CN104134313A - Selective alarm based on magnetorheological fluid - Google Patents
Selective alarm based on magnetorheological fluid Download PDFInfo
- Publication number
- CN104134313A CN104134313A CN201410093330.XA CN201410093330A CN104134313A CN 104134313 A CN104134313 A CN 104134313A CN 201410093330 A CN201410093330 A CN 201410093330A CN 104134313 A CN104134313 A CN 104134313A
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- Prior art keywords
- alarm
- magnetorheological fluid
- fluid
- flow liquid
- shaft frame
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- Granted
Links
- 239000012530 fluid Substances 0.000 title abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract 2
- 239000007788 liquid Substances 0.000 claims description 28
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000010008 shearing Methods 0.000 abstract description 9
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Alarm Systems (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention relates to a selective alarm based on magnetorheological fluid, which is used for keeping order in a playground for children and ensuring safety of the children. The device is composed of a flat plate, a sealing circle, a shaft frame, the magnetorheological fluid, electromagnetic coins, an isolator, volume compensators, delay switching contacts, reset springs and a shell. When the electromagnetic coins are energized, magnetic circuits are generated in the shell, the shaft frame and the gap, and thus the magnetorheological fluid is converted to a high-viscosity and low-liquidity Bingham fluid from the original Newton fluid. The shaft frame is fixed inside the shell. When enough pressure (larger than the shearing force of the magnetorheological fluid) is applied to the flat plate, the shaft frame begins to move downwardly until to be contacted with the delay switching contact, and an alarm is given. Through adjusting the magnitude of current passing through the electromagnetic coins, the shearing force of the magnetorheological fluid can enable a child to pass through without giving an alarm and an alarm is given when an adult passes. The device selectively gives an alarm through changing the magnitude of the current, and intelligence of the alarm can be realized.
Description
Technical field
The present invention relates to a kind of alarm device, especially relate to a kind of selectivity alarm device based on magnetic flow liquid.
Background technology
Along with improving constantly of people's living standard, the various sight spots in every vacation amusement park have all been covered with children, make like this those lawless persons have an opportunity to take advantage of, and children loss event occurs often.Existing alarm has multiple, such as alarm for car (police car, ambulance), safety cabinet alarm, antitheft door alarm device.But not yet there is the special alarm for children that is arranged on the specific sight spot of recreation ground.Main cause is the restriction that this professional alarm is subject to the many factors such as installing mechanism, warning intensity and sensitivity, durability and production cost.For the place security needs that guarantees to assemble as children such as recreation grounds, producing alarm easy for installation, alarm reliability is strong and cheap has become the task of top priority.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of easy for installation, alarm reliability is strong and cheap, thereby can send reliably hydropac in the public place of children special-purpose, guarantee the alarm of children's safety.
In order effectively to solve the deficiency as above of alarm, the present invention realizes as follows: this device is by flat board, O-ring seal, pedestal, magnetic flow liquid, solenoid, isolator, pressurizer, postpone conversion contact, back-moving spring, housing forms.When solenoid is switched on, in housing, pedestal and the gap between them, produce magnetic circuit, thereby produce magnetic field around at magnetic flow liquid, magnetic flow liquid moment is magnetized, make magnetic flow liquid by original Newtonian fluid, be changed into the Bingham fluid of high viscosity, lazy flow, make pedestal be fixed on enclosure interior.When applying enough pressure (being greater than the shearing force of magnetic flow liquid) on flat board, pedestal starts to move downward, until postpone conversion contact contact, gives the alarm.Adjusting, by the size of solenoid current, can change the shearing force size of magnetic flow liquid.When making to be enough to allow the size of magnetic flow liquid shearing force be greater than a children's weight by the size of current in solenoid, children are passed through smoothly.And when an adult by time, owing to being applied to gravity on flat board and being greater than the shearing force of magnetic flow liquid, force pedestal to move downward, postpone conversion contact contact and give the alarm.This device gives the alarm selectively by the size of current that changes self, realize alarm precision, intellectuality, can control.
The good effect of a kind of selectivity alarm based on magnetic flow liquid of the present invention is: utilize hot-wire coil can produce magnetic field, and magnetic flow liquid its rheological characteristics in magnetic field can change in moment, make magnetic flow liquid by original New ton fluid, be changed into the Bingham fluid of high viscosity, lazy flow, this is continuous, a reversible process.By changing the large I of electric current, realize the electrodeless adjusting of magnetic flow liquid shearing force, thereby meet the warning requirement of different places.The effect of pressurizer is the volume change producing in isolator while moving because of time delay conversion contact in order to compensate.Magnetic flow liquid volume required in whole device only has 7mL, and the structure of whole device is very compact, and rapidly, reliability is high in response, and cost is official just.
Accompanying drawing explanation
Figure is the inner structure schematic diagram of alarm
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in more detail.
In the drawings, a kind of selectivity alarm apparatus based on magnetic flow liquid of the present invention, its inner structure is comprised of flat board 1, O-ring seal 2, pedestal 3, magnetic flow liquid 4, solenoid 5, isolator 7, pressurizer 8, delay conversion contact 9, back-moving spring 10, housing 11.Magnetic flow liquid 4 riddles between housing 11, pedestal 3 and isolator 7, by O-ring seal 2, seals, and solenoid 5 is on pedestal 3, and isolator 7 inside are provided with pressurizer 8.
Solenoid 5 is in "on" position, in housing 11, pedestal 3 and the gap between them 6, produce magnetic circuit 12, thereby produce magnetic field around at magnetic flow liquid 4,4 moments of magnetic flow liquid are magnetized, make magnetic flow liquid 4 by original Newtonian fluid, be changed into the Bingham fluid of high viscosity, lazy flow, make pedestal 3 be fixed on housing 11 inside.Regulate by the size of current of solenoid 5, when the weight that makes size of current by 5 li of solenoids be enough to allow the size of magnetic flow liquid 4 shearing forces be greater than children is less than an adult's weight, children pass through smoothly, and when an adult passes through, owing to being applied to gravity on dull and stereotyped 1 and being greater than the shearing force of magnetic flow liquid 4, force pedestal 3 to move downward, make to postpone conversion contact 9 contacts, now solenoid 5 power-off, alarm is switched on and is given the alarm.And pressurizer 8 has just in time compensated the volume change producing in isolator 7 while moving because of time delay conversion contact 9.When solenoid 5 power-off, magnetic flow liquid 4 changes the Newtonian fluid of low viscosity, high fluidity into from Bingham fluid, effect due to back-moving spring 10, pedestal 3 is reset to original position, solenoid 5 time delays (pedestal 3 is from rubber contact 9 contact positions to original position required time) energising, waits for next time and reporting to the police.
Claims (2)
1. the selectivity alarm based on magnetic flow liquid, this device is comprised of flat board, O-ring seal, pedestal, magnetic flow liquid, solenoid, isolator, pressurizer, time delay conversion contact, back-moving spring, housing.It is characterized in that: magnetic flow liquid (4) riddles between housing (11), pedestal (3) and isolator (7), by O-ring seal (2) sealing, solenoid (5) is on pedestal (3).
2. a kind of selectivity alarm apparatus based on magnetic flow liquid as claimed in claim 1, is characterized in that: isolator (7) inside is provided with pressurizer (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410093330.XA CN104134313B (en) | 2014-03-09 | 2014-03-09 | A kind of selectivity alarm based on magnetic flow liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410093330.XA CN104134313B (en) | 2014-03-09 | 2014-03-09 | A kind of selectivity alarm based on magnetic flow liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104134313A true CN104134313A (en) | 2014-11-05 |
| CN104134313B CN104134313B (en) | 2017-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410093330.XA Active CN104134313B (en) | 2014-03-09 | 2014-03-09 | A kind of selectivity alarm based on magnetic flow liquid |
Country Status (1)
| Country | Link |
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| CN (1) | CN104134313B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104992216A (en) * | 2015-07-01 | 2015-10-21 | 孙美娜 | Magnetorheological-effect-based piezoelectric-pulse-counting flow density detection apparatus |
| CN106678257A (en) * | 2017-01-24 | 2017-05-17 | 东南大学 | Volume compensation isolation type single rod magneto-rheological damper |
| CN108380786A (en) * | 2018-04-12 | 2018-08-10 | 青岛理工大学 | Intelligent overload protection device for press machine and control method |
| CN109638987A (en) * | 2019-01-10 | 2019-04-16 | 深圳大学 | A kind of wireless charging system detection device of metal foreign body and method |
| CN111969373A (en) * | 2020-08-19 | 2020-11-20 | 夏豪 | Time delay is earthing plug for break-make |
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| CN101126430A (en) * | 2007-09-18 | 2008-02-20 | 重庆大学 | Parallel type vibration isolation buffer based on magneto-rheological technology |
| CN101324500A (en) * | 2008-07-11 | 2008-12-17 | 重庆大学 | Method and apparatus for detecting magnetic rheology and fluid rheology characteristics |
| US20110181405A1 (en) * | 2008-04-29 | 2011-07-28 | Comm. A L'ener. Atom. Et Aux Energies Alt. | Force feedback interface with improved sensation |
| CN102777516A (en) * | 2012-08-01 | 2012-11-14 | 林智勇 | Magnetic fluid braking device |
| CN203120160U (en) * | 2013-02-27 | 2013-08-07 | 北京英维思科技有限公司 | Positioning system |
| CN203773691U (en) * | 2014-03-09 | 2014-08-13 | 浙江师范大学 | Selective alarm device based on magnetorheological fluid |
-
2014
- 2014-03-09 CN CN201410093330.XA patent/CN104134313B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126430A (en) * | 2007-09-18 | 2008-02-20 | 重庆大学 | Parallel type vibration isolation buffer based on magneto-rheological technology |
| US20110181405A1 (en) * | 2008-04-29 | 2011-07-28 | Comm. A L'ener. Atom. Et Aux Energies Alt. | Force feedback interface with improved sensation |
| CN101324500A (en) * | 2008-07-11 | 2008-12-17 | 重庆大学 | Method and apparatus for detecting magnetic rheology and fluid rheology characteristics |
| CN102777516A (en) * | 2012-08-01 | 2012-11-14 | 林智勇 | Magnetic fluid braking device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104992216A (en) * | 2015-07-01 | 2015-10-21 | 孙美娜 | Magnetorheological-effect-based piezoelectric-pulse-counting flow density detection apparatus |
| CN104992216B (en) * | 2015-07-01 | 2017-09-29 | 张广 | The density of stream of people detection means that piezoelectric pulses based on magnetic rheology effect are counted |
| CN106678257A (en) * | 2017-01-24 | 2017-05-17 | 东南大学 | Volume compensation isolation type single rod magneto-rheological damper |
| CN106678257B (en) * | 2017-01-24 | 2018-07-06 | 东南大学 | A kind of volume compensation is isolated singly to go out pole magnetorheological damper |
| CN108380786A (en) * | 2018-04-12 | 2018-08-10 | 青岛理工大学 | Intelligent overload protection device for press machine and control method |
| CN108380786B (en) * | 2018-04-12 | 2024-01-19 | 青岛理工大学 | Intelligent overload protection device of press and control method |
| CN109638987A (en) * | 2019-01-10 | 2019-04-16 | 深圳大学 | A kind of wireless charging system detection device of metal foreign body and method |
| CN111969373A (en) * | 2020-08-19 | 2020-11-20 | 夏豪 | Time delay is earthing plug for break-make |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104134313B (en) | 2017-03-08 |
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Effective date of registration: 20231009 Address after: B205, No.179 Chezhan Road, Liushi Town, Leqing City, Wenzhou City, Zhejiang Province, 325600 Patentee after: Zhipu Qiwang (Wenzhou) Electric Power Technology Research Institute Co.,Ltd. Address before: 321004 688 Yingbin Road, Zhejiang, Jinhua, Zhejiang Normal University Patentee before: ZHEJIANG NORMAL University |
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