JPS6117076A - Sailing sensor discrimination system - Google Patents

Abstract

PURPOSE:To measure magnetism of a moving object accurately, by equipping a moving object to be measured with a coil for generating a magnetic pulse to detect a specific measuring sensor through which the coil-located part of the object being measured sail from pulse outputs of measuring sensors. CONSTITUTION:When a ship 5 to be measured is equipped with magnetic field generating coils as illustrated, a coil 1A for discrminating the bow position is placed at the bow while a coil 1B for discriminating the stern position at the stern. Measuring sensors 2A-2J are arranged linearly below the ship 5 being measured in the direction the ship 5 crosses. The coils 1A and 1B are vertical in the plane and the measuring sensors 2A-2J are set vertical in the direction of the measuring axis. Then, outputs of the measuring sensors 2A-2J are applied to a recorder separately.

Description

[Detailed description of the invention] (Industrial application field).

The present invention generates magnetic pulses from a coil on the side of a moving object to be measured, such as a ship's hull, and uses the pulse waveforms that are important for each measurement waveform of the measurement, measurement, and The present invention is for accurately determining the relative position with an object, and relates to a passing sensor discrimination method for detecting a specific measuring sensor over which the part of the moving object to be measured, in which the coil is located, has passed.

(Conventional technique IFJ) When measuring the magnetism of an object, the attenuation of the magnetic field due to distance from the object is greater than other physical phenomena, so it is necessary to accurately grasp the relative position of the object and the measurement sensor. No. For example, when measuring ships sailing or moored on the sea or magnetism, it is difficult to confirm and maintain their mutual positions because the ships are affected by wind, waves, currents, etc. difficult.

(Problems to be Solved by the Invention) For this reason, a positioning machine that applies radio waves and optics is used, but due to measurement conditions and location conditions, it may not be possible to accurately measure and determine mutual positions.

(Measures to solve the R return point!!i) In order to compensate for this drawback, the present invention applies the magnetic field distribution around the coil, which is the magnetic field generation source, and the magnetic field waveform determined by the measurement axis direction of the measurement sensor. By equipping the moving object to be measured with a coil that generates magnetic pulses, and detecting a specific measurement sensor over which the part of the moving object to be measured, where the coil is located, has traveled, based on the pulse output of the measurement sensor group, individual It is an object of the present invention to provide a navigation sensor discrimination method that enables accurate determination of the mutual positions of a measurement sensor and a moving object to be measured, and in turn, allows accurate magnetic measurement of the moving object to be measured.

(Operation) First, the principle operation of the present invention will be explained with reference to Fig. 1, taking as an example a case where a magnetic field generating coil with its coil surface held perpendicularly is placed on a group of measurement sensors capable of measuring vertical magnetic field components. Take it and do it. Switch this coil 1 to DC power supply E
When connected via W and a direct current I is applied, the magnetic field H generated from the loop coil 1 is as shown in Fig. 1, and there is only a horizontal component Accordingly, the magnetic field distribution becomes such that the vertical component Y increases. Therefore, when measuring the magnetic field with each of the measurement sensors 2A to 2J, the measurement sensor 2E directly below the center of the coil surface
In this case, the magnetic field is not detected (because the direction of the measurement axis of the measurement sensor indicated by the arrow S in the figure and the direction of the magnetic field are perpendicular to each other), but the magnetic field is detected in the other measurement sensors.

This coil 1 is installed on the moving object to be measured, but the magnetic field generated from the coil 1 is superimposed on the magnetic field due to the magnetism of the moving object to be measured and affects the measurement sensors 2A to 2J. If the short magnetic pulse is outside the data frequency range, it can be separated from the measured data. Further, the number of turns of the coil 1 and the current I are selected in order to match the magnitude of the magnetic pulse to the magnitude of the measurement data. In FIG. 1, numeral 3 indicates a recorder connected to each of the measurement sensors 2A to 2J, and 4 indicates a pulse appearing on the recording paper output from the recorder 3, respectively. In this case, it can be seen that the sensor 2E, in which pulse 4 does not appear on the recording paper, is the sensor directly below the coil.

Similarly, if a magnetic field generating coil with a horizontal coil surface is placed directly above a measurement sensor whose measurement axis is horizontal, no magnetic field will be detected by the measurement sensor directly below the center of the coil surface. By selecting the coil surface according to the measurement axis direction of the measurement sensor 4- in this way, it becomes possible to determine the measurement sensor directly below the coil.

(Example) Hereinafter, an example of the navigation sensor discrimination method according to the present invention will be described with reference to the drawings.゛Figure 2 shows a case where magnetic field generating coils are installed on the vessel 5 to be measured.The bow position determination coil IA is placed at the bow of the ship, and the stern position determination coil IB is placed at the stern. There is. Measurement sensors 2A to 2J are located below the ship 5 to be measured.
are arranged in a straight line in the direction that crosses the Here, the coil surfaces of the coils IA and IB form vertical surfaces, and the measurement axis directions of the measurement sensors 2A to ff12J are also set vertically. Incidentally, as shown in FIG. 1, the outputs of the ε measurement sensors 2A to 2J are respectively given to the recorder 3.

Figure 3 shows an example of data obtained using the same configuration as shown in Figure 2.Since the ship 5 is drifting sideways due to wind and waves, the bow is on No. 5 sensor 1, the stern is on No. 8 sensor. It is clear that you have passed through.

In other words, at the bow, the pulse waveforms caused by the pulse magnetic fields of No. 4 and No. 6 are reversed, and no pulse waveform appears at No. 5, so the No. 5 sensor is determined to be the navigation sensor, and at the stern, the pulse waveform is reversed. , No, 7 and N
The pulse waveform due to the pulsed magnetic field of No. 9 is reversed, and No.
At No. 8, a pulse waveform appears, and it is determined that sensors No. 1 to No. 8 of Locusts are navigation sensors. Therefore, by data complementation, the ship 5 as a moving object to be measured
This means that the exact magnetic field distribution can be determined.

(Effects of the Invention) As explained above, according to the navigation sensor discrimination method according to the present invention, the moving object to be measured is equipped with a filter that generates magnetic pulses, and the pulse output of the measurement sensor group is used to detect the coil. By detecting a particular measuring sensor over which the portion of the moving object to be measured has passed, the relative position of the individual measuring sensor and the moving object to be measured can be precisely determined. Accordingly, the magnetic field of the moving object to be measured can be accurately measured.

[Brief explanation of drawings]

FIG. 1 is a diagram explaining the principle of the navigation sensor discrimination method of the present invention.
FIG. 2 is a perspective view showing an embodiment of the present invention, and FIG. 3 is a waveform diagram showing an example of data obtained by the configuration of the embodiment. 1, I A, I B...Coil, 2A to 2J...
・Measurement sensor/cer, 3...I record 1t, 4...Pulse.

Claims (2)

[Claims] (1) When measuring or detecting magnetism attached to a moving object to be measured, such as a ship's hull, by using a group of measurement sensors, to accurately grasp the relative position of the group of measurement sensors and the moving object to be measured. The moving object to be measured is equipped with a coil that generates magnetic pulses, and a specific measurement sensor over which the part of the moving object to be measured in which the coil is located is detected from the pulse output of the measurement sensor group. Characteristic navigation sensor discrimination method. (2) The navigation sensor determination method according to claim 1, wherein the surface of the coil is set parallel to the measurement direction (2) of the measurement sensor.