RU2678157C1 - Multifunctional wireless controller - Google Patents

Abstract

FIELD: electronic technology.SUBSTANCE: invention relates to a multifunctional wireless controller. Controller contains a microprocessor that provides processing of the information received from external objects, writing to four independent non-volatile memory archives, the function of the real-time clock, the function of setting the archive interval is a multiple of 5 minutes, after which it will be recorded in four independent archives and transmitted to the server, management and control of GSM/GPRS-module and 2 MB nonvolatile memory for storing four independent archives, USB interface, RS485 interface for connecting external devices, GSM/GPRS module with antenna for continuous two-way communication with a control center via a server, external control nodes objects, node matching input discrete signals of six galvanically isolated channels to obtain information about the state of external objects, measurement and processing of current signals on four channels in the range of 0.000–0.020 A, power off of GSM/GPRS-module for 9 minutes, software switching on and off of control relays by a given flexible algorithm, installation of different modes of operation on the Internet, without using the Internet.EFFECT: technical result consists in increasing the reliability of continuous measurement of signals from external objects.7 cl, 2 dwg

Description

The multifunctional wireless controller is designed for data collection and archiving in four independent Archives from geographically remote objects, such as artesian wells, elevator facilities, as well as meters for water, heat, gas, electricity and other utility metering devices and remote control of these objects . Four control channels by relay. The objects of control can be electric motors of artesian wells, streetlights, and so on. It can also be used in oil industry facilities.

According to its functional purpose, a similar “Device for dispatching geographically dispersed objects” is known (RF Patent No. 2237286), which contains a set of geographically separated terminal devices connected using adapters, each of which contains a microcontroller, a GPS receiver and a GSM module equipped with an antenna, through a GSM network containing a GPRS packet messaging system and an SMS short message center, with a dispatch center providing reception, storage, processing and analysis of messages communications from terminal devices.

The disadvantage of this device is that the transmission of information is based on system frames that are synchronized by timestamps received from the GPS receiver and are always made at the time of synchronization, and not at the request of the control center or at the desired time interval that the user sets . The disadvantages include the use of an additional channel of the GSM network, which leads to the use of non-standard equipment and, as a result, the implementation and operation become very expensive.

Closest to the claimed one is the "Multifunctional Wireless Controller" (RF Patent for Utility Model No. 81359 of November 14, 2000), which is designed to collect data from geographically remote objects, such as artesian wells, elevator facilities, as well as water metering devices , heat, gas, electricity and other metering devices of municipal services and remote control of these facilities.

The disadvantage of this device is the use of non-volatile memory for storing previously accumulated data and an emergency in a common space, storing them only for the time the mains power fails and cleaning it every time after transfer to the control center due to the small capacity of non-volatile memory-128 Kbytes.

The disadvantages of this device also include the fact that the relay is controlled remotely from a PC located at the control room. If communication with the control center is interrupted for a long time, it is impossible to turn the relay on or off remotely until the communication with the control center is fully restored.

A significant drawback of this device is the lack of battery life in the absence of communication with the control center or the use of remote communications for several seconds a day, weeks or months to read the accumulated data.

Another significant drawback of this device is that it is not possible to read previously accumulated data in the complete absence of communication with the control center for various reasons: the MBK SIM card failed, PC malfunctions at the control room, etc.

The disadvantages of this device include the lack of remote power off in critical situations.

The technical result of the claimed device is to ensure reliable operation, both offline and on the Internet, for continuous measurement of analog, frequency signals, monitoring and control of remote objects, as well as the use of different modes of working with the Internet in order to save money on maintenance.

The advantages of the claimed device are also the following features: the presence of a complete offline mode without using the Internet; the ability to programmatically disable the GSM / GPRS module node from 1 minute to 10 days; using the Internet only for reading data from four independent archives and accumulated data once a day; the possibility of continuous operation on the Internet; the presence of four independent archives with a total volume of 2 MB - Archive of current values, Daily Archive, Archive of emergency situations and Archive for storing measured analog signals with a storage depth of all four Archives for up to three months;

A particular advantage of the claimed device is the ability to set the Archiving interval in multiples of 5 minutes: [5; 10; 15; 20 ... 55; 60]. This means that with the Archiving interval of 5 minutes, the depth of the current Archive will be 1.7 months, with 10 minutes it will be 3.4 months, with 15 minutes it will be 5.1 months, with 20 minutes it will be 6.8 months and so on and finally at 60 minutes it will be 8.5 years. And the ability to change the Archiving Interval programmatically at any time.

The ability to programmatically turn on and off relay channels according to a given schedule sequentially up to three times a day on four channels independently; the ability to read Archives and accumulated values on a laptop, remote drive or flash card when disconnected from the Internet using the USB interface.

An advantage of the claimed device is also an increase in the resolution of the ADC from 10 to 12 bits, which increases the resolution and, as a result, the accuracy of measuring analog signals, that is, currents.

An advantage of the claimed device is also an increase in the number of control nodes from 2 to 4, which increases the number of managed objects.

One of the important advantages of the claimed device is also a remote power off mode with the ability to automatically recover after 9 minutes in the event of critical situations, both at the command of the operator from the control center and with the help of a CMC message. At the operator’s command, it is possible to disconnect the power supply remotely for up to 4 hours with automatic power-on after this time.

The advantages of the claimed device are also the following features: reliable continuous two-way communication with the server is ensured without the participation of external devices and without the participation of service personnel, two-way communication allows not only monitoring of remote objects, but also their management, primary sensors are connected directly to the Multifunction Wireless Controller, which processes the incoming signals, converts them into digital form and archives in four independent archives, the ability to connect current sensors with currents from 0 to 100 Amperes, the continued operation of the device in the event of a loss of Internet connection, the availability of the device in winter at sub-zero temperatures.

The above technical result is achieved in a multifunctional wireless controller (1), the structural diagram of which is shown in Figure 1, which contains a microprocessor with software implementation of a real-time clock (11), non-volatile memory for four independent archives (6, 7, 8, 9), a USB interface (4), RS485 interface (3), GSM / GPRS-module (12) with an antenna (28), four nodes for controlling external objects (17, 18, 19, 20), with a galvanically isolated six-channel node for matching discrete input signals (16) ), four-channel knots scrap converting current to voltage (10), with backup power (30), temperature sensor (13). The microprocessor (11) provides the programmed real-time clock, processes the received information from external objects, translates the information into a digital code, writes it to non-volatile memory for storage and prepares it for transmission over wireless communication, the function of setting the time interval after which the whole information is automatically transmitted to the control center, control and monitoring of the GSM / GPRS-module for continuous two-way communication with the control center via the Internet. The microprocessor constantly monitors the state of communication with the control room and restores it in the event of a loss of communication. If the GSM / GPRS module is completely stuck, the microprocessor shuts off the power to the module for 9 minutes and after this time it turns it on again and carries out the process of establishing a TCP / IP session via GPRS and the Internet. Having received control commands from the server, it writes them to the EEPROM and subsequently the microprocessor with their help autonomously controls external objects, for example, turns street lights on or off using four external object control nodes (17, 18, 19, 20) or electric motors of artesian pumps . Measurement of analog signals from sensors with current outputs connected to a unit for converting current to voltage (10) is performed by an internal 12-bit ADC of the microprocessor. The coordination node of the input discrete signals (16) has 6 inputs and is galvanically isolated from external objects. On these inputs, discrete “on / off” signals are received, therefore they are used as inputs of alarm sensors. One of the same channels can be used to measure the frequency and count the number of pulses as a counter when a primary sensor with a frequency output, for example, a liquid flow sensor, is connected to this input, a flow meter is implemented to measure both instantaneous and integral liquid flow. This mode is set remotely by issuing a command from the server. The multifunctional wireless controller is powered by an analog power supply unit (23), implemented on the basis of a 220V network transformer. The line filter (22) is used both to suppress impulse noise coming from the network, and to protect the network itself from high-frequency interference. As a backup power supply, a 3.7 V lithium-ion battery (30) was used, the charge of which is provided by the battery charge unit (24). Charging is carried out in the mode of a drop charge. The backup power supply is used for a short time to transmit information about the loss of mains power to the control room and write to this non-volatile memory (8) this contingency situation, as well as saving information accumulated for a given time to the non-volatile memory and to power the clock. Software-implemented real-time clocks are designed to bind to the date and time, up to a second, four Archives recorded in non-volatile memory. Switching to backup power is done by the switch (25) automatically. The real-time clock continues to run on backup power. After restoring the mains power, the multifunctional wireless controller independently restores the connection and transmits information on restoring the mains power to the control room and writes the same information to the Emergency Situations Archive with reference to the date and time. The temperature sensor (13) is used to measure the temperature inside the case of the multifunctional wireless controller. The RS485 interface (3) is designed to connect external devices with the same interface, and it is possible to connect up to 32 external devices over a distance of up to 1200 m via twisted pair cable. The USB interface (4) is designed to connect a laptop, remote control or flash drive cards, for reading archives and accumulated data, for working in a mode without using the Internet and for setting up the MBK itself. GSM / GPRS-module (12) with antenna (28) is designed for continuous two-way communication with the control center via the Internet.

A multifunctional wireless controller operates as follows. First, the setting is made: a SIM card is inserted into the SIM / GSM card holder of the GSM / GPRS module (12), the multifunctional wireless controller is connected via a USB interface (4) to the computer, through which the IP address and server port are written to the multifunctional wireless controller, drivers with communication protocols of serviced devices and other parameters, which include, inter alia, the polling interval, i.e. time interval after which all information is transmitted to the server. The polling interval is set from 3 minutes to 5 minutes. The MBK operating modes are also recorded: the user, depending on the task, decides whether to receive information in real time, once a day or once every 10 days, whether to use the Internet or not, etc.

At the installation site, input and output signals are connected to the multifunctional wireless controller via terminal blocks (2, 5, 14, 15, 26, 27, 28, 29) to collect information and control. A ~ 220 V network cable is connected to terminal block (21). Immediately after turning on the mains power, the multifunctional wireless controller establishes communication with the server through the GPRS and Internet systems and maintains continuous communication. At intervals according to the polling interval, all received and processed information is transmitted to the server and copied in parallel in the corresponding four Archives. In the event of a signal from the alarm sensors, this information is transmitted immediately to the server, regardless of the set polling interval. In the absence of communication with the server, the MBK continues to work offline, recording current values, daily, emergency situations and measured values of analog signals (currents) in the corresponding four Archives in non-volatile memory (6, 7, 8, 9), and when communication is resumed the contents of all four Archives can be counted on command from the server and the Archives can be cleared. In the process, the user at any time has the opportunity to interrogate and change all the parameters set during the setup process in the multifunctional wireless controller from the server.

Figure 2 shows a structural diagram of a dispatch system organized on the basis of a multifunctional wireless controller. In remote places where objects intended for monitoring and control are located, multifunctional wireless controllers are installed (1). To the RS485 interface (29) of the multifunctional wireless controller, devices with an RS485 interface are connected, such as electricity meters (30), heat meters or water flow meters, gas flow meters, PTN-3 with current sensors from 0 to 100 Amperes, for example, for measuring currents three phases of a well pump electric motor with an appropriate interface, etc. (31) connected to primary devices (32) located in a radius of 1200 m to 32 pieces.

Alarm inputs sensors and other discrete signals are connected to inputs (33), a sensor with a frequency output, such as a vortex electromagnetic signal converter (VEPS) for liquid flow, sensors with standard current outputs (0-20 mA) can be connected to the sixth discrete channel, such as pressure, level and temperature sensors. Up to four objects intended for control by relay switching are connected to the control outputs of external objects (34). Multifunctional wireless controllers are connected to the server via GPRS and the Internet (39). Information transfer between the multifunctional wireless controller and the server is based on the TCP / IP protocol. At the control room is a computer connected to the Internet.

Claims (7)

1. A multifunctional wireless controller containing a microprocessor that processes the received information from external objects, translates the information into digital code, records in four independent non-volatile memory archives according to the archiving period and upon request from the server for transmitting it wirelessly, software implementation of the real-time clock function , the function of setting the archiving interval is a multiple of 5 minutes, but not more than 60 minutes, after which they will be recorded in four independent archives and given to the server, control and monitoring by GSM / GPRS-module and non-volatile memory with a capacity of 2 MB for storing four independent archives, USB, RS485 interface for connecting external devices, GSM / GPRS-module with antenna for continuous two-way communication with the control center via the server , by control nodes of external objects for implementing control of four external objects, by a coordination node of input discrete signals of six galvanically isolated channels to obtain information about the state of external objects goods, including from alarm sensors, measuring and processing current signals on four channels in the range from 0,000 Amperes to 0,020 Amperes, disconnecting power from the GSM / GPRS module for 9 minutes, programmatically turning on and off the control relays according to a given flexible algorithm, installation of different operating modes on the Internet - continuous scanning of archives once a day, once every 10 days, without using the Internet - reading of archives and accumulated data via a USB interface, ensuring the autonomous operation of the MBK regardless of whether there is a connection to the server with a 5-minute archiving interval of up to 1.7 months, with an increase in the archiving interval by a factor of 5 minutes, autonomous operation also increases by a multiple. 2. The multifunctional wireless controller according to claim 1 is characterized in that it is configured to connect to it via the RS485 PTN-3 interface for measuring the currents of three phases of electric motors A, B, C up to 100 Amperes through three galvanically isolated channels. 3. The multifunctional wireless controller according to claim 1 is characterized in that the USB interface is designed to read four independent archives and accumulated data and to work offline, as well as to connect the multifunctional wireless controller to a computer for configuration. 4. The multifunctional wireless controller according to claim 1 is characterized in that it can operate autonomously without using the Internet. 5. The multifunctional wireless controller according to claim 1 is characterized in that it transmits all contingency events that occur during the exchange of information with sensors and devices connected to external MBK installed at the controlled objects. 6. The multifunctional wireless controller according to claim 1 is characterized in that the microprocessor constantly monitors the state of communication with the server and, in a critical situation, turns off the power of the GSM / GPRS module for 9 minutes, performing all other functions without any damage, after 9 minutes the connection is restored . 7. The multifunctional wireless controller according to claim 1 is characterized in that the archiving interval is set by the command from the control center in multiples of 5 minutes: [5, 10, 15, 20 ... 60], after which all the accumulated information and emergency situations are recorded in four independent archives and transferred to the server.

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