CN106898202B - Integrate the experimental bench of physics teaching and student's study - Google Patents
Integrate the experimental bench of physics teaching and student's study Download PDFInfo
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- CN106898202B CN106898202B CN201710272876.5A CN201710272876A CN106898202B CN 106898202 B CN106898202 B CN 106898202B CN 201710272876 A CN201710272876 A CN 201710272876A CN 106898202 B CN106898202 B CN 106898202B
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- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
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Abstract
The experimental bench for integrating physics teaching and student's study, for promoting student to the grasp and study of physical knowledge and convenient for the teaching of teacher.It includes support base and supporting table, the top of support base is arranged in supporting table, supporting leg is equipped in the bottom of support base, the first experiment porch and the second experiment porch are equipped in supporting table, first, second experiment porch is rotatably installed on lifting frame, and the lifting mechanism that driving lifting frame moves up and down is equipped in supporting table；The turnover mechanism of driving the first, second experiment porch rotation is equipped on lifting frame；It is equipped with friction measurement unit on the first experiment porch, test the speed unit and skewback unit are equipped on the second experiment porch.The measurement to frictional force may be implemented in the setting of friction measurement unit, and the measurement to average speed may be implemented in the setting for the unit that tests the speed, and the setting of skewback unit can promote understanding of the student to this physical model of skewback.
Description
Technical field
Learn to use teaching aid technical field the present invention relates to student, specifically a kind of collection physics teaching and student's study are
The experimental bench of one.
Background technique
In the learning process of student, especially in the learning process of Physics Course, for the palm of some physical knowledges
Holding situation needs the experiment that seeing is believing to guarantee.And in some cases, also only experiment could illustrate physical principle, promote
Study into student to physical knowledge.
Summary of the invention
The purpose of the present invention is to provide a kind of experimental benches for integrating physics teaching and student's study, learn for promoting
Raw grasp and study to physical knowledge and the teaching convenient for teacher.
The technical scheme adopted by the invention to solve the technical problem is that: integrate the reality of physics teaching and student's study
Platform is tested, it includes support base and supporting table, and the top of support base is arranged in the supporting table, is equipped in the bottom of the support base
Supporting leg, characterized in that be equipped with the first experiment porch and the second experiment porch, the first, second experiment porch on the supporting table
It is rotatably installed on a lifting frame respectively, the lifting mechanism that driving lifting frame moves up and down is equipped in supporting table；It is lifting
Frame is equipped with the first, second experiment porch of driving in the turnover mechanism of vertical rotation in surface；
Friction measurement unit is equipped on first experiment porch, the friction measurement unit includes setting the
The degree of roughness of several first experiment tracks, the cushion and each cushion that are arranged on the first experiment track on one experiment porch is not
Translation that is identical, moving along a straight line the first sliding shoe being arranged on cushion and the first sliding shoe is pulled to do uniform rectilinear's movement
Mechanism, the translation mechanism mainly include translation motor, the first runner that translation motor output end is arranged in, are arranged at first turn
Take turns between the first sliding shoe weight beam, the first sliding shoe of connection and weight beam and connecting spring dynamometer and
The connecting rope of first runner；
The unit that tests the speed is equipped on second experiment porch, the unit that tests the speed includes being arranged on the second experiment porch
The second experiment track, the second sliding shoe that is arranged in along line activities on the second experiment track, setting second test track
The transmitting pedestal in left side, the expelling plate being movably arranged on the inside of transmitting pedestal are arranged in expelling plate and emit the hair between pedestal
Projectile spring, be arranged in second experiment track on the right side of cushion, left and right settings second experiment track on first sensor and
Second sensor, the dial plate being arranged on the second experiment porch, the vertical pivot that dial plate center is set, the finger being arranged on vertical pivot
Needle, the timing motor for driving vertical axis, the timing motor, first sensor and second sensor connect with controller signals
It connects；
Skewback unit is additionally provided on second experiment porch, the skewback unit includes being hingedly mounted on the second experiment
Skewback on platform, the third sliding shoe being placed on skewback, the lifting being arranged between the second experiment porch and skewback bottom
Cylinder, the range sensor being arranged in inside sensor stand, is arranged in sensor branch the sensor stand being arranged on skewback
Buffer board between frame and third sliding shoe, the buffer spring being arranged between buffer board and sensor stand, in the buffering
Plate is equipped with the circular hole of face range sensor；
Walking unit is equipped between the supporting leg, the walking unit mainly includes being arranged between two supporting leg of front and back
Connecting shaft, the both ends for being fixed on connecting shaft and the movable block of connection is slided up and down with supporting leg, is rotatably installed in connecting shaft both ends
Wheel carrier, the back-moving spring being arranged between movable block and supporting leg, is arranged in supporting leg and work the traveling wheel being rotatably installed on wheel carrier
The pulling mechanism of lockable mechanism and the work of driving lockable mechanism or failure between motion block；
The lockable mechanism includes the lock device being arranged on supporting leg, the slide plate being slidably mounted in lock device inner cavity, consolidates
The lock pin that is scheduled on slide plate, the locking spring being arranged between lock device and slide plate, the latch being fixed on movable block,
The effect end of lock pin is extend into the locking hole on latch under the action of locking spring, in the locking being placed in outside lock device
Baffle is fixed on pin；
The pulling mechanism includes the shaft being rotatably installed between the supporting leg of front and back, the handle being fixed in shaft, rotation
The lower line wheel for being mounted on supporting leg lower part, the drive bevel gear for being fixed on both ends of the shaft are engaged and are rotatablely installed with drive bevel gear
The upper line wheel of driven wheel of differential, setting coaxial with driven wheel of differential on supporting leg and setting baffle and upper line wheel outer wall it
Between bracing wire, and bracing wire is contacted with the outer wall of lower line wheel.
Further, the lifting mechanism includes the cam motor being fixed in supporting table inner cavity, is fixed on cam motor
Cam on output shaft, the connecting rod being arranged between cam highest point and lifting frame, are fixed with hollow in the bottom of lifting frame
Motion bar is equipped with the fixed link being slidably connected with motion bar in the inner cavity of supporting table.
Further, the turnover mechanism includes the overturning motor being fixed on lifting frame, is fixed on overturning motor output
Worm screw on axis, the worm gear for engaging cooperation with worm screw and being fixed on the first experiment porch or the second experiment porch.
Further, the translation mechanism further include the second runner being rotatably installed on the first experiment porch, setting exist
Bridge between first runner and the second runner, the tension pulley support being arranged on the inside of bridge, setting tension pulley support with across
The contacts-side-down of tensioning spring between beam, the tensioning wheel being rotatably installed on tension pulley support, connecting rope and tensioning wheel and with
The upper contact of second runner.
Further, angle measuring unit is equipped on second experiment porch, the angle measuring unit includes hinge
Connect the fan-shaped bevel protractor being mounted on the second experiment porch, the fan-shaped drive block and drive block being fixedly connected with bevel protractor
Meshed gears, the rotation of sliding tooth wheel telescope motor, the articulated shaft of the bevel protractor and the coaxial setting of the articulated shaft of skewback,
The side of skewback is equipped with marking line, and the extended line of marking line passes through the hinge joint of skewback.
Further, the traveling wheel on the wheel carrier is three and is located on three vertex of triangle.
Further, it is equipped with ball in the side of the first, second sliding shoe, the ball is real with first, second
Test the inner wall contact of track.
The beneficial effects of the present invention are: the experimental bench provided by the invention for integrating physics teaching and student's study, row
The setting for walking unit can be in order to the movement of entire experimental bench；The setting of friction measurement unit can be real on first experiment porch
Now to the measurement of frictional force, promote study of the student to frictional force；The setting of unit of testing the speed on second experiment porch may be implemented
Measurement to average speed promotes understanding of the student to average speed；The setting of skewback unit, Ke Yishi on second experiment porch
Now to the measurement of the frictional force on skewback, promote understanding of the student to this physical model of skewback.
Detailed description of the invention
Fig. 1 is schematic diagram of the invention；
Fig. 2 is the scheme of installation of traveling wheel；
Fig. 3 is the scheme of installation of wheel carrier；
Fig. 4 is the schematic diagram of internal structure of supporting leg；
Fig. 5 is the scheme of installation of wheel carrier and traveling wheel；
Fig. 6 is the cooperation schematic diagram of lockable mechanism, bracing wire；
Fig. 7 is the schematic diagram of internal structure of lockable mechanism；
Fig. 8 is the scheme of installation of upper line wheel；
Fig. 9 is the inner wall structure diagram of lock device；
Figure 10 is the structural schematic diagram of slide plate；
Figure 11 is A in Fig. 1 to local direction view；
Figure 12 is the schematic diagram of the first experiment porch；
Figure 13 is the schematic diagram of friction measurement unit；
Figure 14 is the schematic diagram of the first experiment track；
Figure 15 is partial enlarged view at the B in Figure 13；
Figure 16 is partial enlarged view at the C in Figure 13；
Figure 17 is the position view of tensioning wheel；
Figure 18 is the schematic diagram of tension pulley support；
Figure 19 is the schematic diagram of lifting mechanism；
Figure 20 is partial enlarged view at the D in Figure 19；
Figure 21 is the schematic diagram of the second experiment porch；
Figure 22 is the schematic diagram of unit of testing the speed；
Figure 23 is the schematic diagram of skewback unit；
Figure 24 is the scheme of installation of skewback；
Figure 25 is the scheme of installation of bevel protractor；
Figure 26 is the driving schematic diagram of bevel protractor；
Figure 27 is schematic diagram of the experiment body by static change when mobile after skewback rises on skewback；
In figure: 1 support base, 11 supporting legs, 111 spring cavitys, 112 slide block chambers, 113 bracing wire chambers, 114 installation cavitys, 115 circular holes,
12 supporting tables, 13 back-moving springs, 131 guide posts, 14 lock devices, 141 slide plates, 142 lock pins, 143 baffles, 144 end caps, 145
Rotating ring, 146 locking springs, 147 elongated slots, 148 balls, 15 bracing wires, 151 lower line wheels, line wheel on 152,16 driven wheel of differential,
161 drive bevel gears, 17 shafts, 171 fixed rings, 172 handles, 18 sealing covers；
2 wheel carriers, 21 traveling wheels, 22 connecting shafts, 23 bearings, 24 movable blocks, 25 latch；
3 first experiment porch, 30 shafts, 31 first experiment tracks, 32 cushions, 33 translation motors, 34 first runners, 341
Second runner, 35 first sliding shoes, 351 otic placodes, 352 Weight boxes, 353 ball, 36 tensioning wheels, 361 tension pulley supports, 37 across
Beam, 371 tensioning springs, 38 connecting ropes, 39 weight beams；
4 lifting frames, 41 reinforcing ribs, 42 motion bars, 43 fixed links, 44 supporting plates, 441 supporting plate trunnions, 45 cams, 451 connecting rods,
46 cam motors, 461 motor support frames, 47 worm gears, 471 worm screws, 472 overturning motors；
5 second experiment porch, 51 second experiment tracks, 52 transmitting pedestals, 521 transmitting springs, 522 expelling plates, 53 second
Sliding shoe, 541 first sensors, 542 second sensors, 55 cushions, 56 dial plates, 561 vertical pivots, 562 pointers；
6 skewbacks, 60 skewback trunnions, 61 third sliding shoes, 611 counterweight chambers, 62 directive wheels, 63 sensor stands, 64 distances
Sensor, 65 buffer boards, 651 buffer springs, 66 is hinged, 67 marking lines, 68 lifting cylinders, 681 cylinder trunnions；
7 bevel protractors, 70 angle lines, 71 ruler rings, 72 drive blocks, 73 gears, 74 telescope motors.
Specific embodiment
As shown in Fig. 1 to Figure 27, the invention mainly comprises support base 1, walking unit, supporting table 12, the first experiment porch,
Friction measurement unit, the second experiment porch, the unit that tests the speed, skewback unit and angle measuring unit, with reference to the accompanying drawing to each
Part is described in detail.
Support base:
It as shown in Figure 1, support base 1 is the support member of cuboid, and is hollow structure, for installing other components.
Supporting leg 11 there are four setting in the bottom of support base, supporting leg is for realizing the support to support base.It is entire real by the setting of supporting leg
That tests that platform can consolidate is placed in indoor environment, for convenience of the movement of entire experimental bench, is equipped with walking unit between the legs.
Walking unit:
As shown in Figure 2 and Figure 3, walking unit is arranged between two pairs of supporting legs of left and right arrangement, and between two supporting leg of front and back
Equipped with a walking unit.Walking unit mainly includes wheel carrier 2, traveling wheel 21, lockable mechanism and relieving mechanism.
As shown in figure 4, the spring cavity 111 and slide block chamber 112 of connection setting up and down are equipped on the right side of supporting leg, in supporting leg
Left side is equipped with bracing wire chamber 113, and installation cavity 114 is equipped between the lower part and slide block chamber of bracing wire chamber, is equipped in the top of bracing wire chamber
Circular hole 115, circular hole is connected to bracing wire chamber and the axis of circular hole is located in horizontal plane.
As shown in figure 5, wheel carrier 2 is triangular structure, it is rotatably equipped with a traveling wheel respectively on three angles of wheel carrier
21, each walking unit includes two wheel carriers 2, and two wheel carriers pass through the both ends that bearing 23 is rotatably installed in connecting shaft respectively, taking turns
Frame is equipped with blind hole, and bearing is fixed in blind hole.The movable block of " 7 " font is also respectively fixed at the both ends of each connecting shaft
24, it is fixed with the latch 25 of triangle on the inside of movable block, locking hole is equipped on the inclined-plane of latch.Connecting shaft both ends
Movable block be placed in corresponding spring cavity 111, between the top of movable block and the top of spring cavity be equipped with back-moving spring 13,
To realize to the guiding of back-moving spring, the guide post 131 being placed on the inside of back-moving spring is fixed at the top of spring cavity.It is tensing
Under the action of spring, the bottom of the traveling wheel of lower section is higher than the bottom surface of supporting leg.Connecting shaft is slammed with foot to be pressed downward, and can be driven down
Two traveling wheels and ground face contact of side.At this time to realize the locking to wheel carrier, lockable mechanism is equipped between movable block and supporting leg.
As shown in fig. 7, lockable mechanism includes lock device 14, slide plate 141, lock pin 142, baffle 143, end cap 144, locking
Spring 146 and ball 148, lock device are the hollow structure of open at one end, are slidably fitted with slide plate in the inner cavity of lock device
141, as shown in figure 9, several elongated slots 147 equally distributed on the same circumference are equipped on the inner wall of lock device, such as Figure 10 institute
Show, several balls 148 being uniformly arranged in the circumferential direction are equipped on the circular outer wall of slide plate, and ball can do 360 degree on slide plate
Rotation, a part of ball is placed in elongated slot after slide plate is placed in lock device inner cavity.Lock pin 142 is fixed on slide plate,
The open end of lock device is equipped with end cap 144, and end cap is equipped with the rotating ring 145 being threadedly coupled with lock device.In end cap and slide plate
Between be equipped with locking spring 146, under the action of locking spring lock pin effect end stretch out lock device, outside lock device
Baffle 146 is fixed on lock pin.
As shown in fig. 6, being to have bracing wire 15 on baffle, one end of bracing wire and baffle are connected, and the other end of bracing wire is fixed on
On the outer wall of upper line wheel 152, online wheel is rotatably installed in circular hole, is equipped with lower line wheel 151 in the lower rotational of bracing wire chamber, is drawn
Line is fixed on line wheel outer wall after bypassing lower line wheel.As shown in figure 8, the setting coaxial with driven wheel of differential 16 of upper line wheel.Such as Fig. 3
It is shown, it is equipped with shaft 17 between the top of two supporting legs, is respectively fixed with drive bevel gear 161, initiative taper at the both ends of shaft
Gear is engaged with driven wheel of differential.Bearing 23 is equipped in circular hole, shaft is fixed in the inner ring of bearing.To realize to circular hole
Closing, is further fixed on sealing cover 18 in circular hole.For the rotation convenient for drive shaft, fixed ring is fixed in the middle part of shaft
171, handle 172 is fixed in fixed ring.
It, can be real by the rotation of traveling wheel after connecting shaft is pressed downward and is realized by lockable mechanism to the locking of movable block
Now to the movement of entire experimental bench.Swing handle, the rotation of drive shaft can drive at this time so that bracing wire lifts upwards
Dynamic lock pin is mobile to the side far from movable block, after lock pin is removed from the locking hole on movable block, in back-moving spring
Under the action of traveling wheel move up.
It is equipped with support platform 12 at the top of support base, the first experiment porch 3 and the second experiment porch 5 are equipped in supporting table.
As shown in figure 11, friction measurement unit is equipped on the first experiment porch.
Friction measurement unit:
As shown in Figure 12 and Figure 13, friction measurement unit includes the first experiment track 31, cushion 32, translation motor 33, the
One runner 34, the second runner 341, the first sliding shoe 35, Weight box 352, tensioning wheel 36, bridge 37 and connecting rope 38, such as Figure 14
Shown, the first experiment track 31 is the multiple groups being arranged at the top of the first experiment porch, and every group includes two tracks disposed in parallel
Plate, is equipped with cushion 32 between two track plates, and the mat surface roughness that each group first is tested in track is different.It is real first
It tests and is equipped with the first sliding shoe 35 in track, the bottom of the first sliding shoe is contacted with cushion, as shown in figure 15, in the first sliding shoe
Two sides are respectively equipped with ball 353, and the major part of ball is placed in the first sliding shoe and can do 360 with respect to the first sliding shoe
Degree rotation, ball can guarantee that the first sliding shoe tests track first with the first experiment rail contact, the setting of ball
Inside move in a straight line.Be equipped with the otic placode 351 of a pair of of left and right settings at the top of the first sliding shoe, the top of the first sliding shoe also
Equipped with multiple Weight boxes 352.That track is tested at each group first is respectively arranged on the left side and the right side a translation motor 33, such as Figure 16
It is shown, it is fixed with the first runner 34 in the output end of translation motor, as shown in figure 17, is rotatably equipped on the first experiment porch
Second runner 341 is equipped with inverted U-shaped bridge 37 between the first, second runner, is equipped on the inside of bridge and is slidably connected with bridge
Tension pulley support 361, as shown in figure 18, tension pulley support is inverted U-shaped.Tensioning is rotatably equipped on tension pulley support
Wheel 36, tensioning wheel and the first, second runner are located on three vertex of triangle, are set between tension pulley support and bridge
There is tensioning spring 371.Two otic placodes and two first runners correspond, and connecting rope is equipped between corresponding otic placode and the first runner
38, one end of connecting rope ties up on otic placode, and the other end of connecting rope is fixed on the outer wall of the first runner, and connecting rope and tensioning
Wheel and the contact of the second runner outer wall.Connecting rope is straightened under the action of tensioning spring.
Translation motor, the first runner, the second runner, tensioning wheel and connecting rope constitute translation mechanism, and two translation mechanisms
In translation motor work alternatively, be additionally provided with weight beam 39 in a connecting rope wherein.When right side translation mechanism works,
Translation motor in the translation mechanism of right side drives the first runner to rotate clockwise, and the translation motor in the translation mechanism of left side is not at this time
Movement, the first runner is unresisted rotates clockwise around translation motor output shaft.When left side translation mechanism works, left side translates machine
Translation motor in structure drives the first runner to rotate counterclockwise, at this time the translation motor in the translation mechanism of right side be failure to actuate, first
Runner is unresisted to be rotated counterclockwise around translation motor output shaft.That is, the first runner in the translation mechanism of left side can translate
It is rotated counterclockwise under the drive of motor, but when the translation motor in the translation mechanism of left side does not work, the first runner can be with non-resistance
Rotate clockwise.The first runner in the translation mechanism of right side can rotate clockwise under the drive of translation motor, but right side
When translation motor in translation mechanism does not work, the first runner unresisted can be rotated counterclockwise.The work of right side translation mechanism
When the first sliding shoe can be pulled at the uniform velocity to move right, the reading on weight beam can be read at this time, which is first
Frictional force between sliding shoe and cushion.According to calculation formula f=μ N of frictional force, counterweight can be added in Weight box, increase
Normal pressure between first sliding shoe and cushion, it is related with normal pressure with the size for verifying frictional force.The coarse journey of different cushions
Degree is different, and then the friction factor μ of different cushions is different, and then it can be concluded that frictional force conclusion related with friction factor μ.?
It is same first experiment track in, keep the first sliding shoe on counterweight quantity it is constant, it is also possible that translation motor export it is different
Revolving speed watches the reading on weight beam again, and then studies whether frictional force with the speed of object has relationship.It can also only set
Set the first runner, remove the second runner and tensioning wheel, one end of connecting rope are fixed on the outer wall of the first runner, connecting rope it is another
One end ties up on the first sliding shoe.
When not using the experimental bench, the first experiment porch can be reversed into 180 degree.As shown in figure 19, support base with
Lifting mechanism is equipped between first experiment porch.Lifting mechanism includes lifting frame 4, motion bar 42, fixed link 43, supporting plate 44, convex
Wheel 45, connecting rod 451, cam motor 46, worm gear 47, worm screw 471 and overturning motor 472, lifting frame is U-shaped structure, real first
The both ends for testing platform are respectively equipped with shaft 30, and shaft is rotatably installed on lifting frame.It is equipped with reinforcing rib 41 on lifting frame, is lifting
The bottom for rising frame is fixed with hollow motion bar 42, fixed link 43 is equipped in the inner cavity of support base, the top of fixed link is placed in
In the inner cavity of motion bar and the two is slidably connected.It is fixed with supporting plate 44 in the bottom of lifting frame, it is fixed in the inner cavity of support base
There is motor support frame 461, cam motor 46 is fixed on motor support frame, is fixed with cam in the output end of cam motor
45, it is fixed with supporting plate trunnion 441 in the bottom of supporting plate, connecting rod 451 is equipped between supporting plate trunnion and cam.Cam motor work
When, lifting frame moving up and down together with the first experiment porch can be driven.As shown in figure 20, it is fixed in a shaft wherein
Worm gear 47 is fixed with overturning motor 472 on lifting frame, is fixed with worm screw 471, worm and wheel in the output end of overturning motor
Engagement, overturning motor, worm and worm wheel constitute turnover mechanism, and turnover mechanism can drive the first experiment porch perpendicular when working
Straight rotation in surface, and every first experiment porch of movement of turnover mechanism overturns 180 degree.The upper surface of first experiment porch is downward
Afterwards, friction measurement unit is just hidden in support base inner cavity.When needing to hide the upper surface of the first experiment porch, drive first
Cam motor movement, so that lifting frame moves down, after lifting frame is displaced downwardly to minimum point, driving overturning motor action, so that first
Experiment porch overturns 180 degree, finally lifting frame is driven to reset.
It is equipped with the second experiment porch in the front side of the first experiment porch, the second experiment porch is placed in the square hole at the top of supporting table
In.The unit that tests the speed is equipped on the second experiment porch.
Test the speed unit:
As shown in figure 21, the unit that tests the speed includes the second experiment track 51, transmitting pedestal 52, the transmitting sliding of spring 521, second
Block 53, first sensor 541, second sensor 542, dial plate 56, vertical pivot 561 and pointer 562, the second experiment track includes parallel
Two track plates being arranged are equipped with the second sliding shoe 53 between two track plates and set as shown in figure 22 in the two sides of the second sliding shoe
There is the ball contacted with track plates, the second sliding shoe moves along a straight line on the second experiment track under the action of ball.
It is equipped with the transmitting pedestal 52 of U-shaped in the left side of the second experiment track, emits open end and the second experiment rail contact of pedestal,
Emit and be equipped with expelling plate 522 on the inside of pedestal, transmitting spring 521 is equipped between expelling plate and transmitting pedestal, is needed sliding by second
When motion block is released, so that the second sliding shoe is contacted simultaneously compressed transmissions spring with expelling plate, then unclamp the second sliding shoe.For reality
Now to the tachometric survey of the second sliding shoe, it is equipped with first sensor 541 and second sensor 542 in the second experiment track, the
The distance between one sensor and second sensor are L, and L value is constant.It is equipped with cushion 55 in the end of the second experiment track,
To prevent the second sliding shoe from going out the second experiment track.Cushion can be the rubber parts full of gas, or sponge member.?
It is additionally provided with dial plate 56 on second experiment porch, time scale line is equipped on dial plate, is equipped with vertical pivot 561 at the center of dial plate,
It is fixed with pointer 562 on vertical pivot, the timing motor of driving vertical axis, timing motor and control are equipped on the second experiment porch
The connection of device signal, controller are connect with the first, second sensor signal, and when the second sliding shoe passes through first sensor, first is passed
Sensor sends signal to controller, and controller controls timing motor movement, and vertical axis, starts timing at this time；The second sliding shoe
When by second sensor, second sensor sends signal to controller, and controller controls timing motor stopping movement, erects at this time
Axis stops operating, and timing terminates.The time shown in pointer is the second sliding shoe by the first, second sensor on dial plate at this time
Time t, the average speed V of the second sliding shoe can be measured at this time.The decrement for emitting spring is bigger, the second sliding shoe
Initial velocity is bigger, and the average speed value V measured at this time is bigger.Herein also it can be concluded that the deformation of spring is bigger, spring
Elastic force with regard to smaller.
Skewback unit:
On the second experiment porch be equipped with skewback unit, skewback unit include skewback 6, third sliding shoe 61, directive wheel 62,
Range sensor 64, buffer board 65, buffer spring 651 and lifting cylinder 68, as shown in figure 23, skewback are the elongate configuration of U-shaped,
It is equipped with third sliding shoe 61 in the inside of skewback, directive wheel 62 is rotatably equipped with respectively in the two sides of third sliding shoe, in skewback
Inner wall be equipped with limiting slot, a part of directive wheel is placed in limiting slot, and the setting of limiting slot and directive wheel can prevent the
The disengaging of three sliding shoes and skewback.It is equipped with counterweight slot 611 at the top of third sliding shoe, for placing counterweight.As shown in figure 24,
The right end of skewback hinged 66 is mounted in supporting table, is equipped with sensor stand 63 in the right end of skewback, is set in sensor stand
There is range sensor 64, buffer board 65 is additionally provided on the inside of skewback, buffering elastic is equipped between buffer board and sensor stand
Spring 651.It is equipped with marking line 67 in the side of skewback, the extended line of marking line passes through the hinge joint of skewback, and marking line answers color bright
It is aobvious.Be fixed with skewback trunnion 60 in the bottom of skewback, in the inner cavity of supporting table be equipped with cylinder trunnion 681, cylinder trunnion with
Lifting cylinder 68 is equipped between skewback trunnion, lifting cylinder can drive the swing of skewback when acting.In physical knowledge, it is placed in
Frictional force suffered by object on inclined-plane is that f=μm gcos θ, θ is the tilt angle on inclined-plane.Component of the object gravity along inclined-plane is
F1=mgsin θ, as F1 > f, the object on inclined-plane starts to move down along inclined-plane, i.e. mgsin θ > μm gcos θ, tan θ > μ.It is right
For specific inclined-plane, μ is definite value, therefore θ value can determine.To realize the measurement to θ, and then μ is obtained, in the second experiment
Platform is equipped with angle measuring unit.
Angle measuring unit:
As shown in figure 25, it is rotatably equipped with fan-shaped bevel protractor 7 on the second experiment porch, the articulated shaft of bevel protractor and tiltedly
The articulated shaft of block is collinearly arranged.Ruler ring 71 is equipped on bevel protractor, bevel protractor is hinged by ruler ring and the second experiment porch.At angle
Fan-shaped drive block 72 is fixed on degree ruler, bevel protractor and drive block constitute a semicircle, in the arc-shaped outer wall of drive block
Be equipped with tooth, on the second experiment porch be equipped with telescope motor 74, telescope motor output end be equipped with gear 73, gear with
Drive block engagement cooperation.The rotation of drive block, and then the rotation of driving angle ruler are driven by telescope motor.It is oblique when needing to measure
When the tilt angle of block, as shown in figure 25, driving telescope motor movement is so that the zero graduation line of bevel protractor is concordant with horizontal plane.It drives
Dynamic lifting cylinder movement, so that skewback is around hinged spot wobble, with the continuous swing of skewback, third sliding shoe is along bevel direction
Component is increasingly greater than the frictional force of third sliding shoe, when third sliding shoe is equal to rubbing for third sliding shoe along the component of bevel direction
When wiping power, it is mobile that third slides BOB(beginning of block).Range sensor perceives the movement of third sliding shoe, range sensor and control at this time
Device signal connection processed, range sensor send signal to controller, and controller is connect with the solenoid signal of lifting cylinder again, is controlled
Device processed sends signal to lifting cylinder solenoid valve, so that lifting cylinder stopping acts, as shown in figure 27, skewback and horizontal plane at this time
Between included angle value can be measured by bevel protractor and marking line instruction angle value.To guarantee range sensor
It smoothly realizes the detection to distance between third sliding shoe and range sensor, face range sensor is equipped on buffer board
Circular hole.
When not using the experimental bench, the second experiment porch can also be reversed into 180 degree.Second experiment porch and supporting table
Between also be provided with lifting mechanism, it is lifting mechanism structure between the lifting mechanism and the first experiment porch and supporting table, worked
Journey is identical.
Claims (7)
1. integrating the experimental bench of physics teaching and student's study, it includes support base and supporting table, the supporting table setting
On the top of support base, supporting leg is equipped in the bottom of the support base, characterized in that be equipped with the first experiment on the supporting table
Platform and the second experiment porch, the first, second experiment porch are rotatably installed on a lifting frame respectively, are equipped in supporting table
The lifting mechanism that driving lifting frame moves up and down；The first, second experiment porch of driving is equipped on lifting frame to turn in vertical plane
Dynamic turnover mechanism；
Friction measurement unit is equipped on first experiment porch, the friction measurement unit includes that setting is real first
Test the degree of roughness not phase of several first experiments tracks on platform, the cushion and each cushion that are arranged on the first experiment track
Translation machine that is same, moving along a straight line the first sliding shoe being arranged on cushion and the first sliding shoe is pulled to do uniform rectilinear's movement
Structure, the translation mechanism mainly include translation motor, the first runner that translation motor output end is arranged in, are arranged in the first runner
Weight beam between the first sliding shoe connect the first sliding shoe and weight beam and connecting spring dynamometer and
The connecting rope of one runner；
It is equipped with and tests the speed unit on second experiment porch, the unit that tests the speed includes the be arranged on the second experiment porch
Two experiment tracks, the second sliding shoe being arranged on the second experiment track along line activities, setting are on the left of the second experiment track
Transmitting pedestal, be movably arranged on transmitting pedestal on the inside of expelling plate, be arranged in expelling plate and emit pedestal between transmitting bullet
The first sensor and second of spring, the cushion being arranged on the right side of the second experiment track, left and right settings on the second experiment track
Sensor, the vertical pivot that dial plate center is arranged in, the pointer being arranged on vertical pivot, drives the dial plate being arranged on the second experiment porch
The timing motor of dynamic vertical axis, the timing motor, first sensor and second sensor are connect with controller signals；
Skewback unit is additionally provided on second experiment porch, the skewback unit includes being hingedly mounted on the second experiment porch
On skewback, be placed on skewback third sliding shoe, be arranged between the second experiment porch and skewback bottom lifting cylinder,
The sensor stand that is arranged on skewback, the range sensor being arranged in inside sensor stand, setting sensor stand with
Buffer board between third sliding shoe, the buffer spring being arranged between buffer board and sensor stand, on the buffer board
Circular hole equipped with face range sensor；
Walking unit is equipped between the supporting leg, the walking unit mainly includes the connection being arranged between two supporting leg of front and back
Axis, the both ends for being fixed on connecting shaft and with supporting leg slide up and down the movable block of connection, the wheel carrier for being rotatably installed in connecting shaft both ends,
The traveling wheel that is rotatably installed on wheel carrier, is arranged in supporting leg and movable block the back-moving spring being arranged between movable block and supporting leg
Between lockable mechanism and driving lockable mechanism work or failure pulling mechanism；
The lockable mechanism includes the lock device being arranged on supporting leg, the slide plate being slidably mounted in lock device inner cavity, is fixed on
Lock pin on slide plate, the locking spring being arranged between lock device and slide plate, the latch being fixed on movable block, in locking
The effect end of lock pin is extend into the locking hole on latch under the action of spring, on being placed in the lock pin outside lock device
It is fixed with baffle；
The pulling mechanism includes the shaft being rotatably installed between the supporting leg of front and back, the handle being fixed in shaft, rotational installation
Supporting leg lower part lower line wheel, be fixed on both ends of the shaft drive bevel gear, engaged with drive bevel gear and be rotatably installed in branch
The upper line wheel of driven wheel of differential, setting coaxial with driven wheel of differential on leg and it is arranged between baffle and upper line wheel outer wall
Bracing wire, and bracing wire is contacted with the outer wall of lower line wheel.
2. the experimental bench according to claim 1 for integrating physics teaching and student's study, characterized in that the lifting
Mechanism includes the cam motor being fixed in supporting table inner cavity, the cam being fixed on cam motor output shaft, is arranged in cam
Connecting rod between highest point and lifting frame is fixed with hollow motion bar in the bottom of lifting frame, sets in the inner cavity of supporting table
There is the fixed link being slidably connected with motion bar.
3. the experimental bench according to claim 1 for integrating physics teaching and student's study, characterized in that the overturning
Mechanism includes the overturning motor being fixed on lifting frame, the worm screw being fixed on overturning motor output shaft, engages cooperation with worm screw
And it is fixed on the worm gear on the first experiment porch or the second experiment porch.
4. the experimental bench according to claim 1 for integrating physics teaching and student's study, characterized in that the translation
Mechanism further include the second runner being rotatably installed on the first experiment porch, be arranged between the first runner and the second runner across
Beam, the tensioning spring being arranged between tension pulley support and bridge, is rotatably installed in the tension pulley support being arranged on the inside of bridge
The contacts-side-down of tensioning wheel on tension pulley support, connecting rope and tensioning wheel and upper contact with the second runner.
5. the experimental bench according to claim 1 for integrating physics teaching and student's study, characterized in that described the
Two experiment porch are equipped with angle measuring unit, and the angle measuring unit includes the fan being hingedly mounted on the second experiment porch
The bevel protractor of shape, the fan-shaped drive block being fixedly connected with bevel protractor are stretched with what drive block meshed gears, sliding tooth wheel rotated
Contracting motor, the articulated shaft of the bevel protractor and the coaxial setting of the articulated shaft of skewback are equipped with marking line, marking line in the side of skewback
Extended line pass through skewback hinge joint.
6. the experimental bench according to claim 1 for integrating physics teaching and student's study, characterized in that the wheel carrier
On traveling wheel be three and to be located on three vertex of triangle.
7. the experimental bench according to claim 1 for integrating physics teaching and student's study, characterized in that first,
The side of the second sliding shoe is equipped with ball, and the ball is contacted with the inner wall of the first, second experiment track.
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| CN107807401B (en) * | 2017-10-25 | 2024-03-29 | 同方威视技术股份有限公司 | Mounting platform and security inspection equipment |
| CN109036018A (en) * | 2018-09-12 | 2018-12-18 | 郑云天 | A kind of physical mechanics apparatus for demonstrating |
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| CN101963782A (en) * | 2009-07-23 | 2011-02-02 | 精工电子有限公司 | Chronograph timepiece |
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| CN2363334Y (en) * | 1999-02-08 | 2000-02-09 | 管祖美 | Speed measurer |
| CN101963782A (en) * | 2009-07-23 | 2011-02-02 | 精工电子有限公司 | Chronograph timepiece |
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Effective date of registration: 20190614 Address after: 325000 Wenzhou Economic and Technological Development Zone, Zhejiang Province, 120 Kuocangdong Road Applicant after: WENZHOU XIANDA EDUCATION INSTRUMENT LIMITED COMPANY Address before: 276000 Jinwan, the World Hui, at the junction of Beijing Road and Binhe West Road, Lanshan District, Linyi City, Shandong Province Applicant before: Wang Guofeng |