CN211121856U - Three-line pendulum period measuring device - Google Patents
Three-line pendulum period measuring device Download PDFInfo
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- CN211121856U CN211121856U CN201921560519.XU CN201921560519U CN211121856U CN 211121856 U CN211121856 U CN 211121856U CN 201921560519 U CN201921560519 U CN 201921560519U CN 211121856 U CN211121856 U CN 211121856U
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Abstract
The utility model discloses a three-wire pendulum period measurement device, including three-wire pendulum, hall component group, pulse shaping circuit and controller, wherein, the three-wire is put and is provided with magnet, the three-wire pendulum drives reciprocating motion is to magnet, hall component group includes first hall element and second hall element, first hall element and second hall element are in three-wire pendulum effect down output pulse signal, pulse shaping circuit connection hall component group, the controller is connected pulse shaping circuit receives the pulse signal of pulse shaping circuit transmission is exported and is shown for the mode module. Through the phase difference of comparing two hall element output signal, can learn that three-wire pendulum motion number of times has the hourglass to survey, thereby improve the utility model discloses the rate of accuracy of test.
Description
Technical Field
The utility model relates to a periodic measurement field, concretely relates to three-way pendulum periodic measurement device.
Background
When an object is researched to do reciprocating motion (such as a simple pendulum, a three-line pendulum and the like), the method for accurately measuring the motion period of the object is a key step, in the prior art, the three-line pendulum does periodic motion, and a photoelectric gate measurement period is adopted, but the photoelectric gate instrument in the current market is complex to adjust, and the problem of measurement leakage is easily caused due to improper adjustment, so that the measurement accuracy is not high.
SUMMERY OF THE UTILITY MODEL
The invention provides a three-wire pendulum period measuring device for solving the problem of low measurement accuracy of a period measuring instrument in the prior art, and the device can improve the period measurement accuracy of a periodically moving object.
A three-wire pendulum cycle measuring device comprising:
The three-wire pendulum is provided with a magnet and drives the magnet to do reciprocating motion;
The Hall element group comprises a first Hall element and a second Hall element, and the first Hall element and the second Hall element output pulse signals under the action of the three-wire pendulum;
A pulse shaping circuit connected to the group of hall elements;
And the controller is connected with the pulse shaping circuit, receives the pulse signal transmitted by the pulse shaping circuit and outputs the pulse signal to the mode module for display.
Further, in a static state, the magnet is opposite to the midpoint position of the distance between the first Hall element and the second Hall element.
Further, the vertical distance between the Hall element group and the three-line pendulum is 3-5 mm.
Further, the three-line pendulum cycle measuring device also comprises a communication interface, and the communication interface is connected with the controller.
Further, the pulse shaping circuit comprises a Schmitt trigger, and the Schmitt trigger adopts an integrated chip.
Further, the output ends of the first hall element and the second hall element are respectively connected with two input ends of the integrated chip, and the first output end and the second output end of the integrated chip are respectively connected with the input end of the controller.
Further, the three-line pendulum period measuring device also comprises a keyboard, and the keyboard is connected with the controller.
Further, the hall element group is of model 31144A.
Further, the communication interface adopts an RS232 interface.
Compared with the prior art, the beneficial effects of the utility model are that:
The utility model discloses be provided with hall element group, this hall element group includes first hall element and second hall element, and the three-line is put and is provided with magnet, and the three-line pendulum drives magnet when rotary reciprocating motion, and every three-line pendulum is through hall element group, and hall element group is just signals, obtains pulse signal after enlargiing the plastic, shows first hall element and second hall element's output waveform at display module, the utility model discloses a two hall element acquisition signal, through two pulse signal's phase difference relatively, can judge whether the periodic measurement is accurate, solved prior art well cycle measurement unsafe problem, consequently the utility model discloses can effectively improve the cycle measurement rate of accuracy.
Drawings
Fig. 1 is a schematic block diagram of a three-line pendulum period measuring apparatus provided in an embodiment of the present invention;
Fig. 2 is an output waveform of the hall element set when the three-line pendulum provided by the embodiment of the present invention moves clockwise;
Fig. 3 is an output waveform of the hall element set when the three-wire pendulum moves counterclockwise according to an embodiment of the present invention.
Fig. 4 is a circuit diagram of a pulse shaping circuit according to an embodiment of the present invention;
Fig. 5 is a circuit diagram of a controller according to an embodiment of the present invention;
Fig. 6 is a circuit diagram of a display module according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 shows a schematic block diagram of a three-wire pendulum period measuring device provided in this embodiment, the three-wire pendulum period measuring device provided in this embodiment includes a three-wire pendulum, a hall element group, a pulse shaping circuit, a controller, and a display module, wherein a magnet is disposed on the three-wire pendulum, the three-wire pendulum drives the magnet to reciprocate, the hall element group includes a first hall element a and a second hall element B, the first hall element a and the second hall element B output a pulse signal under the action of the three-wire pendulum, the pulse shaping circuit is connected to the hall element group, the controller is connected to the pulse shaping circuit, and the pulse signal transmitted by the pulse shaping circuit is received and output to the display module for display. Through the phase difference of comparing two hall element output signal, can judge whether the periodic measurement is accurate, solved prior art well periodic measurement unsafe problem, consequently the utility model discloses can effectively improve the periodic measurement rate of accuracy.
As a specific example of the three-wire pendulum in this embodiment, as shown in fig. 1, the three-wire pendulum provided in this embodiment includes an upper disc and a lower disc, a magnet is disposed on the lower disc, the upper disc supports the lower disc through three wires, and the three-wire pendulum drives the magnet to perform a rotary reciprocating motion when performing the rotary reciprocating motion.
Further, in the static state of the three-display pendulum, the magnet is over against the midpoint position of the distance between the first Hall element A and the second Hall element B, and the vertical distance between the Hall element group and the three-line pendulum is 3-5 mm.
As a specific embodiment of the hall element group in this embodiment, as shown in fig. 1 and 4, the hall element group provided in this embodiment has a model 3144A, which includes two hall elements, that is, a first hall element a and a second hall element B, when the three-wire pendulum rotates and reciprocates, the magnet passes through the hall element group, so that the hall element group generates a hall electromotive force, and a schmidt trigger processes an output signal of the hall element group to obtain a pulse period model, specifically, the pulse period signal generating process is as follows:
When the three-wire pendulum swings clockwise, the magnet firstly passes through the first Hall element A and then passes through the second Hall element B, the waveform of the output signal of the Hall element group is shown in figure 2, and the output signal of the first Hall element A leads the output signal of the second Hall element B;
When the three-wire pendulum swings anticlockwise, the magnet firstly passes through the second Hall element B and then passes through the first Hall element A, the waveform of the output signal of the Hall element group is shown in figure 3, and the output signal of the second Hall element B leads the output signal of the first Hall element A.
Because the three-wire pendulum rotates and reciprocates, if the condition of missing measurement does not exist, the pulse signals generated by the first Hall element A and the second Hall element B alternately lead, and if the same output signal continuously leads, the condition of missing measurement exists.
According to the utility model discloses an embodiment, as shown in fig. 4, the pulse shaping circuit includes schmitt trigger, this embodiment schmitt trigger adopts integrated chip CD40106, specifically, integrated chip's 1 foot is connected to first Hall element A's output, integrated chip's 3 feet are connected to second Hall element B's output, integrated chip's 2 feet and 5 feet are connection control's input respectively, integrated chip carries out the plastic to first Hall element A and second Hall element B's output signal, make it become pulse cycle signal, and give the controller with this pulse cycle signal transmission.
It should be noted that the pulse shaping circuit provided in this embodiment may also adopt other circuits, and meanwhile, this embodiment may also include a method circuit to amplify the pulse period, so as to facilitate the display of the display module.
According to an embodiment of the present invention, as shown in fig. 5, the controller in this embodiment uses STC8A8K64S4a12, and the controller outputs the pulse period signal to the display module for displaying. Of course, the controller in this embodiment may also select other models, which is not limited to this.
Specifically, as shown in fig. 6, the display module in this embodiment includes a liquid crystal display, and an input end of the liquid crystal display is connected to an output end of the controller, so as to display pulse periodic signals of the two hall elements, and facilitate a person to check whether the number of times of the three-wire pendulum movement has a missing problem.
Further, this embodiment still includes communication interface, and communication interface connects the controller, and this communication interface can external storage device, and the controller is exported the pulse cycle signal of receiving to the storage setting.
Specifically, the communication interface adopts an RS232 interface.
Further, the embodiment further comprises a keyboard, wherein the keyboard adopts a 4 × 4 matrix keyboard, the keyboard is connected with the controller, and the periodic signal stored in the storage device can be called through the keyboard, so that whether the test is missed or inaccurate before the checking is convenient.
To sum up, the utility model provides a three-wire pendulum period measurement device prevents magnet through directly over two hall element interval midpoints, and this magnet is placed in three-wire pendulum, drives the magnet motion when three-wire pendulum rotation period motion to two hall element produce hall electromotive force in proper order, and two hall element's output signal forms pulse period signal after handling, compares through the phase difference to pulse period signal, can learn whether three-wire pendulum motion number of times has the hourglass to survey.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A three-wire pendulum cycle measuring device, comprising:
The three-wire pendulum is provided with a magnet and drives the magnet to do reciprocating motion;
The Hall element group comprises a first Hall element and a second Hall element, and the first Hall element and the second Hall element output pulse signals under the action of the three-wire pendulum;
A pulse shaping circuit connected to the group of hall elements;
And the controller is connected with the pulse shaping circuit, receives the pulse signal transmitted by the pulse shaping circuit and outputs the pulse signal to the mode module for display.
2. The three-wire pendulum cycle measuring device of claim 1, wherein the magnet faces a midpoint of a gap between the first hall element and the second hall element in a rest state.
3. The three-wire pendulum cycle measuring device of claim 1, wherein the hall element set is vertically spaced from the three-wire pendulum by 3-5 mm.
4. The three-wire pendulum cycle measurement device of claim 1, further comprising a communication interface, the communication interface coupled to the controller.
5. The three-wire pendulum cycle measurement device of claim 1, wherein the pulse shaping circuit comprises a schmitt trigger, and the schmitt trigger is an integrated chip.
6. The three-wire pendulum cycle measuring device of claim 5, wherein the output terminals of the first and second Hall elements are connected to two input terminals of the integrated chip, respectively, and the first and second output terminals of the integrated chip are connected to the input terminal of the controller, respectively.
7. The three-wire pendulum cycle measurement device of claim 1, further comprising a keyboard coupled to the controller.
8. The three-wire pendulum cycle measuring device of claim 2, wherein the hall element set is model 31144A.
9. The three-wire pendulum cycle measurement device of claim 4, wherein the communication interface is an RS232 interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921560519.XU CN211121856U (en) | 2019-09-19 | 2019-09-19 | Three-line pendulum period measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921560519.XU CN211121856U (en) | 2019-09-19 | 2019-09-19 | Three-line pendulum period measuring device |
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| CN211121856U true CN211121856U (en) | 2020-07-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615160A (en) * | 2020-12-10 | 2021-04-06 | 广州星博信息技术有限公司 | Radio frequency signal phase controller for 5G beam forming |
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2019
- 2019-09-19 CN CN201921560519.XU patent/CN211121856U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615160A (en) * | 2020-12-10 | 2021-04-06 | 广州星博信息技术有限公司 | Radio frequency signal phase controller for 5G beam forming |
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