CN209182230U - A kind of coal mine portable mobile wireless laser methane detection alarm - Google Patents
A kind of coal mine portable mobile wireless laser methane detection alarm Download PDFInfo
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- CN209182230U CN209182230U CN201821750473.3U CN201821750473U CN209182230U CN 209182230 U CN209182230 U CN 209182230U CN 201821750473 U CN201821750473 U CN 201821750473U CN 209182230 U CN209182230 U CN 209182230U
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Abstract
A kind of coal mine of the utility model detects alarm with portable mobile wireless laser methane, belongs to methane concentration detection technique field；The technical problem to be solved is that providing, detection accuracy is high, the response time is fast, easy to operate portable mobile wireless laser methane detects alarm；Solve the technical solution of technical problem use are as follows: including shell, circuit board, laser probe and OLED display module on the shell and film key are set, STM32 microprocessor and the crystal oscillating circuit being connected with STM32 microprocessor, power circuit, key circuit, wireless module, OLED display module, data storage circuitry, sound light alarming circuit and voltage detecting circuit are provided on circuit board, laser probe is connected with the input terminal of STM32 microprocessor, and film key is connected with key circuit；The utility model can be widely applied to coal production.
Description
Technical field
A kind of coal mine of the utility model detects alarm with portable mobile wireless laser methane, belongs to methane concentration detection technique
Field.
Background technique
Gas is one of five the Nature disaster of coal mine, and gas accident is the main security accident of coal mine.CH_4 detection alarm
Instrument is the important instrument that gas data are monitored in coal mine gas monitoring and controlling system.What underground coal mine used at present is that conventional carriers are urged
Change the methane detection alarming instrument of principle, principle is methane gas in the progress flameless combustion of carrier catalyst element surface, to change
The resistance value of catalysis element is shown after being transformed into electric signal with numerical value.In the detection process, it is existing to there is burning in sensing head
As not having intrinsic safety, being influenced vulnerable to other gases (such as hydrogen sulfide, sulfur dioxide), while every 15 days need to instrument
Device carries out an adjustment, and the adjustment period is short, and maintenance workload is big.
Utility model content
A kind of coal mine of the utility model detects alarm with portable mobile wireless laser methane, overcomes of the existing technology
Deficiency provides the portable mobile wireless laser methane detection alarm that detection accuracy is high, the response time is fast, easy to operate.
In order to solve the above-mentioned technical problem, a kind of the technical solution adopted in the utility model are as follows: coal mine portable mobile wireless
Laser methane detects alarm, and including shell, circuit board, laser probe and OLED display module on the shell and film is arranged
Key, be provided on circuit board STM32 microprocessor and the crystal oscillating circuit being connected with STM32 microprocessor, power circuit, by
Key circuit, wireless module, OLED display module, data storage circuitry, sound light alarming circuit and voltage detecting circuit, laser probe
It is connected with the input terminal of STM32 microprocessor, film key is connected with key circuit.
Further, air inlet window is provided on the shell, the nanometer material of one layer of water proof and dust proof is inlayed in the inside of air inlet window
Material.
Further, the side of the shell is provided with rear cover, and the joint design one of the shell and the rear cover is enclosed recessed
Slot, groove embed sealing strip.
Further, the shell is integrated injection molding, and material therefor is PC plastic and ABS plastic mixture.
Further, the laser probe and the wireless module are connected using UART interface with the STM32 microprocessor,
The OLED display module and the data storage circuitry are connected using SPI interface with the STM32 microprocessor.
The utility model has the advantages that compared with prior art.
1, laser-sensitive element is replaced carrier catalyst element by the utility model, using methane gas to specific wavelength laser
Principle of absorption measure methane concentration, the combustion phenomena of sensing head is avoided, not by ambient temperature, dust and other gas shadows
It rings, detection is accurate, and the corresponding time is fast, high reliablity, while annual need to carry out 1 to 2 calibration to instrument, and laser diode makes
It is about 5 years with the service life, whole maintenance workload is small.
2, the utility model has been embedded in wireless module, realizes the wireless upload of data, can in safety monitoring system
Radio network gateway matches, and uploads data to ground host computer.
3, the utility model is designed low using STM32 low-power chip and research low-power consumption algorithm by switching component
Power digital circuit reduces complete machine power, to extend the complete machine working time, after tested, complete machine continuous work was up to 17 hours, than row
It extends the time by about one time within 10 hours specified in industry standard AQ6207-2007.
4, the utility model shell is formed using integrated injection moulding mode, and drop resistant is beaten, rub resistance, and air inlet window uses blinds
The design method of window inlays the nano material of one layer of water proof and dust proof good permeability in the inside of air inlet window, at the same in shell and
The one circle groove of joint design of rear cover, groove embed sealing strip, combine closely with rear cover convex portion, further increase waterproof
Dust-proof effect, complete machine degree of protection is up to IP65.
5, the utility model uses OLED display technology, and self-luminous does not need backlight, and contrast is high, and thickness is thin, visual angle
Extensively, driving voltage is low.Since OLED is self-luminous, screen display area is directly proportional to power consumption, therefore according to system function design
Optimal display interface, further decreases system power dissipation.
6, the utility model circuit board uses modularized design, facilitates system function upgrading and secondary development；Function is integrated
Du Genggao, the size of core circuit plate only have 64.7*50.9mm, package size 115*56mm, have identity function than similar
Small product size it is smaller, it is lighter.
Detailed description of the invention
Fig. 1 is the electrical block diagram of the utility model.
Fig. 2 is the Shell structure figure of the utility model.
Fig. 3 is STM32 microprocessor portion circuit provided by the utility model and crystal oscillating circuit figure.
Fig. 4 is voltage conversion circuit schematic diagram provided by the utility model.
Fig. 5 is voltage control circuit schematic diagram provided by the utility model.
Fig. 6 is keystroke interface circuit diagram provided by the utility model.
Fig. 7 is film key trace-diagram provided by the utility model.
Fig. 8 is data storage circuitry schematic diagram provided by the utility model.
Fig. 9 is OLED display module interface circuit schematic diagram provided by the utility model.
Figure 10 is laser module interface circuit schematic diagram provided by the utility model.
Figure 11 is sound light alarming circuit schematic diagram provided by the utility model.
Figure 12 is voltage detecting circuit schematic diagram provided by the utility model.
Figure 13 is wireless module interface circuit schematic diagram provided by the utility model.
Figure 14 is software overall framework figure provided by the utility model.
Figure 15 is software workflow figure provided by the utility model.
In figure, 1- shell, 2- film key, 3- display screen, 4- air inlet window, 100-STM32 microprocessor, 200- crystal oscillator
Circuit, 300- power circuit, 400- key circuit, 500- laser probe, 600- wireless module, 700-OLED display module,
800- data storage circuitry, 801- sound light alarming circuit, 802- voltage detecting circuit.
Specific embodiment
The utility model is described further with reference to the accompanying drawing.
As shown in Figure 1, a kind of coal mine of the utility model portable mobile wireless laser methane detection alarm, including shell 1,
Circuit board, laser probe 500 and the OLED display module 700 being arranged on shell 1 and film key 2 are provided on circuit board
STM32 microprocessor 100 and the crystal oscillating circuit 200 being connected with STM32 microprocessor 100, power circuit 300, key circuit
400, wireless module 600, OLED display module 700, data storage circuitry 800, sound light alarming circuit 801 and voltage detecting circuit
802, laser probe 500 is connected with the input terminal of STM32 microprocessor 100, and film key 2 is connected with key circuit 400.
Wherein, laser probe 500 and wireless module 600 are connected using UART interface with STM32 microprocessor 100, OLED
Display module 700 and data storage circuitry 800 are connected using SPI interface with STM32 microprocessor 100.
As shown in Fig. 2, the utility model is provided with air inlet window 4 on shell 1, the inside of air inlet window 4 is inlayed one layer and is prevented
The dust-proof nano material of water.The side of shell 1 is provided with rear cover, the one circle groove of joint design of shell 1 and rear cover, in groove
Embedding sealing strip, then combined closely by the convex portion of rear cover, whole design promotes water proof and dust proof effect further, and complete machine is anti-
Shield grade can reach IP65.Shell 1 is integrated injection molding, and material therefor is PC plastic and ABS plastic mixture.
The model STM32F103ZET6 of STM32 microprocessor 100 in the utility model, it is as core controller
Part, it is former using absorption of the methane gas to specific wavelength laser applied to the concentration of methane gas in underground coal mine detection environment
Reason measurement methane concentration, real-time display are detected the concentration of methane gas value in environment, and when methane concentration is more than alarming value
Sound-light alarm prompt is carried out, also there is time clock feature, can display real-time current time, there is history data store and inquiry function
Can, while it being embedded in wireless module in alarm, and realize the wireless upload of alarm data, it can be with the nothing in safety monitoring system
Gauze pass matches, and uploads data to ground host computer.
Crystal oscillating circuit 200 passes through a high speed crystal oscillator (8MHz) and a low speed crystal oscillator (32.768kHZ) and the micro- place STM32
It manages device 100 to connect, power circuit controls chip by voltage conversion chip and voltage and connect with STM32 microprocessor 100, key
Circuit 400 is connect using pad pasting key with STM32 microprocessor 100, and laser probe 500 and wireless module 600 pass through serial data
Mouth interface (UART1 and UART2) is connect with STM32 microprocessor 100, and OLED display module 700 and data storage circuitry 800 are logical
It crosses SPI mode (SPI1 and SPI2) to connect with STM32 microprocessor 100, sound light alarming circuit 801 passes through triode and STM32
The I/O port of microprocessor 100 connects, and voltage detecting circuit 802 is connect with the inside A/D pin of STM32 microprocessor 100.
Algorithm in STM32 microprocessor 100 mainly includes data acquisition, school zero, calibration algorithm.Data gathering algorithm master
Wanting function is to acquire the analog signal and digital signal of the output of laser methane sensing module；School zero, calibration algorithm major function are
Eliminate the slowly varying complete machine to alarm host in laser methane sensing module, circuit and other long term device use processes
The influence of precision property.Data gathering algorithm utilizes data collecting module collected analog signal, after data acquisition module is handled,
Output digit signals, then give CPU and carry out data acquisition, collected data denoise it using digital filter, are filtered
Wave；School zero, calibration algorithm are using an air gas and a pre-set criteria methane concentration gas to laser methane sensing module
School zero, calibration are carried out, makes laser methane sensing module after prolonged use, the laser first as caused by the decline of hardware itself
Alkane sensing module accuracy is deteriorated, and is influenced with the maskable thus bring in school zero and calibration algorithm.
Communication protocol according to initial data, school zero, calibration function and voluntarily work out.Agreement in laser methane sensing module and
Established between terminal using UART mode, it is that a kind of P2P(is point-to-point) communication mode, agreement led to as unit of frame
Believe, except (Hamming distance, also referred to as believes the Hamming distance of other external data of data in the communication protocol frame structure of design
Number distance, is a kind of method of constant error-detecting) it is at least 2, communication error rate can be effectively reduced.
If you need to school zero or calibration, host needs actively to send data to module:
(a) host sends frame:
Every 7 byte of frame fixed length.
The starting of Start(frame): hexadecimal is fixed as 0x3A.
Command(command character): character ' 1 ' is that host sends the order of school zero, and character ' 3 ' is that host sends calibration life
It enables, character ' 5 ' is that host sends reset zero calibration parameter order of school (restoring factory-said value).
Data1, Data2(data): it is 100 times of real data to there is 16 integers of symbol, Data1 is most-significant byte,
Data2 is low eight.
Check(8 bit check byte): 16 hex values of order and data add up and ' Check=Command+Data1+
Data2’。
End frame: 0x0D 0x0A.
(b) module response frame:
Every 6 byte of frame fixed length.
The starting of Start(frame): hexadecimal is fixed as 0x3A.
Command(command character): character ' 2 ' is that module returns to the response ordered school zero, and character ' 4 ' is module return
Response to calibration command, character ' 6 ' are response of the module return to reset command.
Flag(implementing result): character ' 1 ' is that successfully, character ' 0 ' is failure.
Check(8 bit check byte): 16 hex values of order and result add up and ' Check=Command+Flag '.
End frame: 0x0D 0x0A.
As shown in figure 3, U1 is central processing unit STM32F103ZET6, pin 3 and pin 4 are connect by capacitor C3, C4
The low speed crystal oscillator of 32.768KHz provides counting to internal system clock, and pin 5 and pin 6 pass through resistance R4 and capacitor C5, C6
The high speed crystal oscillator for meeting 8MHz runs to system and provides starting of oscillation.
It is illustrated in figure 4 voltage conversion circuit, alarm is (fully charged to be about using the lithium manganate battery for being nominally 3.7V
4.2V), the operating voltage of system is 3.3V, and the general pressure drop of the voltage conversion chip of mainstream is not suitable for all in 1V or so on the market
This system design, compares by type selecting, selects the chip of model TPS79533 as the voltage conversion chip of this system, pressure drop
Only 0.3V, while current capacity is 500mA, can stablize and export 3.3V voltage to system power supply.
It is illustrated in figure 5 voltage control circuit, RT9193-33GB is switch IC.When the systems are operating normally, pass through
RT9193-33GB exports 3.3V voltage to laser probe 500, OLED display module 700, wireless module 600, data storage circuitry
800 power supplies；When system is in standby, voltage output is turned off by RT9193-33GB, stops the confession to other modules
Electricity reduces the power consumption of whole system.
As shown in fig. 6, key_PWR is power button lead, a key circuit is combined into VCC3.3 lead；key_up
For upper key lead, key_down is lower key lead, and key_menu is menu key lead, and key_T is to determine key lead,
Key_C is to return to key lead, this five key leads share GND lead and are combined into respective key circuit.Fig. 7 be according to by
The film key trace-diagram of key interface principle design.
It is illustrated in figure 8 data storage circuitry, realizes the parameter of alarm, the storage of system log, it is convenient to use
The storage of the logs such as various events, alarm, mistake, setting in journey, while storing the warning concentration of setting, calibration parameter, adjusting
Zero parameter.Memory module uses ferroelectricity EEPROM, the model FM25V02A-GTR of a piece of 32K Byte, it uses SPI interface
Communication, clock speed are up to 40MHz；Super low-power consumption is 5uA, the read-write cycle of 14 powers more than 10, the data more than 10 years
Holding time.
As shown in figure 9, the display screen 3 of one piece of high definition of the use of OLED display module 700, high brightness, self-luminous OLED, are based on
Display module, system realize a whole set of system of displayed menus include: battery capacity is shown, time showing, methane concentration are shown,
The functions such as parameter setting.Display screen is connected by SPI mode with CUP.
As shown in Figure 10, P3 is row's seat of a 1*5, the model LRCS01-010 of laser probe 600, its end RXD
Mouth is connect by arranging seat with the UART1_TX of STM32 microprocessor 100, and TXD is connect with UART1_RX, realizes that data transmit function
Energy.Pass through buzzer and LED(alarm lamp simultaneously) realize sound and light of alarm.
It is as shown in figure 11 sound light alarming circuit, the I/O pin of STM32 microprocessor 100 drives after expanding stream by triode
Buzzer.
As shown in figure 12 it is voltage detecting circuit, because the reference voltage of STM32 microprocessor 100 is 3.3V, and inputs
Voltage is greater than 3.3V, it is therefore desirable to which two resistance are divided, and are drawn after partial pressure with the inside A/D of STM32 microprocessor 100 conversion
Foot connection.
Figure 13 is wireless module circuit, and wireless module 600 is realized the data exchange between this equipment and InterWorking Equipment, passed through
It in real time transmits on-site data gathering, is able to achieve the extension and customization of system level function.The alarm is wireless using ESP8266
Serial ports WIFI module passes through serial ports and MCU(or other serial equipments) it communicates, built-in ICP/IP protocol stack can be realized serial ports
Conversion between WIFI, while can also be matched with the radio network gateway in safety monitoring system, it uploads in data to ground
Position machine, further ensures the safety in production of coal mine.
Figure 14 is software overall framework figure, and Design of System Software is divided into application layer, driving layer and physical layer.Application layer is main
It is that the function code of display interface is write, driving layer is mainly hardware device (such as display screen, storage chip, clock chip)
Drive code set is write, and physical layer is mainly the configuration code for the GPIO mouth (such as SPI, I2C, UART) connecting with hardware device
Write.
Figure 15 is software workflow figure, is initialized after system boot, and is carried out certainly to functions such as clock, alarm, probes
Inspection enters main interface after self-test success, by menu interface is entered after Menu key, can carry out zeroing setting, calibration is arranged, alarm is set
It sets, time setting, brightness regulation, System self-test, radio function setting, while can also check the function such as current voltage, probe temperature
Energy.
Although being particularly shown and describing the utility model referring to its exemplary embodiment, the technology of this field
Personnel, can be to it should be understood that in the case where not departing from the spirit and scope of the utility model defined by claim
It carries out various changes of form and details.
Claims (5)
1. a kind of coal mine detects alarm with portable mobile wireless laser methane, it is characterised in that: including shell (1), circuit board, swash
Light probe (500) and OLED display module (700) and film key (2) on shell (1) is set, is provided on circuit board
STM32 microprocessor (100) and the crystal oscillating circuit (200) being connected with STM32 microprocessor (100), power circuit (300),
Key circuit (400), wireless module (600), OLED display module (700), data storage circuitry (800), sound light alarming circuit
(801) it is connected with voltage detecting circuit (802), laser probe (500) with the input terminal of STM32 microprocessor (100), film is pressed
Key (2) is connected with key circuit (400).
2. a kind of coal mine according to claim 1 detects alarm with portable mobile wireless laser methane, it is characterised in that: institute
It states and is provided on shell (1) air inlet window (4), the nano material of one layer of water proof and dust proof is inlayed in the inside of air inlet window (4).
3. a kind of coal mine according to claim 1 detects alarm with portable mobile wireless laser methane, it is characterised in that: institute
The side for stating shell (1) is provided with rear cover, the one circle groove of joint design of the shell (1) and the rear cover, and groove embeds
Sealing strip.
4. a kind of coal mine according to claim 1 detects alarm with portable mobile wireless laser methane, it is characterised in that: institute
It states shell (1) and is integrated injection molding, material therefor is PC plastic and ABS plastic mixture.
5. a kind of coal mine according to claim 1 detects alarm with portable mobile wireless laser methane, it is characterised in that: institute
It states laser probe (500) and the wireless module (600) to be connected using UART interface with the STM32 microprocessor (100), institute
OLED display module (700) and the data storage circuitry (800) are stated using SPI interface and the STM32 microprocessor (100)
It is connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821750473.3U CN209182230U (en) | 2018-10-27 | 2018-10-27 | A kind of coal mine portable mobile wireless laser methane detection alarm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821750473.3U CN209182230U (en) | 2018-10-27 | 2018-10-27 | A kind of coal mine portable mobile wireless laser methane detection alarm |
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| CN209182230U true CN209182230U (en) | 2019-07-30 |
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| CN201821750473.3U Active CN209182230U (en) | 2018-10-27 | 2018-10-27 | A kind of coal mine portable mobile wireless laser methane detection alarm |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112013901A (en) * | 2020-08-26 | 2020-12-01 | 广东电网有限责任公司广州供电局 | Distribution network inspection system |
| CN113252849A (en) * | 2021-05-13 | 2021-08-13 | 河南中煤电气有限公司 | Method for solving zero return and adjusting TRIZ of panel of methane detection alarm |
-
2018
- 2018-10-27 CN CN201821750473.3U patent/CN209182230U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112013901A (en) * | 2020-08-26 | 2020-12-01 | 广东电网有限责任公司广州供电局 | Distribution network inspection system |
| CN113252849A (en) * | 2021-05-13 | 2021-08-13 | 河南中煤电气有限公司 | Method for solving zero return and adjusting TRIZ of panel of methane detection alarm |
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