Background technology: now the nearly all mine of China also uses traditional dimeric split type down-hole mine lamp, the battery of a store electrical energy of bearing for waist, and one is the white duty lamp of illumination on the helmet, patches continuous through rubber cable.Miners are when the work of down-hole, always feel that cable is scraped and pull constraint, loaded down with trivial details awkward, particularly China's manpower is transported the small coal mine of coal, sometimes balk will be bent over even creeped and drag coal, and the gravity of lead-acid accumulator makes waist that the side direction sense of bearing a heavy burden be arranged, the long chronic lumbar strain occupational disease that forms easily of time, this be one form for a long time, be accustomed to, turn a blind eye to, unavoidable way.After external semiconductor lighting begins to be applied to normal lighting, China Department of Science and Technology, " national semiconductor lighting engineering " emergency start of six ministries and commissions such as the Ministry of Information Industry and 14 local government's common implementings large quantities of " exploitation of semiconductor lighting industrialization technology " major project, this is because white high brightness light emitting diode LED is a cold light source, with traditional incandescent lamp, fluorescent lamp is compared, electric energy can reach 80%, life-span can reach more than 20000 hours, when being used for mine lamp, then corresponding energy storage battery capacity, volume and weight can dwindle greatly, and the progress of battery technology in recent years, Ni-MH battery, lithium ion batteries etc. can accomplish that volume is little, capacity is big, there is not corrosion, easy to carry, this just impels the inventor to expect the small size battery is placed on inner helmet, and mine lamp is become one, and the miner goes into the well and just need only wear a helmet like this, the free balance of figure. and light and handy convenient. waist no longer includes lateral force and the cable extension pulls sense.Working condition is improved to the underground labour and has been brought Gospel, be developed as request for product in this way patent, number of patent application: 200520088220.0 helmet cell integral mine lamps.But the workman is in the down-hole, the still gas explosion of worrying most, and gas (CH4 methane) is inseparable with the colliery, have only many and few problem, where the where is it colliery just has gas, but have only gas overpressure to cross finite concentration, just might ignite by spark, in order thoroughly to solve workman's trouble and worry of going into the well, promote down-hole well-ventilated everywhere, guarantee safety in production, after the gas detection and the warning circuit miniaturization that exceeds standard, be placed on CB common battery in the helmet, if exceed standard (for example 1% (volume ratio)) then prompting sound is arranged, arouse attention, the down-hole ventilating management personnel of announcement note in advance, as reach 2% sound and light alarm immediately, as not improving as early as possible, district then out of danger, because the detection alarm circuit is on own head, the reaction time was less than 20 seconds, at any time where can learn safety, certainly do not need each workman all to be with, owing to the cost reason, having only on the gaffer of face or group leader one or two people's the helmet has just.
Summary of the invention: the utility model aims at down-hole miner and wears illumination and give alert design, simplify circuit, weight reduction, reduced volume, all be loaded on inner helmet, easy to use, each component weight equiblibrium mass distribution, gas only detect regularly sampling observation and do not produce spark to save the energy, after the workman wears, figure's freedom, it is reliable to report to the police, and just can be subjected to miners' welcome, from this requirement, important change of the present utility model: first is exactly the incandescent lamp of original illumination light-emitting is changed into the semiconductor white light-emitting diode LED of high brightness high efficiency band optically focused itself, and general LED is luminous to be the scattering of fan type, and photograph is not far, so needing by parabolic reflector optically focused is directional light, second battery that waist is born changes small size into. high-capacity lithium ion cell, and be arranged at inner helmet, as the right and left top or rear portion, can certainly use other compact batteries, as Ni-MH battery.Firedamp sensor and warning circuit are placed helmet front portion or rear portion, helmet front portion then is an illuminating lamp, distribution all around, the structural design that as far as possible meets ergonomics, head stress equalization decentralization principle, take into account and improve the anti-drop mechanical strength of helmet shock resistance, reflect according to the downhole coal mine workman, illuminating lamp is fixed on the helmet towards the dead ahead, convenient during work, but it is rugged when walking owing to the down-hole, the road of turnover getting working face is very long, to bow always and see the road, helmet long-time continuous is just inconvenient down, head is stressed forward, so miners often take lamp according to the road, this is a difficult problem that never has fine solution, again according to up-to-date mine lamp national standard: " the general requirement of mine lamp security performance " (GB7957-2003), the mine lamp of looking for novelty has two light sources at least, so increase a secondary light source, be downwards about 60 degree with main light source towards the dead ahead, illuminate for about one meter to pin the place ahead, then above-mentioned road problem and the two light source requirements seen are readily solved simultaneously, each get that it is suitable.It is convenient to facts have proved that at this moment the workman walks, and takes than lamp and has easy and conveniently howed.The 3rd is exactly the gas-warning system, sensor can not adopt directly-heated type commonly used, heater-type and catalytic combustion type, because power consumption is big, reaction is slow, can only adopt with tin ash is the semi-conductor type gas sensor of basic sensitive material, it is characterized by high sensitivity and the response speed that is exceedingly fast, and low in energy consumption.The intermittent controlled circuit is adopted in power supply.Follow procedure is arranged, semi-automatic zeroing. transfer multiplication factor and non-linear compensation.For weight reduction as far as possible, simplify circuit, also can not use single-chip microcomputer easily, after the dc amplifier amplification, Schmidt circuit is screened and is reported to the police, but voltage is up to 4.2 volts after adapting to lithium ion cell charging, the work that goes down into a mine is after several hours, cell voltage has only 3.6～3.7 volts, this variable effect to illuminating lamp illumination is little, because for a long time under dark surrounds, pupil can enlarge automatically, lighting quantity increases, visibility is adjusted automatically, and is insensitive to illumination, working properly, certainly want the constant current constant voltage power supply, it is best to increase the constant current link, to the detection of CH4, and supply voltage and A/D conversion reference voltage, necessary strict constant voltage stabilizing, isolate voltage stabilizing again by lithium battery voltage after inversion like this, become two groups of power supplys, one is heating voltage, for example 1.8 volts, one is dc amplifier, single-chip microcomputer and all the other power electronics, positive 5 volts, dc amplifier is that high-gain is from steady zero circuit, use micropower integrated circuit, the A/D conversion is finished the chip as PIC16C71 and so on by single-chip microcomputer, has the A/D translation function, the sound equipment flash alarm circuit, being routine techniques, is a process slowly according to the accumulation of fire damp, and detection time, general 10-15 was promptly stable second, the consuming electric power in order to reduce, continuous detecting for a long time, testing circuit will be switched on and be detected 20 seconds, stopped 60 seconds or more than, testing circuit does not have electricity when stopping, and so just can save gas alarm circuit work electricity consumption.Also charger should be arranged in addition, but not on the helmet.So the novel structure of this use is the mining helmet, lithium ion battery is put at inner the right and left or top, rear portion, helmet front portion is an illuminating lamp, lamp has main light source, by Sparkless switch control, towards the dead ahead, by the strong white light-emitting diode illumination that light gathering is arranged itself, periphery is the reflecting condensation cover, and other has secondary light source, shines the road towards the front lower place by another switch control, the double as standby power source, inner helmet also has the gas detection head to reach warning circuit down, and it is output as sound and light alarm, when in the air during methane content 1%, alerting sound is arranged, when reaching 2%, flash of light is arranged, double warning.
The utility model market-head helmet. battery. lamp. gas detects. and warning circuit is in one, the workman goes down into a mine and need only wear a helmet, lightly freely, primary light source sources light dead ahead during work, during the walking of down-hole, major-minor light source is simultaneously bright, conveniently see the road, gas exceeds standard and reports to the police automatically, and is convenient and safe, is the major reform and the progress of old-fashioned traditional mine lamp; Working condition and safety in production have been improved greatly.
