JPH06509162A - Device for detecting buried electromagnetically detectable elongated objects - 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] Device and method for detecting buried electromagnetically detectable elongated objects Technical document condition The present invention provides an apparatus and method for detecting buried electromagnetically detectable elongated objects. It is about law. The object may be, for example, an iron pipe or a metal cable. It can be detected if Alternatively, it can be made detectable with a tracer. This outfit The station comprises transmitter means and receiver means for electromagnetic signals. Transmitter means and receiver The means is coil fi! ! ! It can be done. The transmitter means is capable of forming an electromagnetic field. Ru.

The electromagnetic field is coupled into receiver means in the presence of a detectable object. Meanwhile, that Electromagnetic coupling is handled and can be detected visually, with an alarm or to stop excavator operation. indicates the existence of such an object.

Known techniques include U.S. Pat. Nos. 4,600,358, 4,008,481 and 3° No. 907.136, and No. 3,858,737. For reference All of these U.S. patents are included in this description.

Known devices and methods include generating a signal in response to the presence of an electrically detectable object. However, the drawback is that it is not possible to accurately indicate the location of the object. Therefore You may find objects or avoid them while digging in the ground. It becomes difficult. Another drawback of the known device is that the iron parts of the excavator are between the transmitter and the receiver. The device cannot be fixed to the excavator due to magnetic coupling. Known equipment ( Attach the transducer part to the hoe of the excavator. So The transducer and its connection to the signal processing equipment inside the excavator are susceptible to abrasive effects and shocks encountered during operations.

Summary of the invention In order to alleviate the disadvantages, the present invention provides for the transmitter means or the receiver means to have less electromagnetic shielding means covering a spatial angle of 180'', either the transmitter means or the receiver means; Alternatively, a device provided for both is provided. The electromagnetic shielding means is, for example, dish-shaped. can be provided in the form of electromagnetic shielding in the form of a plate, in which case the transmitter means and the receiver The vessel means are fixed to the (recessed) side of the dish. The shielding is very effective. This allows the convex side of the dish to be fixed to the side facing downwards of the excavator. Thereby Do not place the transducer part of the equipment in a location where it is susceptible to shock (i.e., Easy connection of transducers to central processing and display equipment near the controller Can be done.

In a preferred embodiment of the invention, each transmitter means or each receiver means primarily A cup-shaped electromagnetic shield is provided. Using multiple transmitter means and receiver means and is directed by the combination of a pair of transmitter means and receiver means. It is possible to detect the position or orientation of an object. Each transmitter means or each receiver The electromagnetic shielding, primarily in the form of a tip, attached to the transmitter means and the receiver means.

If the transmitter means and the receiver means further include another common electromagnetic shielding means, the excavator A very high degree of shielding is provided from the iron parts.

It is also desirable to place the transmitter means and receiver means all along a primarily flat perimeter. Delicious. Also, the detector is arranged along the periphery with one receiver means and one transmitter means. configured to be arranged at a distance, detect a signal generated by said object, and detect the signal generated by said object. These transmitters are equipped with electronic control circuitry that can be converted into another signal indicating the orientation of the object. Preferably, the receiver means is connected to the receiver means.

In another embodiment of the invention, the transmitter means and the receiver are connected when said object is not present. Aids in electrically balancing erroneous signals generated by undesired coupling between means Equipped with a circuit. This balancing auxiliary circuit prevents disturbing erroneous signals.

The method of the invention is characterized in that the detection device is provided on the downward facing side of the vehicle and the electromagnetic signal is It is unique in that it emits light toward the ground. The radiation is mainly in the surrounding area. alternately from one of a plurality of transmitter means located along the line. Detectable If there is a capable object, the signal is located primarily along the same perimeter. is received by coupling to receiver means located therein. one transmitter means and one receiver hand The electromagnetic coupling by the control circuit between the pair of stages is such that the orientation with respect to the vehicle is is visually presented as a straight line with an orientation corresponding to the orientation of . That's it It is possible to inform the excavator's excavator of the location of buried objects. be. Since the location of the equipment on the excavator is known, it is possible to plan the excavation operation. It is possible.

drawing Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a partial sectional view of an excavator equipped with a device according to the invention.

FIG. 2 shows a first embodiment of the device viewed from below.

FIG. 3 shows a cross section taken along line mm in FIG.

FIG. 4 shows a second embodiment of the device viewed from below.

FIG. 5 shows a cross section taken along line -rV in FIG.

FIG. 6 shows a schematic overview of the control circuit of the device of the invention.

FIG. 7 shows a more detailed diagram of the controller and transducer arrangement of the control circuit.

FIG. 10 shows a representation of the relative positions of the excavator and the detectable object.

Description of examples A first embodiment of the device of the invention is a transducer as shown in FIGS. 2 and 3. 10.

The part 10 faces below the excavator 1 in the form of a tractor as shown in FIG. Preferably, it is attached to part 3. Device 10 includes electromagnetic shielding 12 . That electricity Several transmitter-receiver devices 14 are fixed on the hollow side of the magnetic shield. device 14 are distributed along the periphery within the annular collar 16 of the shield 12. The shield 12 prevents magnetic field lines from Made of a known type of electromagnetic material that reflects easily, for example the so-called mu-metal be done.

Each transmitter-receiver device 14 has an individual, primarily cup-shaped electromagnetic shield 18 . This shield is connected to the signal processing device 121 by a signal transmission cable 20. outfit The station 21 is a combination machine installed near the operator's seat 6 of the excavator 1. connected to the controller and display device 5.

The transmitter-receiver device 14 includes a transmitter coil for emitting an electromagnetic field and a transmitter coil for detecting the electromagnetic field. and a receiver coil for output. Spatial angle covered by shields 16 and 18 A is greater than 180 degrees, see Figure 3. The shield 16 is located near the excavator 1 (part 3). The shield 18 is blind acting as a shield to the body, and the shield 18 is a mutual shield of the transmitter-receiver device 14. Acts as a shield.

The recessed side or center of the shield 12 is used to physically protect the device 10 during operation. The empty side can be filled with a filler material 24 that is wear-resistant, durable, but non-magnetic. Ru. In FIG. 2 material 24 has been omitted.

A second preferred embodiment of the apparatus of the present invention is shown at 30 in FIGS. 4 and 5.

In this embodiment, an inner magnetic shield 32 and an outer magnetic shield I34 are provided. outside The partial shield 34 is provided with the Internal shielding on all sides 3) A distance between the two shields 32 and 34 surrounding the known Filled with N class elastic filling in+. First, it is filled with a semi-liquid substance. hardens into a solid, foam-like object 36.

Internal shielding 32-kun, yaikku〉ka cノ) Transmitter-receiver 2 list Tobe Juko (S1).

As in the first example of Liu, ζ 5;, so 7. These devices are peripheral (6, along) 7 distributed. As shown, the number is 6. Is it important to do it? Run, but three or more optional Also, the space between the mounting 14 and the shield 32 can be filled with the number ζ of the first embodiment. = Filled with the same type of substance as in the container.

1 Diagram for transmitting electrical signals'! 5. The non-toxic wire is routed through the shield 32. It extends between the transmitter device 38 and the receiver device @39. Both 38 and 39 are externally shielded It is fixed to 34. (Reni, Ii) R3f3 and :39 are IE1! old age physics protected.

The shields 32 and 34 are at least 18 Covers a spatial angle of 0゛.

The electronic circuits provided for both embodiments are shown in FIGS. 6-9.

FIG. 6 shows Llls 1! of the battery 44 for the circuit. Indicate the source. The battery is inside the package [5]. It is connected via a key 45 and a fuse 46 to the mm meter circuit 40 provided in the It will be done.

Controller circuit 40 includes transducer section 10.30. exchange signals with the sensor auxiliary circuit.

An enlarged detailed view including circuits 40 and 42 is shown in FIG. EMC and electricity The source interface is shown at number 48. The current flows through it to the power supply @50 supplied to Power and signal exchanges are indicated by arrows in the diagram.

Power is supplied to the microcomputer device 152, which connects the power supply and microcomputer. The state of the data storage device 52 is constantly controlled by the power monitoring H1154. No power supply The microcontroller will be activated even if the rule is stopped or turned on. If the computer 52 does not function, a device 54 will issue an alarm. and transmit signals via the transmitter device 156 and the receiver and transmitter interface 58. can be exchanged. The receiver and transmitter interface 58 is a transmitter- It is again connected to the receiver circuit Mho, 62.

The obtained signal is processed by device 52 and then visually displayed on display device 1B4 of ma. displayed. 1l152 function mode with keyboard and LEDR direct 66 direct Top 6 Can be monitored and changed. Furthermore, the existence of a detectable object is When attention should be drawn, a buzzer alarm 68 is connected to device 52A.

: Ginpuke device i52 Sho is IE'@, the object that attracts the stomach is the transmitter--receiver. When the transmitter means is within sight of the transmitter device 14? : of receiver means It was caused by an unwanted combination between! Electrical balance of l signal 8. The ribs are broken.

A receiver circuit is shown schematically in FIG. In this figure, 70 represents the receiver fill. 125.71 shows the amplifier. The receiver circuit is equipped! 112i and receiver equipment 39mm included.

The transmitter circuit is shown in FIG. This transmitter circuit consists of transmitter gamma builer 3 and amplifier. 74 is shown. The power supply to those two circuits is not shown in .The transmitter circuit is Device 21 and transmitter device 38 are shown.

All components of the circuit and auxiliary circuits are available to those skilled in the art.

The functionality of the device of the invention may be as described below. one device 14 generates an electric field, and during that time, it faces the generator w14 geometrically. When the receiving circuit of another device 14 located is activated for reception of the signal, The magnetic coupling between the transmitter device and the receiver device can be achieved, for example, by a vibrator 7 or a cable 8. , a signal is sent to the computer device 52, and a buzzer alarm is activated. When the device 68 is turned off, a line indicating the direction of the vibrator 7 or the instant pull 8 is displayed on the display device 64. shown.

The mR appearing on display 64 is shown in FIG. This diagram shows the tractor l. A contour 80 is shown. Display device 64 is known! GL class figures 1. CD display It is a device. Which pair of devices 14 placed opposite each other is connected to object 7 or 8 When the device 52 finds that it is magnetically coupled to the vibrator 7* or the cable 8 A line is generated to indicate the direction of. The direction of extension of object 7.8 is connected to a pair of devices 14 is approximately the same as the line J: Therefore, the display device 64 shows the object 7 relative to the excavator 1. ．． Direction A of 8 can be shown.

Then the operator of the excavator 1 operates according to the position of the cable 8 or the vibrator 7. IllgE can do the work. Excavator ■ Transducer installation flo, 30 Since the position of bar 7 or cable 8 is well known, It is possible to

There are several ways to implement the apparatus and method of the invention without departing from the spirit thereof. You can change it with .

r once L+llll --mu Fig, 9 Handbook Supplementary Book Heisei Year Month Day 1. Indication of the incident: Japanese Patent Application No. 4-506495 2, title of the invention Device 3 for detecting a buried elongated object that can be detected electromagnetically; Relationship to the case: Patent applicant Nielsen, Kristen 4. Agent Address: Hidewa Tameike Building, 2-4-2 Nagatacho, Chiyoda-ku, Tokyo, Yamakawa International Patent Office Inside (1) Specification (2) Scope of claims 6. Contents of amendment (1) Change the title of the invention in the specification to “a buried elongated object that is electromagnetically detectable”. "detecting device".

(2) Delete “The method of the present invention is...” from lines 20 to 9 on page 2 of the specification. The scope of the claims 1. A device for detecting buried elongated objects that can be electromagnetically detected, all of the transmitter means and receiver means are equally spaced from each other along a flat circumference; It is equipped with a plurality of electronic detectors and an electronic control circuit. A path converts the signal generated by the detector into another signal indicating the orientation of the object relative to the device. in a device designed to convert the signal into a signal and connected to said detector, The electronic detector comprises transmitter means and receiver means for transmitting and receiving electromagnetic signals. , one receiver means and one transmitter means transmit signals generated by said object. The transmitter means and/or the receiver means include a transmitter hand. The trick is primarily to cover a spatial angle of at least 180° to the stage or receiver means. A buried electromagnetically detectable device characterized by the fact that it is provided with a type of electromagnetic shielding. A device that detects elongated objects.

2. The device according to claim 1, wherein the control circuit operates when the object is not present. Electrically eliminates false signals generated by undesired coupling between transmitter means and receiver means device with an auxiliary circuit for equilibrium.

international search report myu5lla++sl A#lilcslim # & PCTΔ)K 9210 0073 International Search Report Continuation of front page (81) Designated countries EP (AT, BE, CH, DE.

DK, ES, FR, GB, GR, IT, LU, NiC, NL, SE), 0A (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, SN, TD, TG), AT, AU, BB, BG, BR, CA, CH, C3, D.E.

DE, DK, ES, FI, GB, HU, JP, KP, KR, LK, LU, MG, MN, MW, NL, NO, PL, RO, RU, SD, SE, 　US

Claims (6)

[Claims] 1. a buried electromagnetically detectable elongate device comprising transmitter means and receiver means; Apparatus for detecting an object, the transmitter means or receiver means or both comprising: an electromagnetic device covering a spatial angle of at least 180° relative to the transmitter means or the receiver means; Buried electromagnetically detectable elongate object characterized in that it is provided with a shield. A device that detects the body. 2. 2. The apparatus of claim 1, wherein the apparatus comprises a plurality of transmitter means and receiver means. and each transmitter means or receiver means is provided with a primarily cup-shaped electromagnetic shield. equipment. 3. 3. The apparatus of claim 2, wherein the transmitter means and the receiver means are provided with separate electromagnetic shielding. A device that has in common. 4. Apparatus according to any one of the preceding claims, comprising transmitter means and receiver means. The signal means are all located primarily along a flat perimeter and are spaced apart along the perimeter. at least one receiver means comprising one receiver means and one transmitter means one detector is configured to detect a signal generated by the object, and an electronic control circuit connected to the transmitter means and the receiver means for directing the orientation of the object; device capable of exchanging that signal to another signal indicated by said control circuit. 5. 5. The apparatus according to claim 4, wherein the control circuit is configured to control when the object is not present. Electrically eliminates false signals generated by undesired coupling between transmitter means and receiver means device with an auxiliary circuit for equilibrium. 6. A detection device located on the side facing downwards of the vehicle detects the electromagnetic signal. radiates toward the ground, and the radiation is transmitted by multiple transmitters placed primarily along the perimeter. originating alternately from one of the signal means, said signal being the same when said object is present. By magnetically coupling to receiver means located primarily along the periphery. The electromagnetic coupling consisting of one transmitter means and one receiver means is received and controlled by a control circuit. a straight line whose orientation with respect to the vehicle corresponds to the orientation of the object; buried electromagnetically detectable characterized by being visually presented as How to detect elongated objects.