CN2244193Y - Ultramicro methane detecting and warning instrument - Google Patents

Ultramicro methane detecting and warning instrument Download PDF

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Publication number
CN2244193Y
CN2244193Y CN 95239894 CN95239894U CN2244193Y CN 2244193 Y CN2244193 Y CN 2244193Y CN 95239894 CN95239894 CN 95239894 CN 95239894 U CN95239894 U CN 95239894U CN 2244193 Y CN2244193 Y CN 2244193Y
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China
Prior art keywords
resistance
connect
amplifier
casing
capacitor
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Expired - Fee Related
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CN 95239894
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Chinese (zh)
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尹加平
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Individual
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Individual
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Priority to CN 95239894 priority Critical patent/CN2244193Y/en
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Abstract

The utility model relates to an ultramicro methane detecting and warning instrument, which mainly comprises a casing, an alarm circuit, a digital display and a battery. The utility model also comprises an electronic switch which is composed of a membrane switch double D trigger and a transistor, the middle lower part of a casing is provided with a nameplate, the middle upper part is provided with a display window, the left upper end is provided with an air intake adjusting screw and the right upper end is provided with an alarm window. A part among a sensor in the upper part of the casing, a buzzer and an instrument core is provided with a sealing ring. The ultramicro methane detecting and warning instrument has the advantages of good sealing property, compact structure, small volume, light weight, convenient carrying, stability and reliability; the utility model is capable of working in normal condition with bad environment.

Description

The superminiature methane detection alarming instrument
The utility model relates to a kind of detection alarm instrument.
Methane (gas) concentration of underground labour in order to understand the down-hole at any time in present colliery, the methane warning instrument of carrying is made up of casing, electronic warning circuit, digital indicator, battery.The power switch of methane warning instrument adopts and turns round sub-switch, sealing effectiveness is bad, and at the underground work scene, the frequent cisco unity malfunction of methane warning instrument because the reference voltage source oneself power consumption in the alarm circuit is big, and makes the alarm volume bigger.
The purpose of this utility model is to provide that a kind of power consumption is little, the methane detection alarming instrument of good sealing effect.
The purpose of this utility model is achieved in that the methane warning instrument mainly comprises casing, electronic warning circuit, digital display device, battery.Also comprise power switch, power switch is that the end by thin film switch is connected with anode, diode cathode, pliotron emitter, the other end of thin film switch is connected the other end ground connection of parallel resistor, electric capacity with a trigger end of a parallel resistor and electric capacity and double D trigger.Another trigger end of double D trigger is connected with its negative output terminal; Positive output end is connected with the base stage of preposition triode.Preposition transistor emitter ground connection, collector is connected with the pliotron base stage by resistance.The current collection of pliotron is the power supply positive output end very, is connected with each power supply positive input terminal in the electronic warning circuit.Reference voltage source is connected with each amplifier input terminal in the electronic warning circuit.
In the such scheme, owing to adopted diaphragm electric switch to improve the sealing property of methane warning instrument, make it can be than operate as normal under the rugged environment.Owing to adopted the low-power consumption reference voltage source, make the precision of methane warning instrument improve the reliability increase, also because power consumption reduces, selected chip components and parts for use simultaneously, methane warning instrument volume is reduced, help more carrying.This methane warning instrument compact conformation, little, in light weight, the stable performance, reliable of volume.
Be further described in conjunction with the embodiments with reference to the accompanying drawings below.
Fig. 1 superminiature methane detection alarming instrument structural drawing.
Fig. 2 superminiature methane detection alarming instrument right view.
Fig. 3 superminiature methane detection alarming instrument electrical schematic diagram.
Employed integrated circuit model is in the utility model: IC 1LM385, IC 2LM324, IC 3ICL7660, IC 4ICL7107, IC 5ICL4013.
In the accompanying drawing 1,2, in methane warning instrument outside, nameplate (1) is installed in instrument fore shell (9) middle and lower part, and the middle and upper part is provided with display window (2), and left upper end is installed into gas gauge hole screw (3), and upper right side is provided with window annunciator (4).In methane warning instrument inside, battery (8) is installed in the below, and there is the set bolt (7) that connects instrument fore shell (9) and instrument back cover (6) at the middle part, by set bolt (7) the parallel installation electronic warning wiring board with housing (5) that makes progress.Electronic warning wiring board (5) comprises electronic warning circuit, digital indicator (1).Display (10) is installed in the position corresponding with display window, the middle and upper part of electronic warning wiring board (5), methane warning instrument internal upper part sensor installation (12) and hummer are installed O-ring seal (11) between sensor (12), alarm and the electronic warning wiring board (5).
In the accompanying drawing (3), reference voltage source IC 1Connecting line comprise: triode T 5Collector with power supply through diode D 1, D 2, resistance R 1Deliver to reference voltage source IC 11 end, reference voltage source IC 13 ends and amplifier F4 (IC 2) positive input terminal connect; Pass through resistance R 2With amplifier F1 (IC 2) negative input end connect; Pass through resistance R 13, potentiometer W 3Intermediate head and amplifier F3 (IC 2) positive input terminal connect; Pass through resistance R 01With A/D converter (IC 4) 12 pin connect.
Sensor (12) network comprises: resistance R 4With resistance R 5Series connection, resistance r 1With resistance r 2Series connection, resistance R 6With potentiometer W 1Sharp resistance R 7The series connection, after three series arm parallel connections with capacitor C 10Parallel connection, capacitor C 10Anodal while and resistance R 4, r 1, R 6An end and triode T 1Collector connects, capacitor C 10Negative pole and resistance R 5, r 2, R 7One end connects back ground connection.
Amplifier IC 2Connecting line comprise: amplifier IC 2The negative input end of F1 and resistance R 2, R 3Connect resistance R 2With resistance R 3The series connection back is by resistance R 3Ground connection; Positive input terminal and resistance R 4, R 5Connect; Output terminal and triode T 1Base stage connects.Amplifier IC 2The positive input of F2 is auspicious through resistance R 11Ground connection is simultaneously through resistance R 9With resistance r 1, r 2Connect; Negative input end is through resistance R 8With potentiometer W 1Central point connects, simultaneously through resistance R 10Output terminal connects, and output terminal is through potentiometer W ground connection.Amplifier IC 2The negative input end of F3 is through resistance R 12With electrical equipment W 2Central point connect the resistance R in addition that is connected with central point simultaneously 14Positive input terminal and potentiometer W 3Central point connect resistance R 3, potentiometer W 3The series connection back is by potentiometer W 1Ground connection; Output terminal is through resistance R 18, triode T 3Base connects.Amplifier IC 2The positive input terminal of F4 and resistance R 13And resistance R 01Connect; Negative input end and resistance R 16, R 15Resistance R 16With resistance R 15Series connection, resistance R 16Connect positive source, resistance R 15Ground connection; Output terminal is through resistance R 17With triode T 2Base stage connects.
Supply convertor IC 3Connecting line comprise: 1 pin is simultaneously and capacitor C 1Positive pole, capacitor C 2Negative pole connect 2 pin, 5 pin ground connection, 3 pin and capacitor C 1Negative pole connect 4 pin and capacitor C 4Positive pole and IC 42 pin connect, 6 pin are connected with positive source and diode D positive pole.
A/D converter IC 4Connecting line comprise: 1 pin, 6 pin, 8 pin, 11 pin ground connection, 3 pin and capacitor C 6An end connect; 4 pin and resistance R 20An end connect; 5 pin and capacitor C 7An end connect capacitor C 6, resistance R 20, capacitor C 7Three's the other end is connected, 7 pin and capacitor C 5An end, resistance R 14An end connect capacitor C 5Other end ground connection, resistance R 14The other end and potentiometer W 2Mid point, resistance R 12An end connect, be connected capacitor C between 9 pin and 10 pin 8, 12 pin and resistance R 01And resistance R 02An end connect; 13 pin and capacitor C 2An end connect 14 pin and resistance R 21An end connect; Capacitor C 9, resistance R 21The other end of the two is connected with 15 pin; 16 pin and capacitor C 3Anodal, resistance R 1An end, diode D 2Negative pole connects, diode D 2Positive pole and capacitor C 2Positive pole, diode D 1Negative pole connect A 0～A 23Pin and digital indicator LED (10) K 0～K 23Pin connects, 1 pin of digital indicator LED (10) and triode T 2Emitter connects; 2 pin and resistance R 19An end connect resistance R 19The other end be connected with positive source.
The power switch connecting line comprises: the end of thin film switch K and the resistance R that is connected in parallel 03, capacitor C 11And double D trigger IC 5CP end connect parallel resistor R 03, capacitor C 11The other end ground connection of the two, double D trigger IC 5D end hold with Q and be connected; Q end and triode T 4Base stage connects, triode T 4Grounded emitter; Collector and resistance R 04One end connects, resistance R 04The other end and triode T 5Base stage connects, triode T 5Current collection is the positive output utmost point very; The other end of emitter and thin film switch, dry cell positive pole, diode D 4Negative pole connects.
During use, Push switch K, double D trigger IC 5The output high level, triode T 4, T 5Conducting, with power connection, alarm is in duty, when the test environment methane concentration was above standard, sensor (12) output electric signal made sensor (12) network export a unbalance signal, amplifier amplifies this signal, and (HA) sounds by hummer; Convert numerical information to by A/D converter IC and on digital indicator, demonstrate its concentration.During shutdown, connect K switch again one time, double D trigger IC 5Output low level, triode T 4, T 5End, with power remove.
This methane warning instrument instrument movement (5) is two-sided copper clad plate, and single face is installed electronic devices and components, makes maintenance convenient.

Claims (2)

1, a kind of superminiature methane detection alarming instrument mainly comprises casing, electronic warning wiring board (5), digital indicator (10), battery (8) and power switch, the electric positive R of sensor (12) network 4With resistance R 5Series connection, resistance r 1With resistance r 2Series connection, resistance R 6With potentiometer W 1And resistance R 7The series connection, after three series arm parallel connections with capacitor C 10Parallel connection, capacitor C 10Anodal while and resistance R 4, r 1, R 6An end and triode T 1Collector connects, capacitor C 10Negative pole and resistance R 5, r 2, R 7One end connects back ground connection, resistance r 1, r 2Tie point pass through resistance R 9With amplifier F2 (IC 2) positive input terminal connect; Potentiometer W 1Intermediate head pass through resistance R 2With amplifier F2 (IC 2) negative input end connect; Amplifier F2 (IC 2) output terminal by potentiometer (W 2) intermediate head, resistance R 14With A/D converter (IC 4) 7 pin connect, it is held to levy and is: thin film switch one end is connected with anode, diode cathode, pliotron emitter; The other end is connected with a trigger end of a parallel resistor and electric capacity and double D trigger, the other end ground connection of parallel resistor and electric capacity, and another trigger end of double D trigger is connected with its negative output terminal; Positive output end is connected with preposition transistor base, preposition transistor emitter ground connection; Collector connects by the resistor power transistor base, the current collection of pliotron is the power supply positive output end very, nameplate is installed in the outer middle and lower part of casing, the middle and upper part is provided with display window, and left upper end is installed into gas gauge hole screw, and upper right side is provided with window annunciator, battery is installed in the bottom in the casing, the parallel installation electronic warning wiring board with casing in battery top cuts open sensor installation and hummer on the electronic warning wiring board, between sensor, hummer and the instrument movement O-ring seal is installed.
2, superminiature methane detection alarming instrument according to claim 1 is characterized in that: the reference voltage source IC in the alarm circuit 13 ends and amplifier F4 (IC 2) positive input terminal connect; Pass through resistance R 2With amplifier F1 (IC 2) negative input end connect: pass through resistance R 5, potentiometer W 3Intermediate head and amplifier F3 (IC 2) positive input terminal connect; Pass through resistance R 01With A/D converter IC 412 ends connect.
CN 95239894 1995-06-03 1995-06-03 Ultramicro methane detecting and warning instrument Expired - Fee Related CN2244193Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 95239894 CN2244193Y (en) 1995-06-03 1995-06-03 Ultramicro methane detecting and warning instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 95239894 CN2244193Y (en) 1995-06-03 1995-06-03 Ultramicro methane detecting and warning instrument

Publications (1)

Publication Number Publication Date
CN2244193Y true CN2244193Y (en) 1997-01-01

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Application Number Title Priority Date Filing Date
CN 95239894 Expired - Fee Related CN2244193Y (en) 1995-06-03 1995-06-03 Ultramicro methane detecting and warning instrument

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CN (1) CN2244193Y (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105738573A (en) * 2016-02-27 2016-07-06 乐清市启铭电气有限公司 Portable gas alarming device and debugging method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105738573A (en) * 2016-02-27 2016-07-06 乐清市启铭电气有限公司 Portable gas alarming device and debugging method
CN105738573B (en) * 2016-02-27 2017-11-28 乐清市启铭电气有限公司 A kind of portable gas alarm and adjusting process

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C19 Lapse of patent right due to non-payment of the annual fee
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