CN205281298U - Low -power consumption environmental monitoring system - Google Patents
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- CN205281298U CN205281298U CN201520986501.1U CN201520986501U CN205281298U CN 205281298 U CN205281298 U CN 205281298U CN 201520986501 U CN201520986501 U CN 201520986501U CN 205281298 U CN205281298 U CN 205281298U
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Abstract
Technical scheme mainly forms by large capacity lithium cell and PCB, the unit to the external tapping mainly for power supply, analog output, warning output and modbus communication interface, the PCB design is relatively independent, can be parallel with the lithium cell, also can exist alone, utilize 9~36V to supply power. For the commonality that improves the module, functional unit takes the modularized design, and PCB adopts the mother board to add the expansion board mode, can with the connector that corresponding functional module inserted on the mother board according to the user demand. Technical scheme's beneficial effect lies in: the utility model discloses utilize the embedded technology integrated on a circuit board with numerous key elements monitorings, provide one kind can cut out, the environmental monitoring solution of low -power consumption, all -weather, sexual valence relative altitude. In addition, externally adopt the alternately output of 4~20mA, the isolated form light relay of this system can meet medium and small power load, standard modbus RTU and the communication of modbus TCP, can conveniently carry out integration with systems such as industry PLC, DCS, have good application promotion and worth.
Description
Technical Field
The utility model relates to a control field especially relates to a low-power consumption environmental monitoring system.
Background
The special equipment monitors or records various parameters of the casting process, the using environment and the like so as to ensure the product quality and facilitate maintenance, and the information needing to be monitored or recorded comprises the environmental conditions of the casting equipment and a factory building, the transportation condition, the using condition, the environmental condition and the like. The basic measurement elements of the environment monitoring module comprise: temperature, humidity, dew point; other monitoring elements include: dust, noise, vibration (acceleration) in the X/Y/Z three-axis direction, magnetic field intensity, electric quantity of a lithium battery and the like.
The monitoring system in the prior art has great defects, and mainly reflects that each monitoring system is not unified and centralized to monitor and use, most of the monitoring systems are single independent systems, and the monitoring system is high in energy consumption and use cost.
Disclosure of Invention
The utility model discloses to prior art's not enough, provide a low-power consumption environmental monitoring system, this system has low power dissipation, centralized monitoring degree height, can carry out the modularization control, and its implementation cost and administrative cost are lower in addition.
For solving the prior art problem, the utility model discloses a technical scheme be:
a low-power consumption environment monitoring system comprises a power supply conversion module, a central monitoring processing unit, an environment sensing acquisition unit and an information interaction module; wherein,
the power supply conversion module is mainly used for charging and discharging the lithium battery and providing a stable power supply for the environment monitoring system; the power supply conversion module is used for performing voltage matching between an external power supply and an environment monitoring system power supply by using an optocoupler TLP521-1, then inputting the state of the external power supply to an IO pin of an MCU (microprogrammed control Unit) and judging the voltage, a three-terminal voltage-stabilizing integrated circuit LM7805 provides a safe charging voltage of DC5V for a lithium battery, and a rear-stage power supply conversion chip TPS63001DRC and TPS63002DRC provide stable DC3.3V and DC5V power supplies for the environment monitoring system in an effective charging and discharging voltage range of the lithium battery in a BUCK-BOOST mode;
the central monitoring processing unit is mainly responsible for data acquisition, storage and processing, the central monitoring processing unit takes ARMCortex-M0 as a core processor, is powered by a 3.3V single power supply, is internally provided with 20KBSRAM, 4KBEEPROM, 5 UARTs, 2I 2C, 2 SSPs, 4 timers, 12 channels AI (12 bits) and 80 GPIO peripherals, and is designed to have a normal working mode of 12MHz and consume 3mA of current;
The environment sensing acquisition unit is connected with a GPIO (general purpose input/output) of the central monitoring processing unit and is mainly responsible for acquiring various environment data needing to be monitored;
the information interaction module mainly completes human-computer information interaction and mainly comprises an LCD (liquid crystal display) screen display module, Modbus _ RTU/TCP communication, digital quantity alarm output and analog quantity 4-20 mA output; wherein,
the LCD display module has the working voltage of 3.3V-5.5V, is communicated with the serial SPI, and is divided into 4 lines to display 8 environmental parameters in real time;
the Modbus _ RTU/TCP communication is characterized in that a half-duplex transceiver SP3485 and an embedded Ethernet serial port conversion module IPORT-1 provide RS485 and Ethernet underlying communication and a CRC16 checking mode of high-low byte exchange respectively, so that high reliability of communication is ensured;
under the condition that the digital quantity alarm output is supplied with power by an external power supply, an alarm load output of 2.5A is provided by using a light relay TLP3554 according to a set threshold value of an environment monitoring parameter;
under the condition that an external power supply supplies power, the analog quantity 4-20 mA data output adopts an integrated circuit LTC2620CGN to provide 8 paths of voltage output of 0-5V in an SPI communication mode, and the voltage signal of 0-5V is converted into a 4-20 mA current signal through a signal conditioning chip ZCM435BS corresponding to temperature, humidity, dew point, noise, dust concentration and X/Y/Z triaxial vibration acceleration data respectively.
The method for realizing low-power consumption environment monitoring by using the low-power consumption environment monitoring system comprises the following steps:
the method comprises the following steps: after a core processor of the central monitoring processing unit is powered on and reset, the central monitoring processing unit is initialized, specifically, internal 12MHz crystal oscillator clock configuration is carried out, and after the time delay is stable, chip pin function distribution, GPIO input and output characteristics, IO rising edge interruption and SPI and I2C communication built-in peripheral functions are configured;
step two: a core processor of the central monitoring processing unit reads parameter configuration data stored in a built-in EEPROM, and determines whether a corresponding parameter is read and whether a corresponding interrupt enable is started according to a functional module daughter board inserted into a GPIO port;
step three: after the central monitoring processing unit is initialized, when an external power supply supplies power to the central processing unit, the central monitoring processing unit enters a circulation mode, otherwise, the central monitoring processing unit enters a sleep mode and waits for interruption and awakening;
when the central monitoring processing unit is in a circulation mode, the central monitoring processing unit detects whether the RTC real-time clock module is on line or not, and reads real-time clock data if the RTC real-time clock module is on line; detecting whether each sensing module is on-line or not, and reading corresponding data when the sensing module is on-line; detecting whether an analog output module is on-line or not, outputting 8 paths of output of temperature, humidity, dew point, noise, dust and acceleration values in the X/Y/Z three-axis direction if the analog output module is on-line, judging whether the analog output module is on-line or not according to a parameter configuration alarm threshold value to determine whether the alarm output is enabled or not, then detecting whether a storage module is on-line or not, and storing the acquired data into FLASH if the analog output module is on-line; when the environmental parameters are in the normal value range, detecting whether the LCD module is on-line, updating data when the LCD module is on-line, and entering the next round of circulation when the LCD module is not on-line;
When the central monitoring processing unit is in a sleep mode, the central monitoring processing unit waits for interruption and awakening; the interruption comprises RTC real-time clock timing interruption, any axial out-of-limit interruption in X/Y/Z triaxial acceleration vibration and Modbus communication interruption;
further, the RTC real-time clock timing interruption is to wake up a core processor or interrupt a cycle process by using IO interruption according to RTC timing interruption intervals in parameter configuration;
and any axial out-of-limit interruption in the X/Y/Z triaxial acceleration vibration is to wake up a core processor or interrupt a cycle process by using IO interruption according to an alarm threshold in parameter configuration, then to read vibration and magnetic field data, to determine whether to store acquired data or directly quit the interruption according to the online condition of a storage module, if frequently triggered in unit time, to set the data to be in a transportation state, to record again after timing for 5 minutes, and to directly quit the interruption.
The Modbus communication interruption: the method comprises the following steps that when the power is powered on for the first time, 9600bps is defaulted, no check is carried out, 8-bit data bits are provided, a communication address is 1, a user can carry out configuration according to specific requirements, configured data are stored in an EEPROM built in a core processor, and the configuration is effective after the power is cut off and restarted or a manual reset key is pressed; and analyzing the data length according to the data writing or reading command, judging after receiving CRC check, and feeding back and outputting if the check is correct.
Further, the information sensor includes temperature, humidity, noise, dust, RTC, magnetic field sensor, and the like.
Technical scheme's beneficial effect lies in: the utility model discloses utilize embedded technique with numerous key elements monitoring integration on a circuit board, provide one kind can tailor, low-power consumption, all-weather, the environmental monitoring solution of price/performance ratio height. In addition, the system adopts 4-20 mA output for external interaction, the isolated type optical relay can be connected with a medium and small power load, the standard ModbusRTU is communicated with ModbusTCP, seamless integration can be conveniently carried out on the system with an industrial PLC, a DCS and the like, and the system has good application and popularization values.
Drawings
Fig. 1 is a schematic view of the overall structure of a low power consumption environmental monitoring system according to the present invention;
fig. 2 is a schematic monitoring view of a low power consumption environmental monitoring system according to the present invention;
fig. 3 is the utility model relates to a low-power consumption environmental monitoring system control interrupt schematic diagram.
Detailed Description
For more detailed description of the technical solutions of the present invention, the technical solutions of the present invention are further described by the following embodiments.
Technical scheme mainly constitute by large capacity lithium cell and PCB, the unit is mainly for power supply, analog output, alarm output and Modbus communication interface to the external interface, the PCB design is relatively independent, can juxtapose with the lithium cell, also can exist alone, utilizes 9 ~ 36V power supply. In order to improve the universality of the module, the functional units are in a modularized design, the PCB adopts a motherboard and expansion board mode, and the corresponding functional modules are inserted into connectors on the motherboard according to the use requirements.
In the design, the power supply of the module is mainly subjected to filtering, overcurrent and overvoltage protection, and the PCB can be subjected to undisturbed switching between external power supply and battery power supply, so that key functional devices of the PCB are protected. By the working principle of the power converter BUCK-BOOST, the working life of the lithium battery is prolonged to the maximum extent on the premise of ensuring the stability of the power supply voltage of the circuit. In the selection of functional components and structural members, the industrial model with wide temperature and wide pressure is selected as far as possible, the heat dissipation and anti-seismic factors are fully considered in structural design, and the adaptability to severe environment and long-distance transportation is improved. Meanwhile, according to engineering experience and cost performance comparison of all three-prevention measures, three-prevention paint is adopted for coating, and the butt joint plug-in part is encapsulated by silica gel, so that the three-prevention design of moisture resistance, salt mist resistance and mold resistance is realized.
The utility model relates to a low-power consumption environmental monitoring system, which comprises a power supply conversion module, a central monitoring and processing unit, an environmental sensing and collecting unit and an information interaction module; wherein,
(1) for power supply conversion module
The power conversion takes the charge and discharge of the lithium battery and the stable required power supply provided for the system as the design key points, and simultaneously satisfies the independence of the lithium battery, namely whether the lithium battery is provided or not, the system can run stably so as to satisfy different application occasions.
Except that the light emitting diode indicates whether the external power supply is available or not, the optocoupler TLP521-1 is used for voltage matching between the external power supply and a system power supply, and the state of the external power supply is input to an IO pin of the MCU for judgment.
The three-terminal voltage-stabilizing integrated circuit LM7805 provides safe charging voltage of DC5V for the lithium battery. The TPS63001DRC and the TPS63002DRC of the rear-stage power supply conversion chip adopt a BUCK-BOOST principle, and provide stable power supply sources of DC3.3V and DC5V for the system in the effective charging and discharging voltage range of the lithium battery.
(2) For central monitoring processing unit
The central monitoring processing unit takes ARMCortex-M0(LPC11E67JBD100) as a core processor, 3.3V single power supply (1.8V-3.6V) is provided with 20KBSRAM, 4KBEEPROM, 5 UARTs, 2I 2C, 2 SSPs, 4 timers, 12-channel AI (12bit), 80 GPIOs and other peripherals, and when the central monitoring processing unit works in a normal working mode of 12MHz, the central monitoring processing unit consumes 3mA (the common sleep mode is only 2mA) and meets the requirements of function design and low power consumption.
The various sensor module parameters used are shown in table 1. Dew point temperature in the table means that the air can hold the most moisture at this temperature, and when the temperature cools to the dew point, the air becomes saturated and fog, dew or frost appears. Dew point is calculated according to temperature and humidity to obtain [5 ]:
LogEW=(0.66077＋7.5*T/(237.3＋T)＋(log10(RH)－2)-------------------(1)
Dp=((0.66077-logEW)*237.3)/(logEW－8.16077)------------------------(2)
In the formula (1) and the formula (2), T is the test temperature, RH is the test humidity, and Dp is the dew point calculation result.
Data storage according to monitoring requirements, when the timing interval is interrupted and vibration is out of limit, collected environment data is stored into a 128Mb FLASH (MMX25L12845EZNI-10G) in an SPI communication mode. The RTC real-time clock SD3088AS has a lithium battery power detection function, wherein the interrupt output frequency range is 4096 Hz-1/16 Hz, and the corresponding data acquisition frequency can be flexibly set according to different application occasions.
(3) For environment sensing acquisition unit
The environment sensing acquisition unit is connected with the GPIO of the central monitoring processing unit and is mainly responsible for acquiring various environment data needing to be monitored.
(4) For information interaction module
The external information interaction mainly comprises the following 4 modes: the system comprises an LCD (liquid crystal display) screen display, Modbus _ RTU/TCP communication, digital quantity alarm output and analog quantity 4-20 mA output.
The LCD liquid crystal screen displays: the working voltage of the liquid crystal module is 3.3V-5.5V, and 8 environmental parameters are displayed in real time in two sections of 4 lines in a serial SPI communication mode. The power supply condition of the external power supply determines whether the backlight function is started or not.
Modbus _ RTU/TCP communication: the half-duplex transceiver SP3485 and the embedded Ethernet-to-serial port module IPORT-1 provide a CRC16 check mode of RS485 and Ethernet underlying communication and high-low byte exchange respectively, and high reliability of communication is guaranteed.
And (3) digital quantity alarm output: in the case of power supply from an external power source, an alarm load output of up to 2.5A is provided using the light relay TLP3554 according to a set threshold of the environmental monitoring parameter.
And (3) outputting analog quantity 4-20 mA data: under the condition of external power supply, an SPI communication mode is adopted, LTC2620CGN # PBF is adopted to provide 8 paths of voltage output of 0-5V, the voltage output corresponds to temperature, humidity, dew point, noise, dust concentration and X/Y/Z triaxial vibration acceleration data respectively, and 0-5V voltage signals are converted into 4-20 mA current signals through a signal conditioning chip ZCM435 BS.
As shown in FIG. 2, the method for realizing environmental monitoring by the low-power environmental monitoring system of the present invention is:
the method comprises the following steps: after a core processor of the central monitoring processing unit is powered on and reset, the central monitoring processing unit is initialized, specifically, internal 12MHz crystal oscillator clock configuration is carried out, and after the time delay is stable, chip pin function distribution, GPIO input and output characteristics, IO rising edge interruption and SPI and I2C communication built-in peripheral functions are configured;
step two: a core processor of the central monitoring processing unit reads parameter configuration data stored in a built-in EEPROM, and determines whether a corresponding parameter is read and whether a corresponding interrupt enable is started according to a functional module daughter board inserted into a GPIO port;
Step three: after the central monitoring processing unit is initialized, when an external power supply supplies power to the central processing unit, the central monitoring processing unit enters a circulation mode, otherwise, the central monitoring processing unit enters a sleep mode and waits for interruption and awakening;
when the central monitoring processing unit is in a circulation mode, the central monitoring processing unit detects whether the RTC real-time clock module is on line or not, and reads real-time clock data if the RTC real-time clock module is on line; detecting whether each sensing module is on-line or not, and reading corresponding data when the sensing module is on-line; detecting whether an analog output module is on-line or not, outputting 8 paths of output of temperature, humidity, dew point, noise, dust and acceleration values in the X/Y/Z three-axis direction if the analog output module is on-line, judging whether the analog output module is on-line or not according to a parameter configuration alarm threshold value to determine whether the alarm output is enabled or not, then detecting whether a storage module is on-line or not, and storing the acquired data into FLASH if the analog output module is on-line; when the environmental parameters are in the normal value range, detecting whether the LCD module is on-line, updating data when the LCD module is on-line, and entering the next round of circulation when the LCD module is not on-line;
as shown in fig. 3, when the central monitoring processing unit is in the sleep mode, the central monitoring processing unit waits for an interrupt to wake up; the interruption comprises RTC real-time clock timing interruption, any axial out-of-limit interruption in X/Y/Z triaxial acceleration vibration and Modbus communication interruption; wherein,
The RTC real-time clock timing interruption is to wake up a core processor or interrupt a cycle process by using IO interruption according to RTC timing interruption intervals in parameter configuration;
and any axial out-of-limit interruption in the X/Y/Z triaxial acceleration vibration is to wake up a core processor or interrupt a cycle process by using IO interruption according to an alarm threshold in parameter configuration, then to read vibration and magnetic field data, to determine whether to store acquired data or directly quit the interruption according to the online condition of a storage module, if frequently triggered in unit time, to set the data to be in a transportation state, to record again after timing for 5 minutes, and to directly quit the interruption.
The Modbus communication interruption: the method comprises the following steps that when the power is powered on for the first time, 9600bps is defaulted, no check is carried out, 8-bit data bits are provided, a communication address is 1, a user can carry out configuration according to specific requirements, configured data are stored in an EEPROM built in a core processor, and the configuration is effective after the power is cut off and restarted or a manual reset key is pressed; and analyzing the data length according to the data writing or reading command, judging after receiving CRC check, and feeding back and outputting if the check is correct.
The utility model discloses mainly utilize embedded technique with numerous key element monitoring integration on a circuit board, adopt the mother board to add the function plug-in components mode, provide one kind can tailor, low-power consumption, all-weather, the environmental monitoring solution that the price/performance ratio is high, possess real time monitoring and trace back the function with key historical data. In addition, 4-20 mA output is adopted for interaction, the standard ModbusRTU can be connected with a medium-low power load, and the ModbusTCP is communicated with the ModbusRTU, so that seamless integration can be conveniently carried out on systems such as an industrial PLC and a DCS, and the application and popularization values are good.
The above description of the embodiments is only for the purpose of helping to understand the method of the present application and its core ideas; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (2)
1. A low-power consumption environmental monitoring system which characterized in that: the low-power consumption environment monitoring system comprises a power supply conversion module, a central monitoring processing unit, an environment sensing acquisition unit and an information interaction module; wherein,
the power supply conversion module is mainly used for charging and discharging the lithium battery and providing a stable power supply for the environment monitoring system; the power supply conversion module is used for performing voltage matching between an external power supply and an environment monitoring system power supply by using an optocoupler TLP521-1, then inputting the state of the external power supply to an IO pin of an MCU (microprogrammed control Unit) and judging the voltage, a three-terminal voltage-stabilizing integrated circuit LM7805 provides a safe charging voltage of DC5V for a lithium battery, and a rear-stage power supply conversion chip TPS63001DRC and TPS63002DRC provide stable DC3.3V and DC5V power supplies for the environment monitoring system in an effective charging and discharging voltage range of the lithium battery in a BUCK-BOOST mode;
the central monitoring processing unit is mainly responsible for data acquisition, storage and processing, the central monitoring processing unit takes ARMCortex-M0 as a core processor, is powered by a 3.3V single power supply, is internally provided with 20KBSRAM, 4KBEEPROM, 5 UARTs, 2I 2C, 2 SSPs, 4 timers, 12 channels AI (12 bits) and 80 GPIO peripherals, and is designed to have a normal working mode of 12MHz and consume 3mA of current;
The environment sensing acquisition unit is connected with a GPIO (general purpose input/output) of the central monitoring processing unit and is mainly responsible for acquiring various environment data needing to be monitored;
the information interaction module mainly completes human-computer information interaction and mainly comprises an LCD (liquid crystal display) screen display module, Modbus _ RTU/TCP communication, digital quantity alarm output and analog quantity 4-20 mA output; wherein,
the LCD display module has the working voltage of 3.3V-5.5V, is communicated with the serial SPI, and is divided into 4 lines to display 8 environmental parameters in real time;
the Modbus _ RTU/TCP communication is characterized in that a half-duplex transceiver SP3485 and an embedded Ethernet serial port conversion module IPORT-1 provide RS485 and Ethernet underlying communication and a CRC16 checking mode of high-low byte exchange respectively, so that high reliability of communication is ensured;
under the condition that the digital quantity alarm output is supplied with power by an external power supply, an alarm load output of 2.5A is provided by using a light relay TLP3554 according to a set threshold value of an environment monitoring parameter;
under the condition that an external power supply supplies power, the analog quantity 4-20 mA data output adopts an integrated circuit LTC2620CGN to provide 8 paths of voltage output of 0-5V in an SPI communication mode, and the voltage signal of 0-5V is converted into a 4-20 mA current signal through a signal conditioning chip ZCM435BS corresponding to temperature, humidity, dew point, noise, dust concentration and X/Y/Z triaxial vibration acceleration data respectively.
2. A low power consumption environmental monitoring system according to claim 1, wherein: the environment sensor comprises a temperature sensor, a humidity sensor, a noise sensor, a dust sensor, an RTC sensor and a magnetic field sensor.
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| CN106094945A (en) * | 2016-07-01 | 2016-11-09 | 北京蘑宿科技有限责任公司 | A kind of cultivating edible monitoring system and method thereof |
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| CN106094945B (en) * | 2016-07-01 | 2018-02-09 | 北京蘑宿科技有限责任公司 | A kind of cultivating edible monitoring system and its method |
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Effective date of registration: 20190311 Address after: 750021 550 Beijing West Road, Xixia District, Yinchuan, the Ningxia Hui Autonomous Region Patentee after: KOCEL MACHINERY Ltd. Address before: 750021 550 Beijing West Road, Xixia District, Yinchuan, the Ningxia Hui Autonomous Region Patentee before: NINGXIA KOCEL GROUP Co.,Ltd. |
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