CN107103818A - A kind of multifunctional physics teaching experimental bench - Google Patents
A kind of multifunctional physics teaching experimental bench Download PDFInfo
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- CN107103818A CN107103818A CN201710548126.6A CN201710548126A CN107103818A CN 107103818 A CN107103818 A CN 107103818A CN 201710548126 A CN201710548126 A CN 201710548126A CN 107103818 A CN107103818 A CN 107103818A
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- circuit
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- weighing
- infrared
- testing stand
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
- G09B23/10—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics of solid bodies
Abstract
The present invention relates to technical field of physical experiment, specifically related to a kind of multifunctional physics teaching experimental bench, including infrared counting system, weighing system, altitude measurement system, display system, communication system and central processing system, the testing stand is connected by spring section with the weighing plate of the weighing system, the spring section includes spring and expansion link, the spring is socketed on the expansion link, the infrared counting system, weighing system, altitude measurement system and display system are connected with the central processing system, the central processing system is connected by the communication system with remote control terminal, the infrared counting system is arranged on the testing stand, the altitude measurement system is arranged on the bottom of the testing stand, spring is used to provide restoring force, expansion link prevents deflection.Simple in construction, simple operation of the invention, realizes intelligent control, realizes remote control, with very strong creativeness.
Description
Technical field
The present invention relates to technical field of physical experiment, and in particular to a kind of multifunctional physics teaching experimental bench.
Background technology
Experiment, refers to one of basic skills of scientific research.According to the purpose of scientific research, exclude as much as possible extraneous
Influence, prominent principal element simultaneously utilizes some special instrument and equipments, and artificially changes, controls or analog study object,
Certain some things (or process) is occurred or is reproduced, thus go to know natural environment appearance, natural property, the natural law.Physics is
Study the subject of the motion of matter most typically rule and material basic structure.It is used as the heading discipline of natural science, physics research
Greatly to universe, the as low as most basic forms of motion of all materials such as elementary particle and rule, therefore as other each natural sciences
The Research foundation of subject.Its theoretical construct is made full use of working language of the mathematics as oneself, and reason is examined to test to be used as
By the sole criterion of correctness, it is a current most accurate natural science subject.With the development of science and technology the hair of society
Exhibition, all trades and professions of China have obtained quick development, and the thing followed is the fast development of realia.At present, in thing
In reason teaching, many knowledge are more abstract, are difficult to understand for only according to teacher explanation student, are at this moment accomplished by helping by Physical Experiment
Student understands.But, the corresponding experimental facilities in each current knowledge point is single, when saying the knowledge point being ignorant of, and is needed
Multiple experimental facilities are moved into classroom, it is cumbersome.In Patent No. CN201610961854 patent document, disclose
A kind of multifunctional physics teaching experimental bench, the experimental bench can gather together the experimental provision of multiple knowledge points, it is to avoid
The problem of needing multiple lift to move experimental facilities, its structure includes the first platen, and the first described platen is integrally square, in bottom
Four corners be hinged with by the first jointed shaft downwardly vertical in the sleeve of under shed, sleeve be provided with pole, set separately down
The side wall of cylinder is provided with the fastening bolt for being used for fixing pole；Spring is provided between the bottom and bottom surface of the first described platen；
The upper surface of the first described platen is provided with the first slide groove and the second slide groove side by side respectively close to right side, the second slide groove
Bottom surface is provided with irregular rubber salient point.It is simple to operate, easy to use, it is adaptable to a variety of places.
Above-mentioned patent document is integrally square due to the first described platen, is passed through separately down in four corners of bottom
First jointed shaft be hinged with it is downwardly vertical in the sleeve of under shed, sleeve be provided with pole, the side wall of sleeve, which is provided with, to be used to fix
The fastening bolt of pole, therefore, in use, the first platen with integrally-regulated height, can adapt to the academics and students of different heights,
And table top can be adjusted to skewed, it is that steel ball rolling is prepared below, it is an energy-saving and environmental protection equipment, with fine
Utilization and extention value.But for how to provide a kind of simple in construction, simple operation, intelligent control is realized, realize long-range control
The multifunctional physics teaching experimental bench of system lacks technical solution.
The content of the invention
(1) technical problem solved
In view of the shortcomings of the prior art, the invention provides a kind of multifunctional physics teaching experimental bench, for solve how
A kind of simple in construction, simple operation is provided, realizes intelligent control, realize that the multifunctional physics teaching experimental bench of remote control is asked
Topic.
(2) technical scheme
To realize object above, the present invention is achieved by the following technical programs：
A kind of multifunctional physics teaching experimental bench, including testing stand and hydraulic lifting post, the hydraulic lifting post are arranged on
The bottom corner position of the testing stand, it is characterised in that：Including infrared counting system, weighing system, altitude measurement system, aobvious
Show system, communication system and central processing system, the weighing plate phase that the testing stand passes through spring section and the weighing system
Even, the spring section includes spring and expansion link, and the spring is socketed on the expansion link, and the spring passes through mounting seat
Be connected with the testing stand, the infrared counting system, weighing system, altitude measurement system and display system with the center
Processing system is connected, and the central processing system is connected by the communication system with remote control terminal, the infrared counting system
System is arranged on the testing stand, and the altitude measurement system is arranged on outside the bottom of the testing stand, the hydraulic lifting post
Connect switch and power supply.
It is preferred that, the infrared transmitter of the infrared counting system by the modulation of electric capacity positive feedback formula swing device circuit,
40kHz pulse oscillators and drive circuit composition, the electric capacity positive feedback formula modulating oscillator circuit is by NAND gate integrated circuit
IC1 is D1 and D2 and resistor R1 and R2, the capacitor C1 compositions inside D1~D4；The 40kHz pulse oscillator circuits by
D3 and D4 and resistor R3 and R4, capacitor C2 compositions inside IC1；The drive circuit is by NAND gate IC 2
D5, D6, resistor R5 and R6, transistor V1 and the lattice pipe VL1 of infraluminescence two compositions.
It is preferred that, the infrared receiver counting circuit of the infrared counting system is by infrared receiver amplifying circuit, monostable
Triggers circuit A, single-shot trigger circuit B and counter composition, the infrared receiver amplifying circuit received outside line head IC5,
Resistor R7 and R8 and transistor V2 compositions；The single-shot trigger circuit B by time-base integrated circuit IC4 and resistor R12 and
R13 and capacitor C6~C8 compositions；Counter circuit uses five digit number or panel counter, and its full-scale reading has for " 9999 "
There are memory retention function and Protection Counter Functions.
It is preferred that, when moving object not yet enters infrared light monitored space in the infrared counting system, IC5 can receive VL1
The modulation infrared signal of transmitting and export high level, counter is not counted；When product is sheltered from by infrared light monitored space
During the infrared light of VL1 transmittings, IC5 output symmetric block signals；This signal makes single-shot trigger circuit A after the anti-phase amplifications of V2
Triggered and overturn, transient state, IC3 3 pin output high level are changed into from stable state；After 4~5s delay, single-shot trigger circuit
A reverts to stable state, and IC3 3 pin are changed into low level from high level, single-shot trigger circuit B is triggered and is overturn, IC4 3 pin
Export high level；After 10ms delay, IC3 3 pin are changed into low level from high level, produce the positive arteries and veins that a width is 10ms
Punching, makes rolling counters forward once, while VL2 is glittering once；Above procedure is repeated continuously, i.e., whenever product is supervised by infrared light
When surveying area, counter is just counted once, and the reading of counter just have recorded the sum of output on duty.
It is preferred that, the weighing system is by weighing sensor, amplifying circuit, A/D conversions and the part of liquid crystal display circuit four
Composition, E is 9V laminated cells, and R1~R4 is 4 sheet resistance foil gauges of weighing sensor, R5, R6 and RPI component part adjustment electricity
Road, when load is zero, regulation RPI makes LCDs show zero；IC1, IC2 are two in double operational integrated circuit LM358
Individual element circuit；A1, A2 constitute a symmetrical in-phase amplifier, and A/D converter employs 7106 biproduct parting A/D conversions
Device.
It is preferred that, the Transistor-Transistor Logic level pin input pin 9,10 of the communication system, connection ATmega16 serial transmission connects
Mouth TXD and serial received interface RXD, is RS232 level by level conversion, passes through 7 pin and 8 pin connect 2 pin of serial line interface
With 3 pin, serial line interface connects the serial line interface of sampling module and the serial line interface of PC by null modem cable；ATmega16 leads to
Cross inside programming and easily convey data to PC.
(3) beneficial effect
The testing stand of the present invention is connected by spring section with the weighing plate of weighing system, and spring section includes spring and stretched
Contracting bar, spring is socketed on expansion link, infrared counting system, weighing system, altitude measurement system and display system with center
Processing system is connected, and central processing system is connected by communication system with remote control terminal, and infrared counting system is arranged on experiment
On platform, altitude measurement system is arranged on the bottom of testing stand, and spring is used to provide restoring force, and expansion link prevents deflection.The present invention
Simple in construction, intelligent control is realized in simple operation, realizes remote control, with very strong creativeness.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the circuit theory diagrams of the Infrared Measuring System of the present invention；
Fig. 3 is the weighing system circuit theory diagrams of the present invention；
Fig. 4 is the communication interface electric power schematic diagram of the present invention；
Fig. 5 is the display circuit system schematic diagram of the present invention；
Label in Fig. 1 is represented respectively：
1st, testing stand；2nd, hydraulic lifting post；3rd, mounting seat；4th, expansion link；5th, spring；6th, infrared counting system；7th, height
Measuring system；8th, weighing system.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
A kind of multifunctional physics teaching experimental bench as shown in Figure 1, including testing stand and hydraulic lifting post, hydraulic lifting post
Be arranged on the bottom corner position of testing stand, in addition to infrared counting system, weighing system, altitude measurement system, display system,
Communication system and central processing system, testing stand are connected by spring section with the weighing plate of weighing system, and spring section includes
Spring and expansion link, spring are socketed on expansion link, and spring is connected by mounting seat with testing stand, infrared counting system, are weighed
System, altitude measurement system and display system are connected with central processing system, and central processing system is by communication system and far
Process control end is connected, and infrared counting system is arranged on testing stand, and altitude measurement system is arranged on the bottom of testing stand, hydraulic pressure liter
Post outside connected switch and power supply drop.
The infrared transmitter of infrared counting system as shown in Figure 2 by electric capacity positive feedback formula modulation swing device circuit,
40kHz pulse oscillators and drive circuit are constituted, and electric capacity positive feedback formula modulating oscillator circuit is by NAND gate IC 1
D1 and D2 and resistor R1 and R2, capacitor C1 compositions inside D1~D4；40kHz pulse oscillator circuits are inside IC1
D3 and D4 and resistor R3 and R4, capacitor C2 compositions；Drive circuit is D5, D6, resistor R5 by NAND gate IC 2
And R6, transistor V1 and the lattice pipe VL1 of infraluminescence two compositions.
The infrared receiver counting circuit of infrared counting system is by infrared receiver amplifying circuit, single-shot trigger circuit A, list
Stable trigger circuit B and counter composition, infrared receiver amplifying circuit receive head IC5, resistor R7 and R8 and crystalline substance outside line
Body pipe V2 is constituted；Single-shot trigger circuit B is by time-base integrated circuit IC4 and resistor R12 and R13 and capacitor C6~C8 groups
Into；Counter circuit uses five digit number or panel counter, and its full-scale reading is that " 9999 " have memory retention function and clear
Zero power energy.
When moving object not yet enters infrared light monitored space in infrared counting system, the modulation that IC5 can receive VL1 transmittings is red
Outer optical signal and export high level, counter is not counted；When product shelters from the infrared of VL1 transmittings by infrared light monitored space
Light time, IC5 output symmetric block signals；This signal makes single-shot trigger circuit A be triggered and overturn after the anti-phase amplifications of V2,
Transient state, IC3 3 pin output high level are changed into from stable state；After 4~5s delay, single-shot trigger circuit A reverts to stable state,
IC3 3 pin are changed into low level from high level, single-shot trigger circuit B is triggered and is overturn, IC4 3 pin output high level；
After 10ms delay, IC3 3 pin are changed into low level from high level, produce the positive pulse that a width is 10ms, make counter
Count once, while VL2 is glittering once；Above procedure is repeated continuously, i.e., when product passes through ultra red monitor area, count
Device is just counted once, and the reading of counter just have recorded the sum of output on duty.
Weighing system as shown in Figure 3 is by weighing sensor, amplifying circuit, A/D conversions and the part of liquid crystal display circuit four
Composition, E is 9V laminated cells, and R1~R4 is 4 sheet resistance foil gauges of weighing sensor, R5, R6 and RPI component part adjustment electricity
Road, when load is zero, regulation RPI makes LCDs show zero；IC1, IC2 are two in double operational integrated circuit LM358
Individual element circuit；A1, A2 constitute a symmetrical in-phase amplifier, and A/D converter employs 7106 biproduct parting A/D conversions
Device.
The Transistor-Transistor Logic level pin input pin 9,10 of communication system as shown in Figure 4, connection ATmega16 serial transmission connects
Mouth TXD and serial received interface RXD, is RS232 level by level conversion, passes through 7 pin and 8 pin connect 2 pin of serial line interface
With 3 pin, serial line interface connects the serial line interface of sampling module and the serial line interface of PC by null modem cable；ATmega16 leads to
Cross inside programming and easily convey data to PC.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or deposited between operating
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Nonexcludability is included, so that process, method, article or equipment including a series of key elements not only will including those
Element, but also other key elements including being not expressly set out, or also include being this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there is other identical element in process, method, article or equipment including the key element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification or
Replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (6)
1. a kind of multifunctional physics teaching experimental bench, including testing stand and hydraulic lifting post, the hydraulic lifting post are arranged on institute
State the bottom corner position of testing stand, it is characterised in that：Including infrared counting system, weighing system, altitude measurement system, display
System, communication system and central processing system, the testing stand are connected by spring section with the weighing plate of the weighing system,
The spring section includes spring and expansion link, and the spring is socketed on the expansion link, the spring by mounting seat with
The testing stand be connected, the infrared counting system, weighing system, altitude measurement system and display system with the centre
Reason system is connected, and the central processing system is connected by the communication system with remote control terminal, the infrared counting system
It is arranged on the testing stand, the altitude measurement system is arranged on the bottom of the testing stand, the hydraulic lifting post is external
Switch and power supply.
2. multifunctional physics teaching experimental bench according to claim 1, it is characterised in that：The infrared counting system it is red
Outside line radiating circuit swings device circuit, 40kHz pulse oscillators and drive circuit by the modulation of electric capacity positive feedback formula and constituted, the electric capacity
Positive feedback formula modulating oscillator circuit by D1 and D2 and resistor R1 and R2 that NAND gate IC 1 is inside D1~D4,
Capacitor C1 is constituted；D3 and D4 and resistor R3 and R4, capacitor C2 of the 40kHz pulse oscillator circuits inside IC1
Composition；The drive circuit is D5, D6, resistor R5 and R6, transistor V1 and infraluminescence two by NAND gate IC 2
Lattice pipe VL1 is constituted.
3. multifunctional physics teaching experimental bench according to claim 1, it is characterised in that：The infrared counting system it is red
Outer reception counting circuit is by infrared receiver amplifying circuit, single-shot trigger circuit A, single-shot trigger circuit B and counter group
Into the infrared receiver amplifying circuit receives head IC5, resistor R7 and R8 and transistor V2 outside line and constituted；It is described monostable
State triggers circuit B is made up of time-base integrated circuit IC4 and resistor R12 and R13 and capacitor C6~C8；Counter circuit is used
Five digit number or panel counter, its full-scale reading are that " 9999 " have memory retention function and Protection Counter Functions.
4. multifunctional physics teaching experimental bench according to claim 1, it is characterised in that：Transported in the infrared counting system
When animal body not yet enters infrared light monitored space, IC5 can receive the modulation infrared signal of VL1 transmittings and export high level, count
Number device is not counted；When product shelters from the infrared light of VL1 transmittings by infrared light monitored space, IC5 output symmetrical square wave letters
Number；This signal makes single-shot trigger circuit A be triggered and overturn after the anti-phase amplifications of V2, and transient state, IC3 3 pin are changed into from stable state
Export high level；After 4~5s delay, single-shot trigger circuit A reverts to stable state, and IC3 3 pin are changed into low electricity from high level
It is flat, single-shot trigger circuit B is triggered and is overturn, IC4 3 pin output high level；After 10ms delay, IC3 3 pin by
High level is changed into low level, produces the positive pulse that a width is 10ms, makes rolling counters forward once, while VL2 is glittering once；
Above procedure is repeated continuously, i.e., when product passes through ultra red monitor area, counter is just counted once, the reading of counter
It just have recorded the sum of output on duty.
5. multifunctional physics teaching experimental bench according to claim 1, it is characterised in that：The weighing system is by biography of weighing
Sensor, amplifying circuit, A/D conversions and the part of liquid crystal display circuit four composition, E are 9V laminated cells, and R1~R4 is weighing and sensing
4 sheet resistance foil gauges of device, R5, R6 and RPI component part adjustment circuit, when load is zero, regulation RPI makes LCDs
Display zero；IC1, IC2 are two element circuits in double operational integrated circuit LM358；A1, A2 constitute a symmetrical same phase
Amplifier, A/D converter employs 7106 biproduct parting A/D converters.
6. multifunctional physics teaching experimental bench according to claim 1, it is characterised in that：The TTL electricity of the communication system
Flat pin input pin 9,10, connects ATmega16 serial transmission interface TXD and serial received interface RXD, is turned by level
RS232 level is changed to, 2 pin and 3 pin of serial line interface are connected by 7 pin and 8 pin, serial line interface is adopted by null modem cable connection
The serial line interface of egf block and the serial line interface of PC；ATmega16 easily conveys data to PC by inside programming
Machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710548126.6A CN107103818A (en) | 2017-07-06 | 2017-07-06 | A kind of multifunctional physics teaching experimental bench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710548126.6A CN107103818A (en) | 2017-07-06 | 2017-07-06 | A kind of multifunctional physics teaching experimental bench |
Publications (1)
| Publication Number | Publication Date |
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| CN107103818A true CN107103818A (en) | 2017-08-29 |
Family
ID=59664682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710548126.6A Pending CN107103818A (en) | 2017-07-06 | 2017-07-06 | A kind of multifunctional physics teaching experimental bench |
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| CN (1) | CN107103818A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108903306A (en) * | 2018-07-11 | 2018-11-30 | 河海大学 | A kind of micro- vibration Double-layer intelligent instrument platform |
| CN109856181A (en) * | 2019-02-19 | 2019-06-07 | 商洛学院 | A kind of lift college physics teaching expansion coefficients of metal wire measurement device |
| CN110937271A (en) * | 2019-12-10 | 2020-03-31 | 深圳市林辰展华科技有限公司 | Intelligent classification system and device for garbage throwing through weight tracing |
| CN112290933A (en) * | 2020-11-08 | 2021-01-29 | 湖南省福晶电子有限公司 | Automatic counting system for electronic elements |
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| GB2345440A (en) * | 1998-11-21 | 2000-07-12 | Advanced Motion Tech Llc | Load support with adjustable pressure support surface. |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108903306A (en) * | 2018-07-11 | 2018-11-30 | 河海大学 | A kind of micro- vibration Double-layer intelligent instrument platform |
| CN109856181A (en) * | 2019-02-19 | 2019-06-07 | 商洛学院 | A kind of lift college physics teaching expansion coefficients of metal wire measurement device |
| CN110937271A (en) * | 2019-12-10 | 2020-03-31 | 深圳市林辰展华科技有限公司 | Intelligent classification system and device for garbage throwing through weight tracing |
| CN112290933A (en) * | 2020-11-08 | 2021-01-29 | 湖南省福晶电子有限公司 | Automatic counting system for electronic elements |
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Application publication date: 20170829 |