JPH09318397A - Method and device for recording data of impulse vibration waveform - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the method and the device for recording the data of impulse vibration waveform, which are useful when the data of the impulse vibration waveform for a long time are recorded by using an IC memory card, and to provide the above dercibed method and device, which can perform the simultaneous measurement and recording at a plurality of measuring points of a structure rationally at the same time. SOLUTION: This device continuously detects impulse vibrations as the data of the vibrating waveform with a plurality of sensors 1 arranged at a plurality of measuring points and temperaturily stores the vibration-waveform data, which are continuously detected in these sensors 1 alternately in a plurality of buffer memory parts 5 and 6 in time series. Then, at every time the amount of tempoary memories in the respective buffer memory parts 5 and 6 reach the specified amount, these temporary memory data are alternately transferred into a memory card 8, recorded in time series and maintained by themselves.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock vibration waveform data recording method and apparatus for time-sequentially recording shock vibration in a structure such as a building or industrial equipment or shock vibration generated during transportation.

[0002]

2. Description of the Related Art When knowing the average value and the total amount of impact vibrations that are constantly applied to the above structures and analyzing the damage received by the structures due to the addition of vibration for a long time, It is necessary to record all of the vibration waveform data that is regularly added in time series.

[0003]

Conventionally, a method of using a magnetic tape as a recording medium has been considered as a data recorder for coping with the problem, but at present, it is possible to record for about 2 hours on one tape, for example, for a long distance. In order to record the vibration waveform data for a long time in all the processes of transportation, it is necessary to manually replace the tape frequently, and there is a problem of a recording defect at the time of replacement.

Further, there are problems such as alteration of waveform data due to wow and flutter due to tape extension and vibration, and lack of accuracy in time series recording.

Particularly, in the tape recording system, there is a drawback that it is necessary to rotate the tape for a long time and reproduce it in order to input the recorded data to another analysis computer. Also, as represented by Japanese Patent Publication No. 60-54626, a method is known in which only the vibration waveform data exceeding the threshold value in the vibration waveform data detected by the sensor is stored in the SRAM. Moreover, due to the limitation of the storage capacity, it is not possible to cope with time-series recording of continuous waveform data for a long time, and this storage data lacks portability.

Further, for example, in order to grasp the mode of vibration propagation in a structure, a plurality of recording devices such as the above Japanese Patent Publication No. 60-54626 must be installed at a plurality of measuring points, so that proper synchronization between the devices can be achieved. Therefore, it is difficult to properly deal with the measurement system that accurately grasps the transfer function and the like from the vibration propagation mode.

[0007]

SUMMARY OF THE INVENTION The present invention provides a shock vibration waveform data recording method and apparatus which appropriately meet the above-mentioned problems.

As a method thereof, vibration waveform data continuously detected by one or a plurality of sensors installed at a plurality of side fixed points are alternately stored temporarily in a plurality of buffer memory sections in a time series, A shock vibration waveform data recording method is adopted in which each temporary storage data is alternately transferred to a memory card and recorded in time series and self-held each time the temporary storage amount of each buffer memory unit reaches a fixed amount.

This shock-vibration waveform data recording apparatus is provided with a plurality of sensors placed at a plurality of measurement points for continuously detecting the shock vibration as vibration waveform data, and further, the sensors are continuously detected. A plurality of amplifiers for amplifying the vibration waveform data for each sensor, and a plurality of A for A-D converting the amplified vibration waveform data for each sensor
-D converter.

A plurality of storage areas for temporarily storing the A-D converted vibration waveform data for each sensor in time series are provided, and a plurality of buffer memory sections for alternately performing the temporary storage operation. Each time the temporary storage amount of each buffer memory unit reaches a fixed amount, the temporary storage data is alternately transferred to the memory card, and this is recorded in a plurality of storage areas of the memory card in time series for each sensor. A shock-vibration waveform data recording device was configured to be self-holding.

Further, as the above apparatus, a plurality of sensors placed at a plurality of measuring points for continuously detecting impact vibration as vibration waveform data are provided, and the vibration waveform data continuously detected by each sensor is provided. A plurality of amplifiers for amplifying each sensor, a multiplexer that ranks the amplified vibration waveform data and outputs the ranked vibration waveform data to the A / D converter, and a plurality of the ranked vibration waveform data according to the ranking. −
The above AD converter for D conversion is provided.

Further, each sensor has a plurality of storage areas for temporarily storing the A-D converted vibration waveform data in time series, and a plurality of buffer memory sections for alternately performing the temporary storage operation. Each time the temporary storage amount of each buffer memory unit reaches a fixed amount, the temporary storage data is alternately transferred to the memory card, and this is recorded in a plurality of storage areas of the memory card in time series for each sensor. A shock-vibration waveform data recording device was configured to be self-holding.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 1, a sensor 1 such as an acceleration sensor continuously detects impact vibration in a structure or the like as vibration waveform data. The vibration waveform data (analog signal) is amplified by the amplifier 2, the amplified vibration waveform data is converted into a digital signal by the AD converter 3, and is temporarily stored in the buffer memory via the CPU 4 in time series. Remember it.

The buffer memory is composed of a plurality of memory units, for example, a primary buffer memory unit 5 and a secondary buffer memory unit 6, and the vibration waveform data continuously detected by the sensor 1 is shown in FIG. As described above, the data is temporarily stored in the primary buffer memory unit 5 in a time series according to a command from the CPU 4.
When the temporary storage amount of 1 reaches a certain amount, the vibration waveform data continuously detected by the sensor 1 is continuously stored in the secondary buffer memory unit 6 by the command of the CPU 4.
At the same time, as shown in FIGS. 4A and 4B, the unit vibration waveform data 5-1 ′ temporarily stored in the primary buffer memory unit 5 is transferred to the memory card 8 via the memory transfer interface 7 by the command of the CPU 4, Record the sequence order without breaking it.

Further, when the temporary storage amount of the secondary buffer memory unit 6 reaches a certain amount, the unit vibration waveform data 6-1 'temporarily stored in the secondary buffer memory unit 6 is transferred to the memory by the instruction of the CPU 4. The data is transferred to the memory card 8 via the interface 7, and the column after the above-mentioned already recorded vibration waveform data is 5-1'-1 in chronological order.
And 6-1'-1.

In the same manner, the storage of the vibration waveform data by the primary and secondary buffer memory units 5 and 6 and the above transfer are alternately repeated, and the unit vibration waveform data 5-1'-1 and 6-1 are stored in the memory card 8. '-1 ... 5-1'-m, 6
-1'-m is recorded in time series and self-held. Self-holding means holding the data without erasing the data even if the memory card 8 is removed from the device.

The memory card 8 is a card typified by an IC memory card. The IC memory card has a flat and rectangular card body 8a and an individual CPU 8b and an IC chip which is a recording memory element 8c. It is connected to the memory transfer interface 7 by a connector and can be inserted into and removed from the device via the connector.

The recording memory element 8c is a nonvolatile recording memory element, and the CPU 8b is an element for instructing the time-series arrangement of the nonvolatile recording memory element 8c. The timer 9 instructs the data conversion of the A / D converter 3 for each unit time as time passes, and at the same time, C
The time is output to the PU 4, and this time is stored in the primary and secondary buffer memories 5 and 6 together with the A-D converted signal at that time (vibration waveform data for each unit time).

A PC interface 10 is also provided, which is removably connected to the personal computer through the interface 10. This personal computer sets the measurement conditions of the apparatus (sample time setting by timer, amplification factor setting of amplifier, measurement). Set stop start, etc.). Ie interface 10
Is a means for connecting a personal computer for setting measurement conditions, which allows the measurement condition setting means to be omitted from the main body of the device, achieves a compact and lightweight device, and achieves the mobility required for this type of device. Increase.

By using the memory card 8 in combination with the primary buffer memory unit 5 and the secondary buffer memory unit 6, the vibration waveform data recording means for continuously recording the impact vibration waveform data for a long time can be enriched appropriately. By utilizing the characteristics of the memory card 8, this data can be carried to an arbitrary place and immediately used as data of another computer, which can contribute to labor saving and cost reduction of analysis of vibration waveform data. This effect is the same in FIGS. 2 and 3 described below.

Next, two embodiments of the present invention shown in FIGS. 2 and 3 will be described.

As shown in FIGS. 2 and 3, a plurality of sensors 1a-1 such as acceleration sensors installed at a plurality of measurement points.
n, each of the sensors 1a to 1n continuously detects the impact vibration propagating to each measurement point in a structure or the like as vibration waveform data for each measurement point. The vibration waveform data (analog signal) at each point is amplified by the amplifier 2 for each of the sensors 1a to 1n.
a to 2n, the amplified vibration waveform data for each sensor is converted into a digital signal by the AD converters 3a to 3n (FIG. 2) or 3 (FIG. 3), and the CPU 4
To be temporarily stored in the buffer memory in time series via.

2 and 3 show different embodiments of the method for A / D converting the vibration waveform data for each of the sensors 1a-1n amplified by each of the amplifiers 2a-2n. FIG. 2 shows the above vibration waveform data for each sensor 1a ...
In addition to providing a plurality of A-D converters 3a to 3n corresponding to the number of sensors and amplifiers that perform A-D conversion for each 1n,
Each vibration waveform data 1a for each sensor that has been A-D converted
1n for each sensor 1a-1n, a plurality of storage areas for temporarily storing time-sequentially, and a plurality of buffer memory sections 5 and 6 for alternately performing the temporary storage operation are provided. , 6 each time the temporary storage amount reaches a fixed amount, the respective temporary storage data are alternately transferred to the memory card 8, which is recorded in a plurality of storage areas of the memory card 8 in time series for each sensor and self-maintained. The impact vibration waveform data recording device is configured as described above.

On the other hand, FIG. 3 shows a multiplexer 11 which ranks and outputs the amplified vibration waveform data for each sensor to the A / D converter 3, and the ranked vibration waveform data for each sensor. A single A-D converter that performs A-D conversion according to the ranking is provided.

A plurality of buffer memories having a plurality of storage areas for temporarily storing the A-D converted vibration waveform data in time series for each of the sensors 1a to 1n and alternately performing the temporary storage operation. The units 5 and 6 are provided, and the temporary storage data are alternately transferred to the memory card 8 each time the temporary storage amount of each buffer memory unit reaches a fixed amount.
The shock vibration waveform data recording device is configured to record the data in a plurality of storage areas of the memory card 8 for each sensor in time series and hold them by themselves.

To restate, the vibration waveform data 1a 'for each sensor continuously detected by the above-mentioned sensors 1a-1n.
As shown in FIG. 6, 1n 'is first temporarily stored in each storage area of the primary buffer memory unit 5 in a time series according to a command from the CPU 4, and when the primary storage amount of the primary buffer memory unit 5 reaches a certain amount. , The secondary buffer memory unit 6 stores the vibration waveform data 1a ′ to 1n ′ for each sensor, which are continuously detected by the sensors 1a to 1n, in accordance with a command from the CPU 4.
Continuously store in each storage area of.

At the same time, as shown in FIGS. 5A and 5B, the unit vibration waveform data 5 for each sensor, which is temporarily stored in each storage area of the primary buffer memory unit 5 in accordance with a command from the CPU 4,
-1a 'to 5-1n' are transferred to the memory card 8 via the memory transfer interface 7, and the data 5-1 is transferred without breaking the order of the time series as shown in FIG. 5B.
Record in column 1 as a'-1 to 5-1n'-1.

Further, when the primary storage amount of the secondary buffer memory unit 6 reaches a certain amount, the unit vibration waveform data 6-1a 'to 6-' which are temporarily stored in the secondary buffer memory unit 6 according to a command from the CPU 4 are used. 1n 'is transferred to the memory card 8 via the memory transfer interface 7, and data 6-1a'-1 to 6-1n'- is chronologically displayed in the second column after the vibration waveform data already recorded. Record as 1.

Similarly, again the vibration waveform data 5-1a'-2 to 5 by the primary and secondary buffer memory units 5 and 6 are obtained.
-1n'-m and 6-1a'-2 to 6-1n'-m and the above transfer are repeated alternately, and the unit vibration waveform data 5-1a'-1 to 5 for each sensor are stored in the memory card 8. -1n'-m and 6-1a'-1 to 6-1n'-m
Is recorded in time series and self-maintained. The number at the end in FIG. 5B is the number of data transfers.

Similar to the above, the memory card 8 is, for example, an IC memory card. This card has a flat and rectangular card body 8a, an individual CPU 8b and an IC chip as a recording memory element 8c, and a memory transfer interface. It is connected to the connector 7 and can be inserted into and removed from the device via the connector.

The recording memory element 8c is a nonvolatile recording memory element, and the CPU 8b is an element for instructing the time-series arrangement of the nonvolatile recording memory element 8c. The timer 9 instructs the data conversion of the AD converter 3 or 3a to 3n in each unit time according to the passage of time, at the same time, outputs the time to the CPU 4, and the time of the A-D converted time is displayed. The signals (vibration waveform data for each unit time) are stored in the primary and secondary buffer memories 5 and 6. Further, it is equipped with a PC interface 10 and is removably connected to the personal computer through the interface 10. This personal computer sets the measurement conditions of the device (sample time setting by timer, amplification factor setting of amplifier, sensor selection, measurement). Set stop start, etc.). That is, the interface 10 functions as a means for connecting a measurement condition setting personal computer.

The sensor 1 shown in FIGS. 1, 2 and 3.
1 and 1a can be configured by any one, two, or three of the three types of detection elements that detect vibrations in the X, Y, and Z directions. The same applies to the other sensors 1b to 1n.

[0033]

As described above, the method of using an IC memory card in combination with the primary buffer memory and the secondary buffer memory is suitable as a vibration waveform data recording means for continuously recording shock vibration waveform data for a long time. At the same time, by utilizing the characteristics of the IC memory card, this data can be carried to an arbitrary place and immediately used as data of the analysis computer, which can contribute to labor saving and cost reduction of the analysis of the vibration waveform data.

Further, by arranging each sensor at a plurality of points on the structure, it is possible to reasonably perform simultaneous measurement at a plurality of measuring points with one device, and by using these data groups, the structure can be analyzed by a computer. It is possible to properly grasp the vibration propagation mode in the inside, the vibration transfer function and the correlation between the measurement points, etc., and the influence of the impact on the structure can be correctly known from these.

A common timer and CPU are used to control the amplifier and A / D converter having the above-mentioned configuration, and a plurality of shared buffer memories are used to record on a common memory card. The shock-vibration waveform data recording device capable of measuring multiple points with the above device can be provided at a low cost with a simple structure.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration of an impact vibration waveform data recording method and apparatus according to the present invention.

FIG. 2 is a block diagram showing an impact vibration waveform data recording method and apparatus capable of measuring a plurality of points according to the present invention.

FIG. 3 is a block diagram showing another modification of FIG.

FIG. 4 is an explanatory diagram showing a state in which primary storage data of the buffer memory in FIG. 1 is transferred to a memory card.

FIG. 5 is an explanatory diagram showing a state in which the temporarily stored data in the buffer memory in FIGS. 2 and 3 is transferred to a memory card.

FIG. 6 is a waveform data diagram showing a switching timing and a unit data amount between a plurality of buffer memories in FIGS. 1 to 3.

[Explanation of symbols]

 1 sensor 1a-1n sensor 2 amplifier 2a-2n amplifier 3 A-D converter 3a-3n A-D converter 4 CPU 5 primary buffer memory 6 secondary buffer memory 7 memory transfer interface 8 memory card 8a same card body 8b CPU 8c Memory element 9 Timer 10 PC interface 11 Multiplexer

Front page continuation (72) Inventor Takeshi Itoi, Yamagata Electric Co., Ltd., 3 28-7 Nakamagome, Ota-ku, Tokyo (72) Inventor, Ho Ho Ozawa, Shinsugita-cho, Isogo-ku, Yokohama, Kanagawa Prefecture Inside the Yokohama office

Claims (3)

[Claims] 1. An impact vibration is continuously detected by a sensor as vibration waveform data, and the vibration waveform data continuously detected by the sensor is temporarily stored alternately in a plurality of buffer memory units in time series. A shock vibration waveform data recording method characterized in that each time the temporary storage amount of each buffer memory unit reaches a fixed amount, each temporary storage data is alternately transferred to a memory card, recorded in time series, and self-held. . 2. A plurality of sensors placed at a plurality of measurement points for continuously detecting impact vibration as vibration waveform data; and amplifying the vibration waveform data continuously detected by each sensor for each sensor. A plurality of amplifiers; a plurality of A-D converters for A-D converting the amplified vibration waveform data for each sensor; a time series of the A-D converted vibration waveform data for each sensor And a plurality of buffer memory units that alternately perform the temporary storage operation; and each of the temporary storage data each time the temporary storage amount of each buffer memory unit reaches a fixed amount. The shock vibration waveform data recording device is characterized in that the data are alternately transferred to a memory card, and the data are recorded in a plurality of storage areas of the memory card in time series for each sensor and self-held. 3. A plurality of sensors placed at a plurality of measuring points for continuously detecting impact vibration as vibration waveform data; and amplifying vibration waveform data continuously detected by each sensor for each sensor. A plurality of amplifiers; a multiplexer that ranks each of the amplified vibration waveform data and outputs the ranked vibration waveform data to an A / D converter; and a plurality of A / D converters that rank the respective vibration waveform data according to the ranking. A plurality of storage areas for temporarily storing the A-D converted vibration waveform data for each sensor in time series,
And a plurality of buffer memory units for alternately performing the temporary storage operation; each time the temporary storage data of each buffer memory unit reaches a fixed amount, the respective temporary storage data are alternately transferred to a memory card, and this is stored in a memory. An impact vibration waveform data recording device characterized in that each sensor is recorded in time series in a plurality of storage areas of a card and self-held.