JP2001083007A - Vibration-analyzing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system for appropriately measuring, for analyzing the vibration of a propulsion wing, which for example, occurs during an actual operation. SOLUTION: A data acquisition/accumulation part 10, where the vibration data for a fitted part is actually measured and stored, a remote control part 20 which remote-controls the data acquisition timing of the data acquisition/ accumulation part, and a data analyzing part 30, where the data accumulated in the data acquisition/accumulation part is inputted for vibration analysis, are provided. Here, the remote control part 20 uses a magnetic signal to remote- control the data acquisition/accumulation part 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration analysis system for measuring the vibration of each part of a measured object during movement (during actual operation) and analyzing the vibration of the measured object.

[0002]

2. Description of the Related Art For example, the propulsion wings of a ship do not receive a constant external pressure during rotational movement in water, which causes vibration and noise. Therefore, in designing the propulsion wing, it is necessary to take the vibration characteristics into consideration so that vibration is not generated as much as possible. However, conventionally, no analysis has been performed using actually measured data such as how the vibration characteristics are actually changed during rotation in water, for example, how the vibration characteristics are different due to a difference in rotation speed or pitch angle. This is because there was no device or system capable of appropriately measuring the vibration of each part of the propulsion wing during the rotational motion.

[0003]

As described above, conventionally, there is no apparatus or system capable of appropriately measuring the vibration of each part of the object to be measured in motion and analyzing the vibration of the object to be measured. Conventionally, vibration analysis and the like have to be performed using data that can be acquired in a stationary state, and therefore, there has been a problem that it is difficult to sufficiently remove noise generated during rotational movement.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and a vibration analysis system for appropriately measuring the vibration of each part of a measured object during movement and analyzing the vibration during movement of the measured object. It is intended to provide.

[0005]

A vibration analysis system according to the present invention remotely controls a data acquisition / accumulation section for acquiring and accumulating vibration data of an attached portion, and a data acquisition timing of the data acquisition / accumulation section. A remote control unit, and a data analysis unit for inputting data accumulated in the data acquisition / accumulation unit and performing vibration analysis, attaching the data acquisition / accumulation unit to a stationary measurement object, and Exercise, operate the remote control unit in the previous period to acquire and store the actual measurement data in the data acquisition / storage unit, remove the data acquisition / storage unit from the measured object, connect the data analysis unit, A system for inputting the accumulated measured data to the data analysis unit and analyzing the vibration of the measured object is provided.

A plurality of data acquisition / accumulation units for acquiring and accumulating vibration data of an attached portion; a remote control unit for simultaneously remotely controlling data acquisition timings of the plurality of data acquisition / accumulation units; A data analysis unit that inputs each data stored in the plurality of data acquisition / storage units and performs comprehensive vibration analysis, and attaches the plurality of data acquisition / storage units to each unit of a stationary measurement object; Move the object to be measured, operate the remote control unit, synchronize the plurality of data acquisition / accumulation units, acquire and accumulate actual measurement data, and acquire / accumulate the plurality of data from the object to be measured. The system is removed and connected to the data analysis unit in order, and the accumulated actual measurement data is sequentially input to the data analysis unit to perform a comprehensive vibration analysis of the measured object. With the above-described configuration of the vibration analysis system of the present invention, it is possible to construct a system capable of actually measuring the vibration of each part of the measured object in actual operation and performing the vibration analysis.

Further, the remote control unit remotely controls the data acquisition / storage unit using a magnetic signal. Therefore, it is possible to construct an optimal system for vibration analysis of a hydrofoil formed of a non-magnetic material.

[0008] The data acquisition / accumulation unit includes at least an acceleration sensor for measuring a vibration at a location where the device is attached, a storage unit for storing the measured data, and a data analysis unit for storing the data stored in the storage unit. A magnetic sensor for receiving a magnetic signal from the remote control unit, a control circuit for controlling the whole, and a battery as an operation power supply. With such a configuration, vibration data can be measured and stored without connecting a control line or a power supply line.

Further, the data acquisition / accumulation section and the remote control section have a waterproof structure. This is because consideration has been given to performing vibration analysis of a non-measuring body that operates in water, such as a propulsion wing.

Further, a piezoelectric element is used for the acceleration sensor, and a flash memory is used for the data storage means.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram for explaining the entire system of the present invention. In FIG. 1, reference numeral 1 denotes a ship, 2 denotes a water surface, and 3 denotes a propulsion wing below the water surface. Also, 10
Is a data acquisition / accumulation unit attached to the propulsion wing 3 and has a function of acquiring and accumulating vibration data at the location where the data is attached. In general, the object to be measured (in this embodiment, the propulsion wing 3 ) Are attached at a plurality of locations. Reference numeral 20 denotes a remote control unit for synchronizing the data acquisition timings of the plurality of data acquisition / storage units 10, and a magnetic signal (a code signal using an alternating magnetic field) is used for the remote control as described later. Reference numeral 30 denotes a data analysis unit which inputs each data stored in the plurality of data acquisition / storage units 10 and performs a comprehensive vibration analysis of the measured object from these data, such as a personal computer or the like equipped with dedicated software. It is composed of

As shown in FIG. 1, the vibration analysis system of the present invention includes a data acquisition / accumulation unit 10, a remote control unit 20,
For example, in the case where the vibration of each part of the propulsion wing 3 of the marine vessel 1 is actually measured to perform a comprehensive vibration analysis of the propulsion wing 3, as shown in FIG. 3
A data acquisition / accumulation unit 10 is attached to each unit where vibration of the object is to be measured.

FIG. 2 is a block diagram showing a configuration example of the data acquisition / accumulation unit 10. In FIG. 2, reference numeral 101 denotes an acceleration sensor which is generally formed of a piezoelectric vibrator and outputs a voltage proportional to the received acceleration; 102, a sensor amplifier for amplifying an output signal from the acceleration sensor 101; 103, an analog voltage signal from the sensor amplifier 102 Is an A / D converter that converts digital data into digital data. 104 is a remote control unit 2
A magnetic sensor 105 for receiving a magnetic signal from 0; a sensor amplifier 105 for amplifying an output signal of the magnetic sensor 104;
Reference numeral 6 denotes a command extraction / control circuit which controls the entire data acquisition / accumulation unit and extracts and executes a command from a signal output from the sensor amplifier 105. Reference numeral 107 designates a sample timing from a signal output from the sensor amplifier 105. A sample clock extraction circuit 108 for extracting a clock signal is provided with an A / D converter 10 based on the clock timing input from the sample clock extraction circuit 107.
A data writing circuit 11 for writing the data sampled and output at 3 into the flash memory 109 in accordance with the command output from the command extraction / control circuit 106;
0 denotes a serial port for connecting the data analysis unit 30 to the flash memory 109, and 111 denotes a battery as an operation power supply. It should be noted that the data acquisition / accumulation unit 10 has a structure housed in a normally waterproof housing.

The data acquisition / accumulation unit 10 is attached to each part of the propulsion wing 3 as shown in FIG. 1, for example, and rotates the propulsion wing 3 so that the vibration data of each part during the rotational movement is obtained by the acceleration sensor 1.
01, so that even if the data acquisition / accumulation unit 10 is attached, the rotational motion of the propulsion wing 3 does not change, that is, the flow of water in contact with the wing does not change. The outer shape is as thin as possible,
Further, it is necessary that the shape conforms to the shape (curve) of the wing (not shown). In addition, because of the structure in which the vibration of the part directly attached by using the acceleration sensor is acquired, a method of directly attaching to the object to be measured by using an adhesive or the like is used for attachment to the object to be measured.

Since the data acquisition / storage unit 10 must be directly attached to the moving object to be measured, it is not possible to connect a control line or a power line. Therefore, the battery 111 is used as an operating power supply, but a battery of a minimum size necessary for one measurement is used (not shown) in order to reduce the size and weight of the entire data acquisition / storage unit 10 (not shown). It is designed to be replaced every measurement. Data acquisition / storage unit 1
As described above, a control line cannot be connected to 0, but if the plurality of data acquisition / storage units 10 cannot acquire data in synchronization, comprehensive vibration analysis of the measured object cannot be performed. Therefore, a remote control unit that can simultaneously control the plurality of data acquisition / storage units 10 from a remote place is required.

As a remote control means of this type of apparatus, the medium is generally considered to be radio waves, sound waves, light, or the like, but when the object to be measured is, for example, the propulsion wing 3 or the like, each part during rotation in water is used. Since it is necessary to actually measure the vibration, no radio wave can be used, and the sound wave is not preferable because the noise is too large. When using light, data acquisition /
Considering the case where the storage unit 10 is provided, the control becomes difficult. Therefore, in the vibration analysis system of the present invention,
Focusing on the fact that the material of the propulsion wing 3 is mainly a non-magnetic material, a magnetic signal is used for a remote control medium.
In consideration of various types of objects to be measured, a hybrid structure such as a radio signal and a magnetic signal may be used.

FIG. 3 is a block diagram showing a configuration example of the remote control unit 20. As shown in FIG. 3, the remote control unit 20 turns on a command input unit 201 including a keyboard and the like, and various signals, for example, a main power supply of the data acquisition / accumulation unit 10 according to a command input from the command input unit 201.
A signal generator 202 for generating a signal for turning on / off and a clock signal for defining sample timing, and a magnetic signal generator 204 for outputting a signal output from the signal generator 202.
Cable 203 for transmission to the transmission cable 203
And a magnetic signal generating unit 204 that converts an electric signal sent from the controller into a magnetic signal. Note that the magnetic signal generation unit 204 usually has a waterproof structure.

Next, the operation will be described. The vibration analysis system according to the present invention relates to a vibration analysis system for actually measuring the vibration of each part of a measured object in motion and analyzing the vibration of the measured object. In the case of 3, a plurality of data acquisition / accumulation units 10 are attached to each part of the propulsion wing 3 which is stopped first. The attachment of the data acquisition / accumulation unit 10 uses a method of attaching the data acquisition / accumulation unit 10 to the propulsion wing with an adhesive. The attached data acquisition / accumulation unit 10 is in a so-called standby state in which only the magnetic sensor 104 and the sensor amplifier 105 are operating. When a magnetic signal is detected by the magnetic sensor 104, the main power is turned on. It is configured to:

After the data acquisition / accumulation unit 10 is attached to each part of the wing, the remote control unit 20 is located near the propulsion wing 3.
Is attached. When the attachment of the magnetic signal generation unit 204 is completed, the propulsion wing 3 is put into operation, and then the command input unit 201 of the remote control unit 20 is operated to turn on the main power supply of each data acquisition / accumulation unit 10. The acceleration sensor 1 is operated by operating the command input unit 201 and synchronizing the data acquisition / storage units 10 all at once.
01 is measured and stored in the flash memory 109. Then, when the data accumulation is completed, the propulsion wing 3 is stopped, and each data acquisition / accumulation unit 10 is collected. As shown in FIG. Each of the measured data is converted into a data
To perform a comprehensive vibration analysis of the propulsion wing 3. That is, software dedicated to vibration analysis is installed in the data analysis unit 30. By inputting each actual measurement data, the data analysis unit 3 based on the actual measurement data of each unit is provided.
At 0, comprehensive vibration analysis of the propulsion wing 3 can be performed.

As described above, in the vibration analysis system of the present invention, the data acquisition / storage unit 10 having a built-in operation power supply and being remotely controlled is directly attached to the object to be measured. It is possible. The data acquisition / accumulation unit 10 and the remote control unit 20 have a waterproof structure,
Since a magnetic signal is used for remote control, a system suitable for measurement of an object to be measured that rotates in water, such as a propulsion wing, can be provided. In addition, since the plurality of data acquisition / storage units 10 are simultaneously controlled by a command from the remote control unit 20, it is possible to acquire synchronized data in a desired mode at a desired time.

In the above-described embodiment, the object to be measured is described as the propulsion wing. Needless to say. In this case, it is necessary to switch the medium used for remote control to a radio signal or the like as needed.

[0022]

As described above, the vibration analysis system of the present invention has an effect that the vibration of the measured object can be analyzed by appropriately measuring the vibration of each part of the measured object during the movement. In particular, since the data acquisition / accumulation unit and the remote control unit have a waterproof structure and a magnetic signal is used for remote control, a system suitable for vibration analysis of the propulsion wing during operation can be configured.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining an entire vibration analysis system of the present invention.

FIG. 2 is a block diagram illustrating a configuration example of a data acquisition / accumulation unit illustrated in FIG.

FIG. 3 is a block diagram illustrating a configuration example of a remote control device illustrated in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ship 2 Water surface 3 Propulsion wing 10 Data acquisition / accumulation unit 20 Remote control unit 30 Data analysis unit 101 Acceleration sensor 102 Sensor amplifier 103 A / D converter 104 Magnetic sensor 105 Sensor amplifier 106 Command extraction / control circuit 107 Sample clock extraction circuit 108 Data writing circuit 109 Flash memory 110 Serial port 111 Battery 201 Command input unit 202 Signal generation unit 203 Transmission cable 204 Magnetic signal generation unit

Continuation of the front page (72) Inventor Minehiro Katayama 781 Shinyoshida-cho, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture FRC terminology in JR RC Corporation (reference) 2G064 AA14 AB01 AB02 AB15 AB29 BA02 BD18 CC13 CC46 DD19 DD29

Claims (6)

[Claims] 1. A vibration analysis system for performing vibration analysis of an object to be measured in operation, a data acquisition / accumulation unit for actually measuring and accumulating vibration data of an attached portion, and a data acquisition timing of the data acquisition / accumulation unit. A remote control unit that remotely controls the data acquisition unit; and a data analysis unit that performs vibration analysis by inputting data stored in the data acquisition / storage unit. The data acquisition / storage unit is attached to a stationary measurement object, The measured object is actually operated, the remote control unit is operated, the measured data is acquired and accumulated in the data acquisition / accumulation unit, and the data acquisition / accumulation unit is removed from the measured object and the data analysis unit is removed. And a vibration analysis system for inputting the stored actual measurement data to the data analysis unit and analyzing the vibration of the measured object during operation. 2. A vibration analysis system for performing vibration analysis of an object to be measured in operation, a plurality of data acquisition / accumulation units for actually measuring and accumulating vibration data of an attached part, and the plurality of data acquisition / accumulation units. A remote control unit that remotely controls the data acquisition timing of the plurality of data at once; and a data analysis unit that inputs each data stored in the plurality of data acquisition / storage units and performs comprehensive vibration analysis. Attach the plurality of data acquisition / accumulation units to each part of the measurement object, operate the object to be measured, operate the remote control unit, synchronize the plurality of data acquisition / accumulation units, and acquire actual measurement data. The plurality of data acquisition / accumulation units are removed from the object to be measured and connected to the data analysis unit in sequence, and each of the actually measured data that has been accumulated is sequentially input to the data analysis unit. Vibration analysis system and performs vibration analysis during production of the measurement object. 3. The vibration analysis system according to claim 1, wherein the remote control uses a magnetic signal to acquire the data.
A vibration analysis system characterized by remotely controlling a storage unit. 4. The vibration analysis system according to claim 1, wherein the data acquisition / accumulation unit stores at least an acceleration sensor that measures a vibration of an attached place and the measured data. Storage means, an output port for outputting data stored in the storage means to the data analysis section, a magnetic sensor for receiving a magnetic signal from the remote control section, a control circuit for controlling the whole, and operation A vibration analysis system comprising a battery serving as a power supply. 5. The vibration analysis system according to claim 4, wherein the data acquisition / accumulation unit and the remote control unit have a waterproof structure. 6. The vibration analysis system according to claim 4, wherein a piezoelectric element is used for said acceleration sensor, and a flash memory is used for said data storage means.