CN109520614A - A kind of live-working safety prior-warning device and method based on equipment noise identification - Google Patents
A kind of live-working safety prior-warning device and method based on equipment noise identification Download PDFInfo
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- G—PHYSICS
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- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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Abstract
The present invention relates to a kind of live-working safety prior-warning devices and method based on equipment noise identification, belong to live-working safety early warning technology field.The device includes sound pick-up, analog signal processing circuit, analog to digital conversion circuit, master controller, memory, buzzer, alarm lamp, power module and battery；Sound pick-up, analog signal processing circuit, analog to digital conversion circuit, master controller are linked in sequence；Battery is connected with power module；Power module is connected with analog signal processing circuit, analog to digital conversion circuit, master controller, memory, buzzer, alarm lamp respectively；Master controller is also connected with buzzer, alarm lamp respectively.Apparatus of the present invention structure is simple, easy to use, is based on Acoustic detection principle, not vulnerable to the interference of electromagnetic field, the probability of wrong report can effectively reduce, other than judging safe spacing, can also automatic identification equipment type and voltage class, warning information more comprehensively, application easy to spread.
Description
Technical field
The invention belongs to live-working safety early warning technology field, the livewire work identified based on equipment noise is particularly belonged to
A kind of safe early warning technical field, and in particular to live-working safety prior-warning device and method based on equipment noise identification.
Background technique
With constantly improve for power grid coverage area and being continuously increased for power demand, in order to improve the effect of power Transmission
Rate, reduction are lost on the way, and the mode for generalling use high voltage power transmission at present carries out power transmission, including common 10kV, 35kV,
110kV, 220kV, 1000kV ac transmission and 500kV, 800kV direct current transportation.With the continuous improvement of transmission voltage, changing
While kind power transfer efficiency, the risk of livewire work is also increased, so that must reserve during livewire work bigger
Safe spacing, just can guarantee the personal safety of operating personnel.But due to the diversity of electric operating site environment, cover room
Interior and outdoor work scene, or even come including field operation environment, this judgement for being just live-working safety spacing and indicating strip
Difficulty.
Judgement and mark problem for live-working safety spacing in power generation operation process, the measure taken at present
Mainly include following several: the scene relatively good for work site environments condition, such as substation or indoor environment can be used
Markings are brushed on ground and charging equipment, the mode of suspension warning sign passively reminds operation safety spacing；It can adopt
The field distribution of operation field is measured with the electric field strength detection device of profession；It can be used based on electromagnetic field inducing principle
Sensor rough measure is carried out to the electric field strength of operation field, to judge operating personnel present position whether in safe range
It is interior.
But the above method still has some shortcomings: between operation safety by way of brushing markings, suspension warning sign
Although fairly simple intuitive away from passively being reminded, this method is not applicable for field operation environment, and markings and police
Show that board is easy to be influenced by aging or incrustation and cause to be difficult to recognize；Electric field strength detection device using profession is with higher
Measurement accuracy, but this kind of equipment volume is larger, and price is costly, it is difficult to be widely applied；Using based on electromagnetic field inducing principle
Sensor is integrated into wearable device in which although can be convenient, but for the electromagnetic field environment of the complexity such as substation, is passed
Sensor is easy to be influenced by external noise field and cause to report by mistake.Therefore how overcome the deficiencies in the prior art, which is current electrification, is made
The problem of industry safe early warning technical field urgent need to resolve.
Summary of the invention
It is an object of the present invention to solve the deficiency of the existing technology and provide a kind of electrification works based on equipment noise identification
Industry safety early warning device and method, by the noise that generates in the detection power equipment course of work, and with distinct device difference work
The operating noise characteristic made under voltage class compares, and is realized by way of spectral contrast to device type and equipment
The identification of operational voltage level, the strength retrogression's formula then propagated in air according to sound wave are realized to operating personnel and electric power
The calculating of spacing between equipment, to judge whether operating personnel is within the scope of safe spacing, and by way of sound-light alarm
Carry out safe early warning.
To achieve the above object, The technical solution adopted by the invention is as follows:
A kind of live-working safety prior-warning device based on equipment noise identification, including sound pick-up, analog signal processing circuit, mould
Number conversion circuit, master controller, memory, buzzer, alarm lamp, power module and battery；
The sound pick-up, analog signal processing circuit, analog to digital conversion circuit, master controller are linked in sequence；
Battery is connected with power module；
Power module refers to analog signal processing circuit, analog to digital conversion circuit, master controller, memory, buzzer, alarm respectively
Show that lamp is connected；
Master controller is also connected with memory, buzzer, alarm lamp respectively；
Sound pick-up is used to acquire the equipment operating noise at electric operating scene；
Analog signal processing circuit is used to handle the equipment operating noise at sound pick-up collected electric operating scene, with
Amplified signal amplitude simultaneously filters out high-frequency harmonic noise, obtains analog audio signal；
Analog to digital conversion circuit is used for that treated that analog audio signal is converted to digital audio and video signals by analog signal processing circuit；
Memory is used to save the operating noise characteristic and safe spacing threshold value of distinct device under different voltages grade；
Master controller for the digital audio and video signals that analog to digital conversion circuit transmits are analyzed and processed and with stored in memory
Different voltages grade under the operating noise characteristic of distinct device compare, realized according to the spectrum signature of noise to setting
Standby type, operational voltage level judgement and calculate spacing between operating personnel and equipment, when spacing in memory lower than storing
Corresponding safe spacing threshold value when, control buzzer and alarm lamp work alarm；
Power module is for converting the voltage of battery, to be suitble to analog signal processing circuit, analog to digital conversion circuit, master control
Device processed, memory, buzzer, alarm lamp for operating voltage demand.
It is further preferred that analog signal processing circuit is made of amplifying circuit and filter circuit.Wherein amplifying circuit
Using the negative-feedback operational amplification circuit built by high speed operation amplifier, gain amplifier can be adjusted control by master controller
System, unity gain bandwidth are not less than 1MHz, for carrying out amplitude amplification to the collected noise signal of sound pick-up institute；Filter circuit
Passive low-pass filter mode or active low-pass filter mode can be used, for filtering out high-frequency harmonic noise.
It is further preferred that master controller uses technical grade microcontroller, dominant frequency is not less than 100MHz, operating temperature
Lower limit is not higher than -40 DEG C, and the operating temperature upper limit is not less than+85 DEG C.
It is further preferred that memory is using EEPROM, FLASH or FRAM type storage chip as storage medium.
It is further preferred that operating noise characteristic includes noise spectrum, operational voltage level and corresponding work
The noise intensity of apparatus body present position under voltage class.
It is further preferred that livewire work scene is installed or be integrated in the live-working safety prior-warning device
On the crash helmet of operating personnel or clothes outer surface.
Present invention simultaneously provides a kind of live-working safety method for early warning based on equipment noise identification, are based on using above-mentioned
The live-working safety prior-warning device of equipment noise identification, includes the following steps:
Step (1) utilizes the equipment operating noise at sound pick-up acquisition electric operating scene；
Step (2), analog signal processing circuit handles the equipment operating noise at collected electric operating scene, to put
Big signal amplitude simultaneously filters out high-frequency harmonic noise, obtains analog audio signal, and later, analog to digital conversion circuit is by analog signal processing
Analog audio signal after processing of circuit is converted to digital audio and video signals；
Step (3), master controller is analyzed and processed digital audio and video signals, obtain digital audio and video signals in noise spectrum and
The noise intensity of different frequency ingredient；
Step (4), the different electricity that master controller will be saved in the noise spectrum and memory in the digital audio and video signals of acquisition
The operating noise property data base of distinct device under grade is pressed to carry out Frequency spectrum ratio pair, so that it is determined that the type and operating voltage of equipment
Grade；
Step (5), main controller read the correspondence work electricity saved in the operating noise property data base saved in memory
The noise intensity of apparatus body present position under grade, and the strength retrogression's formula propagated in air according to sound wave are pressed, is calculated
Spacing between operating personnel and equipment；
Step (6), when the spacing between staff and equipment is less than the safe spacing threshold value saved in memory, master control
Device control buzzer processed and alarm lamp work, realize and prompt the safe early warning of staff.
It is further preferred that it is using FFT that master controller, which is analyzed and processed digital audio and video signals, in step (3)
Algorithm carries out discrete Fourier transform processing to digital audio and video signals.
Analog to digital conversion circuit of the present invention preferably uses high-speed-differential modulus conversion chip to build, and sampling rate is not less than
1MSPS, resolution ratio are not less than 16.
The power module can be used DC-DC or LDO chip and be built.
Please provide strength retrogression's formula that the sound wave that the present invention uses is propagated in air can be which (it is recommended that providing ginseng
Examine document)
Strength retrogression's formula that sound wave is propagated in air is
WhereinI 0 For the intensity of acoustic wave at sound source,xFor the propagation distance of sound wave,αFor the attenuation coefficient of sound wave,IFor Acoustic Wave Propagation x
Intensity after distance,eFor natural constant.
Bibliography: " ultrasonic handbook ", Feng Ruo chief editor, publishing house, Nanjing University publishes, October the 1st edition in 1999
Compared with prior art, the present invention has the advantages that:
(1) a kind of live-working safety prior-warning device and method based on equipment noise identification proposed by the present invention, is based on acoustics
Testing principle can effectively reduce the probability of wrong report not vulnerable to the interference of electromagnetic field；
(2) apparatus of the present invention structure is simple, it is convenient to it is all kinds of wearable to be integrated into saddlebag, work clothes, crash helmet etc.
In accessory；
(3) present invention is other than judging safe spacing, can also automatic identification equipment type and voltage class, warning information is more complete
Face.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the live-working safety prior-warning device based on equipment noise identification；Wherein, 1, pickup
Device；2, analog signal processing circuit；3, analog to digital conversion circuit；4, master controller；5, memory；6, buzzer；7, police instruction
Lamp；8, power module；9, battery；
Fig. 2 is the circuit diagram of analog signal processing circuit used by the embodiment of the present invention；
Fig. 3 is the circuit diagram of analog to digital conversion circuit used by the embodiment of the present invention.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail.
It will be understood to those of skill in the art that the following example is merely to illustrate the present invention, and it should not be regarded as limiting this hair
Bright range.In the examples where no specific technique or condition is specified, described technology or conditions according to the literature in the art
Or it is carried out according to product description.Production firm person is not specified in material therefor or equipment, is that can be obtained by purchase
Conventional products.
Those skilled in the art can understand that the correlation module being related to and its function of realization in the present invention
It is that computer software programs conventional in the prior art are carried on improved hardware and its device of composition, device or system
Or related agreement achieves that, is improved to computer software programs in the prior art or related agreement.For example,
Improved computer hardware system still can realize the spy of the hardware system by loading existing operation system of software
Determine function.It is understood, therefore, that innovation of the invention is improvement and its company to hardware module in the prior art
Syntagmatic is connect, rather than is only to the improvement in hardware module to realize the software carried in relation to function or agreement.
Those skilled in the art can understand that correlation module mentioned in the present invention is for executing the application
Described in operation, method, the step in process, measure, one or more hardware devices in scheme.The hardware device can
Think required purpose and specially design and manufacture, or can also using in general purpose computer known device or it is known its
His hardware device.The general purpose computer is activated or is reconstructed with having the procedure selection being stored in it.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in specification of the invention
Diction " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member
Part is " connected " or when " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be
Intermediary element.In addition, " connection " used herein or " coupling " may include being wirelessly connected or coupling.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation " " connects
Connect ", " being equipped with " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, it can also be indirectly connected through an intermediary.For this
For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention is understood as the case may be.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, which should be understood that, to be had and the meaning in the context of the prior art
The consistent meaning of justice, and unless defined as here, it will not be explained in an idealized or overly formal meaning.
Embodiment 1
As shown in Figure 1, a kind of live-working safety prior-warning device based on equipment noise identification, including sound pick-up 1, analog signal
Processing circuit 2, analog to digital conversion circuit 3, master controller 4, memory 5, buzzer 6, alarm lamp 7, power module 8 and battery
9；
The sound pick-up 1, analog signal processing circuit 2, analog to digital conversion circuit 3, master controller 4 are linked in sequence；
Battery 9 is connected with power module 8；
Power module 8 respectively with analog signal processing circuit 2, analog to digital conversion circuit 3, master controller 4, memory 5, buzzer 6,
Alarm lamp 7 is connected；
Master controller 4 is also connected with memory 5, buzzer 6, alarm lamp 7 respectively；
Sound pick-up 1 is used to acquire the equipment operating noise at electric operating scene；
Analog signal processing circuit 2 is used to handle the equipment operating noise at 1 collected electric operating scene of sound pick-up,
With amplified signal amplitude and high-frequency harmonic noise is filtered out, obtains analog audio signal；
Analog to digital conversion circuit 3 is used for treated analog audio signal the is converted to digital audio letter of analog signal processing circuit 2
Number；
Memory 5 is used to save the operating noise characteristic and safe spacing threshold value of distinct device under different voltages grade；
Master controller 4 for the digital audio and video signals that analog to digital conversion circuit 3 transmits are analyzed and processed and with 5 memory of memory
The operating noise characteristic of distinct device compares under the different voltages grade of storage, according to the realization pair of the spectrum signature of noise
Device type, operational voltage level judgement and calculate spacing between operating personnel and equipment, when spacing be lower than 5 memory of memory
When the corresponding safe spacing threshold value of storage, buzzer and alarm lamp work alarm are controlled；
Power module 8 for being converted to the voltage of battery 9, be suitble to analog signal processing circuit 2, analog to digital conversion circuit 3,
Master controller 4, memory 5, buzzer 6, alarm lamp 7 for operating voltage demand.
A kind of live-working safety method for early warning based on equipment noise identification, is made an uproar using the present embodiment is above-mentioned based on equipment
The live-working safety prior-warning device of sound identification, includes the following steps:
Step (1) utilizes the equipment operating noise at sound pick-up acquisition electric operating scene；
Step (2), analog signal processing circuit handles the equipment operating noise at collected electric operating scene, to put
Big signal amplitude simultaneously filters out high-frequency harmonic noise, obtains analog audio signal, and later, analog to digital conversion circuit is by analog signal processing
Analog audio signal after processing of circuit is converted to digital audio and video signals；
Step (3), master controller is analyzed and processed digital audio and video signals, obtain digital audio and video signals in noise spectrum and
The noise intensity of different frequency ingredient；
Step (4), the different electricity that master controller will be saved in the noise spectrum and memory in the digital audio and video signals of acquisition
The operating noise property data base of distinct device under grade is pressed to carry out Frequency spectrum ratio pair, so that it is determined that the type and operating voltage of equipment
Grade；
Step (5), main controller read the correspondence work electricity saved in the operating noise property data base saved in memory
The noise intensity of apparatus body present position under grade, and the strength retrogression's formula propagated in air according to sound wave are pressed, is calculated
Spacing between operating personnel and equipment；
Step (6), when the spacing between staff and equipment is less than the safe spacing threshold value saved in memory, master control
Device control buzzer processed and alarm lamp work, realize and prompt the safe early warning of staff.
Embodiment 2
As shown in Figure 1, a kind of live-working safety prior-warning device based on equipment noise identification, including sound pick-up 1, analog signal
Processing circuit 2, analog to digital conversion circuit 3, master controller 4, memory 5, buzzer 6, alarm lamp 7, power module 8 and battery
9；
The sound pick-up 1, analog signal processing circuit 2, analog to digital conversion circuit 3, master controller 4 are linked in sequence；
Battery 9 is connected with power module 8；
Power module 8 respectively with analog signal processing circuit 2, analog to digital conversion circuit 3, master controller 4, memory 5, buzzer 6,
Alarm lamp 7 is connected；
Master controller 4 is also connected with memory 5, buzzer 6, alarm lamp 7 respectively；
Sound pick-up 1 is used to acquire the equipment operating noise at electric operating scene；
Analog signal processing circuit 2 is used to handle the equipment operating noise at 1 collected electric operating scene of sound pick-up,
With amplified signal amplitude and high-frequency harmonic noise is filtered out, obtains analog audio signal；
Analog to digital conversion circuit 3 is used for treated analog audio signal the is converted to digital audio letter of analog signal processing circuit 2
Number；
Memory 5 is used to save the operating noise characteristic and safe spacing threshold value of distinct device under different voltages grade；
Master controller 4 for the digital audio and video signals that analog to digital conversion circuit 3 transmits are analyzed and processed and with 5 memory of memory
The operating noise characteristic of distinct device compares under the different voltages grade of storage, according to the realization pair of the spectrum signature of noise
Device type, operational voltage level judgement and calculate spacing between operating personnel and equipment, when spacing be lower than 5 memory of memory
When the corresponding safe spacing threshold value of storage, buzzer and alarm lamp work alarm are controlled；
Power module 8 for being converted to the voltage of battery 9, be suitble to analog signal processing circuit 2, analog to digital conversion circuit 3,
Master controller 4, memory 5, buzzer 6, alarm lamp 7 for operating voltage demand.
Analog signal processing circuit 2 is made of amplifying circuit and filter circuit, and circuit diagram is as shown in Figure 2.Analog-to-digital conversion
The circuit diagram of circuit 3 is as shown in Figure 3.
Master controller 4 uses technical grade microcontroller, and dominant frequency is not less than 100MHz, and operating temperature lower limit is not higher than -40 DEG C,
The operating temperature upper limit is not less than+85 DEG C.
Memory 5 is using EEPROM, FLASH or FRAM type storage chip as storage medium.
Operating noise characteristic includes equipment sheet under noise spectrum, operational voltage level and corresponding operational voltage level
The noise intensity of body present position.
The security header of the installation of live-working safety prior-warning device or the operating personnel for being integrated in livewire work scene
On helmet or clothes outer surface.
A kind of live-working safety method for early warning based on equipment noise identification, is made an uproar using the present embodiment is above-mentioned based on equipment
The live-working safety prior-warning device of sound identification, includes the following steps:
Step (1) utilizes the equipment operating noise at sound pick-up acquisition electric operating scene；
Step (2), analog signal processing circuit handles the equipment operating noise at collected electric operating scene, to put
Big signal amplitude simultaneously filters out high-frequency harmonic noise, obtains analog audio signal, and later, analog to digital conversion circuit is by analog signal processing
Analog audio signal after processing of circuit is converted to digital audio and video signals；
Step (3), master controller carry out discrete Fourier transform processing to digital audio and video signals using fft algorithm, obtain number
The noise intensity of noise spectrum and different frequency ingredient in audio signalI；
Step (4), the different electricity that master controller will be saved in the noise spectrum and memory in the digital audio and video signals of acquisition
The operating noise property data base of distinct device under grade is pressed to carry out Frequency spectrum ratio pair, so that it is determined that the type and operating voltage of equipment
Grade；
Step (5), main controller read the correspondence work electricity saved in the operating noise property data base saved in memory
Press the noise intensity of apparatus body present position under gradeI 0 , and the strength retrogression's formula propagated in air according to sound wave
The spacing calculated between operating personnel and equipment is
Step (6), when the spacing between staff and equipment is less than the safe spacing threshold value saved in memory, master control
Device control buzzer processed and alarm lamp work, realize and prompt the safe early warning of staff.
Application example
As shown in Figure 1, a kind of live-working safety prior-warning device based on equipment noise identification, including sound pick-up 1, analog signal
Processing circuit 2, analog to digital conversion circuit 3, master controller 4, memory 5, buzzer 6, alarm lamp 7, power module 8 and battery
9；
The sound pick-up 1, analog signal processing circuit 2, analog to digital conversion circuit 3, master controller 4 are linked in sequence；
Battery 9 is connected with power module 8；
Power module 8 respectively with analog signal processing circuit 2, analog to digital conversion circuit 3, master controller 4, memory 5, buzzer 6,
Alarm lamp 7 is connected；
Master controller 4 is also connected with memory 5, buzzer 6, alarm lamp 7 respectively；
Sound pick-up 1 is used to acquire the equipment operating noise at electric operating scene；
Analog signal processing circuit 2 is used to handle the equipment operating noise at 1 collected electric operating scene of sound pick-up,
With amplified signal amplitude and high-frequency harmonic noise is filtered out, obtains analog audio signal；
Analog to digital conversion circuit 3 is used for treated analog audio signal the is converted to digital audio letter of analog signal processing circuit 2
Number；
Memory 5 is used to save the operating noise characteristic and safe spacing threshold value of distinct device under different voltages grade；
Master controller 4 for the digital audio and video signals that analog to digital conversion circuit 3 transmits are analyzed and processed and with 5 memory of memory
The operating noise characteristic of distinct device compares under the different voltages grade of storage, according to the realization pair of the spectrum signature of noise
Device type, operational voltage level judgement and calculate spacing between operating personnel and equipment, when spacing be lower than 5 memory of memory
When the corresponding safe spacing threshold value of storage, buzzer and alarm lamp work alarm are controlled；
Power module 8 for being converted to the voltage of battery 9, be suitble to analog signal processing circuit 2, analog to digital conversion circuit 3,
Master controller 4, memory 5, buzzer 6, alarm lamp 7 for operating voltage demand.
Analog signal processing circuit 2 is made of amplifying circuit and filter circuit, and circuit diagram is as shown in Figure 2.Analog-to-digital conversion
The circuit diagram of circuit 3 is as shown in Figure 3.
Master controller 4 uses technical grade microcontroller, and dominant frequency is not less than 100MHz, and operating temperature lower limit is not higher than -40 DEG C,
The operating temperature upper limit is not less than+85 DEG C.
Memory 5 is using EEPROM, FLASH or FRAM type storage chip as storage medium.
Operating noise characteristic includes equipment sheet under noise spectrum, operational voltage level and corresponding operational voltage level
The noise intensity of body present position.
The security header of the installation of live-working safety prior-warning device or the operating personnel for being integrated in livewire work scene
On helmet or clothes outer surface.
A kind of live-working safety method for early warning based on equipment noise identification is based on equipment noise using this example is above-mentioned
The live-working safety prior-warning device of identification, includes the following steps:
Step (1) utilizes the equipment operating noise at sound pick-up acquisition electric operating scene；
Step (2), analog signal processing circuit handles the equipment operating noise at collected electric operating scene, to put
Big signal amplitude simultaneously filters out high-frequency harmonic noise, obtains analog audio signal, and later, analog to digital conversion circuit is by analog signal processing
Analog audio signal after processing of circuit is converted to digital audio and video signals；
Step (3), master controller carry out discrete Fourier transform processing to digital audio and video signals using fft algorithm, obtain number
The noise intensity of noise spectrum and different frequency ingredient in audio signalI；
Step (4), the different electricity that master controller will be saved in the noise spectrum and memory in the digital audio and video signals of acquisition
The operating noise property data base of distinct device under grade is pressed to carry out Frequency spectrum ratio pair, so that it is determined that the type and operating voltage of equipment
Grade；
Step (5), main controller read the correspondence work electricity saved in the operating noise property data base saved in memory
Press the noise intensity of apparatus body present position under gradeI 0 , and the strength retrogression's formula propagated in air according to sound wave ---, calculate the spacing between operating personnel and equipment；
Step (6), when the spacing between staff and equipment is less than the safe spacing threshold value saved in memory, master control
Device control buzzer processed and alarm lamp work, realize and prompt the safe early warning of staff.
Equipment under the different voltages grade safe spacing threshold value that do not have a power failure is as shown in table 1 below.
Table 1
The basic principles, main features and advantages of the present invention have been shown and described above.The technical staff of the industry
It should be appreciated that the present invention is not limited to the above embodiments, the above embodiments and description only describe the present invention
Principle, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these variation and
Improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent
Object defines.
Claims (8)
1. a kind of live-working safety prior-warning device based on equipment noise identification, it is characterised in that: including sound pick-up (1), mould
Quasi- signal processing circuit (2), analog to digital conversion circuit (3), master controller (4), memory (5), buzzer (6), alarm lamp
(7), power module (8) and battery (9)；
The sound pick-up (1), analog signal processing circuit (2), analog to digital conversion circuit (3), master controller (4) are linked in sequence；
Battery (9) is connected with power module (8)；
Power module (8) respectively with analog signal processing circuit (2), analog to digital conversion circuit (3), master controller (4), memory
(5), buzzer (6), alarm lamp (7) are connected；
Master controller (4) is also connected with memory (5), buzzer (6), alarm lamp (7) respectively；
Sound pick-up (1) is used to acquire the equipment operating noise at electric operating scene；
Analog signal processing circuit (2) is used to carry out the equipment operating noise at the collected electric operating scene of sound pick-up (1)
Processing, with amplified signal amplitude and filters out high-frequency harmonic noise, obtains analog audio signal；
Analog to digital conversion circuit (3) is used for that treated that analog audio signal is converted to digital sound by analog signal processing circuit (2)
Frequency signal；
Memory (5) is used to save the operating noise characteristic and safe spacing threshold value of distinct device under different voltages grade；
Master controller (4) is used to be analyzed and processed the digital audio and video signals that analog to digital conversion circuit (3) transmits and and memory
(5) the operating noise characteristic of distinct device compares under the different voltages grade stored in, special according to the frequency spectrum of noise
Levies in kind now simultaneously calculates spacing between operating personnel and equipment to the judgement of device type, operational voltage level, deposits when spacing is lower than
When the corresponding safe spacing threshold value stored in reservoir (5), buzzer and alarm lamp work alarm are controlled；
Power module (8) is for converting the voltage of battery (9), to be suitble to analog signal processing circuit (2), analog-to-digital conversion
Circuit (3), master controller (4), memory (5), buzzer (6), alarm lamp (7) for operating voltage demand.
2. the live-working safety prior-warning device according to claim 1 based on equipment noise identification, it is characterised in that: mould
Quasi- signal processing circuit (2) are made of amplifying circuit and filter circuit.
3. the live-working safety prior-warning device according to claim 1 based on equipment noise identification, it is characterised in that: main
Controller (4) uses technical grade microcontroller, and dominant frequency is not less than 100MHz, and operating temperature lower limit is not higher than -40 DEG C, operating temperature
The upper limit is not less than+85 DEG C.
4. the live-working safety prior-warning device according to claim 1 based on equipment noise identification, it is characterised in that: deposit
Reservoir (5) is using EEPROM, FLASH or FRAM type storage chip as storage medium.
5. the live-working safety prior-warning device according to claim 1 based on equipment noise identification, it is characterised in that: work
Making feature of noise data includes apparatus body present position under noise spectrum, operational voltage level and corresponding operational voltage level
Noise intensity.
6. the live-working safety prior-warning device according to claim 1 based on equipment noise identification, it is characterised in that: institute
The live-working safety prior-warning device stated is installed or is integrated in outside the crash helmet or clothes of operating personnel at livewire work scene
On surface.
7. a kind of live-working safety method for early warning based on equipment noise identification, using described in claim 1 ~ 6 any one
Based on equipment noise identification live-working safety prior-warning device, which comprises the steps of:
Step (1) utilizes the equipment operating noise at sound pick-up acquisition electric operating scene；
Step (2), analog signal processing circuit handles the equipment operating noise at collected electric operating scene, to put
Big signal amplitude simultaneously filters out high-frequency harmonic noise, obtains analog audio signal, and later, analog to digital conversion circuit is by analog signal processing
Analog audio signal after processing of circuit is converted to digital audio and video signals；
Step (3), master controller is analyzed and processed digital audio and video signals, obtain digital audio and video signals in noise spectrum and
The noise intensity of different frequency ingredient；
Step (4), the different electricity that master controller will be saved in the noise spectrum and memory in the digital audio and video signals of acquisition
The operating noise property data base of distinct device under grade is pressed to carry out Frequency spectrum ratio pair, so that it is determined that the type and operating voltage of equipment
Grade；
Step (5), main controller read the correspondence work electricity saved in the operating noise property data base saved in memory
The noise intensity of apparatus body present position under grade, and the strength retrogression's formula propagated in air according to sound wave are pressed, is calculated
Spacing between operating personnel and equipment；
Step (6), when the spacing between staff and equipment is less than the safe spacing threshold value saved in memory, master control
Device control buzzer processed and alarm lamp work, realize and prompt the safe early warning of staff.
8. the live-working safety method for early warning according to claim 7 based on equipment noise identification, which is characterized in that step
Suddenly in (3), it is discrete to digital audio and video signals progress using fft algorithm that master controller, which is analyzed and processed digital audio and video signals,
Fourier transformation processing.
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| CN110823473A (en) * | 2019-11-05 | 2020-02-21 | 浙江和达科技股份有限公司 | Noise monitor and monitoring method thereof |
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