CN111243252A - Ultra-low power consumption wireless switch signal monitoring system - Google Patents

Ultra-low power consumption wireless switch signal monitoring system Download PDF

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Publication number
CN111243252A
CN111243252A CN201811345928.8A CN201811345928A CN111243252A CN 111243252 A CN111243252 A CN 111243252A CN 201811345928 A CN201811345928 A CN 201811345928A CN 111243252 A CN111243252 A CN 111243252A
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processor
port
ultra
monitoring system
wireless communication
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CN201811345928.8A
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CN111243252B (en
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杜明星
张文雨
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Shanghai Hangjing Electronic Technology Co Ltd
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Shanghai Hangjing Electronic Technology Co Ltd
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C2201/00—Transmission systems of control signals via wireless link
    • G08C2201/10—Power supply of remote control devices
    • G08C2201/12—Power saving techniques of remote control or controlled devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transceivers (AREA)

Abstract

The invention provides an ultra-low power consumption wireless switch signal monitoring system, which relates to the field of switch signal monitoring, and comprises a transmitter and a receiver, wherein the transmitter comprises a plurality of level monitoring ports, a power supply input port, a first processor connected with the level monitoring ports and the power supply input port, and a first wireless communication unit connected with the first processor; the receiver comprises a second wireless communication unit in communication connection with the first wireless communication unit, a second processor connected with the second wireless communication unit, and a signal output unit connected with the second processor. The invention solves the problems that the receiver in the prior art cannot monitor the state quantity of the switch and the electric quantity of the battery in real time, so that the battery is seriously consumed, a program needs to be recompiled when the switch node is accessed and changed, and the efficiency and the stability of the wireless switch are low.

Description

Ultra-low power consumption wireless switch signal monitoring system
Technical Field
The invention relates to the field of switch signal monitoring, in particular to an ultra-low power consumption wireless switching value monitoring system.
Background
In the industrial automatic generation process, the electric equipment is provided with a switch monitoring system, the switch monitoring system comprises a wired switch monitoring system and a wireless switch monitoring system, the wired switch monitoring system needs to arrange corresponding circuits, time and labor are wasted, the wireless switch monitoring system does not need to be wired, and the use is convenient.
However, the existing wireless switch monitoring system has the following disadvantages:
(1) when the wireless switch key is pressed down, the transmitter sends a control signal, the receiver receives the control signal to indicate that the switch key is pressed down once, wherein, the receiver can only collect the pressing times of the control signal sent by the transmitter, how long the key is pressed down and when the key is bounced up, the receiver can not monitor, so that the wireless switch is always in a working state, the electric quantity of the battery is seriously consumed, the service life of the battery is influenced,
(2) the power of the battery of the transmitter is not monitored, resulting in an unexpected power failure of the transmitter, resulting in data loss.
(3) When the requirement of the wireless switch node is changed, the program needs to be recompiled, so that the efficiency and stability of the wireless switch are low, and the normal generation and use are influenced.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an ultra-low power consumption wireless switching value monitoring system, which is used to solve the problems in the prior art that the receiver cannot monitor the switching state quantity and the electric quantity of the battery in real time, so that the battery consumption is severe, and the access of the switching node needs to be recompiled when being changed, so that the efficiency and stability of the wireless switch are low.
In order to achieve the above and other related objects, the present invention provides an ultra-low power consumption wireless switch signal monitoring system, which includes a transmitter and a receiver, the transmitter including a plurality of level monitoring ports for monitoring a switch state quantity, a power input port for supplying power to the entire transmitter, a first processor connected to the level monitoring ports and the power input port for detecting a state change of the level monitoring ports and power information of the power input port, and a first wireless communication unit connected to the first processor for transmitting port state and power information detection data in real time; the receiver comprises a second wireless communication unit which is in communication connection with the first wireless communication unit and used for receiving port state and electric quantity information detection data, a second processor which is connected with the second wireless communication unit and used for analyzing and processing the port state and electric quantity information detection data, and a signal output unit which is connected with the second processor and used for outputting on-off state quantity signals.
Further, the level monitoring port and the power input port are connected with an interrupt input pin of the first processor.
Further, the receiver further comprises a power conversion unit for providing stable 3.3V and 5V supply voltages.
Furthermore, the signal output unit comprises a serial port signal output unit and a relay signal output unit.
Further, the relay signal output unit comprises a plurality of relay modules, each relay module comprises two resistors, two diodes, a triode and a relay, the anode of the first diode is connected with a signal output pin of the on-off state quantity of the second processor, the cathode of the first diode is connected with the base of the triode, the emitter of the triode is grounded, the collector of the triode is connected with the anode of the second diode, the cathode of the second diode is connected with the 24V power supply, two ends of an input pin of the relay are connected with the second diode in parallel, and the output pin of the relay is connected with the PLC through an output port.
Further, the serial port signal output unit comprises an RS232 level conversion chip connected with a serial port of the second processor, and the RS232 level conversion chip is connected with the upper computer through an RS 232D-type port.
Further, the relay module and the transmitter realize the output of the switch state quantity signal in a one-to-many or many-to-one mode.
As described above, the full inventive name of the present invention has the following advantageous effects:
1. in the invention, the processors of the transmitter and the receiver and the wireless communication unit all adopt low-power consumption chips, so that the wireless switch can always keep an ultra-low-power consumption working state.
2. In the invention, the emitter detects the electric quantity information of the power access port, realizes low-voltage alarm of the emitter, is convenient for the emitter to replace the power supply in advance and maintains the normal and stable work of a switch system.
3. In the invention, the automatic identification technology of the switch node of the emitter is adopted, so that the node access of the switch signal monitoring system is simpler, and the working efficiency and the stability of the signal monitoring system are enhanced.
4. In the invention, the real-time wireless communication between the transmitter and the receiver is realized by adopting channel idle detection and frequency modulation technology, and the effective signal of the wireless switch is ensured to be transmitted to the receiver.
5. According to the invention, the receiver can simultaneously support relay signal output and serial port signal output of the switch state quantity.
Drawings
FIG. 1 is a circuit diagram of a transmitter processor and a level monitor port disclosed in an embodiment of the present invention;
FIG. 2 is a diagram of a wireless communication unit and peripheral circuitry of a transmitter according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of a receiver processor and a wireless communication unit according to an embodiment of the present invention;
fig. 4 is a circuit connection diagram of the relay module disclosed in the embodiment of the invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than the number, shape and size of the components in practical implementation, and the type, amount and ratio of the components in practical implementation may be changed arbitrarily, and the layout of the components may be complicated.
The invention provides an ultra-low power consumption wireless switch signal monitoring system, the system includes the launcher and receiver, the said launcher includes a plurality of level monitoring ports J3-J6 used for monitoring the switching state quantity, the power input port J2 used for supplying power to the whole launcher, connect the first processor U6 used for detecting the state change of the level monitoring port J3-J6 and the electric quantity information of the power input port J2 with the level monitoring port J3-J6, power input port J2, and connect the first wireless communication unit U5 used for the real-time sending of port state and electric quantity information detection data with the first processor U6; the level monitor ports J3-J6, the power input port J2 are connected with interrupt input pins of the first processor U6.
As shown in fig. 1, the specific circuit of the transmitter is as follows: level monitor ports J3-J6 (the number of the level monitor ports is not limited to 4) are respectively arranged at two ends of the switch and used for monitoring the state quantity of the switch, 1 pin of each of the level monitor ports J3-J6 is respectively connected with 12 pins, 11 pins, 10 pins and 9 pins of the first processor U6 and is grounded after passing through capacitors C47, C48, C49 and C50, and 2 pins of each of the level monitor ports J3-J6 are grounded after passing through resistors R33, R34, R35 and R36.
Wherein, the resistors R33-R36 respectively play a current limiting role, and the capacitors C47-C50 respectively play a filtering role.
As shown in fig. 2, the power input port J2 is used for connecting a battery, and pin 2 of the power output port J2 is connected to the cathode of the diode D26, the signal input terminal of the regulator chip U6, the capacitors C33, C34, C35, C37, C38, C39, C41, C55, C54, C53, C52, C51, the 16 pin of the first processor U6, the 4 pin, the 9 pin, the 11 pin, the 14 pin, the 15 pin, and the 18 pin of the first wireless communication unit U5, the signal output terminal of the regulator chip U6 is grounded through the capacitor C31 and connected to one end of the resistor R30, and the other end of the resistor R30 is grounded through the resistor R31 and the capacitor C32, respectively; pin 13 of the first wireless communication unit U5 is connected to one end of a capacitor C36 and an inductor L9, the other end of the inductor L9 is connected to one end of an inductor L8, the other end of the inductor L8 is connected to an inductor L7 and a capacitor C44, the other end of the inductor L7 is connected to capacitors C45 and C46, pin 12 of the first wireless communication unit U5 is connected to one end of a capacitor C43 and an inductor L10, the other end of the capacitor C43 is connected to one end of an inductor L8, and pins SPI-SI, SPI-CLK-S0, CD02 and CSn of the first wireless communication unit U5 and pin 6 are correspondingly connected respectively.
Wherein, the resistor R30 and the resistor R31 are voltage dividing resistors used by the first processor U6 to detect the battery voltage, the resistor C31 is used for filtering, the battery voltage division detection result is more accurate, the diode D26 is TVS protection and prevents the circuit from being broken down due to overhigh voltage, the capacitor C55 and the capacitor C54 are power supply filter capacitors to enable the power supply voltage to be more stable, the voltage stabilizing chip U6 stabilizes the voltage input by the power supply input port J2 at 3.3V, the capacitor C31 and the capacitor C32 are input and output voltage filter capacitors respectively, the capacitors C34, C35, C38, C37, C39, C40 and C41 are used for power supply filtering of the first wireless communication unit U5, the capacitors C36, C42, C43, C44, C45 and C46, the inductors L7, L8, L9 and L10 form a filtering, detecting and impedance matching network of the first wireless communication unit U5, and the crystal oscillator X2, the capacitors CPW37 and CPW38 and the first processor U6 and the internal device provide MH 6 of the first stable processor U5 with accurate frequency.
The receiver comprises a second wireless communication unit U3 which is in communication connection with a first wireless communication unit U6 and used for receiving port state and power information detection data, a second processor U2 which is connected with a second wireless communication unit U3 and used for analyzing and processing the port state and power information detection data, and a signal output unit which is connected with the second processor U2 and used for outputting a switch state quantity signal, and the receiver further comprises a power supply conversion unit used for providing stable 3.3V and 5V power supplies.
As shown in fig. 3, the specific circuit of the receiver is as follows: the power conversion unit mainly comprises a power conversion chip UPW1 and a power conversion chip U1, wherein 1 pin of the power conversion chip UPW1 is respectively connected with one end of an inductor L1 and one end of a capacitor C1, the other end of the inductor L1 is connected with a 24V direct-current power supply, the other end of a capacitor C1 is grounded, the 3 pin and the 5 pin of the power conversion chip UPW1 are grounded, the 2 pin is respectively connected with one end of an inductor L2 and the cathode of a diode D26, the other end of the inductor L2 is grounded, the anode of a diode D26 is grounded, and the 4 pin of the power conversion chip UPW1 outputs stable 5V power supply voltage; a pin 1 of the power conversion chip U1 is grounded, a pin 2 and a pin 4 output stable 3.3V power supply voltage and are connected with the anode of a diode D28, a capacitor C5 and a capacitor C6, and a pin 3 is connected with the cathode of the diode D27, the capacitor C3, the capacitor C4 and the 5V power supply voltage output end respectively.
The input 24V direct current power supply is converted into two power supply voltages of 5V and 3.3V by power supply conversion chips UPW1 and U1, D27 is a power supply protection TVS for preventing the circuit from being damaged due to overhigh input voltage, and D28 is a voltage power supply indicator lamp.
The pins of the SPI-SI, the SPI-CLK SPI-S0, the CD02 and the CSn of the second processor U2 and the second wireless communication unit U3 are correspondingly connected respectively, the pins 4, 9, 11, 14, 15 and 18 of the second wireless communication unit U3 are connected with a 3.3V power supply voltage output end, the pin 13 of the second wireless communication unit U3 is connected with one ends of a capacitor C19 and an inductor L5, the other end of the inductor L5 is connected with one end of an inductor L4, the other end of the inductor L4 is connected with an inductor L3 and a capacitor C13, the other end of the inductor L3 is connected with capacitors C14 and C13, the pin 12 of the first wireless communication unit U3 is connected with one ends of the capacitor C18 and the inductor L6, and the other end of the capacitor C18 is connected with one end of the inductor L5.
Furthermore, the signal output unit comprises a serial port signal output unit and a relay signal output unit.
The serial port signal output unit comprises an RS232 level conversion chip U4 connected with a second processor U2 in a serial port mode, a 16 pin of the level conversion chip U4 is connected with a 5V power supply voltage output end, a 2 pin is grounded through a capacitor C29, a 1 pin and a 3 pin are connected through a capacitor C30, a 15 pin and a 6 pin are connected through a capacitor C28, a 4 pin and a 5 pin are connected through a capacitor C27, a 13 pin and a 14 pin are respectively connected with a 2 pin and a 3 pin of a D-shaped port P2 of the RS232, and the RS232 level conversion chip is connected with an upper computer through a D-shaped port of the RS 232.
As shown in fig. 4, the relay signal output unit includes a plurality of relay modules, which mainly include transistors Q0-Q11, relays J7-J18, and pins 8, 9, 10, 11, 24, 25, 37, 38, 39, 40, 51, 52, and 53 of the second processor U2 are respectively connected to the input terminals of the relay modules, and the output terminals of the relay modules are connected to the output port P1 of the relay.
The relay module and the emitters realize the signal output of the switch state quantity in a one-to-many or many-to-one mode, one emitter is used as one node, and the emitter switch node automatic identification technology is adopted, so that the node access of the switch signal monitoring system is simpler, and the working efficiency and the stability of the signal monitoring system are enhanced.
The working principle of the invention is as follows: the level detection ports J3-J6 (the number of the level monitoring ports is not limited to 4) carry out real-time monitoring on the switch state quantity, monitoring data are input into the first processor U6 in the form of interrupt signals after being subjected to current limiting and filtering processing, the power input port J2 is used for connecting a power supply battery of a transmitter, power information of the power supply battery is input into the first processor U6 in the form of interrupt signals after being subjected to acquisition processing, once the switch state or power information accessed by the level detection ports J3-J6 is changed, the first processor U6 is awakened, the switch state and power information of the level detection ports J3-J6 and the power information of the power input port J2 are monitored, the switch state and power information data are sent to the first wireless communication unit U5 through SPI-SI and SPI-CLK SPI-S0, the first wireless communication unit U5 communicates with the second wireless communication unit U3 of a receiver through high-frequency wireless electromagnetic waves, the second wireless communication unit U3 sends the wirelessly received on-off state and electric quantity information data to the second processor U2 through SPI ports (SPI-SI, SPI-CLK SPI-S0), the second processor U2 processes the received state monitoring data, and controls the relay J7-J18 to move by driving a triode Q0-Q11, the relay signal output port is connected with a PLC controller, the second processor U2 converts TTL signals into RS232 signals through a connected RS232 level conversion chip, and is connected with an upper computer through a D-type port of RS232, so that the relay signal output and the serial port signal output of the on-off state quantity are realized simultaneously.
When the switch state or the power supply battery capacity information accessed by the level detection ports J3-J6 is changed, and the first processor U6 is awakened, the first processor U6 packs the current level monitoring port state and the battery capacity information to enter a sending sequence, before entering the sending sequence, the first processor U6 judges whether the transmitter is registered with the system, if the transmitter is registered with the system, the transmitter directly enters the sending sequence, if the transmitter is not registered with the system, the transmitter enters the system registration sequence, the registration channel is generally in an idle state, the transmitter directly requests registration, the receiver receives the registration request, writes the ID of the transmitter into the FLASH of the second processor U2, returns the registration success information and available signal parameters to the transmitter, then enters the sending sequence, if the registration attempts are unsuccessful, the battery needs to be unplugged to confirm whether the transmitter covers, then re-powering up triggers registration.
When entering a sending sequence, the first processor U6 of the transmitter controls the first wireless communication unit U5 to scan whether the registered channel is idle or not, and sends the port status and the battery power data packet until the channel is idle, if the scanning signals are not idle for many times, the first processor U6 records the time and the port status as historical data, and when the channel is idle, the historical data and the port status and battery power data packet monitored in real time are wirelessly transmitted to the receiver.
In summary, the present invention solves the problems in the prior art that the receiver cannot monitor the switch state quantity and the electric quantity of the battery in real time, which results in severe battery consumption, and the switch node needs to recompile the program when the access is changed, resulting in low efficiency and stability of the wireless switch. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be accomplished by those skilled in the art without departing from the spirit and scope of the present invention as set forth in the appended claims.

Claims (7)

1. An ultra-low power wireless switching signal monitoring system, the system comprising a transmitter and a receiver, characterized in that: the transmitter comprises a plurality of level monitoring ports for monitoring the on-off state quantity, a power input port for supplying power to the whole transmitter, a first processor connected with the level monitoring ports and the power input port and used for detecting the state change of the level monitoring ports and the electric quantity information of the power input port, and a first wireless communication unit connected with the first processor and used for sending port state and electric quantity information detection data in real time; the receiver comprises a second wireless communication unit which is in communication connection with the first wireless communication unit and used for receiving port state and electric quantity information detection data, a second processor which is connected with the second wireless communication unit and used for analyzing and processing the port state and electric quantity information detection data, and a signal output unit which is connected with the second processor and used for outputting on-off state quantity signals.
2. The ultra-low power wireless switch signal monitoring system of claim 1, wherein: the level monitoring port and the power input port are connected with an interrupt input pin of the first processor.
3. The ultra-low power wireless switch signal monitoring system of claim 1, wherein: the receiver further comprises a power conversion unit for providing stable 3.3V and 5V supply voltages.
4. The ultra-low power wireless switch signal monitoring system of claim 1, wherein: the signal output unit comprises a serial port signal output unit and a relay signal output unit.
5. The ultra-low power wireless switch signal monitoring system of claim 4, wherein: the relay signal output unit comprises a plurality of relay modules, each relay module comprises two resistors, two diodes, a triode and a relay, the anode of the first diode is connected with a signal output pin of the on-off state quantity of the second processor, the cathode of the first diode is connected with the base of the triode, the emitting electrode of the triode is grounded, the collecting electrode of the triode is connected with the anode of the second diode, the cathode of the second diode is connected with the 24V power supply, the two ends of the input pin of the relay are arranged in parallel with the second diode, and the output pin of the relay is connected with the PLC through an output port.
6. The ultra-low power wireless switch signal monitoring system of claim 4, wherein: the serial port signal output unit comprises an RS232 level conversion chip connected with a serial port of the second processor, and the RS232 level conversion chip is connected with the upper computer through an RS 232D-type port.
7. The ultra-low power wireless switch signal monitoring system of claim 5, wherein: the relay module and the transmitter realize the output of the switch state quantity signal in a one-to-many or many-to-one mode.
CN201811345928.8A 2018-11-13 2018-11-13 Ultra-low power consumption wireless switch signal monitoring system Active CN111243252B (en)

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CN101835178A (en) * 2010-03-30 2010-09-15 北京必创科技有限公司 Method for realizing remote wireless monitoring and wireless monitoring device
CN204926477U (en) * 2015-09-15 2015-12-30 成都汉康信息产业有限公司 Water resource monitor terminal
CN105469566A (en) * 2015-11-18 2016-04-06 成都秦川科技发展有限公司 An internet-of-things intelligent-gas-meter communication method adopting repeaters for communication
CN208045852U (en) * 2018-01-05 2018-11-02 上海思控智能科技有限公司 Intelligent socket
CN110650451A (en) * 2019-09-20 2020-01-03 嘉兴同禾传感技术有限公司 Wireless low-power-consumption sensing network system for geological disaster early warning and using method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101201973A (en) * 2007-12-11 2008-06-18 上海师范大学 Switch state signal wireless transparent transmission method for mobile mechanism
CN101753874A (en) * 2008-12-03 2010-06-23 深圳Tcl新技术有限公司 Remote controller, TV set and remote controller battery power quantity display method
CN101835178A (en) * 2010-03-30 2010-09-15 北京必创科技有限公司 Method for realizing remote wireless monitoring and wireless monitoring device
CN204926477U (en) * 2015-09-15 2015-12-30 成都汉康信息产业有限公司 Water resource monitor terminal
CN105469566A (en) * 2015-11-18 2016-04-06 成都秦川科技发展有限公司 An internet-of-things intelligent-gas-meter communication method adopting repeaters for communication
CN208045852U (en) * 2018-01-05 2018-11-02 上海思控智能科技有限公司 Intelligent socket
CN110650451A (en) * 2019-09-20 2020-01-03 嘉兴同禾传感技术有限公司 Wireless low-power-consumption sensing network system for geological disaster early warning and using method thereof

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