Stone dumping real time measuring system for stone dumping vessel

Abstract

A stone dumping real time measuring system for a stone dumping vessel includes a boom. The boom is mounted to a control cabin of the stone dumping vessel and can extend outwardly from the control cabin to be located above a predetermined stone dumping position. A signal line hangs from the boom. A floater is connected to the other end of the signal line. The floater is provided with a positioning device, a surge compensator, and a depth sounder. The floater freely floats on the water through the separate design of the floater and the stone dumping vessel. The floater is directly positioned by the positioning device of the floater, and the surge compensator is able to correct a measurement error of the depth sounder to instantly report the stone dumping result and to improve the accuracy and precision of the stone real time measuring system.

Claims

1. A stone dumping real time measuring system for a stone dumping vessel, the stone dumping real time measuring system being applied to a stone dumping vessel, the stone dumping vessel having a hull, a control cabin at a central portion of the hull, and a fallpipe located on the hull close to the control cabin, a mouth of the fallpipe being aligned with a predetermined stone dumping position when in use, the stone dumping real time measuring system being mounted to the control cabin and comprising a boom, a signal line, and a floater; the boom being mounted to the control cabin, the boom extending outwardly from the control cabin to be located above the predetermined stone dumping position; the signal line being connected to a free end of the boom; the floater being connected to the signal line and freely floating on the water, the floater being provided with a positioning device, a surge compensator, and a depth sounder, the depth sounder being capable of delivering a measuring wave beam towards a water bottom to instantly measure and report a stone dumping result of the stone dumping vessel; thereby, the floater freely floating on the water through the separate design of the floater and the stone dumping vessel, the floater being directly positioned by the positioning device of the floater, the surge compensator being able to correct a measurement error of the depth sounder to instantly report the stone dumping result.

2. The stone dumping real time measuring system for a stone dumping vessel as claimed in claim 1, further comprising a computing device disposed in the control cabin, the computing device being adapted to combine data obtained from the positioning device and the depth sounder and calculate measurement data and display the stone dumping result by means of 3D modeling technique.

3. The stone dumping real time measuring system for a stone dumping vessel as claimed in claim 1, wherein the positioning device is an RTK-GPS system which is able to position the floater accurately.

4. The stone dumping real time measuring system for a stone dumping vessel as claimed in claim 1, wherein the measuring wave beam of the depth sounder is an acoustic wave.

5. The stone dumping real time measuring system for a stone dumping vessel as claimed in claim 1, wherein the surge compensator is adapted for measuring a water surface instantaneous variation, and its measurement accuracy is up to 5 cm RMS.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a perspective view of the present invention mounted to a stone dumping vessel;

(2) FIG. 2 is a block diagram of a stone dumping real time measuring system of the present invention;

(3) FIG. 3 is a schematic view of the present invention when in use; and

(4) FIG. 4 is a schematic view of calibrating the depth sounder of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(5) Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.

(6) FIG. 1 is a perspective view of the present invention mounted to a stone dumping vessel. FIG. 2 is a block diagram of a stone dumping real time measuring system of the present invention. The present invention discloses a stone dumping real time measuring system for a stone dumping vessel. The stone dumping real time measuring system is applied to a stone dumping vessel 200. The stone dumping vessel 200 has a hull 201, a control cabin 202 at the center of the hull 201, and a fallpipe 203 located on the hull 201 close to the control cabin 202. The mouth of the fallpipe 203 is aligned with a predetermined stone dumping position when in use. The stone dumping real time measuring system is mounted to the control cabin 202, and comprises a boom 10, a signal line 20, a floater 30, and a computing device 40.

(7) The boom 10 is mounted to the control cabin 202. The boom 10 may extend outwardly from the control cabin 202 to be located above the predetermined stone dumping position.

(8) The signal line 20 is connected to a free end of the boom 10.

(9) The floater 30 is connected to the signal line 20 and freely floats on the water. The floater 30 is provided with a positioning device 31, a surge compensator 32, and a depth sounder 33. The depth sounder 33 is capable of delivering a measuring wave beam 34 towards the water bottom, as shown in FIG. 3, to instantly measure and report the stone dumping result of the stone dumping vessel 200. In the present invention, the positioning device 31 is an RTK-GPS system, which can accurately position the floater 30. The surge compensator 32 is adapted for measuring a water surface instantaneous variation, and its measurement accuracy is up to 5 cm RMS. The surge compensator 32 is able to correct the measurement error of the depth sounder 33. The measuring wave beam 34 of the depth sounder 33 is an acoustic wave.

(10) The computing device 40 is disposed in the control cabin 202. The computing device 40 is adapted to combine the data obtained from the operation of the positioning device 31 and the depth sounder 33 and calculate the measurement data and display the stone dumping result by means of 3D modeling technique.

(11) Referring to FIG. 1 in cooperation with FIG. 1 and FIG. 2, when the stone dumping vessel stops the operation of stone dumping, the boom 10 extends outwardly from the control cabin 202 to be located above the predetermined stone dumping position. The signal line 20 and the floater 30 are suspended from the boom 10. The floater 30 is free to float on the water. The depth sounder 33 of the floater 30 delivers the measuring wave beam 34 towards the water bottom at the predetermined stone dumping position. The floater 30 is positioned by the positioning device 31. The surge compensator 32 measures the water surface instantaneous variation to correct the measurement error caused by the surge when the depth sounder 33 measures. Finally the data obtained from the operation of the positioning device 31 and the depth sounder 33 are combined, and the measurement data is calculated by the computing device 40 and displayed by means of 3D modeling technique so that the user can instantly review the stone dumping result.

(12) FIG. 4 is a schematic view of calibrating the depth sounder of the present invention. The depth sounder 33 of the present invention is calibrated by a water depth correction plate 300. The water depth correction plate 300 is placed in the water at a fixed depth and the acoustic velocity of the depth sounder 33 is adjusted so that the reading of the depth sounder 33 is equal to the depth of placement of the water depth correction plate 300 to check whether the depth difference is within a reasonable range of instrument accuracy.

(13) It is worth mentioning that because the stone dumping operation will stimulate the silt at the water bottom to cause local seawater turbidity, the optical detection method cannot be implemented. The measuring wave beam 34 of the present invention is an acoustic wave. Although the acoustic wave may be somewhat affected by seawater turbidity, it can be corrected to eliminate a false signal and get the exact value.

(14) Thereby, the floater 30 can freely float on the water through the separate design of the floater 30 and the stone dumping vessel 200, so that the floater is not disturbed by the six-dimensional motion of the stone dumping vessel 200. The floater 30 is directly positioned by the positioning device 40 of the floater 30, and the surge compensator is able to correct the measurement error of the depth sounder to instantly display the stone dumping result by a 3D mode. This greatly improves the accuracy and precision of the stone real time measuring system.

(15) Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.