CN103335850A - Bicycle start braking performance test device - Google Patents
Bicycle start braking performance test device Download PDFInfo
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- CN103335850A CN103335850A CN2013102147561A CN201310214756A CN103335850A CN 103335850 A CN103335850 A CN 103335850A CN 2013102147561 A CN2013102147561 A CN 2013102147561A CN 201310214756 A CN201310214756 A CN 201310214756A CN 103335850 A CN103335850 A CN 103335850A
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Abstract
The invention relates to a bicycle start braking performance test device. The bicycle start braking performance test device comprises emission units and reception units, wherein the emission units comprise emission controllers and laser emission tubes, light sources emitted by the laser emission tubes are spot light sources, the reception units comprise reception controllers, communication modules and laser reception tubes, the emission units are mounted on emission supports, the reception units are mounted on reception supports, the emission supports are provided with the laser emission tubes with equidistant intervals, the reception supports are provided with the laser reception tubes with equidistant intervals, the emission supports and the reception supports are respectively arranged at two sides of a straight bicycle travelling path, the emission supports and the reception supports are respectively on one line, the laser emission tubes and the laser reception tubes are identical in number and are matched in one-to-one correspondence, and light spots of the matched laser emission tubes project in reception areas of the laser reception tubes correspondingly. The bicycle start braking performance test device has advantages of simplified structure, convenient mounting and relatively high control precision.
Description
Technical field
The present invention relates to bicycle performance test field, especially a kind of bicycle starting braking performance test device.
Background technology
A key index to bicycle and the detection of electric bicycle security performance is test bicycle brake time and distance.The mode that adopts during reality use at present is to brake moment, utilizes the bicycle brake lever to drive powder shotgun at the underground vestige of stamping, and as the starting point of braking, uses the tape measure braking distance after wait is stopped.This method road pavement has certain destructiveness, and certain danger is arranged during use, though can measure braking distance, accurately measure the brake time then must be used with other surveying instrument.
The bicycle brake distance initial velocity also with brake the time is relevant, the influence of speed in the time of must considering to brake when therefore analyzing the bicycle brake performance, and the vehicle speed measuring system has radar Doppler to test the speed at present, GPS tests the speed, video frequency speed-measuring, inductive coil test the speed etc.Radar Doppler and GPS test the speed aspect measuring vehicle speed use very extensive, but bigger for the slower measurand test error of movement velocitys such as bicycle.The video frequency speed-measuring capturing system, it is mainly used in investigation, and its analytic process is comparatively complicated.The inductive coil test macro, the circle of need under the road surface, sunkening cord that tests the speed, the construction and installation complexity is not easy to promote.Adopting photoelectric technology to realize testing the speed also is a kind of commonplace method of using, at two pairs of laser of placement separated by a distance or infrared or general visible emission and receiving trap, by measuring measured object by the time of two pairs of photoelectric tubes, calculate the speed of passing through this point according to the distance of two photoelectric tubes then, because the more high required photoelectric tube of precision of test is just more many, can make to be difficult for wiring, power supply complexity installation, transfer and data in the open air when using and to transmit, regulate the difficulty height.
Summary of the invention
For the complex structure that overcomes existing bicycle starting braking performance test technology, trouble, deficiency that control accuracy is lower are installed, the invention provides a kind of simplified structure, easy for installation, bicycle starting braking performance test device that control accuracy is higher.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of bicycle starting braking performance test device, described measurement mechanism comprises transmitter unit and receiving element, described transmitter unit comprises mission controller and LASER Discharge Tube, the light source of described LASER Discharge Tube emission is pointolite, and described receiving element comprises reception controller, communication module and laser pick-off pipe;
Described transmitter unit is installed on the emission support, described receiving element is installed on the receiving tray, uniformly-spaced arrange LASER Discharge Tube on the described emission support, uniformly-spaced arrange the laser pick-off pipe on the described receiving tray, described emission support and receiving tray lay respectively at the both sides of driving straight line path, described emission support and receiving tray all are straight line, described LASER Discharge Tube equates with the quantity of described laser pick-off pipe and pairing one by one that the luminous point of the described LASER Discharge Tube of pairing drops in the receiving area of corresponding laser pick-off pipe mutually.
Further, described proving installation also comprises the startup power valve and starts receiving tube, described startup power valve is positioned at the end of described emission support, described startup receiving tube is positioned at the end of described receiving tray, the luminous point of described startup power valve drops in the receiving area of described startup receiving tube, described startup power valve is connected with described reception controller, and described startup receiving tube is connected with described mission controller.The design of this prioritization scheme can be played energy-saving and cost-reducing effect.
Further, a described transmitter unit and a receiving element form a test cell, and described proving installation comprises at least two test cells that are arranged side by side.Form proving installation by a plurality of test cell assemblings, easy to operate.
Described laser pick-off pipe is connected with described communication module, and described communication module is connected with master controller, and described master controller is connected to computing machine by USB or RS-232 interface, and described each transmitter unit is connected with supplying cell with receiving element.
Described communication module is the Zigbee wireless communication module.Certainly, also other wireless communication modes can be selected for use, even also wire communication mode can be adopted.
Described supplying cell is dismountable rechargeable battery or dry cell.
Described LASER Discharge Tube is the correlation photoemission cell, and described laser pick-off pipe is the correlation photoelectric receiving tube.
Beneficial effect of the present invention mainly shows: simplified structure, easy for installation, control accuracy is higher.
Description of drawings
Fig. 1 is bicycle starting braking performance test device basic structure synoptic diagram.
Fig. 2 is the test cell synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
See figures.1.and.2, a kind of bicycle starting braking performance test device, described measurement mechanism comprises transmitter unit and receiving element, described transmitter unit comprises mission controller and LASER Discharge Tube, the light source of described LASER Discharge Tube emission is line source, and described receiving element comprises reception controller, communication module and laser pick-off pipe;
Described transmitter unit is installed on the emission support, described receiving element is installed on the receiving tray, uniformly-spaced arrange LASER Discharge Tube on the described emission support, uniformly-spaced arrange the laser pick-off pipe on the described receiving tray, described emission support and receiving tray lay respectively at the both sides of driving straight line path, described emission support and receiving tray all are straight line, described LASER Discharge Tube equates with the quantity of described laser pick-off pipe and pairing one by one that the luminous point of the described LASER Discharge Tube of pairing drops in the receiving area of corresponding laser pick-off pipe mutually.
Further, described proving installation also comprises the startup power valve and starts receiving tube, described startup power valve is positioned at the end of described emission support, described startup receiving tube is positioned at the end of described receiving tray, the luminous point of described startup power valve drops in the receiving area of described startup receiving tube, described startup power valve is connected with described reception controller, and described startup receiving tube is connected with described mission controller.
The measurement mechanism of present embodiment is that the test cell of L is formed by a plurality of length, and a described test cell is made of a transmitter unit and a receiving element, and described transmitter unit is A
1～A
n, described receiving element is B
1～B
nDescribed transmitter unit built on stilts certain altitude is arranged in a side of driving straight line path in proper order, described receiving element is arranged in opposite side, and described transmitter unit and receiving element keep point-blank, described transmitter unit parallel with described receiving element over against and vertical range be S.
The mission controller of present embodiment, reception controller all adopt singlechip controller, certainly, also can select the other types controller for use.
We are example with single test cell, described transmitter unit A
1Formed described receiving element B by singlechip controller, LASER Discharge Tube
1Formed by singlechip controller, communication module and laser pick-off pipe.Described transmitter unit A
1With receiving element B
1Be installed in the elongated aluminium section bar described transmitter unit A respectively
1Arrange a LASER Discharge Tube every certain distance, be 10～19, described receiving element B
1Arrange a laser pick-off pipe every corresponding distance, be 20～29, distance equates between described all LASER Discharge Tube, and the luminous point of described LASER Discharge Tube drops in each corresponding receiving tube receiving area; Described receiving element is sent to master controller by communication module with test data, and described master controller is connected to computing machine with the data that receive by USB or RS-232 interface, and described each transmitter unit and receiving element adopt battery independently-powered.
Described vehicle to be tested is defined as from left to right and travels, described each transmitter unit inner laser power valve left side increases a laser pick-off pipe and is connected to the transmitter unit single-chip microcomputer, described each receiving element inner laser receiving tube left side increases a LASER Discharge Tube and is connected to the transmitter unit single-chip microcomputer, as shown in Figure 2, the laser pick-off pipe 2 of described increase and LASER Discharge Tube 1 do not influence the distance size between original LASER Discharge Tube 10～19 and the laser pick-off pipe 20～29, only LASER Discharge Tube 1 conducting before described test begins, the light beam of LASER Discharge Tube 1 directly projects laser pick-off pipe 2, when vehicle to be measured arrives LASER Discharge Tube 1 light beam position foremost, the laser beam that projects laser pick-off pipe 2 is blocked, the transmitter unit single-chip microcomputer does not detect laser pick-off pipe 2 signals, transmitter unit single-chip microcomputer this moment conducting LASER Discharge Tube immediately 10～19, launching 10 parallel laser beam projects on the receiving element, and start timer internal simultaneously, timing is the maximum duration that vehicle passes through this test cell, and timing is to LASER Discharge Tube 10～19 Close Alls.When vehicle drives to LASER Discharge Tube 10 laser beam positions, laser beam is blocked, the receiving element single-chip microcomputer receives laser pick-off pipe 20 signals, single-chip microcomputer timer zero clearing this moment also starts, close LASER Discharge Tube 1 simultaneously, when vehicle travels through LASER Discharge Tube 11～19 successively, described laser pick-off pipe signal generation saltus step, the receiving element single-chip microcomputer is according to laser pick-off pipe 21～29 signals record timer time value, described communication module sends data to master controller, start timer internal simultaneously, timing is the interval time of twice test setting in advance of system, when timing arrives conducting LASER Discharge Tube again 1, for test is next time prepared.
Because the fixed distance of per two groups of photoelectric tubes, described computing machine is horizontal ordinate with time according to the data that receive, displacement is ordinate, draw out displacement-time curve and the speed-time curve of vehicle to be measured, throughput Velocity-time and displacement-time curve can calculate time and brake (starting) distance value of car brakeing (starting) again.
Described communication module is the Zigbee wireless communication module, and described communication module adopts single worker's communication modes.Certainly, also can select other communication modes for use.
Described supplying cell adopts dismountable lithium battery or the power supply of common rechargeable battery, also can adopt the general dry battery power supply.
Described LASER Discharge Tube and receiving tube are correlation photoemission cell and receiving tube.
In the present embodiment, each LASER Discharge Tube and corresponding laser pick-off pipe over against, and guarantee that under the unobstructed situation in centre the light of LASER Discharge Tube emission can be received by the laser pick-off pipe.When vehicle to be measured when traffic route is travelled, vehicle to be measured at first blocks a pair of LASER Discharge Tube foremost, the laser pick-off pipe output signal upset corresponding with this power valve, can think that saltus step (by often opening or normally closed decision of photoelectric tube) takes place the photoelectric receiving tube output level from high to low or from low to high, this saltus step sign by controller as clock enable signal, start clock timing, when vehicle remainder to be measured passes through this, might be blocked and may not be blocked by light, the saltus step model of this moment does not process.Equally, when vehicle to be measured arrives second pair of LASER Discharge Tube and laser pick-off pipe foremost, second pair of laser pick-off pipe signal generation saltus step, this moment, this value entered the time of second photoelectric tube as vehicle to be measured by controller record elapsed time clock value.By that analogy, when vehicle to be measured successively by all photoelectric tube positions, saltus step all takes place as timing signal recording clock value with the signal of each photoelectric tube in controller for the first time.Like this, controller just can access vehicle to be measured by the time of each photoelectric tube, because the fixed distance of per two groups of photoelectric tubes, therefore controller just can be according to calculating a velocity amplitude by per two groups of photoelectric tubes, when vehicle to be measured passes through all photoelectric tubes, controller can be drawn two curves in same curvilinear frame, this curve horizontal ordinate is the time, ordinate 1 is displacement, ordinate 2 is speed, article two, curve record time and the speed by each photoelectric tube, controller can also obtain accelerating curve according to the velocity variations value.Can calculate the parameter values of all kinds of relevant speed such as average speed by certain zone, max. speed according to this curve.
Vehicle to be measured enters emergency brake behind the test zone, and vehicle to be measured moves stop motion behind the segment distance forward, is braking distance from the brake starting point to the distance the stop.Utilize Velocity-time and displacement-time curve can obtain brake time and braking distance value at an easy rate.Analyze from velocity variations, vehicle to be measured can slow down suddenly during emergency brake, hunting speed begins the point of decline suddenly from curve, draw one by this point and the straight line vertical with X-axis at curve, the corresponding shift value of the intersection point of this straight line and displacement curve is exactly the shift value of braking starting point; Seeking first speed at rate curve is zero point, also draw one by this point and the straight line vertical with X-axis, the corresponding shift value of the intersection point of this straight line and displacement curve is exactly the displacement of the point that stops of car brakeing to be measured, deducted the shift value of braking starting point by this value, resulting value is exactly vehicle braked distance to be measured, and the difference of two corresponding horizontal ordinates of point is braked the time exactly.It is the starting time when vehicle begins to start to the time that reaches command speed, the distance of travelling is start distance, speed began to increase by zero when vehicle to be measured began to accelerate, record displacement and the time at this moment, record displacement and time when reaching the command speed value, both differences are exactly starting time and start distance.
Optoelectronic switch mainly contains correlation and reflective two kinds, reflection light barrier emission and reception one, easy to install, but reflection light barrier emission and receiving angle are bigger, therefore the relative correlation optoelectronic switch of measuring accuracy is lower, has therefore adopted correlation photoemission and receiving tube to realize high precision speed-measuring and starting braking time and range observation.
Because measuring distance is longer, all test cells all will be wired to controller, even controller is arranged in all test cell centre positions, also still exist connecting line oversize, and thereby quantity causes wiring complicated too much, therefore whole testing device is made of several test cells, adopts the Zigbee wireless communication module to realize the low power consumption data transmission.All transmitter units are not installed communication module, and all receiver modules are installed communication module, by the receiving element Single-chip Controlling, adopt single worker's communication modes, namely can only send data toward main frame by test cell, and test cell does not receive order or the data that main frame sends.Main frame realizes and all test cell data communications, and the data that receive are sent to computer by communication interfaces such as USB or RS-232, realized data processing, analysis and test curve and result's demonstration by computer.
Each test cell has address separately, and the front and back of each test cell have determined shift value in proper order, and sequence error then causes the confusion of all test datas, therefore must specify the order of each test cell.For ease of operation and maintenance, make all transmitter units and receiving element order not need predetermined fixed, as long as guarantee that all test cells are arranged in two parallel lines, transmitter unit and receiving element can combination in any use, need not the order of address is done any artificial setting, because the time of vehicle by each test cell has successively, so determine the order of test cell before and after the time of the data that directly send according to each test cell that receives of main frame.
Because total system needs to use in the open air, powerup issue is a subject matter, so the present invention do not adopt common electric main power supply plan, but adopts the powered battery scheme.Each transmitter unit and receiving element are independently-powered, adopt the power supply of dismountable lithium battery or common rechargeable battery, also can adopt the general dry battery power supply.Dismountable purpose is to be convenient to charging and replacing.The power consumption that a plurality of LASER Discharge Tube are opened simultaneously is bigger, and the therefore ON time of necessary control photoelectric tube rationally and receiving tube, so transmitter unit does not connect main frame, does not therefore have the communication power consumption.Receiving element and main frame adopt the one-way communication mode, namely have only receiving element that test data is sent to main frame, and do not accept the control command of main frame, effectively reduce stand-by power consumption, control the ON time of Laser emission and receiving tube simultaneously, the conducting that a leftmost laser beam is controlled right-hand laser beam in each test cell realizes power saving.
Utilize same set of device, can utilize the succinct speed of a motor vehicle and starting braking time and the distance also accurately obtained directly perceived of test curve.And vehicle speed measurement and braking performance test can disposablely be finished, the measuring accuracy height, and easy to use, system power dissipation is low, and cost is low, is convenient to safeguard.
The speed and the braking performance test that are particularly useful for electric bicycle.This method also can be applied to the test of other vehicles such as toy car, motorcycle or mobile object.
Claims (7)
1. a bicycle starts the braking performance test device, it is characterized in that: described measurement mechanism comprises transmitter unit and receiving element, described transmitter unit comprises mission controller and LASER Discharge Tube, the light source of described LASER Discharge Tube emission is pointolite, and described receiving element comprises reception controller, communication module and laser pick-off pipe;
Described transmitter unit is installed on the emission support, described receiving element is installed on the receiving tray, uniformly-spaced arrange LASER Discharge Tube on the described emission support, uniformly-spaced arrange the laser pick-off pipe on the described receiving tray, described emission support and receiving tray lay respectively at the both sides of driving straight line path, described emission support and receiving tray all are straight line, described LASER Discharge Tube equates with the quantity of described laser pick-off pipe and pairing one by one that the luminous point of the described LASER Discharge Tube of pairing drops in the receiving area of corresponding laser pick-off pipe mutually.
2. bicycle as claimed in claim 1 starts the braking performance test device, it is characterized in that: described proving installation also comprises the startup power valve and starts receiving tube, described startup power valve is positioned at the end of described emission support, described startup receiving tube is positioned at the end of described receiving tray, the luminous point of described startup power valve drops in the receiving area of described startup receiving tube, described startup power valve is connected with described reception controller, and described startup receiving tube is connected with described mission controller.
3. bicycle as claimed in claim 1 or 2 starts the braking performance test device, it is characterized in that: a described transmitter unit and a receiving element form a test cell, and described proving installation comprises at least two test cells that are arranged side by side.
4. bicycle as claimed in claim 1 or 2 starts the braking performance test device, it is characterized in that: described laser pick-off pipe is connected with described communication module, described communication module is connected with master controller, described master controller is connected to computing machine by USB or RS-232 interface, and described each transmitter unit is connected with supplying cell with receiving element.
5. bicycle as claimed in claim 1 or 2 starts the braking performance test device, and it is characterized in that: described communication module is the Zigbee wireless communication module.
6. bicycle as claimed in claim 3 starts the braking performance test device, and it is characterized in that: described supplying cell is dismountable rechargeable battery or dry cell.
7. bicycle as claimed in claim 1 or 2 starts the braking performance test device, and it is characterized in that: described LASER Discharge Tube is the correlation photoemission cell, and described laser pick-off pipe is the correlation photoelectric receiving tube.
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| CN2013102147561A CN103335850A (en) | 2013-05-31 | 2013-05-31 | Bicycle start braking performance test device |
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| CN2013102147561A CN103335850A (en) | 2013-05-31 | 2013-05-31 | Bicycle start braking performance test device |
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Application publication date: 20131002 |