JPH0528938U - Vibration measurement equipment for construction work - Google Patents

Abstract

(57) [Summary] [Purpose] Detect the vibration generated during construction work and analyze the effect on existing structures. [Structure] A vibration sensor unit, an amplification unit, and a data acquisition unit, and the data acquired by the data acquisition unit is processed online or offline by an electronic computer. The amplification unit and the data acquisition unit are provided in the same housing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vibration measuring device for detecting vibration generated during construction work and analyzing the influence on existing structures and the like.

[0002]

[Prior Art]

 Construction work involves blasting vibrations associated with rock excavation and vibrations associated with construction machinery such as pile drivers and breakers. The surrounding environment and existing structures are greatly affected by these vibrations. In recent years, it has become indispensable for construction work to fully understand and manage the effects of the above vibrations.

[0003]

[Problems to be solved by the device]

 When measuring this vibration, a simple pollution vibrometer is normally used, but this kind of vibrometer is displayed by the vibration level that is vibration-corrected for the sensation of the human body. Since the vibration characteristics such as frequency and duration could not be fully grasped, it was not sufficiently satisfactory as a material for examining the effects on the surrounding environment and existing structures. Furthermore, in order to measure the vibration waveform accurately, the vibration sensor section, the amplifier, etc. are configured as individual items, and these are combined and measured, which is difficult to handle, and the measurement results can be grasped. There were many problems such as the delay of the.

[0004]

[Means for Solving the Problems]

 The vibration measuring device of the present invention has been devised to solve the above-mentioned problems, and it is a piezoelectric sensor or a piezoelectric sensor for detecting the vibration of two horizontal components and one vertical component and converting it into an electric signal. A vibration sensor unit consisting of a moving coil type speedometer, an amplification unit for amplifying the electric signal to a predetermined input signal via a charge amplifier, an AD converter for converting the input signal into a digital signal, and a CPU for the digital signal. And a data acquisition unit for digitally displaying the maximum vibration value, which is stored in a floppy disk via a memory, and the vibration sensor unit, the amplification unit, the AD converter, and the data acquisition unit are provided in the same housing. The signal from the data acquisition unit is input to the data processing unit whose trigger level is set to a constant value online or offline and processed. It is characterized in being.

[0005]

[Action]

 In the vibration measuring device configured as described above, vibration measurement and data processing are performed by a consistent system, and sufficient vibration control can be achieved. Moreover, by providing the vibration sensor unit, the amplification unit and the data acquisition unit in the same housing, the handling is extremely simple.

[0006]

【Example】

 Hereinafter, the vibration measuring device for construction work according to the present invention will be described in detail. As shown in FIG. 1, this vibration measuring apparatus comprises a vibration sensor unit 1, an amplification unit 2, a data acquisition unit 3 and a data processing unit 4. Further, a control section 5 for controlling the amplification section 2 and the data acquisition section 3 is provided. The vibration sensor unit 1, the amplification unit 2, and the data acquisition unit 3 are provided in the same housing and are provided for easy transportation.

Next, the vibration measuring device having the above-described configuration will be described separately for one measuring point portable type and for multiple measuring point types according to its use. FIG. 2 shows a vibration measuring device A for carrying one measuring point. This vibration measuring device A is intended for mobile measuring points, and a vibration sensor unit 1, an amplification unit 2, a data acquisition unit 3, and a power supply unit v thereof are provided in the same housing a. The vibration sensor unit 1 is formed by each sensor that detects two horizontal components of X and Y and one vertical component of Z. Although the vibration sensor unit 1 is a piezoelectric type sensor for acceleration, it can be converted to a moving coil type speedometer.

An electric signal is converted into an appropriate input signal by the amplifier 2 from each of the vibration sensors via the charge amplifier, and is further converted into a digital signal by the AD converter. The converted digital signal is recorded on the Proppy disk through the memory by the CPU provided in the data capturing section 3 and the maximum vibration value is digitally displayed on the display section.

On the other hand, the data processing unit 4 is mainly composed of an electronic computer, and inputs the data written in the floppy disk by what is called offline. Although the data acquisition unit 3 sets the acquisition time to about 5 seconds, the extension and expansion can be set arbitrarily.

Since the data processing unit 4 is provided with a display, a floppy disk, a keyboard, a printer, etc., the operation is simple with the key operation as the main operation. Set, trigger level set, floppy format, file recall, etc.

In particular, in setting the trigger level, if the level is set to a certain fixed position, a so-called auto-trigger is used, and when vibration is further generated, measurement and data acquisition are automatically performed. With the above set, it is not necessary to have the operator permanently stationed.

The vibration measuring device A having the above structure has the following features. B) It is possible to perform measurement and data processing with a consistent system. B) Auto-trigger allows automatic measurement. C) As shown in FIG. 3, it has a wide frequency characteristic and can be applied to various vibration measurements. D) A vibrometer, an amplifier, and a data acquisition unit are provided in one housing, which is convenient for mobile measurement. E) The main operation is a simple keyboard, so measurement and processing operations can be performed without the need for a specialist.

Next, a stationary vibration measuring device B having multiple measuring points will be described. This device B is basically the same as the vibration measuring device A, but is intended for vibration control at multiple measuring points. As shown in FIG. 4, the vibration sensor unit 1 is installed at each measurement point, and an electric signal is collectively input to the amplification unit 2.

A filter 21 for recording only necessary vibration is installed in the amplification section 2, and an input signal from this filter 21 is converted into a digital signal by an AD converter in the data acquisition section 3. To be done. Then, this digital signal is input to the computer of the data processing section 4 through the memory and written and recorded on the floppy disk. The difference from the portable vibration measuring apparatus A is that all the data acquisition and control are calculated by an electronic computer connected to the amplification unit 2 and the data processing is performed online.

The vibration sensor unit 1 performs the three components of XYZ at five measuring points, but it is possible to measure up to 20 measuring points by adding a sensor and an amplifying unit. The vibration measuring device B having the above-described configuration has substantially the same characteristics as the above-described vibration measuring device A except that the vibration sensor unit and the amplifying unit are not provided in the same housing.

Next, the data acquisition unit 3 and the data processing unit 4 of the vibration measuring devices A and B will be described in more detail. FIG. 5 is a flow chart of data acquisition and data processing. The sampling time for data acquisition is approximately 1 mmsec. Also, the contents to be captured are the date and time, blast specifications, maximum vibration value and waveform.

In the above-mentioned one-station portable vibration measuring apparatus A, all of them are written in the data floppy, while in the multi-station stationary type, the waveform is stored in the data floppy and the others are stored in the system floppy. Write. As data processing, in addition to reading the maximum amplitude for each measurement component, waveform display (selecting station name only for device B) is performed as shown in Figs. 6 and 7, and the valid data range is specified and time axis And change the frequency. Also, the result is displayed as a sheet as shown in FIG.

Further, regarding the analysis result and the like, the waveform analysis such as the Fourier analysis and the management graph can be easily performed by creating the program such as the calculation. As described above, this vibration measuring device can be used for vibration control of existing structures, impact on slopes, evaluation, etc. associated with nuclear power plant expansion work.

[0019]

[Effect of the device]

 As described above, by using this vibration measuring device, it is possible to numerically and objectively understand the influence of the vibration caused by the construction work on the surrounding environment and existing structures, and to quickly perform the prevention management. It is extremely effective in terms of pollution prevention. In addition, it is extremely easy to carry around, and it is possible to prevent pollution due to vibration even in small-scale construction work.

[Brief description of drawings]

FIG. 1 is a diagram showing a basic configuration of the present vibration measuring device.

FIG. 2 is a block diagram illustrating an embodiment of the present vibration measuring device.

FIG. 3 is a diagram showing frequency characteristics of the present vibration measuring device.

FIG. 4 is a block tire gram diagram showing another embodiment.

FIG. 5 is a flowchart illustrating a data approach process.

FIG. 6 is a diagram showing an example of waveform display in the present vibration measuring device.

FIG. 7 is a diagram showing another waveform display example.

FIG. 8 is a diagram showing an example of a result sheet obtained by the present vibration measuring device.

[Explanation of symbols]

 1 Vibration Sensor Section 2 Amplification Section 3 Data Acquisition Section 4 Data Processing Section A, B Vibration Measurement Device for Construction Work a Housing

Claims (1)

[Scope of utility model registration request] 1. A vibration sensor unit composed of a piezoelectric sensor or a moving coil type speedometer for detecting vibrations of two horizontal components and one vertical component and converting them into an electric signal, and the electric signal via a charge amplifier. To an input signal, an AD converter for converting the input signal into a digital signal, and a data acquisition unit for storing the digital signal in a floppy disk via a memory by the CPU and digitally displaying the maximum vibration value. The vibration sensor unit, the amplification unit, the AD converter, and the data acquisition unit are provided in the same housing, and the signal from the data acquisition unit is triggered by an online or offline trigger level. A vibration measuring apparatus for construction, wherein the vibration measuring apparatus is inputted and processed in a data processing unit in which is set to a constant value.