CN204188827U - A kind of Novel rainfall sensor - Google Patents
A kind of Novel rainfall sensor Download PDFInfo
- Publication number
- CN204188827U CN204188827U CN201320817442.6U CN201320817442U CN204188827U CN 204188827 U CN204188827 U CN 204188827U CN 201320817442 U CN201320817442 U CN 201320817442U CN 204188827 U CN204188827 U CN 204188827U
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- rainfall
- capacitance
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- capacitance detecting
- capacitive transducer
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- 238000004891 communication Methods 0.000 claims abstract description 18
- 239000011521 glass Substances 0.000 claims abstract description 15
- 238000005516 engineering process Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 238000004483 ATR-FTIR spectroscopy Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model openly provides a kind of Novel rainfall sensor, comprising: the capacitive transducer being arranged at glass inner side; Be connected with described capacitive transducer, capacitance detecting is carried out to described capacitive transducer, and described capacitance and demarcation capacitance are compared, obtain rainfall signal to judge the capacitance detecting chip of rainfall size; Be connected with described capacitance detecting chip, receive described rainfall signal by serial communication interface, and the described rainfall signal received is carried out processing and contrasting, by the single-chip microcomputer that rainfall gear signal is sent by K line/CAN line communication interface; Be connected with described single-chip microcomputer with described capacitance detecting chip respectively, for described rain sensor carries out the electric power management circuit of Power supply.A kind of Novel rainfall sensor provided by this utility model accurately can detect rainfall signal adjustment wiper wiping velocities, improves the ride comfort of driver.
Description
Technical field
The utility model relates to technical field of automobile components, in particular, relates to a kind of Novel rainfall sensor.
Background technology
Rain sensor is a kind of sensor for the outside rainfall size of measuring vehicle, and its measuring-signal is supplied to entire car controller or wiper controller, to adjust wiper wiping velocities according to rainfall size.The rainfall monitoring technology of current existence mainly infrared induction detects, and rain sensor is arranged in inside car front windshield windscreen, within the scope of wiper wiper.
Infrared induction monitoring technology is that rain sensor is installed on glass inner side, and the infrared ray utilizing infrarede emitting diode to launch injects glass through optical conductor, utilizes infrared ray to be totally reflected at the interface of glass and air, then receives with the receiver that light activated element is made.When rainy, glass outer surface with raindrop, then changes the optical property of glass and Air Interface, causes ATR-FTIR line transmission path to change, and then the infrared ray power change causing receiver to receive, and carries out the judgement of rainfall size with this.But this detection technique is subject to the impact of the factors such as extraneous light, Glass optical attribute, glass physical dimension, causes rainfall signal inaccurate, control wiper wiping velocities that cannot be real-time, thus reduces the ride comfort of driver.
Therefore, provide a kind of Novel rainfall sensor accurately to detect rainfall signal adjustment wiper wiping velocities, the ride comfort improving driver is those skilled in the art's problem demanding prompt solutions.
Utility model content
In view of this, the utility model provides a kind of Novel rainfall sensor, accurately can detect rainfall signal to adjust wiper wiping velocities, improves the problem of the ride comfort of driver.
For achieving the above object, the utility model provides following technical scheme:
A kind of Novel rainfall sensor, comprising:
Be arranged at the capacitive transducer of glass inner side;
Be connected with described capacitive transducer, capacitance detecting is carried out to described capacitive transducer, and described capacitance and demarcation capacitance are compared, obtain rainfall signal to judge the capacitance detecting chip of rainfall size;
Be connected with described capacitance detecting chip, receive described rainfall signal by serial communication interface, and the described rainfall signal received is carried out processing and contrasting, by the single-chip microcomputer that rainfall gear signal is sent by K line/CAN line communication interface;
Be connected with described single-chip microcomputer with described capacitance detecting chip respectively, for described rain sensor carries out the electric power management circuit of Power supply.
Wherein, the capacitance of the described capacitive transducer measured for core, is sent to described single-chip microcomputer by the serial communication interface of described AD7150 chip with AD7150 chip by described capacitance detecting chip.
Wherein, external power source 12V or 24V is converted into 3.3V or 5V by described electric power management circuit, is respectively described capacitance detecting chip and described single-chip microcomputer is powered.
Known via above-mentioned technical scheme, compared with prior art, the utility model openly provides a kind of Novel rainfall sensor, comprising: the capacitive transducer being arranged at glass inner side; Be connected with described capacitive transducer, capacitance detecting is carried out to described capacitive transducer, and described capacitance and demarcation capacitance are compared, obtain rainfall signal to judge the capacitance detecting chip of rainfall size; Be connected with described capacitance detecting chip, receive described rainfall signal by serial communication interface, and the described rainfall signal received is carried out processing and contrasting, by the single-chip microcomputer that rainfall gear signal is sent by K line/CAN line communication interface; Be connected with described single-chip microcomputer with described capacitance detecting chip respectively, for described rain sensor carries out the electric power management circuit of Power supply.A kind of Novel rainfall sensor provided by this utility model accurately can detect rainfall signal adjustment wiper wiping velocities, improves the ride comfort of driver.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The structural representation of Fig. 1 a kind of Novel rainfall sensor disclosed in the utility model embodiment;
The structural representation of Fig. 2 capacitive transducer disclosed in the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The utility model openly provides a kind of Novel rainfall sensor, comprising: the capacitive transducer being arranged at glass inner side; Be connected with described capacitive transducer, capacitance detecting is carried out to described capacitive transducer, and described capacitance and demarcation capacitance are compared, obtain rainfall signal to judge the capacitance detecting chip of rainfall size; Be connected with described capacitance detecting chip, receive described rainfall signal by serial communication interface, and the described rainfall signal received is carried out processing and contrasting, by the single-chip microcomputer that rainfall gear signal is sent by K line/CAN line communication interface; Be connected with described single-chip microcomputer with described capacitance detecting chip respectively, for described rain sensor carries out the electric power management circuit of Power supply.A kind of Novel rainfall sensor provided by this utility model accurately detects rainfall signal adjustment wiper wiping velocities, improves the ride comfort of driver.
Refer to accompanying drawing 1, a kind of structural representation of Novel rainfall sensor disclosed in the utility model embodiment.The utility model embodiment discloses a kind of Novel rainfall sensor, comprising: the capacitive transducer 1 being arranged at glass inner side; Be connected with described capacitive transducer 1, capacitance detecting is carried out to described capacitive transducer 1, and described capacitance and demarcation capacitance are compared, obtain rainfall signal to judge the capacitance detecting chip 2 of rainfall size; Be connected with described capacitance detecting chip 2, receive described rainfall signal by serial communication interface, and the described rainfall signal received is carried out processing and contrasting, by the single-chip microcomputer 3 that rainfall gear signal is sent by K line/CAN line communication interface; Be connected with described single-chip microcomputer 3 with described capacitance detecting chip 2 respectively, for described rain sensor carries out the electric power management circuit 4 of Power supply.
A kind of Novel rainfall sensor provided above by this utility model accurately can detect rainfall signal adjustment wiper wiping velocities, improves the ride comfort of driver.
Preferably, the electric capacity two-stage of described capacitive transducer 1 is set to the structure that has larger right opposite long-pending in capacitive transducer region one timing.Refer to accompanying drawing 2, the structural representation of capacitive transducer disclosed in the utility model embodiment.Capacitive transducer 1 uses structure as shown in Figure 2, and this structure makes have larger right opposite to amass in capacitor regions S mono-timing between A and B of electric capacity the two poles of the earth, when rainwater falls into capacitor regions S, also can cause the variable quantity that electric capacity is larger.
Wherein, the capacitance of the described capacitive transducer 1 measured for core, is sent to described single-chip microcomputer 3 by the serial communication interface of described AD7150 chip with AD7150 chip by described capacitance detecting chip 2.
Wherein, described single-chip microcomputer 3 receives the capacitance of described capacitive transducer 1, and hang in swiped through journey according to windscreen wiper, scraping blade is by described capacitive transducer region, the changing pattern of the capacitance of the described capacitive transducer 1 caused, filtering scraping blade, through out-of-date capacitance, compares with the electric capacity threshold values demarcated in advance according to the capacitance after filtering, then rainfall signal is changed into according to the rainfall demarcated with the corresponding algorithm of capacitance
Sent by K line or CAN line.
Wherein, external power source 12V or 24V is converted into 3.3V or 5V by described electric power management circuit 4,
Be respectively described capacitance detecting chip 2 and described single-chip microcomputer 3 is powered.
Rain sensor electric capacity threshold values C1 calibration process is:
After rain sensor 1 has been assembled, clean and under the condition of drying at glass surface, to be sent to rain sensor by the K line of single-chip microcomputer 3 or CAN line communication interface and demarcate instruction, single-chip microcomputer 3 records the capacitance in this moment as the rain sensor electric capacity threshold values C1 demarcated.
Rainfall algorithm f1 calibrated corresponding to capacitance C of demarcating is called:
During according to different rainfall amount, the capacitance C of the capacitive transducer 1 that single-chip microcomputer 3 receives, be depicted as broken line graph and be recorded into the internal memory of single-chip microcomputer 3, in using for each, the capacitance C of electricity+appearances sensor 1 that single-chip microcomputer 3 receives uses linear difference algorithm to calculate the rainfall signal V of correspondence.
In sum, the utility model openly provides a kind of Novel rainfall sensor, comprising: the capacitive transducer being arranged at glass inner side; Be connected with described capacitive transducer, capacitance detecting is carried out to described capacitive transducer, and described capacitance and demarcation capacitance are compared, obtain rainfall signal to judge the capacitance detecting chip of rainfall size; Be connected with described capacitance detecting chip, receive described rainfall signal by serial communication interface, and the described rainfall signal received is carried out processing and contrasting, by the single-chip microcomputer that rainfall gear signal is sent by K line/CAN line communication interface; Be connected with described single-chip microcomputer with described capacitance detecting chip respectively, for described rain sensor carries out the electric power management circuit of Power supply.A kind of Novel rainfall sensor provided by this utility model accurately can detect rainfall signal adjustment wiper wiping velocities, improves the ride comfort of driver.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (3)
1. a Novel rainfall sensor, is characterized in that, comprising:
Be arranged at the capacitive transducer of glass inner side;
Be connected with described capacitive transducer, capacitance detecting is carried out to described capacitive transducer, and described capacitance and demarcation capacitance are compared, obtain rainfall signal to judge the capacitance detecting chip of rainfall size;
Be connected with described capacitance detecting chip, receive described rainfall signal by serial communication interface, and the described rainfall signal received is carried out processing and contrasting, by the single-chip microcomputer that rainfall gear signal is sent by K line/CAN line communication interface;
Be connected with described single-chip microcomputer with described capacitance detecting chip respectively, for described rain sensor carries out the electric power management circuit of Power supply.
2. rain sensor according to claim 1, is characterized in that, the capacitance of the described capacitive transducer measured for core, is sent to described single-chip microcomputer by the serial communication interface of described AD7150 chip with AD7150 chip by described capacitance detecting chip.
3. rain sensor according to claim 1, is characterized in that, external power source 12V or 24V is converted into 3.3V or 5V by described electric power management circuit, is respectively described capacitance detecting chip and described single-chip microcomputer is powered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320817442.6U CN204188827U (en) | 2013-12-12 | 2013-12-12 | A kind of Novel rainfall sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320817442.6U CN204188827U (en) | 2013-12-12 | 2013-12-12 | A kind of Novel rainfall sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204188827U true CN204188827U (en) | 2015-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320817442.6U Expired - Lifetime CN204188827U (en) | 2013-12-12 | 2013-12-12 | A kind of Novel rainfall sensor |
Country Status (1)
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| CN (1) | CN204188827U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107264475A (en) * | 2017-07-26 | 2017-10-20 | 中国航空工业集团公司西安飞机设计研究所 | A kind of frontal windshield rain removal system of automatic sensing rainfall |
| CN108729157A (en) * | 2017-04-20 | 2018-11-02 | 杭州思文科科技有限公司 | A kind of airer device |
| CN108729159A (en) * | 2017-04-20 | 2018-11-02 | 杭州思文科科技有限公司 | A kind of Multifunctional clothes airing device |
| CN108729160A (en) * | 2017-04-20 | 2018-11-02 | 杭州思文科科技有限公司 | A kind of clothes hanger |
| CN109649337A (en) * | 2019-01-28 | 2019-04-19 | 合肥京东方光电科技有限公司 | Car bumper glass, the control method of wiper, system, vehicle and storage medium |
| CN111605517A (en) * | 2020-05-11 | 2020-09-01 | 广州橙行智动汽车科技有限公司 | Control method and control device for driving in rainy days, vehicle and storage medium |
| CN113085785A (en) * | 2021-03-18 | 2021-07-09 | 江苏开沃汽车有限公司 | Capacitive sensing wiper system for automobile and working method thereof |
-
2013
- 2013-12-12 CN CN201320817442.6U patent/CN204188827U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108729157A (en) * | 2017-04-20 | 2018-11-02 | 杭州思文科科技有限公司 | A kind of airer device |
| CN108729159A (en) * | 2017-04-20 | 2018-11-02 | 杭州思文科科技有限公司 | A kind of Multifunctional clothes airing device |
| CN108729160A (en) * | 2017-04-20 | 2018-11-02 | 杭州思文科科技有限公司 | A kind of clothes hanger |
| CN107264475A (en) * | 2017-07-26 | 2017-10-20 | 中国航空工业集团公司西安飞机设计研究所 | A kind of frontal windshield rain removal system of automatic sensing rainfall |
| CN109649337A (en) * | 2019-01-28 | 2019-04-19 | 合肥京东方光电科技有限公司 | Car bumper glass, the control method of wiper, system, vehicle and storage medium |
| CN109649337B (en) * | 2019-01-28 | 2020-09-25 | 合肥京东方光电科技有限公司 | Control method and system for vehicle windshield and windscreen wiper, vehicle and storage medium |
| CN111605517A (en) * | 2020-05-11 | 2020-09-01 | 广州橙行智动汽车科技有限公司 | Control method and control device for driving in rainy days, vehicle and storage medium |
| CN113085785A (en) * | 2021-03-18 | 2021-07-09 | 江苏开沃汽车有限公司 | Capacitive sensing wiper system for automobile and working method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150304 |
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| CX01 | Expiry of patent term |