JPH0262910A - Building berth positioning method - Google Patents

Abstract

PURPOSE:To measure the position of a building berth in a short time by providing an automatic tracking light wave range finder combinedly used as a transit and a gyrocompass. CONSTITUTION:The automatic tracking light wave range finder combinedly used as the transit 3 projects laser light on a reflecting mirror 5 by an attached laser light emitting device and photodetects its reflected laser light to grasp the position of the reflected light 5 for automatic tracking, thereby measuring and displaying a horizontal angle, a vertical angle, and a distance which are generated by the movement. Further, the gyrocompass 4 measures an error in the angle to a specific azimuth and converts it into an electric signal to display its numeral. Then a computer 6 stored with a specific calculation expression performs specific calculation based upon data from measuring instruments 3 and 4 to display the current position of the building berth 1 on a graphic display momentarily.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field The present invention relates to a method for positioning a work boat on the sea.

(b) Prior art The conventional method of positioning a work boat on the sea was to use equipment such as a light wave distance meter or transit at a measuring point, but it was done by sighting from a surveying point and using the ship's platform to measure Illll values. Because it took a long time to calculate the position, it was difficult to accurately grasp the constantly changing position of the workboat.

Therefore, a method of automatically surveying using an automatic tracking light wave distance meter (Special Publication No. 58-30525) has recently been adopted for ground improvement vessels, but this method is not suitable for measuring the current position of a work vessel. Since we only want to find the distance between the ship's optical distance meter and the telescope with a light source on the reference point side, it is inevitable to
A light wave rangefinder is required, and there is a limit to the divergence angle of the light emitted from the telescope with a light source, so there is a drawback that automatic tracking is not possible outside this range. Since deep-shallow 114 volume ships, magnetic survey ships, dredgers, etc. can move out of the range of the light divergence angle in a short time, it is necessary to aim the telescope with a light source in line with the automatic tracking optical distance meter installed on the work boat. It needed to be fixed.

Furthermore, since this method uses a battery or the like as a power source for the telescope with a light source, there are other problems such as the need to periodically replace the battery.

(C) - Disclosure of the Invention The present invention eliminates the need for the above-mentioned troublesome operations and the use of a telescope with a light source that requires a power source for a fixed reference point, and also reduces the number of devices used, allowing for automatic tracking. This invention proposes a method that can measure the position of a ship's berth in a short time using only two measuring devices: a light wave distance meter/transit and a gyro compass.According to the present invention, the position of a ship's berth can be performed quickly and economically. Hereinafter, details of the method of the present invention will be explained based on the drawings.

The automatic tracking optical distance meter/transit used in the present invention projects a laser beam toward a reflecting mirror using a laser emitter attached to the device.

It receives the reflected laser beam, captures the position of the reflecting mirror, automatically tracks it, and can simultaneously measure and display the horizontal angle, vertical angle, and distance caused by its movement.

Furthermore, the gyro compass used in the present invention is capable of measuring an angular difference with respect to a predetermined direction, converting this into an electrical signal, and displaying the result as a numerical value.

FIG. 1 shows the arrangement of the above-mentioned automatic tracking optical distance meter/transit and gyro compass used in carrying out the method of the present invention.
2 is a fixed reference base established on sea I:, a surveying platform or on land.

One automatic tracking lightwave rangefinder/transit 3 is installed at the end of the cradle 1, and one gyro compass 4 is installed on each of the berths. A mirror 5 is installed on a fixed base, a quasi-base 2.

, the two measuring instruments 3 and 4 are connected to the computer 6 on the platform 1 by lead wires 8.9, and the calculation 4
I! 6 is connected to a display section 7.

As shown in FIG. 2, the reflecting mirror 5 has a plurality of prisms 10 arranged on a cylindrical plate surface that reflect light in the same direction in which the light is incident, and receives and reflects light from a wide range. is configured to do so.

Further, the calculation formula described later is stored in the calculator 6, and the data from the both side gauges 3 and 4 are inputted to perform a predetermined calculation, and the display unit 7 displays the calculation formula for the ship's berth based on the calculated value from the calculator 6. The current position of the vehicle is displayed on a graphic display every moment.

(d) Calculation example Next, two calculation examples of the present invention will be explained with reference to FIG.

” 2 Automatic tracking light wave distance meter and transit 3 with reflector 5
and the angle θ1 between the reflecting mirror 5 and the platform l.
Measure.

On the other hand, the angular difference 02 with respect to a predetermined direction is measured using the gyro compass 4, and these data are input into a calculator 6 in which a predetermined calculation formula is stored in advance to calculate the position of point A (therefore, the position of the platform 1). do.

Point B (x7., yz) and azimuth angle θ in the figure. is a value determined by preliminary measurements.

In FIG. 3, A (X+, 7+) = Position coordinates of automatic tracking optical distance meter/transit 3 B (X2.V2) = Coordinates of reflector 5 position 1 = Measuring distance θ0. θ0 = Azimuth angle θ1, θ2 = Measurement angle Therefore, 0, = 06-〇.

x, = x, Jumon, cos (θ, -02) Vr = y2
+Qlsin (ol-θ-l) In this way, the digit 1 (A) of the platform l is obtained, and based on this, the coordinates of A, that is, the current position of the platform l, are displayed on the L display section 7. .

(e) Effects of the Invention According to the method of the present invention, the operator alone can quickly know the current position of the platform l by looking at the coordinates displayed on the display unit 7, and can position the boat to the next scheduled position. etc. can be easily done.

Moreover, since the method of the present invention measures the position using only two measuring devices, the above-mentioned automatic tracking optical distance meter/transit and one relatively inexpensive gyro compass, the automatic tracking optical distance measuring method is expensive. Compared to the conventional method that uses three or more devices, the cost of the devices used can be significantly reduced.

In addition, the method of the present invention only projects light from the optical distance meter toward the reflecting mirror, and unlike the conventional method, there is no need to provide a telescope with a light source on the reflecting mirror.Therefore, there is no need for a power source on the reflecting mirror. From this point of view, it is very economical and easy to maintain and manage.

Furthermore, since the method of the present invention uses only one automatic tracking type optical distance meter/transit, only one reflector is required to be installed on the reference base, and the coordinate values required for the reference base point can be measured at one location. It has the advantage of being extremely simple.

[Brief explanation of the drawing]

Figure 1 is a layout diagram of the measuring equipment used in the method of the present invention, Figure 2 is a configuration diagram of a reflecting mirror, and Figure 3 is a diagram of the method of the present invention. It is an S% principle diagram. Symbol explanation 1 - Boat platform 2 - Survey platform or land reference base 3 - Automatic tracking light wave distance meter and transit 4 - Gyro compass 7 - Computer display section 8 1O - Prism 5 - Reflector 6 - Weighing machine, 9 - Lead line National land General Construction Co., Ltd. Tachibana High School of Engineering Shiage, - La Figure 1 Figure 3 Figure 2

Claims (1)

[Claims] An automatic tracking optical rangefinder/transit and a gyro compass are installed on the ship's platform, and a reflector is placed at a fixed reference point that receives the collimation of the optical rangefinder/transit to determine the distance between them and the angle with the ship's platform. A method for positioning a boat platform, characterized in that the current position of the boat platform is displayed on a display section by simultaneously measuring the azimuth angle data from the gyro compass and inputting a predetermined calculation formula into a stored calculator. .