CN1167933A - Microcomputer automatic demagnetiser - Google Patents
Microcomputer automatic demagnetiser Download PDFInfo
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- CN1167933A CN1167933A CN 96107849 CN96107849A CN1167933A CN 1167933 A CN1167933 A CN 1167933A CN 96107849 CN96107849 CN 96107849 CN 96107849 A CN96107849 A CN 96107849A CN 1167933 A CN1167933 A CN 1167933A
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- microprocessor
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Abstract
A microcomputerized automatic demagnetizer is composed of serially connected AC power supply, demag netizing coil, control switch circuit of power supply and current attenuator, and features use of a microprocessor, which receives the magneto-disturbing and demagnetizing time settings output from timing circuit and the conducting signal to start switch circuit. In the magneto-distrubing time setting, AC current flows through demagnetizing coil to generate magnetic field to disturb the residual magnetism. After the magnoto-disturbing time escapes, the attenuator is started to attenuate the current flowing through demagnetizing coil to zero, making the residual magnetism zero.
Description
The present invention relates to a kind of demagnetizer, particularly relate to a kind of microcomputer automatic demagnetiser (microcomputer automatic demagnetizer).
In monitor (Monitor) production run, because of manufacturer for a long time with the demagnetization rod as the tool of production, waste time and energy in the use, and the artificial stability degree is not enough, cause quality inconsistent easily.
And charging/discharging type demagnetizer in the past can't be clean with the complete demagnetization in dead angle on the monitor case (Monitorshielding Housing), can only do and closely connect demagnetization, and the demagnetization size is only on 14 cun monitors.
Fundamental purpose of the present invention is to be to provide a kind of microcomputer automatic demagnetiser, to increase the effect of demagnetization.
The present invention is characterized in: with a microprocessor is core, connects a sequential initialization circuit (time setting circuit) and a starting switch circuit (activatingswitch circuit) respectively; And this microprocessor and a power control switch circuit (power con-trol switch circuit) and a current attenuation circuit (current limiting circuit) constitute a loop; And this power control switch circuit connects anti-magnetized coil to an AC power supplies in addition; Wherein, have a demagnetization program in this microprocessor, scratch magnetic time set value and erasing time setting value with what accept the output of above-mentioned sequential initialization circuit, and accept above-mentioned starting switch circuit turn-on, to export a control signal, the above-mentioned power control switch circuit of conducting; At this moment, AC power supplies is just through above-mentioned anti-magnetized coil, the magnetic field of magnetic is scratched in generation one in the magnetic time of setting of scratching (magnetism disturbing-time), to scratch the residual magnetism in this magnetic field, and scratching the above-mentioned current attenuation circuit of magnetic time end back startup, the flow through magnitude of current to zero peace of this anti-magnetized coil of descending decay is amassed wealth by heavy taxation, and the residual magnetism of being scratched in this magnetic field is brought into zero magnetic field, reaches the demagnetization purpose.
The present invention is described in detail below in conjunction with drawings and Examples:
Fig. 1 is the circuit block diagram of preferred embodiment of the present invention.
Fig. 2 is the operational flowchart of the interior demagnetization formula of microprocessor among Fig. 1.
Fig. 3 is the detailed circuit diagram of a preferred embodiment of power control switch circuit among Fig. 1.
Fig. 4 is the synoptic diagram that residual magnetism that the present invention will be scratched is brought zero magnetic field into.
Fig. 5 is a preferred embodiment detailed circuit diagram of current attenuation circuit among Fig. 1.
As shown in Figure 1, microcomputer automatic demagnetiser of the present invention is to be core with a microprocessor 1, connect a sequential initialization circuit 2 and a starting switch circuit 3 respectively, and this microprocessor 1 and a power control switch circuit 4 and a current attenuation circuit 5 constitute a loop, and this power control switch circuit 4 connects an anti-magnetized coil 6 to one AC power supplies 7.
Wherein, in above-mentioned microprocessor 1, has a demagnetization program, its process flow diagram as shown in Figure 2, after this demagnetization program is activated, what above-mentioned microprocessor 1 will be accepted 2 outputs of above-mentioned sequential initialization circuit scratches magnetic time set value and erasing time setting value, and detect above-mentioned opening and advise whether conducting of on-off circuit 3, and export a Continuity signal to above-mentioned power control switch circuit 4 at the state of these starting switch circuit 3 conductings, see also shown in Figure 3 again, in this preferred embodiment, this power control switch circuit 4 is with a solid-state relay (Solid-StateRelay; SSR) reach, when this SSR receives the Continuity signal of microprocessor 1 input, its out-put supply AC2=input power supply AC1, otherwise, out-put supply AC2=0, above-mentioned input power supply AC1 is the out-put supply of above-mentioned anti-magnetized coil 6.
And when above-mentioned power control switch circuit 4 conductings, the electric current that AC power supplies 7 flows out is just through above-mentioned anti-magnetized coil 6, produce a magnetic field of scratching magnetic at microprocessor 1 in time from the magnetic of scratching that sequential initialization circuit 2 receives, to scratch the residual magnetism in this magnetic field, and scratching the above-mentioned current attenuation circuit 5 of magnetic time end back startup, descending decay is flowed through the magnitude of current of this anti-magnetized coil 6 to zero ampere, (symbol B represents magnetic flux among the figure as shown in Figure 4, H represents magnetic field intensity), bring zero magnetic field into the residual magnetism 8 of will scratched in this magnetic field, reach the demagnetization purpose.
One preferred embodiment of above-mentioned current attenuation circuit 5 comprises a rectification circuit (rectifying circuit) 50 that is connected with this power control switch circuit as shown in Figure 5; And the RC circuit 51 of these rectification circuit 50 series connection in parallel and the relay switch 52 that is subjected to microprocessor 1 control, when carrying out demagnetization, microprocessor 1 will excitatory this relay switch 52 to NO (normal open) position, with the capacitor C place in circuit, make input current Iin from large to small, last near zero ampere (zero ampere).Microprocessor 1 just with these relay switch 52 degaussings, makes this relay switch 52 get back to NC (normal close) position when learning Iin=0, and capacitor C is just through the resistance R discharge, in order to action next time.
By above-mentioned structure and means as can be known, microcomputer automatic demagnetiser of the present invention really can Increase demagnetization purpose and effect, and have following advantage: 1. with the monitor of anti-magnetized coil of the present invention near demagnetization, what make anti-magnetized coil scratches magnetic magnetic field Contain whole monitor, just the residual magnetism in each corner on this monitor can be brought into after scratching magnetic Zero magnetic field and demagnetization, to guarantee excitation, the look convergence on the monitor fluorescent screen, not can because of Monitor magnetic and is affected quality. 2. the stable raising because of the thorough demagnetization of monitor, its efficiency more can make monitor produce Amount increases. 3. utilize the microcomputerized control programmable erasing time, more can arrive demagnetization 14-21 inch size Monitor.
Claims (3)
1. a microcomputer automatic demagnetiser comprises an AC power supplies that is connected in series, anti-magnetized coil, power control switch circuit, reaches the current attenuation circuit;
It is characterized in that: more comprise a microprocessor, connect a sequential initialization circuit and a starting switch circuit respectively; And this microprocessor and above-mentioned power control switch circuit and above-mentioned current attenuation circuit constitute a loop; Wherein, has a demagnetization program in this microprocessor, scratch magnetic time set value and erasing time setting value with what accept the output of above-mentioned sequential initialization circuit, and accept above-mentioned starting switch circuit turn-on, to export the above-mentioned power control switch circuit of a control signal conducting; At this moment, the AC electric current is just through above-mentioned anti-magnetized coil, produce a magnetic field of scratching magnetic in time at the magnetic of setting of scratching, to scratch the residual magnetism in this magnetic field, and scratching the above-mentioned current attenuation circuit of magnetic time end back startup, descending decay is flowed through the magnitude of current of this anti-magnetized coil to zero ampere, the residual magnetism of being scratched in this magnetic field is brought into zero magnetic field, reaches with the demagnetization purpose.
2. microcomputer automatic demagnetiser as claimed in claim 1 is characterized in that: this power control switch circuit is a solid-state relay that controlled by microprocessor, is connected between above-mentioned anti-magnetized coil and the above-mentioned current attenuation circuit.
3. microcomputer automatic demagnetiser as claimed in claim 1 is characterized in that: this current attenuation circuit comprises a rectification circuit that is connected with this power control switch circuit; And the RC circuit of this rectification circuit series connection in parallel and the relay switch that is subjected to microprocessor control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96107849 CN1167933A (en) | 1996-06-11 | 1996-06-11 | Microcomputer automatic demagnetiser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96107849 CN1167933A (en) | 1996-06-11 | 1996-06-11 | Microcomputer automatic demagnetiser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1167933A true CN1167933A (en) | 1997-12-17 |
Family
ID=5119807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96107849 Pending CN1167933A (en) | 1996-06-11 | 1996-06-11 | Microcomputer automatic demagnetiser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1167933A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100438636C (en) * | 2005-09-14 | 2008-11-26 | 深圳创维－Rgb电子有限公司 | Time-controlling and magnetism-eliminating device |
| CN103106610A (en) * | 2013-01-31 | 2013-05-15 | 张春光 | Method and system for personal self-help shopping |
| CN107251672A (en) * | 2015-02-24 | 2017-10-13 | 特许机器株式会社 | Active eraser system |
| CN108933015A (en) * | 2018-07-20 | 2018-12-04 | 深圳普诺玛商业安全设备有限公司 | The control method of degaussing circuit, demagnetizer and degaussing circuit |
-
1996
- 1996-06-11 CN CN 96107849 patent/CN1167933A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100438636C (en) * | 2005-09-14 | 2008-11-26 | 深圳创维－Rgb电子有限公司 | Time-controlling and magnetism-eliminating device |
| CN103106610A (en) * | 2013-01-31 | 2013-05-15 | 张春光 | Method and system for personal self-help shopping |
| CN103106610B (en) * | 2013-01-31 | 2016-01-13 | 张春光 | A kind of personal self-aid purchase method and system |
| CN107251672A (en) * | 2015-02-24 | 2017-10-13 | 特许机器株式会社 | Active eraser system |
| CN108933015A (en) * | 2018-07-20 | 2018-12-04 | 深圳普诺玛商业安全设备有限公司 | The control method of degaussing circuit, demagnetizer and degaussing circuit |
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| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |