JP2005069855A - Multipoint simultaneous measuring method and its system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multipoint simultaneous measuring system capable of simultaneous measurement with a multitude of measuring apparatuses in high precision with a relatively simple configuration. <P>SOLUTION: The system placing measuring apparatuses at a plurality of locations simultaneously initiates measurement of vibration and noise sound, and comprises a microphone 3 detecting sound generated by crashing hands and outputting electric signal, and an operation processing means 7 operationally processing electric signal output by the microphone 3 and outputting the measurement initiation trigger signal to the measuring apparatuses. The operation processing means 7 is constituted of an amplifier 8, a band-pass filter 9, a level comparator 10 and a counter 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a multipoint simultaneous measurement method and apparatus for installing measurement devices such as a seismometer, a vibration meter, and a noise meter at a plurality of measurement locations and simultaneously starting measurement of vibration, noise, and the like.

  In measurements using measuring instruments such as seismometers, vibrometers, and sound level meters, multi-point simultaneous measurement is performed by installing measuring instruments at a number of measurement locations, starting measurement simultaneously with these measuring instruments, and analyzing the measurement results. Has been done. Since the simultaneous start of measurement in this multi-point simultaneous measurement directly affects the observation / analysis result, extremely high accuracy of several tens of milliseconds or less is required as variation in the measurement start time.

  Conventionally, in order to achieve such simultaneity, a method of inputting the same measurement start signal to each measurement device by wire, a clock is mounted on each measurement device, and a measurement start signal is sent to each measurement device at the same time. A method of inputting and a method of mounting a radio clock or GPS on each measuring device are known.

  However, the wired method requires connection to each measuring instrument, and it is necessary to connect a switch or a signal generator to the end of the connection, which is complicated. In addition, in the method of mounting a clock, time adjustment occurs because time adjustment of many measuring instruments is performed manually. Furthermore, in the method of mounting a radio clock or GPS, it is necessary to provide an antenna outdoors in places where radio waves do not reach such as in a structure, resulting in high cost.

  The present invention has been made in view of such problems of the prior art, and an object of the present invention is to enable simultaneous measurement by a large number of measuring instruments with a relatively simple configuration and high accuracy. An object of the present invention is to provide a multipoint simultaneous measurement method and apparatus.

In order to solve the above-mentioned problem, the invention according to claim 1 is a method of installing measuring devices at a plurality of measurement points and simultaneously starting measurement of vibration, noise, etc., comprising an electroacoustic converter or a photoelectric converter. The measuring instrument is collected in one place, and a sound signal or an optical signal of a predetermined level is radiated from a position facing the electroacoustic converter or the photoelectric converter, and an output signal of the electroacoustic converter or the photoelectric converter The measurement start trigger signal of the measuring instrument is an apparatus that installs measuring instruments at a plurality of measurement locations and simultaneously starts measurement of vibration, noise, etc., and is an acoustic signal or optical signal Sound or light radiating means for emitting light, an electroacoustic transducer or photoelectric converter for detecting an acoustic signal or optical signal emitted by the sound or light radiating means and outputting an electric signal, and the electroacoustic converter or photoelectric Converter Computation processing means is provided for computing the output electrical signal and outputting a measurement start trigger signal to the measuring device.

  As described above, according to the present invention, it is possible to perform multipoint simultaneous measurement in which a measuring device is installed at a plurality of measurement locations and measurement of vibration, noise, etc. is started simultaneously with a relatively simple configuration and high accuracy.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a perspective view of a vibrometer equipped with a multipoint simultaneous measuring apparatus according to the present invention, FIG. 2 is a block diagram of the first embodiment, FIG. 3 is a block diagram of the second embodiment, and FIG. FIG. 5 is an explanatory diagram of use, and FIG. 5 is a schematic view showing the installation state.

  As shown in FIG. 1, a vibrometer 1 provided with a multipoint simultaneous measurement apparatus according to the present invention is provided with a microphone 3 or a light receiver 4 on a front surface 2 a of a vibrometer main body 2. 5 is a vibration sensor, and 6 is a display.

  As shown in FIG. 2, the first embodiment of the multipoint simultaneous measuring apparatus mounted on the vibrometer main body 2 includes a microphone 3 as an electroacoustic transducer and an arithmetic processing means 7. The arithmetic processing means 7 includes an amplifier 8, a band pass filter 9, a level comparator 10, and a counter 11. Reference numeral 12 denotes a measurement processing unit of the vibrometer 1.

  The microphone 3 is attached to the front surface 2a of the vibrometer body 2 so that sound generated when a hand or the like is struck and sound emitted by a sound generator can be collected efficiently. The amplifier 8 amplifies the signal collected by the microphone 3 to a predetermined level.

  The band-pass filter 9 allows high-frequency components of sound generated when a hand or the like is struck or sound emitted by a sound generator to pass. The level comparator 10 compares the level reference value with the output level of the bandpass filter 9 and outputs a count start signal when the output level of the bandpass filter 9 exceeds the level reference value.

  The counter 11 starts a counter operation in response to an output signal from the level comparator 10, and outputs a measurement start trigger signal when a predetermined count value set in advance is reached. The display 6 receives the measurement start trigger signal output from the counter 11 and displays that the measurement processing unit 12 has started measurement.

  The operation of the first embodiment of the multipoint simultaneous measurement apparatus according to the present invention configured as described above and the multipoint simultaneous measurement method will be described.

  First, the necessary number of vibrometers 1 are collected in one place. At this time, the front surface 2a provided with the microphones 3 of all the vibrometers 1 is directed in a certain direction as shown in FIG.

  Next, a hand is hit from a position several meters away toward the microphones 3 of the plurality of vibrometers 1 collected in one place. Instead of clapping hands, metal members may be struck, or a sound generator 13 that emits a sound having a high frequency component may be used.

  The counter 11 starts counting simultaneously by the sound generated at this time. And each vibration meter 1 is installed in the measurement location of each floor of the building 14, as shown in FIG.

  When the counter 11 reaches a preset count value, the vibrometer 1 installed on each floor of the building 14 starts measurement by a measurement start trigger signal output from the counter 11. Note that the count value set in advance in the counter 11 may be a count value corresponding to a time during which all vibrometers 1 can be installed.

  In this way, when using sound generated by hitting a hand or the like, a highly accurate multi-point simultaneous measurement method and apparatus that does not require a dedicated tool and that allows variation in measurement start timing to be several milliseconds or less. Can be obtained.

  Next, as shown in FIG. 3, the second embodiment of the multipoint simultaneous measuring apparatus mounted on the vibrometer main body 2 includes a light receiver 4 as a photoelectric converter and an arithmetic processing means 17. The arithmetic processing means 17 includes a waveform shaper 18 and a counter 19.

  The light receiver 4 converts light emitted from the light emitter into an electrical signal. The waveform shaper 18 converts the electrical signal output from the light receiver 4 into a digital signal having a predetermined frequency. The counter 19 starts a counter operation in response to an output signal from the waveform shaper 18 and outputs a measurement start trigger signal when a predetermined count value set in advance is reached. The display 6 receives the measurement start trigger signal output from the counter 19 and displays that the measurement processing unit 12 has started measurement.

  The operation of the second embodiment of the multipoint simultaneous measurement apparatus according to the present invention configured as described above and the multipoint simultaneous measurement method will be described.

  First, the necessary number of vibrometers 1 are collected and arranged in one place. At this time, the front surface 2a provided with the light receivers 4 of all vibrometers 1 is directed in a certain direction as shown in FIG.

  Next, the light receiver 15 is operated from a position several meters away toward the light receiver 4 of the plurality of vibrometers 1 collected and arranged at one place, and the light receiver 4 is irradiated with light. At this time, the counter 19 starts counting simultaneously by the irradiated light. And each vibration meter 1 is installed in the measurement location of each floor of the building 14, as shown in FIG.

  When the counter 19 reaches a preset count value, the vibrometer 1 installed on each floor of the building 14 starts measurement by a measurement start trigger signal output from the counter 19. Note that the count value set in advance in the counter 19 may be a count value corresponding to a time during which all vibrometers 1 can be installed.

  Thus, although the light emitter 15 is required in the second embodiment, a more accurate multipoint simultaneous measurement method and apparatus can be obtained than in the first embodiment using sound.

  Simultaneous measurement in vibration / noise measurement of each floor in a high-rise building or multi-point noise measurement in a wide area can be realized with a relatively simple configuration and high accuracy.

The perspective view of the vibrometer provided with the multipoint simultaneous measuring apparatus which concerns on this invention The block diagram of 1st Example of the vibrometer provided with the multipoint simultaneous measurement apparatus which concerns on this invention The block diagram of 2nd Example of the vibrometer provided with the multipoint simultaneous measurement apparatus based on this invention Use explanatory drawing of a vibrometer equipped with a multi-point simultaneous measuring apparatus according to the present invention The schematic diagram which shows the installation state of the vibrometer provided with the multipoint simultaneous measurement apparatus which concerns on this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vibration meter, 2 ... Vibration meter main body, 2a ... Front surface of vibration meter main body, 3 ... Microphone, 4 ... Light receiver, 5 ... Vibration sensor, 6 ... Display, 7, 17 ... Arithmetic processing means, 8 ... Amplifier, 9 ... Band pass filter, 10 ... Level comparator, 11, 19 ... Counter, 13 ... Sound generator, 14 ... Building, 15 ... Light emitter, 18 ... Waveform shaper.

Claims (2)

A method of installing measurement devices at a plurality of measurement locations and simultaneously starting measurement of vibration, noise, etc., and collecting the measurement devices provided with electroacoustic transducers or photoelectric transducers at one location, and A sound signal or an optical signal of a predetermined level is radiated from a position facing the converter or the photoelectric converter, and an output signal of the electroacoustic converter or the photoelectric converter is used as a measurement start trigger signal of the measuring device. Multipoint simultaneous measurement method. A device that installs measuring instruments at a plurality of measurement locations and starts measurement of vibration and noise at the same time, which emits an acoustic signal or an optical signal, and an acoustic or optical radiation unit that radiates. An electroacoustic transducer or photoelectric converter that detects an acoustic signal or an optical signal and outputs an electrical signal, and an electrical signal output from the electroacoustic transducer or photoelectric converter is processed to measure the measurement start trigger signal. A multi-point simultaneous measuring apparatus comprising arithmetic processing means for outputting to a measuring instrument.