CN201796525U

CN201796525U - Moving stroboscope

Info

Publication number: CN201796525U
Application number: CN2010205513148U
Authority: CN
Inventors: 赵友明; 金毅
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-21
Filing date: 2010-09-20
Publication date: 2011-04-13
Anticipated expiration: 2020-09-20

Abstract

The utility model discloses a moving stroboscope. The device body has a planar cabinet frame structure; a chute is formed on the left upper corner; luminous scales are arranged on the upper side and the left side respectively; a catapult is slantwise arranged at the left lower corner of the device body; a digital camera is arranged in front of the device body; and a moving body for observation is a cylinder in which a stroboscopic light source capable of converting frequency is arranged. In the moving stroboscope, a moving object carries the light source to actively emit strobe light, the moving process is photographed by the camera, the higher frequency of 50HZ is used by high-speed stroboscope, the lower frequency of 25HZ is used by low-speed stroboscope, the defect of fixed frequency of alternating current is overcome, and stroboscopic pictures are input into a computer to be quantitatively analyzed and high intuitiveness and accuracy can be achieved. The moving stroboscope can be conveniently used for observing various motions of objects, such as free falling motion, horizontal projectile motion, ramp projectile motion and the like, is convenient to use and has high accuracy in the test and a compact structure, low manufacturing cost and is a good teaching aid.

Description

The motion stroboscope

Technical field

The utility model relates to a kind of high school physics teaching aid.

Background technology

The rule of experiments such as the movement of falling object of research object, level throw motion, inclined throw movements, elastic collision process, checking conservation of mechanical energy should be described movement locus of object, obtains related physical quantity again (as g, v ₀Deng).Photo as the stroboscopic photograph of the freely falling body (bead) of the 37th page of Fig. 2-25 in " full-time common senior middle school textbook (the test revised edition is required) " (People's Education Publishing House) first textbook, the level throw motion of the 87th page of Fig. 5-17 and the stroboscopic photograph of the movement of falling object, employing is illuminated moving object (outside sudden strain of a muscle method) with powerful stroboscopic light source under dark room conditions, use digital camera (band B door) shot object motion conditions again; The 191st page of figure is real-10, the motion of the flat paraboloid of research of the even change speed linear motion of research of figure real-11, the 192nd page of figure real-12, the checking law of conservation of momentum of the 193rd page of figure real-13, the 195th page of experiment such as real-15 checking conservation of mechanical energy of figure, adopts trace method or electromagnetic shooting point timer to study the object of which movement situation.But more than there is following problem in experiment: 1) must have powerful stroboscopic light source to illuminate movable body, equipment is complicated and expensive; 2) must just can carry out in the darkroom, the camera of band B door must be arranged, the flushing photograph time is long; 3) be the movable body real image in taking pictures, also need determine the barycenter (geometric center) of each position of real image; 4) adopt trace method described point coarse, accuracy is low, and systematic error is big; 5) dotted timer can only write down rectilinear motion and can't write down the curvilinear motion of measurement; 6) handle with dotted timer, because the natural frequency and the supply frequency of vibrating reed are inequality, factors such as resistance, experimental error is big; 7) can not break away from alternating current because of deciding the restriction of frequency, during the research motion, the little motion with acceleration that acceleration is big all can only be used a kind of frequency of 50HZ; 8) the measured experiment of dotted timer has solid waste to produce, and consumes big.9) with the point on the rule measurement paper tape, DATA REASONING is many, calculation of complex.

The utility model content

The utility model aims to provide a kind of device of observed objects motion, compact conformation, and low cost of manufacture, multiple motions such as the movement of falling object of may observe object, level throw motion, inclined throw movements, easy to use, experiment is accurately.

A kind of motion stroboscope, the device body is a plane frame structure, the upper left corner is equipped with skewed slot, level and vertical direction are equipped with removable luminous scale, the device body lower left corner is equipped with ejector obliquely, there is digital camera in device body dead ahead, and the movable body that is used to observe is a right cylinder, and stroboscopic light source is arranged in the right cylinder.

Stroboscopic light source in the described right cylinder is a high brightness LED, and circuit board and frequency-changeover switch are arranged in the right cylinder.

Be provided with light emitting diode by constant spacing on the described luminous scale, there is magnet at two ends.

Preferably, the spacing of light emitting diode is 50mm on the described luminous scale.

Described device surface is coated with black cloth.

Described digital camera is connected with computer.

Further, device body bottom connects the thing net.

The utility model carries light source by moving object and initiatively sends strobe light, with its motion process of camera, the fireballing upper frequency 50HZ that uses, the slow-footed lower frequency 25HZ that uses, overcome the fixing defective of ac frequency, stroboscopic photograph typing computer is carried out quantitative test, more directly perceived accurate.Can be used for the multiple motions such as the movement of falling object, level throw motion, inclined throw movements of observed objects easily, easy to use, experiment accurately, compact conformation, low cost of manufacture is good teaching aid.

Description of drawings

Fig. 1 is the structural representation of the utility model observation device body.

Fig. 2 is the front schematic view of object.

Fig. 3 is the structural representation of object shown in Figure 2.

Fig. 4 is luminous scale front schematic view.

Fig. 5 is a luminous scale schematic rear view shown in Figure 4.

Fig. 6 is the stroboscopic circuit diagram.

Fig. 7 plants the stroboscopic circuit diagram for other.

Fig. 8 is the circuit diagram of luminous scale.

Among the figure: the 1-skewed slot, the 2-right cylinder, the luminous mark of 3-is most, the 4-ejector, 5-black cloth, 6-connect the thing net, 7-device body, the luminous scale of 8-, the 9-light emitting diode, 10-ruler, 11-power switch, 12-circuit groove, 13-magnet, 21-front panel, 22-light emitting diode, the 23-power switch, 24-frequency-changeover switch, 25-housing, the 26-rear panel, 27-circuit board, 28-battery.

Embodiment

As shown in Figure 1, the utility model is a plane frame structure, the upper left corner of device body 7 is equipped with skewed slot 1, the top and the left side of device body 7 respectively are equipped with luminous scale 3 of removable level and vertical light-emitting scale 8, device body 7 lower left corners are equipped with ejector 4 obliquely, device body 7 surface coverage have black cloth 5, and the below connects thing net 6.There is digital camera in device body 7 dead aheads, the movable body that is used to observe is a right cylinder 2, and digital camera can be placed on the A-frame, also can be placed on the worktable, digital camera can be linked to each other with computer, after computer program is handled, watch the movement locus of right cylinder 2 on computers.

Right cylinder 2 can roll on skewed slot 1, and also available ejector 4 is launched obliquely.Shown in Fig. 2,3, in the right cylinder 2 stroboscopic light source is arranged, stroboscopic light source is a high brightness LED 22, light emitting diode 22 is installed in the housing 25 of state's right cylinder 2, also have circuit board 27, battery 28, power switch 23, frequency-changeover switch 24 and front panel 21, rear panel 26 in the housing 25, the stroboscopic frequency of light emitting diode 9 is changed between 25HZ and 50HZ by frequency-changeover switch 24.

Fig. 4,5 shows the structure of removable

luminous scale

3,8, ruler 10 built-in circuit grooves 12, there is magnet 13 at two ends, light emitting diode 9 is installed in the ruler 10 by constant spacing, and power switch 11 is arranged on the luminous scale, and is preferred, the spacing of light emitting diode 9 is 50mm, light emitting diode 9 is red, and

luminous scale

3,8 can move to the optional position on the device body 7 easily, carries out level and vertical centering with level meter and weight line.

Fig. 6 is the stroboscopic circuit diagram of 25HZ and 50HZ, and it is the core forming circuit by integrated package LM3909, and to the capacitor C charging, then to the LED discharge, thereby glisten by driving LED under the control of switch S 1 for power supply; Resistance R 1 and R2 control flashing rate are respectively 25HZ and 50HZ, realize conversion by frequency-changeover switch S2, and R1 is the stroboscopic of 2.1K decision 50HZ, and R2 is the stroboscopic of 7.9K decision 50HZ; Tantalum electrochemical capacitor C then controls flash time, and capacity is 47 μ F, 25V; With doing power supply after two CR2016 type lithium battery series connection, voltage is 6V in the circuit, and this cell diameter is the not enough 2mm of 20mm thickness, and volume is little; The stroboscopic circuit of such 25HZ and 50HZ has just guaranteed the stability of flashing rate, and dutycycle is certain, no conditions of streaking.Fig. 7 is another stroboscopic circuit diagram, and T1, T2 are SC9011 among the figure, and T3 is SC9012, and T4 is D8050, R1=R4=2.7K Ω, R3=R4=33K Ω, R5=10K Ω, R6=680 Ω; C1=C2=220PF, C3=100 μ F, L are that φ=0.15mm enameled wire is at 315mm ²On the annular ferrite core skeleton around about 200 circles, about 3 Ω of direct current resistance, the about 200mh of inductance value; W1, W2, W3 are the adjustable resistances of 10K Ω, 20K Ω, 30K Ω.

Fig. 8 is the circuit diagram of luminous scale, it is a power supply by a CR2016 lithium battery, a switch, more than ten red light emitting diodes pressed the spacing setting of 50mm, the about 10mA of electric current, as the actual graduated scale of digital photo, realize that the physical size of digital photo and the scale-up factor between micro computer calculate.

Claims

1. motion stroboscope, it is characterized in that: device body (7) is plane frame structure, the upper left corner is equipped with skewed slot (1), level and vertical direction are equipped with removable luminous scale (3,8), device body (7) lower left corner is equipped with ejector (4) obliquely, device body (7) dead ahead is provided with digital camera, and the movable body that is used to observe is right cylinder (2), and stroboscopic light source (22) is arranged in the right cylinder (2).

2. motion stroboscope according to claim 1 is characterized in that: the stroboscopic light source (22) in the described right cylinder (2) is a high brightness LED, and circuit board (27) and frequency-changeover switch (24) are arranged in the right cylinder (2).

3. motion stroboscope according to claim 1 is characterized in that: described luminous scale (3,8) is gone up and is provided with light emitting diode (9) by constant spacing, and there is magnet (13) at luminous scale (3,8) two ends.

4. motion stroboscope according to claim 3 is characterized in that: the spacing of described light emitting diode (9) is 50mm.

5. motion stroboscope according to claim 1 is characterized in that: described device body (7) surface coverage has black cloth (5).

6. motion stroboscope according to claim 1 is characterized in that: described digital camera is connected with computer.

7. motion stroboscope according to claim 1 is characterized in that: described device body (7) bottom connects thing net (6).