JP2002131309A - Ground surface layer pollution detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make rapidly examinable an extensive polluted site in a labor- saving manner by traveling the ground surface of the polluted site in an unmanned manner and automatically detecting gases evolved from the soil while moving. SOLUTION: A gas detector body part 13 is provided on a remote-controlled vehicle 8. The vehicle 8 has a remote-controlled operation controlling part 11 and self-traveling power other than internal combustion engine power. The body part 13 is data-linked to a personal computer 14 for storing measured data, a gas analysis data storing/processing means. A gas suction part 18 connected to the body part 13 is mounted near the ground side of the vehicle 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting surface contamination of a ground surface, which is used for investigating a contaminated ground often found in a chemical factory, an oil refinery, or a site of a factory.

[0002]

2. Description of the Related Art Investigation of soil contamination mainly involves analysis of a sampling core by boring, which is time-consuming and expensive.

On the other hand, in recent years, by detecting the surface gas of the ground, the degree of contamination of the surface of the contaminated ground has been relatively grasped, and the methods include a passive method and an active method.

The passive method is an activated carbon adsorption / electromagnetic heating desorption mass spectrometry method. As shown in FIG. 6, a test tube-sized gas collector 1 is buried in a hole of about 4 cm in diameter and about 30 cm in the ground formed in the ground surface. Then, cover with a metal lid 2 and collect after standing for 1 to 2 weeks.

The active method includes a detection tube method, a portable gas chromatography method, and an adsorption / thermal desorption / GC method. In the detection tube method, a target gas is determined as shown in FIG. A gas body is inserted into a hole having a depth of 100 cm and a constant volume suction is performed.

In the portable gas chromatography method, a tube 5 is inserted into a hole having a diameter of 2 cm and a depth of 100 cm as shown in FIG.

In the adsorption / thermal desorption / GC method, as shown in FIG. 9, an adsorption tube 6 is inserted into a hole having a diameter of 2 cm and a depth of 100 cm, and a constant volume of gas is sucked by the action of a pump 7.

[0008]

The conventional simple surface gas survey techniques described above all use a surface ground of 20 to 10 meters.
It is necessary to make a hole having a depth of about 0 cm, it takes a long time for analysis, and it takes time and effort to perform many measurements and evaluations.

[0009] The present invention is not a device for detecting surface contamination of the ground but a device for detecting a leaked gas. Some devices have a detecting device provided in a moving mechanism. For example, the actual fair 5-8506
In Japanese Patent Application Publication No. 4-55557 and Japanese Utility Model Application Publication No. 4-544, a detection device is provided on a bogie including front and rear wheels and a frame assuming that the handle is moved by hand.
In Japanese Patent Publication No. 30, a gas detection device is provided on a base provided with wheels, which is also a push type.

However, since the above-mentioned mobile gas leak inspection device performs a gas leak inspection while pushing the base by hand, it requires power to move, although it is equipped with wheels. It is also difficult to increase the speed, and the inspection work takes time. In Japanese Patent Application Laid-Open No. H11-132894, a wheel is configured as a three-wheeled bicycle, a housing box for gas detection means is disposed above a wheel provided with two wheels of the three-wheeled bicycle, and a gas suction port is provided for housing a storage port. It is arranged below the box with the ground separated.

A three-wheeled bicycle is a known one in which a motor for auxiliary output is motively connected to a pedal shaft of a normal three-wheeled bicycle, and has a detachable storage battery. When the forward torque exceeds the set value, the electric motor is driven to reduce the load on the foot. The inspector rides the tricycle toward the inspection location, slowly runs the tricycle while listening to the alarm sound, stops, and activates the portable gas detector stored in the detector storage location. To confirm the location of the gas leak.

This mobile gas leakage inspection device of the three-wheeled bicycle type performs inspection by a portable gas detector by hand as in the conventional case, and although the operator moves by bicycle without walking, The labor of the operator is required, and the detection work is manually performed and the operability is poor.

An object of the present invention is to solve the above-mentioned disadvantages of the prior art and to detect the gas generated from soil automatically and moving while traveling uninhabited on the ground surface of the contaminated site. It is an object of the present invention to provide an apparatus for detecting surface contamination of the ground, which can be quickly and labor-savingly investigated.

[0014]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention firstly provides a remote control vehicle having a gas detection device main body in a remote control vehicle having a self-propelled power other than the internal combustion engine power. A gas suction unit connected to the gas detection device main body is provided near the ground side of the remote control vehicle, and the gas detection device main body is data linked to the gas analysis data recording processing means. The detection device main body and the gas analysis data recording processing means are both mounted on a remote control vehicle. Third, the analysis data recording processing means is separate from the remote control vehicle. It has a position detecting means, and the position data obtained by the position detecting means is data linked to the gas analysis data recording processing means. It, the fifth, the gas suction portion provided on a remote control car are those summarized in that provided via a rotatable arm having a wheel at its distal end to the vehicle body lower surface.

According to the first aspect of the present invention, since the traveling control of the apparatus is performed by a remote controller and the operation is performed without manual operation, the apparatus can be moved quickly over a wide area without being affected by the weather such as rainy weather. Moreover, there is no possibility that the driver inhales a toxic gas such as a volatile organic compound. In addition, with the 4WD specification, it is possible to travel even if there is unevenness of 20 cm or more.

Further, since the remote control vehicle has a self-propelled power other than the power of the internal combustion engine such as an electric motor, it does not suck organic gas components in exhaust gas from a prime mover such as a vehicle equipped with a gasoline engine or a diesel engine.

According to the second aspect of the present invention, in addition to the above-mentioned functions, both the gas detection device main body and the gas analysis data recording processing means can perform measurement processing on the spot by being mounted on a remote control vehicle. is there.

According to the third aspect of the present invention, since the analysis data recording processing means is separate from the remote control vehicle, the number of devices mounted on the remote control vehicle can be reduced, and the data from the gas detection device main body can be reduced. The data can be transferred to the analysis data recording processing means at another location using a medium such as an FD (floppy (registered trademark) disk) or a communication means.

According to the present invention, the remote control vehicle has position detecting means, and the position data obtained by the position detecting means is data-linked to the gas analysis data recording processing means, The data of the position detection means is taken into the gas analysis data recording processing means, and the position data and the gas concentration data can be correlated and output as a plane gas concentration distribution map.

According to the fifth aspect of the present invention, since the gas suction unit is attached to the tip of the arm together with the wheel, the gas suction unit can be brought as close as possible to the ground surface, and is not directly grounded. Sufficient detection is possible even if the moving speed is increased. In addition, the suction path is clogged by sucking the sand and dust together with the trapped gas, and the gas sensor is deteriorated and the durability is deteriorated due to the sand and dust. In particular, if the gas suction part is made of an elastic material and a dustproof filter is incorporated therein, suction of sand and dust can be prevented.

[0021]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a plan view showing one embodiment of a surface contamination detection device for ground of the present invention. FIG. 2 is an upper side view of the same. Reference numeral 8 denotes a remote control vehicle having self-propelled power other than internal combustion engine power. , Drive motor, steering motor (not shown), traveling power source (battery) 10,
It has a remote control operation control unit 11.

The remote control vehicle 8 is a speed control motor driven by a 24 V DC power supply 10 as a traveling drive system, and has a front-rear independent suspension, 4WD, and 4WS specifications. Is for high block rain.

The remote control operation control unit 11 is connected to a remote control antenna 12 as a wireless traveling device.

On the body of the remote control vehicle 8, a gas detection device main body 13 and the gas detection device main body 1 are mounted.
A personal computer 14 for recording measurement data and a control power supply (battery) 15 as gas analysis data recording processing means, which is data-linked to 3, are mounted. The gas detecting device main body 13 has a commercially available high-sensitivity gas detecting device (name: 1312 Photo acoustic Multi).
-Gas Monitor Manufacturing: INNOVA Ai
r Tech Instrument).

Further, the remote control vehicle 8 may be equipped with a wireless communication means 22 for transmitting data from the personal computer 14. As the wireless communication means 22, a wireless device, a mobile phone, or the like can be used.

The remote control vehicle 8 has a GPS position detecting device 23 having a GPS (global positioning system) antenna 23a as position detecting means.
The GPS position detecting device 23 and the personal computer 14 are connected to each other, and the GPS position detecting device 23
The position information obtained by the position detection means is taken into the personal computer 14 so that the position data obtained by the position detection means is data-linked to the gas analysis data recording processing means.

A rotatable arm 16 is provided on the lower surface of the vehicle body of the remote control vehicle 8, and a wheel 17 and a gas suction unit 18 connected to the gas detector main body 13 by piping are attached to the tip of the arm 16.

FIGS. 3 and 4 show the details, in which the arm 16 is formed by a link mechanism of two parallel bars with their ends axially mounted, and the gas suction section 18 is a cylindrical cover 19 having an open bottom. The cover 19 is provided with a skirt 20 made of a flexible sheet (gel sheet) so that the skirt 20 comes into contact with the cover 19 at the time of grounding so that no gap is formed at the lower end of the cover 19.

The wheels 17 are located on both outer sides of the cover 19,
In addition, a Teflon (registered trademark) tube 21 is used as a pipe connecting the gas suction unit 18 and the gas detection device main body 13, and the tube 21 extends along the arm 16.

Next, the usage will be described. The device of the present invention sucks the surface gas with the gas suction unit 18 while running the remote control vehicle 8 and
Measures the concentration (relative value in terms of toluene) of the ground surface gas pump-suctioned through the gas suction unit 18 by a built-in odor sensor, and records the measurement data in the personal computer 14.

The running speed of the remote control vehicle 8 is the traveling speed of the axle (0 to 40 m / smin), and the measurement interval of the surface gas is adjusted by a combination of this traveling speed and the suction speed of the gas detector (one time / 5 to 50 sec). I do.

As a general detection method, measurement lines are provided in the target ground area at intervals of 1 to 2 m, and the measurement is performed on the measurement lines by a gas detection device, and mesh data is recorded.

As a data processing method, the recording result of the personal computer 14 is stored in a floppy disk, processed offline by a personal computer 24 in an office or the like, and output by a printer 25. The measurement gas concentration data measured by the gas detection device and the measurement position data measured by the GPS position detection device 23 are processed by PC software, and the output of the result output by the printer 25 is as shown in FIG. Figure. The gas concentration distribution is expressed as a relative distribution based on the converted toluene concentration from the characteristics of the apparatus.

Instead of such off-line processing using a floppy disk, it is also possible to transfer the data to the personal computer 24 by using the wireless communication means 22. In this case, real-time measurement while traveling is possible. .

In the above embodiment, the gas detector main body 13 is used.
The personal computer 14 for recording measurement data and the power supply (battery) 15 for measurement as gas analysis data recording processing means are both mounted on the remote control vehicle 8. The data recording processing means may be separate from the remote control vehicle 8.

[0036]

As described above, the surface contamination detecting apparatus for ground surface of the present invention travels uninhabited on the ground surface of a contaminated site and can detect gas generated from soil automatically and while moving, so that it can be widely used. This enables quick and labor-saving investigation of various contaminated sites.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of an apparatus for detecting surface contamination of a ground surface according to the present invention.

FIG. 2 is a side view showing an embodiment of the ground surface contamination detection device of the present invention.

FIG. 3 is a side view showing details of a gas suction portion and an arm portion provided with the gas suction portion of the surface contamination detection device for ground of the present invention.

FIG. 4 is a plan view showing details of a gas suction portion and an arm portion provided with the gas suction portion of the surface contamination detection device for ground of the present invention.

FIG. 5 is a gas concentration plane distribution diagram showing an output example.

FIG. 6 is an explanatory diagram showing a first example of a conventional example.

FIG. 7 is an explanatory diagram showing a second example of the conventional example.

FIG. 8 is an explanatory diagram showing a third example of the conventional example.

FIG. 9 is an explanatory diagram showing a fourth example of the conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Gas collector 2 ... Lid 3 ... Detection tube 4 ... Gas pack 5 ... Tube 6 ... Suction tube 7 ... Pump 8 ... Remote control car 9 ... Wheels 10 ... Power supply for running 11 ... Remote control operation control unit 12 ... Remote control antenna 13 ... Gas detector main unit 14 ... Personal computer 15 ... Control power supply 16 ... Arm 17 ... Wheels 18 ... Gas suction unit 19 ... Cover 20 ... Skirt 21 ... Teflon tube 22 ... Wireless communication means 23 ... GPS position detector 23a ... GPS Antenna 24 ... Personal computer 25 ... Printer

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Michio Tsuchihiro, Inventor Kashima Construction Co., Ltd. 1-2-7 Moto Akasaka, Minato-ku, Tokyo (72) Inventor Akiko Sato 1-2-Chome Moto-Akasaka, Minato-ku, Tokyo 7 Kashima Construction Co., Ltd. (72) Inventor Keisaku Yasumoto 1-2-7 Moto-Akasaka, Minato-ku, Tokyo

Claims (5)

[Claims] 1. A gas detection device main body is provided in a remote control operation control unit and a remote control vehicle having self-propelled power other than the internal combustion engine power, and the gas detection device main body is connected to a gas analysis data recording processing means by a data link. And a gas suction unit connected to the gas detection device body near the ground side of the remote control vehicle. 2. The soil surface contamination detection device according to claim 1, wherein both the gas detection device main body and the gas analysis data recording processing means are mounted on a remote control vehicle. 3. The soil surface contamination detecting device according to claim 1, wherein the analysis data recording processing means is separate from the remote control vehicle. 4. The remote control vehicle according to claim 1, further comprising a position detecting means, wherein the position data obtained by the position detecting means is data-linked to the gas analysis data recording processing means. For detecting surface contamination of the ground. 5. The surface layer of the ground according to claim 1, wherein the gas suction portion provided on the remote control vehicle is provided on a lower surface of the vehicle body via a rotatable arm having a wheel at a tip end thereof. Pollution detector.