CN105698917A - Infrasonic wave detection apparatus and detection method thereof - Google Patents
Infrasonic wave detection apparatus and detection method thereof Download PDFInfo
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- CN105698917A CN105698917A CN201610162233.0A CN201610162233A CN105698917A CN 105698917 A CN105698917 A CN 105698917A CN 201610162233 A CN201610162233 A CN 201610162233A CN 105698917 A CN105698917 A CN 105698917A
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- infrasonic wave
- infrasonic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
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Abstract
The invention discloses an infrasonic wave detection apparatus and a detection method thereof. A diode laser, a laser beam expander, a movable blade and a detector are installed in a housing successively from left to right; and a groove cooperating with the movable blade is formed in the inner wall of the housing. The upper end of the movable blade passes through the side surface of the housing and then is connected with a sensitive film piece; two protrusions are arranged at the two sides of the lower end of the movable blade; an acceleration sensor is embedded inside the sensitive film piece; and a displacement sensor is embedded into the movable blade. The detector is connected with an intelligent mobile terminal by a data acquisition card; and the intelligent mobile terminal is used for converting mechanical vibration information detected by the acceleration sensor a vibration signal power spectrum, thereby determining whether an infrasonic wave exists at a to-be-detected position. Calculation of the strength and frequency of the infrasonic wave is carried out according to the light intensity detected by the detector and data detected by the displacement sensor and a result is outputted. According to the invention, the overall structure of the apparatus is simple; the requirement of the processing precision of the device is low; the manufacturing cost is low; and the apparatus and method are easy to realize.
Description
Technical field
The present invention relates to infrasonic wave detection field, be specifically related to a kind of infrasonic wave detection apparatus and detection method thereof。
Background technology
Infrasonic wave, also known as infrasonic wave, generally refers to frequency 10-4Sound wave between Hz～20Hz。Infrasonic wave does not cause human auditory system under normal circumstances。The same with audible sound, infrasonic wave is produced by the mechanical vibration of various objects, by the vibration of various elastic fluids to surrounding diffusive transport。Scientific research finds, when many natural phenomenas occur, such as storm at sea, volcano eruption, earthquake, tsunami, lightning flashes and thunder rumbles, wave hits bank, typhoon, magnetic storm, aurora, hail etc., all can with infrasonic generation；In the activity relevant with the mankind, such as nuclear explosion, aircraft, rocket, missile flight, Canon launching, when train and subway high-speed travel, vehicle body wooden partition shakes with the infrasonic frequency coupling of air in car, and steamer navigates by water, the vehicle gone at express speed, high building and bridge rock, and even aerator, blender, megaphone etc. all can produce very strong infrasonic wave。Additionally, infrasonic wave is also distributed widely in commercial production, building industry and transportation, as produced the infrasonic wave of the 12dB sound intensity in the vehicle that gallops at all speed on highway, and owing to infrasonic frequency is low, wavelength is longer, therefore little by Absorption of Medium in the air, penetration capacity is very strong。
Human body can be worked the mischief by infrasonic wave。After human body is subject to the impact of low-intensity infrasonic sound, main manifestations is nonspecific stress and neuroendocrine disorders symptom: agitation, middle ear compressing, otalgia, tinnitus and headache, Nausea and vomiting, dysequilibrium, the dimness of vision etc.。The infrasonic sound of high intensity even may result in the physiological change that human body is serious, even dead。Because each organ of human body has its intrinsic frequency of vibration, and this frequency is between 3Hz～17Hz, these intrinsic frequencies of human body are restrained just within the scope of undersonic frequency, when infrasound exposure is in human body, if its frequency is close or equal with the own frequency at a certain position, namely bio-resonance can be caused to react so that it is absorb energy；Its resonance stimulates somatic sensor on the other hand, stimulation is passed to human central nervous system's region of interest, causes a series of function and morphologic change, finally affect tissue element structure, biological oxidation and energy metabolism, so that jeopardizing life。
Current infrasonic wave detection equipment mostly is condenser type infrasonic sensor, it requires that fine structure, design are tight, selection is strict, particularly requirement on machining accuracy is high, its major part is desirable that microstoning, and in order to ensure the long-time stability of its use, best insulator to be selected, in system, also require high-cleanness, high etc., the environmental condition impact on system stiffness must also be considered, " zero wafts " problem of the sensor caused by variation of ambient temperature；It addition, current infrasonic wave detection equipment is used for early warning and the monitoring of the natural disaster such as earthquake prediction, Marine Storm Genesis early warning, its kind is single, expensive, is not suitable for daily civilian。Mobile phone has had become as electronic product indispensable in people's daily life now, utilize merely the mike in mobile phone to carry out infrasonic wave and detect this method and infeasible, because the minimum pickup frequency of mobile microphone is usually above 20Hz, it is impossible to the detection frequency infrasonic wave lower than 20Hz。
Summary of the invention
For solving the problems referred to above, the invention provides a kind of infrasonic wave detection apparatus and detection method thereof。
For achieving the above object, the technical scheme that the present invention takes is:
Infrasonic wave detection apparatus, including shell, diode laser it is sequentially installed with from left to right in shell, laser beam expander, movable blades and detector, outer casing inner wall offers the groove matched with movable blades, described movable blades upper end is connected to sensitive diaphragm through the side of shell, it is protruding that both sides, lower end are provided with two, described sensitive diaphragm is embedded is provided with acceleration transducer, described movable blades is embedded is provided with displacement transducer, described detector is connected to an intelligent mobile terminal by data collecting card, described intelligent mobile terminal is for being converted to vibration signal power spectrum by the mechanical vibration information detected by acceleration transducer, it is distributed and infrasonic wave frequency range according to the signal frequency in described vibration signal power spectrum, thus judging whether described position to be measured has infrasonic existence, the calculating of infrasonic wave intensity and frequency is carried out by the light intensity detected by detector and the data detected by displacement transducer, and export result。
Wherein, described groove is made up of upper recess and lower end groove, and the width of upper recess is less than the width of lower end groove, and the wide thickness less than two projections of upper recess, slightly larger than the width of movable blades, the width of lower end groove is slightly larger than the width of movable blades。
Wherein, the inwall of described shell is hydrargyrum minute surface。
Wherein, the inwall of described groove, the outer wall of two projections and the outer wall of movable blades are smooth surface。
Wherein, the described two protruding and movable blades T-shaped blade of one-body molded composition。
Wherein, described diode laser is connected to temperature controller and current controller。
The detection method of above-mentioned infrasonic wave detection apparatus, comprises the steps:
S1, by current controller and temperature controller modulation diode laser instrument, the light of output wavelength stabilization, the list seam that output light is constituted through movable blades and shell one sidewall through laser beam expander, produce the first single slit diffraction striped, the detection of the first single slit diffraction fringe intensity is carried out by detector, and light intensity signal is converted to voltage signal output, the voltage signal of output is sent to intelligent mobile terminal via data collecting card；
S2, by infrasonic wave to be detected micro-shake so that sensitive diaphragm vibrate, thus affecting the width of single seam, produce the second single slit diffraction striped, the detection of the first single slit diffraction fringe intensity is carried out by detector, and convert the data detected by detector to voltage signal, the data that the voltage signal of output, movable sensor and acceleration transducer collect are sent to intelligent mobile terminal through data collecting card；
S3, intelligent mobile terminal receive data, and the mechanical vibration information detected by acceleration transducer is converted to vibration signal power spectrum, it is distributed and infrasonic wave frequency range according to the signal frequency in described vibration signal power spectrum, thus judging whether described position to be measured has infrasonic existence, change by relatively described first single slit diffraction striped and the second single slit diffraction striped, obtain the infrasonic information detected, and carried out the calculating of infrasonic wave intensity and frequency by the algorithm preset。
The method have the advantages that
Overall structure is simple, and the requirement on machining accuracy of device is not high, and cost of manufacture is low and is easily achieved。
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention infrasonic wave detection apparatus。
Fig. 2 is the structural representation of T-shaped blade in the embodiment of the present invention。
Fig. 3 is the structural representation of embodiment of the present invention further groove。
Detailed description of the invention
In order to make objects and advantages of the present invention clearly understand, below in conjunction with embodiment, the present invention is further elaborated。Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention。
As shown in Figure 1-2, embodiments provide a kind of infrasonic wave detection apparatus, including shell 1, diode laser 2 it is sequentially installed with from left to right in shell 1, laser beam expander 3, movable blades 5 and detector 9, shell 1 inwall offers the groove 4 matched with movable blades 5, described movable blades 5 upper end is connected to sensitive diaphragm 6 through the side of shell 1, both sides, lower end are provided with two projections 10, described sensitive diaphragm 6 is embedded is provided with acceleration transducer 7, described movable blades 5 is embedded is provided with displacement transducer 8, described detector 9 is connected to an intelligent mobile terminal by data collecting card, described intelligent mobile terminal is for being converted to vibration signal power spectrum by the mechanical vibration information detected by acceleration transducer, it is distributed and infrasonic wave frequency range according to the signal frequency in described vibration signal power spectrum, thus judging whether described position to be measured has infrasonic existence, the calculating of infrasonic wave intensity and frequency is carried out by the light intensity detected by detector and the data detected by displacement transducer, and export result。
As described in Figure 3, described groove 4 is made up of upper recess 41 and lower end groove 42, the wide width less than lower end groove 42 of upper recess 41, the wide thickness less than two projections 10 of upper recess 41, slightly larger than the width of movable blades 5, the wide width slightly larger than movable blades 5 of lower end groove 42。
The inwall of described shell 1 is hydrargyrum minute surface。
The inwall of described groove 4, the outer wall of two projections 10 and the outer wall of movable blades 5 are smooth surface。
Described two projections 10 and the movable blades 5 T-shaped blade of one-body molded composition。
Described diode laser 2 is connected to temperature controller and current controller。
The embodiment of the present invention additionally provides the detection method of above-mentioned infrasonic wave detection apparatus, comprises the steps:
S1, by current controller and temperature controller modulation diode laser instrument, the light of output wavelength stabilization, the list seam that output light is constituted through movable blades and shell one sidewall through laser beam expander, produce the first single slit diffraction striped, the detection of the first single slit diffraction fringe intensity is carried out by detector, and light intensity signal is converted to voltage signal output, the voltage signal of output is sent to intelligent mobile terminal via data collecting card；
S2, by infrasonic wave to be detected micro-shake so that sensitive diaphragm vibrate, thus affecting the width of single seam, produce the second single slit diffraction striped, the detection of the first single slit diffraction fringe intensity is carried out by detector, and convert the data detected by detector to voltage signal, the data that the voltage signal of output, movable sensor and acceleration transducer collect are sent to intelligent mobile terminal through data collecting card；
S3, intelligent mobile terminal receive data, and the mechanical vibration information detected by acceleration transducer is converted to vibration signal power spectrum, it is distributed and infrasonic wave frequency range according to the signal frequency in described vibration signal power spectrum, thus judging whether described position to be measured has infrasonic existence, change by relatively described first single slit diffraction striped and the second single slit diffraction striped, obtain the infrasonic information detected, and carried out the calculating of infrasonic wave intensity and frequency by the algorithm preset。
Wherein, the width of movable blades 5 is slightly less than the width of shell, when test, sensitive diaphragm 6 need to be made to be positioned at the side of shell 1, and by movable blades 5 from shell 1 pull out, until cannot pull, sensitive diaphragm 6 does not contact with ground or supporting surface simultaneously, to reduce error。
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention。
Claims (7)
1. infrasonic wave detection apparatus, including shell (1), it is characterized in that, diode laser (2) it is sequentially installed with from left to right in shell (1), laser beam expander (3), movable blades (5) and detector (9), shell (1) inwall offers the groove (4) matched with movable blades (5), described movable blades (5) upper end is connected to sensitive diaphragm (6) through the side of shell (1), both sides, lower end are provided with two protruding (10), described sensitive diaphragm (6) is embedded is provided with acceleration transducer (7), described movable blades (5) is embedded is provided with displacement transducer (8), described detector (9) is connected to an intelligent mobile terminal by data collecting card, described intelligent mobile terminal is for being converted to vibration signal power spectrum by the mechanical vibration information detected by acceleration transducer, it is distributed and infrasonic wave frequency range according to the signal frequency in described vibration signal power spectrum, thus judging whether described position to be measured has infrasonic existence, the calculating of infrasonic wave intensity and frequency is carried out by the light intensity detected by detector and the data detected by displacement transducer, and export result。
2. infrasonic wave detection apparatus as claimed in claim 1, it is characterized in that, described groove (4) is made up of upper recess (41) and lower end groove (42), the width of upper recess (41) is less than the width of lower end groove (42), the wide thickness less than two projections (10) of upper recess (41), slightly larger than the width of movable blades (5), the width of lower end groove (42) is slightly larger than the width of movable blades (5)。
3. infrasonic wave detection apparatus as claimed in claim 1, it is characterised in that the inwall of described shell (1) is hydrargyrum minute surface。
4. infrasonic wave detection apparatus as claimed in claim 1, it is characterised in that the inwall of described groove (4), the two protruding outer walls of (10) and the outer wall of movable blades (5) are smooth surface。
5. infrasonic wave detection apparatus as claimed in claim 1, it is characterised in that described two protruding (10) and the T-shaped blade of movable blades (5) one-body molded composition。
6. infrasonic wave detection apparatus as claimed in claim 1, it is characterised in that described diode laser (2) is connected to temperature controller and current controller。
7. the detection method of the infrasonic wave detection apparatus as described in any one of claim 1-6, it is characterised in that comprise the steps:
S1, by current controller and temperature controller modulation diode laser instrument, the light of output wavelength stabilization, the list seam that output light is constituted through movable blades and shell one sidewall through laser beam expander, produce the first single slit diffraction striped, the detection of the first single slit diffraction fringe intensity is carried out by detector, and light intensity signal is converted to voltage signal output, the voltage signal of output is sent to intelligent mobile terminal via data collecting card；
S2, by infrasonic wave to be detected micro-shake so that sensitive diaphragm vibrate, thus affecting the width of single seam, produce the second single slit diffraction striped, the detection of the first single slit diffraction fringe intensity is carried out by detector, and convert the data detected by detector to voltage signal, the data that the voltage signal of output, movable sensor and acceleration transducer collect are sent to intelligent mobile terminal through data collecting card；
S3, intelligent mobile terminal receive data, and the mechanical vibration information detected by acceleration transducer is converted to vibration signal power spectrum, it is distributed and infrasonic wave frequency range according to the signal frequency in described vibration signal power spectrum, thus judging whether described position to be measured has infrasonic existence, change by relatively described first single slit diffraction striped and the second single slit diffraction striped, obtain the infrasonic information detected, and carried out the calculating of infrasonic wave intensity and frequency by the algorithm preset。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610162233.0A CN105698917A (en) | 2016-03-17 | 2016-03-17 | Infrasonic wave detection apparatus and detection method thereof |
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| CN201610162233.0A CN105698917A (en) | 2016-03-17 | 2016-03-17 | Infrasonic wave detection apparatus and detection method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109389801A (en) * | 2017-08-12 | 2019-02-26 | 段云涛 | A kind of infrasound rescue system and method |
| CN109814152A (en) * | 2019-03-04 | 2019-05-28 | 昆明理工大学 | A kind of infrasound sensor and its implementation |
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| CN104019890A (en) * | 2014-06-05 | 2014-09-03 | 无锡智感星际科技有限公司 | Infrasonic wave detection method and detection device thereof |
| CN104568118A (en) * | 2015-01-09 | 2015-04-29 | 江苏大学 | Visual mechanical vibration detecting system |
| CN104596971A (en) * | 2014-12-27 | 2015-05-06 | 辽东学院 | Sensor system for detecting gas |
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| JPS6358118A (en) * | 1986-08-27 | 1988-03-12 | N F Kairo Sekkei Block:Kk | Characteristics measuring apparatus for ultrasonic vibration detecting sensor |
| JP2003065837A (en) * | 2001-08-30 | 2003-03-05 | Suzuki Motor Corp | Instrument and method for measuring vibration, and program for measuring vibration |
| CN101871807A (en) * | 2010-04-16 | 2010-10-27 | 华南师范大学 | Infrasonic wave detection device and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109389801A (en) * | 2017-08-12 | 2019-02-26 | 段云涛 | A kind of infrasound rescue system and method |
| CN109814152A (en) * | 2019-03-04 | 2019-05-28 | 昆明理工大学 | A kind of infrasound sensor and its implementation |
| CN109814152B (en) * | 2019-03-04 | 2023-11-24 | 昆明理工大学 | Infrasound sensor and implementation method thereof |
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