KR20130005068A

KR20130005068A - Vibration reduction system

Info

Publication number: KR20130005068A
Application number: KR1020110066422A
Authority: KR
Inventors: 서윤호; 김성훈
Original assignee: 현대중공업 주식회사
Priority date: 2011-07-05
Filing date: 2011-07-05
Publication date: 2013-01-15

Abstract

PURPOSE: A vibration reduction system is provided to accurately measure a rotation phase of the vibration reduction device by preventing noise in a pick-up sensor. CONSTITUTION: A pick-up sensor(110) generates a pick-up signal based on the number of rotations in a vibration reduction device(140). An improved comparator(410) receives a noise signal generated between the pick-up signals, and the pick-up signal. The comparator outputs the pick-up signal and the noise signal. A phase measuring instrument(120) calculates a rotation phase of the vibration reduction device by counting the number of the pick-up signal. A controller(130) controls the vibration reduction device based on the rotation phase. [Reference numerals] (110) Pick-up sensor; (120) Phase measuring instrument; (130) Controller; (140) Vibration reduction device; (410) Improved comparator

Description

Vibration Reduction System {VIBRATION REDUCTION SYSTEM}

The disclosed technique relates to a vibration reduction system, and more particularly, to a vibration reduction system in which an output signal of a comparator is improved.

Vibration reduction device refers to a device that is applied to a ship, etc. to cancel the vibration generated from the source of vibration, such as the engine or propeller. The vibration reducing device rotates an unbalanced mass of a constant weight so that a specific frequency is generated, thereby reducing the vibration generated from the vibration source and transmitted to the living quarters. Since the vibration frequency generated in the vibration reducing device must correspond to the vibration transmitted to the structure, in order to control the operating phase of the vibration reducing device, it is necessary to measure the rotational phase of the ship's main engine or the vibration reducing device.

The related art in this regard is disclosed in Korea Patent Registration 10-0182082.

The present application provides a technique for preventing the pick-up sensor noise phenomenon that can more accurately measure the rotational phase of the vessel's main engine or vibration reduction device.

Among the embodiments, the vibration reduction system may include a vibration sensor, a pickup sensor for generating a pickup signal based on a rotational speed of the main engine of the vessel or the vibration reduction device, a noise signal generated between the pickup signal, and the pickup signal. After receiving, the improved comparator for downgrading the received noise signal and outputting the pickup signal and the downlink noise signal, and counting the number of the pickup signals to calculate the rotational phase of the ship's main engine or the vibration reduction device. And a control unit for controlling the vibration reduction device based on the calculated rotational phase.

In one embodiment, the improved comparator may output the pickup signal to a value of -24V or + 24V. In one embodiment, the improved comparator can lower the noise signal down to -24V. In one embodiment, the phase meter may count signals in excess of 0V. In one embodiment, the maximum value of the noise signal may not exceed 0V.

The disclosed technique of the present application can more accurately measure the rotational phase of the ship's main engine or vibration reduction device by using an improved comparator to prevent pickup sensor noise.

1 is a flowchart showing a vibration reduction system of a ship.
2 is a view showing a signal generated by the pickup sensor.
3 is a diagram illustrating a signal output using a conventional comparator.
4 is a flow diagram illustrating a vibration reduction system in accordance with one embodiment of the disclosed technology.
5 and 6 illustrate circuit diagrams and output signals of an improved comparator in accordance with one embodiment of the disclosed technology.

Description of the present application is only an embodiment for structural or functional description, the scope of the disclosed technology should not be construed as limited by the embodiments described in the text. That is, the embodiments may be variously modified and may have various forms, and thus, the scope of the disclosed technology should be understood to include equivalents capable of realizing the technical idea.

Meanwhile, the meaning of the terms described in the present application should be understood as follows.

The terms "first "," second ", and the like are intended to distinguish one element from another, and the scope of the right should not be limited by these terms. For example, a first component may be named a second component, and similarly, a second component may also be named a first component.

It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when a component is said to be "directly connected" to another component, it should be understood that the other component does not exist. On the other hand, other expressions describing the relationship between the components, such as "between" and "immediately between" or "neighboring to" and "directly neighboring to", should be interpreted as well.

It should be understood that the singular " include "or" have "are to be construed as including a stated feature, number, step, operation, component, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. Generally, the terms defined in the dictionary used are to be interpreted as being consistent with the meaning in the context of the related art, and should not be interpreted as having ideal or excessively formal meanings unless clearly defined in the present application.

1 is a flowchart showing a vibration reduction system for ships.

Referring to FIG. 1, the vibration reduction system 100 includes a pick up sensor 110, a phase measuring instrument 120, a controller 130, and a vibration reduction device 140.

Referring to FIG. 1, the pickup sensor 110 detects the rotational speed of the ship's main engine or the vibration reduction device 140 and generates a pickup signal in the form of a taco signal. The magnitude of the generated pickup signal is output using the unit of V (volts).

The phase measurer 120 counts the number of pickup signals and calculates a rotational phase of the ship's main engine or the vibration reduction device 140.

The controller 130 receives the rotation phase data calculated by the phase measuring unit 120 and controls the rotation phase or the period of the vibration reduction device 140. The controller 130 may control the vibration reduction device 140 to calculate the difference between the rotational phase of the main engine of the ship or the vibration reduction device 140 to minimize the vibration transmitted to the deck house of the ship. .

The vibration reduction device 140 is installed on the deck house of the ship and generates vibration through the rotation of the unbalanced mass.

2 is a view showing a signal generated by the pickup sensor.

Referring to FIG. 2, the signal generated by the pickup sensor 110 includes a normal pickup signal 210 and a noise signal 220. The pickup signal 210 has a constant amplitude and period, and the noise signal 220 is irregular in amplitude and period and occurs between the pickup signals 210.

The pickup signal 210 is generated at 0V or + 24V and the noise signal 220 is generated at 0V. The phase measurer 120 counts signals output over OV, and the number of pickup signals 210 counted by the phase measurer 120 increases due to the noise signals 220. This is called a pickup sensor 110 noise phenomenon, and a comparator may be installed to prevent the pickup sensor 110 noise phenomenon.

3 is a diagram illustrating a signal output using a conventional comparator.

Referring to FIG. 3, a conventional comparator artificially raises the count limit 310. Since the phase meter 120 counts signals larger than the count limit value 310, the phase meter 120 may not count noise signals 220 having a magnitude greater than 0V and smaller than the count limit value 310.

4 is a flow diagram illustrating a vibration reduction system in accordance with one embodiment of the disclosed technology.

Referring to FIG. 4, the vibration reduction system 400 further includes an improved comparator 410 between the pickup sensor 110 and the phase gauge 120.

The improved comparator 410 receives the pickup signal 210 and the noise signal 220 from the pickup sensor 110, and then lowers the received noise signal 220 so that the pickup signal 210 and the downward noise signal ( 220). The phase measurer 120 may calculate a rotational phase by counting the pickup signal 210 based on the pickup signal 210 and the noise signal 220 output from the improved comparator 410.

Since the control unit 130 and the vibration reduction device 140 are substantially the same as those described with reference to FIG. 1, description thereof will be omitted.

5 and 6 illustrate circuit diagrams and output signals of an improved comparator in accordance with one embodiment of the disclosed technology.

In FIG. 5, the pickup signal 210 received from the pickup sensor 110 is amplified through the illustrated circuit, and the noise signal 220 is downward through the circuit. Op-Amp is used to amplify the pick-up signal 210, and the output magnitude of the pick-up signal 210 may be adjusted using Vcc (power supply voltage) of + 24V and -24V.

Referring to FIG. 6, in one embodiment, the improved comparator 410 may output the pick-up signal 610 to a value of -24V or + 24V, and may lower the noise signal 620 to -24V. . Receiving the improved pick-up signal 610 and the noise signal 620 from the improved comparator 410 phase calculator 120 calculates the phase by counting the signal exceeding 0V. Here, since the maximum value of the noise signal 620 does not exceed 0V, the phase measuring instrument 120 does not count the noise signal 620 and the actual pickup signal associated with the rotation of the ship's main engine or the vibration reduction device 140. Only 610 can be counted.

Although described above with reference to the preferred embodiment of the present application, those skilled in the art will be variously modified and changed within the scope of the present application without departing from the spirit and scope of the present application described in the claims below I can understand that you can.

100, 400: vibration reduction system
110: pick up sensor 120: phase measuring instrument
130 control unit 140 vibration reduction device
210, 610: pick up signal 220, 620: noise signal
310: count limit 410: improved comparator

Claims

Vibration reduction device;
Pick-up sensor for generating a pickup signal based on the rotational speed of the main engine of the vessel or the vibration reduction device;
An improved comparator for receiving the pick-up signal and the noise signal generated between the pick-up signals and then outputting the pick-up signal and the down-signaled noise signal by downgrading the received noise signal;
A phase measuring device for counting the number of the pick-up signals to calculate the rotational phase of the ship's main engine or the vibration reduction device; And
Vibration reduction system including a control unit for controlling the vibration reduction device based on the calculated rotation phase

The method of claim 1, wherein the improved comparator
And output the pick-up signal at a value of -24V or + 24V.

The method of claim 2, wherein the improved comparator
And lower the noise signal down to -24V.

The vibration reduction system of claim 1, wherein said phase meter counts a signal exceeding 0V.

The vibration reduction system according to claim 1, wherein the maximum value of the noise signal does not exceed 0V.