CN210605791U - Driving performance evaluation system for sound quality in vehicle - Google Patents
Driving performance evaluation system for sound quality in vehicle Download PDFInfo
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- CN210605791U CN210605791U CN201921979111.6U CN201921979111U CN210605791U CN 210605791 U CN210605791 U CN 210605791U CN 201921979111 U CN201921979111 U CN 201921979111U CN 210605791 U CN210605791 U CN 210605791U
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Abstract
The utility model discloses a driving performance evaluation system of sound quality in car, only look at the appraiser psychology for overcoming the evaluation of sound quality in the current car, to the problem that sound environment influences no reaction on the driving performance in the car, the driving performance evaluation system of sound quality in the car includes main control unit (1), antenna (2), camera (5) and photoelectric type turn to sensing (8); the main control unit (1) comprises a GPS module (3), a video AD module chip (6) and a DSP chip (9); the output end OUT of the antenna (2) arranged at the center console of the vehicle to be tested is electrically connected with the RF _ IN pin of the GPS module (3); the CVBS interface of the camera (5) arranged at the center of the upper edge of the front windshield of the vehicle to be tested is electrically connected with the CVBS pin of the video AD module chip (6); the photoelectric steering sensor (8) is electrically connected with GPI01 and GPI02 pins of the DSP chip (9).
Description
Technical Field
The utility model relates to a sound quality evaluation device of sound environment to vehicle driving performance influence in the car, more exactly, the utility model relates to a driving performance evaluation system of sound quality in the car.
Background
The acoustic quality refers to the suitability of sound in a specific technical goal or task connotation, which has been studied in europe at the end of the 20 th century, mainly from the point of view of human subjective perception, by using psychoacoustic methods to study the characteristics of noise. The acoustic environment inside the vehicle is an important research content in the vehicle environment, influences human feelings and is a component of the comfort of the vehicle; the driving operation of the robot by people is also influenced, and the safety of the automobile is concerned. Therefore, the evaluation research of the sound quality in the vehicle is proposed and developed into an important research direction in the vehicle engineering discipline.
In the conventional research, the evaluation of the quality of the car interior sound is generally performed from both subjective evaluation and objective evaluation. The subjective evaluation of sound quality is the most direct reflection of the in-vehicle evaluator on the subjective psychological feeling of sound, but the subjective evaluation is influenced by the evaluation experience of the evaluator, psychophysiological factors, the surrounding environment and other factors, which is time-consuming, labor-consuming and uncertain. The objective evaluation of sound quality adopts the psychoacoustic parameters such as loudness, sharpness, roughness, jitter, AI index, sound scheduling and speech definition to objectively quantify the sound quality, comparatively speaking, the objective evaluation has the advantages of rapidness, convenience, good stability, no influence of subjective factors of evaluators, and the disadvantage that the accuracy, reliability and comprehensiveness of the objective quantitative description are difficult to ensure.
The research focuses of the two methods are that the sound environment in the vehicle has psychological influence on the evaluators, and the effect of the sound environment on the driving task completion condition of the driver, namely the driving performance cannot be directly reflected. The driver is the only operator of the vehicle, the importance and the criticality of the driving performance of the driver determine that the evaluation of the quality of the sound in the vehicle is a more direct and reasonable mode by focusing on the influence of the sound environment in the vehicle on the driving performance of the driver.
Disclosure of Invention
The utility model aims to solve the technical problem that it only focuses on evaluator psychoesthesia to have overcome prior art and have sound quality evaluation in the car, to the sound environment influence on the driving performance in the car problem that does not have direct reaction, provides a driving performance evaluation system of sound quality in the car.
In order to solve the technical problem, the utility model discloses an adopt following technical scheme to realize:
the driving performance evaluation system of the sound quality in the vehicle comprises a main control unit, an antenna, a camera and a photoelectric steering sensor;
the main control unit comprises a GPS module with the model of SKG12Q, a video AD module chip with the model of SAA7111H and a DSP chip with the model of TMS320F 28335;
the antenna is a GPS measurement type antenna, the antenna is arranged at a console of a tested vehicle, and an output end OUT of the antenna is electrically connected with an RF _ IN pin of a GPS module with the model number of SKG 12Q;
the CVBS interface of the camera arranged at the center of the upper edge of the front windshield of the tested vehicle is electrically connected with the CVBS pin of the video AD module chip with the model of SAA 7111H;
and two output pins of the photoelectric steering sensor arranged on the steering column tube are electrically connected with GPI01 and GPI02 pins of a DSP chip of the model TMS320F 28335.
The main control unit in the technical scheme also comprises an RS232 serial port conversion chip with the model of MAX232, a video AD module chip with the model of SAA7111H, a synchronous FIFO chip with the model of AL422B and a CPLD chip with the model of XC9536XLVQ 44;
the input end RXD0 of the GPS module is electrically connected with a DOUT pin of the RS232 serial port conversion chip, the output end TXD0 of the GPS module is electrically connected with a DIN pin of the RS232 serial port conversion chip, and a TXD pin and an RXD pin of the RS232 serial port conversion chip and a SCIRXDA pin and an SCIRXDA pin of the chip are electrically connected;
VPO0, VPO1, VPO2, VPO3, VPO4, VPO5, VPO6 and VPO7 output pins of a video AD module chip with the model of SAA7111H are electrically connected with DIO0, DIO1, DIO2, DIO3, DIO4, DIO5, DIO6 and DIO7 input pins of a synchronous FIFO chip with the model of AL422B, the output pin of the synchronous FIFO chip with the model of AL422B is electrically connected with a FIFO interface of a DSP chip with the model of TMS320F28335, the pins 40, 41, 42 and 43 of a CPLD chip with the model of XC9536XLVQ44 are electrically connected with VS, HS, RTSO and LL of a video AD module chip with the model of SAA7111H2The pins C are respectively and electrically connected, the pins 2, 3, 5, 6, 7, 27, 28, 29, 30, 31, 32, 33 and 34 of the CPLD chip with model XC9536XLVQ44 are respectively and electrically connected with the pins WRST, WE, RRST, RE, RCK, DO0, DO1, DO2, DO3, DO4, DO5, DO6 and DO7 of the synchronous FIFO chip with model AL422B, and the pin WCK of the synchronous FIFO chip with model AL422B is respectively and electrically connected with the pin LL of the video AD module chip with model SAA7111H2The pin C is connected with the pin 43 of a CPLD chip with the model number XC9536XLVQ 44.
Compared with the prior art, the beneficial effects of the utility model are that:
1. in-vehicle sound quality evaluation method among prior art does not generally directly reflect in-vehicle sound environment to the effect of driving the performance, and driving performance evaluation system of in-vehicle sound quality can follow the driving performance angle and describe the in-vehicle sound quality more directly perceivedly, provide an evaluation system and method for not coming the interior sound quality research.
2. The driving performance evaluation system and method of sound quality in the car provide the driving performance evaluation measurement index of sound quality: vehicle longitudinal control indicators (speed, headway), vehicle lateral control indicators (lane keeping, steering wheel measurements) and event detection capability indicators (number of false responses, response time).
Drawings
The invention will be further described with reference to the accompanying drawings:
fig. 1 is a schematic block diagram of the structural principle of the driving performance evaluation system for the sound quality in the vehicle according to the present invention;
fig. 2 is a schematic view of lane keeping, which is a positional relationship between a vehicle and a center line of a lane used in the method for evaluating driving performance of vehicle interior sound quality according to the present invention;
fig. 3 is a block flow diagram of the driving performance evaluation method for the sound quality in the vehicle according to the present invention;
in the figure: 1. the system comprises a main control unit, 2, an antenna, 3, a GPS module, 4, an RS232 serial port conversion chip, 5, a camera, 6, a video AD module chip, 7, a synchronous FIFO chip, 8, a photoelectric steering sensor, 9, a DSP chip, 10, a CPLD chip, 11, an image view field obtained by the camera, 12, a camera position, 13, a vehicle center line (namely an image center line), 14, a lane left side line, 15, lane widths s and 16 in the image, a lane center line, 17, distances from the vehicle center line (namely the image center line) to the lane center line i and 18, a lane right side line;
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings:
a driving performance evaluation system for in-vehicle sound quality:
referring to fig. 1, the driving performance evaluation system of the sound quality in the vehicle of the present invention includes a main control unit 1, an antenna 2, a camera 5, and a photoelectric steering sensor 8;
the main control unit 1 consists of a GPS module 3 with the model number of SKG12Q, an RS232 serial port conversion chip 4 with the model number of MAX232, a video AD module chip 6 with the model number of SAA7111H, a synchronous FIFO chip 7 with the model number of AL422B, a DSP chip 9 with the model number of TMS320F28335 and a CPLD chip 10 with the model number of XC9536XLVQ 44;
the GPS module 3 with the model number of SKG12Q uses a chip conforming to AEC-Q100 standard and comprises 24 pins; the module can analyze satellite data to obtain longitude and latitude corresponding to the position of the vehicle;
the RS232 serial port conversion chip 4 with the model of MAX232 comprises a charge pump circuit consisting of 6 pins and 4 capacitors and 2 data channels consisting of 8 pins; the RS232 serial port conversion chip 4 can transmit longitude and latitude data obtained by the GPS module 3 to the DSP chip 9;
the video AD module chip 6 with model SAA7111H comprises analog processing and analog-to-digital conversion circuit, chrominance signal processing circuit, luminance, contrast, saturation control circuit, conversion and output mode control circuit, analog processing control circuit, luminance signal processing circuit, and I2C bus control, I2The system comprises a bus interface C, a boundary scan test control circuit, a synchronous signal separation circuit and a clock generation power-on control circuit; the video AD module chip 6 can carry out video coding and decoding on the image;
the synchronous FIFO chip 7 with the model AL422B comprises a write data register, a 384 x 8 storage cell array, a read data register, a write address register, a read address register, a clock generator, an address refresh counter and 28 pins; the synchronous FIFO chip 7 performs FIFO buffering on the video data;
the DSP chip 9 with the model of TMS320F28335 comprises a 32-bit floating-point CPU core and a general input/output interface; the DSP chip 9 performs digital signal processing to obtain vehicle speed, distance information between vehicles, lane keeping information and steering wheel angle information of the tested vehicle;
the CPLD chip 10 with the model number of XC9536XLVQ44 consists of programmable logic macro units (MC, MacroCell) surrounding a programmable interconnection matrix unit at the center; the CPLD chip 10 is capable of transmitting a code into a target chip;
the chips contained in the main control unit 1 are distributed at a center console of the vehicle to be tested;
the antenna 2 is a GPS measurement type antenna, and the antenna 2 is used for receiving data transmitted by a satellite and is arranged at a center console of the vehicle to be tested;
referring to fig. 2, the camera 5 is a wired camera of an automobile, and during an experiment, the camera 5 shoots a road marking image of a tested vehicle and is arranged at the center of the upper edge of a front windshield of the tested vehicle;
the photoelectric steering sensor 8 consists of a transmitter, a receiver and a detection circuit and is used for detecting the rotating direction and the rotating angle of the steering wheel, and the photoelectric steering sensor 8 is arranged on the steering column tube;
an output end OUT of the antenna 2 is electrically connected with an RF _ IN pin of the GPS module 3, an input end RXD0 of the GPS module 3 is electrically connected with a DOUT pin of the RS232 serial port conversion chip 4, an output end TXD0 of the GPS module 3 is electrically connected with a DIN pin of the RS232 serial port conversion chip 4, and a TXD pin and an RXD pin of the RS232 serial port conversion chip 4 and a SCIRXDA pin of the chip 9 are electrically connected; during the experiment, a vehicle to be tested runs in front of the vehicle to be tested, the antenna 2 transmits received data transmitted by a satellite to the GPS module 3, the GPS module analyzes the data to obtain corresponding longitude and latitude, then the data is sent to the DSP chip 9 with the model of TMS320F28335 through the RS232 serial port conversion chip 4, and vehicle speed information and vehicle distance information are converted by utilizing the vehicle longitude and latitude position information.
The CVBS interface of the camera 5 is electrically connected to CVBS pin of video AD module chip 6 with model SAA7111H, VPO0, VPO1, VPO2, VPO3, VPO4, VPO5, VPO6, VPO7 output pin of video AD module chip 6 with model SAA7111H is electrically connected to DIO0, DIO1, DIO2, DIO3, DIO4, DIO5, DIO6, DIO7 input pin of synchronization FIFO chip 7 with model AL422B, output pin of synchronization chip 7 with model AL422B is electrically connected to FIFO interface in DSP chip 9 with model TMS320F28335, 40, 41, 42, 43 pin of CPLD chip 10 with model XC9536XLVQ44 is electrically connected to VS 6, so, HS module LL, rtds 3, rths, vsq 44 with model SAA7111H2The pins C are respectively and electrically connected, the pins 2, 3, 5, 6, 7, 27, 28, 29, 30, 31, 32, 33 and 34 of the CPLD chip 10 with model XC9536 XLVVQ 44 are respectively and electrically connected with the pins WRST, WE, RRST, RE, RCK, DO0, DO1, DO2, DO3, DO4, DO5, DO6 and DO7 of the synchronous FIFO chip 7 with model AL422B, and the pin WCK of the synchronous FIFO chip 7 with model AL422B is respectively and electrically connected with the pins LL 7111H of the video AD module chip 6 with model SAA7111H2The pin C is connected with a pin 43 of a CPLD chip 10 with the model number of XC9536XLVQ 44; the camera 5 collects road marking images, and video coding and decoding are carried out through the video AD module chip 6And performing FIFO buffering by the over-synchronization FIFO chip 7, finally transmitting the FIFO buffering to the DSP chip 9 with the model of TMS320F28335, and converting the lane keeping information by the DSP chip 9 with the model of TMS320F28335 by using the image information.
Two output pins of the photoelectric steering sensor 8 are electrically connected with GPI01 and GPI02 pins of a DSP chip 9 of the model TMS320F28335, the angle of the steering wheel is measured by the photoelectric steering sensor 8, the measured data is transmitted to the DSP chip 9, and the angle information of the steering wheel of the tested vehicle is obtained.
Referring to fig. 3, the method for evaluating the driving performance of the sound quality in the vehicle according to the present invention comprises the following steps:
1. selecting an experimental environment:
the test conditions meet the acoustic conditions, meteorological conditions and test road conditions of GB/T18697-2002 Acoustic-automobile in-vehicle noise measurement method:
1) the sound radiated from the automobile is required to become a part of the noise inside the automobile only by reflection from the road surface, but not by reflection from a building, a wall, or a similar large object outside the automobile; therefore, the distance between the car and such large objects should be more than 20 meters during the measurement;
2) the temperature outside the car must be between-5 ℃ and 35 ℃ and the wind speed must not exceed 5 meters per second at a height of about 1.2 meters along the measurement route;
3) the road section to be tested should be a hard road surface, which must be as smooth as possible without joints, bumps or similar surface structures, otherwise the sound pressure level inside the vehicle would be increased; the surface of the road must be dry, must not have snow, dirt, stone, leaf, etc.;
2. road condition design:
the method comprises 3 road conditions, namely a flat and wide express way with clear marked lines, a crowded road section in a city and a street with a plurality of traffic light intersections;
1) flat broad sharp freeway:
the road is 1km long, four lanes are bidirectional, the width of each lane is 3.75 meters, no pedestrian exists, a green belt is arranged in the middle, and no other vehicle exists on the road;
2) urban congested road sections:
the road length is 1km, the straight-going has no traffic lights, four lanes in two directions, the width of each lane is 3.75 meters, and the traffic flow is 2300 vehicles/hour;
3) street with multiple traffic intersections:
the road length is 13km, the bidirectional three lanes are provided, the width of each lane is 3.75 meters, a traffic light intersection is arranged every 1 km-2 km, and the traffic flow is 600 vehicles/hour;
3. the driver selects:
selecting 40 drivers for carrying out a driving test, wherein 27 male drivers and 13 female drivers in the drivers all obtain driving qualification according to the proportion of male drivers and female drivers in China, the driving age is 2-7 years, the age of the drivers is 20-50 years old, the drivers are in physical and mental health, have no visual and auditory disorders, and do not drink wine and take medicines; the personnel composition needs to consider covering different regions, occupations, sexes, ages, cultural backgrounds, living habits and the like as far as possible;
4. grouping driving:
1) preheating driving:
preheating for 2 times before formal driving, being familiar with road environment, and keeping the interval between two driving processes for avoiding fatigue for 20 minutes;
2) the driving test is divided into two groups of non-noise contrast measurement and noise measurement;
the noise-free contrast measurement is carried out for 1 time by the tested driver under each road condition, and the driver wears the sound insulation ear bags to isolate the noise in the vehicle during driving;
the noise measurement is carried out for 1 time by a tested driver under each road condition, and the driver takes off the sound insulation ear bag during driving and is directly exposed in the noise in the vehicle; the non-noise contrast measurement and the noise measurement are carried out alternately by two groups of drivers;
in each measurement, the record indexes of the DSP chip 9 with the model of TMS320F28335 comprise vehicle longitudinal control indexes (comprising speed and distance between vehicles), vehicle transverse control indexes (comprising lane keeping and steering wheel angle measurement) and event detection capability indexes (error reaction times);
(1) vehicle longitudinal control index:
a. speed: the vehicle running speed is an important index influencing the traffic safety level, when a driver drives in a distracted way, the driving speed and the accelerator control of the driver have greater variability, and the vehicle speed is measured by a vehicle speed and vehicle position measuring unit;
the vehicle speed obtaining process comprises the following steps: the antenna 2 transmits the received data transmitted by the satellite to the GPS module 3, the GPS module analyzes the data to obtain corresponding longitude and latitude, and then the data is transmitted to the DSP chip 9 with the model of TMS320F28335 through the RS232 serial port conversion chip 4, and the DSP chip 9 with the model of TMS320F28335 converts the longitude and latitude of the vehicle at a certain moment and 1s later into Gaussian coordinates (Xq, Yq), (Xh, Yh) respectively; then, the distance of 1s automobile running is obtained by solving a formula of the distance between two points, and the vehicle speed is obtained by dividing the distance by 1s
In the formula: xq is the x value of the Gaussian coordinate converted from the longitude and latitude of the automobile at a certain moment, Yq is the y value of the Gaussian coordinate converted from the longitude and latitude of the automobile at the same moment, Xh is the x value of the Gaussian coordinate converted from the longitude and latitude of the automobile after 1s, and Yh is the y value of the Gaussian coordinate converted from the longitude and latitude of the automobile after 1 s;
b. the distance between vehicles is as follows: the inter-vehicle distance is used for evaluating whether the sensitivity of a tested driver to the acceleration and deceleration of a front vehicle is influenced under the noise in the vehicle, the speed of the vehicle to be tested is changed and runs near a certain specific value, the tested driver needs to drive the vehicle to keep the necessary inter-vehicle distance to run, and the inter-vehicle distance is obtained by calculating after the information of the vehicle to be tested and the position to be tested is measured by a vehicle speed and vehicle position measuring unit;
the vehicle distance information obtaining process: the DSP chip 9 with the model of TMS320F28335 converts the longitude and latitude of the front vehicle and the rear vehicle into Gaussian coordinates (Xf, Yf), (Xr, Yr); then, the distance between the two vehicles is obtained by solving a distance formula between the two points
In the formula: xf is the x value of the Gaussian coordinate converted from the longitude and latitude of a certain moment of the front vehicle, Yf is the y value of the Gaussian coordinate converted from the longitude and latitude of the certain moment of the front vehicle, Xr is the x value of the Gaussian coordinate converted from the longitude and latitude of the certain moment of the rear vehicle, and Yr is the y value of the Gaussian coordinate converted from the longitude and latitude of the certain moment of the rear vehicle;
the Gaussian coordinate x value and the Gaussian coordinate y value are as follows:
x＝X0 B+Ntm0 2/2+(5-t2+9η2+4η4)Ntm0 4/24+(61-58t2+t4)Ntm0 6/720
y＝Nm0+(1-t2+η2)Nm0 3/6+(5-18t2+t4+14η2-58η2t2)Nm0 5/120
in the formula: x0 B＝C0B-cosB(C1sinB+C2sin3B+C3sin5B)；t＝tanB；l＝L-L0；m0＝lcosB；N＝α/(1-e2sin2B)1/2；η2＝e2cosB; l, B is longitude and latitude coordinates before conversion; x and y are transformed Gaussian coordinates; l0 is the central meridian coordinate of the projection zone; c0、C1、C2、C3Is a constant that is independent of the point location and only dependent on the ellipsoid parameters.
(2) Vehicle lateral control index:
a. lane keeping: the lane keeping or transverse position refers to the position relation between the center line of the vehicle and the center line of the used lane, and is used for evaluating the middle keeping capability of the tested driver between the road signs of the left and right sides under the noise in the vehicle; in the experiment, a camera 4 arranged at the center of the upper edge of a front windshield collects road marking images, the road marking images are transmitted to a DSP chip 9 of TMS320F28335 through video coding and decoding and FIFO buffering, and lane keeping information, namely the actual distance L between a vehicle center line and a lane center line, is converted by the DSP chip 9 of the TMS320F28335 through image information;
the lane keeping information obtaining process: the method comprises the steps that a camera 5 arranged at the center of the upper edge of a front windshield collects a road marking image in an experiment, as shown in fig. 2, the camera 5 is located at the center of the upper edge of the windshield, a vehicle center line in an image obtained by the camera 5 is just located at the center of an image visual field, the actual width of a lane is d, the width of the lane in the image is s, the distance between the vehicle center line (namely the image center line) and the lane center line in the image is i, the actual distance between the vehicle center line and the lane center line is L, the image is subjected to video coding and decoding through a video AD module chip 6, FIFO buffering is performed through a synchronous FIFO chip 7, and finally the image is transmitted to a DSP chip 9 with the model of TMS320F28335, and lane keeping information is converted by the DSP chip 9 with the model of TMS320F28335 through image information, namely L/d/id/s can be obtained;
b. steering wheel angle measurement: in the study of driving distraction and workload load, the movement of a steering wheel is generally considered as an index for load assessment, the measurement mode is a steering wheel angle mark, an angle sensor is used for calculating the movement angle of the steering wheel each time, a driver can finely adjust the position of a lane kept by the steering wheel under the normal driving condition, and when the driving performance is reduced, the driver can often make some large-amplitude adjustments on steering to correct the position of the lane.
The angle of the steering wheel is measured by a photoelectric steering sensor 8, the photoelectric steering sensor 8 is connected with a DSP chip 9 with the model of TMS320F28335, and the angle information of the steering wheel can be obtained by the DSP chip 9 with the model of TMS320F 28335;
(3) event detectability index:
number of false reactions (number of traffic light violations):
measuring the number of traffic light violation times of a street with a plurality of traffic light intersections and requiring testers to record the number of traffic light violations from the side;
5. and (3) obtaining a result:
comparing the non-noise comparison measurement group with the noise measurement group to obtain a driving performance evaluation result of the sound quality in the vehicle;
1) data arrangement is carried out, the average value of each data in each group of experiments is respectively calculated, and a table is drawn
Standard deviation of speed:
taking the speed of a driver at a random 10 position of the expressway, calculating the standard deviation of the speed at the 10 position to reflect the speed variation of the driver, averaging the standard deviations of the speeds of the drivers in each group, and SsdRepresenting the mean velocity standard deviation, NS, of a noise-free control measurement groupsdRepresents the mean velocity standard deviation of the noisy measurement set;
standard deviation of distance between vehicles:
taking the inter-vehicle distance of 10 crowded road sections of drivers, calculating the standard deviation of the inter-vehicle distance of 10 crowded road sections, averaging the standard deviations of the inter-vehicle distances of the drivers in each group, and TfyMean standard deviation of inter-vehicle distance, NT, representing a noise-free control measurement groupfyRepresents the mean standard deviation of the inter-vehicle distances of the noisy measurement set;
lane position standard deviation:
randomly taking the distance between the center line of the vehicle and the center line of the driving lane when 10 drivers drive on the express way, obtaining the standard deviation of the distance at 10 positions, averaging the standard deviations of the distances of the drivers by each group, and ScwRepresenting the mean lane position standard deviation, NS, of a noise-free control measurement groupcwRepresenting the standard deviation of the average lane position of the noisy measurement group;
steering wheel angle standard deviation:
randomly taking the moving angle of the steering wheel of 10 drivers when the drivers drive on the express way, obtaining the standard deviation of 10 angles, averaging the standard deviation of the steering angle of each driver by each group, SfzRepresenting average steering wheel angle standard deviation, NS, of a noise-free control measurement groupfzRepresenting the average steering wheel angle standard deviation of the noisy measurement set;
number of false reactions:
the error reaction times, i.e. the number of traffic light violation times, and the average value of the number of traffic light violation times of each group of drivers, NcfRepresenting a noise-free control measurement panelNumber of violations of traffic lights, NNcfRepresenting the average traffic light violation times of the noisy measurement group;
the percentage change rate of a certain driving performance evaluation index is as follows:
the driving performance evaluation indexes comprise a speed standard deviation, a workshop distance standard deviation, a lane position standard deviation, a steering wheel corner standard deviation and error reaction times;
2) the total index of the driving performance evaluation is the sum of the percentage change rate of each driving performance index
Total index sigma lambda for evaluating driving performanceEvaluation index＝[(Ssd-NSsd)/Ssd+(Tfy-NTfy)/Tfy+(Scw-NScw)/Scw+ (Sfz-NSfz)/Sfz+(Ncf-NNcf)/Ncf]×100％
The total index is 0, which indicates that the noise has no influence on the driving performance;
the total index is negative, which indicates that the noise has bad influence on the driving performance, and the larger the absolute value of the total index is, the worse the influence of the noise on the driving performance is;
the overall indicator is indicating that noise has a good effect on the driving performance, and the larger the overall indicator is, the better the noise has an effect on the driving performance.
Claims (2)
1. The driving performance evaluation system for the sound quality in the vehicle is characterized by comprising a main control unit (1), an antenna (2), a camera (5) and a photoelectric steering sensor (8);
the main control unit (1) comprises a GPS module (3) with the model of SKG12Q, a video AD module chip (6) with the model of SAA7111H and a DSP chip (9) with the model of TMS320F 28335;
the antenna (2) is a GPS measurement type antenna, the antenna (2) is arranged at a console of the vehicle to be tested, and an output end OUT of the antenna (2) is electrically connected with an RF _ IN pin of a GPS module (3) with the model number of SKG 12Q;
the CVBS interface of the camera (5) is electrically connected with a CVBS pin of a video AD module chip (6) with the model SAA 7111H;
two output pins of the photoelectric steering sensor (8) arranged on the steering column tube are electrically connected with GPI01 and GPI02 pins of a DSP chip (9) of the model TMS320F 28335.
2. The driving performance evaluation system of sound quality in a vehicle according to claim 1, characterized in that said master control unit (1) further comprises an RS232 serial port conversion chip (4) of type MAX232, a video AD module chip (6) of type SAA7111H, a synchronization FIFO chip (7) of type AL422B, a CPLD chip (10) of type XC9536XLVQ 44;
an input end RXD0 of the GPS module (3) is electrically connected with a DOUT pin of the RS232 serial port conversion chip (4), an output end TXD0 of the GPS module (3) is electrically connected with a DIN pin of the RS232 serial port conversion chip (4), a TXD pin and an RXD pin of the RS232 serial port conversion chip (4) and an SCIRXDA pin of the chip (9) are electrically connected; VPO0, VPO1, VPO2, VPO3, VPO4, VPO5, VPO6 and VPO7 output pins of a video AD module chip (6) with model SAA7111H are electrically connected with DIO0, DIO1, DIO2, DIO3, DIO4, DIO5, DIO6 and DIO7 input pins of a synchronization FIFO chip (7) with model AL422B, output pins of the synchronization FIFO chip (7) with model AL422B are electrically connected with FIFO interface of a DSP chip (9) with model TMS320F28335, pins 40, 41, 42 and 43 of a CPLD chip (10) with model XC9536XLVQ44 are electrically connected with VS, HS, RTSO, RTLL, VS and 43 pins of the video AD chip (6) with model SAA7111H2The pins C are respectively and electrically connected, the pins 2, 3, 5, 6, 7, 27, 28, 29, 30, 31, 32, 33 and 34 of the CPLD chip (10) with the model XC9536XLVQ44 are respectively and electrically connected with the pins WRST, WE, RRST, RE, RCK, DO0, DO1, DO2, DO3, DO4, DO5, DO6 and DO7 of the synchronous FIFO chip (7) with the model AL422B, the pin WCK of the synchronous FIFO chip (7) with the model AL422B is respectively and electrically connected with the pin LL of the video AD module chip (6) with the model SAA7111H2The C pin is connected with a 43 pin of a CPLD chip (10) with the model of XC9536XLVQ44。
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| CN110648087A (en) * | 2019-11-15 | 2020-01-03 | 吉林大学 | Driving performance evaluation method and system for sound quality in vehicle |
| CN110648087B (en) * | 2019-11-15 | 2024-06-25 | 吉林大学 | Method and system for evaluating driving performance of sound quality in vehicle |
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