CN103293007B - A kind of agricultural vehicle performance detection method and detecting instrument thereof - Google Patents
A kind of agricultural vehicle performance detection method and detecting instrument thereof Download PDFInfo
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Abstract
<b> the present invention relates to a kind of agricultural vehicle performance detection method and detecting instrument thereof, in the more smooth linear section of selection as the road section of examination, tested agricultural vehicle is first parked in road examination section, in one end of road examination section, just a high-frequency signal transmitter and a receiver are settled to the headstock of tested agricultural vehicle or the tailstock, when tested agricultural vehicle and transmitter transmit direction in the same way or reverse start to travel time, namely high-frequency signal transmitter and receiver operation is opened, constantly at the uniform velocity travelling, braking is slided until stop the tested agricultural vehicle emission of high frequency signals travelled, simultaneously receive by receiver the signal that tested agricultural vehicle is reflected back, and the reflected signal that receiver receives constantly is sent to time synchronisation system, calculated by computing system, then show, record, and be applied to a kind of agricultural vehicle brake performance detector device of above-mentioned detection method, detection efficiency is high and accuracy of detection is also higher.</b>
Description
Technical field
the present invention relates to a kind of detection method and detecting instrument thereof of agricultural vehicle aspect of performance.
Background technology
the detection of agricultural vehicle aspect of performance, comprise braking, axle weight, rotating speed, power etc., wherein the quality of braking ability is a more crucial index, and in vehicle braking performances context of detection, also has many instrument and equipments, the method of inspection has road to try method and stand method, its Road examination method rapid and convenient more, uses commonplace, specifies according to GB7258-1997, road examination method mainly detects automobile brake perfrmance on road, and its parameter detected has braking distance, the average retardation rate fully sent, brake pedal force, the brake coordination time etc., if publication number is the portable braking force tester for car of 1710393, it has two-way reinforcing bar, two-way reinforcing bar is connected to rigidity force transmission shaft, rigidity force transmission shaft upper end is fixed with instrument panel, lower end is connected with wheel hub cover plate, wheel hub cover plate is distributed with sipes and narrow groove, sliding sleeve is provided with in groove, sliding sleeve to be connected with wheel hub cover plate through narrow groove by bolt by its lug thus to realize the location of optional position, test effect is better, range of application is larger, but, need the location and installation of carrying out parts in the position of automotive hub, not only operation steps increases, the instability of installing also may cause test result deviation excessive, also some brake performance detector generally used is sensor installation on vehicle body mostly, operation and maintenance is more difficult, the Chinese utility model patent being 202420870U as notification number discloses a kind of automobile portable brake performance tester, it comprises single machine unit and detecting signal unit, detecting signal unit provides detection signal for single machine unit, detecting signal unit comprises separate acceleration transducer, pedal force sensor and foot pedal sensor, this kind of tester and motor vehicles without any electric and mechanical Hard link, so when braking starts to be judged by the output of software according to sensor, thus determine collection and the storage of data, facilitate data processing, but this kind of testing tool sensitivity requirement is high, and the refresh rate of acceleration transducer is high not enough, higher also just can only reach HZ up to a hundred, also just the data volume of representative sampling is on the low side, analog simulation degree is high not enough, the data precision detected need to improve, thus, existing testing tool is in batch detection or accurate detection, efficiency is lower, measuring accuracy is on the low side, and when the ground such as field are tested because many restriction practical operations such as environment get up there will be more problem, the agricultural vehicle of various can not be met in rural area, the ground tests such as field.
Summary of the invention
the present invention is the shortcoming solving prior art, and provides a kind of detection efficiency high and the agricultural vehicle performance detection method that precision is high and detecting instrument thereof.
technical scheme of the present invention is: a, select more smooth linear section as the road section of examination, tested agricultural vehicle is first parked in road examination section, in one end of road examination section, just a high-frequency signal transmitter and a receiver are settled to the headstock of tested agricultural vehicle or the tailstock, when tested agricultural vehicle and transmitter transmit direction in the same way or reverse start to travel time, namely high-frequency signal transmitter and receiver operation is opened, constantly at the uniform velocity travelling, braking is slided until stop the tested agricultural vehicle emission of high frequency signals travelled, simultaneously receive by receiver the signal that tested agricultural vehicle is reflected back, and the reflected signal that receiver receives constantly is sent to time synchronisation system,
when b, high-frequency signal transmitter send first pulse signal, just begin through timekeeping system and carry out timing, and each pulse signal is recorded as a minimum signal traveling time from being transmitted into receive, and obtains Δ t
1
, Δ t
2
Δ t
n
, the computing system that can be connected with by timekeeping system calculates the travel distance s of each pulse signal
1
, s
2
s
n
, s
n
=C* Δ t
n
, C is the speed of signal itself, and can pass through each signal travel distance s
1
, s
2
s
n
calculate the normal pitch distance values D under each signaling point of agricultural vehicle
1
, D
2
d
n
, D
n
=s
n
/ 2, suppose that again the burst length of high-frequency signal transmitter is T, i.e. the interval time of each signal is also each normal pitch distance values D certainly
1
, D
2
d
n
interval time, then can calculate the standard speed v under each signaling point of agricultural vehicle
1
, v
2
v
n
, v
n
=│ D
n
-D
n-1
│/T, the instantaneous velocity as agricultural vehicle is recorded;
c, computing system carry out graphic modeling, and figure and data are shown by display device, after arriving braking before can seeing an agricultural vehicle braking, until the curve of the velocity variations of the whole process stopped, i.e. driving process and moderating process, by the manipulation to computing system, choose required data, comprise from v
1
, v
2
v
n
choose initial speed of braking v, normal pitch distance values D
1
, D
2
d
n
and the corresponding time etc., carry out computing again, according to GB7258-1997, the computing formula of the average retardation rate (MFDD) fully sent is as follows:
MFDD=（v
b
2
-v
e
2
）/[25.92（s
e
-s
b
）]；
in formula, v
b
for 0.8v tests the speed of a motor vehicle, v
e
for 0.1v tests the speed of a motor vehicle, S
b
for the test speed of a motor vehicle is from v to v
b
operating range, S
e
for the test speed of a motor vehicle is from v to v
e
operating range, pass through v
b
and v
e
can convert and obtain corresponding to the time point of this speed, just can obtain the normal pitch distance values of this correspondence time, and S
b
and S
e
be respectively normal pitch distance values and the v of v corresponding time
b
the normal pitch distance values of the difference of the normal pitch distance values of corresponding time and v corresponding time and v
e
the difference of the normal pitch distance values of corresponding time, by inputting the physical parameter of agricultural vehicle, can also be converted into damping force F, F=MFDD*m-f, m are agricultural vehicle quality, and f is extraneous constant resistance.
compared with existing detecting instrument and method, it adopts car to detect outward, with motor vehicles also without any electric and mechanical Hard link, make testing process convenient more flexibly, very be applicable to field, the ground such as rural area, batch detection can also be carried out, and by the detection of high-frequency signal, make the data volume that collects very many, make the emulator of agricultural vehicle whole service process very high, namely accuracy of detection is quite high, the process of normal driving process and retarding braking can also be observed very intuitively, most importantly in addition braking deceleration can also be detected, the significant datas such as damping force.
as preferably, high-frequency signal transmitter is generating laser.
as preferably, before detecting, at the headstock of tested agricultural vehicle or the tailstock, one piece of reflector is installed.In agricultural vehicle, such as tractor etc., because the shape of its headstock, the tailstock is smooth not, if adopt the signals such as laser to detect, the signal of reflection there will be and not receive or the problem such as reflected signal deviation is excessive thus affect testing result, therefore, fills the reflector that lastblock is smooth, the impact of signal on testing result can be effectively reduced, thus ensure higher accuracy of detection.
as preferably, the reflective membrane that reflector comprises magnetic rubber board and fits with magnetic rubber board.This preferred convenient operation, because the headstock of agricultural vehicle, the tailstock are steely, this kind of reflector can directly be adsorbed on headstock or the tailstock.
be applied to a kind of agricultural vehicle brake performance detector device of above-mentioned detection method, comprise support and rack-mount detection case, generating laser is provided with in detection case, laser pickoff and the miniature data processor be connected with generating laser, also clocking processor is provided with in detection case, the data input pin of clocking processor is connected with laser pickoff with generating laser, the data output end of clocking processor is connected with miniature data processor, the data input pin of miniature data processor is connected with guidance panel, the output terminal of miniature data processor is also connected with display device.
compared with the detecting instrument equipment of existing vehicle, this device volume is smaller, be easy to carry, use also very flexible, only need this device just can detect efficiently on field and other places different automobile types, large batch of agricultural vehicle, and tested vehicle does not need detection component is installed; On the other hand, due to the feature of agricultural vehicle itself, build is relatively wide, weight is relatively heavier, travel speed is slow, and braking procedure is than very fast, so the detection method of employing laser pulsed, the error produced is very little, its degree of accuracy can be ensured, and can be presented in face of testing staff by display device intuitively rapidly, also facilitate record.
as preferably, detection case is provided with the contraposition calibrating device for adjusting detecting instrument position.Because the detection of agricultural vehicle often appears at rural area or field, add that vehicle own is wider, affect the visual angle of testing staff, when locating pick-up unit, the direction to the car being not easy to realize Laser emission direction and agricultural vehicle remains essentially on same direction, therefore be easy to occur deflection, cause the comparatively big error detecting data, the effect of contraposition calibrating device just effectively can reduce metrical error.
as preferably, contraposition calibrating device has Image-forming instrument, and Image-forming instrument is with photosensitive eyeglass and its minute surface is vertical with the transmit direction of generating laser.When Image-forming instrument presents be the orthographic view of agricultural vehicle time, just can easily judge whether that contraposition is accurate.
as preferably, support and detection case are rotationally connected.Be convenient to the accurate contraposition of detection case, position adjustment need not be carried out to whole detecting instrument, handled easily again.
as preferably, generating laser is high frequency lasers transmitter.Because agricultural vehicle speed is slow, and braking procedure is than comparatively fast, if will simulate its braking procedure, then needs very many data collection points, therefore needs could be measured more accurately by the generating laser of high frequency.
as preferably, support is provided with adjustable feet.Be convenient to the position adjustments of whole detecting instrument, to adapt to different environment and vehicle.
in sum, the present invention has the following advantages:
1, small electronic equipment is adopted, volume is little, be easy to carry, can meet different automobile types, large batch of agricultural vehicle in the wild, the ground such as rural area carries out the test of high-efficiency high-accuracy, whole braking procedure and various data can also be presented in addition very intuitively, be also convenient to record;
2, structure is simple, with low cost.
Accompanying drawing explanation
fig. 1 is the perspective view of the embodiment of the present invention one;
fig. 2 is the inside connection layout of detection case in the embodiment of the present invention one;
fig. 3 is the perspective view of the embodiment of the present invention two.
in figure, 1, support, 2, detection case, 21, generating laser, 22, laser pickoff, 3, miniature data processor, 4, clocking processor, 31, guidance panel, 32, display device, 5, contraposition calibrating device, 51, photosensitive eyeglass.
Embodiment
following specific embodiment is only explanation of the invention; it is not limitation of the present invention; those skilled in the art can make to the present embodiment the amendment not having creative contribution as required after reading this instructions, as long as but be all subject to the protection of Patent Law in right of the present invention.
embodiment one:
as shown in Figure 1, 2, a kind of agricultural vehicle performance detection method, comprises the following steps:
a, select more smooth linear section as the road section of examination, tested agricultural vehicle is first parked in road examination section, in one end of road examination section, just a high-frequency signal transmitter and a receiver are settled to the headstock of tested agricultural vehicle or the tailstock, when tested agricultural vehicle and transmitter transmit direction in the same way or reverse start to travel time, namely high-frequency signal transmitter and receiver operation is opened, constantly at the uniform velocity travelling, braking is slided until stop the tested agricultural vehicle emission of high frequency signals travelled, simultaneously receive by receiver the signal that tested agricultural vehicle is reflected back, and the reflected signal that receiver receives constantly is sent to time synchronisation system,
when b, high-frequency signal transmitter send first pulse signal, just begin through timekeeping system and carry out timing, and each pulse signal is recorded as a minimum signal traveling time from being transmitted into receive, and obtains Δ t
1
, Δ t
2
Δ t
n
, the computing system that can be connected with by timekeeping system calculates the travel distance s of each pulse signal
1
, s
2
s
n
, s
n
=C* Δ t
n
, C is the speed of signal itself, and can pass through each signal travel distance s
1
, s
2
s
n
calculate the normal pitch distance values D under each signaling point of agricultural vehicle
1
, D
2
d
n
, D
n
=s
n
/ 2, suppose that again the burst length of high-frequency signal transmitter is T, i.e. the interval time of each signal is also each normal pitch distance values D certainly
1
, D
2
d
n
interval time, then can calculate the standard speed v under each signaling point of agricultural vehicle
1
, v
2
v
n
, v
n
=│ D
n
-D
n-1
│/T, the instantaneous velocity as agricultural vehicle is recorded;
c, computing system carry out graphic modeling, and figure and data are shown by display device 32, after arriving braking before can seeing an agricultural vehicle braking, until the curve of the velocity variations of the whole process stopped, i.e. driving process and moderating process, by the manipulation to computing system, choose required data, comprise from v
1
, v
2
v
n
choose initial speed of braking v, normal pitch distance values D
1
, D
2
d
n
and the corresponding time etc., carry out computing again, according to GB7258-1997, the computing formula of the average retardation rate (MFDD) fully sent is as follows:
MFDD=（v
b
2
-v
e
2
）/[25.92（s
e
-s
b
）]；
in formula, v
b
for 0.8v tests the speed of a motor vehicle, v
e
for 0.1v tests the speed of a motor vehicle, S
b
for the test speed of a motor vehicle is from v to v
b
operating range, S
e
for the test speed of a motor vehicle is from v to v
e
operating range, pass through v
b
and v
e
can convert and obtain corresponding to the time point of this speed, just can obtain the normal pitch distance values of this correspondence time, and S
b
and S
e
be respectively normal pitch distance values and the v of v corresponding time
b
the normal pitch distance values of the difference of the normal pitch distance values of corresponding time and v corresponding time and v
e
the difference of the normal pitch distance values of corresponding time, by inputting the physical parameter of agricultural vehicle, can also be converted into damping force F, F=MFDD*m-f, m are agricultural vehicle quality, and f is extraneous constant resistance.
high-frequency signal transmitter is generating laser, at the headstock of tested agricultural vehicle or the tailstock, one piece of reflector is installed before detecting, if high-frequency signal transmitter is just detecting headstock, reflector is just arranged on headstock, if high-frequency signal transmitter is just detecting the tailstock, reflector is just arranged on the tailstock, the reflective membrane that reflector comprises magnetic rubber board and fits with magnetic rubber board.
be applied to a kind of agricultural vehicle brake performance detector device of above-mentioned detection method, the detection case 2 comprising support 1 and be arranged on support 1, generating laser 21 is provided with in detection case 2, laser pickoff 22 and the miniature data processor 3 be connected with generating laser 21, clocking processor 4 is also provided with in detection case 2, the data input pin of clocking processor 4 is connected with laser pickoff 22 with generating laser 21, the data output end of clocking processor 4 is connected with miniature data processor 3, the data input pin of miniature data processor 3 is connected with guidance panel 31, the output terminal of miniature data processor 3 is also connected with display device 32.Support 1 and detection case 2 are rotationally connected.Generating laser 21 is high frequency lasers transmitter.Support 1 is provided with adjustable feet.Generating laser 21 uses as high-frequency signal transmitter, laser pickoff 22 uses as receiver, clocking processor 4 completes the operations such as all timing for the time, record as a timekeeping system, and miniature data processor 3 is a cpu, comprises computing system and control system.
embodiment two:
as shown in Figure 3, the difference of itself and embodiment 1 is: in detecting instrument, detection case 2 is provided with the contraposition calibrating device 5 for adjusting detecting instrument position, contraposition calibrating device 5 has Image-forming instrument, and Image-forming instrument is with photosensitive eyeglass 51 and its minute surface is vertical with the transmit direction of generating laser 21.
detect early stage, when testing staff lays detecting instrument, the position of detecting instrument is calibrated by contraposition calibrating device 5, what make Image-forming instrument presents is the orthographic view of agricultural vehicle, to ensure laser direction that in detecting instrument, generating laser 21 sends vector and the direction vector conllinear of the traveling of tested agricultural vehicle, improve accuracy of detection.
Claims (4)
1. an agricultural vehicle performance detection method, is characterized in that: comprise the following steps:
A, select more smooth linear section as the road section of examination, tested agricultural vehicle is first parked in road examination section, in one end of road examination section, just a high-frequency signal transmitter and a receiver are settled to the headstock of tested agricultural vehicle or the tailstock, when tested agricultural vehicle and transmitter transmit direction in the same way or reverse start to travel time, namely high-frequency signal transmitter and receiver operation is opened, constantly at the uniform velocity travelling, braking is slided until stop the tested agricultural vehicle emission of high frequency signals travelled, simultaneously receive by receiver the signal that tested agricultural vehicle is reflected back, and the reflected signal that receiver receives constantly is sent to time synchronisation system,
When b, high-frequency signal transmitter send first pulse signal, just begin through timekeeping system and carry out timing, and each pulse signal is recorded as a minimum signal traveling time from being transmitted into receive, and obtains Δ t
1, Δ t
2Δ t
n, the computing system that can be connected with by timekeeping system calculates the travel distance s of each pulse signal
1, s
2s
n, s
n=C* Δ t
n, C is the speed of signal itself, and can pass through each signal travel distance s
1, s
2s
ncalculate the normal pitch distance values D under each signaling point of agricultural vehicle
1, D
2d
n, D
n=s
n/ 2, suppose that again the burst length of high-frequency signal transmitter is T, i.e. the interval time of each signal is also each normal pitch distance values D certainly
1, D
2d
ninterval time, then can calculate the standard speed v under each signaling point of agricultural vehicle
1, v
2v
n, v
n=│ D
n-D
n-1│/T, the instantaneous velocity as agricultural vehicle is recorded;
C, computing system carry out graphic modeling, and figure and data are shown by display device, after arriving braking before can seeing an agricultural vehicle braking, until the curve of the velocity variations of the whole process stopped, i.e. driving process and moderating process, by the manipulation to computing system, choose required data, comprise from v
1, v
2v
nchoose initial speed of braking v, normal pitch distance values D
1, D
2d
nand the corresponding time etc., carry out computing again, according to GB7258-1997, the computing formula of the average retardation rate MFDD fully sent is as follows:
MFDD=（v
b 2-v
e 2）/[25.92（s
e-s
b）]；
In formula, v
bfor 0.8v tests the speed of a motor vehicle, v
efor 0.1v tests the speed of a motor vehicle, S
bfor the test speed of a motor vehicle is from v to v
boperating range, S
efor the test speed of a motor vehicle is from v to v
eoperating range, pass through v
band v
ecan convert and obtain corresponding to the time point of this speed, just can obtain the normal pitch distance values of this correspondence time, and S
band S
ebe respectively normal pitch distance values and the v of v corresponding time
bthe normal pitch distance values of the difference of the normal pitch distance values of corresponding time and v corresponding time and v
ethe difference of the normal pitch distance values of corresponding time, by inputting the physical parameter of agricultural vehicle, can also be converted into damping force F, F=MFDD*m-f, m are agricultural vehicle quality, and f is extraneous constant resistance,
Wherein, described high-frequency signal transmitter is generating laser, at the headstock of tested agricultural vehicle or the tailstock, one piece of reflector is installed before detecting, the reflective membrane that described reflector comprises magnetic rubber board and fits with described magnetic rubber board, a kind of detecting instrument is also applied: comprise support (1) and be arranged on the detection case (2) on described support (1) in whole testing procedure, described generating laser (21) is provided with in described detection case (2), laser pickoff (22) and the miniature data processor (3) be connected with described generating laser (21), clocking processor (4) is also provided with in described detection case (2), the data input pin of described clocking processor (4) is connected with described laser pickoff (22) with described generating laser (21), the data output end of described clocking processor (4) is connected with described miniature data processor (3), the data input pin of described miniature data processor (3) is connected with guidance panel (31), the output terminal of described miniature data processor (3) is also connected with display device (32), described detection case (2) is provided with the contraposition calibrating device (5) for adjusting detecting instrument position.
2. a kind of agricultural vehicle performance detection method according to claim 1, it is characterized in that: described contraposition calibrating device (5) has Image-forming instrument, Image-forming instrument is with photosensitive eyeglass (51) and its minute surface is vertical with the transmit direction of described generating laser (21).
3. a kind of agricultural vehicle performance detection method according to claim 2, is characterized in that: described support (1) and described detection case (2) are rotationally connected.
4. a kind of agricultural vehicle performance detection method according to claim 1 or 2 or 3, is characterized in that: described support (1) is provided with adjustable feet.
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|---|---|---|---|
| CN201310230640.7A CN103293007B (en) | 2013-06-09 | 2013-06-09 | A kind of agricultural vehicle performance detection method and detecting instrument thereof |
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|---|---|---|---|
| CN201310230640.7A CN103293007B (en) | 2013-06-09 | 2013-06-09 | A kind of agricultural vehicle performance detection method and detecting instrument thereof |
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| CN103293007A CN103293007A (en) | 2013-09-11 |
| CN103293007B true CN103293007B (en) | 2016-01-20 |
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| CN110082127A (en) * | 2019-05-13 | 2019-08-02 | 奇瑞新能源汽车技术有限公司 | A kind of electric car test exchange method and system |
| CN114942448A (en) * | 2022-07-21 | 2022-08-26 | 北谷电子有限公司 | Test system and test method for braking distance of self-walking aerial work platform |
| CN115791206B (en) * | 2022-12-15 | 2023-06-16 | 湖州金博电子技术有限公司 | Tractor motor performance detection device and detection method thereof |
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