CN102063778A - Singlechip based eyesight protection warning system - Google Patents
Singlechip based eyesight protection warning system Download PDFInfo
- Publication number
- CN102063778A CN102063778A CN 201010536999 CN201010536999A CN102063778A CN 102063778 A CN102063778 A CN 102063778A CN 201010536999 CN201010536999 CN 201010536999 CN 201010536999 A CN201010536999 A CN 201010536999A CN 102063778 A CN102063778 A CN 102063778A
- Authority
- CN
- China
- Prior art keywords
- circuit
- ultrasonic
- ultrasound wave
- chip microcomputer
- ultrasonic wave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a singlechip based eyesight protection warning system, comprising an ultrasonic ranging module, an interface circuit module and a computer which are sequentially connected, wherein the ultrasonic ranging module comprises a singlechip, an ultrasonic wave transmitting circuit and an ultrasonic wave receiving circuit; and the ultrasonic wave transmitting circuit and the ultrasonic wave receiving circuit are respectively connected with the singlechip by signals. The singlechip generates a control signal to control the ultrasonic wave transmitting circuit to transmit an ultrasonic wave, a timer in the interior of the singlechip is started, the ultrasonic wave is reflected back when meeting the display screen of the computer and is received by the ultrasonic wave receiving circuit, and the time for transmitting and then receiving the ultrasonic wave is measured; further a distance is calculated between a human face and the screen; and the computer compares the measured distance with a preset threshold, if the distance is less than the preset threshold, a warning message is popped up on the screen of the computer, thus achieving the aim of protecting eyesight of a user and providing healthy and perfect user experience for the user.
Description
Technical field
The present invention relates to eyesight protection system, particularly relate to a kind of eyesight protection system based on ultrasonic ranging, this system is used for protecting the eyes of computer user.
Technical background
People's eyes are windows that brain and extraneous scene are got in touch, and the eyesight of protection eyes is extremely important.Along with popularizing and the raising of living standard of computer; people are more and more longer to the service time of computer; require also more and more higher; be necessary to design a kind of equipment; the application function of hommization is provided; reach the purpose of protection eyes of user to a certain extent, thereby bring more healthy, more perfect experience for the user.
Ce Ju major technique has by focusing on range finding in the market; on January 10th, 2008; first-elected PC camera intelligence " range finding " new technology in the Z-Star Microelectronics whole world; realize the function of the protection eyes of user of hommization; this technology utilization focuses on the function that range finding realizes protection user eyesight, but this technical costs is higher, the price comparison costliness; and the processing of obtaining behind the image is also cumbersome, and does not also support password to use when revising parameter.
At present, ultrasonic sensor roughly can be divided into two classes: a class is the ultrasound wave that produces with electric means, and a class is the ultrasound wave that produces with mechanical system.Electric means comprises piezo-electric type, magnetostriction type and power type etc.; Mechanical system has jar (unit of capacitance) system flute, the liquid whistle and air-flow siren etc.The frequency of ultrasonic that they produced, power and acoustic wave character have nothing in common with each other, thereby purposes also has nothing in common with each other.In engineering, comparatively commonly used is the piezoelectric-type ultrasonic wave sensor at present.The piezoelectric-type ultrasonic wave sensor is actually the resonance that utilizes piezoelectric crystal and comes work.There are two piezoelectric chips and a sounding board in the inside of piezoelectric-type ultrasonic wave producer.When its two poles of the earth applying pulse signal, and its frequency is when equaling the natural mode shape of piezoelectric chip, and piezoelectric chip will resonate, and drives the sounding board vibration, just produces ultrasound wave.Otherwise, if impressed voltage not between two electrodes when sounding board receives ultrasound wave, will be oppressed piezoelectric chip and vibrate, mechanical energy is converted to electric signal, at this moment be ultrasonic receiver.
Summary of the invention
Purpose of the present invention is exactly on based on hyperacoustic basis; a kind of eyesight protection system based on ultrasonic ranging is provided; this system in the purpose that reaches the protection eyes of user simultaneously; for the user brings more healthy, more perfect experience; this system is to the human body beneficial; make the people feel to loosen, can alleviate modern's study and work living pressure.
Purpose of the present invention is achieved through the following technical solutions:
A kind of SCM Based sight protectio caution system comprises the ultrasonic distance measuring module, interface module and the computing machine that connect successively; Described interface module is usb circuit, serial interface circuit or parallel interface; Described ultrasonic distance measuring module comprises single-chip microcomputer, ultrasonic transmit circuit and ultrasound wave receiving circuit; Described ultrasonic transmit circuit is connected with the single-chip microcomputer signal respectively with the ultrasound wave receiving circuit; Single-chip microcomputer produces control signal, the control ultrasonic transmit circuit is launched ultrasound wave, the timer of single-chip microcomputer inside starts, ultrasound wave runs into computer screen and reflects, receive through the ultrasound wave receiving circuit, the ultrasound wave receiving circuit produces the input capture sign of received signal as the timer of single-chip microcomputer inside, measures ultrasonic signal and receives institute's time spent from being issued to; And then calculate distance between people's face and the screen; The distance that computing machine will obtain to measure compares with preset threshold, less than fair preset threshold, ejects warning message as this distance on computer screen.
For further realizing goal of the invention, described ultrasonic distance measuring module also comprises display circuit and temperature-compensation circuit; Described display circuit is connected with the single-chip microcomputer signal respectively with temperature-compensation circuit.
Described threshold value is preferably 50-70cm.Described threshold value is 60cm more preferably.
Described ultrasonic transmit circuit preferably adopts NE555 timer multivibrator circuit mode to connect.
Described interface module is preferably usb circuit, serial interface circuit or parallel interface.
With respect to prior art, the present invention has following advantage and beneficial effect:
(1) the present invention provides to have the computer eye protection system that accepts for masses on the basis based on ultrasonic ranging.This system provides the application function of hommization, reaches the purpose of protection eyes of user to a certain extent, thereby brings more healthy, more perfect experience for the user.
(2) the intermittent ultrasound wave of miniwatt makes the people feel to loosen to the human body beneficial, can effectively alleviate people's study and work living pressure.
(3) native system low power consuming, low cost.This product lot quantity produces instinct and is controlled in 15 yuan.
(4) native system can be designed as USB interface or directly is integrated on the display, and diversified product is provided, and selects for the user.
(5) comparatively hommization of the INTERFACE DESIGN of native system, the caution friendly interface, and functions such as data modification, cryptoguard are provided, more perfect.
Description of drawings
Fig. 1 is SCM Based sight protectio caution system structured flowchart;
Fig. 2 is a ultrasonic distance measuring module structured flowchart among Fig. 1;
Fig. 3 is the ultrasonic transmit circuit of Fig. 2;
Fig. 4 is the ultrasound wave receiving circuit of Fig. 2;
Fig. 5 is the single chip machine controlling circuit of Fig. 2;
Fig. 6 is the Single-chip Controlling program circuit;
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing, but the scope of protection of present invention is not limited to the scope of embodiment statement.
As shown in Figure 1, SCM Based sight protectio caution system comprises the ultrasonic distance measuring module, interface module and the computing machine that connect successively; Intermittently send low power ultrasound wave by a ultrasonic ranging circuit, utilize the mistiming principle to calculate people's face and calculate distance between the display screen of machine; Connect ultrasonic distance measuring module and computing machine by interface module, make computing machine obtain the distance that ultrasonic distance measuring module is measured; The distance that computing machine will obtain to measure compares with preset threshold, less than preset threshold, ejects corresponding warning message as this distance on computer screen, thereby reaches the purpose of protection eyes of user.This threshold value be eyes to the rational distance of computer screen, preferred 50-70cm, further preferred 60cm.
Interface module can be designed to USB interface, serial line interface or parallel interface as required.USB interface is supported hot plug, can provide power supply, and movability is strong, is relatively accepted by popular; Serial line interface is fewer and feweri application on current computing machine, and is though it is fairly simple, not too suitable; The benefit of parallel interface is ultrasonic distance measuring module can be built on the display, utilizes the parallel interface of display and main frame and computing machine to communicate, and also is a good selection.
As shown in Figure 2, ultrasonic distance measuring module comprises single-chip microcomputer 3, ultrasonic transmit circuit 1, ultrasound wave receiving circuit 2, display circuit 5 and temperature-compensation circuit 4.Ultrasonic transmit circuit 1, ultrasound wave receiving circuit 2, display circuit 5 and temperature-compensation circuit 4 are connected with single-chip microcomputer 3 signals respectively; After single-chip microcomputer 3 produces reset signals, produces a control signal, the driving square wave of the intermittent 40kHz of control ultrasonic transmit circuit 1 generation is launched the ultrasound wave that frequency is 40kHz after being added to ultrasonic transmitter.Simultaneously, the timer of single-chip microcomputer 3 inside starts, after ultrasound wave runs into computer screen and reflects, receive through ultrasound wave receiving circuit 2, handle the back by ultrasound wave receiving circuit 2 and produce a received signal, be used as the input capture sign of the timer of single-chip microcomputer inside, receive institute's time spent thereby measure ultrasonic signal from being issued to, and then measure the distance between people's face and the screen.Simultaneously, because circuit temperature to the influence of the velocity of sound, if do not compensate, will bring certain measuring errors,, designed temperature-compensation circuit for improving the measuring accuracy of system.Temperature-compensation circuit mainly comprises common digital temperature sensor.Record current environment temperature by temperature-compensation circuit 4, read in single-chip microcomputer 3, handle through single-chip microcomputer 3 then, calculate the more accurate velocity of sound,, and on display circuit 5, show corresponding distance measure and Current Temperatures with the more accurate distance of acquisition.For improving the perception degree that the user adjusts the distance, increased display circuit in the ultrasonic distance measuring module, display circuit mainly is miniscope spares such as charactron or LCDs, when obtaining distance, can allow the user obtain room temperature information, kills two birds with one stone.
As shown in Figure 3, ultrasonic transmit circuit utilizes the NE555 timer to produce the driving square wave of 40kHz.Adopt classical NE555 multivibrator circuit connected mode.No. 4 pins of the NE555 timer of ultrasonic transmit circuit are connected oscillation frequency f with single-chip microcomputer 3
0By resistance R
1, R
2And capacitor C
1Decision, i.e. f
0=1.44/[(R
1+ 2R
2) C
1], dutycycle=[(R
1+ R
2)/(R
1+ 2R
2)] 100%.Each element adopts the parameter among the figure, and the 40kHz that the NE555 timer can produce ultrasonic emitting drives square-wave signal, exports at No. 3 pins (OUT).The control signal of single-chip microcomputer 3 is by No. 4 pins (RESET) input of NE555 timer, and may command produces driving square wave intermittently, produces ultrasound wave intermittently thereby drive ultrasonic transmitter.No. 5 pin external capacitors of NE555 timer C
2, only play the effect of uncoupling, generally get 0.01uF.This circuit is simple and practical, and emissive power can be too not high yet, but experiment shows that transmitting range can reach 4m.
As shown in Figure 4, the ultrasound wave receiving circuit adopts the ultrasonic receiver with the transmitter pairing, and the ultrasound wave modulating pulse is become the alternating voltage signal.Infrared receiving chip CX20106A is adopted in the processing of received signal, and received signal is imported by No. 1 pin, and the gain of signal is by No. 2 external resistance R of pin
3And capacitor C
3Decision, resistance R
3More little capacitor C
3Big more, it is high more to gain, but capacitor C
3Cross conference and cause the frequency characteristic variation, generally get 1uF.No. 3 pin connects detection electric capacity, detection capacitor C
4Excessive then sensitivity is low excessively, though the too small sensitivity of electric capacity is better, causes flase drop to survey easily, general value 3.3uF.No. 5 pin outer meeting resistance R
4, being used for being provided with the bandpass filter centre frequency, the big more frequency of resistance is low more, gets 220k Ω among the figure, and centre frequency is 38kHz, and is close with the 40kHz frequency of ultrasonic.No. 6 external integrating capacitor C of pin
5, its value is crossed conference shortens the detection distance, generally gets 330pF.No. 7 pins are output pin, and when the amplitude of input signal dropped on its centre frequency, this pin was a low level by high level transition, and this level is as the look-at-me that receives.
Chip microcontroller control emission receives, temperature survey, range observation, show and with the systemic function of compunlcation.Single-chip microcomputer also is provided with peripheral circuit commonly used, as feed circuit, and reset circuit, single-chip microcomputer 3 models are selected STC89C51; Display circuit can adopt charactron or LCDs, also can save this hardware module, utilizes user interface to be presented on the display of computing machine; Digital temperature sensor adopts digital temperature sensor DS18B20; The usb circuit aspect, because device just is sent to USB interface to the data that measure, and do not need from computing machine to obtain data there, therefore can use USB to change serial port chip CP2101, this chip can become USB interface of computer the serial ports that single-chip microcomputer can directly use.
As shown in Figure 5, the Single-chip Controlling process is: at first, system carries out initialization, then, carries out following operation per 2 seconds:
1. read the temperature value that temperature sensing circuit records, change into data layout and store.
2. the ultrasound wave of Single-chip Controlling ultrasonic transmit circuit emission 2ms starts T simultaneously
0Timer.
3. wait look-at-me is promptly waited for the received signal of echo.
4. after single-chip microcomputer receives look-at-me, enter interrupt service routine, close T
0, calculate ultrasonic emitting to the time that receives, utilize temperature information that the velocity of sound is compensated again, calculate the distance that finally records.
5. the single-chip microcomputer distance that will record sends to USB interface.
6. carry out a display subroutine every 4ms, refresh charactron.
As shown in Figure 6, define a counter, computing machine 3 constantly reads the data of USB mouth, when having data to send here it and the minor increment that sets are compared, if when (promptly above 20s) is less than minor increment more than continuous ten times or ten times, eject the caution window, otherwise return back counter clear 0, can avoid like this user drop into caution apart from the time produce wrong report, can guarantee again the user is played warning function.In addition, user interface also provides functions such as data modification, cryptoguard, and whether can select range of a signal on display as required.
The present invention also has other embodiment, can adopt other square wave generation circuit as ultrasonic emitting, and ultrasound wave receives to handle and can adopt the audio coding integrated chip; Display circuit can adopt LCDs or directly show on computer screen; Interface circuit can adopt serial line interface or parallel interface as required, also can directly be integrated in the display.
During above content be in conjunction with concrete optimal way to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For those skilled in the art, without departing from the inventive concept of the premise, can also make some simple deduction or replace, in the claim that the claims that all should be considered as being submitted to by the present invention are determined.
Claims (6)
1. a SCM Based sight protectio caution system is characterized in that, comprises the ultrasonic distance measuring module, interface module and the computing machine that connect successively; Described interface module is usb circuit, serial interface circuit or parallel interface; Described ultrasonic distance measuring module comprises single-chip microcomputer, ultrasonic transmit circuit and ultrasound wave receiving circuit; Described ultrasonic transmit circuit is connected with the single-chip microcomputer signal respectively with the ultrasound wave receiving circuit; Single-chip microcomputer produces control signal, the control ultrasonic transmit circuit is launched ultrasound wave, the timer of single-chip microcomputer inside starts, ultrasound wave runs into computer screen and reflects, receive through the ultrasound wave receiving circuit, the ultrasound wave receiving circuit produces the input capture sign of received signal as the timer of single-chip microcomputer inside, measures ultrasonic signal and receives institute's time spent from being issued to; And then calculate distance between people's face and the screen; The distance that computing machine will obtain to measure compares with preset threshold, less than fair preset threshold, ejects warning message as this distance on computer screen.
2. SCM Based sight protectio caution system according to claim 1, it is characterized in that: described ultrasonic distance measuring module also comprises display circuit and temperature-compensation circuit; Described display circuit is connected with the single-chip microcomputer signal respectively with temperature-compensation circuit.
3. SCM Based sight protectio caution system according to claim 1 is characterized in that: described threshold value is 50-70cm.
4. SCM Based sight protectio caution system according to claim 3 is characterized in that: described threshold value is 60cm.
5. SCM Based sight protectio caution system according to claim 1 is characterized in that: described ultrasonic transmit circuit adopts NE555 timer multivibrator circuit mode to connect.
6. SCM Based sight protectio caution system according to claim 1 is characterized in that: described interface module is usb circuit or parallel interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010536999 CN102063778A (en) | 2010-11-08 | 2010-11-08 | Singlechip based eyesight protection warning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010536999 CN102063778A (en) | 2010-11-08 | 2010-11-08 | Singlechip based eyesight protection warning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102063778A true CN102063778A (en) | 2011-05-18 |
Family
ID=43999042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010536999 Pending CN102063778A (en) | 2010-11-08 | 2010-11-08 | Singlechip based eyesight protection warning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102063778A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052871A (en) * | 2014-05-27 | 2014-09-17 | 上海电力学院 | Eye protecting device and method for mobile terminal |
| CN104869188A (en) * | 2015-04-28 | 2015-08-26 | 江苏卡罗卡国际动漫城有限公司 | Newspaper reading mobile phone with distance display and alarm device |
| CN105336130A (en) * | 2015-12-15 | 2016-02-17 | 彭举威 | Eye protection instrument having warning function |
| CN105788188A (en) * | 2013-02-21 | 2016-07-20 | 魏国营 | Intelligent home system |
| CN106197333A (en) * | 2016-07-14 | 2016-12-07 | 重庆编福科技有限公司 | A kind of 40KC ultrasonic displacement sensor compressing multipath effect based on time window and matched filtering |
| CN107185107A (en) * | 2017-05-13 | 2017-09-22 | 沈阳赛镝医疗器械有限公司 | A kind of ultrasonic direct current current iontophoresis system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2082611U (en) * | 1990-01-06 | 1991-08-14 | 朱桂棋 | Ultrasonic vision protector for reading or writing |
| CN2096348U (en) * | 1991-04-12 | 1992-02-19 | 中国科学院云南天文台科技开发部 | Vision protector for student |
| CN2105268U (en) * | 1991-04-19 | 1992-05-27 | 保定市新市区供电设备防盗器材厂 | Signal feedback sight protector |
| CN2129435Y (en) * | 1992-09-02 | 1993-04-07 | 史建军 | Eyesight protector |
| CN2510940Y (en) * | 2001-03-22 | 2002-09-11 | 张�杰 | Comprehensive vision health-care voice early-warning device |
| CN2704892Y (en) * | 2004-02-13 | 2005-06-15 | 张�杰 | Eyesight protecters for child |
| CN2741060Y (en) * | 2004-10-27 | 2005-11-16 | 陈国宇 | Ultrasonic range displaying and alarming device in short distance |
| CN2868183Y (en) * | 2006-01-19 | 2007-02-14 | 杨宏军 | Intelligent eyesight protector |
-
2010
- 2010-11-08 CN CN 201010536999 patent/CN102063778A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2082611U (en) * | 1990-01-06 | 1991-08-14 | 朱桂棋 | Ultrasonic vision protector for reading or writing |
| CN2096348U (en) * | 1991-04-12 | 1992-02-19 | 中国科学院云南天文台科技开发部 | Vision protector for student |
| CN2105268U (en) * | 1991-04-19 | 1992-05-27 | 保定市新市区供电设备防盗器材厂 | Signal feedback sight protector |
| CN2129435Y (en) * | 1992-09-02 | 1993-04-07 | 史建军 | Eyesight protector |
| CN2510940Y (en) * | 2001-03-22 | 2002-09-11 | 张�杰 | Comprehensive vision health-care voice early-warning device |
| CN2704892Y (en) * | 2004-02-13 | 2005-06-15 | 张�杰 | Eyesight protecters for child |
| CN2741060Y (en) * | 2004-10-27 | 2005-11-16 | 陈国宇 | Ultrasonic range displaying and alarming device in short distance |
| CN2868183Y (en) * | 2006-01-19 | 2007-02-14 | 杨宏军 | Intelligent eyesight protector |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105788188A (en) * | 2013-02-21 | 2016-07-20 | 魏国营 | Intelligent home system |
| CN104052871A (en) * | 2014-05-27 | 2014-09-17 | 上海电力学院 | Eye protecting device and method for mobile terminal |
| CN104869188A (en) * | 2015-04-28 | 2015-08-26 | 江苏卡罗卡国际动漫城有限公司 | Newspaper reading mobile phone with distance display and alarm device |
| CN105336130A (en) * | 2015-12-15 | 2016-02-17 | 彭举威 | Eye protection instrument having warning function |
| CN106197333A (en) * | 2016-07-14 | 2016-12-07 | 重庆编福科技有限公司 | A kind of 40KC ultrasonic displacement sensor compressing multipath effect based on time window and matched filtering |
| CN107185107A (en) * | 2017-05-13 | 2017-09-22 | 沈阳赛镝医疗器械有限公司 | A kind of ultrasonic direct current current iontophoresis system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102063778A (en) | Singlechip based eyesight protection warning system | |
| US10010248B1 (en) | Instrument for measuring near point of convergence and/or near point of accommodation | |
| CN103869321A (en) | Ultrasonic distance measurement system and method for controlling ultrasonic distance measurement system to measure distance | |
| CN202330713U (en) | Guide collision avoidance device based on multiple ultrasonic sensors | |
| CN103941258A (en) | Ultrasonic rangefinder based on single-chip microcomputer | |
| CN202025082U (en) | High-precision ultrasonic ranging device | |
| CN103364786A (en) | Portable type intelligent distance measurement instrument with voice function | |
| CN103760550A (en) | Handheld depth finder / fish detector / transducer tester | |
| CN204315049U (en) | A kind of bluetooth earphone formula myopia-proof intelligent instrument | |
| CN105249989A (en) | Ultrasonic probe identification method based on unibus communication and ultrasonic medical equipment | |
| CN201076033Y (en) | Ultrasonic blind-guiding glove | |
| CN201876978U (en) | Eyesight protection warning device based on single chip | |
| CN204708880U (en) | Small intelligent ultrasonic depth finder | |
| CN201814797U (en) | Blind guidance device | |
| CN111025304A (en) | Novel fish finder capable of automatically switching wireless communication modes | |
| CN107589426A (en) | A kind of supersonic range finder | |
| CN204859179U (en) | Portable medical bluetooth module of multipurpose | |
| CN102847287B (en) | Basketball training device | |
| Zhi et al. | Design of distance measuring and reversing system | |
| CN203710686U (en) | Intelligent multifunctional educational toy car supporting various control modes | |
| CN211669364U (en) | Ultrasonic wave supervise device | |
| CN205539970U (en) | Fishing wrist -watch | |
| CN203422472U (en) | Portable intelligent distance meter provided with voice function | |
| CN201917616U (en) | Recorder for static electricity monitoring | |
| CN207923241U (en) | A kind of fish pond liquid level monitoring arrangement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110518 |