CN209993201U - Doppler effect experimental device - Google Patents
Doppler effect experimental device Download PDFInfo
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- CN209993201U CN209993201U CN201920568845.9U CN201920568845U CN209993201U CN 209993201 U CN209993201 U CN 209993201U CN 201920568845 U CN201920568845 U CN 201920568845U CN 209993201 U CN209993201 U CN 209993201U
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- doppler effect
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- moving platform
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Abstract
The utility model discloses a Doppler effect experimental apparatus relates to physics experimental apparatus field, the on-line screen storage device comprises a base, be provided with a pair of support on the base, still include a pair of parallel arrangement's of rotation setting on the support lead screw, still include moving platform, moving platform's both ends are provided with a pair of nut, the last fixed receiver mounting bracket that is provided with of moving platform, the fixed ultrasonic transmitter that is provided with on one of a pair of support, the fixed infrared transmitter that is provided with on another of a pair of support, be provided with ultrasonic receiver and infrared receiver on the receiver mounting bracket respectively, still be provided with the photoelectric door of the speed of surveying receiver mounting bracket on the base, still include control box and power device, power device can drive a pair of lead screw synchronous. The utility model discloses moving platform's motion is steady, can not produce the tremble, and the experiment precision is high, and the experiment content is abundant, is convenient for analyze and conclude doppler effect's characteristics.
Description
Technical Field
The utility model relates to a physics experimental apparatus field especially relates to a Doppler effect experimental apparatus.
Background
The doppler effect was discovered by german mathematicians in 1842, and is now widely used in scientific research, engineering, traffic management, and medical diagnosis. Doppler effect is an important content in college physical teaching, Chinese patent application file CN104952327A, a Doppler effect comprehensive experiment instrument is disclosed, including the guide rail, the one end of guide rail is equipped with infrared receiving bracket component, the other end is equipped with horizontal sensing generator, be equipped with horizontal pulley adjacent with horizontal sensing generator, be equipped with the dolly on the guide rail between infrared receiving bracket component and the horizontal sensing generator, the one end of dolly is close to infrared receiving bracket component and is equipped with and fills electric pile, the other end of dolly is close to horizontal sensing generator and is equipped with the dog bracket component, wherein be equipped with the transmission band on horizontal pulley, the one end of transmission band is passed the dog bracket component and is linked to each other with the dolly, the other end of transmission band links to. However, in the Doppler effect experimental device, the moving trolley is driven by the transmission belt to move on the guide rail under the action of gravity of the weight, the trolley is unstable in movement and easy to tremble, the experimental precision is low, the movement speed of the trolley is not adjustable due to the gravity drive of the weight, the experimental variable is single, the speed of the trolley is not constant, the received frequency signal is not constant, and the Doppler effect is not convenient to analyze and explain.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the purpose is exactly in order to compensate the defect that prior art exists, provides a Doppler effect experimental apparatus, and the easy tremor that takes place of dolly motion instability that solves current Doppler effect experimental apparatus existence leads to measurement accuracy low, and dolly velocity of motion is unadjustable moreover, the single problem of experimental variable.
The utility model discloses technical scheme as follows: the utility model provides a Doppler effect experimental apparatus, includes the base, be provided with a pair of spaced apart and just right support on the base which characterized in that: the device comprises a pair of supports, a pair of screws and a moving platform, wherein one ends of the pair of screws are rotatably arranged on one of the pair of supports, the other ends of the pair of screws are rotatably arranged on the other of the pair of supports, a pair of nuts are arranged at two ends of the moving platform, the pair of nuts are arranged on the pair of screws in a matching manner, the moving platform is fixedly provided with a receiver mounting frame, one of the pair of supports is fixedly provided with an ultrasonic transmitter, the other of the pair of supports is fixedly provided with an infrared transmitter, the receiver mounting frame is respectively provided with an ultrasonic receiver right opposite to the ultrasonic transmitter and an infrared receiver right opposite to the infrared transmitter, the base is also provided with a photoelectric door for detecting the speed of the receiver mounting frame, and the device also comprises a control box, the control box is electrically connected with the ultrasonic transmitter, the infrared transmitter, the ultrasonic receiver, the infrared receiver and the photoelectric door through signal wires, and the control box further comprises a power device which can drive the pair of screw rods to synchronously rotate.
Further, the power device comprises a rotating motor, the rotating motor is connected with one of the pair of screw rods, and a synchronous transmission mechanism is arranged between the pair of screw rods.
Further, the rotating motor is electrically connected with the control box through a signal wire.
Furthermore, one end or the other end of the pair of screw rods penetrates out of the support, and one screw rod of the pair of screw rods penetrates out of the end part of the support and is connected with a rotating shaft of the rotating motor.
Furthermore, one screw rod of the pair of screw rods penetrates out of the end part of the support and is connected with a rotating shaft of the rotating motor through a coupler.
Further, synchronous drive mechanism includes first gear, second gear and third gear, the transmission radius of first gear and second gear is the same, first gear sets up one lead screw in a pair of lead screw is worn out on the tip of support, the second gear sets up another lead screw in a pair of lead screw is worn out on the tip of support, the third gear sets up between first gear and the second gear and with first gear and second gear transmission cooperation, the fixed gear mounting bracket that is provided with on the base, the rotatable setting of the pivot of third gear is in on the gear mounting bracket.
Further, one end of the pair of screw rods is rotatably arranged on one of the pair of supports through a bearing, the other end of the pair of screw rods is rotatably arranged on the other one of the pair of supports through a bearing, and a rotating shaft of the third gear is rotatably arranged on the gear mounting rack through a bearing.
Further, the end parts of the two ends of the pair of screw rods, which are located between the pair of brackets, are provided with buffer parts.
Further, the buffer piece is a buffer spring.
Further, the control box includes a display window.
The beneficial effects of the utility model reside in that: (1) the moving platform serving as the moving structure of the Doppler effect experiment device is driven by the pair of screw rods through the matched screw rod nut device, the moving platform is stable in movement, vibration cannot be generated, and the experiment precision is high. (2) The moving platform adopts a rotating motor as a power source, the moving speed of the moving platform can be adjusted by adjusting the rotating speed of the rotating motor, the Doppler effect under different moving speeds can be measured, and the experiment content is rich; and the speed of the mobile platform can be adjusted to be constant, so that the received frequency signal is constant, and the characteristics of Doppler effect can be analyzed and summarized conveniently.
Drawings
Fig. 1 is a schematic structural diagram of the doppler effect experimental apparatus of the present invention.
Fig. 2 is a partial structure of a top view of the doppler effect experimental apparatus of the present invention.
Wherein; 1-a base; 2-a scaffold; 3-a screw rod; 4-moving the platform; 5-a receiver mounting frame; 6-ultrasonic wave emitter; 7-an infrared emitter; 8-an ultrasonic receiver; 9-an infrared receiver; 10-a photogate; 11-a control box; 12-a rotating electric machine; 13-a coupler; 14-a buffer; 15-a nut; 16-a rotating shaft; 17-a first gear; 18-a second gear; 19-a third gear; 20-gear mounting.
Detailed Description
The following provides a brief description of the embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1-2, a doppler effect experimental device comprises a base 1, wherein a pair of spaced and opposite supports 2 are arranged on the base 1. The device further comprises a pair of parallel screw rods 3, one end of each screw rod 3 is rotatably arranged on one of the pair of brackets 2, and the other end of each screw rod 3 is rotatably arranged on the other of the pair of brackets 2. The screw rod mechanism is characterized by further comprising a moving platform 4, wherein a pair of nuts 15 are arranged at two ends of the moving platform 4, and the pair of nuts 15 are arranged on the pair of screw rods 3 in a matched mode. The fixed receiver mounting bracket 5 that is provided with on moving platform 4, the fixed ultrasonic transmitter 6 that is provided with on one of a pair of support 2, the fixed infrared transmitter 7 that is provided with on another of a pair of support 2, be provided with respectively on the receiver mounting bracket 5 with ultrasonic transmitter 6 just right ultrasonic receiver 8 and with infrared transmitter 7 just right infrared receiver 9, a pair of ultrasonic transmitter 6 and ultrasonic receiver 8, infrared transmitter 7 and infrared receiver 9 can realize the experiment of two kinds of motion modes in opposite directions and back of the body mutually between motion target and the receiver. The base 1 is also provided with a photoelectric door for detecting the speed of the receiver mounting frame 5. The device is characterized by further comprising a control box 11, wherein the control box 11 is electrically connected with the ultrasonic transmitter 6, the infrared transmitter 7, the ultrasonic receiver 8, the infrared receiver 9 and the photoelectric door 10 through signal lines, the control box 11 is used for controlling the ultrasonic transmitter 6 and the infrared transmitter 7 to transmit wave signals with certain frequency, receiving the frequency signals detected by the ultrasonic receiver 8 and the infrared receiver 9, and controlling the movement speed of the photoelectric door 10 in working detection of the receiver mounting frame 5, namely the movement speed of the moving platform 4. The device further comprises a power device, and the power device can drive the pair of screw rods 3 to synchronously rotate.
The working principle of the Doppler effect experimental device is as follows: in the experiment, the power device is controlled to drive the pair of screw rods 3 to synchronously rotate, so that the moving platform 4 is driven to linearly move at a certain speed through the pair of nuts 15, the control box 11 controls the ultrasonic transmitter 6 or the infrared transmitter 7 to transmit wave signals with a certain frequency, the movement speed of the photoelectric door 10 working detection receiver mounting frame 5, namely the movement speed of the moving platform 4, is controlled, and the ultrasonic receiver 8 or the infrared receiver 9 and the photoelectric door 10 feed detected signals back to the control box 11. By adjusting the driving speed of the power device and the transmitting frequency of the ultrasonic transmitter 6 or the infrared transmitter 7, the receiving frequencies corresponding to the movement speeds of different mobile platforms 4 under the same transmitting frequency can be obtained; and receiving frequencies corresponding to different transmitting frequencies under the same moving speed of the mobile platform 4. Among the above-mentioned Doppler effect experimental apparatus, the moving platform who utilizes the complex screw-nut device to be driven by a pair of lead screw as the motion structure, moving platform's motion is steady, can not produce tremble, and the experiment precision is high.
The driving and transmission structure of the pair of lead screws 3 is optionally, but not limited to, the following structure: the power device comprises a rotating motor 12, the rotating motor 12 is electrically connected with the control box 11 through a signal wire, and the control box 11 can control the rotating motor 12 to rotate forwards or backwards at a certain speed. One end or the other end of the pair of screw rods 3 penetrates out of the support 2, one screw rod of the pair of screw rods 3 penetrates out of the end part of the support 2 and is connected with a rotating shaft of the rotating motor 12 through a coupler 13, and a synchronous transmission mechanism is arranged between the pair of screw rods 3. The synchronous transmission mechanism comprises a first gear 17, a second gear 18 and a third gear 19, the transmission radius of the first gear 17 is the same as that of the second gear 18, the first gear 17 is arranged on the end portion of the support 2 where one of the pair of screw rods 3 penetrates out, the second gear 18 is arranged on the end portion of the support 2 where the other of the pair of screw rods 3 penetrates out, the third gear 19 is arranged between the first gear 17 and the second gear 18 and is in transmission fit with the first gear 17 and the second gear 18, a gear mounting rack 20 is fixedly arranged on the base 1, and a rotating shaft 16 of the third gear 19 is rotatably arranged on the gear mounting rack 20.
The above-described drive and transmission structure has the following advantages: the moving platform 4 adopts the rotating motor 12 as a power source, the moving speed of the moving platform 4 can be adjusted by adjusting the rotating speed of the rotating motor 12, the Doppler effect under different moving speeds can be measured, and the experiment content is rich; and the speed of the mobile platform 4 can be regulated to be constant, so that the received frequency signal is constant, and the characteristics of the Doppler effect are conveniently analyzed and summarized.
In order to reduce the rotational friction in the device, one end of the pair of screw rods 3 is rotatably arranged on one of the pair of brackets 2 through a bearing, the other end of the pair of screw rods 3 is rotatably arranged on the other of the pair of brackets 2 through a bearing, and the rotating shaft 16 of the third gear 19 is rotatably arranged on the gear mounting bracket 20 through a bearing.
The buffer parts 14 are arranged on the end parts of the two ends of the pair of screw rods 3 between the pair of brackets 2, so that the movable platform 4 can be prevented from impacting the brackets 2 in the moving process. The buffer 14 may be a buffer spring, or a buffer block made of an elastic material.
The control box 11 includes a display window, which can display the corresponding relationship between the receiving frequency and the moving speed, and the transmitting frequency.
The present invention is not limited to the above-described specific embodiments, and various modifications and changes are possible. Any modification, equivalent replacement, improvement and the like made to the above embodiments according to the technical spirit of the present invention should be included in the scope of protection of the present invention.
Claims (10)
1. The Doppler effect experimental device comprises a base (1), wherein a pair of spaced and opposite supports (2) are arranged on the base (1), and the Doppler effect experimental device is characterized in that: still include a pair of parallel arrangement's lead screw (3), the rotatable setting of one end of a pair of lead screw (3) is in on one of a pair of support (2), the rotatable setting of the other end of a pair of lead screw (3) is in on another of a pair of support (2), still include moving platform (4), the both ends of moving platform (4) are provided with a pair of nut (15), a pair of nut (15) cooperation sets up on a pair of lead screw (3), fixed receiver mounting bracket (5) that is provided with on moving platform (4), fixed ultrasonic emitter (6) that is provided with on one of a pair of support (2), fixed infrared emitter (7) that is provided with on another of a pair of support (2), be provided with respectively on receiver mounting bracket (5) with ultrasonic emitter (6) just right ultrasonic receiver (8) and with infrared receiver (9) that infrared emitter (7) are just right, the base (1) is further provided with a photoelectric door (10) for detecting the speed of the receiver mounting frame (5), and further comprises a control box (11), wherein the control box (11) is electrically connected with the ultrasonic transmitter (6), the infrared transmitter (7), the ultrasonic receiver (8), the infrared receiver (9) and the photoelectric door (10) through signal wires, and the power device can drive the pair of screw rods (3) to synchronously rotate.
2. The Doppler effect experiment device according to claim 1, wherein the power device comprises a rotating motor (12), the rotating motor (12) is connected with one screw (3) of the pair of screws (3), and a synchronous transmission mechanism is arranged between the pair of screws (3).
3. The Doppler effect testing apparatus according to claim 2, wherein the rotating motor (12) is electrically connected to the control box (11) through a signal line.
4. The Doppler effect experiment device according to claim 3, wherein one end or the other end of the pair of lead screws (3) penetrates through the bracket (2), and one end of one lead screw (3) of the pair of lead screws (3) penetrating through the bracket (2) is connected with a rotating shaft of the rotating motor (12).
5. The Doppler effect experiment device according to claim 4, wherein one screw (3) of the pair of screws (3) penetrates through the end of the bracket (2) and is connected with the rotating shaft of the rotating motor (12) through a coupling (13).
6. Doppler effect experiment device according to claim 5, characterized in that the synchronous transmission mechanism comprises a first gear (17), a second gear (18) and a third gear (19), the transmission radiuses of the first gear (17) and the second gear (18) are the same, the first gear (17) is arranged on the end part of one screw rod (3) of the pair of screw rods (3) which penetrates out of the bracket (2), the second gear (18) is arranged on the end part of the other screw rod (3) of the pair of screw rods (3) which penetrates out of the bracket (2), the third gear (19) is arranged between the first gear (17) and the second gear (18) and is in transmission fit with the first gear (17) and the second gear (18), the base (1) is fixedly provided with a gear mounting rack (20), and a rotating shaft of the third gear (19) is rotatably arranged on the gear mounting rack (20).
7. The Doppler effect experiment device according to claim 6, wherein one end of the pair of screw rods (3) is rotatably provided on one of the pair of brackets (2) through a bearing, the other end of the pair of screw rods (3) is rotatably provided on the other of the pair of brackets (2) through a bearing, and the rotating shaft (16) of the third gear (19) is rotatably provided on the gear mounting bracket (20) through a bearing.
8. The Doppler effect test device according to claim 1, wherein a buffer member (14) is provided on an end portion of each of the pair of lead screws (3) between the pair of brackets (2).
9. The Doppler effect experiment device according to claim 8, wherein the buffer member (14) is a buffer spring.
10. The doppler effect experimental apparatus according to claim 1, wherein the control box (11) includes a display window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920568845.9U CN209993201U (en) | 2019-04-24 | 2019-04-24 | Doppler effect experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920568845.9U CN209993201U (en) | 2019-04-24 | 2019-04-24 | Doppler effect experimental device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209993201U true CN209993201U (en) | 2020-01-24 |
Family
ID=69292465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920568845.9U Expired - Fee Related CN209993201U (en) | 2019-04-24 | 2019-04-24 | Doppler effect experimental device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209993201U (en) |
-
2019
- 2019-04-24 CN CN201920568845.9U patent/CN209993201U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20200124 Termination date: 20210424 |