CN105488970A - Multiple data acquisition wireless radio frequency node based on microcontroller - Google Patents
Multiple data acquisition wireless radio frequency node based on microcontroller Download PDFInfo
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- CN105488970A CN105488970A CN201410472354.6A CN201410472354A CN105488970A CN 105488970 A CN105488970 A CN 105488970A CN 201410472354 A CN201410472354 A CN 201410472354A CN 105488970 A CN105488970 A CN 105488970A
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Abstract
The present invention discloses production of a novel radio frequency node through combination of a microcontroller technology, a radio frequency identification technology (RFID), a temperature and humidity sensor, a gas sensor and other equipment. The novel radio frequency node comprises a sending terminal node and a receiving terminal node. The hardware circuit mainly comprises six parts such as a microcontroller and a minimum system thereof, a RFID radio frequency module, a temperature and humidity sensor, a gas sensor, a low voltage alarm circuit, and a serial interface communication circuit. According to the present invention, the low-power-consumption chip STC12LE5604AD is used, the RFID radio module uses NRF24L01 as the radio module chip, the wireless radio frequency technology is used to send data, and real time communication with the receiving node containing the reader is performed; the DHT11 temperature and humidity sensor is used to monitor the ambient temperature and the ambient temperature humidity, and the sends to the master computer so as to be displayed; the MQ-2 gas sensor is used to detect the ambient gas concentration, and sends to the master computer so as to be displayed; and according to the procedure set, when the sending terminal node is not detected, the receiving terminal node can perform alarm prompt, and the prompt can be displayed on master computer.
Description
Technical field
the present invention relates to a kind of data acquisition system (DAS), particularly one SCM Based many data acquisitions less radio-frequency node system.
Background technology
radio-frequency nodes is made up of coupling element and chip, utilizes automatic identification technology, obtains data by radiofrequency signal identification target.Further, other sensors of accessible site, as aid, provide more how available information.In sum, radio-frequency nodes is using radio-frequency (RF) identification as basic function, and comprises the equipment that other sensors provide subsidiary function.According to the difference of node power supply mode, radio-frequency nodes can be divided into active radio frequency node, radio-frequency nodes and half passive RF node.Active radio frequency node is built with battery, and passive RF node does not have internal battery, and half passive RF node section relies on battery operated.Short-range radio frequency identification product is not afraid of the rugged environment such as oil stain, contamination by dust, can continuous firing in this environment, functional.Long distance radio frequency identification product is used in traffic, and decipherment distance can reach tens meters, as automatic charging or identification testing vehicle register etc.
Summary of the invention
the object of this invention is to provide one in conjunction with equipment such as singlechip technology, REID (RFID), Temperature Humidity Sensor, gas sensors, make a New-type radio-frequency node, comprise sender node and receiving terminal node.
the object of the present invention is achieved like this:
a kind of SCM Based many data acquisitions less radio-frequency node, comprise hardware circuit, transmitting terminal, receiving end, is characterized in that: hardware circuit forms primarily of 6 parts: single-chip microcomputer and minimum system, RFID radio-frequency module, Temperature Humidity Sensor, gas sensor, low-voltage alarm circuit, serial communication circuit; Transmitting terminal is divided into five parts: single-chip microcomputer, RFID radio-frequency module, DHT11 Temperature Humidity Sensor, MQ-2 gas sensor, low-voltage alarm circuit; Receiving end is divided into four parts: single-chip microcomputer, RFID radio-frequency module, serial communication modular, low-voltage alarm circuit.
described single-chip microcomputer adopts low-power chip STC12LE5604AD, and RFID radio-frequency module adopts NRF24L01 as radio frequency chip and adopts wireless radio-frequency to send data, carries out real-time Communication for Power with the receiving node comprising reader.
in described transmitting terminal, single-chip microcomputer is as control core; RFID radio-frequency module can complete the radio-frequency (RF) identification of transmitting terminal and receiving end; DHT11 Temperature Humidity Sensor mainly completes the monitoring to environment temperature and humidity, and MQ-2 gas sensor mainly completes the monitoring to environmental gas concentration; Low-voltage alarm circuit can remind user to change battery in time, in order to avoid make node normally work when using powered battery.
in described receiving end, single-chip microcomputer is as control core; RFID radio-frequency module can complete the radio-frequency (RF) identification of transmitting terminal and receiving end; Serial communication can be sent to host computer display data; Low-voltage alarm circuit can remind user to change battery in time, in order to avoid make node normally work when using powered battery.
the essential core device of described low-voltage alarm circuit is a TL431 voltage reference chip, and chip has 3 pins, similar with common triode.The effect of low-voltage alarm circuit is, node circuit lower at cell voltage when cannot normally work, and to user's prompting, changes battery in time.
during described whole system work, be divided into sender node and receiving terminal node; Transmitting terminal is placed in environment, by DHT11, MQ-2 monitoring of environmental humiture and gas concentration respectively, after receiving correct verification msg, sends packet to receiving end; Its course of work is: single-chip microcomputer initialization->NRF24L01 initialization-> detects Temperature Humidity Sensor, gas sensor data processing-> transfers receiving mode to, after waiting for that verification msg-> verification msg is correct, transfer sending mode-> transmission data-> to and complete; After receiving terminal system starts, send verification msg, transfer receiving mode to after correct, receive the data from transmitting terminal, and send data to host computer; The course of work is as follows: single-chip microcomputer initialization-> serial ports initialization->NRF24L01 initialization-> sending mode, send authorization information-> and transfer receiving mode to, complete-> reading buffer area data Deng pending data-> data receiver, be sent to host computer-> display-> by serial ports and terminate.
the radio-frequency nodes hardware circuit that the present invention is based on single-chip microcomputer forms primarily of 6 parts: single-chip microcomputer and minimum system, RFID radio-frequency module, Temperature Humidity Sensor, gas sensor, low-voltage alarm circuit, serial communication circuit.The present invention adopts low-power chip STC12LE5604AD, and RFID radio-frequency module adopts NRF24L01 as radio frequency chip and adopts wireless radio-frequency to send data, carries out real-time Communication for Power with the receiving node comprising reader; Utilize DHT11 Temperature Humidity Sensor monitoring of environmental temperature and humidity, and be sent to host computer display; Utilize MQ-2 gas sensor testing environment gas concentration, and be sent to host computer display; According to program setting, when sender node is not detected, receiving terminal node can carry out alarm, and shows on host computer.
advantage of the present invention and effect:
the many data acquisitions less radio-frequency node that the present invention is based on single-chip microcomputer can realize gathering the important informations such as environment temperature, humidity, gas concentration, and carries out wireless transmission, finally reaches the function of data analysis.This radio-frequency nodes module can be widely used in logistic storage, medical environment monitoring and safety of medicine and the field such as deposit, and has very wide application prospect.
Accompanying drawing explanation
fig. 1 is RFID radio frequency sender node overall design block diagram;
fig. 2 is RFID radio frequency reception end node overall design block diagram;
fig. 3 is warning circuit schematic diagram;
fig. 4 is main program flow chart.
Embodiment
below in conjunction with accompanying drawing citing, the present invention is described in more detail:
composition graphs 1, Fig. 1 is RFID radio frequency sender node overall design block diagram.Transmitting terminal is divided into five parts, and wherein, single-chip microcomputer is as control core; RFID radio-frequency module can complete the radio-frequency (RF) identification of transmitting terminal and receiving end; DHT11 Temperature Humidity Sensor mainly completes the monitoring to environment temperature and humidity, and MQ-2 gas sensor mainly completes the monitoring to environmental gas concentration; Low-voltage alarm circuit can remind user to change battery in time, in order to avoid make node normally work when using powered battery.
composition graphs 2, Fig. 2 is RFID radio frequency reception end node overall design block diagram.Receiving end is divided into four parts, and wherein, single-chip microcomputer is as control core; RFID radio-frequency module can complete the radio-frequency (RF) identification of transmitting terminal and receiving end; Serial communication can be sent to host computer display data; Low-voltage alarm circuit can remind user to change battery in time, in order to avoid make node normally work when using powered battery.
composition graphs 3, Fig. 3 is warning circuit schematic diagram.The effect of low-voltage alarm circuit is, node circuit lower at cell voltage when cannot normally work, and to user's prompting, changes battery in time.The essential core device of warning circuit is a TL431 voltage reference chip, and chip has 3 pins, similar with common triode, and when higher than assigned voltage, the 3rd pin of TL431 has pull-down current, and LED is luminous, represents that battery is normal; When voltage is lower than assigned voltage, the tripod of TL431 does not have pull-down current, triode Q1 not conducting, now triode Q2 meeting conducting, buzzer warning.
Composition graphs 4, Fig. 4 is main program flow chart.During whole system work, be divided into sender node and receiving terminal node.Transmitting terminal is placed in environment, by DHT11, MQ-2 monitoring of environmental humiture and gas concentration respectively, after receiving correct verification msg, sends packet to receiving end.Its course of work is: single-chip microcomputer initialization->NRF24L01 initialization-> detects Temperature Humidity Sensor, gas sensor data processing-> transfers receiving mode to, after waiting for that verification msg-> verification msg is correct, transfer sending mode-> transmission data-> to and complete; After receiving terminal system starts, send verification msg, transfer receiving mode to after correct, receive the data from transmitting terminal, and send data to host computer.The course of work is as follows: single-chip microcomputer initialization-> serial ports initialization->NRF24L01 initialization-> sending mode, send authorization information-> and transfer receiving mode to, complete-> reading buffer area data Deng pending data-> data receiver, be sent to host computer-> display-> by serial ports and terminate.
Claims (6)
1. SCM Based many data acquisitions less radio-frequency node, comprise hardware circuit, transmitting terminal, receiving end, is characterized in that: hardware circuit forms primarily of 6 parts: single-chip microcomputer and minimum system, RFID radio-frequency module, Temperature Humidity Sensor, gas sensor, low-voltage alarm circuit, serial communication circuit; Transmitting terminal is divided into five parts: single-chip microcomputer, RFID radio-frequency module, DHT11 Temperature Humidity Sensor, MQ-2 gas sensor, low-voltage alarm circuit; Receiving end is divided into four parts: single-chip microcomputer, RFID radio-frequency module, serial communication modular, low-voltage alarm circuit.
2. one according to claim 1 SCM Based many data acquisitions less radio-frequency node, it is characterized in that: described single-chip microcomputer adopts low-power chip STC12LE5604AD, RFID radio-frequency module adopts NRF24L01 as radio frequency chip and adopts wireless radio-frequency to send data, carries out real-time Communication for Power with the receiving node comprising reader.
3. one according to claim 1 SCM Based many data acquisitions less radio-frequency node, is characterized in that: in transmitting terminal, single-chip microcomputer is as control core; RFID radio-frequency module can complete the radio-frequency (RF) identification of transmitting terminal and receiving end; DHT11 Temperature Humidity Sensor mainly completes the monitoring to environment temperature and humidity, and MQ-2 gas sensor mainly completes the monitoring to environmental gas concentration; Low-voltage alarm circuit can remind user to change battery in time, in order to avoid make node normally work when using powered battery.
4. one according to claim 1 SCM Based many data acquisitions less radio-frequency node, is characterized in that: in receiving end, single-chip microcomputer is as control core; RFID radio-frequency module can complete the radio-frequency (RF) identification of transmitting terminal and receiving end; Serial communication can be sent to host computer display data; Low-voltage alarm circuit can remind user to change battery in time, in order to avoid make node normally work when using powered battery.
5. one according to claim 1 SCM Based many data acquisitions less radio-frequency node, is characterized in that: the core devices of low-voltage alarm circuit is a TL431 voltage reference chip, and chip has 3 pins.
6. one according to claim 1 SCM Based many data acquisitions less radio-frequency node, is characterized in that: during whole system work, be divided into sender node and receiving terminal node; Transmitting terminal is placed in environment, by DHT11, MQ-2 monitoring of environmental humiture and gas concentration respectively, after receiving correct verification msg, sends packet to receiving end; Its course of work is: single-chip microcomputer initialization->NRF24L01 initialization-> detects Temperature Humidity Sensor, gas sensor data processing-> transfers receiving mode to, after waiting for that verification msg-> verification msg is correct, transfer sending mode-> transmission data-> to and complete; After receiving terminal system starts, send verification msg, transfer receiving mode to after correct, receive the data from transmitting terminal, and send data to host computer; The course of work is as follows: single-chip microcomputer initialization-> serial ports initialization->NRF24L01 initialization-> sending mode, send authorization information-> and transfer receiving mode to, complete-> reading buffer area data Deng pending data-> data receiver, be sent to host computer-> display-> by serial ports and terminate.
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| CN201410472354.6A CN105488970A (en) | 2014-09-17 | 2014-09-17 | Multiple data acquisition wireless radio frequency node based on microcontroller |
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| CN201410472354.6A CN105488970A (en) | 2014-09-17 | 2014-09-17 | Multiple data acquisition wireless radio frequency node based on microcontroller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095150A (en) * | 2019-04-19 | 2019-08-06 | 昆明理工大学 | A kind of SCM Based temperature and humidity monitoring system |
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| CN103067941A (en) * | 2012-12-26 | 2013-04-24 | 武汉大学 | Multivariable distributed type online monitoring system based on wireless sensor network |
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Patent Citations (4)
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| CN101476913A (en) * | 2009-02-17 | 2009-07-08 | 北京市农林科学院 | Wireless stem flow sensor and its control method |
| CN201628769U (en) * | 2010-02-08 | 2010-11-10 | 上海和为科技有限公司 | Prison RFID electronic wrist strap |
| CN201819897U (en) * | 2010-04-05 | 2011-05-04 | 江苏瑞新科技股份有限公司 | Wireless data-transmission temperature-humidity sensor with electronic tag |
| CN103067941A (en) * | 2012-12-26 | 2013-04-24 | 武汉大学 | Multivariable distributed type online monitoring system based on wireless sensor network |
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