CN103711403B - The anti-clip control method of automobile electric car-window and system - Google Patents
The anti-clip control method of automobile electric car-window and system Download PDFInfo
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- CN103711403B CN103711403B CN201310650359.9A CN201310650359A CN103711403B CN 103711403 B CN103711403 B CN 103711403B CN 201310650359 A CN201310650359 A CN 201310650359A CN 103711403 B CN103711403 B CN 103711403B
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Abstract
The present invention is applicable to automotive field, provides a kind of anti-clip control method and system of automobile electric car-window, and described method comprises the steps: to determine that automobile electric car-window is in automatic closing process; The position of power windows is obtained by the number of Hall pulse; When the position of this power windows is in anti-pinch region, the ripple current according to this power windows motor obtains the rotary speed information of motor, positional information and acceleration information; Judge whether vehicle window runs into obstruction, when running into obstruction, by motor stalling by the rotary speed information of this motor and ripple current.Technical scheme provided by the invention has pinch resistant functionality.
Description
Technical field
The invention belongs to automotive field, particularly relate to a kind of anti-clip control method and system of automobile electric car-window.
Background technology
Along with the develop rapidly of science and technology, increasing advanced science and technology is used to life, and the utilization of new science and technology makes the life of people become more convenient, harmonious, safety.Along with the progress of Hyundai Motor electronic technology, component traditional in automobile and assembly are also developing to electromechanical integration, and the electronic equipment widely applied in automobile, not only increases the comfortableness of automobile, also proposes new requirement to the safety of automobile.Conveniently driver and passenger, a large amount of automobile adopts power windows, and many automotive windows do not have pinch resistant functionality, easily cause the injury to occupant especially children.
Summary of the invention
The object of the embodiment of the present invention is the anti-clip control method providing a kind of automobile electric car-window, is intended to solve automotive window in prior art and does not have pinch resistant functionality, easily to the injury problem of occupant especially children.
On the one hand, provide a kind of anti-clip control method of automobile electric car-window, described method comprises the steps:
Determine that automobile electric car-window is in automatic closing process;
The position of power windows is obtained by the number of Hall pulse;
When the position of this power windows is in anti-pinch region, the ripple current according to this power windows motor obtains the rotary speed information of motor, positional information and acceleration information;
Judge whether vehicle window runs into obstruction, when running into obstruction, by motor stalling by the rotary speed information of this motor and ripple current.
Optionally, described method, by after motor stalling, also comprises:
By motor reversal.
Optionally, the described ripple current according to this power windows motor obtains the rotary speed information of motor, positional information and acceleration information; Judge whether vehicle window runs into obstruction and specifically comprise by the rotary speed information of this motor and ripple current:
Detect AC compounent and the ripple current of the dc motor electric current of power windows, filtering is carried out to ripple current, judges whether power windows runs into obstruction according to the change of filtered ripple current.
Optionally, described method is determining that automobile electric car-window also comprises before being in automatic closing process:
Temperature in inspection vehicle, controls the aperture of power windows according to this temperature.
Second aspect, provides a kind of clamping-proof control system of automobile electric car-window, and described system comprises:
Controller, serial communication, single-chip minimum system, motor drive module, stepper motor, drive current detection module, temperature detecting module, numeral method module, Independent keys control module and warning circuit;
Wherein, controller is connected with single-chip minimum system by serial communication, and motor drive module is connected with drive current detection module stepper motor;
Single-chip minimum system connects and is also connected with motor drive module, drive current detection module, temperature detecting module, numeral method module, Independent keys control module, warning circuit respectively;
Drive current detection module, obtains the rotary speed information of motor, positional information and acceleration information for the ripple current according to this power windows motor; Judge whether vehicle window runs into obstruction by the rotary speed information of this motor and ripple current;
Single-chip minimum system, for when drive current detection module judges that vehicle window runs into obstruction, passes to controller by judged result;
Controller, for controlling power windows stopping or reverse.
In embodiments of the present invention, technical scheme provided by the invention can make automobile electric car-window have pinch resistant functionality, so it has pinch resistant functionality, can not injure occupant especially children.
brief Description Of Drawings
Fig. 1 is the flow chart of the anti-clip control method of automobile electric car-window provided by the invention;
Fig. 2 is the structure chart that hall signal provided by the invention detects vehicle window clamping-proof control system;
Fig. 3 is that current ripples provided by the invention detects car door clamping-proof control system figure;
Fig. 4 is the structure chart of the clamping-proof control system of automobile electric car-window provided by the invention.
implement mode of the present invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The anti-pinch design scheme of the application adopts the situation of change detecting motor-drive circuit feedback circuit, and carry out processing according to this electric current fed back and judge to realize the pinch resistant functionality of vehicle window, this technical scheme guarantees that anti-pinch is reliable for effect, and cost is lower, good stability.
So-called anti-pinching car window, just refer to has object to be jammed in vehicle window uphill process, when clamping object and after reaching certain dynamics, allowing vehicle window automatically stop or falling after rise, crushed in order to prevent object (owing to being people).The application adopts and detects motor drive feedback current system to determine whether vehicle window runs into obstruction or stall in uphill process.
In addition, in order to make vehicle window have more hommization, this control system also add vehicle interior temperature and detects and the aperture (namely during the relative full off state of vehicle window, the position at glass for vehicle window place is relative to the moveable distance of vehicle window) being controlled vehicle window by vehicle interior temperature.The application have employed digital temperature sensor and controls temperature, high with its certainty of measurement, simple to operate.The advantages such as performability is strong, cheap, are specially adapted to life, medical treatment, the temperature survey of the aspects such as industrial production and control.This temperature detection is joined in control system, improves the comfort level by bus of what passenger of driver, enjoyed the convenience of scientific and technological progress band, make the more intelligent and hommization of automotive window.
The specific embodiment of the invention provides a kind of anti-clip control method of automobile electric car-window, and the method as shown in Figure 1, comprises the steps:
101, determine that automobile electric car-window is in automatic closing process;
102, the position of power windows is obtained by the number of Hall pulse;
103, when the position of this power windows is in anti-pinch region, the ripple current according to this power windows motor obtains the rotary speed information of motor, positional information and acceleration information;
104, judge whether vehicle window runs into obstruction, when running into obstruction, by motor stalling by the rotary speed information of this motor and ripple current.
Optionally, said method, after 104, can also comprise:
By motor reversal, personage can better be avoided like this to be crushed.
Optionally, the implementation method of above-mentioned 102 is specifically as follows, and wherein, this hall signal detects the structure of vehicle window clamping-proof control system as shown in Figure 2;
The Hall element of vehicle window controller detects the position of magnetic pole of the multistage magnet ring on motor shaft, often send a pulse through a magnetic pole, position due to now vehicle window is converted to the number of hall signal pulse, so can be obtained the position of vehicle window by the number of hall signal pulse.
With some alternating components in DC quantity, this be superimposed upon in DC stabilization amount AC compounent be just referred to as ripple.The alternating component of motor, namely the frequency of so-called motor " ripple " has then fully demonstrated motor speed.Filtering is carried out according to filtered curent change to ripple current, just whether can run into obstruction to power windows and judge.
Optionally, the above-mentioned implementation method of 103,104 is specifically as follows, and wherein detects car door clamping-proof control system as shown in Figure 3 with current ripples,
Detect AC compounent and the ripple current of the dc motor electric current of power windows, filtering is carried out to ripple current, judges whether power windows runs into obstruction according to the change of filtered ripple current.
1) current ripples comprises following information: the positional information after rotary speed information, integration, the acceleration information after differential;
2) carry out current of electric detection with sample resistance, and filtering process is carried out to the ripple current detected, the size of insert power can be judged according to filtered electric current.Certain type vehicle window background power is demarcated (using hand in presentation process as insert power), on this basis according to standard-required, determine the corresponding relation of anti-grip force and current of electric (after filtering), detect the change of current of electric (after filtering) as anti-pinch criterion;
3) by carrying out the digitized processing of computer to the ripple current of this form, pulse signal can be regarded as, process this pulse signal and use, can detect the position of vehicle window and the speed of motor, the speed of motor can be used for the redundancy determination of anti-pinch simultaneously.
Demonstration:
Just can judge whether vehicle window runs into obstruction by the change of motor speed or electric current, by motor the number of turns that turns can judge the position of car door.Although eliminate current detecting unit, simplify part circuit structure, eliminate the trouble brought because of process current noise, be the increase in Hall element and hall sensing processing unit, namely add on cost He in software process.Hardware configuration and Software for Design are cheap, simple, on cost and design difficulty.
Optionally, said method can also comprise before 101:
Temperature in inspection vehicle, controls the aperture of power windows according to this temperature.
This kind of method can the aperture when temperature is higher directly by controlling power windows prevent personage from being pressed from both sides.
Each main functional modules is selected
(1) temperature acquisition Scheme Choice
Scheme one: adopt both-end integrated circuit temperature sensor AD590 collecting temperature or thermocouple, by the collectable temperature range of official's data of AD590 this temperature pick up known-55 degrees Celsius to+150 degrees Celsius, the temperature acquisition range of thermocouple is larger.But circuit composition more complicated, cost is higher, can not directly be connected with single-chip microcomputer.
Scheme two: adopt DS18B20 digital temperature sensor, be-55 degrees Celsius to+125 degrees Celsius, directly export digital quantity, directly can be connected with single-chip microcomputer by official's data of DS18B20 this temperature pick up collecting temperature scope known, circuit connects simple.
Demonstration: scheme one needs to increase analog to digital conversion circuit, add cost undoubtedly high, and circuit is various, and inconvenience is connected with single-chip microcomputer, decreases the usable interface of single-chip microcomputer; Programming turn increases a part of analog-to-digital workload, add the difficulty with Software for Design on hardware.Scheme two only needs an element at circuit, and cost is low, and accuracy is high, and temperature measurement range is wider; The connected mode of monobus is particularly suitable for being connected with single-chip microcomputer, and hardware circuit is simple, and chip is easy to use, so selection scheme two.
(2) data displaying scheme is selected
Scheme one: adopt 1602 or 12864 liquid crystal display datas, displaying contents enriches, and outside display is attractive in appearance magnificent, and capacity is large.But cost is high.
Scheme two: adopt the temperature that numeral method collects, it is clear to show, and low price, relative with single-chip microcomputer connecting circuit simple, but the capacity of display is limited.
Demonstration: although 1602 or 12864 liquid crystal displays in scheme one can show abundant in content, capacity is large, and liquid crystal display price is more expensive.Charactron low price in scheme one, it is clear to show; Although the character of display is limited, software programming is simple, decreases programming difficulty.And in the design, need the temperature shown also not need a lot of content.So survey scheme two should be selected.
(3) selection of motor
Scheme one: adopt direct current generator, starts and good speed adjustment features, and speed adjustable range Guangping is sliding, and overload capacity is comparatively strong, and little by electromagnetic interference influence, speed is higher.
Scheme two: adopt stepper motor, owing to not having the contact devices such as brush, reliability is higher, and the life-span in life-span of motor is long.
Demonstration: in scheme one, DC MOTOR CONTROL is relatively simple, but positioning precision is not high, and high to rate request, stability is also poor.Scheme dual-purpose stepper motor is as the power source of vehicle window, and can realize accurate positioning control, reliability is high, and the life-span is long, and moment is large, and the locking moment when motor power down mode makes to be suitable for use in vehicle window control system.Therefore selection scheme two is answered.
(4) selection of drive motors module
Scheme one: adopt relay to control the logical or disconnected of stepper motor, by the switching of switch, stepper motor is controlled.The advantage of this scheme is that circuit is comparatively simple, and shortcoming is that the response time of relay is slow, and fragile, the life-span is shorter, and reliability is not high.
Scheme two: adopt special chip L298N as motor drive ic.L298N is a full-bridge driving chip with high-voltage large current, and its corresponding frequencies is high.With this chip as driving stepper motor, easy to operate, the advantage such as accuracy is high, good stability.And can be realized accurately controlling stepper motor in conjunction with single-chip microcomputer by L298N.
Demonstration: the comprehensively pluses and minuses of above-mentioned two all schemes, therefore determines to adopt L298N to control direct current generator.
(5) selection of A/D module
Scheme one: adopt ADC0809 as the analog to digital conversion circuit of conversion chip, there are eight channel modulus converters, but needs outside provides clock to carry out work, generally such as can when 51 single-chip microcomputer crystal oscillators be 12MHZ with 500kHZ(, the frequency of ALE pin after the divide by four circuit that LS74HS74 double D trigger forms through 51 single-chip microcomputers gives 0809, makes its work).
Scheme two: adopt ADC0804 as the analog to digital conversion circuit of conversion chip, ADC0804 is single channel, gathers differential signal more convenient; 0804 can external RC produce clock also can external clock.
Project plan comparison: modulus conversion chip ADC0809 and ADC0804 is 8 A/D converters, and the digital quantity after conversion is between 0 ~ 255; It is short compared with ADC0809 that ADC0804 changes required time; Transformed error, analog input voltage scope are all 0 ~+5V.The design of Integrated comparative hardware circuit connects, the height of cost, therefore selection scheme two is as the A/D module of the design.
22..33 the design of overall plan
The design forms primarily of six hardware circuits, one of them circuit is DS18B20 temperature data acquisition, circuit is charactron Temperature displaying, circuit is stepper motor driving circuit, one be current detecting unit circuit (including an A/D change-over circuit, voltage sampling circuit and current filtering circuit), an Independent keys circuit and light emitting diode warning circuit.Module is by STC89C52 series monolithic as controller, and various auxiliary circuit completes the design of overall hardware in addition.Structured flowchart is as shown in Figure 4: comprising: controller, serial communication, single-chip minimum system, motor drive module, stepper motor, drive current detection module, temperature detecting module, numeral method module, Independent keys control module and warning circuit;
Wherein, controller is connected with single-chip minimum system by serial communication, and motor drive module is connected with drive current detection module stepper motor;
Single-chip minimum system connects and is also connected with motor drive module, drive current detection module, temperature detecting module, numeral method module, Independent keys control module, warning circuit respectively;
Drive current detection module, obtains the rotary speed information of motor, positional information and acceleration information for the ripple current according to this power windows motor; Judge whether vehicle window runs into obstruction by the rotary speed information of this motor and ripple current;
Single-chip minimum system, for when drive current detection module judges that vehicle window runs into obstruction, passes to controller by judged result;
Controller, for controlling power windows stopping or reverse.
It will be understood by those skilled in the art that all or part of step of technical scheme that the embodiment of the present invention provides can have been come by the hardware that programmed instruction is relevant.Such as can be come by computer runs programs.This program can be stored in read/write memory medium, such as, and random access memory, disk, CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all equivalent replacements or improvement etc. done within the specific embodiment of the present invention, all should be included within protection scope of the present invention.
Claims (4)
1. an anti-clip control method for automobile electric car-window, is characterized in that, described method comprises the steps:
Determine that automobile electric car-window is in automatic closing process;
The position of power windows is obtained by the number of Hall pulse;
When the position of this power windows is in anti-pinch region, the ripple current according to this power windows motor obtains the rotary speed information of motor, positional information and acceleration information;
Judge whether vehicle window runs into obstruction, when running into obstruction, by motor stalling by the rotary speed information of this motor and ripple current; The described ripple current according to this power windows motor obtains the rotary speed information of motor, positional information and acceleration information; Judge whether vehicle window runs into obstruction and specifically comprise by the rotary speed information of this motor and ripple current:
Detect AC compounent and the ripple current of the dc motor electric current of power windows, filtering is carried out to ripple current, judges whether power windows runs into obstruction according to the change of filtered ripple current.
2. method according to claim 1, is characterized in that, described method, by after motor stalling, also comprises:
By motor reversal.
3. method according to claim 1, is characterized in that, described method is determining that automobile electric car-window also comprises before being in automatic closing process:
Temperature in inspection vehicle, controls the aperture of power windows according to this temperature.
4. a clamping-proof control system for automobile electric car-window, is characterized in that, described system comprises:
Controller, serial communication, single-chip minimum system, motor drive module, stepper motor, drive current detection module, temperature detecting module, numeral method module, Independent keys control module and warning circuit;
Wherein, controller is connected with single-chip minimum system by serial communication, and motor drive module is connected with drive current detection module and stepper motor;
Single-chip minimum system is also connected with motor drive module, drive current detection module, temperature detecting module, numeral method module, Independent keys control module and warning circuit respectively;
Drive current detection module, obtains the rotary speed information of motor, positional information and acceleration information for the ripple current according to this power windows motor; Judge whether vehicle window runs into obstruction by the rotary speed information of this motor and ripple current;
Single-chip minimum system, for when drive current detection module judges that vehicle window runs into obstruction, passes to controller by judged result;
Controller, for controlling power windows stopping or reverse.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310650359.9A CN103711403B (en) | 2013-12-06 | 2013-12-06 | The anti-clip control method of automobile electric car-window and system |
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| CN201310650359.9A CN103711403B (en) | 2013-12-06 | 2013-12-06 | The anti-clip control method of automobile electric car-window and system |
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| CN103711403A CN103711403A (en) | 2014-04-09 |
| CN103711403B true CN103711403B (en) | 2016-01-20 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106124990B (en) * | 2016-06-30 | 2019-05-31 | 北京经纬恒润科技有限公司 | A kind of stall detection method and device |
| CN106499289B (en) * | 2016-10-13 | 2018-12-21 | 上汽通用汽车有限公司 | A kind of automobile electric car-window position judging method and system |
| CN109025645A (en) * | 2018-09-17 | 2018-12-18 | 北京市地铁运营有限公司 | A kind of method of controlling security and system of subway shield door |
| CN111005642A (en) * | 2019-12-26 | 2020-04-14 | 中山市领越电子科技有限公司 | Anti-clamping device for automobile window |
| CN111169332B (en) * | 2020-01-08 | 2021-07-27 | 广汽零部件有限公司 | Anti-pinch control method for electric automobile seat |
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