CN205910917U - Acceleration of gravity measuring device - Google Patents
Acceleration of gravity measuring device Download PDFInfo
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- CN205910917U CN205910917U CN201620307707.1U CN201620307707U CN205910917U CN 205910917 U CN205910917 U CN 205910917U CN 201620307707 U CN201620307707 U CN 201620307707U CN 205910917 U CN205910917 U CN 205910917U
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Abstract
The utility model discloses an acceleration of gravity measuring device, the device include power, evacuating device, sealing glass container, electro -magnet, little iron ball, " (img file='DSA0000128750360000011. TIF'wi='36'he='83' /) " type slide, optical fiber sensor, distance sensor, reading device, levelling device, simple pendulum, relay, clip, pressure sensor. The utility model discloses an acceleration of gravity measuring device has realized that the experiment of two principles is automatic, measure easy operation in succession, the average value of two kinds of experimental datas, the numerical result is accurate, and the error is little, the student does an experiment and knows two experiment principles, saves student's time.
Description
Technical field
This utility model belongs to a kind of physical measurement field, particularly a kind of measurement of acceleration of gravity.
Background technology
Measurement acceleration of gravity is one of physical experiment course in universities basic experiment, and relatively simple experimental technique has freedom
Constructional Elements Using Falling Methods and single pendulum method, using formula l=gt2/ 2, l=gt2/4π2Obtain the value of acceleration of gravity, above-mentioned formula is used to very
Under dummy status, and the measurement experiment in current physical experiment course in universities is under non-vacuum, and the error of measured value is larger.
In prior art, such as Chinese patent cn104966438a devises a kind of Constructional Elements Using Falling Methods measuring gravity acceleration test instrument,
It is mainly fallen the time under vacuum conditions by photogate, controller sensing bead, but use only a kind of experimental principle measurement, and
The distance between its photogate adopts graduated ruler measurement, and manual measurement error is larger；Chinese patent cn203811820u
Devise a kind of measurement apparatus of acceleration of gravity, this device measures little using laser range sensor and light sensitive diode
The fall time of ball and distance, because experiment is carried out in atmosphere, are affected by air drag in bead dropping process, are led to
The error of measurement data is larger；All use only a kind of experimental principle measurement in above-mentioned prior art, lead in same experiment
In inevitably error exist all the time.
Utility model content
For the problems referred to above, this utility model provides a kind of acceleration of gravity measurement apparatus it is achieved that two kinds of principles
Experiment is automatic, continuous measurement, and the meansigma methodss of two experimental datas can more accurately measure acceleration of gravity, simultaneously so that doing reality
The student that tests understands more principles, simple to operate.
This utility model takes technical scheme below to be attained in that
Acceleration of gravity measurement apparatus include power supply (1), vacuum extractor (2), sealed glass container (3), electric magnet
(4), little iron ball (5), "] " type slideway (6), Fibre Optical Sensor (71), (73), range sensor (72), reading plotter (8), tune
Leveling device (9), single pendulum (10), relay (11), clip (12) pressure transducer (13), described sealed glass container (3) is length
Cube, top surface is removable top；Sealed glass container (3) end face center position is fixedly connected electric magnet (4)；Seal glass holds
Device (3) bottom center position setting pressure transducer (13)；Sealed glass container (3) bottom setting levelling device (9)；Sealing glass
Glass container (3) side (14) is fixedly connected "] " type slideway (6), "] " type slideway (6) (14) on the side vertical center line position,
Length is equal with the height of sealed glass container (3)；"] " type slideway (6) is slidably connected two sensor devices (7), sensor
Device (7) is made up of Fibre Optical Sensor (71), (73) and range sensor (72)；The spy of range sensor (72) above
Head is fixedly connected on the lower section of uppermost sensor device (7)；Fibre Optical Sensor (71), (73) and range sensor (72) and reading
Device (8) electrically connects；Reading plotter (8) includes timing unit and display unit；Sealed glass container (3) top surface is fixedly connected list
Pendulum (10), described single pendulum (10) summit is arranged at the 1/4 of top surface horizontal central line, and pendulum length is sealed glass container (3) height
0.6-0.7 times；With "] " adjacent surface (15) setting slideway (61), slideway (61) and the single pendulum (10) of the side that is connected of type slideway (6)
The plane constituting when vertically static is vertical with described adjacent surface (15)；Slideway (61) is slidably connected clip (12), clip (12) with
Relay (11) electrically connects；Relay (11) is electrically connected with pressure transducer (13)；Reading plotter (8), electric magnet (4), take out true
Empty device (2) is electrically connected with power supply (1)；It is fixing with sealed glass container even that described vacuum extractor (2) passes through suction opeing (21)
Connect, suction opeing (21) is provided with vacuum degree measurement probe and air valve.
Further technical scheme of the present utility model is: the rib of sealed glass container (3) and the center line in six faces all have gold
Belong to frame to support, described metal rack is one or more of brandreth, steelframe.
The measuring method of acceleration of gravity measurement apparatus, comprises the following steps:
Step 1, using levelling device (9) leveling sealed glass container (3), electric magnet (4) is energized, opens seal glass
Container (3) top cover, is placed on absorption at electric magnet little iron ball (5), the bead (51) of single pendulum lower end clamped by clip (12), using little
The gravity of ball (51) stretches the fine rule of single pendulum, covers top cover；
Step 2, using the distance between range sensor (72) measurement of top, two sensor devices (7) of adjustment l,
Make l value for 0.6-0.8 times of sealed glass container (3) height, and fix two sensor devices (7), open vacuum means
Put (2) by sealing container evacuation；
Step 3, disconnects the power supply of electric magnet, measures little iron ball (51) using two Fibre Optical Sensors (71), (73) and falls
During sense in upper end Fibre Optical Sensor (71) through the time of two Fibre Optical Sensors (71), (73), reading plotter (8)
Start timing, the timing when lower end Fibre Optical Sensor (73) senses little iron ball (5) finishes, and record data during little iron ball (5)
Time t；
Step 4, little iron ball (5) falls bottom surface, and pressure transducer (13) senses during pressure transmitting telecommunication number to relay
(11), relay (11) controls clip (12) to unclamp bead (51), and up Fibre Optical Sensor (71) is for the first time for reading plotter (8)
Sense single pendulum (10) and start timing, sense single pendulum (10) timing for the third time and finish, the cycle t of record single pendulum；
Step 5, using formulaWithCalculate mean gravity acceleration g.
The beneficial effects of the utility model are:
1st, the experiment of two principles automatically, continuous measure, simple to operate；
2nd, the meansigma methodss of two kinds of experimental datas are adopted, accurately, error is little for result of calculation；
3rd, student does experiment two experimental principles of understanding, saves student's time；
4th, adopt the single pendulum pendulum length of 0.6-0.7 times of sealed glass container height and 0.6-0.8 times of sensor distance, realize
Two experiments, using common sensor acquisition data, reduce cost.
Brief description
Fig. 1 is gravity acceleration measurement device front elevation；
Fig. 2 is gravity acceleration measurement device side view；
In figure: 1, power supply；2nd, vacuum extractor；21st, suction opeing；3rd, sealed glass container；4th, electric magnet；5th, little iron ball；
51st, bead；6th, "] " type slideway；61st, slideway；7th, sensor device；71st, Fibre Optical Sensor；72nd, range sensor；73rd, optical fiber
Sensor；8th, reading plotter；9th, levelling device；10th, single pendulum；11st, relay；12nd, clip；13rd, pressure transducer；14th, seal
Glass container side；15th, side adjacent surface.
Specific embodiment
1-2, comparative example 1 and embodiment 1-6 illustrate to this utility model below in conjunction with the accompanying drawings.
The experimental result that comparative example 1 and embodiment 1-6 all obtain in Guangxi Zhuang Autonomous Region Nanning City, in embodiment 1-6
The timing unit of reading plotter is Millisecond timing.
Comparative example 1:
Measure acceleration of gravity with single pendulum in atmosphere, using formulaTry to achieve gravity acceleration g, experiment adopts
The fine rule of 1m length, little iron ball with holes, with the iron stand of iron clamp, meter ruler, slide gauge, stopwatch.Survey little iron ball with slide gauge
Diameter d, surveys 3 secondary data and is respectively 1.91,1.90,1.90 centimetres；Tie a knot behind hole fine rule one end being passed through little iron ball, the other end
It is fixed on iron clamp, iron clamp is fixed on brandreth upper end, the single pendulum made is stretched out outside desktop, measure pendulum during suspention with meter ruler
Line length l ' (from suspension point to little iron ball top), surveys 3 secondary data and is respectively 98.10,98.00,98.20 centimetres；Swing ball is pulled away from flat
One section of position of weighing apparatus small distance, cycloid is decontroled after being less than 5 ° with vertical direction angle, allows single pendulum to swing back and forth in a vertical plane,
Measure 30 full time of vibration t (starting timing when swing ball crosses minimum point) of single pendulum with stopwatch, survey 3 secondary data be respectively 59.9,
60.0th, 59.9 seconds；Calculate pendulum length with meansigma methodssCycleThus calculate gravity to add
Speed g=9.806, obtains error 0.18% according to normal acceleration of gravity value g=9.7879 of Nanning City.
Embodiment 1:
Embodiment 1 is gravity acceleration measurement device, including power supply (1), vacuum extractor (2), sealed glass container
(3), electric magnet (4), little iron ball (5), "] " type slideway (6), Fibre Optical Sensor (71), (73), range sensor (72), reading
Device (8), levelling device (9), single pendulum (10), relay (11), clip (12), pressure transducer (13), sealed glass container
(3) it is cuboid, length, width and height are respectively 1 meter, 0.4 meter and 1 meter, for removable top and center is fixedly connected electromagnetism to top surface
Ferrum (4), bottom center position setting pressure transducer (13)；Sealed glass container (3) bottom setting levelling device (9)；Sealing
Glass container (3) side (14) is fixedly connected one "] " type slideway (6), "] " type slideway (6) (14) on the side vertical center line
Position, length is equal with the height of sealed glass container (3)；"] " type slideway (6) is slidably connected two sensor devices (7), passes
Sensor arrangement (7) is made up of Fibre Optical Sensor (71), (73) and range sensor (72)；Range sensor (72) above
Probe be fixedly connected on the lower section of uppermost sensor device (7)；Fibre Optical Sensor (71), (73) and range sensor (72) with
Reading plotter (8) electrically connects；Reading plotter (8) includes timing unit and display unit；Sealed glass container (3) top surface is fixing even
(10) are put in order, and single pendulum (10) summit is arranged at the 1/4 of top surface horizontal central line, and pendulum length is 0.6 meter；With "] " type slideway (6) is even
The side connecing adjacent surface (15) setting slideway (61), the plane constituting when slideway (61) is vertical static with single pendulum (10) with described
Adjacent surface (15) is vertical；Slideway (61) is slidably connected clip (12), and clip (12) is electrically connected with relay (11)；Relay (11)
Electrically connect with pressure transducer (13)；Reading plotter (8), electric magnet (4), vacuum extractor (2) are electrically connected with power supply (1)；Take out
Vacuum equipment (2) is fixedly connected with sealed glass container by suction opeing (21), and suction opeing (21) is provided with vacuum degree measurement probe
And air valve.
Its measuring method comprises the following steps:
Step 1, using levelling device (9) leveling sealed glass container (3), electric magnet (4) is energized, opens seal glass
Container (3) top cover, is placed on absorption at electric magnet little iron ball (5), the bead (51) of single pendulum lower end clamped by clip (12), using little
The gravity of ball (51) stretches the fine rule of single pendulum, covers top cover；
Step 2, using the distance between range sensor (72) measurement of top, two sensor devices (7) of adjustment l,
Make l value be 0.6 meter, and fix two sensor devices (7), open vacuum extractor (2) by sealing container evacuation；
Step 3, disconnects the power supply of electric magnet, measures little iron ball (51) using two Fibre Optical Sensors (71), (73) and falls
During sense in upper end Fibre Optical Sensor (71) through the time of two Fibre Optical Sensors (71), (73), reading plotter (8)
Start timing, the timing when lower end Fibre Optical Sensor (73) senses little iron ball (5) finishes, and record data during little iron ball (5)
Second time t=0.350；
Step 4, little iron ball (5) falls bottom surface, and pressure transducer (13) senses during pressure transmitting telecommunication number to relay
(11), relay (11) controls clip (12) to unclamp bead (51), and up Fibre Optical Sensor (71) is for the first time for reading plotter (8)
Sense single pendulum (10) and start timing, sense single pendulum (10) timing for the third time and finish, the second in cycle t=1.555 of record single pendulum；
Step 5, using formulaCalculate average
Acceleration of gravity
Embodiment 2:
Embodiment 2 is gravity acceleration measurement device, including power supply (1), vacuum extractor (2), sealed glass container
(3), electric magnet (4), little iron ball (5), "] " type slideway (6), Fibre Optical Sensor (71), (73), range sensor (72), reading
Device (8), levelling device (9), single pendulum (10), relay (11), clip (12), pressure transducer (13), sealed glass container
(3) it is cuboid, length, width and height are respectively 1 meter, 0.4 meter and 1 meter, for removable top and center is fixedly connected electromagnetism to top surface
Ferrum (4), bottom center position setting pressure transducer (13)；Sealed glass container (3) bottom setting levelling device (9)；Sealing
Glass container (3) side (14) is fixedly connected one "] " type slideway (6), "] " type slideway (6) (14) on the side vertical center line
Position, length is equal with the height of sealed glass container (3)；"] " type slideway (6) is slidably connected two sensor devices (7), passes
Sensor arrangement (7) is made up of Fibre Optical Sensor (71), (73) and range sensor (72)；Range sensor (72) above
Probe be fixedly connected on the lower section of uppermost sensor device (7)；Fibre Optical Sensor (71), (73) and range sensor (72) with
Reading plotter (8) electrically connects；Reading plotter (8) includes timing unit and display unit；Sealed glass container (3) top surface is fixing even
(10) are put in order, and single pendulum (10) summit is arranged at the 1/4 of top surface horizontal central line, and pendulum length is 0.6 meter；With "] " type slideway (6) is even
The side connecing adjacent surface (15) setting slideway (61), the plane constituting when slideway (61) is vertical static with single pendulum (10) with described
Adjacent surface (15) is vertical；Slideway (61) is slidably connected clip (12), and clip (12) is electrically connected with relay (11)；Relay (11)
Electrically connect with pressure transducer (13)；Reading plotter (8), electric magnet (4), vacuum extractor (2) are electrically connected with power supply (1)；Take out
Vacuum equipment (2) is fixedly connected with sealed glass container by suction opeing (21), and suction opeing (21) is provided with vacuum degree measurement probe
And air valve.
Its measuring method comprises the following steps:
Step 1, using levelling device (9) leveling sealed glass container (3), electric magnet (4) is energized, opens seal glass
Container (3) top cover, is placed on absorption at electric magnet little iron ball (5), the bead (51) of single pendulum lower end clamped by clip (12), using little
The gravity of ball (51) stretches the fine rule of single pendulum, covers top cover；
Step 2, using the distance between range sensor (72) measurement of top, two sensor devices (7) of adjustment l,
Make l value be 0.7 meter, and fix two sensor devices (7), open vacuum extractor (2) by sealing container evacuation；
Step 3, disconnects the power supply of electric magnet, measures little iron ball (51) using two Fibre Optical Sensors (71), (73) and falls
During sense in upper end Fibre Optical Sensor (71) through the time of two Fibre Optical Sensors (71), (73), reading plotter (8)
Start timing, the timing when lower end Fibre Optical Sensor (73) senses little iron ball (5) finishes, and record data during little iron ball (5)
Second time t=0.378；
Step 4, little iron ball (5) falls bottom surface, and pressure transducer (13) senses during pressure transmitting telecommunication number to relay
(11), relay (11) controls clip (12) to unclamp bead (51), and up Fibre Optical Sensor (71) is for the first time for reading plotter (8)
Sense single pendulum (10) and start timing, sense single pendulum (10) timing for the third time and finish, the second in cycle t=1.555 of record single pendulum；
Step 5, using formulaCalculate average
Acceleration of gravity
Embodiment 3
Embodiment 3 is gravity acceleration measurement device, including power supply (1), vacuum extractor (2), sealed glass container
(3), electric magnet (4), little iron ball (5), "] " type slideway (6), Fibre Optical Sensor (71), (73), range sensor (72), reading
Device (8), levelling device (9), single pendulum (10), relay (11), clip (12), pressure transducer (13), sealed glass container
(3) it is cuboid, length, width and height are respectively 1 meter, 0.4 meter and 1 meter, for removable top and center is fixedly connected electromagnetism to top surface
Ferrum (4), bottom center position setting pressure transducer (13)；Sealed glass container (3) bottom setting levelling device (9)；Sealing
Glass container (3) side (14) is fixedly connected one "] " type slideway (6), "] " type slideway (6) (14) on the side vertical center line
Position, length is equal with the height of sealed glass container (3)；"] " type slideway (6) is slidably connected two sensor devices (7), passes
Sensor arrangement (7) is made up of Fibre Optical Sensor (71), (73) and range sensor (72)；Range sensor (72) above
Probe be fixedly connected on the lower section of uppermost sensor device (7)；Fibre Optical Sensor (71), (73) and range sensor (72) with
Reading plotter (8) electrically connects；Reading plotter (8) includes timing unit and display unit；Sealed glass container (3) top surface is fixing even
(10) are put in order, and single pendulum (10) summit is arranged at the 1/4 of top surface horizontal central line, and pendulum length is 0.7 meter；With "] " type slideway (6) is even
The side connecing adjacent surface (15) setting slideway (61), the plane constituting when slideway (61) is vertical static with single pendulum (10) with described
Adjacent surface (15) is vertical；Slideway (61) is slidably connected clip (12), and clip (12) is electrically connected with relay (11)；Relay (11)
Electrically connect with pressure transducer (13)；Reading plotter (8), electric magnet (4), vacuum extractor (2) are electrically connected with power supply (1)；Take out
Vacuum equipment (2) is fixedly connected with sealed glass container by suction opeing (21), and suction opeing (21) is provided with vacuum degree measurement probe
And air valve.
Its measuring method comprises the following steps:
Step 1, using levelling device (9) leveling sealed glass container (3), electric magnet (4) is energized, opens seal glass
Container (3) top cover, is placed on absorption at electric magnet little iron ball (5), the bead (51) of single pendulum lower end clamped by clip (12), using little
The gravity of ball (51) stretches the fine rule of single pendulum, covers top cover；
Step 2, using the distance between range sensor (72) measurement of top, two sensor devices (7) of adjustment l,
Make l value be 0.8 meter, and fix two sensor devices (7), open vacuum extractor (2) by sealing container evacuation；
Step 3, disconnects the power supply of electric magnet, measures little iron ball (51) using two Fibre Optical Sensors (71), (73) and falls
During sense in upper end Fibre Optical Sensor (71) through the time of two Fibre Optical Sensors (71), (73), reading plotter (8)
Start timing, the timing when lower end Fibre Optical Sensor (73) senses little iron ball (5) finishes, and record data during little iron ball (5)
Second time t=0.404；
Step 4, little iron ball (5) falls bottom surface, and pressure transducer (13) senses during pressure transmitting telecommunication number to relay
(11), relay (11) controls clip (12) to unclamp bead (51), and up Fibre Optical Sensor (71) is for the first time for reading plotter (8)
Sense single pendulum (10) and start timing, sense single pendulum (10) timing for the third time and finish, the second in cycle t=1.680 of record single pendulum；
Step 5, using formulaCalculate average
Acceleration of gravity
Embodiment 4:
Embodiment 4 is gravity acceleration measurement device, including power supply (1), vacuum extractor (2), sealed glass container
(3), electric magnet (4), little iron ball (5), "] " type slideway (6), Fibre Optical Sensor (71), (73), range sensor (72), reading
Device (8), levelling device (9), single pendulum (10), relay (11), clip (12), pressure transducer (13), sealed glass container
(3) it is cuboid, length, width and height are respectively 1 meter, 0.4 meter and 1.5 meters, and the rib of sealed glass container (3) and the center line in six faces are equal
Steelframe is had to support, for removable top and center is fixedly connected electric magnet (4) to top surface, and bottom center's position setting pressure passes
Sensor (13)；Sealed glass container (3) bottom setting levelling device (9)；Sealed glass container (3) side (14) is fixedly connected one
The vertical center line position of "] " type slideway (6), "] " type slideway (6) (14) on the side, the height of length and sealed glass container (3)
Degree is equal；"] " type slideway (6) is slidably connected two sensor devices (7), sensor device (7) by Fibre Optical Sensor (71),
(73) form with range sensor (72)；The probe of range sensor (72) above is fixedly connected on uppermost sensor dress
Put the lower section of (7)；Fibre Optical Sensor (71), (73) and range sensor (72) are electrically connected with reading plotter (8)；Reading plotter
(8) timing unit and display unit are included；Sealed glass container (3) top surface is fixedly connected single pendulum (10), and single pendulum (10) summit sets
Put at the 1/4 of top surface horizontal central line, pendulum length is 0.9 meter；With "] " adjacent surface (15) setting of the side that is connected of type slideway (6)
Slideway (61), the plane constituting when slideway (61) is vertical static with single pendulum (10) is vertical with described adjacent surface (15)；Slideway (61)
Be slidably connected clip (12), and clip (12) is electrically connected with relay (11)；Relay (11) is electrically connected with pressure transducer (13)；
Reading plotter (8), electric magnet (4), vacuum extractor (2) are electrically connected with power supply (1)；Vacuum extractor (2) passes through suction opeing
(21) it is fixedly connected with sealed glass container, suction opeing (21) is provided with vacuum degree measurement probe and air valve.
Its measuring method comprises the following steps:
Step 1, using levelling device (9) leveling sealed glass container (3), electric magnet (4) is energized, opens seal glass
Container (3) top cover, is placed on absorption at electric magnet little iron ball (5), the bead (51) of single pendulum lower end clamped by clip (12), using little
The gravity of ball (51) stretches the fine rule of single pendulum, covers top cover；
Step 2, using the distance between range sensor (72) measurement of top, two sensor devices (7) of adjustment l,
Make l value be 0.9 meter, and fix two sensor devices (7), open vacuum extractor (2) by sealing container evacuation；
Step 3, disconnects the power supply of electric magnet, measures little iron ball (51) using two Fibre Optical Sensors (71), (73) and falls
During sense in upper end Fibre Optical Sensor (71) through the time of two Fibre Optical Sensors (71), (73), reading plotter (8)
Start timing, the timing when lower end Fibre Optical Sensor (73) senses little iron ball (5) finishes, and record data during little iron ball (5)
Second time t=0.429；
Step 4, little iron ball (5) falls bottom surface, and pressure transducer (13) senses during pressure transmitting telecommunication number to relay
(11), relay (11) controls clip (12) to unclamp bead (51), and up Fibre Optical Sensor (71) is for the first time for reading plotter (8)
Sense single pendulum (10) and start timing, sense single pendulum (10) timing for the third time and finish, the second in cycle t=1.905 of record single pendulum；
Step 5, using formulaCalculate average
Acceleration of gravity
Embodiment 5:
Embodiment 5 is gravity acceleration measurement device, including power supply (1), vacuum extractor (2), sealed glass container
(3), electric magnet (4), little iron ball (5), "] " type slideway (6), Fibre Optical Sensor (71), (73), range sensor (72), reading
Device (8), levelling device (9), single pendulum (10), relay (11), clip (12), pressure transducer (13), sealed glass container
(3) it is cuboid, length, width and height are respectively 1 meter, 0.4 meter and 1.5 meters, and the rib of sealed glass container (3) and the center line in six faces are equal
Steelframe is had to support, for removable top and center is fixedly connected electric magnet (4) to top surface, and bottom center's position setting pressure passes
Sensor (13)；Sealed glass container (3) bottom setting levelling device (9)；Sealed glass container (3) side (14) is fixedly connected one
The vertical center line position of "] " type slideway (6), "] " type slideway (6) (14) on the side, the height of length and sealed glass container (3)
Degree is equal；"] " type slideway (6) is slidably connected two sensor devices (7), sensor device (7) by Fibre Optical Sensor (71),
(73) form with range sensor (72)；The probe of range sensor (72) above is fixedly connected on uppermost sensor dress
Put the lower section of (7)；Fibre Optical Sensor (71), (73) and range sensor (72) are electrically connected with reading plotter (8)；Reading plotter
(8) timing unit and display unit are included；Sealed glass container (3) top surface is fixedly connected single pendulum (10), and single pendulum (10) summit sets
Put at the 1/4 of top surface horizontal central line, pendulum length is 0.9 meter；With "] " adjacent surface (15) setting of the side that is connected of type slideway (6)
Slideway (61), the plane constituting when slideway (61) is vertical static with single pendulum (10) is vertical with described adjacent surface (15)；Slideway (61)
Be slidably connected clip (12), and clip (12) is electrically connected with relay (11)；Relay (11) is electrically connected with pressure transducer (13)；
Reading plotter (8), electric magnet (4), vacuum extractor (2) are electrically connected with power supply (1)；Vacuum extractor (2) passes through suction opeing
(21) it is fixedly connected with sealed glass container, suction opeing (21) is provided with vacuum degree measurement probe and air valve.
Its measuring method comprises the following steps:
Step 1, using levelling device (9) leveling sealed glass container (3), electric magnet (4) is energized, opens seal glass
Container (3) top cover, is placed on absorption at electric magnet little iron ball (5), the bead (51) of single pendulum lower end clamped by clip (12), using little
The gravity of ball (51) stretches the fine rule of single pendulum, covers top cover；
Step 2, using the distance between range sensor (72) measurement of top, two sensor devices (7) of adjustment l,
Make l value be 1.05 meters, and fix two sensor devices (7), open vacuum extractor (2) by sealing container evacuation；
Step 3, disconnects the power supply of electric magnet, measures little iron ball (51) using two Fibre Optical Sensors (71), (73) and falls
During sense in upper end Fibre Optical Sensor (71) through the time of two Fibre Optical Sensors (71), (73), reading plotter (8)
Start timing, the timing when lower end Fibre Optical Sensor (73) senses little iron ball (5) finishes, and record data during little iron ball (5)
Second time t=0.463；
Step 4, little iron ball (5) falls bottom surface, and pressure transducer (13) senses during pressure transmitting telecommunication number to relay
(11), relay (11) controls clip (12) to unclamp bead (51), and up Fibre Optical Sensor (71) is for the first time for reading plotter (8)
Sense single pendulum (10) and start timing, sense single pendulum (10) timing for the third time and finish, the second in cycle t=1.905 of record single pendulum；
Step 5, using formulaCalculate average
Acceleration of gravity
Embodiment 6:
Embodiment 6 is gravity acceleration measurement device, including power supply (1), vacuum extractor (2), sealed glass container
(3), electric magnet (4), little iron ball (5), "] " type slideway (6), Fibre Optical Sensor (71), (73), range sensor (72), reading
Device (8), levelling device (9), single pendulum (10), relay (11), clip (12), pressure transducer (13), sealed glass container
(3) it is cuboid, length, width and height are respectively 1 meter, 0.4 meter and 1.5 meters, and the rib of sealed glass container (3) and the center line in six faces are equal
Brandreth is had to support, for removable top and center is fixedly connected electric magnet (4) to top surface, and bottom center's position setting pressure passes
Sensor (13)；Sealed glass container (3) bottom setting levelling device (9)；Sealed glass container (3) side (14) is fixedly connected one
The vertical center line position of "] " type slideway (6), "] " type slideway (6) (14) on the side, the height of length and sealed glass container (3)
Degree is equal；"] " type slideway (6) is slidably connected two sensor devices (7), sensor device (7) by Fibre Optical Sensor (71),
(73) form with range sensor (72)；The probe of range sensor (72) above is fixedly connected on uppermost sensor dress
Put the lower section of (7)；Fibre Optical Sensor (71), (73) and range sensor (72) are electrically connected with reading plotter (8)；Reading plotter
(8) timing unit and display unit are included；Sealed glass container (3) top surface is fixedly connected single pendulum (10), and single pendulum (10) summit sets
Put at the 1/4 of top surface horizontal central line, pendulum length is 1.05 meters；With "] " adjacent surface (15) setting of the side that is connected of type slideway (6)
Slideway (61), the plane constituting when slideway (61) is vertical static with single pendulum (10) is vertical with described adjacent surface (15)；Slideway (61)
Be slidably connected clip (12), and clip (12) is electrically connected with relay (11)；Relay (11) is electrically connected with pressure transducer (13)；
Reading plotter (8), electric magnet (4), vacuum extractor (2) are electrically connected with power supply (1)；Vacuum extractor (2) passes through suction opeing
(21) it is fixedly connected with sealed glass container, suction opeing (21) is provided with vacuum degree measurement probe and air valve.
Its measuring method comprises the following steps:
Step 1, using levelling device (9) leveling sealed glass container (3), electric magnet (4) is energized, opens seal glass
Container (3) top cover, is placed on absorption at electric magnet little iron ball (5), the bead (51) of single pendulum lower end clamped by clip (12), using little
The gravity of ball (51) stretches the fine rule of single pendulum, covers top cover；
Step 2, using the distance between range sensor (72) measurement of top, two sensor devices (7) of adjustment l,
Make l value be 1.2 meters, and fix two sensor devices (7), open vacuum extractor (2) by sealing container evacuation；
Step 3, disconnects the power supply of electric magnet, measures little iron ball (51) using two Fibre Optical Sensors (71), (73) and falls
During sense in upper end Fibre Optical Sensor (71) through the time of two Fibre Optical Sensors (71), (73), reading plotter (8)
Start timing, the timing when lower end Fibre Optical Sensor (73) senses little iron ball (5) finishes, and record data during little iron ball (5)
Second time t=0.495；
Step 4, little iron ball (5) falls bottom surface, and pressure transducer (13) senses during pressure transmitting telecommunication number to relay
(11), relay (11) controls clip (12) to unclamp bead (51), and up Fibre Optical Sensor (71) is for the first time for reading plotter (8)
Sense single pendulum (10) and start timing, sense single pendulum (10) timing for the third time and finish, the second in cycle t=2.058 of record single pendulum；
Step 5, using formulaCalculate average
Acceleration of gravity
The experimental data of comparative example 1 and embodiment 1-6 is as follows:
Claims (2)
1. acceleration of gravity measurement apparatus, including power supply (1), vacuum extractor (2), sealed glass container (3), its feature exists
In described sealed glass container (3) is cuboid, and top surface is removable top；Sealed glass container (3) end face center position is solid
Surely connect electric magnet (4)；Sealed glass container (3) bottom center position setting pressure transducer (13)；Sealed glass container (3)
Bottom setting levelling device (9)；Sealed glass container (3) side (14) is fixedly connected one "] " type slideway (6), described "] " type cunning
The vertical center line position in road (6) (14) on the side, length is equal with the height of sealed glass container (3)；"] " type slideway (6)
Be slidably connected two sensor devices (7), and sensor device (7) is by Fibre Optical Sensor (71,73) and range sensor (72) group
Become；The probe of range sensor (72) above is fixedly connected on the lower section of uppermost sensor device (7)；Fibre Optical Sensor
(71,73) and range sensor (72) are electrically connected with reading plotter (8)；Reading plotter (8) includes timing unit and display unit；
Sealed glass container (3) top surface is fixedly connected single pendulum (10), and described single pendulum (10) summit is arranged on the 1/4 of top surface horizontal central line
Place, pendulum length is 0.6-0.7 times of sealed glass container (3) height；With "] " adjacent surface (15) of side that is connected of type slideway (6)
Setting slideway (61), the plane constituting when slideway (61) is vertical static with single pendulum (10) is vertical with described adjacent surface (15)；Slideway
(61) be slidably connected clip (12), and clip (12) is electrically connected with relay (11)；Relay (11) and pressure transducer (13) electricity
Connect；Reading plotter (8), electric magnet (4), vacuum extractor (2) are electrically connected with power supply (1)；Described vacuum extractor (2) is passed through
Suction opeing (21) is fixedly connected with sealed glass container, and suction opeing (21) is provided with vacuum degree measurement probe and air valve.
2. according to claim 1 acceleration of gravity measurement apparatus it is characterised in that the rib of described sealed glass container (3)
All there is metal structure with the center line in six faces, described metal rack is one of brandreth, steelframe.
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| CN201620307707.1U CN205910917U (en) | 2016-04-14 | 2016-04-14 | Acceleration of gravity measuring device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106920435A (en) * | 2017-05-15 | 2017-07-04 | 陈肖伊 | For the local gravitational acceleration experimental rig of physics teaching |
| CN106990446A (en) * | 2017-04-28 | 2017-07-28 | 张家安 | A kind of apparatus and method of measure physical parameters |
| CN109326185A (en) * | 2018-11-06 | 2019-02-12 | 吴灶弟 | A kind of multifunctional gravity acceleration test device |
| CN113240980A (en) * | 2021-03-25 | 2021-08-10 | 桂林电子科技大学 | Gravity acceleration measuring device and measuring method thereof |
| CN113568059A (en) * | 2021-07-22 | 2021-10-29 | 柯琪 | Device for measuring gravity acceleration by laser method |
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2016
- 2016-04-14 CN CN201620307707.1U patent/CN205910917U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990446A (en) * | 2017-04-28 | 2017-07-28 | 张家安 | A kind of apparatus and method of measure physical parameters |
| CN106920435A (en) * | 2017-05-15 | 2017-07-04 | 陈肖伊 | For the local gravitational acceleration experimental rig of physics teaching |
| CN106920435B (en) * | 2017-05-15 | 2023-10-31 | 陈肖伊 | Local gravity acceleration test device for physical teaching |
| CN109326185A (en) * | 2018-11-06 | 2019-02-12 | 吴灶弟 | A kind of multifunctional gravity acceleration test device |
| CN113240980A (en) * | 2021-03-25 | 2021-08-10 | 桂林电子科技大学 | Gravity acceleration measuring device and measuring method thereof |
| CN113240980B (en) * | 2021-03-25 | 2023-05-30 | 桂林电子科技大学 | Gravity acceleration measuring device and measuring method thereof |
| CN113568059A (en) * | 2021-07-22 | 2021-10-29 | 柯琪 | Device for measuring gravity acceleration by laser method |
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