CN212569936U - Data acquisition control instrument and system based on Internet of things - Google Patents

Abstract

The utility model relates to a data acquisition control appearance and system reaches based on thing networking belongs to automatic instrument technical field. Data acquisition control appearance based on thing networking includes: the main control circuit board is used for completing system power conversion/distribution, system work control, field instrument data acquisition and processing, field device control and wireless communication control of the man-machine interface module, is electrically connected with the main control circuit board, is provided with keys and a display screen, and is used for man-machine interaction between an operator and the system; and the wireless communication module is electrically connected with the master control circuit board, is in communication connection with the service management platform and is used for uploading field data and receiving cloud instructions. The data acquisition control instrument not only can realize the data acquisition/uploading function, but also can be compatible with the functions of charging, recharging, price adjustment, valve control and the like of the valve control of the Internet of things, and can be conveniently applied to data acquisition, the Internet of things transformation of a mechanical metering system and the like by matching with the intrinsically safe design of the system.

Description

Data acquisition control instrument and system based on Internet of things

Technical Field

The utility model relates to an automatic change instrument technical field, specifically speaking relates to a data acquisition control appearance and system based on thing networking.

Background

At present, as people pay more and more attention to the environment, the environmental problem becomes a very important problem currently faced by the government, and an important means for improving the environment is to change the structural proportion of primary energy consumption in China. Natural gas is regarded as a recognized low-carbon clean energy, is more and more emphasized by the nation, and will be rapidly developed in the future. Moreover, natural gas is a high-quality, high-efficiency and clean energy source and an important chemical raw material, is generally regarded and preferentially utilized in various countries of the world, and accounts for 35% of the energy structure.

With the rapid development of the natural gas industry and the rapid promotion of informatization and intellectualization of the gas industry, users who newly add and transform natural gas are greatly increased every year. For newly added users, natural gas operators are gradually advancing by advancing the purchase of internet of things meters; however, for the mechanical stock metering system with a huge market base number, in consideration of replacement cost, reasonable normal meter and the like, a natural gas operator hopes to meet the internet-of-things promotion requirement of the metering system, effectively control cost and give consideration to enterprise benefits by means of internet-of-things transformation of the stock meter in the market.

However, products such as the existing data collector applied to natural gas environment monitoring and data acquisition/uploading do not have the functions of charging, recharging, price adjustment, valve control and the like, and cannot be well applied to the internet of things transformation of the traditional mechanical metering instrument.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a data acquisition control appearance and system based on thing networking not only can realize data acquisition/upload the function, can also compatible thing networking valve accuse institute have charge, supplement with money, adjust price and function such as valve accuse.

In order to achieve the above object, in a first aspect, the utility model provides a data acquisition control appearance based on thing networking includes:

the main control circuit board is used for completing system power conversion/distribution, system work control, field instrument data acquisition and processing, field device control and wireless communication control;

the human-computer interface module is electrically connected with the main control circuit board, is provided with a key and a display screen and is used for human-computer interaction between an operator and the system;

and the wireless communication module is electrically connected with the master control circuit board, is in communication connection with the service management platform, and is used for uploading field data and receiving cloud instructions.

In the technical scheme, the data acquisition controller based on the Internet of things can realize the data acquisition/uploading function, is compatible with the functions of charging, recharging, price adjusting, valve control and the like of the valve control of the Internet of things, is matched with the intrinsically safe design of the system, and can be conveniently applied to data acquisition, the Internet of things transformation of a mechanical metering system and the like.

Optionally, in an embodiment, the main control circuit board includes a power conversion/distribution module, a signal processor, and a data storage module, a switching value receiving module, an RS485 communication module, and a valve closing control module electrically connected to the signal processor; the switching value receiving module is used for receiving the charging pulse and the alarm signal of the metering device; the RS485 communication module is a communication interface of the metering instrument and the data acquisition control instrument; and the valve closing control module triggers the IC controller to execute valve closing operation by outputting a control signal.

The power conversion/distribution module comprises a two-stage power conversion circuit, an external power supply access detection circuit and a battery power supply switch circuit; in the two-stage conversion circuit, a first stage uses a DC/DC type switching power supply chip TPS57040Q for converting high voltage input by an external power supply to +7V for use by a later stage, and simultaneously, the output state of the chip executes external power access detection through an NMOS tube (BSS138P) circuit to generate a state indicating signal for judging whether the external power supply is normally accessed; the second stage uses a DC/DC type switch power supply chip (TP262170, TPS62130R) or a LDO type linear voltage regulation chip (TPS76901DBV) to directly provide power supply output (comprising +3.3V, +3.8V and +5V) for a rear stage IC chip; the battery power supply switch circuit forms a bidirectional switch control circuit using a dual PMOS (DMG2031L) to bidirectionally disconnect the battery power supply path when there is compliant external power connection.

The signal processor uses a general low-power ARM processor (STM32F103VET6), and the data storage module uses EEPROM (M95M02), FROM (FM25H20), FLASH (W25Q32FV, W25Q128FV) or other nonvolatile memories; the switching value receiving module uses a double diode (BAT750) blocking circuit for receiving an external OC or OD signal input and preventing an external level input to protect an internal circuit; the RS485 communication module realizes the communication function of an RS485 bus by using a general RS485 transceiver (SN65HVD75 DR); the valve closing control module is composed of NMOS and PMOS tubes (BSS138P, PMV250) and necessary resistance-capacitance devices, so that the signal output with high level normally and effective low level or low level normally and effective high level is realized, and the output high level can be set by an internal or external interface power supply.

Optionally, in an embodiment, the power conversion/distribution module is powered by a built-in battery pack or an external dc power supply, and when a compliant external power supply is identified, the external power supply is automatically selected to supply power to the system, and the built-in battery enters a backup state; meanwhile, the power supply conversion/distribution module provides a state indication signal of external power access to the signal processor, and the signal processor judges the power supply state of the system according to the state signal and adjusts the working state of the system.

Optionally, in an embodiment, the main control circuit board further includes a real-time clock module, an upper computer communication module, a battery detection module, a system monitoring module, a power supply output module, and an environmental data acquisition module, which are electrically connected to the signal processor.

The real-time clock module mainly comprises a real-time clock chip (RX-8025T) and an auxiliary backup battery (button battery CR2032) circuit; the upper computer communication module mainly comprises an RS485 communication interface and is realized through an RS485 transceiver (SN65HVD75 DR); the battery detection module consists of MOS (metal oxide semiconductor) transistors (BSS138P and PMV250) and auxiliary resistance-capacitance devices, and the partial circuits can be controlled to be switched on or switched off and reduce the battery voltage to a voltage range suitable for the detection circuit according to a fixed proportion; the system monitoring module mainly comprises a monitoring chip (SP706REN), and is used for monitoring the stability of a +3.3V power supply and the voltage of a battery in real time; the power supply output module uses a boost chip (LM3488MM/NOPB) and MOS (PMV250, BSS138) and the like to realize controllable boost output of different voltages; the environmental data acquisition module mainly comprises a linear voltage stabilizing chip (TPS76901DBV), a channel switch chip (NX3L1G3157G) and MOS (BSS138P, PMV250) circuits, the existing voltage stabilizing chip is used for supplying power to the sensors, and the channel switch chip is used for realizing communication operation of different sensors.

Optionally, in an embodiment, the system monitoring module includes a power supply monitoring circuit and a hardware watchdog circuit, and monitors the stability of the system power supply and the working state of the system software in real time; the environment data acquisition module comprises a temperature sensor, a pressure sensor and a humidity sensor which are used for acquiring environment data.

In a second aspect, the data acquisition control system based on the internet of things provided by the utility model comprises a metering instrument and a flow controller, wherein the data acquisition control instrument is arranged between the metering instrument and the flow controller; the metering instrument is arranged on the pipeline; the flow controller is an IC controller and is used for executing valve closing operation; the data acquisition control instrument is in communication connection with the service management platform in a wireless communication mode to execute remote tasks.

The data acquisition control system integrates the functions of acquiring and processing field data, controlling field terminal equipment and performing bidirectional wireless interaction between the system and the cloud management platform, and works in a matched manner through the master control circuit board, the service management platform, the metering instrument and the IC controller.

Compared with the prior art, the utility model discloses an useful part lies in:

the utility model discloses a data acquisition control appearance on the basis that possesses traditional data collection station function, can also compatible thing networking valve accuse have charge, supplement with money, adjust price and valve accuse function such as, the design of the safe type of essence of cooperation system, can be convenient be applied to in data acquisition and the application such as mechanical type measurement system thing networking transformation.

Drawings

Fig. 1 is a schematic diagram of an external connection relationship of a data acquisition control system based on the internet of things in the embodiment of the present invention;

fig. 2 is a schematic diagram of the internal components of the data acquisition controller based on the internet of things in the embodiment of the present invention;

fig. 3 is the embodiment of the utility model provides an in the embodiment based on data acquisition control system's of thing networking work flow chart.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described below with reference to the following embodiments and accompanying drawings. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the described embodiments without any inventive step, are within the scope of the present invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of the terms "comprising" or "including" and similar referents in the context of describing the invention as being "comprising" and the like, is to be construed to cover the listed referents or items, including but not limited to the listed referents or items, and equivalents thereof. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Examples

Referring to fig. 1, the data acquisition control system based on the internet of things in the present embodiment includes a mechanical metering device, a flow controller, and a data acquisition control device disposed between the mechanical metering device and the flow controller, where the flow controller in the present embodiment is an IC card controller, the metering device is installed on a pipeline, and the IC card controller is used to perform a valve closing operation.

Referring to fig. 2, the data acquisition controller includes: a main control 1100, a man-machine module 1200 and a wireless communication module 1300. The master control 1100 is the core of the system and mainly completes the functions of system power conversion/distribution, system work control, field instrument data acquisition and processing, field device control, wireless communication control and the like; the human-computer module 1200 is a human-computer interface facing to a field operator, and realizes human-computer interaction between the operator and the system through related keys and a liquid crystal display screen; the wireless communication module 1300 is an interactive interface between the system and the cloud service management platform, and can implement functions such as uploading field data and receiving cloud instructions.

The main control 1100 is composed of a power conversion/distribution module 1101, a signal processor 1102, a data storage module 1103, a real-time clock module 1104, an upper computer communication module 1105, a battery detection module 1106, a system monitoring module 1107, an on-off receiving module 1108, an RS485 communication module 1109, a power supply output module 1110, an off-valve control module 1111 and an environmental data acquisition module 1112.

The power conversion/distribution module 1101 supports built-in battery power supply input and wide-range external direct current power supply input, and can automatically recognize the external direct current power supply access condition; when a compliant external power supply is accessed, the module automatically selects to use the external power supply to supply power to the system, the built-in battery enters a backup state, otherwise, the system uses the built-in battery to supply power to the system. The power conversion/distribution module 1101 may further send a power supply status indication signal to the signal processor 1102 in real time according to the current power supply status, and the signal processor 1102 controls the system to enter different operating modes according to the power supply status indication signal. The different working modes mainly comprise a normal working mode and a low-power consumption working mode; when the external power supply is effective, the system automatically enters a normal working mode, and all functions of the system can be in a working state according to the setting of a user; in the battery power supply state, the system automatically enters a low power consumption working mode, and the system automatically enters a dormant state after necessary operations are executed according to the configuration of a user so as to reduce power consumption.

The signal processor 1102 adopts a low-power ARM processor, and is a core unit for realizing system control; when the system is operating, the signal processor 1102 mainly completes data operation, system mode control, control management of peripheral modules, and the like.

The data storage module 1103 adopts a large-capacity nonvolatile memory, and is used for storing information such as system configuration data of the data acquisition controller, field instrument data acquired by the data acquisition controller, and system working log records.

The real-time clock module 1104 is used for providing an accurate time reference for the system; the system provides a separate backup power supply battery for the real-time clock module 1104, and ensures that the system time reference is accurate and reliable even under the condition of unexpected power failure of the system.

The upper computer communication module 1105 is a communication interface between the upper computer software and the data acquisition controller, and through the interface, the upper computer software can implement operations such as diagnosis of system state, configuration of working state, reading of log record, and the like.

The battery detection module 1106 is used for detecting the voltage of the built-in battery, so as to measure and calculate the current electric quantity information of the battery, and the signal processor 1102 timely sends out a system low-power alarm according to the measured and calculated electric quantity information, so that the system is prevented from being failed due to accidental power failure under the condition of no early warning;

the system monitoring module 1107 mainly comprises a power supply monitoring circuit and a hardware watchdog circuit, and the system monitoring module 1107 works in cooperation with the signal processor 1102 to monitor the stability of the system power supply and the working state of the system software in real time, and automatically force the system to exit an abnormal state when the system power supply is unstable or the system software enters an unknown non-set state.

The switching value receiving module 1108 includes a charging pulse input port and a three-way alarm input port, and is configured to receive a charging pulse signal and an alarm signal of the field metering device.

The RS485 communication module 1109 is a communication interface between the data acquisition controller and the field instrument, and the data acquisition controller actively reads information such as data and state of the field instrument by using an adapted communication protocol under the control of the signal processor 1102.

The power supply output module 1110 is used for providing a compliant power supply for the field instrument, and the auxiliary RS485 communication module 1109 is used for finishing RS485 communication and other work between the data acquisition control instrument and the field instrument; the power supply output module 1110 can provide three outputs at most, wherein the maximum output voltage of the two outputs is +13.65V, the working output can be selected to be +5V, +9V or +12V, the maximum output voltage of the third output is +7.14V, and the working output is + 5V.

The valve closing control module 1111 may trigger the actuator of the field control valve to act by outputting a specific control signal to implement the valve closing operation; the output control signals are three paths, wherein one path is used for simulating the low power of a battery of the on-site instrument to trigger the control valve to close the valve, the other path can output a low level signal with a high normal state, the other path can output a high level signal with a low normal state, and the high level of the two paths of signals is defaulted to be +3.3V or configured by an external circuit.

The environmental data collection module 1112 is a communication interface of the system and the field sensor, and is used for monitoring environmental data such as temperature, pressure, humidity and the like in the field; the module provides two types of four sensor interfaces, such as a sensor 1 and a sensor 2 which are connected in the figure 1, supports protocols such as a UART serial port, an RS485 interface, an I2C and the like, and is compatible with a +3.3V sensor and a +5V sensor.

The human-computer interface module 1200 comprises three keys and a liquid crystal display screen, and is a human-computer interface facing to field operators so as to realize human-computer interaction between the operators and the system; a user can switch the display content of the liquid crystal screen or control the equipment to execute specific operation through keys, and the liquid crystal is used for displaying related data, system state and other information.

The wireless communication module 1300 is an interactive interface between the system and the cloud service management platform, supports various wireless systems such as GPRS, 4G, NB-IoT, and the like, and can implement functions such as uploading field data, reporting alarm data, receiving cloud instructions, and the like.

The circuit of the data acquisition control instrument is designed by adopting an intrinsically safe circuit, the data acquisition control instrument meets the design requirement of intrinsically safe equipment, and the intrinsically safe system can be directly formed with a field instrument by the adaptive design of intrinsic safety parameters of each port under the condition of meeting the requirement of the intrinsically safe system.

Referring to fig. 3, the data acquisition control system based on the internet of things not only has the traditional data acquisition/uploading function, but also can be compatible with the functions of charging, recharging, price adjustment, valve control and the like of the valve control of the internet of things. On the premise of not damaging the explosion-proof standard requirement of a gas system, the data acquisition controller can be directly erected between a metering instrument (typically a flowmeter or a volume corrector) and a controller (typically an IC card controller), and the data acquisition controller takes the original controller as a valve execution mechanism and forms an Internet of things controller together with the original controller so as to complete the Internet of things transformation of the stock mechanical metering system. The specific working process is as follows:

(1) the system is started, and the power conversion/distribution module 1101 of the main control 1100 is started first to realize power conversion and provide required power for each module of the system.

(2) After the system is powered on, the system initialization is completed under the control of the signal processor 1102, and the state detection is automatically performed on each functional module of the system; after the detection is finished, if the system is normal, the system enters a subsequent working process; if the system is abnormal, a warning is sent to the user in the modes of displaying fault codes through liquid crystal, reporting alarm information and the like, and the elimination of the non-negligible fault is waited.

(3) After the system enters a normal working process, the wireless communication module 1300 establishes a wireless communication connection with the cloud service management platform under the control of the signal processor 1102, performs registration and reporting, and reports the identity and configuration information of the controller.

(4) After the report is completed, if the service management platform issues an instruction, the data acquisition controller receives the instruction through the wireless communication module 1300 and sends the instruction to the signal processor 1102 to execute the instruction according to the requirement; if the service management platform does not issue the instruction, the wireless communication is ended.

(5) The data acquisition controller acquires the time of the cloud service management platform in wireless communication, compares the time with the time information in the real-time clock module 1104, and if the time difference between the time and the time information exceeds a set threshold, the data acquisition controller automatically performs timing on the real-time clock module 1104 by taking the time of the service management platform as a reference under the control of the signal processor 1102 to ensure the basic consistency of the time of the data acquisition controller and the time of the service management platform.

(6) When the switching value receiving module 1108 receives a charging pulse signal sent by the mechanical metering instrument, the data acquisition controller first performs pulse validity determination by the signal processor 1102 according to system settings; when the charging pulse is judged to be effective, the system sets the equivalent according to the charging pulse, performs accumulation of the accumulated air volume and deduction of the residual air volume/amount, and stores the changed data in the designated position of the data storage module 1103 again; meanwhile, the signal processor 1102 judges whether the defaulting valve is required to be executed according to the current residual amount/money and a defaulting valve threshold set by a user; if the defaulting valve closing function is started and the residual air quantity/amount is lower than the defaulting valve closing threshold set by the user, the defaulting valve closing is triggered, the valve closing control module 1111 sends a valve closing control signal under the control of the signal processor 1102, a field execution mechanism is triggered to execute valve closing operation, and the wireless communication module 1300 is started to execute the report of defaulting valve closing events; when the charging pulse is judged to be invalid, the charging action is invalid, and the metering data is kept unchanged.

The equivalent setting corresponding to the charging pulse is a gas standard volume value represented by each charging pulse, the value is set by a user according to a gas flow value represented by the charging pulse sent by the metering equipment, and the principle is that the equivalent of the charging pulse at the mechanical metering instrument side and the equivalent of the charging pulse at the data acquisition control instrument side are kept consistent.

(7) When the switching value receiving module 1108 receives an alarm signal, the signal processor 1102 determines the alarm type according to the alarm path, stores the alarm information to the data storage module 1103, and executes the response operation according to the setting; the alarm path has three: a low-electricity alarm channel of the mechanical metering instrument, an under-voltage alarm channel of the mechanical metering instrument and a forced valve-closing alarm channel; generally speaking, when the data acquisition controller receives a low-power alarm of the mechanical metering device, the data acquisition controller records an alarm event to the data storage module 1103 and starts the wireless communication module 1300 to report alarm information to the service management platform; when the data acquisition controller receives the under-voltage alarm, the data acquisition controller records an alarm event to the data storage module 1103 and starts the wireless communication module 1300 to report the alarm information to the service management platform, and simultaneously determines whether to send a valve closing control signal to the field execution mechanism through the valve closing control module 1111 according to the user setting; when the data acquisition controller receives the forced valve closing alarm, the data acquisition controller sends a valve closing control signal unconditionally through the valve closing control module 1111 to control the field execution mechanism to close the valve immediately.

(8) RS485 communication between the data acquisition control instrument and the field mechanical metering instrument is executed in a timing mode, and a timing interval is set by a user through an upper computer; if the RS485 communication timing time of the data acquisition controller and the mechanical metering instrument is up, the signal processor 1102 controls the RS485 communication module 1109 to perform data communication with the mechanical metering instrument according to a set communication protocol, and information such as metering data, identity information, state data and the like of the mechanical metering instrument is acquired and stored; when the RS485 communication is performed, the signal processor 1102 simultaneously provides a power supply meeting the requirement to the mechanical metering device through the power supply output module 1110;

if the RS485 data is collected successfully, the data collection controller stores the accumulated gas amount; meanwhile, comparing the accumulated gas amount data of this time with the accumulated gas amount data obtained last time to calculate an accumulated gas amount increment, performing residual gas amount/money deduction according to the accumulated gas amount increment, and storing the changed residual gas amount/money data to the specified position of the data storage module 1103 again;

if the RS485 data acquisition fails, the signal processor 1102 re-executes the operation of acquiring the RS485 data according to a set time interval; if the failure times exceed three times, the operation of collecting the RS485 data is abandoned, and meanwhile, the wireless communication module (1300) is started to report the failure of collecting the RS485 data and reset the failure times of collecting the RS485 data.

(9) The data acquisition controller is used for acquiring the field environment data in a timing mode, and the timing interval is set by a user through an upper computer; if the timing time for acquiring the environmental data is up, the signal processor 1102 controls the environmental data acquisition module 1112 to acquire the environmental data and stores the data in the designated address of the data storage module 1103; the environmental data may be temperature, pressure, humidity and other environmental parameters; when the environmental data is collected, the data collection controller supplies power to the environmental data sensor through the environmental data collection module 1112;

the system compares the collected environment data with the upper and lower limits of the environment data set by the user, and when the actually collected environment data exceeds the specified range, the system starts the wireless communication module 1300 to report the alarm of the environment data overrun.

(10) The data acquisition controller and the service management platform are in wireless communication through the wireless communication module 1300 according to an agreed network protocol; during communication, the signal processor 1102 starts the wireless communication module 1300 to establish remote wireless communication with the service management platform, and reports metering data, system state, environmental data and the like; if the charging mode is the central charging mode, the server returns the residual amount/amount data, and the data acquisition control instrument synchronously completes the data updating of the residual amount/amount; after the reporting is finished, if an instruction is issued, the signal processor 1102 controls the wireless communication module 1300 to receive the instruction and completes the instruction execution; meanwhile, the signal processor 1102 compares the system time of the service management platform with the time in the real-time clock module 1104, and automatically performs the reference time calibration of the real-time clock module 1104 when the difference between the system time of the service management platform and the time in the real-time clock module 1104 exceeds a set threshold.

(11) The signal processor 1102 detects whether there is a key operation in real time through the human-machine interface module 1200, and executes a corresponding operation according to the key operation; the wake-up key may wake up the signal processor 1102 to light up the liquid crystal on the human-computer interface module 1200, and the left key and the right key may implement switching of a liquid crystal display page; in addition, the user can trigger specific operations through the combined keys: the left button + wake-up key may clear the off-valve control signal currently sent by the off-valve control module 1111, the right button + wake-up key may trigger the off-valve control module 1111 to send the off-valve control signal, and the right button + left button may trigger the wireless communication module 1300 to perform the instant remote communication.

(12) If the battery voltage detection time is up, the signal processor 1102 controls the battery detection module 1106 to perform the detection of the voltage of the built-in battery, so as to roughly calculate the current battery capacity and prevent the power loss outside the system; if the battery voltage is lower than the set battery under-voltage threshold, an under-voltage alarm occurs, and the data acquisition controller sends a valve closing control signal through the valve closing control module 1111; if the battery voltage value is lower than the set battery low-voltage threshold value, a battery low-voltage alarm occurs, and the data acquisition controller starts the wireless communication module 1300 to report the controller battery low-voltage alarm; converting the detected battery voltage into the residual battery capacity, and displaying through a liquid crystal display; in addition to timed battery voltage detection, wake-up key operation may also trigger battery voltage detection.

(13) If no timing service or external event input needs to be executed currently, the controller enters a sleep waiting mode to wait for the timing time of the timing service or the external event input.

In the operation process, the power conversion/distribution module 1101 automatically identifies the power supply mode of the system, and sends different power supply state identifiers to the signal processor 1102 according to the power supply mode to distinguish whether the system is powered by a built-in battery or an external direct-current power supply; the signal processor 1102 instructs the control system to enter a correspondingly set working mode according to the power supply state; the working modes mainly comprise a low-power consumption working mode and a normal working mode, and comprise the following steps: when the battery supplies power, the system enters a low-power consumption working mode; in the low power consumption mode, the system will exit the sleep mode and perform corresponding event processing in a targeted manner only when the time set by the real-time clock module 1104 is up, the system monitoring module 1107 detects that the signal is abnormal or the switching value receiving module 1108 receives the signal input, and automatically enter the sleep mode again after the event processing is completed, so as to reduce the power consumption of the system; and under the power supply mode of the external direct current power supply, the system enters a normal working mode, and all functions of the system can be customized and started under the normal working mode.

Regarding the charging mode, according to the difference of settlement mode, the charging mode of the data acquisition control instrument is divided into two types of air flow charging and money charging; in the gas charging mode, the residual gas quantity/money of the controller represents the residual gas volume quantity in the unit of m³When deducting fee, the residual gas quantity/money value is directly used to deduct the newly added gas quantity to obtain a new residual gas quantity/money value; in the charging mode of money, the 'residual amount/money' of the controller represents the residual amount and the unit 'Yuan', and the product of the newly added gas consumption and the unit price is subtracted from the residual amount/money value to obtain a new residual amount/money value when deducting the fee.

According to different modes of acquiring metering data, the data acquisition controller provides three charging modes: one is to only carry out charging according to the charging pulse, namely, the increment of the gas consumption is calculated according to the number of the charging pulse and the equivalent of the charging pulse, the increment of the gas consumption is added to the last accumulated gas consumption to obtain new accumulated gas consumption, and the gas consumption increment is deducted by the last residual gas quantity/money to obtain new residual gas quantity/money; one is based on the metering data collected by RS485, the record of the accumulated gas consumption and the deduction of the residual gas quantity/money amount are carried out; and the third is a charging pulse and RS485 data composite charging mode, namely, the charging pulse is used as a basis to complete the real-time accumulation of accumulated amount and the real-time deduction of cost, and when the RS485 acquisition time is up, the accounting is performed according to the acquired RS485 data, so that the problem of data inconsistency of the metering equipment side and the controller side caused by the loss of the charging pulse is prevented.

According to whether the charge deduction is completed on site or in a cloud, the data acquisition controller provides two charging modes: one type is a central charging mode, namely the controller only takes reference to the on-site instant charging, when the controller reports the accumulated air volume data of the on-site metering equipment acquired through the RS485 communication module 1109 to the service management platform, the service management platform finishes the charging operation according to the mode set by the platform and returns the residual air volume/amount, and the controller finally records the residual air volume/amount by taking the value returned by the service management platform as the standard; the other type is a device side charging mode, namely all charging operations are completed by the controller, and the service management platform records charging information by taking the accumulated gas consumption and the residual gas/money reported by the controller as the standard.

Based on the above charging modes, the system provides ten charging modes in total, namely: charging the amount of the equipment terminal based on the charging pulse, charging the amount of the equipment terminal based on the RS485 data, charging the amount of the equipment terminal based on the charging pulse + RS485, charging the amount of the central air based on the RS485 data, charging the amount of the central air based on the charging pulse + RS485 data, charging the amount of the equipment terminal based on the charging pulse, charging the amount of the equipment terminal based on the RS485 data, charging the amount of the equipment terminal based on the charging pulse + RS485 data, charging the central amount based on the RS485 data, and charging the central amount based on the charging pulse + RS485 data; the particular charging method used may be selected by the user.

When the metering is performed based on the metering data collected through the RS 485:

RS485 communication between the data acquisition control instrument and the field metering instrument is executed in a timing mode, and a timing interval is set by a user through an upper computer; if the RS485 communication timing time of the data acquisition control instrument and the metering instrument is up, controlling the RS485 and the metering instrument to carry out data communication according to a set communication protocol, and acquiring and storing information such as metering data, identity information, state data and the like of the metering instrument;

if the RS485 data is collected successfully, the data collection controller stores the accumulated gas amount; meanwhile, comparing the accumulated gas amount data of this time with the accumulated gas amount data obtained last time to calculate an accumulated gas amount increment, deducting residual gas amount/money according to the accumulated gas amount increment, and storing the changed residual gas amount/money data again;

if the RS485 data acquisition fails, the operation of acquiring the RS485 data is executed again according to a set time interval; and if the failure times exceed three times, the operation of acquiring the RS485 data at this time is abandoned, the failure of acquiring the RS485 data is reported, and the failure times of acquiring the RS485 data are reset.

In the operation process of the system, the system can receive instructions issued by the service management platform, wherein the instructions comprise four categories of recharging, price adjustment, data query and parameter configuration, and after the instructions are issued by the platform, the controller receives and executes the instructions when the wireless communication is executed; the recharging instruction is used for realizing a remote recharging function, and after the recharging instruction is issued by the service management platform, the controller receives the recharging air quantity/money amount and accumulates the recharging air quantity/money amount to the current residual air quantity/money amount, and returns a successful recharging instruction to the service management platform; if the recharging is not successful, returning to the recharging failure, and submitting to the service management platform for subsequent operations such as recharging and the like; the price adjusting instruction is used for realizing the adjusting function of the charging unit price, and the price adjusting instruction also comprises the effective time of price adjustment; after the price adjusting instruction is issued by the service management platform, the controller receives the price adjusting instruction and executes the price adjusting instruction at regular time according to the requirement; the data query instruction is used for the service management platform to actively query the duration data information recorded by the controller side, the instruction comprises a data type and start-stop time, and the controller returns data according to requirements after receiving the instruction; the parameter configuration instruction is used for realizing the remote configuration function of the service management platform on the controller, and comprises the opening and closing of specific functions, the setting and adjustment of an alarm threshold value, the setting and adjustment of a charging mode, the setting and adjustment of a price scheme and the like; the price scheme comprises a fixed unit price, a timing step gas price, an accumulated usage step gas price and other schemes.

Regarding the wireless connection mode, the wireless communication between the data acquisition controller and the service management platform has two options of short connection and long connection; wherein, the short connection mode is a timing mode, and the wireless communication between the data acquisition controller and the service management platform is initiated and executed by the controller at regular time according to the user setting; in the short connection mode, the user instruction can be issued through the service management platform in advance, and the instruction receiving and execution are completed when the controller actively initiates wireless communication; the long connection mode is a normal online mode, and the data acquisition control instrument is wirelessly connected with the service management platform in real time; in the short connection mode, the wireless communication is initiated by the controller at regular time; in the long connection mode, the controller is communicated with the service management platform in real time through the wireless communication module 1300; the data acquisition controller can report data, states, events and the like to the service management platform in real time, and the service management platform can also issue instructions to the controller in real time to realize corresponding operation;

in consideration of equipment power consumption, repeated alarm problems and the like, any one alarm report of all alarms initiated by the data acquisition controller is only allowed to be successfully reported once every day, and if one report fails, repeated reports of not more than three times are allowed at most.

Under the condition of need, a user can use matched upper computer software to communicate with the data acquisition control instrument through the upper computer communication module 1105, and the functions of state detection, function configuration and the like of the control instrument are realized; the upper computer communication module 1105 is only turned on when the data acquisition controller is in an effective state of external dc power supply.

Claims (6)

1. The utility model provides a data acquisition control appearance based on thing networking which characterized in that includes:

the main control circuit board is used for completing system power conversion/distribution, system work control, field instrument data acquisition and processing, field device control and wireless communication control;

the human-computer interface module is electrically connected with the main control circuit board, is provided with a key and a display screen and is used for human-computer interaction between an operator and the system;

and the wireless communication module is electrically connected with the master control circuit board, is in communication connection with the service management platform, and is used for uploading field data and receiving cloud instructions.

2. The data acquisition control instrument based on the internet of things of claim 1, wherein the main control circuit board comprises a power conversion/distribution module, a signal processor, a data storage module, a switching value receiving module, an RS485 communication module and a valve closing control module, wherein the data storage module, the switching value receiving module, the RS485 communication module and the valve closing control module are electrically connected with the signal processor; the switching value receiving module is used for receiving a charging pulse and an alarm signal of the metering device; the RS485 communication module is a communication interface of the metering instrument and the data acquisition control instrument; and the valve closing control module triggers the flow controller to execute valve closing operation by outputting a control signal.

3. The data acquisition control instrument based on the internet of things of claim 2, wherein the power conversion/distribution module is powered by a built-in battery pack or an external direct current power supply, when the fact that a compliant external power supply is accessed is identified, the external power supply is automatically selected to be used for supplying power to the system, and the built-in battery enters a backup state; meanwhile, the power supply conversion/distribution module provides a state indication signal of external power access to the signal processor, and the signal processor judges the power supply state of the system according to the state signal and adjusts the working state of the system.

4. The data acquisition controller based on the internet of things of claim 2, wherein the main control circuit board further comprises a real-time clock module, an upper computer communication module, a battery detection module, a system monitoring module, a power supply output module and an environmental data acquisition module which are electrically connected with the signal processor.

5. The data acquisition control instrument based on the Internet of things of claim 4, wherein the system monitoring module comprises a power supply monitoring circuit and a hardware watchdog circuit, and is used for monitoring the stability of a system power supply and the working state of system software in real time;

the environment data acquisition module comprises a temperature sensor, a pressure sensor and a humidity sensor which are used for acquiring environment data.

6. A data acquisition control system based on the Internet of things comprises a metering instrument and a flow controller, wherein the data acquisition control instrument of any one of claims 1 to 5 is arranged between the metering instrument and the flow controller; the metering instrument is arranged on the pipeline; the flow controller is an IC controller and is used for executing valve closing operation; the data acquisition control instrument is in communication connection with the service management platform in a wireless communication mode to execute remote tasks.

Images