CN2308898Y

CN2308898Y - Intelligent methane detecting recorder

Info

Publication number: CN2308898Y
Application number: CN 97238773
Authority: CN
Inventors: 罗志明; 胡泳军
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-08-22
Filing date: 1997-08-22
Publication date: 1999-02-24
Anticipated expiration: 2007-08-22

Abstract

The utility model relates to an intelligent methane detecting recorder, which is composed of a methane sensor, a constant-voltage circuit, an amplifier, a power supply, a digital display, buttons, a data memory, an audible and visual alarm and a microprocessor which has the functions of procedure control, data processing, zero point tracking and output characteristics correction. The microprocessor, as a center of connection and control, is connected with a nixie display by a display driver. The methane sensor is connected with the constant-voltage circuit and the amplifier. A strong protective coat is arranged outside the data memory. The utility model has the advantages of reliability, high precision, small volume, convenient operation and complete functions such as reliable preservation of the tested data and extensible detection of carbon monoxide, oxygen, temperature, etc.

Description

Intelligence methane detection record instrument

The utility model relates to a kind of Based Intelligent Control pick-up unit of electronic technology field.

In mining and mine working operation, gas has great threat for safety work, in a single day gases such as methane wherein, carbon monoxide and oxygen reach finite concentration, to jeopardize the safety of personnel and mine, so relevant department's methane detection alarming instrument that has been the underground work staffing all generally.But present employed methane detection alarming instrument has the big and defectives such as inconvenience is carried, troublesome poeration, reliability and poor accuracy of volume, and function is comprehensive inadequately, and its circuit structure also is unfavorable for expanding new measuring ability; Also have a defective be exactly in case device because of collision, water logging or meet fiery impairedly, its inner data-carrier store is very easily read because of damage can't be restored wherein testing result data again, then can't analyze underground detection record.

The purpose of this utility model is to provide a kind of and has high reliability and high precision, volume is little, multiple functional and extendibility is good, easy and simple to handle, can reliably preserve the intelligent methane detection record instrument that detects data.

The technical solution of the utility model is as follows: it is by the methane transducer that is used to detect methane concentration, constant voltage circuit, be used for the amplifier that detection signal amplifies, the essential safety power supply of working power is provided, display characteristic parameter and testing result nixie display, the button that control function is selected and adjusted, be used to store the data-carrier store of testing result data, but audible-visual annunciator and implementation procedure control, data processing, the microprocessor that follow the tracks of of zero point and output characteristics is calibrated is formed, wherein microprocessor connects methane transducer respectively, amplifier, button, data-carrier store and essential safety power supply, microprocessor links to each other with nixie display by display driver again, the essential safety power supply again with constant voltage circuit, amplifier links to each other, methane transducer again with constant voltage circuit, amplifier links to each other.The operating voltage of methane transducer is provided by constant voltage circuit by the essential safety power supply, methane transducer collects extraneous concentration of methane gas signal, do to send into microprocessor after signal amplifies through amplifier, by depositing other data such as methane concentration value and time, temperature in data-carrier store after the microprocessor processes, on nixie display, show the methane concentration value simultaneously, in case this methane concentration value surpasses the concentration warning value that presets, then immediately by the acoustic luminous warning of audible-visual annunciator.

The utility model adopts advanced superminiature microprocessor can realize that follow the tracks of of zero point and the output characteristics calibration, be about to sensor characteristic variation (comprising that zero point drift and gain reduction change) and all write down and preserve, eliminate the error that influence caused of these changed factors by calculating during detection testing result.But the software of microprocessor is the non-linear influence that causes accuracy of detection of modifying factor sensor also.The sampled signal input microprocessor of the cell voltage that the utility model also can provide the essential safety power supply is to monitor this cell voltage and the detection error that therefore causes by the software correction.The utility model also can be provided with the operate as normal value of sensor in microprocessor, by to the working sensor status detection, can judge that whether its working condition is normal, sends cue when sensor breaks down.

The utility model also can connect other sensors such as carbon monoxide transducer, oxygen sensor or temperature sensor by constant voltage circuit, make the utility model simultaneously parameters such as airborne to external world carbon monoxide, concentration of oxygen and temperature value detect.Data-carrier store described in the utility model adopts nonvolatile memory, even outage also still can be preserved every detection data of being stored like this.The communication interface that the utility model can utilize microprocessor to provide inputs to computing machine with data and preserves or handle.

Layer adopts metallic steel body shell, partiting thermal insulation material and the exotic material of sealing to constitute protective seam outside the data-carrier store described in the utility model; this firm protective seam can the anti-collision shatter-resistant, waterproof, fire prevention; even take place under the fried cruelly superhigh temperature of gas still can the protected data storer safe and sound; can in ruined casing, take out data-carrier store after the accident; data in the data-carrier store can be read and printed by special purpose interface; by the raw data of detection record before the accident is analyzed, help to understand culprit and process like this.

The utlity model has high reliability and high precision, follow the tracks of of its zero point and the output characteristics calibration function can be revised the relevant detection resultant error automatically and effectively, improves data precision; Volume is little, carries easily, and its physical dimension can be designed to: 116 * 62 * 28mm weighs 250 grams; It is multiple functional, and extendibility is good, can detect a plurality of parameters such as gas concentrations such as methane, carbon monoxide, oxygen and temperature, time simultaneously; Intelligent degree height, easy and simple to handle, only need four buttons of design can finish all functions and select and realize parameter adjustment; The utility model can also reliably be preserved the detection data, makes it when whole device is impaired to the set protective seam of data-carrier store wherein, can guarantee that still data are perfectly safe.The utility model is applicable under the coal mine or the getting working face in tunnel, can be used as the high-tech product that coal mine safety apparatus updates.

Further specify the utility model below in conjunction with accompanying drawing.

Fig. 1 is a theory structure block diagram of the present utility model;

Fig. 2 is circuit theory diagrams of the present utility model.

Fig. 1 and Fig. 2 have reflected basic structure of the present utility model.When detecting, but both continuous automatic inspection, also manually the reference mark is surveyed, and the testing result data are stored in the special-purpose non-volatile data memory after microprocessor processes.The data of detection record can select data are shown on nixie display by keypress function, also can connect printer and with the data printout by special-purpose communication interface, and can with carry out Computer Data Communication, deposit recorded data in disk.

The utility model adopts 4 buttons among Fig. 2, i.e. on ﹠ off switch SR, zeroing/add 1 key S1, calibration/subtract 1 key S2, function shift key S3, and the user can finish whole functions by the operation of these 4 keys.Be divided into during the utility model work and be following four big functional modes:

1, basic model: measure and logging mode, in this pattern, finish the detection and the functions such as warning, data recording, battery voltage measurement and demonstration, zeroing and calibration and manual record of methane content.

2, pattern 0: time, date and instrument numbering are provided with and display mode.In this pattern, can realize the demonstration of date and time and modification, instrument numbering setting, time recording, the setting of sense cycle, instrument zero is followed the tracks of and the observation of calibration value.

3, pattern 1: the record data readout mode in this pattern, accesses the information in the data-carrier store in the nixie display cocycle by keyboard operation and to show.

4, pattern 2: printing reaches and the computing machine communication mode, in this pattern, finishes the printout on dedicated printer of the data in the data storer, carries out data communication with computing machine.

Nixie display of the present utility model can adopt 5 the LED charactrons and the triode Q1～Q5 in Fig. 2 upper right corner, and the methane concentration value shows that with 3 charactrons time showing needs 5 charactrons.Methane transducer adopts carrier catalyst element (claiming black-and-white component again) sensor RH and RB, and carbon monoxide transducer and oxygen sensor all adopt galvanochemistry to decide potentiometric sensor.The power supply of methane transducer is provided by the constant voltage circuit that comparer U1:B and triode T2 form, black-and-white component RH and RB and resistance R 23, R24 and potentiometer P1 constitute resistance bridge, and the output of this bridge circuit is sent into amplifier and amplified back formation methane concentration signal and send into microprocessor.The bleeder circuit that is made of resistance R 11 and R12 is sampled the magnitude of voltage input microprocessor U0 of battery E in addition, by microprocessor U0 monitoring battery voltage, can revise accordingly testing result of the present utility model when cell voltage is low.During working sensor of the present utility model, its duty is judged its working condition and fault state by the R25 input microprocessor according to the operate as normal value that presets, and then sends cue by microprocessor when working sensor is undesired.In Fig. 2, the protected layer protection of data-carrier store U4, even have an accident, the utility model is buried, its casing and circuit board is smashed or by water logging or under the moment of gas explosion high temperature or the like rugged surroundings, but still protected data storer U4 is not impaired; The essential safety power supply E of encapsulation can charge, and it links to each other with microprocessor U0 by electronic switch T1; Audible-visual annunciator comprises resistance R 13, luminotron LED, loudspeaker SP; U2 is a clock chip, and U3 is a display driver, and INT SCLT, the SDAT that provides on the microprocessor U0, SCLE, SDAE pin constitute communication interface.

Claims

1, a kind of intelligent methane detection record instrument, it is characterized in that it being methane transducer by being used to detect methane concentration, constant voltage circuit, be used for the amplifier that detection signal amplifies, the essential safety power supply of working power is provided, display characteristic parameter and testing result nixie display, the button that control function is selected and adjusted, be used to store the data-carrier store of testing result data, but audible-visual annunciator and implementation procedure control, data processing, the microprocessor that follow the tracks of of zero point and output characteristics is calibrated is formed, wherein microprocessor connects methane transducer respectively, amplifier, button, data-carrier store and essential safety power supply, microprocessor links to each other with nixie display by display driver again, the essential safety power supply again with constant voltage circuit, amplifier links to each other, methane transducer again with constant voltage circuit, amplifier links to each other.

2, intelligent methane detection record instrument according to claim 1 is characterized in that connecting carbon monoxide transducer, oxygen sensor or temperature sensor by described constant voltage circuit.

3, intelligent methane detection record instrument according to claim 1 is characterized in that described data-carrier store adopts nonvolatile memory.

4,, it is characterized in that layer adopts metallic steel body shell, partiting thermal insulation material and the exotic material of sealing to constitute protective seam outside the described data-carrier store according to claim 1 or 3 described intelligent methane detection record instrument.