CN202195880U - Optoelectronic liquid crystal admeasuring apparatus - Google Patents
Optoelectronic liquid crystal admeasuring apparatus Download PDFInfo
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- CN202195880U CN202195880U CN201120322851XU CN201120322851U CN202195880U CN 202195880 U CN202195880 U CN 202195880U CN 201120322851X U CN201120322851X U CN 201120322851XU CN 201120322851 U CN201120322851 U CN 201120322851U CN 202195880 U CN202195880 U CN 202195880U
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- liquid crystal
- measuring instrument
- photoelectricity
- light source
- optoelectronic
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Abstract
An optoelectronic liquid crystal admeasuring apparatus comprises an optoelectronic liquid crystal admeasuring apparatus main machine and an optical dark cylinder. An optoelectronic integrated circuit, a replaceable light source and a light source support capable of axially adjusting distance are arranged in the optical dark cylinder, the optoelectronic liquid crystal admeasuring apparatus main machine internally comprises a signal sampling and processing circuit, a microprogrammed control unit (MCU) (microcontroller), a stable power supply and current and luminance output of liquid crystal display, and a sensor, a power supply output end of the light source and a signal input port of the sensor are arranged on a panel. Optoelectronic signals obtained from the optoelectronic sensor pass through the signal sampling and processing circuit and are input the MCU after analogue to digital conversion, and then display and output after being processed and driven by the MCU. The optoelectronic liquid crystal admeasuring apparatus can conduct illumination characteristic property and photoelectric characteristic measurement of visible light and near infrared light, and is applicable to teaching experiments and scientific research of correlated curriculum such as physics and automation in higher colleges and universities. The optoelectronic liquid crystal admeasuring apparatus is reasonable in structure, accurate in experiment measuring results, stable in data and in favor of application and popularization.
Description
Technical field
The utility model relates to a kind of photoelectricity liquid crystal measuring instrument that can be used for visible light, near infrared light measurement.Belong to sensor technology and experimental technique field.
Background technology
Photoelectric sensor is a kind of device that light signal is converted to electric signal; Can be used for detecting the non electrical quantity that directly causes by intensity variation; Like light intensity, illuminance etc.; Photoelectric sensor has characteristics such as noncontact, response are fast, dependable performance, and its physical basis is a photoelectric effect, and the application in the measurement and control system is very extensive in modern times.Photoelectricity liquid crystal measuring instrument is to utilize photoelectric sensor to obtain photosignal, through sampling and treatment circuit, photosignal is imported MCU (microcontroller) after mould/number conversion, after MCU handles and drives, shows output.
Photoelectricity liquid crystal measuring instrument is to carry out one of the course teaching of corresponding specialties such as physics, robotization and visual plant of scientific research towards teaching and scientific research units such as institution of higher learning, vocational technical school.
Development with teaching; The experimental teaching of colleges and universities not only requires experimental facilities that the experimental project of principle illustrative can be provided; The also requirement novelty experiment that can further quantize simultaneously; Cultivate the thinking and the manipulative ability of student's innovation, require experimental facilities will press close to the social production practice on the other hand, for practical personnel and engineering technical personnel cultivate in society; And the many experimental projects that the sensor characteristic of principle and illustrative can only be provided of existing sensors experiment still can not be done processing further to the measurement data that obtains.Also there is not to carry out simultaneously the experimental apparatus of light intensity, photoelectric characteristic measurement and the experimental study of visible light and nearly red place light.
Summary of the invention
The utility model is to the existing existing shortcoming of experimental apparatus; Propose a kind of wide spectral measurement ranges, can with the photosignal of photoelectric sensor through sampling and MCU handle, the photoelectricity liquid crystal measuring instrument of last liquid crystal display output, can satisfy the teaching requirements of teaching and scientific research unit photoelectricity experiments such as institution of higher learning.
The utility model is made up of photoelectricity liquid crystal measuring instrument main frame and the dark tube of optics; Be provided with integrated optoelectronic circuit and removable light source in the dark tube of optics and can axially adjust the light source bracket of distance; Have signal sampling and treatment circuit, MCU chip and driving circuit in the photoelectricity liquid crystal measuring instrument main frame, panel is provided with LCD liquid crystal display, three signal inputs of regulating button, sensor electrical source output terminal and photoelectric source output terminal and photoelectric sensor.From the photosignal that photoelectric sensor obtains, through sampling and treatment circuit, signal is imported MCU after mould/number conversion, after MCU calculates and handles, shows output again.
Integrated optoelectronic circuit in the dark tube of the optics of this photoelectricity liquid crystal measuring instrument adopts highly sensitive photoelectricity integrated chip OPT301, can carry out the illumination and the photoelectric characteristic of visible light and near infrared light and measure.It includes the device of a photodiode and an accurate FET input amplifier, its stable performance, and spectral range is wide; Thereby make that the output current of sensor and the illuminance of input light are linear relationships accurately; And the operating voltage range of this sensor is wide, and dark current is little, the power consumptive province.It has an incident light receive window, so that the photodiode in it receives the visible light and the near infrared light spectrum of incident, photodiode work has very low leakage current in zero-bias, the wavelength coverage of its photoresponse: 300nm～1100nm.
In photoelectricity liquid crystal measuring instrument main frame, adopted the MCU of MC9S08AW32 model to carry out Signal Processing and calculating; Adopted LM308 to carry out signal integration; Carry out the A/D analog to digital conversion of signal through MAX1107; SJA1000 carries out signal controlling and communication, and liquid crystal display output after HT1612 drives.
The MC9S08AW32 of the employing of the MCU of photoelectricity liquid crystal measuring instrument is a U.S. Freescale Semiconductor.It has 20MHz internal bus frequency; The FLASH storer of 32KB chip online programmable, 2KB chip Random Access Data storer (RAM) has internal clock generator simultaneously; Low pressure detects, high performance A/D converter, functions such as serial communication module.
Display driver adopts the multifunction drive HT1621 of 128 sections (32 * 4) internal memorys that are the release of Taiwan HOLTEK company, and it can drive multistage LCD character.HT1621 can constitute LCD display module and display system, only needs 3～4 with communicating by letter of microcontroller, and it is embedded in the oscillator of 256KHz, has suspend command, can reduce the power consumption of system effectively.
The dark tube of the optics of the utility model is the aluminum barrel of one section cylindrical sealing, and the left side is fixed with photoelectricity integrated chip OPT301 in the tube, in the dark tube removable light source is arranged, and can select common tungsten filament direct current electric light and high power red outer luminotron respectively for use.Light source is installed in one can be marked with accurate scale in Metallic rod along on the axially movable cylindrical metal bar of dark tube.The right ends of the dark tube of optics all through being threaded and carrying out airtightly, can be changed different light sources easily and carry out the maintenance in later stage after outwarding winding.
The photo-sensor signal will of the dark tube of optics one end connects lead through shielding photosignal is introduced the measuring instrument host circuit; The other end be the direct current electric light is housed can make the directed cylindrical metal bar that moves along dark tube central shaft; Indicate scale above; Can regulate and read the distance of light source and photoelectric sensor components, change the relative exposure between them.
The replaceable light source of this photoelectricity liquid crystal measuring instrument is to adopt the direct current electric light of no stroboscopic as the visible light illuminating source; Thereby obtain more stable light intensity; Adopt OD series Infrared High-Power luminotron as the infrared light illuminating source; Can be through more bringing the experiment of doing infrared light, during work illumination path put with dark tube in carry out, eliminated the influence of parasitic light to experiment.
The student can grasp the principle of work and the fundamental characteristics of photoelectric sensor through this photoelectricity liquid crystal measuring instrument, grasps the detection principle and the method for photoelectric sensor.But the light characteristics of the visible light of measuring light electric transducer and photoelectric characteristic curve.Also can accomplish simultaneously the light characteristics and the photoelectric characteristic curve of the infrared light of photoelectric sensor.Through the adjusting of distance between light source and photoelectric sensor, can accomplish the relation curve of light intensity and distance.
Description of drawings
Fig. 1 is a photoelectricity liquid crystal measuring instrument main frame, and wherein 1 is photoelectricity liquid crystal measuring instrument main frame, and 3 are three regulates button; The 4th, liquid crystal display, the 5th, power supply indication, the 6th, voltage-regulation knob; The 7th, sensor electrical source output terminal, the 8th, photoelectric source adjusting knob, the 9th, photoelectric source output terminal; The 10th, external delivery outlet, the 11st, the signal input of photoelectric sensor.
Fig. 2 is the dark tube of optics, and wherein 2 is the dark tubes of optics, the 12nd, and photoelectric sensor, the 13rd, light source, the 14th, firm banking, the 15th, cylindrical shaft is to rule, and the 16th, light source terminals, the 17th, photoelectric sensor supply terminals, the 18th, photo-sensor signal will output terminal.
Fig. 3 is the internal circuit diagram of OPT301
Fig. 4 is the signal output apparatus of photoelectric sensor
Fig. 5 is the liquid crystal display systems circuit
Embodiment
Photoelectric sensor supply terminals 17 joins through lead in the output 7 of the probe power of photoelectricity liquid crystal measuring instrument main frame 1 and the dark tube 2 of optics, and is controlled the required power supply of input photoelectric sensor by voltage-regulation knob 6.Light source terminals 16 in power output end 9 on the main frame 1 and the dark tube of optics join through lead, and are controlled the required power supply of input illuminating source by photoelectric source adjusting knob 8.The photo-sensor signal will of photo-sensor signal will output terminal 18 outputs in the dark tube of optics is input to the photo-sensor signal will input port 11 in the photoelectricity liquid crystal measuring instrument main frame 1 through shielded conductor.
The photoelectricity integrated chip of photoelectricity liquid crystal measuring instrument adopts OPT301, and MCU adopts MC9S08AW32, and integrating circuit adopts LM308; A/D converter adopts MAX1107, and 1 pin of OPT301 connects positive supply, and 3 pin connect negative supply; 8 pin ground connection are connected to filter capacitor C1 and C2 respectively between power supply and the ground, the 8 pin ground connection of OPT301; 4, be connected to a resistance R 1 between 5 pin, the photosignal of its 5 pin output is coupling-connected to input end 2 pin of integrating circuit amplifier LM308 through resistance R 2, is connected to filter capacitor C6, C3 between the power supply of LM308 and the ground respectively; Its 3 pin ground connection; 1, be connected to a capacitor C 4 between 8 pin, its output terminal 6 pin connect the 2 pin input ends of MAX1107, between the output terminal of LM308 and input end, are connected in parallel to integrating resistor R3, R4 and capacitor C 5.1, the 8 pin access+5V power supplys of MAX1107,3,4 pin ground connection.
The PTC0 of microcontroller MC9S08AW32～PTC2 port connects chip selection signal port (CS), " writing " signal controlling port (WR) and the data-signal port (DATA) of lcd drive chip HT1621 respectively, and connects respectively and draw resistance to high level (Vcc)." read " signal controlling port (RD) and receive high level (Vcc) through pull-up resistor.The PTE0 of MC9S08AW32～PTE7 port connects key-press module, and the PTC3 port connects NPN transistor, with the control backlight.The COM0 of lcd drive chip HT1621～COM3 port links to each other with COM1～COM4 port of LCD respectively; SEG0～SEG31 port links to each other with SEG1～SEG32 port of LCD respectively.When the display segment yardage of LCD is less than 128 (32 * 4), the remaining drive ports of HT1621 is put sky.
Microcontroller MC9S08AW32 is that PTC0～PTC2 links to each other with " DATA " with " CS ", " WR " of HT1621 respectively through three ports, realizes lcd drive chip " is write " control of order and data." CS " is the chip selection signal port of HT1621, and when " CS " was low level and conduct input, the data of " read/write " HT1621 were effective with order." read/write " data are carried out through " DATA " with " writing " order." WR " writes the input end of clock mouth, and when " WR " signal was rising edge, data address on the port " DATA " and order were written into HT1621 and go up corresponding RAM district.
Claims (6)
1. photoelectricity liquid crystal measuring instrument; It is characterized in that: form by photoelectricity liquid crystal measuring instrument main frame (1) and the dark tube of optics (2); Be provided with integrated optoelectronic circuit (12) and removable light source (13) in the dark tube of optics (2) and can axially adjust the light source bracket (15) of distance; Have signal sampling and treatment circuit, MCU chip and driving circuit in the photoelectricity liquid crystal measuring instrument main frame (1), panel is provided with LCD liquid crystal display (4), three signal inputs (11) of regulating button (3), sensor electrical source output terminal (7) and photoelectric source output terminal (9) and photoelectric sensor.
2. photoelectricity liquid crystal measuring instrument according to claim 1; It is characterized in that: the photoelectricity integrated chip that the integrated optoelectronic circuit in the dark tube of its optics (2) adopts is OPT301; The dark tube of optics (2) is the aluminum barrel of one section cylindrical sealing, and the left side is fixed with photoelectricity integrated chip OPT301 in the tube, in the dark tube removable light source is arranged; Light source is installed in one can be marked with accurate scale in Metallic rod along on the axially movable cylindrical metal bar of dark tube.
3. photoelectricity liquid crystal measuring instrument according to claim 1; It is characterized in that: in photoelectricity liquid crystal measuring instrument main frame (1), adopted the MCU of MC9S08AW32 model to carry out Signal Processing and calculating; Adopted LM308 to carry out signal integration; Carry out the A/D analog to digital conversion of signal through MAX1107, SJA1000 carries out signal controlling and communication, and drives the back liquid crystal display through HT1612 and export.
4. photoelectricity liquid crystal measuring instrument according to claim 1 is characterized in that: its removable light source is to adopt the direct current electric light of no stroboscopic as the visible light illuminating source, adopts OD series Infrared High-Power luminotron as the infrared light illuminating source
5. photoelectricity liquid crystal measuring instrument according to claim 1; It is characterized in that: the photoelectric sensor supply terminals (17) in the dark tube of the sensor electrical source output terminal (7) of photoelectricity liquid crystal measuring instrument main frame (1) and optics (2) joins through lead; And control by voltage-regulation knob (6); Light source terminals (16) in the dark tube of photoelectric source output terminal (9) on the main frame (1) and optics join through lead, and are controlled by photoelectric source adjusting knob (8).
6. photoelectricity liquid crystal measuring instrument according to claim 1 and 2 is characterized in that: the right ends of the dark tube of optics (2) is all through being threaded and carrying out airtight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120322851XU CN202195880U (en) | 2011-08-30 | 2011-08-30 | Optoelectronic liquid crystal admeasuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120322851XU CN202195880U (en) | 2011-08-30 | 2011-08-30 | Optoelectronic liquid crystal admeasuring apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN202195880U true CN202195880U (en) | 2012-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201120322851XU Expired - Fee Related CN202195880U (en) | 2011-08-30 | 2011-08-30 | Optoelectronic liquid crystal admeasuring apparatus |
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| CN (1) | CN202195880U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393881A (en) * | 2014-12-08 | 2015-03-04 | 成都中远信电子科技有限公司 | Portable high-efficiency signal acqusition and processing board device |
| CN107560649A (en) * | 2017-08-25 | 2018-01-09 | 佛山赛威光电技术有限公司 | A kind of photoelectric effect tester |
-
2011
- 2011-08-30 CN CN201120322851XU patent/CN202195880U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393881A (en) * | 2014-12-08 | 2015-03-04 | 成都中远信电子科技有限公司 | Portable high-efficiency signal acqusition and processing board device |
| CN107560649A (en) * | 2017-08-25 | 2018-01-09 | 佛山赛威光电技术有限公司 | A kind of photoelectric effect tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120418 Termination date: 20140830 |
|
| EXPY | Termination of patent right or utility model |