CN103808365A - Coal field fire area wireless sensor monitoring node - Google Patents
Coal field fire area wireless sensor monitoring node Download PDFInfo
- Publication number
- CN103808365A CN103808365A CN201410053789.7A CN201410053789A CN103808365A CN 103808365 A CN103808365 A CN 103808365A CN 201410053789 A CN201410053789 A CN 201410053789A CN 103808365 A CN103808365 A CN 103808365A
- Authority
- CN
- China
- Prior art keywords
- pin
- circuit
- chip
- monitoring node
- microprocessor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a coal field fire area wireless sensor monitoring node. The coal field fire area wireless sensor monitoring node comprises a wireless microprocessor, a power supply circuit, an external clock, a watchdog member, LED (light-emitting diode) lamp sets, an RS232 (recommend standard 232) serial port, a voltage measuring circuit and a high temperature acquisition circuit. The designed peripheral circuits correspond to monitoring requirements respectively, the functions are specific, and redundant components are omitted. The LED lamp sets are connected with a power supply and the wireless microprocessor through a jumper, the jumper is turned on during debugging, and the jumper is turned off during using, so that energy consumption can be reduced. All circuits and chips are integrated into a circuit board, components are firmly connected, and the working performance is stable. The coal field fire area wireless sensor monitoring node is applicable to coal field fire area monitoring to collect the temperature, ambient temperature and humidity, battery voltage of an underground coal seam in a fire area. The coal field fire area wireless sensor monitoring node has functions of synchronous dormant, watchdog, power protection, brownout detection and the like, and is low in power consumption and long in service life.
Description
Technical field
The invention belongs to technical field of wireless, be specifically related to the hardware circuit of wireless sensor node.
Background technology
Coalfield, because spontaneous combustion brings massive losses, is monitoring disaster situation, coalfield flame range temperature is especially administered to rear flame range temperature and drop to and extinguish or accumulated temperature resume combustion process is monitored.Wireless sensor network, by being arranged in the pyrostat measurement data of flame range, sends to monitoring center through distance transmission system after converging wirelessly, realizes surveying work artificial and that wire transmission method can not complete.Inconvenience is manually changed and keeped in repair to Xinjiang flame range, away from infrastructure,, requires the work that wireless sensor network can be for a long time non-maintaining.
Wireless sensor network application is with strong points, and varying environment needs corresponding wireless sensor node.Prior art is directly applied in the fire area monitoring of coalfield and has problems: (1) wireless senser finished product node [1-2] mostly is exploitation class platform, and rich interface, applies not specific; Peripheral circuit is more, and power consumption is relatively large, in the time of concrete use, need to cut out.(2) document [3] has been described the annexation of the each intermodule of node, does not relate to concrete peripheral support circuit.Node [4] for large-scale emitter exploitation is described peripheral circuit, and towards specific demand, function is specific, inapplicable and coalfield fire area monitoring.(3) base application of conventional chip [5-6] is with power supply, external crystal-controlled oscillation and antenna-matching circuit, can normally carry out wireless receiving and dispatching, but do not possess the functions such as signals collecting, limited the application of node in the fire area monitoring of coalfield, need the supporting peripheral circuit of otherwise designed.
Documents
The .BOCCN-JN51XX-SensorBoardV4.1.pdf[DB/OL of Beijing Bo Kong company].
http://www.bocon.com.cn/.
The Nanjing .CC2530 of Ding Xuan Electronic Science and Technology Co., Ltd. node schematic diagram.
Shanghai Kuandai Telecommunication Technology Development Co., Ltd, department's sky is outstanding. wireless sensor node, utility model patent
Publication number CN201976261U, open day 2011.09.14.
ZhangZhili,ZengXianglin,CaiWei.DesignandRealizationofWirelessSensor
systemforMonitoringLarge-ScaleLaunchingEquipments.ICEMI’2007.
Jennic.JN-DS-JN5139-xxx-Myy1v6[DB/OL].
http://www.jennic.com/support/datasheets/jn5139_module_datasheet,2010-1
TI Co.Ltd. 2530Datasheet[DB/OL].http://www.ti.com.cn/product/cn/cc2530,2010-10
Summary of the invention
The object of the present invention is to provide a kind of coalfield flame range wireless senser monitoring node, there is the functions such as synchronous dormancy, house dog, power protection, detection of power loss, for coal seam temperature, ambient temperature and humidity and the battery voltage monitoring of Xinjiang coalfield's flame range.
In order to solve above technical matters, design of the present invention and monitoring requirements be miniperipheral circuit one to one, reduces dissipative cell, reduces node overall power, and concrete technical scheme is as follows:
A kind of coalfield flame range wireless senser monitoring node, comprise wireless microprocessor (1), power circuit (2), external clock (3), house dog (4), LED lamp group (5), RS232 serial ports (6), tension measuring circuit (7) and high temperature Acquisition Circuit (8), it is characterized in that:
Adopt the wireless microprocessor (1) of integrated wireless radio-frequency module (10) and processor (11) as joint core chip; Power circuit (2) is connected respectively with wireless microprocessor (1), external clock (3), house dog (4), RS232 serial ports (6), tension measuring circuit (7) and high temperature Acquisition Circuit (8), and stabilized voltage supply is provided; External clock (3), house dog (4), RS232 serial ports (6), tension measuring circuit (7), high temperature Acquisition Circuit (8) are connected with wireless microprocessor (1); LED lamp group (5) is connected with power supply, wireless microprocessor (1) respectively by wire jumper (9); All circuit and integrated chip are on a circuit board.
Described power circuit (2) provides 3V stable DC voltage by battery tension after DC-DC voltage stabilizing chip HT7330 conversion; T7330 can also prevent that accumulator from crossing and put.
Described external clock (3) adopts the PCF8563 chip with dual power supply, is connected with wireless microprocessor (1) through I2C interface, and accurate clock is provided.
Described house dog (4) is made up of MAX706 chip and outer member.The DIO11 pin that the WDI pin of MAX706 chip is connected to wireless microprocessor (1) is used for feeding dog, the RESETN pin that the RESET pin of MAX706 chip is connected to wireless microprocessor (1) produces reset signal, and the signal that the PFI pin of MAX706 chip connects after VCC dividing potential drop carries out down Monitor Unit.
The conducting in the time of debugging of the wire jumper (9) of described LED lamp group (5) disconnects in the time of real work.
Described RS232 serial ports (6) adopts SP3232 chip to carry out the conversion of standard RS232 level and Transistor-Transistor Logic level.
Described tension measuring circuit (7) is composed in series by two divider resistances; The input end of tension measuring circuit (7) connects cell voltage, and output terminal connects wireless microprocessor (1).
The present invention has beneficial effect.
(1) the present invention, meeting under the flame range high-temperature data monitoring requirements of coalfield take wireless microprocessor as core, is equipped with minimum peripheral circuit, forms and minimizes node.The all chips of node and circuit are realized on same circuit board, stable connection between element, and stable work in work, Real-time Collection is carried out at the scene that can be deployed in.
(2) the present invention adopts wire jumper to be connected between the LED lamp group of relatively power consumption and power supply and wireless microprocessor.Wire jumper conducting when debugging, LED lamp group shows node power and duty; When actual use, wire jumper disconnects, and saves energy consumption.
(3) house dog of the present invention can prevent that node procedure race from flying, and detection of power loss can make node automatically recover in the time that supply voltage is unstable, prevents that the node that voltage dithering causes from crashing, and guarantees that node works long hours in unattended Xinjiang.
(4) external clock of the present invention provides precision clock, coordinates software can make network dormancy simultaneously and revive, and saves energy consumption.
Accompanying drawing explanation
Fig. 1 is wireless sensor node structural representation of the present invention;
Fig. 2 is wireless sensor node circuit theory diagrams of the present invention.
In figure: 1, wireless microprocessor 2, power circuit 3, external clock 4, house dog 5, LED lamp group 6, RS232 serial ports 7, tension measuring circuit 8, high temperature Acquisition Circuit 9, wire jumper 10, wireless radio frequency modules 11, processor
BAT is that accumulator, Buttoncell are that button cell, VIN are that cell voltage, VCC are supply voltage.
Embodiment
Take JN5139-Z01-M03 wireless microprocessor as joint core chip as example, are elaborated object of the present invention, technical scheme and beneficial effect from design of joints and node circuit principle two aspects for further explaining.
1. wireless senser monitoring node structure of the present invention as shown in Figure 1.
1) wireless microprocessor 1 is selected the JN5139-Z01-M03 that integrates wireless radio frequency modules 10 and processor 11 that Jennic company produces.JN51XX wireless senser family chip operating voltage 2.7～3.6V, receiver sensitivity-96.5dBm, emissive power+2.5dBm, transmitter current < 38mA, received current < 37mA, quiescent current 2.8 μ A, deep-sleep electric current 400nA.32 risc processors of JN5139-Z01-M03 internal integration functions such as scheduling, energy calculating and orthofunction, data fusion, data dump of can executing the task, open 2.4GHz frequency range wireless transceiver and ZigBee operating such, antennal interface adopt uFI interface, and peripheral interface has SPI, I
2c, DIO etc.
2) power circuit 2 is connected with high temperature Acquisition Circuit 8 with wireless microprocessor 1, external clock 3, house dog 4, LED lamp group 5, RS232 serial ports 6, tension measuring circuit 7, and stabilized voltage supply is provided.
3) external clock 3 adopts PCF8563 chip, is connected precision clock is provided with wireless microprocessor 1, coordinates software can make network dormancy simultaneously and revive, and saves energy consumption.Whole node current including peripheral circuit is 48mA under sending mode, under idle pulley, is 20mA, is 0.3mA under park mode.Node is park mode in the time that flame range field by using is long, and collection period is take hour adjustable for unit between 1～24 hour, and each collection period interior nodes is except the dormant state of the off-the-job of setting in extremely low power dissipation, saving energy consumption.In long-time dormancy application, utilize PCF8563 chip can overcome the problem that the larger error of chip internal clock generating causes network synchronously not revive, realize Network Synchronization.
4) house dog 4 adopts MAX706 chip, is connected with wireless microprocessor 1.MAX706 chip is one group of CMOS supervisory circuit, can monitoring power voltage, the duty of battery failures and processor or controller.MAX706 chip is integrated into conventional multiple function in the little chip of a slice 8 pin encapsulation, compared with adopting the circuit of discrete component or simple function chip portfolio, greatly reduce the complicacy of circuit system and the quantity of components and parts, significantly improved system reliability and degree of accuracy.House dog 4 can prevent node procedure " race flies ", and detection of power loss can make node automatically reply in the time that supply voltage is unstable, prevents the deadlock that voltage dithering causes.
5) LED lamp group 5 is connected with wireless microprocessor 1 with power circuit 2 respectively by wire jumper 9.The power consumption of a LED lamp is about 1.5mA, and node dormancy electric current only has 0.3mA, and comparatively speaking, LED lamp group 5 power consumptions are larger.Wire jumper 9 conductings when debugging, show node power and duty by LED lamp group 5; When actual use, wire jumper 9 disconnects, and LED lamp group 5 is closed, and can reduce 4.5mA energy consumption.
6) RS232 serial ports 6 adopts SP3232 chip, is connected with wireless microprocessor 1.Node is connected with PC by RS232 serial ports 6 when downloading in debugging, and aggregation node also use RS232 serial ports 6 is connected forwarding data with GPRS.It is the Transistor-Transistor Logic level pattern that logical one, low level are logical zero that wireless microprocessor 1 adopts high level, and RS232 serial ports to adopt positive high level be 232 level modes that the negative high level of logical zero is logical one, both need could be communicated by letter by level conversion.This example adopts SP3232 chip to convert Transistor-Transistor Logic level to 232 level, and serial interface is DB9 socket.
7) tension measuring circuit 7 will be made up of two divider resistances, send into the ADC1 pin of wireless microprocessor 1 after cell voltage dividing potential drop.
8) high temperature Acquisition Circuit 8 is connected by temperature conditioning chip high-temperature probe with wireless microprocessor 1.High-temperature probe can adopt K type thermopair, and temperature conditioning chip can adopt MAX6675 or MAX31855.High-temperature probe is sent into temperature conditioning chip by the temperature information collecting with analog signal form, forms digital signal transfers to wireless microprocessor 1 after analog to digital conversion.
9) all circuit and chip are all made on a circuit board.
2. node circuit principle of the present invention as shown in Figure 2.
1) JN5139-Z01-M03 has 41 pins, and VDD pin connects VCC.
2) power circuit provides 3.2～3.8V voltage by BAT, is connected into 1 pin of voltage stabilizing chip HT7330 through switch SW 4, insurance F1, and after conversion, by the 2 pin output 3V burning voltage VCC of HT7330, VCC is to all element power supplies in node.
3) between the OSCI pin of PCF8563 chip and OSCO pin, meet the crystal oscillator Y1 of 32.768KHz, provide clock required frequency; Two pins of crystal oscillator Y1 respectively and between ground GND, be connected the load capacitance of a 15pF; The large resistance of a crystal oscillator Y1 10M in parallel.The external dual power supply of VDD pin of PCF8563 chip, is powered to clock chip by VCC when BAT voltage is normal, otherwise is powered by Buttoncell.Diode D7 anti-reverse charging, bilateral diode D8 prevents impulse disturbances, and 100nF and 10 μ F electric capacity strobe, and diode D6 prevents that BAT is to Buttoncell reverse charging.The CLK pin of PCF8563 chip is unsettled, VSS pin ground connection GND, and the DIO10 pin that INT pin meets JN5139-Z01-M03 is used for producing interruption; The SDA pin of PCF8563 chip and SCL pin form I2C interface, are connected into respectively DIO15 pin and the DIO14 pin of JN5139-Z01-M03; Two lines of I2C interface connect respectively and draw resistance R 13 and pull-up resistor R14.When node work, JN5139-Z01-M03 writes PCF8563 chip by I2C interface by recovery time after clock and dormancy, and timing then PCF8563 chip produces look-at-me at INT pin, sends into the DIO10 pin of JN5139-Z01-M03 chip, wakes node up.
4) LED lamp D1 one end meets VCC by current-limiting resistance R1, and the other end is by SW6 ground connection; LED lamp D2 one end meets VCC by current-limiting resistance R2, and the other end connects the DIO16 pin of JN5139-Z01-M03 by SW6; LED lamp D3 one end meets VCC by current-limiting resistance R3, and the other end is connected with the DIO17 pin of JN5139-Z01-M03 by SW6.LED lamp D1 is power light, as long as VCC powers on, LED lamp D1 will light; LED lamp D2 and LED lamp D3 are status indicator lamps, according to user's request self-defining.
5) tension measuring circuit is measured in real time to battery tension, helps observation personnel to understand field power supply actual conditions.When switch SW 4 is closed, VIN is battery tension, and resistance R 36 and resistance R 37, by sending into the ADC1 pin of JN5139-Z01-M03 after VIN dividing potential drop, are carried out analog acquisition.The ADC passage maximum range of JN5139-Z01-M03 is 2.4V, and VIN is 6.8V to the maximum; Resistance R 36 is got 85K Ω, and resistance R 37 is got 27K Ω, and the output voltage after dividing potential drop is 6.8 × R37/ (R36+R37)=1.64V < 2.4V, meets the demands.
6) temperature conditioning chip MAX6675 has 8 pins, and VCC pin connects power supply, GND pin ground connection, the electric capacity filtering noise of the indirect 0.1 μ F of VCC pin and GND pin; T+ pin, the T-pin of MAX6675 are connected with the positive and negative electrode of K type thermopair respectively.Main control unit JN5139-Z01-M03 is connected by SPI mouth with slave unit MAX6675, and wherein the SPICLK pin of JN5139-Z01-M03 and the SCK pin of MAX6675 are connected, and clock signal is provided; The DIO0 pin of JN5139-Z01-M03 and MAX6675's
pin is connected, as sheet choosing; The SPIMISO pin of JN5139-Z01-M03 is connected with the SO pin of MAX6675, receiving digital signals.When
pin level is from high to low when saltus step, and under the clock effect of SCK pin, MAX6675 exports switched binary data from SO pin to JN5139-Z01-M03.The monitor temperature scope of MAX6675 is 0～1023.75 ℃, also replaceable one-tenth MAX31855 chip, and the low temperature of monitoring can expand to-40 ℃.
7) between the VCC pin and GND pin of SP3232, between C1+ pin and C1-pin, between C2+ pin and C2-pin, connect respectively 100nF electric capacity and carry out filtering; V+ pin is by 100nF electric capacity access VCC, and V-pin is by 100nF capacity earth GND.T1IN pin, the R1OUT pin of SP3232 are connected with DIO6 pin, the DIO7 pin of JN5139-Z01-M03 respectively, form the input of a road RS-232 receiver and the output of driver; T2IN pin, the R2OUT pin of SP3232 are connected with DIO5 pin, the DIO4 pin of JN5139-Z01-M03 respectively, form the input of the second road RS-232 receiver and the output of driver.The R1IN pin of SP3232, T1OUT pin, R2IN pin, T2OUT pin are connected respectively at 3 pins, 2 pins, 7 pins, 8 pins of DB9 socket, as the input of two-way TTL/CMOS receiver and the output of driver.5 pin ground connection GND of DB9 socket, all the other pins are unsettled.
8) between the VCC pin of house dog MAX706 chip and GND pin, connect 100 μ F capacitor filterings ,/MR pin is connected by jumper switch JP4 with/WDO pin.When node programming program, JP4 disconnects, and MAX706 does not produce interruption; When node work, JP4 conducting.MAX706 chip /MR pin is connected with RESET pin, connects the RESTETN pin of JN5139-Z01-M03 simultaneously, be used for resetting.MAX706 chip /MR pin is connected by resistance R 20 with VCC, is connected by capacitor C 10 with ground GND, and snap switch SW5 in parallel in capacitor C 10, composition manual reset circuit.When SW5 presses after conducting, MAX706 chip /MR pin drags down, and low level signal is sent into the RESETN pin of JN5139-Z01-M03, produces and resets.The PFI pin connecting resistance R7 of MAX706 chip and the bleeder circuit that resistance R 4 forms, monitoring VCC; If VCC is lower than 2.4V, the voltage of the PFI pin of MAX706 chip can, lower than 1.2V, will produce low level at RESET pin, sends into the RESETN pin of JN5139-Z01-M03, produces and resets.
Above embodiment shows concrete methods of realizing of the present invention, and according to embodiment, explanation can be produced the node for flame range high temp. monitoring.Whole node power consumption in the time of dormancy can be reduced to 0.3mA.
Claims (7)
1. a coalfield flame range wireless senser monitoring node, comprise wireless microprocessor (1), power circuit (2), external clock (3), house dog (4), LED lamp group (5), RS232 serial ports (6), tension measuring circuit (7) and high temperature Acquisition Circuit (8), it is characterized in that:
Adopt the wireless microprocessor (1) of integrated wireless radio-frequency module (10) and processor (11) as joint core chip;
Power circuit (2) is connected respectively with wireless microprocessor (1), external clock (3), house dog (4), RS232 serial ports (6), tension measuring circuit (7) and high temperature Acquisition Circuit (8), and stabilized voltage supply is provided;
External clock (3), house dog (4), RS232 serial ports (6), tension measuring circuit (7), high temperature Acquisition Circuit (8) are connected with wireless microprocessor (1);
LED lamp group (5) is connected with power supply, wireless microprocessor (1) respectively by wire jumper (9);
All circuit and integrated chip are on a circuit board.
2. a kind of coalfield according to claim 1 flame range wireless senser monitoring node, is characterized in that: described power circuit (2) provides 3V stable DC voltage by battery tension after DC-DC voltage stabilizing chip HT7330 conversion; T7330 can also prevent that accumulator from crossing and put.
3. a kind of coalfield according to claim 1 flame range wireless senser monitoring node, is characterized in that: described external clock (3) adopts the PCF8563 chip with dual power supply, through I
2c interface is connected with wireless microprocessor (1), and accurate clock is provided.
4. a kind of coalfield according to claim 1 flame range wireless senser monitoring node, is characterized in that: described house dog (4) is made up of MAX706 chip and outer member;
The DIO11 pin that the WDI pin of MAX706 chip is connected to wireless microprocessor (1) is used for feeding dog, the RESETN pin that the RESET pin of MAX706 chip is connected to wireless microprocessor (1) produces reset signal, and the signal that the PFI pin of MAX706 chip connects after VCC dividing potential drop carries out down Monitor Unit.
5. a kind of coalfield according to claim 1 flame range wireless senser monitoring node, is characterized in that: the conducting in the time of debugging of the wire jumper (9) of described LED lamp group (5) disconnects in the time of real work.
6. a kind of coalfield according to claim 1 flame range wireless senser monitoring node, is characterized in that: described RS232 serial ports (6) adopts SP3232 chip to carry out the conversion of standard RS232 level and Transistor-Transistor Logic level.
7. a kind of coalfield according to claim 1 flame range wireless senser monitoring node, is characterized in that: described tension measuring circuit (7) is composed in series by two divider resistances; The input end of tension measuring circuit (7) connects cell voltage, and output terminal connects wireless microprocessor (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410053789.7A CN103808365A (en) | 2014-02-18 | 2014-02-18 | Coal field fire area wireless sensor monitoring node |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410053789.7A CN103808365A (en) | 2014-02-18 | 2014-02-18 | Coal field fire area wireless sensor monitoring node |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103808365A true CN103808365A (en) | 2014-05-21 |
Family
ID=50705471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410053789.7A Pending CN103808365A (en) | 2014-02-18 | 2014-02-18 | Coal field fire area wireless sensor monitoring node |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103808365A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588870A (en) * | 2016-01-04 | 2016-05-18 | 中国矿业大学 | Device and method for detecting fire zone of coal field on basis of sulfur isotope component ratio |
| CN107314826A (en) * | 2017-08-22 | 2017-11-03 | 沈国青 | A kind of motor temperature monitoring device |
| CN107643902A (en) * | 2017-09-20 | 2018-01-30 | 安徽皖通邮电股份有限公司 | A kind of memory burner |
| CN108513275A (en) * | 2018-03-13 | 2018-09-07 | 浙江水利水电学院 | A kind of Zigbee wireless sensing nodes that live indicating meter is coupled |
| CN110989502A (en) * | 2019-12-16 | 2020-04-10 | 华南理工大学广州学院 | Numerical control laser cutting machine control system based on singlechip |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201497590U (en) * | 2009-07-02 | 2010-06-02 | 西安森兰科贸有限责任公司 | Wireless self network grouping drill hole temperature measurement device for fire of coalfield |
| CN102215602A (en) * | 2011-05-11 | 2011-10-12 | 江苏大学 | Wireless sensor network monitoring node in high-temperature coalfield fire area at 130-1000 DEG C and monitoring method thereof |
| CN103310619A (en) * | 2013-07-08 | 2013-09-18 | 江苏大学 | Wireless sensor network node used for temperature monitoring and temperature monitoring method |
| CN103442418A (en) * | 2013-08-28 | 2013-12-11 | 江苏大学 | High-temperature data collection and synchronous hibernation control method of CC2530 nodes in coal field fire area |
| CN203687995U (en) * | 2014-02-18 | 2014-07-02 | 江苏大学 | Coal-field fire-area wireless sensor monitoring node |
-
2014
- 2014-02-18 CN CN201410053789.7A patent/CN103808365A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201497590U (en) * | 2009-07-02 | 2010-06-02 | 西安森兰科贸有限责任公司 | Wireless self network grouping drill hole temperature measurement device for fire of coalfield |
| CN102215602A (en) * | 2011-05-11 | 2011-10-12 | 江苏大学 | Wireless sensor network monitoring node in high-temperature coalfield fire area at 130-1000 DEG C and monitoring method thereof |
| CN103310619A (en) * | 2013-07-08 | 2013-09-18 | 江苏大学 | Wireless sensor network node used for temperature monitoring and temperature monitoring method |
| CN103442418A (en) * | 2013-08-28 | 2013-12-11 | 江苏大学 | High-temperature data collection and synchronous hibernation control method of CC2530 nodes in coal field fire area |
| CN203687995U (en) * | 2014-02-18 | 2014-07-02 | 江苏大学 | Coal-field fire-area wireless sensor monitoring node |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588870A (en) * | 2016-01-04 | 2016-05-18 | 中国矿业大学 | Device and method for detecting fire zone of coal field on basis of sulfur isotope component ratio |
| CN105588870B (en) * | 2016-01-04 | 2018-07-20 | 中国矿业大学 | A kind of coal-field fire detection device and method based on sulfur isotope component ratio |
| CN107314826A (en) * | 2017-08-22 | 2017-11-03 | 沈国青 | A kind of motor temperature monitoring device |
| CN107643902A (en) * | 2017-09-20 | 2018-01-30 | 安徽皖通邮电股份有限公司 | A kind of memory burner |
| CN108513275A (en) * | 2018-03-13 | 2018-09-07 | 浙江水利水电学院 | A kind of Zigbee wireless sensing nodes that live indicating meter is coupled |
| CN108513275B (en) * | 2018-03-13 | 2020-08-25 | 浙江水利水电学院 | Zigbee wireless sensing node capable of being connected with field indicating instrument |
| CN110989502A (en) * | 2019-12-16 | 2020-04-10 | 华南理工大学广州学院 | Numerical control laser cutting machine control system based on singlechip |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213243599U (en) | BMS low-power consumption dormancy power supply control and awakening circuit | |
| CN103808365A (en) | Coal field fire area wireless sensor monitoring node | |
| CN101841187B (en) | Power management power supply system for electronic electric energy meter | |
| CN101470172A (en) | CMOS battery voltage test device | |
| CN203687995U (en) | Coal-field fire-area wireless sensor monitoring node | |
| CN105226828A (en) | Based on the photovoltaic microgrid system of Internet of Things sensing technology | |
| CN210724306U (en) | Power failure emergency processing system and chip | |
| CN206311783U (en) | A kind of wireless rainfall warning system | |
| CN205029438U (en) | Regional efficiency data acquisition device | |
| CN204600440U (en) | A kind of apparatus for testing body temperature and system | |
| CN212781739U (en) | Thing networking side slope monitoring facilities | |
| CN205429874U (en) | Photovoltaic microgrid system based on thing networking sensing technology | |
| CN212727059U (en) | Photovoltaic energy storage monitoring gateway device based on loRa | |
| CN204406647U (en) | Based on the electronic calendar remote wireless control system of ZigBee | |
| CN113490075A (en) | Miniature bus gateway suitable for intelligent meter reading system | |
| CN210221137U (en) | Low-power consumption humiture collection system based on zigbee | |
| CN103278841A (en) | Low power consumption beta-ray wireless sensing monitoring device and system | |
| CN209895153U (en) | Intelligent motor-pumped well control device | |
| CN203149828U (en) | Processing circuit for remote control receiving signal and household appliance with same | |
| CN204155124U (en) | Distributed environment monitoring and control system | |
| CN205862147U (en) | A kind of controller logic control unit | |
| CN210773961U (en) | Pipeline state detection circuit for water supply and dirt suction of passenger station | |
| CN205566300U (en) | A bluetooth box for wisdom parking area management system | |
| CN219856823U (en) | Fault awakening circuit and vehicle control system | |
| CN203801079U (en) | Coalfield fire area monitoring wireless sensor gateway |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140521 |
|
| RJ01 | Rejection of invention patent application after publication |