frequency transmitted from a detection device are mounted at predetermined intervals. An object detection sensor characterized by the above.