CN203443663U - Device for detecting phase difference in Bohr resonance instrument - Google Patents
Device for detecting phase difference in Bohr resonance instrument Download PDFInfo
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- CN203443663U CN203443663U CN201320482370.4U CN201320482370U CN203443663U CN 203443663 U CN203443663 U CN 203443663U CN 201320482370 U CN201320482370 U CN 201320482370U CN 203443663 U CN203443663 U CN 203443663U
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Abstract
The utility model discloses a device for detecting the phase difference in a Bohr resonance instrument. The device is composed of a control unit, a driving motor unit, a damped oscillation unit, a Hall element unit, a detection circuit unit and a follow-up motor unit. The control unit is connected with the driving motor unit, the follow-up motor unit and the detection circuit unit separately through data lines. Hall element in the driving motor unit and the follow-up motor unit are all connected with the control unit through data lines. The driving motor unit and the damped oscillation unit are in mechanical structure connection. The damped oscillation unit and the detection unit are connected with a photoelectric detector tube. According to the utility model, the value of the phase difference between a driving disk and a damped oscillation disk in the Bohr resonance instrument can be accurately calculated, so an operator can more intuitively observe the variation tendency of the phase difference between the driving disk and the damped oscillation disk.
Description
Technical field
The utility model is a kind of new equipment of phase difference detection in bohr resonance instrument, this device comprises instigates the accurate test section of dish and damped vibration dish phase differential and follows damped vibration disc portion, the accurate measurement of phase differential when being applicable to the observation directly perceived of phase differential variation trend before resonating and resonating.Test effect is very good, can accurately detect the phase differential in bohr resonance instrument.
Background technology
Bohr resonance instrument is that in Experiment of College Physics, operating personnel observe resonance effect and detect a kind of instrument of related data, and wherein the detection of phase differential is the substance in resonance laboratory.When starting bohr resonance instrument, follower disk can its pedestal of Automatic-searching 90 ° locate, move to herein, follower disk is out of service, waits for next step operational order.System is set certain leg speed driving damped vibration disc vibration to instigating motor, when operating personnel press while following button, it is benchmark that follower disk be take the last cycle of operation of damped vibration dish, calculates the corresponding speed of follower disk, with this speed, follows the work of damped vibration dish; Until operating personnel, press and stop following after button, follower disk moves to 90 ° of its pedestals with present speed and locates to stop.In the poor process of precision measuring phase position, when instigating dish while moving to its 90 °, single-chip microcomputer detects corresponding phase differential immediately.
Summary of the invention
Technical problem to be solved in the utility model is: a kind of device that accurate Calculation in bohr resonance instrument is instigated dish and damped vibration dish phase differential that solves is provided, can makes operating personnel observe more intuitively the variation tendency of phase differential between the two and can calculate its exact value.
The technical scheme that the utility model adopts is: by control module, instigate electric motor units, damped vibration unit, Hall element unit, testing circuit unit and follow-up motor unit and form, described control module respectively with data line with instigate electric motor units, follow-up motor unit, testing circuit unit and be connected, instigating electric motor units is all connected with data line with control module with the Hall element in follow-up motor unit, instigate electric motor units and be connected with physical construction with damped vibration unit, damped vibration unit is connected with Photoelectric Detection pipe with detecting unit.
Described instigate electric motor units can be provided with instigate motor, instigate dish and eccentric wheel; The described motor of instigating can adopt two-phase stepping motor, and it is contained in and is instigated on motor base by screw, locates to be equipped with a Hall element instigating 90 ° of motor bases, at the top of instigating motor base, places a light emitting diode; Instigate dish and be screwed and be connected with eccentric wheel, this is instigated dish and is contained in and is instigated on motor rotation axis by concentric shafts, is instigating to be provided with one for comparing 0 ° of line of variation of phase differential with follower disk on dish, a cylindrical magnetic iron of this 0 ° of line place placement; Eccentric wheel is contained in and is instigated on motor rotation axis by concentric shafts.
The described electric motor units of instigating can be provided with by stepper motor and drives the motor-drive circuit of instigating that chip THB6128 forms, and the two-phase positive and negative terminal that four terminals that this chip is exported are instigated stepper motor with two-phase is respectively connected.
Described damped vibration unit can comprise damped vibration dish, rocking bar and connecting rod, and one end of described damped vibration dish is connected with the fixing spring being positioned on damped vibration dish fixed pedestal, and the other end of fixing spring is connected with rocking bar; One end of rocking bar is connected with fixing spring, and the other end of rocking bar uses screw to be connected with the eccentric wheel of instigating electric motor units by connecting rod.
Described damped vibration web circle is designed to the shape that a plurality of tongue and grooves are alternate, and each groove, tongue all can be corresponding 1 °.
First photoelectric correlated cell can be placed in center at damped vibration dish tongue, at the boundary of adjacent tongue, can place second photoelectric correlated cell, two photoelectric correlated cells are at a distance of 2.5 °, the output of two photoelectric correlated cells all can be connected with the discriminating direction device in testing circuit unit, the output access single-chip microcomputer of discriminating direction device.
Described control module, its output terminal can be connected respectively and be instigated the input end of electric motor units, the input end of follow-up motor unit by data line, and its input end can pass through the output terminal of data line connection detection circuit unit.This control module can be comprised of peripheral circuit and ATMEGA16L single-chip microcomputer, peripheral circuit comprises clock circuit, reset circuit, follow key circuit and down trigger terminal INT0, down trigger terminal INT1, down trigger terminal INT2, and instigates motor pulses terminal CP0 and follow-up motor pulse terminal CP1.
Described follow-up motor unit can comprise follow-up motor driving circuit, follow-up motor and follower disk; Described follow-up motor can adopt the servo-actuated stepper motor of two-phase, and it is contained on follow-up motor pedestal; The driving circuit of described follow-up motor can adopt THB6128 chip, and this drives four terminals of chip output to be connected with the two-phase positive and negative terminal of the servo-actuated stepper motor of two-phase respectively; Follower disk can be contained in by concentric shafts on the rotation axis of follow-up motor, divides equally design 360 rulings on this follower disk, and every ruling can be corresponding 1 °.
90 ° of described follow-up motor pedestals, locate to place a Hall element, at this follow-up motor pedestal top, can place a light emitting diode.
Described Hall element can adopt CS3020 sensor, 0 ° of follower disk, locates to place a cylindrical magnetic iron.
The utility model compared with prior art has advantages of following main:
One. adopted follow-up motor unit, the side-to-side vibrations of the damped vibration dish of damped vibration unit is followed as uniform circular motion, thereby solved in bohr resonance instrument and accurately measured a difficult problem of instigating dish and follower disk phase differential, and can allow operating personnel observe out the variation tendency between both phase differential more intuitively.
They are two years old. and adopt Hall element unit and distinguished the testing circuit unit of forward and reverse vibration of the damped vibration dish of damped vibration unit, make follower disk can accurately follow the motion conditions in last cycle of damped vibration dish, the follower disk connecting together by concentric shafts can present the variation tendency of instigating dish and damped vibration dish phase differential intuitively with instigating to coil.
They are three years old. can calculate accurately the phase difference value of instigating dish and damped vibration dish.
According to actual loading test gained, the natural period of fixing spring is 1.6s, in instigating the process that the motor speed of instigating slowly brings up to 38r/min by 20r/min, amplitude that observe to find the damped vibration dish in damped vibration unit slowly becomes large, and the phase differential of instigating dish and follower disk slowly becomes greatly, instigates motor speed when reaching 38r/min, its phase differential reaches 93 °, and (this is accurate measured value, theoretical value is 90 °, within error allowed band, is mainly that damped vibration is taken inventory in friction); When rotating speed continues to improve, to observe and find that the amplitude of the damped vibration dish in damped vibration unit slowly diminishes, the phase differential of instigating dish and follower disk slowly becomes large, but phase difference value is less than 180 ° always.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is control module circuit diagram.
Fig. 3 is the schematic diagram of instigating to install on motor base Hall element.
Fig. 4 instigates the schematic diagram that dish is installed cylindrical magnetic iron.
Fig. 5 installs the schematic diagram of Hall element on follow-up motor pedestal.
Fig. 6 is the schematic diagram that cylindrical magnetic iron is installed on follower disk.
Fig. 7 is photoelectric correlated cell scheme of installation.
Fig. 8 is detection cell circuit figure.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is further described.
Phase difference detection device in the bohr resonance instrument that the utility model provides, its structure as shown in Figure 1, by control module with instigate electric motor units and be connected with data line, control module is connected with data line with follow-up motor unit, control module is connected with data line with testing circuit unit, instigate motor Hall element and be all connected with data line with control module with follow-up motor Hall element, instigate electric motor units and be connected with physical construction with damped vibration unit; The output terminal of control module connects the input end of instigating electric motor units by data line, instigate driven by motor eccentric wheel and by physical construction, drive the damped vibration disc vibration of damped vibration unit, the output terminal that Hall element is instigated after dish and the signal of follower disk by detection passes through the input end of data line connection control unit, the output terminal of testing circuit unit is by the input end of data line connection control unit, and the output terminal of control module connects the input end of follow-up motor unit by data line.
The structure of described control module as shown in Figure 2, is comprised of integrated circuit U1 and peripheral circuit, and integrated circuit U1 adopts ATMGEA16L single-chip microcomputer.Peripheral circuit is followed control circuit, down trigger terminal, is instigated that motor pulses sends terminal and follow-up motor pulse transmitting terminal forms by clock circuit, reset circuit, button.Wherein: clock circuit is comprised of the passive crystal oscillator of 8M and two electric capacity; Reset circuit is by button, and electric capacity and resistance form; Button is followed control circuit and is comprised of self-locking button and resistance, and the effect of this resistance is Limited Current size, in case the excessive infringement single-chip microcomputer of electric current.Down trigger terminal is divided into: external interrupt 0 trigger terminal INT0, and external interrupt 1 trigger terminal INT1 and external interrupt 2 trigger terminal INT2, INT0 connects the discriminating direction terminal of discriminating direction device, in order to trigger the external interrupt 0 of single-chip microcomputer, carries out timing program; INT1 connects the Hall element output terminal of follow-up motor unit, in order to trigger the external interrupt 1 of single-chip microcomputer, carries out the speed program of following that changes follow-up motor; INT2 connects the Hall element lead-out terminal of instigating electric motor units, in order to trigger the external interrupt 2 of single-chip microcomputer, carries out the damped vibration dish of accurate Calculation damped vibration unit and instigates to coil phase difference value.CP0 connects the pulse input end of instigating motor-drive circuit; CP1 connects the pulse input end of follow-up motor driving circuit.It is the PD7 mouth of CP1(single-chip microcomputer that follow-up motor pulse sends terminal).Instigating motor pulses transmission terminal is the PB3 mouth of CP0(single-chip microcomputer).
The described electric motor units of instigating with the method that damped vibration unit is connected with physical construction is: the eccentric wheel of instigating in electric motor units is connected with the rocking bar in damped vibration unit by connecting rod.
Described instigate electric motor units comprise instigate motor-drive circuit, instigate motor, instigate dish and eccentric wheel, wherein: instigate motor and select two-phase stepping motor, it is contained in and is instigated on motor base by screw.Instigate dish and be contained in and instigated on motor rotation axis by concentric shafts, this instigates to coil 0 ° of line of design, for comparing the variation of phase differential with follower disk.Eccentric wheel is contained in and is instigated on motor rotation axis by concentric shafts.Instigate motor-drive circuit by driving chip THB6128 to form, the two-phase positive and negative terminal that four terminals of its output are instigated stepper motor with two-phase is respectively connected.The CP signal of the CP0 signal access driving circuit in control module, single-chip microcomputer often sends a pulse, instigates a step angle of motor operation.The rotation of instigating motor drives the side-to-side vibrations of damped vibration dish by eccentric wheel.
Described damped vibration unit is customization converted products, this damped vibration unit comprises damped vibration dish, fixing spring, rocking bar and connecting rod, wherein: one end of damped vibration dish is connected with rocking bar, the other end is connected with the fixing spring being positioned on damped vibration dish fixed pedestal; This damped vibration web circle is designed to the shape that a plurality of tongue and grooves are alternate, 180 of tongues, 180 of grooves, corresponding 1 ° of each groove.Rocking bar is connected with connecting rod, and connecting rod is connected with the eccentric wheel of instigating electric motor units by screw.
Described Hall element unit comprises instigates to coil Hall element circuit and follower disk Hall element circuit, and the Hall element in two circuit all adopts CS3020.
Describedly instigate to coil the Hall element in Hall element circuit, its installation method is: by Hall element be arranged on instigate electric motor units instigate to coil 90 ° of positions of pedestal (Fig. 3), small-sized cylindrical magnetic iron is arranged on instigates to coil 0 ° of position (Fig. 4), and a LED light is installed instigating to coil on pedestal.Single-chip microcomputer in control module, instigating dish when moving to 90 ° of positions, according to the reading of detecting unit, accurately calculates the phase differential of instigating dish and damped vibration dish.
Hall element in described follower disk Hall element circuit, its installation method is: referring to Fig. 5 and Fig. 6,90 ° of follower disk pedestals that Hall element are arranged on to follow-up motor unit are located, and small-sized cylindrical magnetic iron is arranged on 0 ° of position of follower disk, and a LED light is installed on follower disk pedestal.After bohr resonance instrument starts, when Single-chip Controlling follower disk for example, moves to 90 ° of pedestals and locates with certain speed (30r/min), induction Hall element triggers and interrupts, and controls follower disk out of service.When damped vibration dish turns to inverted running by forward operation, the signal that discriminating direction device sends triggers singlechip interruption, calculate the last periodic quantity of damped vibration dish, when follower disk moves to 90 ° of pedestals, induction Hall element sends triggering look-at-me, and Single-chip Controlling follow-up motor changes speed better to follow damped vibration dish.When operating personnel stop follower disk motion, follower disk moves to 90 ° with present speed and locates, and induction Hall element triggers and interrupts, and controls follower disk out of service, and 90 ° of follow-up motor pedestals are located to be made as follower disk operation starting point.
Described testing circuit unit, its structure as shown in Figure 8, is comprised of photoelectric correlated cell (U2, U3), discriminating direction device (U4), wherein: photoelectric correlated cell adopts ST181, its output terminal access discriminating direction device; Discriminating direction device is ST289A * 4 chip, its output terminal access single-chip microcomputer.As shown in Figure 7, the installation site of two ST181 is at a distance of 2.5 ° (ST181 output waveform need differ k π+90 ° to the installation method of photoelectric correlated cell ST181).
The course of work of described testing circuit unit is: during damped vibration disc vibration, photoelectric correlated cell sends pulse change signal, discriminating direction device can be judged the direction of vibration of damped vibration dish, judges the output terminal access single-chip microcomputer of its direction of vibration, in order to trigger, interrupts.
Described follow-up motor unit comprises follow-up motor driving circuit, motor and follower disk, wherein: the driving chip of follow-up motor adopts THB6128 chip, and four terminals of its output are connected with the two-phase positive and negative terminal of the servo-actuated stepper motor of two-phase respectively.Motor is selected the servo-actuated stepper motor of two-phase, and it is contained on follow-up motor pedestal.Follower disk is contained in by concentric shafts on the rotation axis of follow-up motor, divides equally design 360 rulings on this follower disk, corresponding 1 ° of every ruling.The CP signal of the CP1 signal access follow-up motor driving circuit in control module, single-chip microcomputer often sends a pulse, a step angle of stepper motor operation, follower disk is realized the work of following.
The course of work of the present utility model is: described in instigate electric motor units by the speed of its operation of Single-chip Controlling, instigating the damped vibration dish that eccentric wheel that motor drives by it controls in damped vibration unit swings, photoelectric correlated cell in testing circuit unit detects the corresponding signal that damped vibration dish swings and give control module after the analysis of discriminating direction device, control module is carried out corresponding algorithm according to the data that detect and is controlled the vibration that follow-up motor in follow-up motor unit is followed damped vibration dish, swinging of damped vibration dish is mapped as to the circular motion of follower disk, by the motion conditions that compares follower disk and instigate to coil, operating personnel can get information about the variation tendency of the phase differential of resonance effect second best plan Moving plate and damped vibration dish.The accurate detecting method of phase differential is to send corresponding signal controlling control module executable operations by instigating to coil Hall element, accurately calculates the value of the phase differential of bohr resonance instrument second best plan Moving plate and damped vibration dish.
Claims (10)
1. the device of phase difference detection in bohr resonance instrument, it is characterized in that by control module, instigate electric motor units, damped vibration unit, Hall element unit, testing circuit unit and follow-up motor unit and form, described control module respectively with data line with instigate electric motor units, follow-up motor unit, testing circuit unit and be connected, instigating electric motor units is all connected with data line with control module with the Hall element in follow-up motor unit, instigate electric motor units and be connected with physical construction with damped vibration unit, damped vibration unit is connected with Photoelectric Detection pipe with detecting unit.
2. the device of phase difference detection in bohr according to claim 1 resonance instrument, instigates electric motor units and is provided with and instigates motor, instigate dish and eccentric wheel described in it is characterized in that; The described motor of instigating adopts two-phase stepping motor, and it is contained in and is instigated on motor base by screw, locates to be equipped with a Hall element instigating 90 ° of motor bases, at the top of instigating motor base, places a light emitting diode; Instigate dish and be screwed and be connected with eccentric wheel, this is instigated dish and is contained in and is instigated on motor rotation axis by concentric shafts, is instigating to be provided with one for comparing 0 ° of line of variation of phase differential with follower disk on dish, a cylindrical magnetic iron of this 0 ° of line place placement; Eccentric wheel is contained in and is instigated on motor rotation axis by concentric shafts.
3. the device of phase difference detection in bohr according to claim 2 resonance instrument, described in it is characterized in that, instigate electric motor units and be provided with by stepper motor and drive the motor-drive circuit of instigating that chip THB6128 forms, the two-phase positive and negative terminal that four terminals that this chip is exported are instigated stepper motor with two-phase is respectively connected.
4. the device of phase difference detection in bohr according to claim 1 resonance instrument, it is characterized in that described damped vibration unit comprises damped vibration dish, rocking bar and connecting rod, one end of described damped vibration dish is connected with the fixing spring being positioned on damped vibration dish fixed pedestal, and the other end of fixing spring is connected with rocking bar; One end of rocking bar is connected with fixing spring, and the other end of rocking bar uses screw to be connected with the eccentric wheel of instigating electric motor units by connecting rod.
5. the device of phase difference detection in bohr resonance instrument according to claim 4, is characterized in that described damped vibration web circle is designed to the shape that a plurality of tongue and grooves are alternate, all corresponding 1 ° of each groove, tongue.
6. the device of phase difference detection in bohr according to claim 5 resonance instrument, it is characterized in that placing first photoelectric correlated cell in the center of damped vibration dish tongue, boundary at adjacent tongue is placed second photoelectric correlated cell, two photoelectric correlated cells are at a distance of 2.5 °, the output of two photoelectric correlated cells is all connected with the discriminating direction device in testing circuit unit, the output access single-chip microcomputer of discriminating direction device.
7. the device of phase difference detection in bohr according to claim 1 resonance instrument, it is characterized in that described control module, its output terminal is connected respectively and is instigated the input end of electric motor units, the input end of follow-up motor unit by data line, and its input end is by the output terminal of data line connection detection circuit unit; This control module is comprised of ATMEGA16L single-chip microcomputer and peripheral circuit, peripheral circuit comprises clock circuit, reset circuit, follow key circuit and down trigger terminal INT0, down trigger terminal INT1, down trigger terminal INT2, and instigates motor pulses terminal CP0 and follow-up motor pulse terminal CP1.
8. the device of phase difference detection in bohr resonance instrument according to claim 1, is characterized in that described follow-up motor unit comprises follow-up motor driving circuit, follow-up motor and follower disk; Described follow-up motor adopts the servo-actuated stepper motor of two-phase, and it is contained on follow-up motor pedestal; The driving circuit of described follow-up motor adopts THB6128 chip, and this drives four terminals of chip output to be connected with the two-phase positive and negative terminal of the servo-actuated stepper motor of two-phase respectively; Follower disk is contained in by concentric shafts on the rotation axis of follow-up motor, divides equally design 360 rulings on this follower disk, corresponding 1 ° of every ruling.
9. the device of phase difference detection in bohr resonance instrument according to claim 8, is characterized in that locating to place a Hall element 90 ° of described follow-up motor pedestals, and a light emitting diode is placed at follow-up motor pedestal top.
10. the device of phase difference detection in bohr resonance instrument according to claim 9, is characterized in that described Hall element adopts CS3020 sensor, locates to place a cylindrical magnetic iron 0 ° of follower disk.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320482370.4U CN203443663U (en) | 2013-08-07 | 2013-08-07 | Device for detecting phase difference in Bohr resonance instrument |
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| CN201320482370.4U CN203443663U (en) | 2013-08-07 | 2013-08-07 | Device for detecting phase difference in Bohr resonance instrument |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104019801A (en) * | 2014-06-13 | 2014-09-03 | 四川大学 | Method for measuring Bohr resonance phase difference and modifying data through continuous photographing or camera shooting |
| CN104019737A (en) * | 2014-06-13 | 2014-09-03 | 四川大学 | Method for measuring Pohl resonance phase difference by using digital oscilloscope |
| CN108564853A (en) * | 2018-03-14 | 2018-09-21 | 四川大学 | A kind of device accurately adjusting waling stripe for bohr resonance instrument |
| CN110887560A (en) * | 2019-10-23 | 2020-03-17 | 武汉纺织大学 | Phase difference detection method in Bohr resonance instrument |
-
2013
- 2013-08-07 CN CN201320482370.4U patent/CN203443663U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104019801A (en) * | 2014-06-13 | 2014-09-03 | 四川大学 | Method for measuring Bohr resonance phase difference and modifying data through continuous photographing or camera shooting |
| CN104019737A (en) * | 2014-06-13 | 2014-09-03 | 四川大学 | Method for measuring Pohl resonance phase difference by using digital oscilloscope |
| CN104019801B (en) * | 2014-06-13 | 2016-03-30 | 四川大学 | Utilize chronophotograph or videographic measurment glass ear resonance phasic difference and data correcting method |
| CN104019737B (en) * | 2014-06-13 | 2016-08-31 | 四川大学 | Utilize the method that digital oscilloscope measures glass ear resonance phase difference |
| CN108564853A (en) * | 2018-03-14 | 2018-09-21 | 四川大学 | A kind of device accurately adjusting waling stripe for bohr resonance instrument |
| CN110887560A (en) * | 2019-10-23 | 2020-03-17 | 武汉纺织大学 | Phase difference detection method in Bohr resonance instrument |
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