JP3115963U - Vibration analyzer for each portable frequency band - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration analysis device for each portable frequency band that can be easily carried, can detect vibrations such as sound at a place away from the generation source, can accurately remove noise, and can be recorded and reproduced. provide.
The vibration detected by the vibration sensor 10 is converted into an electric signal by the preamplifier 20 and input to the sound board of the personal computer 100 (or 110), digitized, and displayed on the spectrogram 60 for each frequency band while the graphic equalizer 70 is displayed. It is the apparatus comprised so that a fine filter process might be possible. The processed signal can be recorded and stored in the hard disk 50 together with the time information, and can be reproduced at any time, and can be easily listened to.
[Selection] Figure 1

Description

  The present invention relates to a vibration analysis device for each portable frequency band.

As a background art of the present invention, for example, there is a so-called concrete microphone that is commercially available. In addition, there is a voice recording system (Patent Document 1) for recording evidence of voice data, which records conversations such as commercial transactions by a mobile communication terminal (mobile phone).
JP 2002-230203 A

  The concrete microphone described above is a mechanism for listening to sound by attaching a vibration sensor connected to a cable at a distance of several tens of centimeters from the sound listening device body to a wall or window glass. In the audio listening device main body, the audio signal is amplified by an amplifier, and the operator can operate the volume knob to adjust the sound volume and listen to it with the earphone. Furthermore, in the audio listening device main body, noise can be reduced by filtering the audio signal through a low-pass filter and / or a high-pass filter.

Moreover, in the audio recording system described in Patent Document 1, if a mobile phone is regarded as a vibration sensor, the function similar to that of the concrete microphone described above can be achieved. However, since a server computer connected to the Internet is essential, it is convenient for recording conversations of an unspecified number of customers, but there is an inconvenience that the entire apparatus cannot be carried.
The above-mentioned concrete microphone is portable, so, for example, in police activities, listening to conversations and noises of criminals and hostages in the room and in the car through walls and window glass in cases of standing up One application can be applied to such a special purpose. However, in such a case, since the voice is heard near the criminal, the investigator is likely to be in a dangerous state, and when the investigator approaches, the criminal may be stimulated. In addition, the signal captured by the vibration sensor may include not only the necessary audio signal but also ambient noise (noise). There is no way to adjust. That is, since it has only a simple filter processing function such as a high-pass filter or a low-pass filter, there is a limit to the fineness of noise removal. Furthermore, since there is no recording / playback function, it is not possible to record and save audio.

  The present invention solves the above-mentioned problems, can be easily carried, can detect vibrations such as sound at a place away from the source, preferably removes noise accurately, and more preferably records. An object of the present invention is to provide a vibration analysis device for each portable frequency band that can be reproduced.

The present invention for solving the above problems is as follows.
(1) A vibration analysis apparatus for each portable frequency band, wherein vibrations captured by a vibration sensor are converted into electrical signals, and the electrical signals are digitized and displayed for each frequency band.
(2) A vibration analysis apparatus for each portable frequency band, wherein the vibration detected by the vibration sensor is converted into an electric signal, and the electric signal is digitized to adjust the intensity for each frequency band.

(3) The vibration detected by the vibration sensor is converted into an electrical signal, and the electrical signal is digitized and displayed for each frequency band. The operator can adjust the intensity of the displayed result. Vibration analysis device for each carrier frequency band.
(4) The vibration analyzing apparatus according to portable frequency band according to any one of (1) to (3), comprising means for recording and reproducing a digitized signal.

(5) The vibration analysis device for each portable frequency band according to (4), wherein the digitized signal can be recorded together with time information.
(6) The vibration analysis device for each portable frequency band according to (4) or (5), comprising means for making recorded and / or reproduced signals audible.
(7) The vibration analysis device for each portable frequency band according to any one of (4) to (6), which is used for police activities.

  According to the present invention, it is easy to carry, vibrations such as sound can be detected at a location away from the source, noise can be accurately eliminated, and vibrations by portable frequency band that can be recorded and played back. Since an analysis device can be provided, it can be used for various purposes including police activities and disaster relief activities.

  In the best mode for carrying out the present invention, a vibration sensor, a means (converter) for converting vibration captured by the vibration sensor into an electric signal, an input device for receiving the electric signal, and the received electric Means for digitizing the signal (AD converter = analog-digital converter), means for displaying the digitized signal for each frequency band (digital signal display means for each frequency band), and an operator for the displayed result Has means (digital signal intensity adjusting means for each frequency band) that makes it possible to adjust the intensity. More preferably, it further comprises means (recording / reproducing means) for recording and reproducing the digitized signal so that the digitized signal can be recorded together with the time information, and in addition, the means for making the digitized signal audible (DA Converter = digital-analog converter, output device and listening device). A particularly suitable use is for police activities.

The input device and the output device may be separate devices, but from the viewpoint of miniaturization, an input / output device that combines them into one is preferable. Similarly, the AD converter and the DA converter may be separate devices, but from the viewpoint of miniaturization, an AD / DA converter in which these are combined into one is preferable.
The vibration sensor may be of any form as long as it is small and can pick up sound with high sensitivity. As the converter, a small converter having an amplification function (for example, a preamplifier) is preferable.

  Input / output device, AD / DA converter, digital signal display means for each frequency band, digital signal intensity adjustment means for each frequency band, recording / reproducing means, means for recording digitized signal together with time information, DA converter and audible It is preferable that all of the converting means have functions integrated or partly attached to one personal computer (personal computer). Specifically, the input / output device and the AD / DA converter are a sound board in which these are combined, the spectrogram for the digital signal display means for each frequency band, the graphic equalizer for the digital signal intensity control means for each frequency band, and the recording / reproducing means For example, a hard disk (may be a memory), a clock data recording function for recording a digitized signal together with time information, and a headphone (or earphone) for listening are preferably used.

  The personal computer may be a desktop personal computer or a notebook personal computer. The desktop PC is a car, and the laptop is easy to carry. The communication path of the electrical signal from the preamplifier to the personal computer may be either wireless or wired, and can be extended to 100m or more, so if the vibration sensor is successfully installed, it will be a standing case, from the criminal You can listen to audio from a sufficiently distant location. However, since radio may be affected by disturbances such as aerial radio waves, wired is preferable in places that are easily affected by such disturbances. It should be noted that ordinary people are not allowed to enter the site such as standing up, so that wired communication does not hinder ordinary traffic. As the cable, a cord reel can be preferably used. A repeater may be provided in the middle of the communication path from the preamplifier to the personal computer.

  The electrical signal taken into the personal computer from the input device equivalent part of the sound board is digitized by the AD converter equivalent part of the sound board and displayed on the spectrogram for each frequency band. The operator can adjust the intensity for each frequency band with a graphic equalizer while observing the display result. As a result, it is possible to perform much finer filter processing as compared with conventional simple filter processing such as a high-pass filter and a low-pass filter, and accurate noise removal becomes possible.

  Furthermore, the digitized signal can be stored for a long period of time with high sound quality by recording it in a hard disk or memory together with time information, and can be reproduced together with the time information at any time. The reproduced digital signal can be analogized by the DA converter equivalent part of the sound board and listened to with headphones or earphones. In addition, listening from a speaker is also possible.

Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIG. 1 is a schematic view showing an embodiment (1) of the present invention. In FIG. 1A, a desktop personal computer 100 is mounted on a police car 200, and the vibration sensor 10 and the preamplifier 20 are fixed by a tripod 22 at a location about 100 m away from the car 200. As shown in Fig. 1 (b), the vibration sensor 10 and the preamplifier 20 are affixed to the wall (or window glass) 80 of the room where the culprit stood up with a fixture such as the arm 23 with a suction cup. Can also be fixed. Conversations and sounds captured by the vibration sensor 10 are converted into electrical signals by the converter 20 and sent to the desktop personal computer 100 by radio 21 (may be wired).

  As shown in FIG. 1C, the desktop personal computer 100 has a configuration in which a display 102, a keyboard 103, a mouse 104, and a listening device such as a headphone 105 are externally attached to a personal computer main body 101. As shown in FIG. 1 (d), the desktop personal computer 100 is equipped with a sound board in which an audio analog signal input / output device 30 and an AD / DA converter 40 are combined, and a hard disk 50. An electric signal sent by a wire may be received by the input / output device 30 (the input device equivalent unit) and digitized by the AD / DA converter 40 (the AD conversion function unit). This digitized signal (digital signal) is displayed for each frequency band on an operation screen as shown in FIG. 3 later by operating a voice processing means (mounted on the sound board) (not shown). The displayed result is recorded as it is or based on the result, and the intensity adjusted by the operator for each frequency band is recorded and stored in the hard disk 50 together with the time information. A memory may be used instead of the hard disk 50.

The digital signal stored in the hard disk 50 can be reproduced together with time information at any time. The reproduced digital signal can be analogized by the AD / DA converter 40 (a DA conversion function unit thereof) and listened to by a listening device such as the headphones 105.
FIG. 2 is a schematic view showing an embodiment (2) of the present invention. In this embodiment (2), in the embodiment (1), the notebook personal computer 110 is used instead of the desktop personal computer 100, and the wired 25 is used instead of the wireless 21. In the notebook personal computer 110, a personal computer main body, a display, and a keyboard are integrated, and a listening device such as a mouse 104 and a headphone 105 is externally attached. Instead of the illustrated notebook computer 110, a type of notebook computer in which a mouse is incorporated in a keyboard may be used.

  FIG. 3 is a schematic diagram showing a state of an operation screen in which digital signals are displayed according to frequency bands in the embodiments (1) to (2) and the operator can adjust the intensity of the displayed results. In this operation screen, the digital signal is displayed on the spectrogram 60. In the spectrogram 60 display specification, the frequency is plotted on the vertical axis and the time is plotted on the horizontal axis, and displayed according to the color according to the signal intensity level and scrolled with time. While observing the display result, the operator can perform fine filter processing by moving the volume knob for each frequency band of the graphic equalizer 70 up and down with the mouse 104 and performing the intensity adjustment operation for each frequency band of the display result. Therefore, accurate noise removal is possible.

  Reference numeral 61 denotes a time information display unit that displays time information recorded together with the digital signal. Reference numeral 62 denotes a recording storage destination file name display that displays the digital signal and time information recording and the file name in the storage destination hard disk 50. 63 is a frequency band range setting unit that sets the frequency band range of the input signal to be processed. Reference numeral 64 denotes an analog signal waveform display unit that displays an analog signal waveform corresponding to the digital signal currently being processed. Reference numeral 65 denotes an analog signal strength display unit that displays the intensity of the analog signal on a decibel scale.

  FIG. 4 is a schematic view showing an embodiment (3) of the present invention. In this embodiment (3), instead of connecting the converter 20 to the input / output device 30 of the notebook computer 110 directly in the wired 25 in the embodiment (2), the connection is made by relaying in the junction box 35. I made it. The junction box 35 is provided with a signal input terminal, a connection terminal with a personal computer, a headphone output terminal, a wireless output terminal, a recording output terminal, a speaker output terminal, and the like. An electric signal from the converter 20 is input to the signal input terminal via the wire 25. The input signal can be transmitted to a sound board in the notebook computer 110 via a connection line 27 that connects the connection terminal and the input / output device 30 of the notebook computer 110 via a connection terminal with the personal computer. On the other hand, the input signal can be transmitted to each output terminal of the junction box 35. The output signal from the input / output device 30 of the notebook computer 110 is input to the connection terminal of the junction box 35 with the personal computer through the connection line 27 and can be transmitted to each output terminal.

  According to this, the raw voice before noise removal is recorded on the tape recorder from the recording output terminal to further improve the evidence, or the raw voice or the noise-removed voice is recorded from the wireless output terminal, for example, police radio It is possible to transmit to other places via the network, etc., and the convenience for smoothly carrying out various activities including police activities and disaster relief activities is further improved.

It is the schematic which shows Example (1) of this invention. It is the schematic which shows Example (2) of this invention. It is the schematic which shows the mode of an operation screen. It is the schematic which shows Example (3) of this invention.

Explanation of symbols

10 Vibration sensor
20 Converter (Preamplifier)
21 Communication path (wireless)
22 Fixing device (tripod)
23 Fixing device (suction cup arm)
25 Communication path (wired)
27 Connection line (for input and output)
30 Input / output devices (collected on sound board)
35 Junction box (repeater)
40 AD / DA converter (collected on sound board)
50 Hard disk (recording / playback device)
60 Spectrogram (Digital signal display means by frequency band)
61 Time information display
62 Record save destination file name display area
63 Frequency band range setting section
64 Analog signal waveform display
65 Analog signal strength display
70 Graphic equalizer (digital signal strength adjustment means for each frequency band)
80 walls (or window glass)
100 desktop computers (personal computers)
101 PC
102 Display (display device)
103 Keyboard (operation means)
104 Mouse (operation means)
105 Headphone (listening device)
110 Laptop (personal computer)
200 cars

Claims (7)

  A vibration analysis device for each portable frequency band, wherein the vibration captured by the vibration sensor is converted into an electric signal, and the electric signal is digitized and displayed for each frequency band.   A vibration analyzing apparatus for each portable frequency band, wherein vibrations captured by a vibration sensor are converted into electric signals, and the electric signals are digitized to adjust the intensity for each frequency band.   A portable frequency band characterized by converting vibration captured by the vibration sensor into an electrical signal, digitizing the electrical signal, displaying it by frequency band, and allowing the operator to adjust the intensity of the displayed result. Another vibration analyzer.   The vibration analysis apparatus according to any one of claims 1 to 3, further comprising means for recording and reproducing a digitized signal.   The vibration analysis apparatus according to portable frequency band according to claim 4, wherein the digitized signal can be recorded together with time information.   6. The vibration analyzing apparatus according to portable frequency band according to claim 4, further comprising means for making recorded and / or reproduced signals audible.   It is for police activities, The vibration analysis apparatus classified by portable frequency band in any one of Claims 4-6.

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