CN202650359U - Pressure digital display type Boyle law demonstrator - Google Patents
Pressure digital display type Boyle law demonstrator Download PDFInfo
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- CN202650359U CN202650359U CN 201220339484 CN201220339484U CN202650359U CN 202650359 U CN202650359 U CN 202650359U CN 201220339484 CN201220339484 CN 201220339484 CN 201220339484 U CN201220339484 U CN 201220339484U CN 202650359 U CN202650359 U CN 202650359U
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Abstract
The utility model discloses a pressure digital display type Boyle law demonstrator, comprising a base, and a pressure transmission display system and a gas volume test system disposed on the base. The pressure transmission display system comprises a hydraulic chamber, a pressure sensor, a microprocessor, a pressure intensity display screen, a safety valve and an air-intake duct. The pressure sensor and the safety valve are disposed on top of the hydraulic chamber. The pressure sensor and the pressure intensity display screen are connected with the microprocessor through data lines. An inner mouth of the air-intake duct is disposed on an upper part in the hydraulic chamber. The air-intake duct is provided with an intake valve which is disposed outside the hydraulic chamber. A lower part of the hydraulic chamber is communicated with the gas volume test system through a connecting pipe. The pressure digital display type Boyle law demonstrator is reasonable in design, simple in structure, good in specificity, and low in experimental error, and has very good visibility, thereby fully improving teaching effect. The pressure digital display type Boyle law demonstrator has good practicality and is easy to popularize and apply.
Description
Technical field
The utility model relates to a kind of instruments used for education, particularly a kind of pressure digital display Boyle law demonstration device.
Background technology
Take as an elective course in the 3-3 volume at newly organized regular senior secondary school curricular standard experiment textbook " physics ", when lecturing " Bo Yier law ", need to probe into lecture experiment.
Probing into the Bo Yier law is the senior middle school physics teaching content, still, never has since the establishment of the nation instrumentation, in the outfit instruments used for education catalogue before the Ministry of Education, adopts " gas law demonstration device " to do experiment.Because " gas law demonstration device " specificity is not strong, experimental error is larger, and visibility is not high, has a strong impact on teaching efficiency.When the Ministry of Education in 2010 promulgates new regular senior secondary school science teaching apparatus preparation standard, increased Bo Yier law demonstration device project newly.This teaching instrumentation is the domestic approved product that there is no at present.
The utility model content
The utility model is in order to solve weak point of the prior art, provides that a kind of experimental precision is high, visibility strong, helps to promote the Boyle law demonstration device of teaching efficiency.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: pressure digital display Boyle law demonstration device, comprise base, base is provided with pressure and transmits display system and gas volume testing system, described pressure transmits display system and comprises hydraulic pressure chamber, pressure transducer, microprocessor, the pressure display screen, safety valve and air induction conduit, pressure transducer and safety valve are located at the hydraulic pressure chamber top, pressure transducer is connected by data line with the pressure display screen and is connected with microprocessor, the inner mouth of pipe of air induction conduit is positioned at the hydraulic pressure chamber internal upper part, air induction conduit is provided with the gas admittance valve that is positioned at the hydraulic pressure chamber outside, and the hydraulic pressure chamber bottom is communicated with the gas volume test macro by connecting pipe.
Described gas volume test macro comprises air storage post, intake-discharge pipe and scaleplate, and intake-discharge pipe is connected with the bottom of air storage post, and intake-discharge pipe is provided with water-inflow and drain valve, and scaleplate is located at air storage post sidepiece, and air storage post bottom is connected with an end of connecting pipe; Described hydraulic pressure chamber and air storage post are all made by transparent material.
Adopt technique scheme, when demonstrate in the classroom, open first water-inflow and drain valve, in the air storage post and by connecting pipe, in hydraulic pressure chamber, be filled with a certain amount of water, then close water-inflow and drain valve, then open gas admittance valve, by air induction conduit charged pressure gas in the hydraulic pressure chamber, pressed gas is pressed into the water in the hydraulic pressure chamber in the air storage post by connecting pipe, pressure transducer collects the pressure signal in the hydraulic pressure chamber, and pressure signal is transferred to microprocessor, and microprocessor is converted to digital signal with pressure signal and demonstrates concrete pressure numerical value at the pressure display screen, pressure is larger, and the volume of the air column on air storage post top is less.Thereby certain gas of demonstration certain mass, in the situation that temperature-resistant, pressure P and volume V are inversely proportional to.Do lecture experiment with the utility model, get arbitrarily 10 groups of data and calculate, average error is less than 1.0%.After demonstration finishes, open water-inflow and drain valve, the water discharge is got final product.Safety valve plays the effect of avoiding the excessive damage parts of pressure.
The utility model is reasonable in design, simple in structure, and specificity is strong, and experimental error is little, and has extremely strong visibility, has fully improved teaching efficiency, and is practical, is easy to apply.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, pressure digital display Boyle law demonstration device of the present utility model, comprise base 1, base 1 is provided with pressure and transmits display system and gas volume testing system, pressure transmits display system and comprises hydraulic pressure chamber 2, pressure transducer 3, microprocessor 13, pressure display screen 14, safety valve 4 and air induction conduit 5, pressure transducer 3 and safety valve 4 are located at hydraulic pressure chamber 2 tops, pressure transducer 3 is connected with the pressure display screen and is connected with microprocessor 13 by data line respectively, the inner mouth of pipe of air induction conduit 5 is positioned at hydraulic pressure chamber 2 internal upper parts, and air induction conduit 5 is provided with the gas admittance valve 6 that is positioned at hydraulic pressure chamber 2 outsides.
The gas volume test macro comprises air storage post 7, intake-discharge pipe 8 and scaleplate 9, intake-discharge pipe 8 is connected with the bottom of air storage post 7, intake-discharge pipe 8 is provided with water-inflow and drain valve 10, and scaleplate 9 is located at air storage post 7 sidepieces, and air storage post 7 bottoms are communicated with by a joint connecting pipe 11 hydraulic pressure chambers 2 bottoms.
Air storage post 7 transparent material manufacturing, significant height is not less than 400mm, and wall thickness is not less than 3mm; Visibility is higher, and gas volume changes test accurately.
Scaleplate 9 is close to air storage post 7 both sides, changes calibration 100 five equilibriums by gas volume scale is set from top to bottom, and per 10 five equilibriums indicate numerical value, reads conveniently calculating simplicity.
The hydraulic pressure transfer mode is adopted in the pressure transmission, and the air storage post that has overcome existing " gas law demonstration device " is shorter, uses piston pressurization, and frictional heat affects gas temperature to be changed, and causes the larger defective of experimental error.Hydraulic pressure chamber 2 of the present utility model is used liquid pressing by the transparent material manufacturing, and the pressure transmittance process is high-visible, and control is steady, and value is accurate.
Bian converts the signal that pressure transducer 3 gathers to digital signal with pressure transducer 3 test pressures by microprocessor 13, shows at pressure display screen 14, the pressure range is 0-0.25Mpa, scale division value 0.01Mpa, 4.0 grades of precision, the error of indication should be not more than 1 scale division value.
When demonstrate in the classroom, open first water-inflow and drain valve 10, in air storage post 7 and by connecting pipe 11, in hydraulic pressure chamber 2, be filled with a certain amount of water 12 by intake-discharge pipe 8, then close water-inflow and drain valve 10, then open gas admittance valve 6, by air induction conduit 5 to hydraulic pressure chamber 2 interior charged pressure gases, pressed gas is pressed into the water 12 in the hydraulic pressure chamber 2 in the air storage post 7 by connecting pipe 11, water column in the air storage post 7 rises, the air column volume reduces, pressure transducer 3 collects the pressure signal in the hydraulic pressure chamber 2, pressure signal is transferred to microprocessor 13, microprocessor 13 is converted to digital signal with pressure signal and demonstrates concrete pressure numerical value at pressure display screen 14, and numerical value is larger, and the volume of the air column on air storage post 7 tops is less.Thereby certain gas of demonstration certain mass, in the situation that temperature-resistant, pressure P and volume V are inversely proportional to.After demonstration finishes, open water-inflow and drain valve 10, the water discharge is got final product.
Claims (2)
1. pressure digital display Boyle law demonstration device, comprise base, base is provided with pressure and transmits display system and gas volume testing system, it is characterized in that: described pressure transmits display system and comprises hydraulic pressure chamber, pressure transducer, microprocessor, the pressure display screen, safety valve and air induction conduit, pressure transducer and safety valve are located at the hydraulic pressure chamber top, pressure transducer is connected by data line with the pressure display screen and is connected with microprocessor, the inner mouth of pipe of air induction conduit is positioned at the hydraulic pressure chamber internal upper part, air induction conduit is provided with the gas admittance valve that is positioned at the hydraulic pressure chamber outside, and the hydraulic pressure chamber bottom is communicated with the gas volume test macro by connecting pipe.
2. pressure digital display Boyle law demonstration device according to claim 1, it is characterized in that: described gas volume test macro comprises air storage post, intake-discharge pipe and scaleplate, intake-discharge pipe is connected with the bottom of air storage post, intake-discharge pipe is provided with water-inflow and drain valve, scaleplate is located at air storage post sidepiece, and air storage post bottom is connected with an end of connecting pipe; Described hydraulic pressure chamber and air storage post are all made by transparent material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220339484 CN202650359U (en) | 2012-07-13 | 2012-07-13 | Pressure digital display type Boyle law demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220339484 CN202650359U (en) | 2012-07-13 | 2012-07-13 | Pressure digital display type Boyle law demonstrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202650359U true CN202650359U (en) | 2013-01-02 |
Family
ID=47419429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220339484 Expired - Fee Related CN202650359U (en) | 2012-07-13 | 2012-07-13 | Pressure digital display type Boyle law demonstrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202650359U (en) |
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2012
- 2012-07-13 CN CN 201220339484 patent/CN202650359U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20150713 |
|
| EXPY | Termination of patent right or utility model |