CN1719242A - Rain water sensor and its use - Google Patents
Rain water sensor and its use Download PDFInfo
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- CN1719242A CN1719242A CN 200510019114 CN200510019114A CN1719242A CN 1719242 A CN1719242 A CN 1719242A CN 200510019114 CN200510019114 CN 200510019114 CN 200510019114 A CN200510019114 A CN 200510019114A CN 1719242 A CN1719242 A CN 1719242A
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- rainwater
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- perceptron
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Abstract
The present invention relates to a rainwater sensor. It is formed from two groups of metal foil strips attached to an insulant baseplate surface and insulating water-proofing layer attached to the surface of said two groups of metal foil strips. Said two groups of metal foil strips are formed into two electrodes of capacitor. Said invention also provides the application of the above-mentioned rainwater sensor in preparation of automatic wiper controller. Besides, said invention also provides its working principle.
Description
Technical field
The present invention relates to a kind of rainwater perceptron and uses thereof.
Background technology
On medium-to-high grade car, it has been inexorable trend that the automatic wiper device replaces the conventional manual Wiping device.In recent years, the automatic wiper device of installing on the car adopts the photo-electric rain sensor substantially both at home and abroad, the weak point of such device is on the high side, and versatility is not good enough, and the Control Software of device needs to make to measure according to vehicle, the material of preceding shelves glass and the difference of setting angle.
Summary of the invention
The invention provides a kind of simple in structure and can perception the rainwater perceptron and uses thereof of rainfall size.
Technical scheme provided by the invention is: a kind of rainwater perceptron, constitute by the insulating waterproof layer that reaches attached to two groups of metals pool bar surfaces attached to two groups of metal pool bars on the insulation material base plate face, and these two groups of metals pool bars constitute the two poles of the earth of capacitor.
Above-mentioned insulation material base plate face is plane or curved surface.
The surface of above-mentioned insulating waterproof layer is a curved surface.
Above-mentioned two groups of metals pool bar and insulating waterproof layer top are provided with the metal cap that connects firmly with the material base plate that insulate, and metal cap is provided with some inlet openings.
During insulating waterproof layer above rainwater drops on metal pool bar, because the thickness of insulating waterproof layer is definite value, thereby the variation of rainfall can change the electric capacity that the specific inductive capacity of electric capacity perform region has changed perceptron.
The present invention also provides the application of above-mentioned rainwater perceptron in making wiper controller.
The present invention is owing to adopt said structure, rainwater drops on the rainwater perceptron, rainwater perceptron is corresponding electric signal with the size conversion of rainfall, this electric signal can be realized monitoring to rainfall by control circuit, so be used for need to whether rainy or rainfall change and take the regulating and controlling of control measure.Especially can satisfy wiper motor three retaining (high and low, intermittently) speed governing requirement fully.Rainwater perceptron of the present invention is simple in structure, is convenient to promote the use of.
Description of drawings
Fig. 1 is the synoptic diagram that rainwater perceptron of the present invention is used in the automatic wiper controller;
Fig. 2 is a rainwater perceptron structural representation of the present invention;
Fig. 3 is the rainwater perceptron structural representation that the present invention has metal cap;
Fig. 4 is the A-A cut-open view of Fig. 3;
Fig. 5 is rainwater perceptron signal condition and A/D change-over circuit schematic diagram;
Fig. 6 be house dog and power supply supervisory circuit, rain shaving electrical machine alignment circuit, rain shaving electrical machine rotating speed trimming circuit and memory circuit and they respectively with the catenation principle figure of microprocessor.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail:
As shown in Figure 1, the output signal of the rainwater perceptron in rainwater perceptron and the signal conditioning circuit 1 thereof connects with the input of signal conditioning circuit, the output terminal of signal conditioning circuit links to each other with the input end of A/D change-over circuit 2, the I/O mouth of the output terminal of A/D change-over circuit 2 and control end and microprocessor 3 joins, and the I/O pin of microprocessor 3 links to each other with the input end of rain shaving electrical machine alignment circuit 5.
Rainwater perceptron shown in Fig. 2, Fig. 3, Fig. 4 is made of the insulating waterproof layer 10 that reaches attached to two groups of metals pool bar surfaces attached to two groups of metal pool bars 9,11 on the insulation material base plate 8 plate faces, these two groups of metal pool bars 9,11 constitute the two poles of the earth of capacitor, and two groups of metal pool bars 9,11 link to each other with the signal conditioning circuit input end by lead a, b.Insulative water-proof coating 10 is close on the rainwater perceptron surface, but the rainfall size on this coating is beaten in perception, has characteristics such as highly sensitive, that response is fast.Two groups of metal pool bars 9,11 and the metal cap 12 that insulating waterproof layer 10 tops also can be provided with and the material base plate 8 that insulate connects firmly, metal cap is provided with some inlet openings 13.The surface of insulative water-proof coating 10 preferably is made as curved surface and (realizes as being made as curved surface by the material base plate face 8 that will insulate, perhaps only the surface treatment of water-proof coating 10 is become curved surface), so that the rainwater on the insulative water-proof coating 10 is wandering, help identification and measurement that rainwater perceptron changes rainfall.The metal cap 12 that is fixed on base plate 8 is answered ground connection (bonding), thereby forms the protection utmost point with shielding action, has anti-electromagnetic interference function (for the very little occasion of electromagnetic interference effect, also can consider to omit metal cap) preferably.
Among Fig. 5, rainwater perceptron of the present invention and signal conditioning circuit 1 thereof have comprised ICL8038 sine-wave generator circuit, the metering circuit U4 of rainwater perceptron JS, sinusoidal wave 90-degree phase shifter U1A, the sinusoidal wave amplitude adjusting circuit U1B of phase shift, sine wave/square wave conversion circuit U2A.As rainfall appears, and the size of rainfall is converted to the variation of the electric signal of JS output in real time, and the sinusoidal voltage amplitude of U4 output is proportional to the JS output signal.The output signal of ICL8038 sine-wave generator circuit is the driving source of the metering circuit U4 of JS, is again the derived reference signal of sinusoidal wave 90-degree phase shifter, and this is exported one the tunnel and meets JS, and one the tunnel connects sinusoidal wave 90-degree phase shifter U1A input end.Sinusoidal wave 90-degree phase shifter U1A exports sinusoidal wave amplitude adjusting circuit U1B to, after sine wave/square wave conversion circuit U2A finishes waveform transformation, export the switch control end of analog switch 4066A again to, the input end of analog switch 4066A links to each other with JS metering circuit U4 output terminal, so the same frequency square wave behind the sinusoidal signal of JS metering circuit U4 output and phase shift 90 degree is realized related operation by analog switch 4066A, operation result exports active low-pass filter U6 to, the electric signal of JS output is big more, the amplitude of active low-pass filter U6 input signal is big more, and the level amplitude that this input signal is converted to level signal output is just big more.The output of active low-pass filter U6 inserts the zeroing circuit input end of being made up of transport and placing device U8, U9 and D/A conversion chip DAC0832 through in-phase amplifier U7: the P0P2P3I/O mouth of DAC0832 input end and corresponding controling end and microprocessor AT89C51 joins, DAC0832 output terminal and transport and placing device U8 input end join, and the U8 output terminal inserts the U9 input end.The U9 output terminal inserts A/D converter U11 (AD574) input end, the P0P2I/O mouth of the output terminal of U11 and corresponding controling end and microprocessor AT89C51 joins, and whether microprocessor can read in the U11 transformation result by the I/O mouth and rain and the size of rainfall to judge.
Among Fig. 6, for guaranteeing the microprocessor reliably working, the present invention also can adopt watchdog circuit U12, this circuit is that core is built with microprocessor monitors chip MAX813L, the control pin of this chip links to each other with the P1.7I/O pin of microprocessor AT89C51, this chip output pin links to each other with the REST pin of microprocessor AT89C51, as the race of microprocessor AT89C51 control program being flown or power-down conditions taking place, microprocessor monitors chip MAX813L will export reset signal so that microprocessor AT89C51 recovers normally to move by Sheffer stroke gate U13A or door U14A.Rain shaving electrical machine alignment circuit of the present invention (5) is by photo-coupler OPTO; high-power FET Q2; protection diode D2; rain shaving electrical machine MOTOR and sustained diode 1 are formed; photo-coupler OPTO input end links to each other with the P1.2I/O pin of microprocessor AT89C51; photo-coupler OPTO output terminal links to each other with the grid of high-power FET Q2; protection diode D2 negative electrode links to each other with the drain electrode of Q2; protection diode D2 anode links to each other with the source electrode of high-power FET Q2; the drain electrode of high-power FET Q2 connects accumulator+12 volt power supply by rain shaving electrical machine MOTOR; sustained diode 1 negative electrode links to each other with accumulator+12 a volt power supply, and sustained diode 1 anode links to each other with the drain electrode of high-power FET Q2.The driver can be by two key change rotating speed amount trimmed of rain shaving electrical machine rotating speed trimming circuit (6), and the rotating speed amount trimmed is big more, and the windscreen wiper rotating speed of motor is fast more under the equal rainfall condition."+1 " key in the rain shaving electrical machine rotating speed trimming circuit (6) is rotating speed amount trimmed 1 key that progressively increases, " 1 " key is rotating speed amount trimmed 1 key that successively decreases, the output signal of two buttons also links to each other by the external request signal input pin INT0 with door U15 and microprocessor AT89C51 except that the P1.0P1.1I/O pin that is connected to microprocessor AT89C51.Whenever press primary key, microprocessor AT89C51 carries out interrupt service routine: the P2.0I/O pin of microprocessor AT89C51 drives loudspeaker SPEAKER1 by transistor Q1 and rings one, after amount trimmed is progressively increased or successively decreased its write storage circuit is preserved finishing.Memory circuit mainly adopts Serial E EPRROM chip 24WC01, and its SDA, SCL pin constitute I2C bus annexation with the P2.1P2.2I/O pin of microprocessor AT89C51 respectively.Microprocessor AT89C51 is according to the rainfall transformation result of the A/D converter U11 that reads in, and the size of reference rotation velocity amount trimmed, corresponding change P1.2I/O pin is to the dutycycle size of PWM (width modulation) drive signal of rain shaving electrical machine alignment circuit (5) output, thereby realization is to the PWM speed governing of rain shaving electrical machine MOTOR.
Rainwater perceptron of the present invention is identification snowflake, sleet directly, the snow melt measure of needn't heating, but when using winter, energy savings not only, and it is simple to have technology, and delicate structure is convenient to install all advantages; The variation of rainfall (snowflake, sleet) size outputs to the A/D change-over circuit through the rainwater perceptron signal conditioning circuit, insert embedded microprocessor behind the sample quantization, the control rain shaving electrical machine is operated in optimum speed and blocks (high and low, intermittently three retaining speed governing) after the embedded microprocessor computing.Rainwater perceptron of the present invention is used for wiper controller, has 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, the workplace of rain shaving electrical machine stepping speed governing such as diesel locomotive.
In addition, rainwater perceptron of the present invention be can be used for other take control measure by the rainfall signal control device.
Claims (6)
1. a rainwater perceptron is made of the insulating waterproof layer that reaches attached to two groups of metals pool bar surfaces attached to two groups of metal pool bars on the insulation material base plate face, and these two groups of metals pool bars constitute the two poles of the earth of capacitor.
2. rainwater perceptron according to claim 1 is characterized in that: the surface of described insulating waterproof layer is a curved surface.
3. rainwater perceptron according to claim 1 and 2 is characterized in that: described insulation material base plate face is the plane.
4. rainwater perceptron according to claim 1 and 2 is characterized in that: described insulation material base plate face is a curved surface.
5. rainwater perceptron according to claim 1 and 2 is characterized in that: two groups of metal pool bars and the metal cap that the insulating waterproof layer top is provided with and the material base plate that insulate connects firmly, metal cap is provided with some inlet openings.
6. claim 1 or the 2 described rainwater perceptrons application in making the automatic wiper controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510019114 CN1719242A (en) | 2005-07-19 | 2005-07-19 | Rain water sensor and its use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510019114 CN1719242A (en) | 2005-07-19 | 2005-07-19 | Rain water sensor and its use |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1719242A true CN1719242A (en) | 2006-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510019114 Pending CN1719242A (en) | 2005-07-19 | 2005-07-19 | Rain water sensor and its use |
Country Status (1)
| Country | Link |
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| CN (1) | CN1719242A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866051B (en) * | 2006-05-31 | 2010-05-12 | 武汉大学 | Rain gauge |
| CN102944586A (en) * | 2012-10-31 | 2013-02-27 | 青岛轩汇仪器设备有限公司 | Capacitive rain and snow sensor |
| CN104330115A (en) * | 2014-11-21 | 2015-02-04 | 天津泰特热控科技有限公司 | Ice and snow sensor |
-
2005
- 2005-07-19 CN CN 200510019114 patent/CN1719242A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866051B (en) * | 2006-05-31 | 2010-05-12 | 武汉大学 | Rain gauge |
| CN102944586A (en) * | 2012-10-31 | 2013-02-27 | 青岛轩汇仪器设备有限公司 | Capacitive rain and snow sensor |
| CN104330115A (en) * | 2014-11-21 | 2015-02-04 | 天津泰特热控科技有限公司 | Ice and snow sensor |
| CN104330115B (en) * | 2014-11-21 | 2016-06-08 | 天津泰特热控科技有限公司 | Ice and snow sensor |
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