CN2590813Y - Intelligent vehicle wipers - Google Patents
Intelligent vehicle wipers Download PDFInfo
- Publication number
- CN2590813Y CN2590813Y CN 02290399 CN02290399U CN2590813Y CN 2590813 Y CN2590813 Y CN 2590813Y CN 02290399 CN02290399 CN 02290399 CN 02290399 U CN02290399 U CN 02290399U CN 2590813 Y CN2590813 Y CN 2590813Y
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- circuit
- wiper
- rain
- windscreen wiper
- electrical motor
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Abstract
The utility model discloses a novel intelligent vehicle wiper, which is characterized in that the top part of a vehicle is provided with a specially designed rain quantity sensor in a direction opposite to wind. The utility model can identify and detect the quantity of rain (snow, frozen rain) at real-time; a single chip machine is used for instructing a wiper motor to automatically work in an optimum speed (level) state; a driver can always get a favorable sight line without frequent manipulation. The intelligent vehicle wiper uses an alternating current rain quantity detecting circuit with a capacitor preventing mess, the measures of correlator technology, etc., has the advantages of strong anti-interference capability, good real-time performance, high performance-price ratio, etc., and can be used for corresponding working occasions of various vehicles, yachts, etc.
Description
Technical field
The utility model relates to a kind of screen wiper.
Background technology
When running car during in the sleet sky, preceding windscreen promptly can be smudgy, for guaranteeing chaufeur good sight line arranged, and all is equiped with wiper and wash mill on the automobile.Traditional vehicle wiper has increased the operating frequency of chaufeur usually by the rotating speed or the wiper intermittent use time of hand switch control windscreen wiper electrical motor.
The utility model content
The utility model provides a kind of intelligent wiper at the problems referred to above exactly, and it can in time adjust the rotating speed of windscreen wiper electrical motor automatically with the variation of rainfall, thereby realizes the preferable control to wiper; Need not can keep good sight line by chaufeur frequent operation wiper hand switch.
The technical scheme that the utility model provides is: a kind of screen wiper, comprise windscreen wiper, drive reciprocating windscreen wiper electrical motor of windscreen wiper and transmission device, it is characterized in that: be provided with rain sensor, rainfall signal detection and modulate circuit, micro controller system and control interface circuit thereof, with windscreen wiper electric electromechanics bonded assembly rain shaving electrical machine alignment circuit, the input of the mouth of rain sensor and rainfall signal detection and modulate circuit links, after rainfall signal detection and modulate circuit the signal conditioning to rain sensor, the output corresponding signal is to micro controller system, and micro controller system output control signal is by the work of control interface circuit control rain shaving electrical machine alignment circuit.
The capacitor plate of above-mentioned rain sensor and electrical isolation parallel with one another by some and with capacitor plate be fixed into holistic, constitute with the bolt of capacitor plate electrical isolation.
Described rain sensor also can be provided with shell, and shell is provided with into rain mouth and rainwater outlet.
Above-mentioned rainfall signal detection and modulate circuit are formed sinusoidal waveform/square wave conversion circuit, analog switch and active low-pass filter by sine wave generator, capacitance measurement circuit, sinusoidal waveform 90-degree phase shifter, phase shift sinusoidal waveform amplitude adjusting circuit, comparator and Smitt binary pair and are formed, sine wave generator output connects the input end of capacitance measurement circuit and sinusoidal waveform 90-degree phase shifter, the mouth of capacitance measurement circuit and sinusoidal waveform 90-degree phase shifter is connected to analog switch, and analog switch output is connected to source low-pass filter input end.
The utility model also can be provided with temperature sensor and testing circuit and defrost heating arrangement, wherein temperature sensor and testing circuit are made up of temperature sensor, voltage reference circuit, bridge for measuring temperature and comparator, temperature sensor causes the variation of the output voltage of bridge for measuring temperature, this voltage inserts comparator input terminal, and the output of voltage reference circuit is as the operating voltage of bridge for measuring temperature.
Above-mentioned defrost heating arrangement is made up of four PTC constant temperature heating plates of forming after water-proofing treatment and (accordingly) relay, and heating plate links to each other with power supply through the contact of relay.
The utility model can in time be adjusted the rotating speed of windscreen wiper electrical motor automatically with the variation of rainfall, thereby realizes the optimal control to wiper; And can control the wiper electrical motor and be operated in corresponding rotating speeds, chaufeur need not can remain best line-of-sight by frequent operation wiper hand switch.The utlity model has reliable operation, antijamming capability is strong, and real-time is good, and the cost performance advantages of higher can be widely used in all kinds of automobiles, corresponding work occasions such as speedboat.
Description of drawings
Fig. 1 is a formation block diagram of the present utility model;
Fig. 2 is the structural representation of rain sensor of the present utility model;
Fig. 3 is the left view of Fig. 2;
Fig. 4 is rainfall signal detection of the present utility model and modulate circuit figure;
Fig. 5 is micro controller system of the present utility model and control interface circuit diagram thereof;
Fig. 6 is a power circuit diagram of the present utility model;
Fig. 7 is mode of operation change-over switch of the present utility model and windscreen wiper motor speed adjustment circuit diagram.
The specific embodiment
Be example with three fast wipers (low speed 27/s, middling speed 36/s, high speed 45/s) below, reach embodiment in conjunction with the accompanying drawings the utility model is described in further detail:
Referring to Fig. 1, the utility model comprises rain sensor 2, rainfall signal detection and modulate circuit 3, temperature sensor and testing circuit 1, micro controller system and control interface circuit 4 thereof, automanual mode of operation change-over switch and windscreen wiper motor speed adjustment circuit 5, defrost heating arrangement 6, watchdog microcontroller circuit 7, windscreen wiper and driving windscreen wiper pulsating motor and transmission device 8.
The core component of rain sensor 2 of the present utility model as shown in Figures 2 and 3 is 8 group capacitors, and capacitor plate 10 is stainless steel sheets of 16 0.5mm thickness, and multi-plate condenser pole plate 10 is parallel with one another to hold rainfall with increase.Described rain sensor 2 also can be provided with shell 15, shell 15 is provided with into rain mouth 9 and rainwater outlet 13, connect firmly at multi-plate condenser pole plate 10 and connect firmly on shell 15, capacitor plate 10 is connected with rainfall signal detection and modulate circuit 3 by positive and negative electrode wiring 16,17.It is in aggregates that four bolts 12 with capacitor plate 10 electrical isolations are fixed 8 group capacitors, and structural arrangement becomes through type, and the rainwater of flows into capacitor device can flow away from roof of the vehicle by through type capacitor plate 10.By the cond principle as can be known, 10 permittivity of a media of capacitance and capacitor plate are relevant, and promptly the size of capacitance is relevant with the size of rainfall.The capacitor sensor structure that the utility model utilizes medium (rainfall) to form can solve the measurement of rainfall size effectively, and have highly sensitive, response is fast, be easy to characteristics such as flushing.
Rainfall signal detection of the present utility model and modulate circuit 3 (see figure 4)s are formed the 10KHZ sine wave generator by U1D (741) and peripheral cell thereof, U11A (OP07) and peripheral cell thereof are formed the metering circuit of capacitance Cx in the rain sensor 2, U1A (741) and peripheral cell thereof are formed the sinusoidal waveform 90-degree phase shifter, U1B (741) and peripheral cell thereof are formed phase shift sinusoidal waveform amplitude adjusting circuit, and U1C (741) and peripheral cell thereof and Smitt binary pair U4A, U4B (CD40106) form sinusoidal waveform/square wave conversion circuit.When wiper mode of operation change-over switch Switch (see figure 7) switched to automatic mode, circuit of the present utility model just put into operation, as rainfall occurs, and the size of rainfall is converted to the variation of Cx capacitance in real time.Be connected the capacitor C s1 at Cx two ends and CS2 among Fig. 4 and be the equivalent stray capacitance between rain sensor connecting cable and the ground.When Rf is enough big, the output voltage V c=-of U11A (Cx*Vi)/Cf, promptly Shu Chu sinusoidal voltage amplitude is proportional to Cx.In this circuit, the Cs1 equivalence is in parallel with the sine wave signal of U1D, and the existence of its equivalent capacity does not produce the electric current that flows to U11A by Cx, can ignore the output influence of U11A; Cs2 links to each other with the inverting input of U11A and is in the virtual earth state always, its existence can not exert an influence to the output of U11A yet, so the design of this part circuit can suppress the influence of stray capacitance preferably, guaranteed the reliability and the precision of rainfall size result of a measurement.The output signal of sine wave generator is the signal source of the metering circuit of Cx, is again the derived reference signal of sinusoidal waveform 90-degree phase shifter, and this exports one tunnel metering circuit input end that meets capacitor C x, and one the tunnel connects sinusoidal waveform 90-degree phase shifter input end.The sinusoidal waveform 90-degree phase shifter exports the sinusoidal waveform amplitude adjusting circuit to, after finishing waveform transformation, sinusoidal waveform/square wave conversion circuit exports the switch control end of analog switch U5A (CD4016) to, the corresponding input end of U5A links to each other with capacitor C x metering circuit mouth, so the same frequency square wave behind the sinusoidal signal of Cx metering circuit output and phase shift 90 degree is realized related operation by analog switch U5A, thereby has improved the anti-noise ability of system effectively.Operation result inputs to the active low-pass filter of U3 (741) and peripheral cell composition thereof, and Cx is big more, and the amplitude of this incoming signal is big more.Active low-pass filter converts this incoming signal to level signal output at last, the amplitude of incoming signal is big more, the level amplitude of output is just big more, thereby rainfall signal detection and modulate circuit just effectively change into the size variation of Cx the size variation of level amplitude.In order to ensure Cx measuring reliability and precision, this circuit has adopted dual power supply amplifier chip.
Three comparator U7A, U7B among the output of active low-pass filter level among Fig. 4 and Fig. 5 and the in-phase input end of U7C (741) link to each other, these three comparator inverting input level sizes be respectively representative little, in, the critical value of heavy rain, these three comparator output terminals link to each other with micro controller system (80C51) respective pin P1.0, P1.1, P1.2 respectively.Whether micro controller system just can be judged by the situation of inquiring about these several pin level and changing and rain and the size of rainfall, and the signal of exporting corresponding control through respective pin P1.3, P1.4, P1.5 amplifies through Q1, Q2, Q3, drive tachometric relay CA, CB and CD and act accordingly, thus the unlatching and the rotating speed of control windscreen wiper electrical motor.For guaranteeing the micro controller system reliable operation, micro controller system among Fig. 5 and control interface circuit thereof have also adopted watchdog circuit 7, this circuit is that core is built with microprocessor monitors chip MAX813L, the control pin of this chip links to each other with micro controller system P1.7 pin, output pin links to each other with micro controller system REST pin, as the SCM program race being flown or power-down conditions taking place, MAX813L will export reset signal so that micro controller system recovers normal operation.Wiper device of the present utility model also can with the Single Chip Microcomputer (SCM) system compatibility on the existing automobile.
In view of only having on the automobile+the 12V power supply, so the utility model has adopted the power-switching circuit of being made up of as shown in Figure 6 U6 (CW34063) and peripheral cell thereof, its handle+12V input is transformed into-12V output, U9 (7805) then is transformed into+12V input+5V output, to satisfy each related chip of system needs different to power line voltage.
The windscreen wiper electrical motor is the propulsion source of wiper system works, can be divided into two kinds of wire wound and magnetos by its magnetic field structure, wherein the latter to have a volume little, in light weight, advantages of simple structure and simple at home and abroad is widely adopted on the automobile.For reaching the optimal control purpose, the windscreen wiper electrical motor adopts three fast permanent-magnetic electric machine or stepless speed-regulating motors, and also can adopt two speed motors or transform old-fashioned two speed motors by methods such as series connected coil numbers between the positive negative brush of change motor is three fast mode of operation.When mode of operation change-over switch Switch switches to automatic mode of operation in Fig. 7 circuit ,+12V power supply ,+T is communicated with+B, and rain brush stop position control end+N is communicated with+S.When requiring the slow running of windscreen wiper electrical motor as micro controller system detection rainfall result, slow-speed relay CA energising, its normal opened contact CA1 closure, power supply+T by+B, CA1, windscreen wiper electrical motor "+1 " terminal, windscreen wiper electrical motor and bonding, electric current is through electrical motor "+1 " when terminal enters electrical motor, it is many to seal in coil number, and electrical motor slowly runs; When rainfall becomes big, when requiring the work of windscreen wiper electrical motor middling speed as micro controller system detection rainfall result, micro controller system is exported the normal opened contact CA1 of the disconnection relay CA of signal elder generation of corresponding control, connect middling speed relay CB again, its normal opened contact CB1 closure, power supply+T by+B, CB1, windscreen wiper electrical motor "+2 " terminal, windscreen wiper electrical motor and bonding, electric current is through electrical motor "+2 " when terminal enters electrical motor, seal in coil number and reduce, the electrical motor middling speed is rotated; When rainfall is very big, micro controller system also can instruct windscreen wiper electrical motor high speed operation, micro controller system is exported the normal opened contact CB1 of the disconnection relay CB of signal elder generation of corresponding control, connect fast relay CD again, its normal opened contact CD1 closure, this moment, electric current entered electrical motor through electrical motor "+3 " terminal, and it is minimum to seal in coil number, the electrical motor high speed rotating.When rainfall changed from small to big, micro controller system was controlled in real time and is increased the windscreen wiper electromotor velocity; When rainfall reduced, micro controller system was controlled the speed that reduces the windscreen wiper electrical motor again after time-delay a period of time earlier, have best line-of-sight to guarantee chaufeur.After rainfall stops, micro controller system is also delayed time earlier and is disconnected relay CA, CB and CD again after a period of time, fail to brandish the extreme lower position stop and influence pilot's line of vision as rain brush, establishing cam activated switch K in the windscreen wiper electrical motor will beat to the left side, electric current through K, operational mode switch+S end ,+N end, relay normally closed switch CA2, CB2 and CD2, windscreen wiper electrical motor "+1 " end, windscreen wiper electrical motor and bonding, electrical motor continues to slowly run, when rain brush is brandished extreme lower position, cam activated switch K beats automatically to the right side, current return disconnects, and electrical motor stops operating.The windscreen wiper Duty of Electric Motors is also changeable to be manual mode, and its principle of work is identical with traditional approach.This screen wiper also is equipped with washing system, before the needs hydro-peening during windscreen, opens hydro-peening shelves among the mode of operation change-over switch Switch to " ON " state, and hydro-peening electrical motor D devotes oneself to work and can finish this function.
In order finishing debating of snowfall and sleet to be known and measurement, in this screen wiper, also to be provided with temperature sensor 18 (see figure 3)s and testing circuit (see figure 4) and defrost heating arrangement 6 (see figure 7)s.Temperature sensor 18 adopts TD1A, and response time less than equaling 5 seconds, adopts the LM10 chip to constitute reference circuit to guarantee the voltage accuracy of bridge for measuring temperature in moving air in the circuit.Defrost heating arrangement 6 mainly is made up of four PTC constant temperature heating plate 11 and corresponding relays of forming after water-proofing treatment, heating plate 11 connects firmly in sensor outer housing 15 inboards (referring to Fig. 2,3, for reducing thermal loss, sensor outer housing 15 can adopt interlayer, interior folder aluminium silicate particle 14 is heat insulation), heating plate 11 links to each other with power supply on the automobile through the contact of relay.The temperature sensor TD1A that is installed in automobile case is connected to the in-phase end of comparator U11, when temperature outside the car is lower than 4 ℃ when spending, comparator U11 output low level is to the INT1 end of micro controller system, micro controller system outage service routine, inquiry P1.0, P1.1, the situation that these several pin level of P1.2 change, as judge and sleet or snowfall have occurred, just the signal of exporting corresponding control through respective pin P1.6 amplifies through Q4, commands relays CN energising, its normal opened contact CN1 closure, 6 work of defrost heating arrangement, rain sensor 2 temperature rise rapidly, with snowfall on the sensor 2 or sleet melt into H
2O liquid finally after micro controller system is handled, controls to wiper on the corresponding rotating speeds.When snowfall and sleet changed from small to big, the wiper rotating speed promoted immediately; In the time of from large to small, the time-delay of wiper rotating speed reduces, and with windscreen before guaranteeing higher scraping rate is arranged.
Rain sensor of the present utility model can be installed in the automobile top direction of facining the wind, be positioned at the wiper control circuit part of bridge controller by cable connection, thereby the variation of rainfall size can change the variation that the size of rain sensor capacitance detects electric signal in real time, this electric signal offers micro controller system (snowflake behind pretreatment, sleet also can be converted to the variation of capacitance in real time), control windscreen wiper electrical motor is operated in (height on optimum speed (infinite speed variation) or the optimum speed shelves after the micro controller system computing, in, low third gear speed governing), have good sight line to guarantee chaufeur.
The utility model adopts means such as exchanging anti-stray capacitance rainfall testing circuit, correlator technology to have reliable operation, and antijamming capability is strong, and real-time is good, and the cost performance advantages of higher can be widely used in all kinds of automobiles, corresponding work occasions such as speedboat.
Claims (10)
1. screen wiper, comprise windscreen wiper, drive reciprocating windscreen wiper electrical motor of windscreen wiper and transmission device, it is characterized in that: be provided with rain sensor, rainfall signal detection and modulate circuit, micro controller system and control interface circuit thereof, with windscreen wiper electric electromechanics bonded assembly rain shaving electrical machine alignment circuit, the input of the mouth of rain sensor and rainfall signal detection and modulate circuit links, after rainfall signal detection and modulate circuit are handled the output signal of rain sensor, the output corresponding signal is to micro controller system, and micro controller system output control signal is by the work of control interface circuit control rain shaving electrical machine alignment circuit.
2. screen wiper according to claim 1 is characterized in that: the capacitor plate of rain sensor and electrical isolation parallel with one another by some and with capacitor plate be fixed into holistic, constitute with the bolt of capacitor plate electrical isolation.
3. screen wiper according to claim 2, it is characterized in that: rain sensor is provided with shell, and shell is provided with into rain mouth and rainwater outlet.
4. according to claim 1 or 2 or 3 described screen wipers, be characterised in that: rainfall signal detection and modulate circuit are by sine wave generator, capacitance measurement circuit, the sinusoidal waveform 90-degree phase shifter, phase shift sinusoidal waveform amplitude adjusting circuit, comparator and Smitt binary pair are formed sinusoidal waveform/square wave conversion circuit, analog switch and active low-pass filter are formed, sine wave generator output connects the input end of capacitance measurement circuit and sinusoidal waveform 90-degree phase shifter, the mouth of capacitance measurement circuit and sinusoidal waveform 90-degree phase shifter is connected to analog switch, and analog switch output is connected to source low-pass filter input end.
5. according to claim 1 or 2 or 3 described screen wipers, it is characterized in that: be provided with temperature sensor and testing circuit and defrost heating arrangement, wherein temperature sensor and testing circuit are made up of temperature sensor, voltage reference circuit, bridge for measuring temperature and comparator, temperature sensor causes the variation of the output voltage of bridge for measuring temperature, this voltage inserts comparator input terminal, and the output of voltage reference circuit is as the operating voltage of bridge for measuring temperature.
6. screen wiper according to claim 5 is characterized in that: the defrost heating arrangement is made up of the relay of four PTC constant temperature heating plates of forming after water-proofing treatment and control heating plate, and heating plate links to each other with power supply through the contact of relay.
7. according to claim 1 or 2 or 3 described screen wipers, it is characterized in that: be provided with wiper automatic or manual mode of operation change-over switch.
8. according to claim 1 or 2 or 3 described screen wipers, it is characterized in that: be provided with the watchdog microcontroller circuit, this circuit is that core is built with the microprocessor monitors chip, and the control pin of this chip links to each other with the single-chip processor i/o pin, and output pin links to each other with the micro controller system reseting pin.
9. according to claim 1 or 2 or 3 described screen wipers, be characterised in that: windscreen wiper motor speed adjustment circuit is made up of automotive battery, ignition lock, hydro-peening electrical motor, mode of operation change-over switch, relay and windscreen wiper electrical motor, and automotive battery inserts the hydro-peening electrical motor again through mode of operation change-over switch and bonding through ignition lock one road; The windscreen wiper electrical motor is inserted through mode of operation change-over switch and relay in another road.
10. according to claim 1 or 2 or 3 described screen wipers, it is characterized in that: the windscreen wiper electrical motor is three-speed motor, two electric motor with speed, motor with stepless speed regulation or intermittent working type electrical motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02290399 CN2590813Y (en) | 2002-12-17 | 2002-12-17 | Intelligent vehicle wipers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02290399 CN2590813Y (en) | 2002-12-17 | 2002-12-17 | Intelligent vehicle wipers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2590813Y true CN2590813Y (en) | 2003-12-10 |
Family
ID=33749634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02290399 Expired - Fee Related CN2590813Y (en) | 2002-12-17 | 2002-12-17 | Intelligent vehicle wipers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2590813Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103158673A (en) * | 2013-04-08 | 2013-06-19 | 无锡市崇安区科技创业服务中心 | Anti-freezing windscreen wiper of automobile |
| CN114412288A (en) * | 2021-12-17 | 2022-04-29 | 国网山东省电力公司济宁供电公司 | Intelligent rainproof cover for outdoor electromagnetic lock |
-
2002
- 2002-12-17 CN CN 02290399 patent/CN2590813Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103158673A (en) * | 2013-04-08 | 2013-06-19 | 无锡市崇安区科技创业服务中心 | Anti-freezing windscreen wiper of automobile |
| CN114412288A (en) * | 2021-12-17 | 2022-04-29 | 国网山东省电力公司济宁供电公司 | Intelligent rainproof cover for outdoor electromagnetic lock |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |