CN202127426U - Chemical engineering safety monitoring system based on hybrid field bus technology - Google Patents
Chemical engineering safety monitoring system based on hybrid field bus technology Download PDFInfo
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Abstract
The utility model relates to a chemical engineering safety monitoring system based on a hybrid field bus technology. The chemical engineering safety monitoring system comprises a ZigBee network and CAN (Controller Area Network) bus protocol converter, a CAN bus sensor node, a carryon wireless sensor node and a portable wireless sensor node. The CAN bus sensor node is connected with the CAN bus to transmit to the other nodes or a monitoring center through a bus. The carryon wireless sensor node is used for realizing the monitoring on environmental parameters in a large range; and the portable wireless sensor node is arranged in a place where a CAN bus is inconvenient to lay to monitor the environmental parameters. The ZigBee network and CAN bus protocol converter 5-4 is used for transmitting data between a ZigBee network and a CAN bus. The chemical engineering safety monitoring system has the advantages of low cost and low power consumption of operation.
Description
Technical Field
The utility model belongs to the technical field of wireless sensor network, mixed field bus, embedded system, concretely relates to chemical industry safety monitoring system based on mix field bus technique.
Background
With the development of wireless communication technology, wireless communication devices are becoming mature, the cost is further reduced, and a new hybrid wired/wireless field bus (hybrid wired/wireless bus) technology is emerging for solving the monitoring and control problems of many mobile objects, rotating objects and dangerous environment objects in industrial environment and process control environment.
In a chemical enterprise with a severe working environment and high safety production risk, the hybrid field bus technology can be deployed along with an operation field to quickly cover all working sections. When the field workers carry the wireless sensor nodes, the positioning technology of the wireless sensor network can be used for positioning the workers in real time, so that the positions of the workers on the operation field at the accident occurrence moment can be tracked in case of an accident, and an efficient emergency rescue scheme is convenient to design. The modern chemical safety monitoring system based on the hybrid field bus technology comprises a wired/wireless gateway between ZigBee and CAN bus, a ZigBee-based wireless sensor node, a CAN bus-based sensor node and the like.
The wireless sensor nodes can be divided into two types, one type is a portable wireless sensor node, the wireless sensor node is a wireless sensor node carried by a worker and used for monitoring the position, vital signs, surrounding environment parameters and the like of the worker on site, the information can be used for judging the position and the life activity condition of the worker in time in the rescue process, and the monitoring of the environment parameters in a large range can be realized through the movement of the worker on the process site. The other type is a portable wireless sensor node for monitoring environmental and equipment parameters in places where it is temporarily inconvenient to lay a CAN bus, and also responsible for relaying the surrounding staff's carry-on wireless sensor node data.
The CAN bus sensor node CAN provide remote, more reliable and more real-time field environment parameter and equipment parameter monitoring service. Because the production environment of chemical enterprises is severe, factors such as moisture resistance, corrosion resistance, explosion resistance, cost, power consumption, intrinsic safety and the like are fully considered in the design of the CAN bus sensor node. Particularly, the survival ability after the accident occurs is strong, because the information life line is used in the emergency rescue process.
Disclosure of Invention
The utility model aims at providing a chemical industry safety monitoring system based on mix field bus technique to prior art not enough.
The utility model discloses a concrete scheme does:
a chemical industry safety monitoring system based on a hybrid field bus technology comprises: the ZigBee network, the CAN bus protocol converter, the CAN bus sensor node, the portable wireless sensor node and the portable wireless sensor node.
The ZigBee network and CAN bus protocol converter comprises: the device comprises a power management module, a ZigBee wireless communication module, a CAN transmission module and a processor module. The power management module comprises a lithium battery, a 5V voltage conversion circuit, a 3.3V voltage conversion circuit and a 1.8V voltage conversion circuit. The output voltage of the lithium battery JS-7.4V-2.2AH is 7.4V, and 5V, 3.3V and 1.8V voltages are output through the voltage conversion circuit to supply power for other modules on the protocol converter.
And the ZigBee wireless communication module HZ2012 is used for communication among the protocol converter, the portable wireless sensor node and the portable wireless sensor node.
The CAN transmission module consists of a CAN transceiver TJA1040T, a high-speed optical coupler 6N137 and a power isolation unit B0505S. The output of the power isolation unit is used by the CAN transceiver and the high-speed optical coupler; the CAN transceiver is connected with the high-speed optocoupler and used as a transmission channel between the node and the CAN bus.
The processor module adopts an LPC2109 low-power-consumption processor, and a CAN interface of the processor module is connected with a CAN transmission module; and a Universal Asynchronous Receiver/Transmitter (UART) interface is connected with the ZigBee wireless communication module. The processor module is used for controlling the forwarding of data between the CAN bus and the ZigBee network.
The CAN bus sensor node comprises a power management module, an environmental parameter acquisition module, a CAN transmission module and a processor module. The power management module comprises a lithium battery, a 5V voltage conversion circuit, a 3.3V voltage conversion circuit and a 1.8V voltage conversion circuit. The output voltage of the lithium battery JS-7.4V-2.2AH is 7.4V, and 5V, 3.3V and 1.8V voltages are output through the voltage conversion circuit to supply power for other modules on the CAN bus sensor node.
The environment parameter acquisition module consists of a digital air pressure sensor MS5607 and a digital temperature and humidity sensor SHT21 and is used for completing data acquisition of air pressure, temperature and humidity.
The CAN transmission module consists of a CAN transceiver TJA1040T, a high-speed optical coupler 6N137 and a power isolation unit B0505S. The output of the power isolation unit is used by the CAN transceiver and the high-speed optical coupler; the CAN transceiver and the high-speed optical coupler are connected with each other and used as a transmission channel between the node and the CAN bus.
The processor module adopts an LPC2109 low-power-consumption processor, and a CAN interface of the processor module is connected with a CAN transmission module; a Serial Peripheral Interface (SPI) is connected to the digital air pressure sensor; Inter-Integrated Circuit (I)2C) The bus interface is connected with the digital temperature and humidity sensor. The processor module is used for controlling the communication between the node and other nodes on the CAN bus; and controlling the environmental parameter acquisition module, and simply analyzing and processing the acquired environmental parameters.
The portable wireless sensor node comprises a power management module, a parameter acquisition module, a ZigBee wireless communication module, a GPS positioning module and a processor module. The power management module comprises a lithium battery, a 5V voltage conversion circuit, a 3.3V voltage conversion circuit and a 1.8V voltage conversion circuit. The output voltage of the lithium battery JS-7.4V-2.2AH is 7.4V, and 5V, 3.3V and 1.8V voltages are output through the voltage conversion circuit to supply power for other modules on the portable wireless sensor node.
The parameter acquisition module consists of a digital air pressure sensor MS5607, a digital temperature and humidity sensor SHT21 and a physiological information acquisition instrument OEM001 and is used for completing data acquisition of air pressure, temperature, humidity, body temperature, blood oxygen saturation and pulse;
and the ZigBee wireless communication module HZ2012 is used for the communication between the node and the ZigBee network, the CAN bus protocol converter and the portable wireless sensor.
The GPS positioning module comprises an SPI/UART conversion circuit and a GPS module QE-GPS 91. The core of the SPI/UART conversion circuit IS an SC16IS750 chip and IS used for converting an SPI interface of the processor module into a UART interface, the UART interface of the conversion circuit IS connected with the GPS module, and the personnel position information IS acquired through the GPS module.
The processor module adopts an LPC2109 low-power-consumption processor, and two SPI interfaces of the processor module are respectively connected with a GPS positioning module and a digital air pressure sensor; i is2The interface C is connected with a temperature and humidity sensor; the two UART interfaces are respectively connected with the physiological information acquisition instrument and the ZigBee wireless communication module. The processor module is used for controlling the communication between the node ZigBee wireless communication module and the ZigBee network and CAN bus protocol converter and the portable wireless sensor node, controlling the parameter acquisition module and the GPS positioning module, and simply analyzing and processing the acquired parameters.
The portable wireless sensor node comprises a power management module, an environmental parameter acquisition module, a ZigBee wireless communication module and a processor module. The power management module comprises a lithium battery, a 5V voltage conversion circuit, a 3.3V voltage conversion circuit and a 1.8V voltage conversion circuit. The output voltage of the lithium battery JS-7.4V-2.2AH is 7.4V, and 5V, 3.3V and 1.8V voltages are output through the voltage conversion circuit to supply power for other modules on the portable wireless sensor node.
The environment parameter acquisition module consists of a digital air pressure sensor MS5607 and a digital temperature and humidity sensor SHT21 and is used for completing data acquisition of air pressure, temperature and humidity.
And the ZigBee wireless communication module HZ2012 is used for the communication between the nodes and the ZigBee network, the CAN bus protocol converter and the portable wireless sensor nodes.
The processor module adopts an LPC2109 low-power-consumption processor, and a CAN interface of the processor module is connected with a CAN transmission module; the SPI interface is connected with the digital air pressure sensor; i is2The interface C is connected with a temperature and humidity sensor; the UART interface is connected with the ZigBee wireless communication module. The processor module is used for controlling the communication between the node ZigBee wireless communication module and the ZigBee network, the CAN bus protocol converter and the portable wireless sensor node, controlling the environmental parameter acquisition module and simply analyzing and processing the acquired parameters.
Compared with the prior art, the utility model has the main advantages that;
1. the power consumption of the device is low. And the software and hardware of the node equipment are designed with low power consumption, so that the node equipment can run for a long time.
2. The equipment cost is low. For the method of laying the CAN bus in complex environment, the utility model discloses a cost is cheaper.
3. The data processing speed is high, and the upgrading potential is large. The utility model discloses a high performance processor of ARM7 kernel compares traditional equipment data processing ability and improves greatly to the treater peripheral hardware of chooseing for use is abundant, has very big upgrading potentiality.
4. The equipment stability and reliability are high. The device adopts a special industrial grade reset chip to ensure the reliability of the circuit; the CAN transmission module adopts the design of power isolation and optical coupling isolation, and improves the stability and the safety of the node.
5. The equipment adaptability is strong. Each part of the node equipment adopts devices meeting industrial-grade standards, has stronger adaptability in severe environment, fully considers the factors of moisture resistance, corrosion resistance, explosion resistance, intrinsic safety and the like, and adopts the design of protection grade IP66 and explosion-proof grade Ex ia IICT6, so that the equipment after an accident has strong survivability.
Drawings
FIG. 1 is a schematic block diagram of the structure of a ZigBee network and CAN bus protocol converter in the utility model;
FIG. 2 is a schematic block diagram of a CAN bus sensor node structure of the present invention;
FIG. 3 is a schematic block diagram of the structure of the portable wireless sensor node of the present invention;
fig. 4 is a schematic block diagram of a node structure of a portable wireless sensor according to the present invention;
fig. 5 is a schematic view of an overall architecture of an embodiment of the chemical safety monitoring system of the present invention.
Detailed Description
The monitoring system provided by the present invention is further described with reference to the accompanying drawings.
Fig. 1 is a structural schematic block diagram of the protocol converter for the ZigBee network and the CAN bus of the present invention, and the protocol converter includes four parts, namely, a power management module 1-1, a CAN transmission module 1-2, a ZigBee wireless communication module 1-3, and a processor module 1-4. Each module employs existing mature technology. Wherein,
the power management module 1-1 includes: 1-1-1 JS-7.4V-2.2AH of lithium battery, nominal capacity is 2.2 AH; the 5V voltage conversion circuit 1-1-2 with the power chip SPX1117M3-5.0 as a core provides power for the 3.3V voltage conversion circuit 1-1-3, the 1.8V voltage conversion circuit 1-1-4 and the CAN transceiving module 1-2; the 3.3V voltage conversion circuit 1-1-3 with the power chip SPX1117M3-3.3 as a core provides 3.3V voltage for the ZigBee wireless communication module 1-3 and the processor module 1-4; the 1.8V voltage conversion circuit 1-1-4 with the power chip SPX1117M3-1.8 as the core provides 1.8V voltage for the processor module 1-4.
The CAN transmission module 1-2 includes: the output of the 5V power isolation unit 1-2-1 is supplied to the CAN transceiver 1-2-3 and the high-speed optical coupler 1-2-2; the high-speed optical coupler 1-2-2 is connected with a CAN interface of the processor module 1-3 and a CAN transceiver 1-2-3 of the CAN transmission module 1-2 and used for field signal isolation; a CAN transceiver 1-2-3 for transmitting data to the CAN bus under the control of the processor module 1-3.
The ZigBee wireless communication module HZ 20121-3 is connected with a UART interface of the processor module 1-4, and the module is used for communication with the portable wireless sensor node and the portable wireless sensor node under the control of the processor module 1-4.
The core of the processor module 1-4 is the processor LPC 2109. The LPC2100 series processor of NXP company uses 32-bit ARM7 as an inner core, has the characteristics of low power consumption and high processing capability, and is rich in peripheral equipment. The CAN interface of the processor module 1-4 is connected with the CAN transmission module 1-2 and is used for controlling communication between the protocol converter and the CAN bus; and the UART interface of the processor module 1-4 is connected with the ZigBee wireless communication module 1-3 and is used for controlling the protocol converter to communicate with the ZigBee network.
Fig. 2 is a schematic block diagram of the node structure of the middle CAN bus sensor of the present invention, and the node includes a power management module 2-1, a CAN transmission module 2-2, an environmental parameter acquisition module 2-3, and a processor module 2-4. Wherein,
the power management module 2-1 includes: 2-1-1 JS-7.4V-2.2AH of lithium battery with nominal capacity of 2.2 AH; the 5V voltage conversion circuit 2-1-2 with the power chip SPX1117M3-5.0 as a core provides power for the 3.3V voltage conversion circuit 2-1-3, the 1.8V voltage conversion circuit 2-1-4 and the CAN transceiving module 2-2; the 3.3V voltage conversion circuit 2-1-3 with the power chip SPX1117M3-3.3 as a core provides 3.3V voltage for the environmental parameter acquisition module 2-3 and the processor module 2-4; the 1.8V voltage conversion circuit 2-1-4 taking the power chip SPX1117M3-1.8 as a core provides 1.8V voltage for the processor module 2-4.
The CAN transmission module 2-2 includes: the output of the 5V power isolation unit 2-2-1 is supplied to the CAN transceiver 2-2-3 and the high-speed optical coupler 2-2-2; the high-speed optical coupler 2-2-2 is connected with a CAN interface of the processor module 2-4 and a CAN transceiver 2-2-3 of the CAN transmission module 2-2 and used for field signal isolation; a CAN transceiver 2-2-3 for sending data to the CAN bus under control of the processor module 2-4.
The environment parameter acquisition module 2-3 comprises a digital air pressure sensor MS 56072-3-1 and a digital temperature and humidity sensor SHT 212-3-2. The air pressure sensor 2-3-1 is connected with the SPI interface of the processor module 2-4 and is used for collecting environmental air pressure parameters under the control of the processor module 2-4; temperature and humidity sensor 2-3-2 and processor module 2-4I2The C bus interface is connected and used for collecting environmental temperature and humidity parameters under the control of the processor module 2-4.
The core of the processor module 2-4 is a processor LPC2109, and a CAN interface of the processor module is connected with the CAN transmission module 2-2 and used for controlling communication between the node and a CAN bus; the SPI interface of the processor module 2-4 is connected with the digital air pressure sensor 2-3-1 and used for controlling the air pressure data acquisition process; i of processor Module 2-42The C bus interface is connected with the digital temperature and humidity sensor 2-3-2 and used for controlling the temperature and humidity data acquisition process.
Fig. 3 is a schematic block diagram of the structure of the portable wireless sensor node of the utility model, and the node includes a power management module 3-1, a GPS positioning module 3-2, a ZigBee wireless communication module 3-3, a parameter acquisition module 3-4, and a processor module 3-5. Wherein,
the power management module 3-1 includes: lithium battery 3-1-1 JS-7.4V-2.2AH, nominal capacity 2.2 AH; the power supply chip SPX1117M3-5.0 is taken as a core, and the 5V voltage conversion circuit 3-1-2 supplies power for the 3.3V voltage conversion circuit 3-1-3, the 1.8V voltage conversion circuit 3-1-4, the GPS module QE-GPS 913-2-2 and the physiological information acquisition instrument OEM 0013-4-3; the 3.3V voltage conversion circuit 3-1-3 with the power chip SPX1117M3-3.3 as a core provides 3.3V voltage for the digital air pressure sensor MS 56073-4-1, the digital temperature and humidity sensor SHT 213-4-2, the ZigBee wireless communication module 3-3 and the processor module 3-5; the 1.8V voltage conversion circuit 3-1-4 with the power chip SPX1117M3-1.8 as a core provides 1.8V voltage for the processor module 3-5.
The GPS positioning module 3-2 includes: the SPI/UART conversion circuit 3-2-1 is connected with an SPI interface of the processor module 3-5, converts the SPI interface into a UART interface and then is connected with the GPS module 3-2-2; the GPS positioning module 3-2-2 is used for acquiring the position information of the person under the control of the processor module 3-5.
The ZigBee wireless communication module HZ 20123-3 is connected with a UART interface of the processor module 3-5 and used for communicating with the protocol converter, the portable wireless sensor node and the portable wireless sensor node under the control of the processor module 3-5.
The parameter acquisition module 3-4 comprises a digital air pressure sensor MS 56073-4-1, a digital temperature and humidity sensor SHT 213-4-2 and a physiological information acquisition instrument OEM 0013-4-3. The air pressure sensor 3-4-1 is connected with the SPI interface of the processor module 3-5 and is used for collecting environmental air pressure parameters under the control of the processor module 3-5; temperature and humidity sensor 3-4-2 and processor module 3-5I2The C bus interface is connected and used for collecting environmental temperature and humidity parameters under the control of the processor module 3-5; the physiological information acquisition instrument 3-4-3 is connected with a UART interface of the processor module 3-5 and is used for acquiring physiological information parameters under the control of the processor module 3-5.
The core of the processor module 3-5 is a processor LPC2109, and an SPI interface of the processor module is connected with the GPS positioning module 3-2 and used for controlling the GPS module to acquire personnel position information; the other SPI interface of the processor module 3-5 is connected with the digital air pressure sensor 3-4-1 and used for controlling the air pressure data acquisition process; i of processor Module 3-52The C bus interface is connected with the digital temperature and humidity sensor 3-4-2 and used for controlling the temperature and humidity data acquisition process; the UART interface of the controller module 3-5 is connected with the physiological information acquisition instrument 3-4-3 and is used for controlling the physiological parameter acquisition process; the other UART interface of the controller module 3-5 is connected with the ZigBee wireless communication module 3-3 and is used for controlling the communication between the node and the protocol converter, the portable wireless sensor node and the portable wireless sensor node.
The utility model discloses a portable wireless sensor node structure functional block diagram as shown in fig. 4, this node includes power management module 4-1, zigBee wireless communication module 4-2, environmental parameter acquisition module 4-3, processor module 4-4. Wherein,
the power management module 4-1 includes: lithium battery 4-1-1 JS-7.4V-2.2AH, nominal capacity 2.2 AH; the 5V voltage conversion circuit 4-1-2 with the power chip SPX1117M3-5.0 as the core is a 3.3V voltage conversion circuit 4-1-3 and a 1.8V voltage conversion circuit 4-1-4; a 3.3V voltage conversion circuit 4-1-3 with a power supply chip SPX1117M3-3.3 as a core provides 3.3V voltage for a digital air pressure sensor MS 56074-3-1, a digital temperature and humidity sensor SHT 214-3-2, a ZigBee wireless communication module 4-2 and a processor module 4-4; the 1.8V voltage conversion circuit 4-1-4 with the power chip SPX1117M3-1.8 as a core provides 1.8V voltage for the processor module 4-4.
The ZigBee wireless communication module HZ 20124-2 is connected with a UART interface of the processor module 4-4 and is used for communicating with the protocol converter, the portable wireless sensor nodes and the portable wireless sensor nodes under the control of the processor module 4-4.
The environmental parameter acquisition module 4-3 comprises: a digital air pressure sensor MS 56074-3-1 and a digital temperature and humidity sensor SHT 214-3-2. The air pressure sensor 4-3-1 is connected with the SPI interface of the processor module 4-4 and is used for collecting environmental air pressure parameters under the control of the processor module 4-4; temperature and humidity sensor 4-3-2 and processor module 4-4I2The C bus interface is connected and used for collecting environmental temperature and humidity parameters under the control of the processor module 4-4.
The core of the processor module 4-4 is a processor LPC2109, and an SPI interface of the processor module is connected with the digital air pressure sensor 4-3-1 and used for controlling the air pressure data acquisition process; i of processor module 4-42The C bus interface is connected with the digital temperature and humidity sensor 4-3-2 and used for controlling the temperature and humidity data acquisition process; the UART interface of the controller module 4-4 is connected with the ZigBee wireless communication module 4-2 and is used for controlling the communication between the nodes and the ZigBee network, the CAN bus protocol converter and the portable wireless sensor nodes。
Fig. 5 is a schematic view of an overall structure according to an embodiment of the present invention. The whole monitoring system consists of wireless monitoring nodes (a portable wireless sensor node 5-6 and a portable wireless sensor node 5-3), wired monitoring nodes (a CAN bus sensor node 5-1) and a protocol converter (a ZigBee network and a CAN bus protocol converter 5-4).
The CAN bus sensor node 5-1 is directly connected with the CAN bus 5-2, collects and monitors the environmental parameters of the process field through the sensor on the node under the control of the processor on the node, analyzes and processes the environmental parameters, then sends the environmental parameters to the CAN bus 5-2, and transmits the environmental parameters to other nodes or a monitoring center through the bus. The portable wireless sensor nodes 5-6 can be carried to the process field by workers. The node can realize monitoring of environmental parameters within a large range through movement of workers on a process field, and in addition, the sensors on the node can acquire the positions, vital signs, surrounding environmental parameters and the like of the workers on the field under the control of the processor and are used for judging the positions and life activity conditions of the workers. The portable wireless sensor node 5-3 may be placed in a place where it is temporarily inconvenient to lay the CAN bus to monitor environmental parameters. The ZigBee network and CAN bus protocol converter 5-4 is used for forwarding data between the ZigBee network and the CAN bus.
The utility model discloses a working process does: the data transmission condition in the chemical safety monitoring system is as follows. The CAN bus sensor node 5-1 in the wired monitoring node CAN directly transmit the acquired environmental parameters to the CAN bus 5-2 under the control of the processor module; the portable wireless sensor nodes 5-6 and the portable wireless sensor nodes 5-3 in the wireless monitoring nodes need to transmit collected environmental parameters to the protocol converter 5-4 through the ZigBee network 5-5 formed by the nodes and the protocol converter under the control of the processor module, and finally the protocol converter 5-4 transmits the received data to the CAN bus 5-2.
Claims (1)
1. The utility model provides a chemical industry safety monitoring system based on mix field bus technique, includes zigBee network and CAN bus protocol converter, CAN bus sensor node, personal wireless sensor node and portable wireless sensor node, its characterized in that:
the ZigBee network and CAN bus protocol converter comprises a first power management module, a first ZigBee wireless communication module, a first CAN transmission module and a first processor module;
the first power management module comprises a lithium battery, a 5V voltage conversion circuit, a 3.3V voltage conversion circuit and a 1.8V voltage conversion circuit; the lithium battery JS-7.4V-2.2AH outputs 7.4V, 5V, 3.3V and 1.8V through the voltage conversion circuit, and supplies power for other modules on the protocol converter;
the first ZigBee wireless communication module is in a model of HZ2012 and is used for communication among the protocol converter, the portable wireless sensor node and the portable wireless sensor node;
the first CAN transmission module consists of a CAN transceiver TJA1040T, a high-speed optical coupler 6N137 and a power isolation unit B0505S; the output of the power isolation unit is used by the CAN transceiver and the high-speed optical coupler; the CAN transceiver is mutually connected with the high-speed optocoupler and used as a transmission channel between the node and the CAN bus;
the first processor module adopts an LPC2109 low-power-consumption processor, and a CAN interface of the first processor module is connected with a first CAN transmission module; the universal asynchronous receiving and transmitting interface is connected with the ZigBee wireless communication module, and the first processor module is used for controlling the forwarding of data between the CAN bus and the ZigBee network;
the CAN bus sensor node comprises a second power management module, a first environmental parameter acquisition module, a second CAN transmission module and a second processor module;
the second power management module comprises a lithium battery, a 5V voltage conversion circuit, a 3.3V voltage conversion circuit and a 1.8V voltage conversion circuit; the output voltage of the lithium battery JS-7.4V-2.2AH is 7.4V, 5V, 3.3V and 1.8V are output through the voltage conversion circuit, and power is supplied to other modules on the CAN bus sensor node;
the first environment parameter acquisition module consists of a digital air pressure sensor MS5607 and a digital temperature and humidity sensor SHT21 and is used for completing data acquisition of air pressure, temperature and humidity;
the second CAN transmission module consists of a CAN transceiver TJA1040T, a high-speed optical coupler 6N137 and a power isolation unit B0505S; the output of the power isolation unit is used by the CAN transceiver and the high-speed optical coupler; the CAN transceiver is connected with the high-speed optocoupler and used as a transmission channel between the node and the CAN bus;
the second processor module adopts an LPC2109 low-power-consumption processor, and a CAN interface of the second processor module is connected with a second CAN transmission module; serial peripheral interfaceThe port is connected with a digital air pressure sensor; i is2The C bus interface is connected with the digital temperature and humidity sensor; the second processor module is used for controlling the communication between the node and other nodes on the CAN bus; the control environment parameter acquisition module is used for simply analyzing and processing the acquired environment parameters;
the portable wireless sensor node comprises a third power management module, a parameter acquisition module, a second ZigBee wireless communication module, a GPS positioning module and a third processor module;
the third power management module comprises a lithium battery, a 5V voltage conversion circuit, a 3.3V voltage conversion circuit and a 1.8V voltage conversion circuit; the output voltage of the lithium battery JS-7.4V-2.2AH is 7.4V, 5V, 3.3V and 1.8V are output through the voltage conversion circuit, and power is supplied to other modules on the portable wireless sensor node;
the parameter acquisition module consists of a digital air pressure sensor MS5607, a digital temperature and humidity sensor SHT21 and a physiological information acquisition instrument OEM001 and is used for completing data acquisition of air pressure, temperature, humidity, body temperature, blood oxygen saturation and pulse;
the second ZigBee wireless communication module HZ2012 is used for the communication between the node and the ZigBee network, the CAN bus protocol converter and the portable wireless sensor;
the GPS positioning module comprises an SPI/UART conversion circuit and a GPS module QE-GPS 91; the core of the SPI/UART conversion circuit IS an SC16IS750 chip and IS used for converting an SPI interface of the third processor module into a UART interface, the UART interface of the conversion circuit IS connected with the GPS module, and the personnel position information IS acquired through the GPS module;
the third processor module adopts an LPC2109 low-power-consumption processor, and two SPI interfaces of the third processor module are respectively connected with a GPS positioning module and a digital air pressure sensor; i is2The interface C is connected with a temperature and humidity sensor; the two UART interfaces are respectively connected with the physiological information acquisition instrument and the second ZigBee wireless communication module; the third processor module is used for controlling the communication between the node ZigBee wireless communication module and the ZigBee network, the CAN bus protocol converter and the portable wireless sensor node, controlling the parameter acquisition module and the GPS positioning module, and simplifying the acquired parametersAnalysis and processing;
the portable wireless sensor node comprises a fourth power management module, a second environment parameter acquisition module, a third ZigBee wireless communication module and a fourth processor module;
the fourth power management module comprises a lithium battery, a 5V voltage conversion circuit, a 3.3V voltage conversion circuit and a 1.8V voltage conversion circuit; the output voltage of the lithium battery JS-7.4V-2.2AH is 7.4V, 5V, 3.3V and 1.8V are output through the voltage conversion circuit, and power is supplied to other modules on the portable wireless sensor node;
the second environment parameter acquisition module consists of a digital air pressure sensor MS5607 and a digital temperature and humidity sensor SHT21 and is used for completing data acquisition of air pressure, temperature and humidity;
the third ZigBee wireless communication module HZ2012 is used for the communication between the nodes and the ZigBee network, the CAN bus protocol converter and the portable wireless sensor nodes;
the fourth processor module adopts an LPC2109 low-power-consumption processor, and a CAN interface of the fourth processor module is connected with a CAN transmission module; the SPI interface is connected with the digital air pressure sensor; i is2The interface C is connected with a temperature and humidity sensor; the UART interface is connected with the fourth ZigBee wireless communication module; the processor module is used for controlling the communication between the node ZigBee wireless communication module and the ZigBee network, the CAN bus protocol converter and the portable wireless sensor node, controlling the environmental parameter acquisition module and simply analyzing and processing the acquired parameters.
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| CN201120209169XU CN202127426U (en) | 2011-06-21 | 2011-06-21 | Chemical engineering safety monitoring system based on hybrid field bus technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10055781B2 (en) | 2015-06-05 | 2018-08-21 | Boveda Inc. | Systems, methods and devices for controlling humidity in a closed environment with automatic and predictive identification, purchase and replacement of optimal humidity controller |
| US10909607B2 (en) | 2015-06-05 | 2021-02-02 | Boveda Inc. | Systems, methods and devices for controlling humidity in a closed environment with automatic and predictive identification, purchase and replacement of optimal humidity controller |
-
2011
- 2011-06-21 CN CN201120209169XU patent/CN202127426U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10055781B2 (en) | 2015-06-05 | 2018-08-21 | Boveda Inc. | Systems, methods and devices for controlling humidity in a closed environment with automatic and predictive identification, purchase and replacement of optimal humidity controller |
| US10909607B2 (en) | 2015-06-05 | 2021-02-02 | Boveda Inc. | Systems, methods and devices for controlling humidity in a closed environment with automatic and predictive identification, purchase and replacement of optimal humidity controller |
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