CN202661428U - Alcohol detection access control system for mine - Google Patents
Alcohol detection access control system for mine Download PDFInfo
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- CN202661428U CN202661428U CN 201120466113 CN201120466113U CN202661428U CN 202661428 U CN202661428 U CN 202661428U CN 201120466113 CN201120466113 CN 201120466113 CN 201120466113 U CN201120466113 U CN 201120466113U CN 202661428 U CN202661428 U CN 202661428U
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- alcohol
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Abstract
The utility model discloses an alcohol detection access control system for a mine in mine safety production, belonging to a gas tester. The system comprises an alcohol concentration detection part (consisting of an alcohol detection circuit and a processor system), a detection voice alarm part and a three-roller gate channel control part, wherein the alcohol concentration detection part (consisting of an alcohol detection circuit and a processor system), the voice alarm part and the three-roller gate channel control part are sequentially connected. The system disclosed by the utility model has the advantages that the test interval is shortened that the next test starts after the test lasts for 3 seconds; the sensitivity is high, the zero drift is little, and the measurement error is low, thus the measurement is more accurate; and the system provides guarantee to the mine safety production.
Description
Technical field
The utility model relates to a kind of gas determinator, relates in particular to the mining measuring wine access control system that a kind of mine safety production is used.
Background technology
The existing wine system that surveys all is to adopt pick-up transducers voltage to judge alcohol concentration in the gas.Because in a single day alcohol sensor run into alcohol, voltage is about to raise, but after alcohol gas was withdrawn, voltage recovers original level needed the time longer, thereby causes the alcohol user to test rear warning, wait for that sensor recovers, and waits for like this that next time the test duration is oversize.
The utility model content
The utility model provides a kind of mine to survey the wine gate inhibition.When entering the well personnel through this instrument, can measure in real time, alcohol sensor namely can start alerting signal after running into alcohol.
The composition of system substantially is divided into alcohol concentration test section (alcohol detection circuit and processor system form), detects audio alert part and three rod lock passage control sections, and this cover system has been finished in these three part collaborative works.Wherein the alcohol concentration test section is connected with detection audio alert part and three rod lock passage control sections by processor system, and audio alert part and three rod lock passage control sections are detected by processor system control in the alcohol concentration test section.
The beneficial effects of the utility model are:
1. the test interval is short.
2, highly sensitive, high performance sensor adds the setting of instrument internal software, so that instrument has higher sensitivity to the detection of alcohol.
3, stable performance, the sensing element of employing long-life, high stable and rational line design make the instrument serviceability very stable, and adjustment is simple and easy.
Description of drawings
Fig. 1 is this use novel system pie graph
Fig. 2 is the sensory characteristic figure that standard test conditions obtains;
Fig. 3 is the utility model basic test loop;
Fig. 4 is that the utility model system consists of block diagram representation;
Fig. 5 is the utility model AD interrupt routine process flow diagram;
Embodiment
Below in conjunction with accompanying drawing the utility model is described in detail.
A kind of mining measuring wine access control system, comprise alcohol concentration test section (alcohol detection circuit and processor system form), detect audio alert part and three rod lock passage control sections, three parts composition, alcohol concentration test section (the alcohol detection circuit is connected with processor system), detection audio alert part and the rod lock passage of being connected connect successively.。
Visible Fig. 1 of composition of concrete system.
In order to solve existing alcohol sensor long problem release time, native system has proposed the method that adopts slope to calculate.
(1) alcohol sensor selects
Alcohol sensor is as most important sensing element in the native system, and the height of its sensitivity has directly determined the sensitivity of whole system.Process is to the contrast experiment of the alcohol sensor of a plurality of manufacturer production, and the TGS822 alcohol sensor of Figaro production has higher sensitivity.
The air-sensitive sub-prime of Figaro gas sensor uses the tin ash (SnO2) that conductivity is low in clean air.When existence detected object gas, the conductivity of sensor increased with gas concentration in the air.Use in the simple shop and the variation of conductivity can be converted to the output signal corresponding with this gas concentration.
The TGS822 sensor is higher to the sensitivity of alcohol, organic solvent, is used widely at aspects such as alcohol detectors.Fig. 2 is typical sensory characteristic, all is the result who draws under standard test conditions.
Ordinate represents than (Rs/Ro) with sensor resistance, Rs, and Ro is defined as follows:
Rs=is with the resistance value in the concentration gases
Resistance value in the Ro=300ppm ethanol
(2) the basic test loop as shown in Figure 3.
The test loop of this sensor as shown in Figure 3, sensor need to apply 2 voltages as seen from the figure; Heater voltage (Vh) and loop voltage (Vc).This Vh is used for keeping responsive sub-prime and is in the specified temp that adapts with object gas and is applied to integrated well heater.Vc then is for the both end voltage (Vrl) of measuring on the pull-up resistor (Rl) of connecting with sensor.This sensor has polarity, so Vc need use direct supply.As long as can satisfy the electrical requirement of sensor, Vc and Vh can share same power circuit.For with the horizontal optimization of decision content, and make the power consumption (Ps) of responsive sub-prime be lower than the limit value of 15mW, need to select the value of RL.
(3) theoretical foundation
Substantially more linear than the resistance of the concentration of scheming gas as can be known and sensor by gas concentration-sensor resistance.Output voltage and the gas concentration that can draw test circuit from the computing formula of basic test loop figure and sensor resistance present proportional relationship substantially.The response time of supposing sensor is a definite value.The slope of the higher then output voltage of the concentration of gas is higher so, then can extrapolate the concentration of gas according to slope.
The concentration of gas belongs to the relation of stack, when continuous two people that drink test, in first man when test, be more residual alcohol steams around sensor, the alcohol concentration of first man is calculated by system according to its slope meter, when second people tests, owing to there has been alcohol steam, so concentration should superpose, but gathering way of concentration is the impact that the slope of output voltage is not subjected to original alcohol steam, so when second people tests, still can calculate according to the slope of output voltage, so just needn't wait for that sensor recovers, save the stand-by period, this also is the design's theoretical foundation.
The composition structure of practical application
(1) block diagram of system: Fig. 4 is the design's actual composition diagram, sensor is converted to corresponding electric signal to the value of alcohol concentration in the air, carry out the digitizing of electric signal through the AD sampling end of delivering to microprocessor behind the plastic filter circuit, the result of microprocessor after according to digitizing carries out the analytic method of slope and processes, then according to the switch of result control audio alert and passage.
(2) test loop adopts the basic test loop to get final product.
(3) processor adopts the mega family chip mega16 of Atmel as requested.
Mega16 is the avr processor of the high-performance low-power-consumption of U.S. Atmel company release, its inner integrated FLASH of 16kB, 8 tunnel 10 ADC, sampling rate is up to 15kSPS during highest resolution, performance can be fit to the demand that sensors A D sampling is calculated fully up to 16MIPS when working in 16MHz.Mega16 has multiple interfaces circuit: IIC, SPI, and UART, and maximum 32 programmable I/O mouths can realize the various communication interfaces with external circuit.Mega16 supports the ISP function, can carry out online programming, modification to device very easily when program design, debugging.Selecting Mega16 based on above characteristics the design is main control chip.
(4) to adopt the fly out high-end chipspeech XF-S4040.XF-S4040 of product of University of Science and Technology news are chipspeechs that the University of Science and Technology news fly a middle and high end of company's release to phonetic warning system.Can pass through asynchronous serial port, IIC interface reception arbitrary text, and text is converted into voice output, support six kinds of pronunciation styles, software can be regulated word speed, intonation, support the text control mark, promote the accuracy of text-processing, the minimum size of this chip can be integrated in the embedded device that needs speech-sound synthesizing function easily, for it adds the phonetic function of hommization, provide the voice solution of a cover high performance-price ratio for the user.
(5) three rod lock control system adopt the full-automatic three rod brake systems of selling on the market to get final product.
(6) in the design of software, mainly used the timing AD tts resource (seeing Fig. 5) of single-chip microcomputer, slope according to described our the needs calculating voltage conversion of preamble is voltage variation range within a certain period of time, and using regularly, the AD translation function can realize this demand easily.
Single-chip microcomputer ceaselessly in the AD conversion of doing regularly, carries out filtering, comparison in the Software for Design in EOC interrupts, and the difference of twice AD measured value is the rate of change of voltage, namely our needed slope value.Can calculate the concentration of alcohol according to slope, control just according to concentration that voice system is reported to the police and the rotation of three rod brake systems, realization is to alcohol user's access control.Fig. 5 is the software flow pattern that the AD conversion is interrupted, in master routine, needs only according to the zone bit that arranges in this interruption and can make corresponding operation, and such as the control of speech play, the switch of three rod locks etc.
Claims (1)
1. mining measuring wine access control system, it is characterized in that, alcohol concentration test section, detection audio alert part and three rod lock passage control sections, wherein the alcohol concentration test section is connected with detection audio alert part and three rod lock passage control sections by processor system, and audio alert part and three rod lock passage control sections are detected by processor system control in the alcohol concentration test section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120466113 CN202661428U (en) | 2011-11-22 | 2011-11-22 | Alcohol detection access control system for mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120466113 CN202661428U (en) | 2011-11-22 | 2011-11-22 | Alcohol detection access control system for mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202661428U true CN202661428U (en) | 2013-01-09 |
Family
ID=47456326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120466113 Expired - Fee Related CN202661428U (en) | 2011-11-22 | 2011-11-22 | Alcohol detection access control system for mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202661428U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707841A (en) * | 2016-10-14 | 2017-05-24 | 广东技术师范学院 | Automatic door security protection intelligent monitoring system |
-
2011
- 2011-11-22 CN CN 201120466113 patent/CN202661428U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707841A (en) * | 2016-10-14 | 2017-05-24 | 广东技术师范学院 | Automatic door security protection intelligent monitoring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20131122 |