CN209813926U - Full-automatic windscreen wiper control system of railway vehicle - Google Patents
Full-automatic windscreen wiper control system of railway vehicle Download PDFInfo
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- CN209813926U CN209813926U CN201920344062.2U CN201920344062U CN209813926U CN 209813926 U CN209813926 U CN 209813926U CN 201920344062 U CN201920344062 U CN 201920344062U CN 209813926 U CN209813926 U CN 209813926U
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- 238000012545 processing Methods 0.000 claims abstract description 26
- 238000004148 unit process Methods 0.000 claims abstract description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 15
- 230000005669 field effect Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000007790 scraping Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 8
- 230000009467 reduction Effects 0.000 description 6
- 206010039203 Road traffic accident Diseases 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Abstract
The utility model discloses a full-automatic windscreen wiper control system of rail vehicle, including grey level sensor, central processing unit, electrical unit, motor drive unit, electrical unit, wiper, its characterized in that: the gray sensor is used for detecting the rainfall and transmitting the rainfall information to the central processing unit; the central processing unit processes the received rainfall information to obtain a control command and then transmits the control command to the motor driving unit; the motor driving unit identifies a control command sent by the central processing unit to obtain a driving signal and then transmits the driving signal to the motor unit; and the motor unit requires to drive the windscreen wiper to work according to the instruction of the driving signal. The utility model discloses a gray sensor detects the rainfall size, and through the singlechip according to the frequency of scraping water of rainfall size information control wiper, form full-automatic windscreen wiper control system, improved the security of driving.
Description
Technical Field
The utility model relates to a rail transit technical field especially relates to a full-automatic windscreen wiper control system of rail vehicle.
Background
With the vigorous development of the rail transit industry, the number of rail trains is continuously increasing. The speed of the existing windscreen wiper of most of railway vehicles needs to be adjusted manually, although rainwater on a windshield can be scraped off in rainy days, the speed of the windscreen wiper needs to be adjusted manually by drivers when the rainfall amount is different, so that the energy of the drivers is dispersed, the driving difficulty of the drivers in rainy days is increased, and the possibility of traffic accidents is increased.
Aiming at the problems, the full-automatic windscreen wiper control system for the rail vehicle is designed, the windscreen wiper can automatically detect the rainfall and intelligently adjust the speed of the windscreen wiper, so that a driver can concentrate on observing road conditions when driving in rainy days, and traffic accidents caused by the fact that the driver operates the windscreen wiper with dispersed attention can be reduced.
Disclosure of Invention
An object of the utility model is to provide a full-automatic windscreen wiper control system of rail vehicle, full-automatic windscreen wiper control system adopt grey level sensor to detect the rainfall size to through the frequency of scraping water of single chip microcomputer control windshield wiper, improve the degree of difficulty of driving and the security of driving, the utility model discloses simple structure, convenient operation moves comparatively stably, and the automatic rain effect of scraping is comparatively showing.
In order to realize the utility model discloses the purpose, the utility model provides a full-automatic windscreen wiper control system of rail vehicle, including grey level sensor, central processing unit, electrical unit, motor drive unit, electrical unit and wiper, grey level sensor distributes in rail train front windshield department, its characterized in that: the gray sensor is used for detecting the rainfall and transmitting rainfall information to the central processing unit; the central processing unit processes the received rainfall information to obtain a control command and then transmits the control command to the motor driving unit; the motor driving unit identifies a control command sent by the central processing unit to obtain a driving signal, and then transmits the driving signal to the motor unit; the motor unit requires to drive the windscreen wiper to work according to the instruction of the driving signal, and the power supply unit supplies power to the gray sensor, the central processing unit, the motor driving unit and the motor unit.
As a further improvement of the utility model, the power supply unit includes 24V storage battery, voltage stabilizing module converts 24V voltage into behind the stable 5V voltage parallelly connected output give grayscale sensor, central processing unit, motor drive unit.
As a further improvement of the utility model, the voltage stabilizing module comprises an LM2940 voltage stabilizing chip.
As a further improvement of the present invention, the motor unit includes 2 identical reduction dc motors.
As a further improvement of the utility model, the central processing unit adopts an MC9S12XS128 singlechip as a micro control core.
As a further improvement of the utility model the MC9S12XS128 singlechip with the chip is kept apart to the series connection opto-coupler between the motor drive unit, will the MC9S12XS128 singlechip with the motor drive unit is kept apart, reduces the mutual interference between the circuit.
As a further improvement of the present invention, the optical coupling isolation chip is a TLP521-2 chip.
As a further improvement of the utility model, the motor drive unit chooses for use the full-bridge drive circuit who takes field effect transistor, the full-bridge drive circuit comprises two BTS7970 chips.
As a further improvement of the utility model, the motor drive unit chooses for use the full-bridge drive circuit who takes field effect transistor, the full-bridge drive circuit comprises two BTS7970 chips.
The utility model has the advantages that: adopt the utility model discloses full-automatic windscreen wiper control system of rail vehicle detects the rainfall size and sends rainfall information to central processing unit through grey level sensor, forms corresponding control instruction after central processing unit is to rainfall information processing to the frequency of wiping water of control wiper has realized full-automatic windscreen wiper control function, has improved the security of driving.
Drawings
Fig. 1 is a working schematic diagram of the fully automatic wiper control system for the railway vehicle of the present invention;
fig. 2 is an information transmission diagram of the fully automatic wiper control system for the rail vehicle of the present invention;
fig. 3 is the utility model discloses the full-automatic windscreen wiper control system speed reduction direct current motor drive structure chart of rail vehicle.
Detailed Description
The present invention will be described in detail below with reference to embodiments shown in the drawings. However, the present invention is not limited to the embodiment, and the structural, method, or functional changes made by those skilled in the art according to the embodiment are all included in the scope of the present invention.
As shown in fig. 1, fig. 2 and fig. 3, the utility model provides a pair of full-automatic windscreen wiper control system of rail vehicle, including grey level sensor, central processing unit, 24V storage battery, LM2940 steady voltage chip, motor drive unit, motor element, wiper, grey level sensor distributes in the inboard of rail train front windshield, central processing unit distributes in the carriage. The information output interface of the gray sensor is connected with the information input interface of the central processing unit; the signal output interface of the central processing unit is connected with the signal input interface of the motor driving unit; the signal output interface of the motor driving unit is connected with the motor unit; the motor unit is connected with the windscreen wiper. The 24V storage battery pack directly supplies power to the motor unit, and the LM2940 voltage stabilizing chip converts 24V voltage into 5V voltage for stabilizing the power to the gray sensor, the central processing unit and the motor driving unit.
The gray sensor is composed of a triode and a light emitting diode and used for detecting the rainfall, the working principle of the gray sensor is that the current of the gray sensor is changed according to the change of the shielding degree of raindrops to light, so that the rainfall is judged, when the rainfall is small, the return value of the brightness is large, and when the rainfall is very large, the brightness of the light reflected by the detection surface is small, so that the return value of the gray sensor is reduced. In the practical use process of the gray sensor, an LM2940 voltage stabilizing chip is required to provide a 5V voltage stabilizing power supply for the gray sensor, then the voltage of an OUT pin is detected by an AD port, and the intensity of reflected light is distinguished by judging the size of an AD converted digital signal.
The central processing unit mainly comprises a crystal oscillator unit, a reset circuit and a BDM circuit, the MC9S12XS128 single chip microcomputer is used as a micro control core, and the MC9S12XS128 single chip microcomputer is an enhanced 16-bit single chip microcomputer and has the characteristics of high operation speed and high cost performance.
The LM2940 voltage stabilizing chip has a voltage stabilizing function, and when the voltage stabilizing chip is used, a 24V power supply is converted into a voltage stabilizing 5V power supply, so that stable and continuous power supply guarantee is provided for normal operation of the whole system, particularly for the gray sensor and the MC9S12XS128 single chip microcomputer, and the situation that the single chip microcomputer is repeatedly restarted and burnt down due to voltage fluctuation of a power supply unit is avoided. In addition, in order to protect the MC9S12XS128 single chip microcomputer and reduce the influence of other circuits on the core board of the single chip microcomputer to the maximum extent, and further ensure the stability of the whole system, an optical coupling isolation chip TLP521-2 is connected in series between the core board of the MC9S12XS128 single chip microcomputer and the motor driving unit, as shown in fig. 3, when signal transmission is performed between circuits, the MC9S12XS128 single chip microcomputer is isolated from the motor driving unit, so that the safety is improved, the circuit interference is reduced, and the circuit design is simplified. Meanwhile, the forward current of the TLP521-2 is only 50mA, which meets the requirement of circuit design.
The motor unit adopted by the invention comprises 2 direct current motors which are used for driving the windshield wipers to work, and for the selection of the motors, the working voltage, the output power and the torque of the motors need to be considered, so that the power and the torque needed for driving the windshield wipers are relatively not large, the output power is more than 50W, and the torque is not less than 25N cm. In combination with the above consideration, in the present invention, 2 deceleration dc motors with a rated voltage of 24V and an operating voltage of 12-30V are finally selected. Other parameters of the speed reduction direct current motor are as follows: the rated current is 3.5A, the no-load current is 0.7A, the locked-rotor current is 8A, and the torque is 40N cm.
In the invention, the speed reduction direct current motor needs to work in a positive and negative rotation mode, so that a field effect transistor is selected as the drive of the motor, the problem of serious heating can be avoided due to the fact that the equivalent resistance in the field effect transistor is very small, meanwhile, the field effect transistor can provide large drive current, and the motor drive unit is formed by two BTS7970 chips with a half-bridge drive function. The BTS7970 chip is characterized by large driving current and unobvious chip heating condition, and is provided with a P-channel high-side MOSFET, an N-channel low-side MOSFET and a driving IC. The on-state resistance of the BTS7970 chip IS 16m omega, the driving current can reach 43A, the short-circuit protection function IS realized, the pin IS has the current detection function, and when the chip works normally, the current flowing out of the pin IS IS in direct proportion to the current flowing through the high-side MOSFET. When the chip fails, the current flowing from the IS IS around 4.5 mA. The quality of the chip can be judged by the detection mode. When the intelligent windscreen wiper system breaks down, the efficiency of removing the fault can be improved to a certain extent.
When the automobile windscreen wiper is used, a power switch of the gray sensor is turned on, the gray sensor detects the rainfall and transmits the rainfall information to the MC9S12XS128 single chip microcomputer, the MC9S12XS128 single chip microcomputer analyzes and processes the received rainfall information to obtain the frequency of the windscreen wiper needing to be wiped, the MC9S12XS128 single chip microcomputer converts the wiping frequency and the control information into electric signals to be transmitted to the BTS7970 chip, the BTS7970 chip identifies the electric signals and then sends an operation instruction to the speed reduction direct current motor, and the speed reduction direct current motor drives the windscreen wiper to work.
To sum up, the utility model discloses full-automatic windscreen wiper control system of rail vehicle, the size that the wiper can automated inspection rainfall and the speed of the regulation wiper of intelligence for the driver can concentrate on observing the road conditions when the rainy day driving, alright reduce the driver because the traffic accident that dispersion attention operation wiper leads to.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (8)
1. The utility model provides a full-automatic windscreen wiper control system of rail vehicle, includes grey level sensor, central processing unit, electrical unit, motor drive unit, electrical unit and wiper, grey level sensor distributes in rail train front windshield department, its characterized in that: the gray sensor is used for detecting the rainfall and transmitting the rainfall information to the central processing unit; the central processing unit processes the received rainfall information to obtain a control command and then transmits the control command to the motor driving unit; the motor driving unit identifies a control command sent by the central processing unit to obtain a driving signal, and then transmits the driving signal to the motor unit; the motor unit requires to drive the windscreen wiper to work according to the instruction of the driving signal, and the power supply unit supplies power to the gray sensor, the central processing unit, the motor driving unit and the motor unit.
2. The fully automatic wiper control system of claim 1, wherein: the power supply unit comprises a 24V storage battery pack and a voltage stabilizing module, wherein the voltage stabilizing module converts 24V voltage into stable 5V voltage and then outputs the stable 5V voltage to the gray sensor, the central processing unit and the motor driving unit in parallel.
3. The fully automatic wiper control system of claim 2, wherein: the voltage stabilizing module comprises an LM2940 voltage stabilizing chip.
4. The fully automatic wiper control system of claim 1, wherein: the motor unit comprises 2 identical reduced-speed direct-current motors.
5. The fully automatic wiper control system of claim 1, wherein: the central processing unit adopts an MC9S12XS128 singlechip as a micro-control core.
6. The fully automatic wiper control system of claim 5, wherein: an optical coupling isolation chip is connected between the MC9S12XS128 single chip microcomputer and the motor driving unit in series, the MC9S12XS128 single chip microcomputer is isolated from the motor driving unit, and mutual interference among circuits is reduced.
7. The fully automatic wiper control system of claim 6, wherein: the optical coupling isolation chip is a TLP521-2 chip.
8. The fully automatic wiper control system of claim 1, wherein: the motor driving unit adopts a full-bridge driving circuit with a field effect transistor, and the full-bridge driving circuit is composed of two BTS7970 chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920344062.2U CN209813926U (en) | 2019-03-18 | 2019-03-18 | Full-automatic windscreen wiper control system of railway vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920344062.2U CN209813926U (en) | 2019-03-18 | 2019-03-18 | Full-automatic windscreen wiper control system of railway vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209813926U true CN209813926U (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920344062.2U Active CN209813926U (en) | 2019-03-18 | 2019-03-18 | Full-automatic windscreen wiper control system of railway vehicle |
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| Country | Link |
|---|---|
| CN (1) | CN209813926U (en) |
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2019
- 2019-03-18 CN CN201920344062.2U patent/CN209813926U/en active Active
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Effective date of registration: 20201119 Address after: 4301, 43 / F, building 3, yard 1, East Automobile Museum Road, Fengtai District, Beijing 100071 Patentee after: CHINA RAILWAY HI-TECH INDUSTRY Corp.,Ltd. Patentee after: CHINA RAILWAY RAIL TRANSPORTATION EQUIPMENT Co.,Ltd. Address before: 210 000 Buyue Road, 29 Qiaolin Street, Pukou District, Nanjing City, Jiangsu Province, 12-253 Patentee before: CHINA RAILWAY RAIL TRANSPORTATION EQUIPMENT Co.,Ltd. |