CN101533576A - Experimental device for candle self-ignition under weightlessness condition - Google Patents
Experimental device for candle self-ignition under weightlessness condition Download PDFInfo
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- CN101533576A CN101533576A CN 200810034652 CN200810034652A CN101533576A CN 101533576 A CN101533576 A CN 101533576A CN 200810034652 CN200810034652 CN 200810034652 CN 200810034652 A CN200810034652 A CN 200810034652A CN 101533576 A CN101533576 A CN 101533576A
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Abstract
An experimental device for candle self-ignition under weightlessness condition mainly comprises an experimental cabinet designed according to design key points of a flight vehicle, an experimental platform which is used for arranging a candle wick and arranged inside the experimental cabinet, a camera which is arranged at the same horizontal level with the candle wick and used for recording the experimental phenomena in real time, and a power supply. The experimental device is characterized in that a heating cord and a normal-closed double-metal-sheet thermo-relay are adjacent to the candle wick; the heating cord is connected with a normal-open contact a of an electromagnetic relay in series to form a circuit A; and a dry reed relay is connected with a normal-open contact b of the electromagnetic relay in parallel and then is connected with the normal-closed double-metal-sheet thermo-relay and the coil of the electromagnetic relay in series to form a circuit B. An electromagnet is arranged on the outer part of the experimental cabinet; and two ends of the electromagnet coil are connected through a control circuit with a power supply. The candle self-ignition can be realized through controlling the switching on and off of current and controlling the time of switching on; and then the troublesome manual ignition steps can be reduced largely, thus enhancing the operability of the experiment.
Description
Technical field
The present invention relates to a kind of physics demonstration experiment device, the candle igniting demonstrating experiment device under particularly a kind of weightlessness.
Technical background
The experimental section of Ministry of Education's 2005 " regular senior secondary school's physics curricular standard " requires the student to understand the experiment of carrying out in space capsule or the artificial satellite under the microgravity condition, the Laboratory Module of existing weightless test education demonstrator designs according to the Flight Vehicle Design main points, the experiment porch of placing match is arranged in the Laboratory Module, be in the camera and the power supply of the real time record experimental phenomena of same level height with match, on the bulkhead of Laboratory Module, be provided with the fire hole that is used for the manual firing, have experimental implementation person to utilize burning torch to see through fire hole lighted candle core when carrying out the igniting experiments under the below-G conditions, there is following defective in this manual candle ignition way:
Because this experiment is as a lecture experiment, usually Laboratory Module is suspended on eminence apart from about 2 meters on ground, flame profile when observing the burning of real candle under state of weightlessness, this lecture experiment requires lighted candle under state of weightlessness, only that is to say that when Laboratory Module is done movement of falling object lighted candle can observe the candle combustion phenomenon under the real state of weightlessness, and Laboratory Module has only 0.6 second from the time that 2 meters eminence drops to ground, to realize that in the so short time manual ignition is easy to go wrong, to such an extent as to experiment is difficult to operation.
Because above-mentioned defective causes many high school physics teachers to be unwilling in the demonstration of carrying out candle igniting experiments under the state of weightlessness on the classroom, thereby cause the student understanding intuitively to be arranged to being under the state of weightlessness state of candle combustion, the operability that therefore simplify the experimental implementation process, improves experiment has become a kind of necessity.
Goal of the invention
Purpose of the present invention: the automatic controlling level height that is to provide a kind of way to solve the problems referred to above, simple to operate, weightless test apparatus for demonstrating that precision is high with computer program-control, not only can show experimental image in real time, but also can carry out computer control experiment.
The automatic ignition experiment device of candle under this weightlessness, comprise that mainly a shape is similar to the Laboratory Module 1 of aircraft, the experiment porch 3 of placing match 4 is arranged in the Laboratory Module 1, be in the camera 7 and the power supply 2 of the real time record experimental phenomena of same level height with match 4, it is characterized in that: a side of described match 4 has a heating wire 5.
The opposite side of described match 4 is provided with a closed type bimetal thermal relay 6.
On the sidewall of described Laboratory Module 1 inside dry-reed relay 12 is installed.
Described Laboratory Module 1 position relatively outside and that be lower than described dry-reed relay 12 is provided with an electromagnet 8.
Distance between described heating wire 5 and the match 4 is between 0.1-1mm.
Distance between described closed type bimetal thermal relay 6 and the match 4 is between 3-8mm.
The normally opened contact a9 series connection forming circuit A of described heating wire 5 and electromagnetic relay; After the normally opened contact b10 parallel connection of dry-reed relay 12 and electromagnetic relay 11 and the coil of closed type bimetal thermal relay 6 and the electromagnetic relay 11 forming circuit B that connects.
Described circuit A and circuit B can be the independent circuits by two power supply power supplies, also can be two branch roads by same power-supplying circuit.
Described electromagnet 8 is from the outer wall 5-10mm of Laboratory Module 1.
The coil of described electromagnet 8 is connected to power supply through control circuit.
Described control circuit is a computing machine.
Described electric battery 2 has three, and electric battery a is the supplying cell group of video camera, and electric battery b and electric battery c are respectively the supplying cell group of circuit a and circuit b.
The two ends of the coil of electromagnet 8 connect power supply by the control circuit of computing machine or PLC program controller, connection cut-out and the length of turn-on time by the control DC current, realize the automatic ignition process of candle, significantly reduced the loaded down with trivial details step of manual igniting, improved the operability of experiment.
According to the automatic ignition experiment device of candle under this weightlessness of above technical scheme design, compare with present existing weightless test education demonstrator, have the following advantages:
Realized computer program-control, by the automatic ignition process of computer realization candle, its work is accurate to Millisecond constantly, has eliminated to relate to manual step in the experimentation, has simplified the experimental implementation process, has improved the operability of experiment.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the schematic diagram of automatic some thermoelectricity of the present invention.
Among the figure: 1, Laboratory Module 2, power supply 3, experiment porch 4, match 5, heating wire 6, closed type bimetal thermal relay 7, video camera 8, electromagnet 9, normally opened contact a 10, normally opened contact b 11, electromagnetic relay 12, dry-reed relay
Embodiment
According to the automatic ignition experiment device of the candle under the weightlessness as depicted in figs. 1 and 2, controller adopts homemade CRD driver, and writes corresponding control programs on computers.When experimentizing demonstration, at first whole Laboratory Module is fixed on the eminence of 2.5m, electromagnet is installed in the outer side near dry-reed relay in the body of cabin of Laboratory Module, closely makes enough that with the distance of guaranteeing electromagnet and dry-reed relay magnetic field force can be with the dry-reed relay closure of often opening.Starting the whereabouts assembly during experiment makes the cabin body do the movement of falling object, simultaneously by sending firing command, flow by CRD driver output DC, be magnetized after the electromagnet energising, produce magnetic field, when the dry-reed relay in the body of cabin (magnetic induction switch) falls to electromagnet when enough near, the normal open switch closure of magnetic field force induced effect dry-reed relay, the circuit a that this moment, electromagnetic relay and dry-reed relay were formed forms the closed-loop path, the coil of electromagnetic relay obtains electric current, the magnetic field force that produces behind the coil electricity makes two normally opened contact a of electromagnetic relay armature and normally opened contact b closed simultaneously, normally opened contact a closure is heated heating wire, and normally opened contact b closure makes the electromagnetic relay self-locking, i.e. electromagnetic relay energising makes normally opened contact b closure, because normally opened contact b is connected in the circuit, institute is so that electromagnetic relay continues energising, and this moment, electromagnet left, and reed switch contact disconnects, because the relay self-locking, thus normally opened contact a still closure make the heating wire heating.When heating wire is heated to uniform temperature, the match on its next door is lighted, realize automatic ignition process.In order to prevent that continuing heating burns out heating wire or quicken the aging of heating wire, the closed type bimetal thermal relay is installed in the opposite side of match, behind the candle combustion certain hour, the heat of its release is enough to make the reed of the closed type bimetal thermal relay that is positioned at the match next door owing to expanded by heating disconnects, with circuitry cuts.
The present invention is by the connection cut-out and the length of turn-on time of Control Driver control DC current, realized the automatic ignition process of the candle under the weightlessness, significantly reduced the loaded down with trivial details step of manual igniting, simplified manual step in the experiment, realize the robotization control of experiment, improved the operability and the authenticity of experiment.Because the weightless test apparatus for demonstrating of Popular Science Education activity is carried out in places such as it is simple to operate, the automatic ignition experiment device of candle under high this below-G conditions of precision also can be used for science and technology center.
In addition; the present invention is not only applicable to the candle automatic ignition device; for other similar automatic ignition devices,, also belong to protection scope of the present invention as long as adopted heating wire, closed type bimetal thermal relay and electromagnetic relay to realize and to light a fire automatically and to disconnect.
Claims (12)
1, the automatic ignition experiment device of candle under a kind of weightlessness, comprise that mainly a shape is similar to the Laboratory Module of aircraft (1), the experiment porch (3) that placement match (4) are arranged in the Laboratory Module (1), be in the camera (7) and the power supply of the real time record experimental phenomena of same level height with match (4), it is characterized in that: a side of described match (4) has a heating wire (5).
2, the automatic ignition experiment device of candle under the weightlessness according to claim 1 is characterized in that: the opposite side of described match (4) is provided with a closed type bimetal thermal relay (6).
3, the automatic ignition experiment device of candle under the weightlessness according to claim 1 is characterized in that: on the sidewall of described Laboratory Module (1) inside dry-reed relay (12) is installed.
4, according to the automatic ignition experiment device of candle under claim 1 or the 3 described weightlessnesses, it is characterized in that: described Laboratory Module (1) outside, relatively and the position that is lower than described dry-reed relay (12) be provided with an electromagnet (8).
5, the automatic ignition experiment device of candle under the weightlessness according to claim 1 is characterized in that: the distance between described heating wire (5) and the match (4) is between 0.1-1mm.
6, the automatic ignition experiment device of candle under the weightlessness according to claim 2 is characterized in that: the distance between described closed type bimetal thermal relay (6) and the match (4) is between 3-8mm.
7, according to the automatic ignition experiment device of candle under claim 1 or the 2 or 3 described weightlessnesses, it is characterized in that: normally opened contact a (9) the series connection forming circuit A of described heating wire (5) and electromagnetic relay; The coil of the normally opened contact b (10) of dry-reed relay (12) and electromagnetic relay (11) back in parallel and closed type bimetal thermal relay (6) and electromagnetic relay (11) the forming circuit B that connects.
8, the automatic ignition experiment device of candle under the weightlessness according to claim 7 is characterized in that: described circuit A and circuit B can be the independent circuits by two power supply power supplies, also can be two branch roads by same power-supplying circuit.
9, the automatic ignition experiment device of candle under the weightlessness according to claim 3, it is characterized in that: described electromagnet (8) is from the outer wall 5-10mm of Laboratory Module (1).
10, the automatic ignition experiment device of candle under the weightlessness according to claim 3, it is characterized in that: the coil of described electromagnet (8) is connected to power supply through control circuit.
11, the automatic ignition experiment device of candle under the weightlessness according to claim 10, it is characterized in that: described control circuit is a computing machine.
12, the automatic ignition experiment device of candle under the weightlessness according to claim 10, it is characterized in that: described control circuit is the PLC program controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810034652 CN101533576A (en) | 2008-03-14 | 2008-03-14 | Experimental device for candle self-ignition under weightlessness condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810034652 CN101533576A (en) | 2008-03-14 | 2008-03-14 | Experimental device for candle self-ignition under weightlessness condition |
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| Publication Number | Publication Date |
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| CN101533576A true CN101533576A (en) | 2009-09-16 |
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| CN 200810034652 Pending CN101533576A (en) | 2008-03-14 | 2008-03-14 | Experimental device for candle self-ignition under weightlessness condition |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135357A (en) * | 2015-09-10 | 2015-12-09 | 无锡万象工业设计有限公司 | Novel remote-control laser ignition type lighting cup |
| CN105243931A (en) * | 2015-11-06 | 2016-01-13 | 合肥工业大学 | Solid fuel combustion experimental device based on variable gravity condition |
-
2008
- 2008-03-14 CN CN 200810034652 patent/CN101533576A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135357A (en) * | 2015-09-10 | 2015-12-09 | 无锡万象工业设计有限公司 | Novel remote-control laser ignition type lighting cup |
| CN105243931A (en) * | 2015-11-06 | 2016-01-13 | 合肥工业大学 | Solid fuel combustion experimental device based on variable gravity condition |
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Open date: 20090916 |