CN107991666A - Pedestrian warns sound warning distance test device and test method - Google Patents
Pedestrian warns sound warning distance test device and test method Download PDFInfo
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- CN107991666A CN107991666A CN201711222709.6A CN201711222709A CN107991666A CN 107991666 A CN107991666 A CN 107991666A CN 201711222709 A CN201711222709 A CN 201711222709A CN 107991666 A CN107991666 A CN 107991666A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
- G01S11/14—Systems for determining distance or velocity not using reflection or reradiation using ultrasonic, sonic, or infrasonic waves
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Abstract
Pedestrian warns sound warning distance test device and test method, and the pedestrian for being related to electric automobile and hybrid vehicle warns sound warning effect technical field of measurement and test, and the present invention can carry out the warning distance test of multiple background noise environments in a test site.Including infrared laser receiving sensor and Infrared laser emission device, reception of wireless signals sensor and wireless signal transmission remote control, acoustic sensor, for synchronous acquisition reception of wireless signals sensor information, acoustic sensor information, the data acquisition equipment of vehicle speed sensor information and infrared laser receiving sensor information, in one end of test site and positioned at vehicle front both sides, infrared laser receiving sensor and Infrared laser emission device are set respectively, tester is located at the other end of test site, the side of tester sets acoustic sensor and loudspeaker, tester is equipped with wireless signal transmission remote control；The distance between infrared laser receiving sensor and tester are vehicle into linear distance.
Description
Technical field
The present invention relates to the pedestrian of electric automobile and hybrid vehicle to warn sound warning effect technical field of measurement and test, tool
Body is related to a kind of pedestrian and warns sound warning distance test device and test method.
Background technology
As the problems such as environmental pollution, energy crisis becomes increasingly conspicuous, new-energy automobile technology is increasingly taken seriously, each vapour
Che companies release electric automobile (Electric Vehicle, EV) and hybrid vehicle (Hybrid Electric one after another
Vehicle, HEV) product, it has also become automobile industry current research hot spot and future thrust.
In the range of the HEV of EV or electric-only mode is 0-30km/h in speed when driving, due to no engine
(HEV engines do not work), the horizontal pass-by noise for being far below orthodox car under identical operating mode of its pass-by noise are horizontal.This
In the case of, the missing of engine noise and the tyre noise of low amplitude value, cause pedestrian can not by sound outside car this very
Important information judges the transport condition of automobile, this is easier to cause friendship for the disadvantaged group such as blind person, old man and children
Interpreter's event.For this reason, relevant criterion is actively drafted by national governments and standardization body, it is desirable to which the new-energy automobile such as EV, HEV must pacify
Fill pedestrian and warn audio system, to make up the security risk that the missing of engine sound is brought to pedestrian.
At present, automobile industry to pedestrian warn sound warning effect requirement, mainly with it is relevant country and organize drafting of
Warning sound standard based on, using the lowest noise limit value requirement row at the uniform velocity travelled under the speeds such as 10km/h, 20km/h, reversing
People warns the warning effect of sound.Using A weighteds sound pressure level as evaluating, often ignore the subjective feeling and reality of people
Influence of the Background environmental noise to warning effect.
It is a kind of sense of reality of reflection people more directly perceived that pedestrian, which warns the warning distance of sound, and takes into full account background ring
The objective parameter of border influence of noise.However, the test dress of sound warning distance is not warned dedicated for pedestrian currently on the market
Put.
The content of the invention
The present invention for solve existing pedestrian warn sound the object of the present invention is to provide a kind of pedestrian warn sound warning away from
, can be in the warning distance test of the multiple background noise environments of test site progress from test device and test method.
Pedestrian warns sound warning distance test device, is included in test site and sets for catching the vehicle inlet wire moment
Infrared laser receiving sensor and Infrared laser emission device, for catch warning the moment reception of wireless signals sensor and
Wireless signal transmission remote control, for the acoustic sensor of acquisition noise data, passes for synchronous acquisition reception of wireless signals
Sensor information, acoustic sensor information, the data acquisition equipment of vehicle speed sensor information and infrared laser receiving sensor information
And for playing the loudspeaker of background noise environment sound；The vehicle speed sensor, which is arranged on vehicle, to be used to monitor vehicle car
Fast information；In one end of test site and positioned at vehicle front both sides, infrared laser receiving sensor and infrared laser are set respectively
Emitter, tester are located at the other end of test site, and the side of the tester sets acoustic sensor and loudspeaker, institute
State tester and be equipped with wireless signal transmission remote control；The distance between the infrared laser receiving sensor and tester are car
Into linear distance.
Pedestrian warns sound warning distance test method, and this method is realized by following steps：
Step 1: starting vehicle, automobile gear level is placed in D grades, runs at a low speed and sends pedestrian's warning sound, the speed passes
Sensor stabilization makes vehicle at the uniform velocity travel into test site in 10km/h；
Step 2: when vehicle front end covers the laser rays signal that the Infrared laser emission device is sent, it is described red
Outer laser pick-off sensor output 6V d. c. voltage signals to the data acquisition equipment, the registration of vehicle inlet wire moment is denoted as t0,
Vehicle continues to move forward, and when tester hears that pedestrian warns sound, presses wireless signal transmission remote control, described wireless
Signal receiving sensor exports 6V direct currents square wave voltage signal to the data acquisition equipment, and record tester hears that pedestrian warns
T is denoted as at the time of sound1, acoustic sensor, the infrared laser receive sensing described in the data acquisition equipment synchronous recording
The signal of device and the reception of wireless signals sensor；
Step 3: setting loudspeaker to send the ambient noise of varying environment, repeat step one and step 2, completion pedestrian warn
Show the test of sound warning distance.
Beneficial effects of the present invention：The pedestrian of the present invention warns sound warning distance test device to be recorded with accurate and effective
Vehicle inlet wire moment and warning pedestrian's moment, ensure accuracy of the warning apart from result of calculation.Different rings are played using loudspeaker
Border background sound, the pedestrian that different background noise circumstance can be completed in a place warn the test of sound warning distance, keep away
Exempt from the experiment preparation of multiple real background environment, improve testing efficiency.Acoustic sensor is able to record whole test
During tester position sound change, be conducive to analyze pedestrian warn sound when playing warning effect sound frequency component and
The change of amplitude.For the present invention by warning distance to be capable of the warning effect of objective measure pedestrian warning sound, accuracy is high, practical
Property it is strong, can effectively instruct electric automobile and hybrid electric vehicle people to warn sound exploitation.
Brief description of the drawings
Fig. 1 is the test site schematic diagram that pedestrian of the present invention warns sound warning distance test device；
Fig. 2 is the functional block diagram that pedestrian of the present invention warns sound warning distance test device；
Fig. 3 warns sound to warn environmental background noise in distance test method to test sensor for pedestrian of the present invention
Arrange schematic diagram；
Fig. 4 warns sound to warn environmental background noise loudspeaker arrangement in distance test method for pedestrian of the present invention
Schematic diagram.
Embodiment
Embodiment one, illustrate present embodiment with reference to Fig. 1 to Fig. 4, and pedestrian warns sound warning distance test dress
Put, including for catch the vehicle inlet wire moment infrared laser receiving sensor 1 and Infrared laser emission device 2, for catching
The reception of wireless signals sensor 3 and wireless signal transmission remote control 4 at moment are warned, the acoustics for acquisition noise data passes
Sensor 5, is able to record the change of whole test procedure test person position pedestrian's alarming sound voice frequency and amplitude, for monitoring vehicle
The vehicle speed sensor 6 of speed information, for the data acquisition equipment 7 of all channel informations of synchronous recording, further includes for playing
The loudspeaker 8 of background noise environment sound, the pedestrian that different background noise circumstance can be completed in a place warn sound police
Show the test of distance.Time and noise data after collection are transported to data acquisition equipment, are transmitted to by cable in computer
Complete data storage.In one end of test site and positioned at vehicle front both sides, 1 He of infrared laser receiving sensor is set respectively
Infrared laser emission device 2, tester are located at the other end of test site, near the tester, set acoustic sensor 5
With loudspeaker 8, the tester is equipped with wireless signal transmission remote control 4；The infrared laser receiving sensor 1 and tester
The distance between be vehicle into linear distance.
Embodiment two, illustrate present embodiment with reference to Fig. 1 to Fig. 4, and present embodiment is using specific embodiment party
Pedestrian described in formula one warns the method that sound warning distance test device is tested, and mainly includes test site and prepares step
Suddenly sensor and equipment preparation process, data collection steps, warning, are tested apart from calculation procedure.
1st, test site prepares；It is in the spacious test site of peace and quiet of horizontal smooth bituminous paving on ground, builds long extremely
The two-way traffic of few 30m, width 10m or so grow straight region, simulation actual travel road surface.
2nd, test sensor and equipment prepares；Vehicle is in road low order end position, and tester faces left side and stands in roadside,
Eyes are muffled with eyeshade, are equipped with a wireless signal transmission remote control 4.5 He of acoustic sensor is arranged on the left of tester
Loudspeaker 8, vertical direction is apart from ground 1.2m, in 1 He of road right end vehicle front location arrangements infrared laser receiving sensor
Infrared laser emission device 2, the distance between the device and tester are into linear distance, are represented with y, on vehicle.By acoustics
Sensor 5, reception of wireless signals sensor 3, infrared laser signal receiving sensor 1, vehicle speed sensor 6 and data acquisition equipment
7 connections.
3rd, data acquisition.The step includes such as lower part：
First, vehicle is started, automobile gear level is placed in D grades, and electric automobile (or under hybrid power car electric-only mode) is low
Speed traveling sends pedestrian and warns sound, and slowly stepping on the throttle pedal and is stabilized to a certain gas pedal aperture, makes vehicle with 10km/
The speed of h at the uniform velocity travels；
2nd, tester is ready in precalculated position, and vehicle is at the uniform velocity travelled with the speed of 10km/h to be surveyed into warning distance
Region is tried, when vehicle front end covers the laser rays signal that Infrared laser emission device 2 is sent, trigger data acquisition equipment note
Record inlet wire moment t0, vehicle continues to move forward, and when tester hears that goers outside vehicle warns sound, presses wireless signal transmission
Remote control, record lower tester hear t at the time of pedestrian warns sound1, 7 synchronous recording of data acquisition equipment entirely tested
Journey acoustic sensor and speed signal, repeat at least 5 times experiment processes；
3rd, several ambient noise signals are gathered, to simulate the ambient noise under varying environment in test site.Classical ring
Border includes：Parking lot, school's doorway road and noisy urban road, according to shown in Fig. 2 in the plane parallel with level ground
Arrange three acoustic sensors 5, three acoustic sensors are in the equilateral triangle that the length of side is 2m, and vertical direction is apart from ground
1.2m, three acoustic sensors are connected with data acquisition equipment 7, test these three environmental background noises, acquisition time respectively
Not less than 300s；
4th, the ambient noise signal for three acoustic microphone picks for being arranged in above-mentioned environment is converted into audio format text
Part, selects the preferable loudspeaker of frequency response curve in these three ambient noise primary frequency ranges, to ensure that loudspeaker is particularly low
The actual play effect of frequency scope；Audio file is imported into computer, the sound playout software of triple channel can be played simultaneously in use
Three audio files are played simultaneously, according to Fig. 3 acoustic sensors position arrange loudspeaker, and by three audio files according to
It is secondary that loop play is synchronized by the loudspeaker identical with acoustic sensor locations.In Fig. 4 equilateral triangles center cloth
Put acoustic sensor 5, adjust 8 sound size of loudspeaker so that acoustic sensor 5 test obtained A weighteds sound pressure level, 1/3 times
Sound interval frequency spectrum is consistent with 5 test result of acoustic sensor in Fig. 3.Parking lot, school's doorway road are respectively completed according to the step
Tested with noisy urban road.Sound evaluation is warned so as to which simulation test person carries out pedestrian under the background noise environment of parking lot；
5th, the school's doorway road environment sound and noisy urban road ambient sound that loop play step 3 is tested respectively
Sound, test job is completed by above step.
6th, warning is apart from calculation procedure：For the test result under each background noise environment, by vehicle inlet wire moment t0
With t at the time of warning pedestrianiIt recorded in table 1, table 1 warns sound warning apart from computational chart for pedestrian, when calculating reaction respectively
Between, averagely drawn average reaction time Δ tave, pedestrian under each background noise environment is calculated according to formula (1) respectively and is warned
Show the warning distance x of sound：
X=y-v Δs tave (1)
Wherein y is into linear distance, and v is speed of operation (during 10km/h, v=2.78m/s).
The function of each sensor described in present embodiment is as follows：
Infrared laser receiving sensor 1 is mainly used for receiving the laser rays signal that sends of Infrared laser emission device, when connecing
When receiving signal, infrared laser receiving sensor keeps 0V d. c. voltage signals to export to data acquisition equipment, when there is object screening
When firmly laser rays signal make it that laser pick-off sensor does not receive laser signal, laser pick-off sensor output 6V DC voltages
Signal is to data acquisition equipment；
Reception of wireless signals sensor 3 is mainly used for receiving the signal sent from wireless signal transmission remote control, when
When pressing trigger button and unclamping rapidly, reception of wireless signals sensor receives signal, produces the 6V direct current square waves of short time
Voltage signal, and export to data acquisition equipment；Acoustic sensor 5 is used for the noise signal for recording whole test process；Speed
Sensor 6 is used to monitor whole test process speed signal.
Table 1
Claims (7)
1. pedestrian warns sound warning distance test device, it is characterized in that；It is included in test site to set and is used to catch vehicle
The infrared laser receiving sensor (1) and Infrared laser emission device (2) at inlet wire moment, for catching the wireless communication at warning moment
Number receiving sensor (3) and wireless signal transmission remote control (4), for the acoustic sensor (5) of acquisition noise data, are used for
Synchronous acquisition reception of wireless signals sensor (3) information, acoustic sensor (5) information, vehicle speed sensor (6) information and it is infrared swash
The data acquisition equipment (7) of optical receiving sensor (1) information and the loudspeaker (8) for playing background noise environment sound；
In one end of test site and positioned at vehicle front both sides, infrared laser receiving sensor (1) and infrared laser are set respectively
Emitter (2), tester are located at the other end of test site, and the side of the tester sets acoustic sensor (5) and raises
Sound device (8), the tester are equipped with wireless signal transmission remote control (4)；The infrared laser receiving sensor (1) and test
The distance between person is vehicle into linear distance.
2. pedestrian according to claim 1 warns sound warning distance test device, it is characterised in that the acoustics sensor
Device (5) is apart from ground 1.2m.
3. pedestrian according to claim 1 warns the test method of sound warning distance test device, it is characterized in that, the party
Method is realized by following steps：
Step 1: starting vehicle, automobile gear level is placed in D grades, runs at a low speed and sends pedestrian's warning sound, the vehicle speed sensor
(6) stablize makes vehicle at the uniform velocity travel into test site in 10km/h；
Step 2: when vehicle front end covers the laser rays signal that the Infrared laser emission device (2) sends, it is described infrared
Laser pick-off sensor (1) output 6V d. c. voltage signals to the data acquisition equipment (7), the registration of vehicle inlet wire moment is denoted as
t0, vehicle continues to move forward, and when tester hears that pedestrian warns sound, presses wireless signal transmission remote control (4), institute
State reception of wireless signals sensor (3) and export 6V direct currents square wave voltage signal to the data acquisition equipment (7), record tester
Hear and be denoted as t at the time of pedestrian warns sound1, acoustic sensor (5), institute described in data acquisition equipment (7) synchronous recording
State the signal of infrared laser receiving sensor (1) and the reception of wireless signals sensor (3)；
Step 3: setting loudspeaker (8) to send the ambient noise of varying environment, repeat step one and step 2, completion pedestrian warn
Show the test of sound warning distance.
4. test method according to claim 3, it is characterised in that；The ambient noise of varying environment includes parking lot, learns
School gate road and the noise of noisy urban road, arrange three acoustic sensors (5) in the plane parallel with level ground,
In the equilateral triangle that the length of side is 2m, vertical direction is set apart from ground 1.2m, three acoustic sensors (5) with the data acquisition
Standby 7 connection, tests three kinds of environmental background noises, acquisition time is more than or equal to 300s respectively.
5. test method according to claim 3, it is characterised in that；Three sonic transducers of three kinds of environment will be arranged in
The ambient noise signal of collection is converted into audio format file, and audio file is imported into computer, using triple channel is played simultaneously
Sound playout software three audio files are played simultaneously,
Loudspeaker is arranged according to the position of acoustic sensor, and three audio files are passed sequentially through and acoustic sensor position
Put identical loudspeaker and synchronize loop play.
6. test method according to claim 3, it is characterised in that；Three are arranged in the plane parallel with level ground
Loudspeaker (8), in the equilateral triangle that the length of side is 2m, arranges the acoustic sensor (5) in equilateral triangle center, adjusts
The sound size of the whole loudspeaker (8), makes acoustic sensor (5) test obtained A weighteds sound pressure level, third-octave frequency spectrum
It is consistent with the result using three acoustic sensor (5) tests, complete parking lot, school's doorway road and noisy urban road
Test.
7. test method according to claim 3, it is characterised in that；Warning distance calculating method be：Make an uproar to each background
Test result under acoustic environment, registration of vehicle inlet wire moment t0T at the time of hearing that pedestrian warns sound with tester1, calculate respectively
The reaction time of multiple test result, and calculate average reaction time Δ tave；
Calculate the warning distance x of pedestrian's alarming sound sound under each background noise environment respectively according to the following formula：
X=y-v Δs tave
Y is that v is Vehicle Speed into linear distance in formula.
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