CN104993678A - Design process of integrated power supply of light ionized gas alarm device - Google Patents
Design process of integrated power supply of light ionized gas alarm device Download PDFInfo
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- CN104993678A CN104993678A CN201510461465.1A CN201510461465A CN104993678A CN 104993678 A CN104993678 A CN 104993678A CN 201510461465 A CN201510461465 A CN 201510461465A CN 104993678 A CN104993678 A CN 104993678A
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Abstract
The invention provides a design process of an integrated power supply of a light ionized gas alarm device, relating to the technical field of alarm devices. In order to reduce the volume and power consumption of a power supply module, a double-ended push-pull self-excited amplification circuit is designed, and +5V voltage is converted into two voltages needed by a gas detection unit. The design process has the advantages of simple structure, strong operability and low energy consumption.
Description
Technical field
The present invention relates to alarm technical field, be specifically related to a kind of design technology of integrated power supply of photoionization gas alarm instrument.
Background technology
Portable PID alarm main circuit will comprise the following aspects:
(1) control section, this part is by C8051F040 chip microcontroller, comprises the access facility of photoionization signal and battery electric quantity signals collecting, data processing, CF and alarming value and the function such as the dynamic management of power supply and control;
(2) signal condition part, this part mainly comprises the analogue signal circuit before the A/D samplings such as the extraction of photoionization signal, amplification and filtering;
(3) data storage section, this part is the access circuit of PID alarm CF value and alarm;
(4) button is reported to the police and display section, and this part comprises key circuit, sound light alarming circuit and digital-scroll technique circuit;
(5) power management section, this part mainly comprises, battery and charge-discharge circuit, battery protecting circuit, voltage conversion circuit and detection of gas unit integral circuit.
PID detection of gas unit needs 200V DC offset voltage and uviol lamp radio-frequency driven high pressure, and these two voltages cannot realize by special voltage conversion chip.
Summary of the invention
The object of this invention is to provide a kind of design technology of integrated power supply of photoionization gas alarm instrument, it is for reducing volume and the power consumption of power module, devise a kind of both-end push-pull type the self-oscillation amplifying circuit, the two kinds of voltages becoming detection of gas unit to need+5V a voltage transitions.
In order to solve the problem existing for background technology, the present invention is by the following technical solutions:
The design technology of the integrated power supply of photoionization gas alarm instrument, is characterized in that comprising following steps:
When there being+5V voltage to be added in this drive circuit, now no current in feedback coil W3 ,+5V voltage makes Q3 conducting by R1;
During Q3 conducting, produce the electric current increased gradually at primary coil W1B, this electric current makes to induce an electromotive force in W3, and this electromotive force will be closed Q3 and be opened Q4;
And when Q4 conducting, the electric current reversing increased in W1A by the electromotive force of W3, thus closes Q4, open Q3;
Q3 and Q4 periodically opens closedown with the difference of 180 °, and the generation alternating current thus in primary coil W1, this alternating current is exaggerated in secondary coil W2, thus W2B exports a radio frequency high tension is used for driving uviol lamp, the radio frequency high tension that W2A exports is used for producing HVB high voltage bias electric field after halfwave rectifier, filtering;
Electric capacity C37 between Q3 and Q4 base stage determines the speed that Q3 and Q4 opens and closes, and it controls frequency of oscillation, i.e. the frequency of radio-frequency voltage.
When direct current 5V powers, produce about 300V ac high-voltage and the direct current (DC) bias 200V of frequency 50kHz, in this drive circuit, device parameters is: C37 is that 0.1uF high frequency magnetic dielectric is held, transformer coil turn ratio W1A:W1B:W2A:W2B:W3=1:1:120:80:1.D5 adopts high-frequency and high-voltage rectifier diode RGP02, and C38 is 10nF high-frequency and high-voltage filter capacitor.
The advantage that the present invention has: structure is simple, and workable, energy consumption is low.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention.
Embodiment
With reference to Fig. 1, the design technology of the integrated power supply of photoionization gas alarm instrument, is characterized in that comprising following steps:
When there being+5V voltage to be added in this drive circuit, now no current in feedback coil W3 ,+5V voltage makes Q3 conducting by R1;
During Q3 conducting, produce the electric current increased gradually at primary coil W1B, this electric current makes to induce an electromotive force in W3, and this electromotive force will be closed Q3 and be opened Q4;
And when Q4 conducting, the electric current reversing increased in W1A by the electromotive force of W3, thus closes Q4, open Q3;
Q3 and Q4 periodically opens closedown with the difference of 180 °, and the generation alternating current thus in primary coil W1, this alternating current is exaggerated in secondary coil W2, thus W2B exports a radio frequency high tension is used for driving uviol lamp, the radio frequency high tension that W2A exports is used for producing HVB high voltage bias electric field after halfwave rectifier, filtering;
Electric capacity C37 between Q3 and Q4 base stage determines the speed that Q3 and Q4 opens and closes, and it controls frequency of oscillation, i.e. the frequency of radio-frequency voltage.
When direct current 5V powers, produce about 300V ac high-voltage and the direct current (DC) bias 200V of frequency 50kHz, in this drive circuit, device parameters is: C37 is that 0.1uF high frequency magnetic dielectric is held, transformer coil turn ratio W1A:W1B:W2A:W2B:W3=1:1:120:80:1, D5 adopts high-frequency and high-voltage rectifier diode RGP02, and C38 is 10nF high-frequency and high-voltage filter capacitor.
Claims (2)
1. the design technology of the integrated power supply of photoionization gas alarm instrument, is characterized in that comprising following steps:
When there being+5V voltage to be added in this drive circuit, now no current in feedback coil W3 ,+5V voltage makes Q3 conducting by R1;
During Q3 conducting, produce the electric current increased gradually at primary coil W1B, this electric current makes to induce an electromotive force in W3, and this electromotive force will be closed Q3 and be opened Q4;
And when Q4 conducting, the electric current reversing increased in W1A by the electromotive force of W3, thus closes Q4, open Q3;
Q3 and Q4 periodically opens closedown with the difference of 180 °, and the generation alternating current thus in primary coil W1, this alternating current is exaggerated in secondary coil W2, thus W2B exports a radio frequency high tension is used for driving uviol lamp, the radio frequency high tension that W2A exports is used for producing HVB high voltage bias electric field after halfwave rectifier, filtering;
Electric capacity C37 between Q3 and Q4 base stage determines the speed that Q3 and Q4 opens and closes, and it controls frequency of oscillation, i.e. the frequency of radio-frequency voltage.
2. the design technology of the integrated power supply of photoionization gas alarm instrument according to claim 1, it is characterized in that when direct current 5V powers, produce about 300V ac high-voltage and the direct current (DC) bias 200V of frequency 50kHz, in this drive circuit, device parameters is: C37 is that 0.1uF high frequency magnetic dielectric is held, transformer coil turn ratio W1A:W1B:W2A:W2B:W3=1:1:120:80:1, D5 adopts high-frequency and high-voltage rectifier diode RGP02, and C38 is 10nF high-frequency and high-voltage filter capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510461465.1A CN104993678A (en) | 2015-07-31 | 2015-07-31 | Design process of integrated power supply of light ionized gas alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510461465.1A CN104993678A (en) | 2015-07-31 | 2015-07-31 | Design process of integrated power supply of light ionized gas alarm device |
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| CN104993678A true CN104993678A (en) | 2015-10-21 |
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| CN201510461465.1A Pending CN104993678A (en) | 2015-07-31 | 2015-07-31 | Design process of integrated power supply of light ionized gas alarm device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11196581A (en) * | 1997-12-26 | 1999-07-21 | Toko Inc | Self-excited push-pull power supply circuit |
| JP2003309972A (en) * | 2002-04-12 | 2003-10-31 | Toko Inc | Self-excited switching power supply |
| CN102082526A (en) * | 2010-12-24 | 2011-06-01 | 广州金升阳科技有限公司 | Self-exited push-pull converter |
| CN102299658A (en) * | 2011-07-18 | 2011-12-28 | 广州金升阳科技有限公司 | Self-excited push-pull converter |
| CN203522544U (en) * | 2013-11-01 | 2014-04-02 | 广州市爱浦电子科技有限公司 | Low-noise self-excited push-pull converter |
-
2015
- 2015-07-31 CN CN201510461465.1A patent/CN104993678A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11196581A (en) * | 1997-12-26 | 1999-07-21 | Toko Inc | Self-excited push-pull power supply circuit |
| JP2003309972A (en) * | 2002-04-12 | 2003-10-31 | Toko Inc | Self-excited switching power supply |
| CN102082526A (en) * | 2010-12-24 | 2011-06-01 | 广州金升阳科技有限公司 | Self-exited push-pull converter |
| CN102299658A (en) * | 2011-07-18 | 2011-12-28 | 广州金升阳科技有限公司 | Self-excited push-pull converter |
| CN203522544U (en) * | 2013-11-01 | 2014-04-02 | 广州市爱浦电子科技有限公司 | Low-noise self-excited push-pull converter |
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Application publication date: 20151021 |
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| RJ01 | Rejection of invention patent application after publication |