CN206711473U - A kind of intelligent Newton's ring measuring instrument - Google Patents
A kind of intelligent Newton's ring measuring instrument Download PDFInfo
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- CN206711473U CN206711473U CN201720383508.3U CN201720383508U CN206711473U CN 206711473 U CN206711473 U CN 206711473U CN 201720383508 U CN201720383508 U CN 201720383508U CN 206711473 U CN206711473 U CN 206711473U
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- circuit
- newton
- display
- time delay
- power supply
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Abstract
The utility model discloses a kind of intelligent Newton's ring measuring instrument, including sync separator circuit, gate circuit, measurement line generation circuit, single-chip microcomputer, the first display and second display；The isolated horizontal synchronizing pulse signal of the synchronized demultiplexing circuit of vision signal for the Newton's ring that CCD camera photographs；Gate circuit includes two monostable time delay circuits；The output end of sync separator circuit connects the triggering end of two monostable time delay circuits；The output end of two monostable time delay circuits connects two external interrupt pin interfaces of single-chip microcomputer, the opening and closing for timer in control single chip computer respectively；The count value of single-chip microcomputer timer is sent on second display and shown.The output end of two monostable time delay circuits is also respectively connected to measure line generation circuit, and measurement line generation circuit produces measurement line and shown on the first display.The utility model can measure to Newton's ring image, and small volume, and simple in construction, power consumption is low.
Description
Technical field
College physics teaching instrument is the utility model is related to, specially a kind of intelligent Newton's ring measuring instrument.
Background technology
Current most of university has all opened up Newton's ring and wedge isopachous interferential experiment, and experiment content generally includes " to use ox
The radius of curvature of around-France measurement lens " and " thickness that thin slice is measured with wedge fringes method " two parts, experimental method are mostly
Directly Newton's ring or wedge isopachous interferential are carried out with reading microscope observation or the measurement apparatus more much bigger than reading microscope
Striped is tested, this method clear physics conception.But there is problems with old-fashioned Newton's ring measuring instrument：
1st, volume is big and heavy, takes whole experimental bench, is unfavorable for student and tests；
2nd, maintenance is inconvenient, and power consumption is big, and cost is high；
3rd, not intelligent, without data processing function, reading is not directly perceived, does not meet modern teaching requirement；
4th, it is not readily portable.
A kind of existing patent document " photoelectric isopath interference experimental instrument " (application number：CN03248152.7 one) is disclosed
Kind can be observed interference fringe image on monitor screen, electricity consumption measuring method measures to interference fringe spacing
Experiment instrument.It has the following disadvantages：(1) this scheme main frame is using counter, frequency divider, decoder, 7 segment numeral pipes, transformation
Tens pieces of device, 78XX series voltage-stabilized power supply IC chips, along with some aid in gate circuits and fin and fan,
This generates equipment instrument is huge, power consumption increases, be inconvenient to change circuit the drawbacks of.(2) display of this scheme is big using CRT
Head display, it is bulky, and need outer row field sync signal to stablize picture signal；Power consumption is big (a few hectowatts), there is X ray
Radiation, unfavorable to health, influence is tested；(3) wiring of this scheme for main frame and auxiliary equipment is numerous, and for connecing
Line has special requirement, does not meet easy principle.
Existing patent document " can Synchronous transmission and the experimental provision of reflective Newton ring " (publication number：
CN201974994) disclose it is a kind of can Synchronous transmission and the experimental provision of reflective Newton ring, but without the figure to interference ring
As the function of measuring.
A kind of existing patent document " Newton's ring digitlization amplifying display system " (publication number：CN102681160) disclose
A kind of Newton's ring digitlization amplifying display system, but the function of being measured in system without the image to interference ring.
Therefore, it is necessary to design a kind of Newton's ring measuring instrument that can overcome drawbacks described above.
Utility model content
The technical problem that the utility model solves is, in view of the shortcomings of the prior art, there is provided a kind of intelligent Newton's Ring
Instrument is measured, Newton's ring image can be measured, and small volume, simple in construction, power consumption is low.
Technical scheme provided by the utility model is：
A kind of intelligent Newton's ring measuring instrument, including sync separator circuit, gate circuit, measurement line generation circuit, list
Piece machine, the first display and second display；
The function of the sync separator circuit is that the line synchronising signal of vision signal is isolated from vision signal
Come, the vision signal of Newton's ring, output caused by the Newton's ring striped generation device that its input access CCD camera photographs
Hold the horizontal synchronizing pulse signal separated；
The gate circuit includes two monostable time delay circuits；
The output end of sync separator circuit connects the triggering end of two monostable time delay circuits；Two monostable time delay
The RC time constants of circuit are different, and the pulse width of output signal is different；
The output end of two monostable time delay circuits connects two external interrupt pin interfaces of single-chip microcomputer respectively, for controlling
The opening and closing of timer in single-chip microcomputer processed；The output end connection second display of single-chip microcomputer, it is fixed in single-chip microcomputer for showing
When device counting；
The output end of two monostable time delay circuits is also respectively connected to measure line generation circuit, measures the defeated of line generation circuit
Go out end and be connected to the first display.
The measurement line generation circuit includes resistance R17, R18, R19, R20, R21, R22, R23, R24, R25, R26, electricity
Hold C16, C17, electrochemical capacitor C23, C24, diode D6, D7 and PNP type triode Q3 and Q4；
The output end of first monostable time delay circuit is successively through electric capacity C16, diode D7 negative pole, positive pole and resistance R19
Connect triode Q4 base stage；The output end of second monostable time delay circuit is successively through electric capacity C17, diode D6 negative pole, positive pole
Triode Q3 base stage is connect with resistance R20；Power supply VCC connects diode D7 and D6 negative pole through resistance R17 and R18 respectively；
Q3 base stage meets power supply VCC through resistance R21, through resistance R22 with connecing power supply；Q3 emitter stage meets power supply VCC, Q3's
Colelctor electrode is connected to the first display by electrochemical capacitor C23, and through resistance R23 with connecing power supply.
Q4 base stage meets power supply VCC through resistance R24, through resistance R25 with connecing power supply；Q4 emitter stage meets power supply VCC, Q4
Colelctor electrode the first display is connected to by electrochemical capacitor C24, and through resistance R26 with connecing power supply.
Described two monostable time delay circuits are using the NE556 chips for being internally integrated two NE555 time base circuits；First
The discharge end of NE555 time base circuits is connected with threshold value end, and connects power supply VCC with resistance R15 through potentiometer W1；2nd NE555
The discharge end of time base circuit is connected with threshold value end, and connects power supply VCC with resistance R16 through potentiometer W2.By adjusting potentiometer
W1 and potentiometer W2 cans adjust the output pulse duty factor of two monostable time delay circuits.
The single-chip microcomputer through CH340 interfaces (CH340 is the switching chip of a usb bus, realize USB turn serial ports or
USB turns LPT) communicated with host computer.CH340 interfaces realize single-chip microcomputer and host computer communication, and measurement data result is transferred to
On host computer, the preservation and teacher that facilitate experimental data are commented on.
Described intelligent Newton's ring measuring instrument, in addition to self-checking circuit；The output end of self-checking circuit normally opened is opened by one
Connection connects sync separator circuit；The output end of CCD camera connects sync separator circuit by a normally closed switch
Input.
The self-checking circuit is the adjustable multivibrator of dutycycle being made up of NE555 time base circuits, and its output end is produced
The adjustable pulse of raw dutycycle.
During debugging, disconnect CCD camera separated with synchronizing signal between switch, closure self-checking circuit and synchronizing signal point
From the switch between circuit, self-checking circuit and sync separator circuit are connected, it is same that self-checking circuit produces pulse signal input
Walk demultiplexing circuit, with carry out instrument testing and detection subsequent synchronisation demultiplexing circuit whether normal work.
Described intelligent Newton's ring measuring instrument, in addition to the temperature sensor being connected with single-chip microcomputer【DS18B20】, for surveying
Measure and show experimental temperature environment.
Described intelligent Newton's ring measuring instrument, in addition to power module, its output+12V and+5V dc sources, for for
Circuit is powered.
The single-chip microcomputer uses STC89C52 single chip, and first display uses conformable display, and described second is aobvious
Show that device uses 1602 liquid crystal displays.
The utility model principle is：
According to horizontal synchronizing pulse signal is included in vision signal, horizontal synchronizing pulse signal is isolated from vision signal
Come, with the synchronizing signal (trailing edge) while trigger two monostable time delay circuits so that two monostable time delay circuits produce
The monostable pulses of different in width, knife switch is produced using the difference of the delay of two monostable time delay circuits.The width of gate
Narrow to determine the number of pulse, the number of pulse is to the material object of the first display display measurement apart from directly proportional.Specific implementation side
Method is：The output pulse signal of two monostable time delay circuits is respectively fed to the INT0 mouths (external interrupt 0) of single-chip microcomputer, monolithic
The INT1 mouths (external interrupt 1) of machine；Single-chip microcomputer INT0 mouths and INT1 mouths are each responsible for the defeated of two monostable time delay circuits of sampling
Go out pulse falling edge, i.e. gate commencing signal and gate end signal, wherein gate commencing signal causes the timer of single-chip microcomputer
Counting starts, and gate end signal causes the timer count of single-chip microcomputer to stop.Gate commencing signal produces through C16 and R17 simultaneously
The base stage given birth to sharp negative pulse and triode Q4 is sent to by D7 and R19 produces positive spike output signal by anti-phase, then passes through
C24 produces sharp negative pulse through C17 and R18 and is sent to triode Q3's by D6 and R20 to the first display, gate end signal
Base stage produces positive spike output signal by anti-phase, then by C23 to the first display, i.e., two is produced on the first display
The longitudinal direction measurement line of white.Width between measurement line can be adjusted by adjusting potentiometer W1 and potentiometer W2.In experiment
W1 and W2 can be adjusted so that measurement line moves on to the position for wanting measurement.Because two on the first display measure the distance of lines,
The startup of corresponding single-chip microcomputer timer and shut-in time, so the distance of two measurement lines and single-chip microcomputer are determined on the first indicator screen
When device count number it is proportional.The count value of certain distance in measured counting and cursor is relatively drawn measurement line
Between actual distance.Assuming that when cursor distance is L, single-chip microcomputer is counted as N；Measure certain image point-to-point transmission apart from when, single-chip microcomputer
N is counted as, then actual measurement distance D=nL/N.Temperature sensor is used to measuring and showing that the actual measurement distance is at which kind of
At a temperature of measure.
Beneficial effect：
The utility model uses the first display of common arbitrary size size, the single row field that image need not be outside
Synchronizing signal, image stabilization, and the first display quantity can be increased and decreased on a main frame.
For the utility model using STC89C52 single chip as core, circuit structure is simple, in light weight, small power consumption, without examining
Consider radiating.Complete machine only has mobile phone size, embodies intelligent, the characteristics of meeting modern equipment.
Brief description of the drawings
Fig. 1 is the schematic diagram that the utility model obtains signal strobe；
Fig. 2 is Tthe utility model system structure chart；
Fig. 3 is the utility model circuit total figure；
Fig. 4 is oscillogram of the vision signal by sync separator circuit；
Fig. 5 is a kind of way of realization of sync separator circuit；
Fig. 6 is signal strobe
Fig. 7 is that signal strobe produces schematic diagram；
Fig. 8 is the generation schematic diagram of measurement line.
Embodiment
The utility model is described in more detail below in conjunction with the drawings and specific embodiments.
As shown in Fig. 2 the utility model provides a kind of intelligent Newton's ring measuring instrument, including sync separator circuit,
Gate circuit, measurement line generation circuit, the first display, single-chip microcomputer and second display；
The function of the sync separator circuit is that the line synchronising signal of vision signal is isolated from vision signal
Come, the vision signal for the Newton's ring that its input access CCD camera photographs, the horizontal synchronizing pulse letter that output end is separated
Number；As shown in figure 4, when the line frequency of vision signal is 15625, vision signal (full video signal, is synchronously believed comprising row with field synchronization
Number) pass through the oscillogram of sync separator circuit.Sync separator circuit has more as a kind of tandem circuit, way of realization
Kind, as integrated chip is realized.Fig. 5 is a kind of way of realization of sync separator circuit, and vision signal inputs from IN ends, from
The line synchronising signal pulse that OUT terminal can be separated.
As shown in fig. 7, the gate circuit includes two monostable time delay circuits；
The output end of sync separator circuit connects the triggering end of two monostable time delay circuits；Two monostable time delay
The RC time constants of circuit are different, and the pulse width of output signal is different；
The output end of two monostable time delay circuits connects two external interrupt pin interfaces of single-chip microcomputer, i.e. INT0 respectively
And INT1, the opening and closing for timer in control single chip computer；
The output end of two monostable time delay circuits is also respectively connected to measure line generation circuit, measures the defeated of line generation circuit
Go out end and be connected to the first display.
As shown in figure 8, the measurement line generation circuit include resistance R17, R18, R19, R20, R21, R22, R23, R24,
R25, R26, electric capacity C16, C17, electrochemical capacitor C23, C24, diode D6, D7 and PNP type triode Q3 and Q4；
The output end of first monostable time delay circuit is successively through electric capacity C16, diode D7 negative pole, positive pole and resistance R19
Connect triode Q4 base stage；The output end of second monostable time delay circuit is successively through electric capacity C17, diode D6 negative pole, positive pole
Triode Q3 base stage is connect with resistance R20；Power supply VCC connects diode D7 and D6 negative pole through resistance R17 and R18 respectively；
Q3 base stage meets power supply VCC through resistance R21, through resistance R22 with connecing power supply；Q3 emitter stage meets power supply VCC, Q3's
Colelctor electrode is connected to the first display by electrochemical capacitor C23, and through resistance R23 with connecing power supply.
Q4 base stage meets power supply VCC through resistance R24, through resistance R25 with connecing power supply；Q4 emitter stage meets power supply VCC, Q4
Colelctor electrode the first display is connected to by electrochemical capacitor C24, and through resistance R26 with connecing power supply.
Described two monostable time delay circuits are using the NE556 chips for being internally integrated two NE555 time base circuits；First
The discharge end of NE555 time base circuits is connected with threshold value end, and connects power supply VCC with resistance R15 through potentiometer W1；2nd NE555
The discharge end of time base circuit is connected with threshold value end, and connects power supply VCC with resistance R16 through potentiometer W2.By adjusting potentiometer
W1 and potentiometer W2 cans adjust the output pulse duty factor of two monostable time delay circuits.
The single-chip microcomputer communicates through CH340 interfaces with host computer.CH340 is the switching chip of a usb bus, is realized
USB turns serial ports or USB turns LPT.Realize that single-chip microcomputer and host computer communicate by CH340 interfaces, measurement data result is passed
It is defeated on host computer, the preservation and teacher that facilitate experimental data are commented on.
Described intelligent Newton's ring measuring instrument, in addition to self-checking circuit；The output end of self-checking circuit normally opened is opened by one
Connection connects sync separator circuit；The output end of CCD camera connects sync separator circuit by a normally closed switch
Input.
The self-checking circuit is the adjustable multivibrator of dutycycle being made up of NE555 time base circuits, and its output end is produced
The adjustable pulse of raw dutycycle.The adjustable potentiometer W3 adjusted in self-checking circuit can the different pulse of output duty cycle.
Disconnect CCD camera separated with synchronizing signal between switch (i.e. K1 in Fig. 3), close self-checking circuit with it is synchronous
Switch (i.e. K2 in Fig. 3) between demultiplexing circuit, self-checking circuit and sync separator circuit are connected, make self-test electric
Road produces pulse signal and inputs follow-up sync separator circuit, to carry out instrument testing and detection sync separator circuit
Whether normal work.
Described intelligent Newton's ring measuring instrument, in addition to the temperature sensor being connected with single-chip microcomputer【DS18B20】, for surveying
Measure and show experimental temperature environment.
Described intelligent Newton's ring measuring instrument, in addition to power module, its output+12V and+5V dc sources, for for
Circuit is powered.
The single-chip microcomputer uses STC89C52 single chip, and first display uses conformable display, and described second is aobvious
Show that device uses 1602 liquid crystal displays.
As shown in figure 1, the utility model believes horizontal synchronizing pulse according to horizontal synchronizing pulse signal is included in vision signal
Number separated from vision signal, with the synchronizing signal (trailing edge) while trigger two monostable time delay circuits so that two
Individual monostable time delay circuit produces the monostable pulses of different in width, is produced using the difference of the delay of two monostable time delay circuits
Raw knife switch.The width of gate determines the number of pulse, the distance in kind of the number of pulse and the first display measurement into
Direct ratio.Concrete methods of realizing is：The output pulse signal of two monostable time delay circuits is respectively fed to the INT0 mouths of single-chip microcomputer
(external interrupt 0), the INT1 mouths (external interrupt 1) of single-chip microcomputer；Single-chip microcomputer INT0 mouths and INT1 mouths are each responsible for sampling two lists
The output pulse falling edge of stable state delay circuit, i.e. gate commencing signal and gate end signal, wherein gate commencing signal make
The timer count for obtaining single-chip microcomputer starts, and gate end signal causes the timer count of single-chip microcomputer to stop.Gate starts simultaneously
Signal produces sharp negative pulse through C16 and R17 and Q4 base stage is sent to by D7 and R19, by Q4 paraphase, produces positive spike,
The first display is sent to by C24 again, gate end signal produces sharp negative pulse through C17 and R18 and is sent to three by D6 and R20
Pole pipe Q3 base stage, by Q3 paraphase, positive pulse is produced, then the first display is sent to by C23, then produced on the first display
Raw two white longitudinal direction measurement lines.Width between measurement line can be adjusted by adjusting potentiometer W1 and potentiometer W2.
W1 and W2 can be adjusted in experiment so that measurement line moves on to the position for wanting measurement.Due to two measurement lines on the first display
Distance, the startup of corresponding single-chip microcomputer timer and shut-in time, so two measurement lines and single-chip microcomputer are determined on the first indicator screen
When device count number it is proportional.The count value of certain distance in measured counting and cursor is relatively drawn measurement line
Between actual distance.Assuming that cursor distance is L, single-chip microcomputer is counted as N；Measure certain image point-to-point transmission apart from when, single-chip microcomputer meter
Number is n, then actual measurement distance D=nL/N.
The utility model can measure to Newton's ring image, and small volume, and simple in construction, power consumption is low.
Claims (9)
1. a kind of intelligent Newton's ring measuring instrument, it is characterised in that including sync separator circuit, gate circuit, measurement line production
Raw circuit, single-chip microcomputer, the first display and second display；
The vision signal for the Newton's ring that the input access CCD camera of the sync separator circuit photographs, output end
The horizontal synchronizing pulse signal separated；
The gate circuit includes two monostable time delay circuits；
The output end of sync separator circuit connects the triggering end of two monostable time delay circuits；Two monostable time delay circuits
RC time constants it is different, the pulse width of output signal is different；The output end of two monostable time delay circuits connects respectively
Two external interrupt pin interfaces of single-chip microcomputer, the opening and closing for timer in control single chip computer；The output of single-chip microcomputer
End connection second display, for showing the counting of timer in single-chip microcomputer；
The output end of two monostable time delay circuits is also respectively connected to measure line generation circuit, measures the output end of line generation circuit
It is connected to the first display.
2. intelligent Newton's ring measuring instrument according to claim 1, it is characterised in that the measurement line generation circuit includes electricity
Hinder R17, R18, R19, R20, R21, R22, R23, R24, R25, R26, electric capacity C16, C17, electrochemical capacitor C23, C24, diode
D6, D7 and PNP type triode Q3 and Q4；
The output end of first monostable time delay circuit connects three through electric capacity C16, diode D7 negative pole, positive pole and resistance R19 successively
Pole pipe Q4 base stage；The output end of second monostable time delay circuit is successively through electric capacity C17, diode D6 negative pole, positive pole and electricity
Resistance R20 connects triode Q3 base stage；Power supply VCC connects diode D7 and D6 negative pole through resistance R17 and R18 respectively；
Q3 base stage meets power supply VCC through resistance R21, through resistance R22 with connecing power supply；Q3 emitter stage connects power supply VCC, Q3 current collection
Pole is connected to the first display by electrochemical capacitor C23, and through resistance R23 with connecing power supply；
Q4 base stage meets power supply VCC through resistance R24, through resistance R25 with connecing power supply；Q4 emitter stage connects power supply VCC, Q4 current collection
Pole is connected to the first display by electrochemical capacitor C24, and through resistance R26 with connecing power supply.
3. intelligent Newton's ring measuring instrument according to claim 1, it is characterised in that described two monostable time delay circuits are adopted
With the NE556 chips for being internally integrated two NE555 time base circuits；The discharge end and threshold value end phase of first NE555 time base circuits
Even, and power supply VCC is connected with resistance R15 through potentiometer W1；The discharge end of 2nd NE555 time base circuits is connected with threshold value end, and
Through potentiometer W2 power supply VCC is connected with resistance R16.
4. intelligent Newton's ring measuring instrument according to claim 1, it is characterised in that also including self-checking circuit；Self-checking circuit
Output end pass through the input that normal open switch connects sync separator circuit；
The output end of CCD camera connects the input of sync separator circuit by a normally closed switch.
5. intelligent Newton's ring measuring instrument according to claim 4, it is characterised in that when the self-checking circuit is by NE555
The adjustable multivibrator of dutycycle that base circuit is formed, its output end produce the adjustable pulse of dutycycle.
6. according to intelligent Newton's ring measuring instrument according to any one of claims 1 to 5, it is characterised in that the single-chip microcomputer warp
CH340 interfaces communicate with host computer.
7. according to intelligent Newton's ring measuring instrument according to any one of claims 1 to 5, it is characterised in that also include and monolithic
The connected temperature sensor of machine.
8. according to intelligent Newton's ring measuring instrument according to any one of claims 1 to 5, it is characterised in that also including power supply mould
Block, its output+12V and+5V dc sources, for being powered for circuit.
9. according to intelligent Newton's ring measuring instrument according to any one of claims 1 to 5, it is characterised in that the single-chip microcomputer is adopted
With STC89C52 single chip, first display uses conformable display, and the second display uses 1602 liquid crystal displays.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720383508.3U CN206711473U (en) | 2017-04-13 | 2017-04-13 | A kind of intelligent Newton's ring measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720383508.3U CN206711473U (en) | 2017-04-13 | 2017-04-13 | A kind of intelligent Newton's ring measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206711473U true CN206711473U (en) | 2017-12-05 |
Family
ID=60454989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720383508.3U Expired - Fee Related CN206711473U (en) | 2017-04-13 | 2017-04-13 | A kind of intelligent Newton's ring measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206711473U (en) |
-
2017
- 2017-04-13 CN CN201720383508.3U patent/CN206711473U/en not_active Expired - Fee Related
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| 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: 20171205 Termination date: 20210413 |