CN2271738Y - Areometer densimeter lab instrument - Google Patents
Areometer densimeter lab instrument Download PDFInfo
- Publication number
- CN2271738Y CN2271738Y CN 96216476 CN96216476U CN2271738Y CN 2271738 Y CN2271738 Y CN 2271738Y CN 96216476 CN96216476 CN 96216476 CN 96216476 U CN96216476 U CN 96216476U CN 2271738 Y CN2271738 Y CN 2271738Y
- Authority
- CN
- China
- Prior art keywords
- pulley
- tank
- foil gauge
- areometer
- test circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a floating scale experiment instrument. The utility model is mainly characterized in that two water tanks communicated with each other are arranged in a transparent box body, a floating barrel is suspended on one water tank, a simulating body is suspended on the other water tank, a simulating crystal body is placed on the floating barrel, the upper part inside the box body is provided with a rotating lift and pull system, one end of a pull rope of a pulley passing through the rotating system is connected with a clamping head, the other end of the pull rope is connected with the simulating body, one end of an elastic sheet on which a strain foil is provided is contacted with a supporting plate on the top of the floating barrel, and a leading wire of the strain foil is connected with a testing circuit. The floating scale experiment instrument has the advantages of simple structure, small size, convenient operation and visual observation, and the utility model can carry out a plurality of physical experiments in technical primary and secondary schools, such as application of sensors, fluid mechanics, electronic scales, crystal growth, knowledge of motors, etc.
Description
The utility model belongs to a kind of physical experiment apparatus, particularly a kind of areometer dcensimeter experiment instrument that utilizes strain-ga(u)ge transducer to make.
At present, sensor has been used widely at aspects such as the control automatically of scientific experiment, modern times, commercial production and household electrical appliance, but it is rarely found that it is designed to have the Experiment of College Physics instrument that enriches physical content, and the floating experiment instrument that claims was not also seen.Areometer dcensimeter equipment is adopted in control to its diameter in the crystal growth of monocrystalline vertical pulling stove, has adopted sensor control circuit in its areometer dcensimeter equipment.But this equipment is huge, complex structure, and its sensor control circuit is very accurate.Be difficult for directly perceived the observation.Thereby be not suitable as the Experiment of College Physics instrument and use.
The purpose of this utility model be overcome deficiency of the prior art and provide a kind of simple in structure, model clear and definite, observe areometer dcensimeter experiment instrument directly perceived, as to have the sensor application aspect of enriching physical content.
The purpose of this utility model is achieved in that
The structure of areometer dcensimeter experiment instrument is: adorning level meter (7), tank (9) and tank (10), test circuit box (4) on the base plate of casing (1).Between tank (9) and the tank (10) intercommunicating pore (8) is arranged.Floating drum (11) floats in the tank (9).Putting analogue crystals (12) on the supporting plate of floating drum.Analogue crystals is a plurality of instructions for the use of an article sold crystal column type counterweights, are used for areometer dcensimeter calibration calibration; Also many chains, its chain one terminates on the dop (14), and the other end is deposited on the supporting plate of floating drum, is used at experiment analog-quality continually varying crystal growing process and demonstration the law of buoyancy.The flexure strip (3) that foil gauge (2) are arranged on it is being adorned at the top of test circuit box (4), and an end of its flexure strip inserts under the supporting plate of floating drum (11), and the lead-in wire on the foil gauge is connected on the circuit board in the test circuit box.Casing top above the test circuit box is installing direct current motor (25), motor is connected with circuit board in the test circuit box by electric wire, installing belt pulley (26) on the axle of motor, belt pulley is connecting the pulley (23) in the pulley rotation system that is packed in the casing top by belt (24), pulley in the rotation system (22) is arranged on the centre of two tank tops, stay cord (15) is walked around pulley (22), the one end is connecting the dop (14) that is suspended on tank (9) top, and the other end is connecting the analogue body (13) that is suspended on tank (10) top.
The structure of the pulley rotation system of areometer dcensimeter experiment instrument is, be packed between support plate (16) on the casing (1) and the box back surface plate stationary shaft (17) is installed, adorn sleeve pipe (19) on its axle, installing pulley (22), pulley (23) and gear (20) on the sleeve pipe (19).Movable axis (27) passes support plate (16), and its outer end is installing manually knob (18), the inner end installing can with gear (20) meshed gears (21), the belt pulley (26) of motor (25) is connected with pulley (23) by belt (24).Rotation system is divided into manually and two kinds of machine controls, compress into knob (18), gear (21) and gear (20) engagement, knob is whenever stirred a retaining, the pairing arc length of pulley (22) rotational angle equals a counterweight height, and analogue body is descended or the counterweight height that rises; Pull out knob, two gears separate, and rotation system is driven by motor (25) and rotates.Be machine control state at this moment.
The formation of the test circuit of areometer dcensimeter experiment instrument is that direct supply E is connected with the sensor bridge branch road with direct current motor control branch road through K switch.A direct current motor control route potentiometer R
7Reversing switch K in parallel
1, direct current motor (25) and control voltage tester end U form.Sensor bridge is propped up route electric current I test lead series current and is regulated resistance R
6And by resistance R
1, R
2, R
4Form with the electric bridge that foil gauge r connects and composes, foil gauge r is by disconnect K
2Be connected resistance R with electric bridge
4The place is in series with temperature compensation and regulates resistance R
5U is the bridge output voltage test lead.Power switch K, direct current motor rotating reversing switch K
1, foil gauge disconnect K
2, temperature compensation adjusting knob R
5, current adjusting knob R
6, Motor Control voltage-regulation knob R
7, foil gauge resistance r test lead, electric current I test lead, bridge output voltage u test lead and Motor Control voltage U test lead all be arranged on the panel of test circuit box.Use digital multimeter can measure every electrical quantities.
The utility model compared with prior art has following advantage:
1, increased the experimental apparatus that a kind of model is clear and definite, observe sensor application aspect directly perceived, that physical content is abundant for college physics teaching;
2, use novel areometer dcensimeter experiment instrument can carry out following experiment content with this:
(1) tests the r--M relation curve of putting the counterweight quality on foil gauge resistance and the floating drum, i.e. the pressure drag family curve of foil gauge;
(2) putting the u--M relation curve of counterweight quality on test electric bridge output voltage and the floating drum, promptly is that areometer dcensimeter is calibrated;
(3) counterweight or chain increases, each mutual alignment change phenomenon, i.e. demonstration of the law of buoyancy of analogue body, floating drum and liquid level when subtracting in the observation areometer dcensimeter apparatus system;
(4) the test direct current motor lifts linear velocity and the v--U relation curve of controlling voltage.
Its experiment content relates to many-sided knowledge such as sensor application, fluid mechanics, electricity, crystal growth, electronic scales and motor.Can make the student be subjected to many-sided training and inspiration by above experiment, reach the purpose of the connection between theory and practice, the integration of learning and doing.
3, this areometer dcensimeter experiment instrument is simple in structure, and volume is little, and is easy to operate, and demonstrating visual is applicable to big, special secondary school's Physical Experiment.
The drawing of accompanying drawing is described as follows:
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model rotation system structural representation;
Fig. 3 is the utility model test circuit schematic diagram;
Fig. 4 is the r--M graph of relation of the utility model test foil gauge pressure drag characteristic;
Fig. 5 is the calibration curve figure of the u--M relation of counterweight quality on the utility model test foil gauge output voltage and the floating drum;
Fig. 6 is that the utility model test direct current motor lifts linear velocity and the v--U graph of relation of controlling voltage.
Below in conjunction with accompanying drawing the utility model embodiment is described in further detail:
The structure of areometer dcensimeter experiment instrument is as shown in Figure 1: adorning level-off screw (5) below the marble base plate (6) of the casing made from transparent organic glass (1), top level meter (7), organic glass tank (9) and (10), the test circuit box (4) adorned of base plate.Tank (9) is identical with tank (10) shape, sticks together side by side, and in the bottom of its abutting edge intercommunicating pore (8) is arranged.The organic glass floating drum (11) of inner hollow floats in the tank (9), and the inner organic glass analogue body (13) that injects water is suspended on the top of tank (10).Analogue crystals (12) is placed on floating drum (11) above the top bracket.Analogue crystals has two kinds, and a kind of is the cylindrical organic glass counterweights of a plurality of special instructions for the use of an article sold crystal, is used for areometer dcensimeter calibration calibration, does above-mentioned experiment content 1., 2. and 3.; Another kind is many chains, and an end of its chain is deposited on the floating drum top bracket, and the other end is connected on the dop (14) that is suspended on tank (9) top, is used for doing above-mentioned experiment 3. analog-quality continually varying crystal growing process and demonstration the law of buoyancy.Adorning the elastic steel sheet (3) that posts silicon foil gauge (2) on it on the top board of test circuit box (4), an end of its elastic steel sheet inserts under floating drum (11) top bracket, and the lead-in wire on the silicon foil gauge is connected on the circuit board in the test circuit box.The top of the top in casing (1), test circuit box (4) is installing miniature magnetic DC motor (25), installing belt pulley (26) on the axle of its motor, belt pulley is connecting the pulley (23) in the pulley rotation system that is packed in tank top in the casing by belt (24).One end of the stay cord (15) on the pulley (22) in the pulley rotation system is connected with the dop (14) that is suspended on tank (9) top, and the other end is connected on the analogue body (13) that is suspended on above the tank (10).
The structure of pulley rotation system as shown in Figure 2, be packed between support plate (16) on the casing (1) and the box back surface plate stationary shaft (17) is installed, adorning the sleeve pipe (19) that can rotate on it, installing pulley (22), pulley (23) and gear (20) on the sleeve pipe (19), movable axis (26) passes support plate (16), its outer end is installing manually knob (18), the inner end installing can with gear (20) meshed gears (21), the belt pulley (26) of motor (25) is connected with pulley (23) by belt (24).Between manual knob (18) and the pulley by gear (20) and gear (21) engagement carrying out transmission, compress into knob (18), gear (21) and gear (20) engagement, knob is whenever stirred a retaining, the pairing arc length of pulley (22) rotational angle equals a counterweight height, and analogue body is descended or the counterweight height that rises; Pull out knob, two gears separate, and rotation system is driven by motor (25) and rotates.Be machine control state at this moment.
The method of attachment of test circuit as shown in Figure 3, direct supply E is connected with the sensor bridge branch road through K switch and direct current motor control branch road.A direct current motor control route potentiometer R
7Reversing switch K in parallel
1, direct current motor (25) and control voltage tester end U form.Sensor bridge is propped up route electric current I test lead series current and is regulated resistance R
6And by resistance R
1, R
2, R
4Form with the electric bridge that foil gauge r connects and composes, foil gauge r is by disconnect K
2Be connected resistance R with electric bridge
4The place is in series with temperature compensation and regulates resistance R
5Select R
1=R
2=R
4=R
0, r=R
0(1+ Δ R/R
0), wherein r is the foil gauge resistance, R
0Resistance when for foil gauge deformation not taking place, Δ R is the resistance variable after the foil gauge generation deformation.U is the bridge output voltage test lead.Power switch K, direct current motor rotating reversing switch K
1, foil gauge disconnect K
2, temperature compensation adjusting knob R
5, current adjusting knob R
6, Motor Control voltage-regulation knob R
7, foil gauge resistance r test lead, electric current I test lead, bridge output voltage u test lead and Motor Control voltage U test lead all be arranged on the panel of test circuit box.Use digital multimeter can measure every electrical quantities.
The operational circumstances that will utilize the utility model to carry out above-mentioned various experiments is summarized as follows below:
(1) tests the r--M relation curve of putting the counterweight quality on foil gauge resistance and the floating drum, i.e. the pressure drag family curve of foil gauge.Open K
2R opens from circuit interruption the silicon foil gauge, an end that posts the elastic steel sheet (3) of silicon foil gauge (2) inserts under floating drum (11) top bracket and contacts with floating drum, when not putting counterweight above the floating drum, invade the degree of depth under the adjusting analogue body (13) earlier and make foil gauge that deformation not take place to preset float-level height, corresponding foil gauge resistance is r
m, floating drum top bracket face height is decided to be the reference zero position this moment.Put whole counterweights (12), analogue body (13) rises, and makes the counterweight top be in null position, and the corresponding resistance of foil gauge deformation is r
M, whenever get next counterweight, compress into manual knob (12), make the engagement of gear (21) and gear (20), knob is stirred a retaining, counterweight height of analogue body decline, the corresponding resistance value r of foil gauge distortion
3, r
2, r
1, measure r with multimeter
M, r
3, r
2, r
1And r
mValue, make the r--M relation curve.As shown in Figure 4.
(2) put the u--M relation curve of counterweight quality on test electric bridge output voltage and the floating drum.Promptly be that areometer dcensimeter is calibrated.K and K close a switch
2,, regulate temperature compensation knob R foil gauge r place in circuit
5, make r=r when not putting counterweight
mOutput voltage u
mBe zero; After putting whole counterweights, make r=r
MThe time, adjusting knob R
6Change the size of current value I, the magnitude of voltage u that multimeter is measured
M(mV) suitable with counterweight mass M (g).And then corresponding foil gauge resistance r when measuring counterweight of every minimizing successively
3, r
2, r
1Output voltage values u
3, u
2, u
1, make the u--M relation curve, as shown in Figure 5.
(3) in the observation areometer dcensimeter apparatus system, counterweight increases, each mutual alignment change phenomenon, i.e. demonstration of the law of buoyancy of analogue body, floating drum and liquid level when subtracting.Change counterweight with chain, and the chain upper end is connected on the dop, the lower end is deposited on the floating drum top bracket.Pull out manual knob (18), make gear (21) and gear (20) separately, belt (24) is installed on the belt pulley (26) and pulley (23) on the motor reel, make rotation system be in machine control state, start direct current motor and lift, observe quality the change phenomenon of analogue body (13), floating drum (11) and each mutual alignment of the water surface under the continuous situation of change takes place.
(4) the test direct current motor lifts linear velocity and the v--U relation curve of controlling voltage.Be under the machine control state at rotation system, move with stopwatch mensuration dop and lift the stroke distances required time, promptly obtain linear velocity v, measure control magnitude of voltage U, change the corresponding v value of U pH-value determination pH, make the v--U relation curve, as shown in Figure 6 with multimeter.
Claims (3)
1, a kind of areometer dcensimeter experiment instrument, it is characterized in that: on the base plate of casing (1), adorning level meter (7), tank (9) and tank (10), test circuit box (4), between tank (9) and the tank (10) intercommunicating pore (8) is arranged, floating drum (11) floats in the tank (9), putting analogue crystals (12) on the supporting plate of floating drum, the flexure strip (3) that foil gauge (2) are arranged on it is being adorned at the top of test circuit box (4), one end of its flexure strip inserts under the supporting plate of floating drum (11), lead-in wire on the foil gauge is connected on the circuit board in the test circuit box, casing top above the test circuit box is installing direct current motor (25), motor is connected with wiring board in the test circuit box by electric wire, installing belt pulley (26) on the axle of motor, belt pulley is connecting the pulley (23) in the pulley rotation system that is packed in the casing top by belt (24), pulley in the rotation system (22) is arranged on the centre of two tank tops, stay cord (15) is walked around pulley (22), the one end is connecting the dop (14) that is suspended on tank (9) top, and the other end is connecting the analogue body (13) that is suspended on tank (10) top.
2, according to the said areometer dcensimeter experiment instrument of claim 1, it is characterized in that: the structure of pulley rotation system is, be packed between support plate (16) on the casing (1) and the box back surface plate and adorning stationary shaft (17), adorning sleeve pipe (19) on its axle, installing pulley (22), pulley (23) and gear (20) on the sleeve pipe (19), movable axis (27) passes support plate (16), its outer end is installing manually knob (18), the inner end installing can with gear (20) meshed gears (21), motor (25) is connected with pulley (23) by belt (24).
3, according to the said areometer dcensimeter experiment instrument of claim 1, it is characterized in that: the formation of test circuit is that direct supply E is connected with the sensor bridge branch road with direct current motor control branch road through K switch, a direct current motor control route potentiometer R
7Reversing switch K in parallel
1, direct current motor (25) and control voltage tester end U form, sensor bridge is propped up route electric current I test lead series current and is regulated resistance R
6With by resistance R
1, R
2, R
4Form with the electric bridge that foil gauge r connects and composes, foil gauge r is by disconnect K
2Be connected resistance R with electric bridge
4The place is in series with temperature compensation and regulates resistance R
5, u is the bridge output voltage test lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96216476 CN2271738Y (en) | 1996-08-05 | 1996-08-05 | Areometer densimeter lab instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96216476 CN2271738Y (en) | 1996-08-05 | 1996-08-05 | Areometer densimeter lab instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2271738Y true CN2271738Y (en) | 1997-12-31 |
Family
ID=33897957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96216476 Expired - Fee Related CN2271738Y (en) | 1996-08-05 | 1996-08-05 | Areometer densimeter lab instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2271738Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110906850A (en) * | 2019-12-04 | 2020-03-24 | 昆明理工大学 | Accurate positioning device and method for inclined deep hole sensor |
-
1996
- 1996-08-05 CN CN 96216476 patent/CN2271738Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110906850A (en) * | 2019-12-04 | 2020-03-24 | 昆明理工大学 | Accurate positioning device and method for inclined deep hole sensor |
| CN110906850B (en) * | 2019-12-04 | 2021-04-27 | 昆明理工大学 | Accurate positioning device and method for inclined deep hole sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |