CN204440091U - A kind of for the voltage regulating device in Millikan oil-drop experiment instrument - Google Patents
A kind of for the voltage regulating device in Millikan oil-drop experiment instrument Download PDFInfo
- Publication number
- CN204440091U CN204440091U CN201520155101.6U CN201520155101U CN204440091U CN 204440091 U CN204440091 U CN 204440091U CN 201520155101 U CN201520155101 U CN 201520155101U CN 204440091 U CN204440091 U CN 204440091U
- Authority
- CN
- China
- Prior art keywords
- port
- circuit
- chip microcomputer
- chip
- analog
- 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.)
- Expired - Fee Related
Links
- 238000002474 experimental method Methods 0.000 title claims abstract description 25
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000003750 conditioning effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Analogue/Digital Conversion (AREA)
Abstract
The utility model discloses a kind of for the voltage regulating device in Millikan oil-drop experiment instrument, comprise photoelectric coding circuit, touch control input circuit, liquid crystal display circuit, D/A converting circuit, analog to digital conversion circuit and voltage regulator circuit; Described touch control input circuit is all connected with the signal input part of single-chip microcomputer with the output terminal of photoelectric coding circuit, the signal output part of described single-chip microcomputer is connected with the input end of liquid crystal display circuit and the input end of D/A converting circuit respectively, the output terminal of described D/A converting circuit is connected with the input end of voltage regulator circuit, described voltage regulator circuit is connected with single-chip microcomputer by analog to digital conversion circuit, and described voltage regulator circuit regulates required conditioning equipment.The utility model adopts photoelectric encoder to replace potentiometer, realizes mechanical wearing and tearing, extend instrument serviceable life in regulation voltage process.
Description
Technical field
The utility model relates to a kind of for the voltage regulating device in Millikan oil-drop experiment instrument, belongs to teaching test apparatus field.
Background technology
Millikon oil drop experiment is the content generally adopted in college physical experiment teaching, and the base potential that the DC voltage control part overwhelming majority between two metal polar plates of the Millikan oil-drop experiment instrument that this experiment at present uses adopts potentiometer to change Correctional tube has been come.In use, contact point and resistive element produce mechanical friction to potentiometer, and resistive element surface is easily worn, consequently the degree of regulation of potentiometer regulation voltage, regulate sensitivity etc. all can have a greatly reduced quality.On the other hand, in instrument use procedure, along with the increase of each function button number of times, control knob often there will be contact to be damaged, loose contact, the situation such as mechanical wear, button malfunction.The appearance of these situations, instrument polar plate voltage can be caused unstable, and change is uneven, and produces time delay in the control of oil droplet motion state, situation about even not responding time serious.It is even malfunctioning that these mechanical wears all can cause Mass Control to decline, and causes instrument cisco unity malfunction.
Utility model content
In order to solve the problems of the technologies described above, the utility model provides a kind of for the voltage regulating device in Millikan oil-drop experiment instrument.
In order to achieve the above object, the technical scheme that the utility model adopts is:
For the voltage regulating device in Millikan oil-drop experiment instrument, comprise photoelectric coding circuit, touch control input circuit, liquid crystal display circuit, D/A converting circuit, analog to digital conversion circuit and voltage regulator circuit, described touch control input circuit is all connected with the signal input part of single-chip microcomputer with the output terminal of photoelectric coding circuit, the signal output part of described single-chip microcomputer is connected with the input end of liquid crystal display circuit and the input end of D/A converting circuit respectively, the output terminal of described D/A converting circuit is connected with the input end of voltage regulator circuit, described voltage regulator circuit is connected with single-chip microcomputer by analog to digital conversion circuit, and described voltage regulator circuit regulates Millikan oil-drop experiment instrument, described photoelectric coding circuit comprises photoelectric encoder U4, pull-up resistor R6 and pull-up resistor R7, the A road output terminal of described photoelectric encoder U4 is connected with single-chip microcomputer P32 port, the B road output terminal of described photoelectric encoder U4 is connected with single-chip microcomputer P33 port, described pull-up resistor R6 is arranged on single-chip microcomputer P32 port, and described pull-up resistor R7 is arranged on single-chip microcomputer P33 port, described touch control input circuit comprises touch-screen, and the LCD-TOUCH end of described touch-screen is connected with single-chip microcomputer by serial ports, described D/A converting circuit comprises analog-digital chip U2, the DIN port of described analog-digital chip U2 is connected with the P21 port of single-chip microcomputer, SCLK port is connected with the P22 port of single-chip microcomputer, and CS port is connected with the P23 port of single-chip microcomputer, and FS port is connected with the P24 port of single-chip microcomputer, described voltage regulator circuit comprises triode Q2, amplifier U3, resistance R13, resistance R15, supply hub U43 and supply hub U44, the collector of described triode Q2 connects high direct voltage, base stage is connected with the OUT port of analog-digital chip U2, emitter is connected with the AGND port of analog-digital chip U2 and supply hub U43 respectively, the emitter of described triode Q2 is also connected with supply hub U44 with resistance R14 by resistance R13 successively, described supply hub U43 and supply hub U44 are connected with the two-plate of Millikan oil-drop experiment instrument oil droplet box respectively, described amplifier U3 is connected between resistance R13 and resistance R14, analog-digital conversion circuit as described comprises modulus conversion chip U1 and filter capacitor C41, the CS port of described modulus conversion chip U1 is connected with the P27 port of single-chip microcomputer, DOUT port is connected with the P26 port of single-chip microcomputer, DCLOCK port is connected with the P25 port of single-chip microcomputer, + IN port is connected with the VOUT1 port of amplifier U3, and described filter capacitor C41 is arranged between+IN port and-IN port.
Described liquid crystal display circuit comprises chip of LCD, the input end of described chip of LCD is connected with the P31 port of single-chip microcomputer, the output terminal of described chip of LCD is connected with the P30 port of single-chip microcomputer, and the busy end of reading of described chip of LCD is connected with busy end of reading of single-chip microcomputer.
Described touch-screen is M100 touch-screen.
Described analog-digital chip U2 is TLV5616 chip.
Described modulus conversion chip U1 is ADS7816 chip.
Described single-chip microcomputer is also connected with crystal oscillating circuit, video display, self-inspection warning circuit, reset circuit and watchdog module.
Described single-chip microcomputer is AT89C51.
The beneficial effect that the utility model reaches: 1, the utility model adopts photoelectric encoder to replace potentiometer, realizes mechanical wearing and tearing, extends instrument serviceable life in regulation voltage process; 2, use touch-screen to substitute control knob, not only increase Mass Control, and greatly reduce device spoilage; 3, adopt D/A converting circuit, analog to digital conversion circuit, coordinate voltage regulator circuit to realize voltage-regulation, there is higher control accuracy.
Accompanying drawing explanation
Fig. 1 is the utility model structured flowchart.
Fig. 2 is the circuit connection diagram of single-chip microcomputer.
Fig. 3 is photoelectric coding circuit diagram.
Fig. 4 is liquid crystal display circuit schematic diagram.
Fig. 5 is D/A converting circuit schematic diagram.
Fig. 6 is voltage regulator circuit schematic diagram.
Fig. 7 is analog to digital conversion circuit schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.Following examples only for clearly the technical solution of the utility model being described, and can not limit protection domain of the present utility model with this.
As shown in Figure 1, a kind of for the voltage regulating device in Millikan oil-drop experiment instrument, comprise photoelectric coding circuit, touch control input circuit, liquid crystal display circuit, D/A converting circuit, analog to digital conversion circuit and voltage regulator circuit.
Touch control input circuit is all connected with the signal input part of single-chip microcomputer with the output terminal of photoelectric coding circuit, the signal output part of single-chip microcomputer is connected with the input end of liquid crystal display circuit and the input end of D/A converting circuit respectively, the output terminal of D/A converting circuit is connected with the input end of voltage regulator circuit, voltage regulator circuit is connected with single-chip microcomputer by analog to digital conversion circuit, and voltage regulator circuit regulates Millikan oil-drop experiment instrument.
As shown in Figure 2, above-mentioned single-chip microcomputer is AT89C51, as shown in Figure 3, above-mentioned photoelectric coding circuit is in order to provide digital pulse signal to single-chip microcomputer, comprise photoelectric encoder U4, pull-up resistor R6 and pull-up resistor R7, the A road output terminal of photoelectric encoder U4 is connected with single-chip microcomputer P32 port, and the B road output terminal of photoelectric encoder U4 is connected with single-chip microcomputer P33 port, pull-up resistor R6 is arranged on single-chip microcomputer P32 port, and pull-up resistor R7 is arranged on single-chip microcomputer P33 port.
Above-mentioned touch control input circuit is used for providing the digital signal after touch to single-chip microcomputer, and comprise touch-screen, touch-screen is M100 touch-screen, and the LCD-TOUCH end of touch-screen is connected with single-chip microcomputer by serial ports.
As shown in Figure 4, above-mentioned liquid crystal display circuit is in order to show the control inerface of touch-screen, comprise chip of LCD, the input end of chip of LCD is connected with the P31 port of single-chip microcomputer, the output terminal of chip of LCD is connected with the P30 port of single-chip microcomputer, and the busy end of reading of chip of LCD is connected with busy end of reading of single-chip microcomputer.
As shown in Figure 5, the signal transacting that above-mentioned D/A converting circuit is used for single-chip microcomputer exports becomes continuous print simulating signal, comprise analog-digital chip U2, here analog-digital chip U2 is TLV5616 chip, the DIN port of analog-digital chip U2 is connected with the P21 port of single-chip microcomputer, SCLK port is connected with the P22 port of single-chip microcomputer, and CS port is connected with the P23 port of single-chip microcomputer, and FS port is connected with the P24 port of single-chip microcomputer.
As shown in Figure 6, above-mentioned voltage regulator circuit comprises triode Q2, amplifier U3, resistance R13, resistance R15, supply hub U43 and supply hub U44, the collector of triode Q2 connects high direct voltage, base stage is connected with the OUT port of analog-digital chip U2, emitter is connected with the AGND port of analog-digital chip U2 and supply hub U43 respectively, the emitter of triode Q2 is also connected with supply hub U44 with resistance R14 by resistance R13 successively, supply hub U43 and supply hub U44 are connected with the two-plate of Millikan oil-drop experiment instrument oil droplet box respectively, amplifier U3 is connected between resistance R13 and resistance R14.
As shown in Figure 7, above-mentioned analog to digital conversion circuit is used for converting the voltage signal that voltage regulator circuit exports to digital signal and is supplied to single-chip microcomputer and processes, comprise modulus conversion chip U1 and filter capacitor C41, modulus conversion chip U1 is ADS7816 chip, the CS port of modulus conversion chip U1 is connected with the P27 port of single-chip microcomputer, DOUT port is connected with the P26 port of single-chip microcomputer, DCLOCK port is connected with the P25 port of single-chip microcomputer, + IN port is connected with the VOUT1 port of amplifier U3, and filter capacitor C41 is arranged between+IN port and-IN port.
Above-mentioned single-chip microcomputer is connected with crystal oscillating circuit, video display, self-inspection warning circuit, reset circuit and watchdog module.
Said apparatus is as follows in the principle of work of the oil droplet balanced voltage regulating Millikan oil-drop experiment instrument: after spraying into oil droplet to oil droplet box, need to regulate oil droplet balanced voltage, rotary photoelectric encoder, photoelectric encoder can send digital pulse signal, the digital pulse signal received with processing, is differentiated that it rotates forward or reversion by single-chip microcomputer.If rotate forward, i.e. booster tension; If reversion, namely reduces voltage.Touch-screen input circuit is coordinated to control the motion state of the balance of oil droplet between pole plate, rising, decline as required, single-chip microcomputer D/A converting circuit converts digital pulse signal to simulating signal simultaneously, and by voltage regulator circuit, control voltage being added on two metal polar plates, the voltage after adjustment will become digital quantity through analog to digital conversion circuit and it be shown on a video display through single-chip microcomputer.
In sum, the utility model adopts photoelectric encoder to replace potentiometer, realizes mechanical wearing and tearing, extend instrument serviceable life in regulation voltage process; Use touch-screen to substitute control knob, not only increase Mass Control, and greatly reduce device spoilage; Adopt D/A converting circuit, analog to digital conversion circuit, coordinate voltage regulator circuit to realize voltage-regulation, there is higher control accuracy.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and distortion, these improve and distortion also should be considered as protection domain of the present utility model.
Claims (7)
1. for the voltage regulating device in Millikan oil-drop experiment instrument, it is characterized in that: comprise photoelectric coding circuit, touch control input circuit, liquid crystal display circuit, D/A converting circuit, analog to digital conversion circuit and voltage regulator circuit; Described touch control input circuit is all connected with the signal input part of single-chip microcomputer with the output terminal of photoelectric coding circuit, the signal output part of described single-chip microcomputer is connected with the input end of liquid crystal display circuit and the input end of D/A converting circuit respectively, the output terminal of described D/A converting circuit is connected with the input end of voltage regulator circuit, described voltage regulator circuit is connected with single-chip microcomputer by analog to digital conversion circuit, and described voltage regulator circuit regulates Millikan oil-drop experiment instrument;
Described photoelectric coding circuit comprises photoelectric encoder U4, pull-up resistor R6 and pull-up resistor R7, the A road output terminal of described photoelectric encoder U4 is connected with single-chip microcomputer P32 port, the B road output terminal of described photoelectric encoder U4 is connected with single-chip microcomputer P33 port, described pull-up resistor R6 is arranged on single-chip microcomputer P32 port, and described pull-up resistor R7 is arranged on single-chip microcomputer P33 port;
Described touch control input circuit comprises touch-screen, and the LCD-TOUCH end of described touch-screen is connected with single-chip microcomputer by serial ports;
Described D/A converting circuit comprises analog-digital chip U2, the DIN port of described analog-digital chip U2 is connected with the P21 port of single-chip microcomputer, SCLK port is connected with the P22 port of single-chip microcomputer, and CS port is connected with the P23 port of single-chip microcomputer, and FS port is connected with the P24 port of single-chip microcomputer;
Described voltage regulator circuit comprises triode Q2, amplifier U3, resistance R13, resistance R15, supply hub U43 and supply hub U44, the collector of described triode Q2 connects high direct voltage, base stage is connected with the OUT port of analog-digital chip U2, emitter is connected with the AGND port of analog-digital chip U2 and supply hub U43 respectively, the emitter of described triode Q2 is also connected with supply hub U44 with resistance R14 by resistance R13 successively, described supply hub U43 and supply hub U44 are connected with the two-plate of Millikan oil-drop experiment instrument oil droplet box respectively, described amplifier U3 is connected between resistance R13 and resistance R14,
Analog-digital conversion circuit as described comprises modulus conversion chip U1 and filter capacitor C41, the CS port of described modulus conversion chip U1 is connected with the P27 port of single-chip microcomputer, DOUT port is connected with the P26 port of single-chip microcomputer, DCLOCK port is connected with the P25 port of single-chip microcomputer, + IN port is connected with the VOUT1 port of amplifier U3, and described filter capacitor C41 is arranged between+IN port and-IN port.
2. according to claim 1 a kind of for the voltage regulating device in Millikan oil-drop experiment instrument, it is characterized in that: described liquid crystal display circuit comprises chip of LCD, the input end of described chip of LCD is connected with the P31 port of single-chip microcomputer, the output terminal of described chip of LCD is connected with the P30 port of single-chip microcomputer, and the busy end of reading of described chip of LCD is connected with busy end of reading of single-chip microcomputer.
3. according to claim 1 a kind of for the voltage regulating device in Millikan oil-drop experiment instrument, it is characterized in that: described touch-screen is M100 touch-screen.
4. according to claim 1 a kind of for the voltage regulating device in Millikan oil-drop experiment instrument, it is characterized in that: described analog-digital chip U2 is TLV5616 chip.
5. according to claim 1 a kind of for the voltage regulating device in Millikan oil-drop experiment instrument, it is characterized in that: described modulus conversion chip U1 is ADS7816 chip.
6. according to claim 1 a kind of for the voltage regulating device in Millikan oil-drop experiment instrument, it is characterized in that: described single-chip microcomputer is also connected with crystal oscillating circuit, video display, self-inspection warning circuit, reset circuit and watchdog module.
7. according to claim 6 a kind of for the voltage regulating device in Millikan oil-drop experiment instrument, it is characterized in that: described single-chip microcomputer is AT89C51.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520155101.6U CN204440091U (en) | 2015-03-18 | 2015-03-18 | A kind of for the voltage regulating device in Millikan oil-drop experiment instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520155101.6U CN204440091U (en) | 2015-03-18 | 2015-03-18 | A kind of for the voltage regulating device in Millikan oil-drop experiment instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204440091U true CN204440091U (en) | 2015-07-01 |
Family
ID=53607935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520155101.6U Expired - Fee Related CN204440091U (en) | 2015-03-18 | 2015-03-18 | A kind of for the voltage regulating device in Millikan oil-drop experiment instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204440091U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510189A (en) * | 2015-12-08 | 2016-04-20 | 四川大学 | Device and method for reducing air pressure measurement Millikan oil-drop balanced voltage |
| CN105681661A (en) * | 2016-02-01 | 2016-06-15 | 南京航空航天大学 | Adjusting device, adjusting system and adjusting method for Millikan oil-drop experiment instrument |
| CN106652699A (en) * | 2017-02-21 | 2017-05-10 | 华南理工大学 | Millikan oil drop experiment instrument capable of generating tiny charged oil drops by utilizing compressed air flow and experiment method |
| CN107505873A (en) * | 2017-08-31 | 2017-12-22 | 西安永固铁路器材有限公司 | A kind of intelligent material allocation cabinet and delivery system shown with quantity |
-
2015
- 2015-03-18 CN CN201520155101.6U patent/CN204440091U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510189A (en) * | 2015-12-08 | 2016-04-20 | 四川大学 | Device and method for reducing air pressure measurement Millikan oil-drop balanced voltage |
| CN105510189B (en) * | 2015-12-08 | 2018-01-05 | 四川大学 | Reduce the device and method of barometric surveying Millikan oil drop balanced voltage |
| CN105681661A (en) * | 2016-02-01 | 2016-06-15 | 南京航空航天大学 | Adjusting device, adjusting system and adjusting method for Millikan oil-drop experiment instrument |
| CN105681661B (en) * | 2016-02-01 | 2017-11-07 | 南京航空航天大学 | A kind of adjusting means, regulating system and the adjusting method of Millikan oil-drop experiment instrument |
| CN106652699A (en) * | 2017-02-21 | 2017-05-10 | 华南理工大学 | Millikan oil drop experiment instrument capable of generating tiny charged oil drops by utilizing compressed air flow and experiment method |
| CN107505873A (en) * | 2017-08-31 | 2017-12-22 | 西安永固铁路器材有限公司 | A kind of intelligent material allocation cabinet and delivery system shown with quantity |
| CN107505873B (en) * | 2017-08-31 | 2024-05-14 | 西安永固智能装备有限公司 | Intelligent material distribution cabinet with quantity display and distribution system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204440091U (en) | A kind of for the voltage regulating device in Millikan oil-drop experiment instrument | |
| CN203786187U (en) | Online generator carbon brush comprehensive current-monitoring apparatus | |
| CN204675422U (en) | A kind of material thin tobacco-making machine with Anti-blockage control setup | |
| CN207649802U (en) | Elastomer strain film resistance | |
| CN203848868U (en) | Defective product detecting and controlling device for pressing machine | |
| CN204349936U (en) | A kind of filter circuit | |
| Rajnak | Volcano: Enabling correctness by design | |
| CN207241245U (en) | A kind of blackboard for electronic information engineering discipline teaching | |
| CN204188204U (en) | Based on the Urban Data harvester of double copies | |
| CN207559974U (en) | A kind of analog level adjusts circuit | |
| CN203950229U (en) | DC high voltage increasing apparatus based on photoelectric control | |
| CN208612938U (en) | A kind of coating end is for plastic pipe control pressurer system | |
| CN106843486B (en) | Virtual reality gesture control method | |
| CN202453507U (en) | Signal processing circuit of gamma-ray counter tube | |
| CN202818133U (en) | Circuit of dual-supply apparatus | |
| CN207816228U (en) | Breaker displacement sensor mounting bracket | |
| CN202486917U (en) | Alarm circuit synchronous with power failure | |
| CN207096325U (en) | A kind of A/D convertor circuit of intelligent electric meter | |
| CN205014019U (en) | Bumper that uses in chemical industry | |
| CN206039330U (en) | High accuracy temperature -control circuit | |
| CN204933892U (en) | A kind of glue quantity regulating device for coating complex machine | |
| CN203433404U (en) | Joystick | |
| CN205540344U (en) | Electronic control temperature control system | |
| CN201714704U (en) | Wind speed adjusting device for ion blower fan | |
| CN205176680U (en) | Little motor system temperature control device |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150701 Termination date: 20160318 |