CN202502652U - Wireless centripetal force experimental device - Google Patents
Wireless centripetal force experimental device Download PDFInfo
- Publication number
- CN202502652U CN202502652U CN2012200200254U CN201220020025U CN202502652U CN 202502652 U CN202502652 U CN 202502652U CN 2012200200254 U CN2012200200254 U CN 2012200200254U CN 201220020025 U CN201220020025 U CN 201220020025U CN 202502652 U CN202502652 U CN 202502652U
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- centripetal force
- wireless
- spiral arm
- arm
- strainometer
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Abstract
The utility model provides a wireless centripetal force experimental device comprising a base, an upright post, a bracket and a single chip microcomputer. The upright post is mounted on the base. The bracket is installed on the upright post through a rotary joint. The bracket is provided with a rotating shaft and a rotary arm rotation device. A rotary arm is mounted on the rotating shaft which is connected with the rotary arm rotation device. The rotary arm is provided with a strain gauge, a weight fixing rod and a balancing rod. The bracket is provided with a light barrier arm which is provided with a light barrier piece. The rotary arm also is provided with a force sensing circuit for measuring a centripetal force, a photoelectric gate circuit for measuring light barrier time, and the single chip microcomputer. Both the force sensing circuit and the photoelectric gate circuit are connected with the single chip microcomputer which is connected with a wireless transmitter. According to the utility model, a relation between the centripetal force and a rotation radius under the same mass can be studied, a relation between the centripetal force and the rotation radius under the same rotation radius can be studied, a rotation angle can be changed to study relevant factors of the centripetal force under different rotation angles, and wireless transmission of data is realized at the same time.
Description
Technical field
The utility model relates to a kind of centripetal force tester that quantitative examination centripetal force size and radius of turn size, object quality size, rotational speed concern between big or small that is used for, and belongs to the experimental teaching technical field.
Background technology
To study the relation between centripetal force and radius of turn, object quality and the rotational speed in the centripetal force experiment.At present; The centripetal force tester that various versions are arranged; Like Chinese patent document CN87200733, CN2373853 and CN201004282 disclosed " centripetal force tester "; But these are existing can accomplish quantitative measurment, but can't use sensor to accomplish measurement data, with Modern Electronic equipment (computing machine, projector etc.) can not logotype; Though what have can accomplish experiment through sensor; But centripetal force tester complex structure, install loaded down with trivial detailsly, and adopt the sensor of wired connection, utilize complicated steering link that power is passed to force transducer; Owing to receive the influence of connecting rod quality and gearing friction power; Cause bigger experimental error, and the current experiments device can only study the experiment of on surface level, rotating, experiment condition has received very big restricted.
Summary of the invention
In order to overcome the problem that existing centripetal force tester installation is loaded down with trivial details, experimental error big and be confined to the horizontal direction rotation; The utility model provides a kind of wireless centripetal force tester, and this tester adopts wireless telecommunications, installs simply, can freely change surfaces of revolution angle.
The wireless centripetal force tester of the utility model adopts following technical scheme:
This is wireless centripetal force tester comprises base, column, swivel, the arm that is in the light, spiral arm, strainometer, counterweight fixed bar, trim bar, spiral arm wheelwork, carriage and single-chip microcomputer; Column is installed on the base, and carriage is installed on the column through swivel; Rotating shaft and spiral arm wheelwork are installed on the carriage, and spiral arm is installed in the rotating shaft, and rotating shaft is connected with the spiral arm wheelwork; Strainometer, counterweight fixed bar and trim bar are installed on the spiral arm, and the axis of counterweight fixed bar and trim bar is on same straight line, and an end of counterweight fixed bar and trim bar is connected with the both sides of strainometer respectively; The arm that is in the light is installed on the carriage, and the arm that is in the light is provided with light barrier; Also be provided with the power sensing circuit of measuring centripetal force, photogate and the single-chip microcomputer of measuring the time of being in the light on the spiral arm, the power sensing circuit all is connected with single-chip microcomputer with photogate, is connected with wireless launcher on the single-chip microcomputer.Wireless launcher is connected with wireless receiver through wireless mode, and wireless receiver is connected to computing machine.
The spiral arm wheelwork comprises motor, driving pulley and passive belt wheel, and motor is fixed on the carriage, and driving pulley is installed on the motor shaft, and passive belt wheel is installed in the rotating shaft, is connected with belt between driving pulley and the passive belt wheel.
The power sensing circuit comprises strainometer, power supply fiducial chip U1, operational amplifier U2 and operational amplifier U4, and power supply fiducial chip U1 is connected with strainometer, and strainometer is connected with operational amplifier U2, and operational amplifier U2 is connected with operational amplifier U4.Power supply fiducial chip U1 is that strainometer is supplied power, and the output of strainometer gets into operational amplifier U2 and carries out the signal amplification.Operational amplifier U4 is that U2 provides bias voltage.
Photogate adopts the grooved optoelectronic switch, and this grooved optoelectronic switch is installed in an end of spiral arm.Spiral arm rotates constantly, and the grooved optoelectronic switch rotates thereupon, and when arriving the light barrier position, light barrier is inserted in the grooved optoelectronic switch, measures and is in the light the time, will convert the angular velocity omega of spiral arm the time of being in the light into.
Above-mentioned wireless centripetal force tester; During use counterweight is fixed on the counterweight fixed bar; Can study the relation of centripetal force and radius of turn under the equal in quality through the position that changes counterweight; The quality that changes the same position counterweight can be studied the relation of centripetal force and radius of turn under the identical radius of turn, and it is relevant with which factor to study under the different rotary angle centripetal force through the anglec of rotation of change spiral arm.Gather centripetal force and be in the light time two physical quantity signals through governor circuit; Size with centripetal force after governor circuit is handled is wirelessly transmitted to wireless receiver with time two data that are in the light through wireless launcher; Wireless receiver to computing machine, carries out data processing by the software in the computing machine with data transmission.
The utility model is simple in structure, easy to operate; Reduce to finish the experimental error that is configured to; Not only can study the relation of centripetal force and radius of turn under centripetal force and the relation of radius of turn under the equal in quality, the identical radius of turn; Can also change the related factors of the anglec of rotation, realize the wireless transmission of data simultaneously with centripetal force under the research different rotary angle.
Description of drawings
Fig. 1 is the structural representation of the wireless centripetal force tester of the utility model.
Fig. 2 is the schematic diagram of single chip part in the utility model.
Fig. 3 is the schematic diagram of power circuit in the utility model.
Fig. 4 is the schematic diagram of photogate in the utility model.
Fig. 5 is the schematic diagram of bluetooth radio transmitter in the utility model.
Fig. 6 is the schematic diagram of power sensing circuit in the utility model.
Fig. 7 is the circuit theory diagrams of wireless receiver in the utility model.
Fig. 8 is the curve map of centripetal force and angular velocity under the identical counterweight quality, different radiuses of rotation in the experiment.
Fig. 9 be in the experiment centripetal force and angular velocity square graph of relation.
Figure 10 is a surface chart of choosing the F value in the experiment.
Figure 11 is the graph of relation of centripetal force and radius of turn in the experiment.
Figure 12 is the curve map between centripetal force and the angular velocity under the identical radius of turn, different counterweight quality in the experiment.
Figure 13 is the graph of relation of centripetal force and counterweight quality in the experiment.
Wherein: 1, base, 2, column, 3, the variable-angle adapter, 4, belt pulley, 5, spiral arm; 6, light barrier, 7, the counterweight fixed bar, 8, counterweight, 9, arm is in the light; 10, trim bar, 11, motor, 12, strainometer, 13, rotating shaft; 14, driving pulley, 15, the grooved optoelectronic switch, 16, set nut, 17, carriage.
Embodiment
As shown in Figure 1, the utility model is wireless, and the centripetal force tester mainly comprises base 1, column 2, swivel 3, the arm 9 that is in the light, light barrier 6, spiral arm 5, strainometer 12, counterweight fixed bar 7, counterweight 8, trim bar 10, carriage 17 and spiral arm wheelwork.Column 2 is installed on the base 1; Carriage 17 is installed on the column 2 through swivel 3; Swivel 3 is divided into kinetoplast and quiet body two parts for existing universal component, and kinetoplast and quiet body can relatively rotate; Kinetoplast and quiet body are fixing with column 2 with carriage 17 respectively, make carriage 17 and on spiral arm 5 can change fixed angle.Rotating shaft 13 and spiral arm wheelwork are installed on the carriage 17, and spiral arm 5 is installed in the rotating shaft 13, and rotating shaft 13 is connected with the spiral arm wheelwork.Rotating shaft 13 is rotated under the drive of spiral arm wheelwork, and drive spiral arm 5 rotates together.The spiral arm wheelwork comprises motor 11, driving pulley 14 and passive belt wheel 4; Motor 11 is fixed on the carriage 17; Driving pulley 14 is installed on the motor shaft, and passive belt wheel 4 is installed in the rotating shaft 13, is connected with belt between driving pulley 14 and the passive belt wheel 4; Motor 11 drives spiral arm 5 rotations through belt gear, and rotating speed of motor is adjustable.After taking belt, can manually stir spiral arm 5, it is freely rotated.The spiral arm wheelwork also can adopt other gear trains such as chain transmission, gear drive.Strainometer 12, counterweight fixed bar 7 and trim bar 10 are installed on the spiral arm 5; The axis of counterweight fixed bar 7 and trim bar 10 is on same straight line; One end of counterweight fixed bar 7 and trim bar 10 is connected with the both sides of strainometer 12 respectively, and the other end inserts in the aperture of spiral arm 5 one sides, is free state.Counterweight 8 is fixed on the counterweight fixed bar 7 through clamping screw.The effect of trim bar 10 is and 7 trims of counterweight fixed bar, with counterweight fixed bar 7 homogeneities.The arm 9 that is in the light is installed on the carriage 17, on the arm 9 that is in the light light barrier 6 is arranged, the arm 9 that is in the light is fixed on carriage 17 through set nut 16.One end of spiral arm 5 is equipped with grooved optoelectronic switch 15, and spiral arm 5 will be blocked by light barrier 6 when rotating, and will convert the angular velocity omega of spiral arm 5 time of being in the light into.
Also be provided with the power sensing circuit of measuring centripetal force and the photogate (being grooved optoelectronic switch 15) of measuring the time of being in the light on the spiral arm 5; The power sensing circuit all is connected with single-chip microcomputer with photogate; Be connected with wireless launcher on the single-chip microcomputer; Wireless launcher be connected wireless receiver through wireless mode, wireless receiver is connected to computing machine through the USB mouth, wireless launcher adopts bluetooth module.Gather centripetal force and be in the light time two physical quantity signals through single-chip microcomputer; Size with centripetal force after single-chip microcomputer is handled is wirelessly transmitted to wireless receiver with time two data that are in the light through wireless launcher; Wireless receiver through the USB mouth with data transmission to computing machine, carry out data processing by the software in the computing machine.Wireless launcher and wireless receiver adopt Bluetooth technology.
Fig. 2 has provided the schematic diagram of single chip part, and U3 is single-chip microcomputer C8051F410, power sensing circuit output signal get into U3 by 29 pin of U1,16 inner pin of U3 are that the ADC module is sampled to voltage, and simulating signal is converted into digital signal.The output signal of photogate gets into U3 through 15 pin of U3, and the timer pulse signals of U3 is carried out timing.U6 is ADR391, and for the ADC module of U3 inside provides 2.5V power supply benchmark, U3 controls the output of U6 through the conducting of P1.7 control Q1 triode 8050.R18, R19 carry out dividing potential drop to cell voltage, by the 36 pin entering U3 of U3, are detected the electric weight of battery by U3.D3 is a relay indicating light, and when circuit working, D3 lights, when battery electric quantity is not enough, and the D3 flicker.J2 is the program download interface of U3.XT1 is the crystal oscillator of 22.1184M.
Fig. 3 has provided the schematic diagram of power circuit, and U7 is a TPS61202 Switching Power Supply voltage stabilizing chip, and stable output 5V is the tester power supply.U8 is the XC6219 power supply chip, and output 3.3V is the bluetooth module power supply.J3 is the input socket of battery case.
Fig. 4 has provided the schematic diagram of photogate, adopts J4 (33039A) grooved optoelectronic switch, and the tripod of J4 is an output pin, is connected to 15 pin of U3.
Fig. 5 has provided the schematic diagram of blue teeth wireless radiating circuit, and U5 is a bluetooth module, is connected to 21,22 pin of U3 through 1,2 pin.D2 is the relay indicating light of bluetooth module, when bluetooth module is in the search state, and D2 flicker, when bluetooth module and wireless receiver have connected, D2 Chang Liang.
Fig. 6 has provided the schematic diagram of power sensing circuit, and J1 is a strainometer, and the output of strainometer gets into U2 operational amplifier A D620 and carries out the signal amplification, and the signal after the amplification inputs to the 29th pin of U3 through resistance R 4 from the 6th pin of U2.U1 is power supply fiducial chip REF3040, for the J1 strainometer is supplied power.U4 is operational amplifier MAX4322, and the 3rd pin of U4 is connected to the 18 pin DAC output of U3, and the 4th, 1 pin is connected to the 5th pin of U2, for U2 provides bias voltage.
Fig. 7 has provided the circuit theory diagrams of wireless receiver, and U1 is single-chip microcomputer C8051F340, and J1 is the 8th, 9 pin that USB interface is connected to U1.U2 is a bluetooth module, and S1 matches button automatically.U3 is an XC6219 voltage stabilizing chip, for bluetooth module provides 3.3V power supply.
Software in the computing machine will convert the angular velocity omega of spiral arm 5 time of being in the light into, set up a F-ω coordinate system, and transverse axis is an angular velocity omega, and the longitudinal axis is power F.When spiral arm 5 rotations, when grooved optoelectronic switch 15 passed through light barrier 6, software will be noted this acceleration that is in the light and current centripetal force value, and in coordinate system, draws data point.The utility model not only can be studied the relation of centripetal force and radius of turn under centripetal force and the relation of radius of turn under the equal in quality, the identical radius of turn, and it is relevant with those factors with centripetal force under the research different rotary angle to change the anglec of rotation.
Fig. 8 has provided in the experiment curve of centripetal force and angular velocity under identical counterweight quality, the different radiuses of rotation, can explain that through " quadratic fit " relation of centripetal force and angular velocity is a quafric curve.Fig. 9 provided centripetal force and angular velocity in the experiment square relation curve, through " once fitting ", what centripetal force and angular velocity can be described square is once linear relationship.Figure 10 has provided the interface of " choose F value " in the experiment, with the centripetal force value record of same angular velocity, different radiuses of rotation correspondence in data form.Figure 11 has provided in the experiment value of centripetal force in the form and the value of radius of turn has been set up the drawing that coordinate system carries out, and can explain that under the same angular velocity, centripetal force and radius of turn are directly proportional.Figure 12 has provided in the experiment curve between the centripetal force and angular velocity under identical radius of turn, the different counterweight quality.And " choosing the F value " with the value record of the value of the centripetal force under the same angular velocity and counterweight quality in form.Centripetal force value and the value of counterweight quality that Figure 13 has provided in the experiment are set up the curve of coordinate post-plot, can explain centripetal force under the same angular velocity and quality are being directly proportional.
Claims (4)
1. a wireless centripetal force tester comprises base, column, swivel, the arm that is in the light, spiral arm, strainometer, counterweight fixed bar, trim bar, spiral arm wheelwork, carriage and single-chip microcomputer; It is characterized in that: column is installed on the base, and carriage is installed on the column through swivel; Rotating shaft and spiral arm wheelwork are installed on the carriage, and spiral arm is installed in the rotating shaft, and rotating shaft is connected with the spiral arm wheelwork; Strainometer, counterweight fixed bar and trim bar are installed on the spiral arm, and the axis of counterweight fixed bar and trim bar is on same straight line, and an end of counterweight fixed bar and trim bar is connected with the both sides of strainometer respectively; The arm that is in the light is installed on the carriage, and the arm that is in the light is provided with light barrier; Also be provided with the power sensing circuit of measuring centripetal force, photogate and the single-chip microcomputer of measuring the time of being in the light on the spiral arm, the power sensing circuit all is connected with single-chip microcomputer with photogate, is connected with wireless launcher on the single-chip microcomputer.
2. wireless centripetal force tester according to claim 1; It is characterized in that: said spiral arm wheelwork comprises motor, driving pulley and passive belt wheel; Motor is fixed on the carriage; Driving pulley is installed on the motor shaft, and passive belt wheel is installed in the rotating shaft, is connected with belt between driving pulley and the passive belt wheel.
3. wireless centripetal force tester according to claim 1; It is characterized in that: said power sensing circuit comprises strainometer, power supply fiducial chip U1, operational amplifier U2 and operational amplifier U4; Power supply fiducial chip U1 is connected with strainometer; Strainometer is connected with operational amplifier U2, and operational amplifier U2 is connected with operational amplifier U4.
4. wireless centripetal force tester according to claim 1 is characterized in that: said photogate adopts the grooved optoelectronic switch, and this grooved optoelectronic switch is installed in an end of spiral arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200200254U CN202502652U (en) | 2012-01-17 | 2012-01-17 | Wireless centripetal force experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200200254U CN202502652U (en) | 2012-01-17 | 2012-01-17 | Wireless centripetal force experimental device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202502652U true CN202502652U (en) | 2012-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200200254U Withdrawn - After Issue CN202502652U (en) | 2012-01-17 | 2012-01-17 | Wireless centripetal force experimental device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202502652U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426809A (en) * | 2012-01-17 | 2012-04-25 | 山东省远大网络多媒体股份有限公司 | Wireless centrifugal force tester |
-
2012
- 2012-01-17 CN CN2012200200254U patent/CN202502652U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426809A (en) * | 2012-01-17 | 2012-04-25 | 山东省远大网络多媒体股份有限公司 | Wireless centrifugal force tester |
| CN102426809B (en) * | 2012-01-17 | 2013-11-06 | 山东省远大网络多媒体股份有限公司 | Wireless centrifugal force tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121024 Effective date of abandoning: 20131106 |
|
| RGAV | Abandon patent right to avoid regrant |