RU2449346C1 - Apparatus for collecting, processing and transmitting telemetric information - Google Patents

Abstract

FIELD: information technology.

SUBSTANCE: apparatus for collecting, processing and transmitting telemetric information, having a housing which can be attached to a horizontal and a vertical surface, a printed-circuit board accommodating a power supply unit with a power monitor, a microcontroller with large random-access and read-only memory, a real-time clock with built-in nonvolatile memory and a backup lithium battery, an RS-232 interface converter, an RS-485 signal interface converter with a galvanic decoupler unit.

EFFECT: low power consumption of the system for collecting telemetric information and high rate of communication.

4 cl, 1 dwg, 1 tbl

Description

The invention relates to the field of computer technology, namely to devices for collecting, processing and transmitting data, and can be used as part of automated information-measuring and control systems (AIIIUS) in various industries.

The prior art device for collecting, processing and transmitting data containing a secondary voltage converter, a microcontroller with a real-time clock, collecting measurement information using a discrete signal input module, processing and transmitting information through signal converters of RS-232 interfaces, non-volatile memory , display module, power supervisor and lithium battery (patent RU 59861 U1, 06/05/2006, published 12/27/2006, bull. No. 36).

A disadvantage of the known device is the lack of a single-wire 1Wire interface for connecting environmental measurement sensors, an Ethernet network interface and a USB interface, as well as PLC power line communication interfaces, ZigBee and WiFi radio channels, which significantly reduces the device’s functionality and limits the area its application, for example, in systems such as "smart home", and the lack of protection against intentional falsification of measured values and from unauthorized opening or Amenable damage to the instrument case reduces the reliability level of the data obtained.

These disadvantages are partially eliminated in the known single-board device containing a microcontroller that collects, processes, and transmits measurement information, a real-time clock module that informs the microcontroller of accurate astronomical time, non-volatile high-capacity memory for storing the device configuration and information collected by the microcontroller, characterized in that it equipped with a wireless GPRS interface module, a replaceable PLC, Zigbee interface module (patent RU 99203 U1, 04/30/2010, published November 10, 2010, bull. No. 31).

A disadvantage of the known device is the lack of an Ethernet interface in its composition, which does not allow it to be included as a subscriber in the composition of local networks with TCP / IP protocol, the absence of a USB interface does not allow Flash memory modules to be connected to the controller for initial program loading, and the absence of a single-wire 1Wire interface for connecting sensors measuring environmental parameters limits the scope of its application as part of “smart home” systems, and the lack of protection measures against intentional falsification of measured and Achen tamper or intentional damage to the enclosure reduces the reliability of the data.

Closest to the claimed device is a controller made in the form of a housing, in which a printed circuit board is installed with a microcontroller located on it, which receives information from digital inputs and an RS-232 port and transmits received information via an Ethernet interface, as well as non-volatile memory, and the housing equipped with attachments to a horizontal or vertical supporting surface and equipped with a network cable socket for connecting to a 10 / 100Base-TX switch (patent RU 2348966 C1, 02.21.2008, published March 10, 2009, Bulletin No. 7) (about otip).

The presence in the well-known Ethernet interface controller partially eliminates the noted drawbacks, but the lack of a high-speed universal LTE / UMTS / GSM radio channel and 1Wire interface for connecting external sensors narrows its scope, and the absence of measures to protect it from falsification of measured values and from unauthorized opening or damage to the instrument case reduces its reliability as an element of automated information-measuring and control systems of critical automation objects, such as, for example, nuclear power engineering, oil and gas processing, etc.

The problem to which the claimed technical device is aimed is to reduce the power consumption of the telemetry information collection system by disconnecting the power supply from the sensors that are inactive in this measurement cycle, increasing the wireless exchange rate to 100 Mbps by installing a high-speed universal fourth-generation LTE modem / UMTS / GSM, increasing the level of information protection against falsification by installing a special unit for generating a unique 64-bit device serial number a, protecting the device against unauthorized opening of the housing through the installation under the lid opening detecting sensor body or damage to the device body, expanding the arsenal of technical means in the art.

The solution to this problem is achieved due to the fact that the device for collecting, processing and transmitting telemetric information, comprising a housing with the possibility of mounting on a horizontal and vertical surface, a printed circuit board on which a power supply unit with a power supervisor, a microcontroller with large and random-access memory is large, real-time clock with built-in non-volatile memory and a lithium backup battery, RS-232 interface converter, RS-485 interface signal converter with galvanic isolation unit, 1Wire single-wire interface unit, discrete telemetry input unit, two Ethernet interface units, USB interface unit, replaceable PLC, ZigBee, WiFi interface module, characterized in that it additionally includes a power control unit for sensors connected to the 1Wire interface, unit fourth-generation LTE / UMTS / GSM high-speed universal modem, a unit for generating a unique 64-bit device serial number, and a protection unit against unauthorized opening or intentional damage to the housing The device, moreover, the microcontroller and the real-time clock can be made in the form of a single microcircuit, the unit for generating a unique 64-bit serial number of the device can also be made in the form of a single microcircuit, and the protection unit against unauthorized opening or intentional damage to the device’s case can be made in the form microswitches.

The technical result provided by the given set of features is to reduce the power consumption of the telemetry information collection system by disconnecting the power supply from the sensors that are inactive in this measurement cycle, increasing the exchange rate over the wireless network to 100 Mbps by installing the fourth-generation high-speed universal modem LTE / UMTS / GSM, increasing the level of information protection against falsification by installing a unit for generating a unique 64-bit device serial number, is provided e tamper or willful damage to the device body through the installation under the cover of a special sensor body for detecting the fact tampering or willful damage to the device body, to expand the arsenal of technical means in the art.

In the process of searching the sources of scientific, technical and patent information, no device was found that possessed the same set of essential features and provided the technical result stated above. This circumstance allows us to conclude that the invention is a technical solution to the problem, is new, has an inventive step and is industrially applicable.

The proposed device for the collection, processing and transmission of telemetric data is illustrated in figure 1. The device contains a block 1 of a primary converter of alternating voltage ~ 220 V to DC, blocks 2 and 3 of a secondary converter of supply voltage for all nodes of the device, block 4 of a high-speed universal modem of the fourth generation LTE / UMTS / GSM, block 5 of the RS-232 interface, block 6 RS-485 interface, block 7 of the optoelectronic isolation of the RS-485 interface from external circuits, blocks 8 and 9 of two Ethernet network interfaces, block 10 of the USB interface, block 11 of discrete input, block 12 of the replaceable interface module PLC, ZigBee, WiFi, block 13 microcontrol Oller, block 14 of the supply voltage supervisor, block 15 of the control voltage supply sensors, block 16 of a single-wire interface 1Wire, block 17 hours of real time RTC with backup power from block 18 of a lithium battery, block 19 of the serial number of the device, block 20 of RAM SDRAM, block 21 program memory NAND FLASH, block 22 of the tamper evident sensor and block 23 of the device.

The device operates as follows. The supply voltage ~ 220 V AC is converted by the primary converter (block 1) into a DC voltage, which is then converted into a voltage of 12 V (block 2) and a voltage of 3.3 V (block 3) DC. As soon as the voltage of 3.3 V reaches the specified operating level, the power supervisor (block 14) will remove the reset signal from the microcontroller (block 13) and the microcontroller will load from the permanent memory (block 21) into the RAM (block 20) of all system components in the automatic mode in the following sequence:

- the database (DB) is loaded, which contains the current configuration of the installed drivers;

- The Driver Manager is loaded, which, in accordance with the current configuration, downloads all registered drivers;

- the device enters the "Work" mode.

In the "Work" mode, in accordance with the algorithm, the reception and processing of pulsed telemetric signals from meters of electricity, gas, water, steam, etc., connected to the discrete signal input unit (block 11), and information is received in digitally from other metering devices connected to the RS-232 (block 5) and RS-485 (block 6 and 7) interfaces, from metering devices transmitting data through a PLC modem (power supply lines ~ 220 V) and a ZigBee wireless radio network and WiFi (removable unit 12). Sensors for monitoring environmental parameters (temperature, humidity, light, smoke, etc., for example, in “smart home” systems) are interrogated via a 1Wire single-wire interface (block 16) in energy saving mode, which includes four stages:

- the first stage is the supply to the sensors of electrical power through a key controlled by the microcontroller (block 15),

- the second stage - holding the set time for warming up the sensors in order to achieve their nominal metrological characteristics,

- the third stage is a survey of sensors,

- the fourth stage is the power off of the sensors (block 15).

The processed data is placed in a single database and then, upon request or according to a predefined time schedule, controlled by real-time clock (block 17), transmitted to the central control center (DPC) via two Ethernet network channels (blocks 8, 9) and a high-speed universal radio modem LTE / UMTS / GSM (block 4).

Since the device for collecting, processing and transmitting telemetric information accumulates and stores in the database credentials about the consumed material and energy resources collected from primary metering devices (meters), attempts may be made to unauthorized opening the device’s case and making changes to its design or algorithm for working with the purpose of falsification of data. To increase the degree of protection of the device from unauthorized opening of the case, a sensor for detecting and fixing the fact of opening or damage of the case in the database is introduced into the database (block 22). When the device case is opened, the sensor provides a discrete signal to the microcontroller unit, which writes a bit of the case opening sign into the non-volatile database memory with a time stamp, and transmits a warning message to the DAC.

To detect an attempt to completely replace a genuine device with a fake one in order to falsify data, a unique 64-bit serial number of the device (block 19) is introduced into its design, which is read out by the microcontroller via the I2C interface and transmitted to the DAC as the device identification number in each communication session. Physically, block 19 is implemented in the form of a specialized microcircuit, in which the manufacturer uses a laser beam to write a unique 48-bit serial number + 8-bit code of the device family + 8-bit CRC code into the read-only memory (ROM). The CRC code is calculated according to the well-known algorithm using the generatrix polynomial X ⁸ + X ⁵ + X ⁴ +1 and serves to control the integrity of the 64-bit serial number in ROM.

The USB interface (block 10) is used to connect a portable computer to the device, with which the user can verify operation and configure the device.

The proposed device for collecting, processing and transmitting telemetric information can be widely used in industrial automation systems, in systems such as "smart home", in urban management systems, etc.

The proposed device for the collection, processing and transmission of telemetric information can be practically implemented using materials and components of various manufacturers. As an option, the device was implemented using the components shown in the table. The tests of the device confirmed the claimed technical result.

Block number product name Type of amount one Primary converter Rectifier B8S one 2 Secondary converter UCC28600DR, transformer one 3 Secondary converter TPS5430DDAR, LM1117 2 four Modem LTE / UMTS / GSM Qualcomm MDM9200 one 5 RS-232 interface MAX3243ECDBR one 6 RS-485 interface MAX13487EESA one 7 Optoisolator ISO7221ADR one 8 Ethernet Interface 1 KSZ8721CL one 9 Ethernet 2 interface KSZ8721CL one 10 USB interface Integrated in AT91SAM9G20 one eleven Discrete input SN74LV165APWR one 12 Plug-in interface module PLC, ZigBee, WiFi ST7540, MRF24J40 3 13 Microcontroller AT91SAM9G20 one fourteen Food supervisor TPS3809K33DBVR one fifteen Sensor Power Management IRLML5203 one 16 1Wire Interface DS2482S-100 one 17 Real time clock DS1338Z-33 one eighteen Lithium battery CR2032 one 19 Unit for generating the serial number of the device DS28CM00R one twenty SDRAM K4S561632J 2 21 NAND Flash memory unit K9F1G08U0B one 22 Tamper sensor Micro Button BS-A2B-1D-A-Z one 23 Body Standard plastic one

Claims (4)

1. A device for the collection, processing and transmission of telemetric information, comprising a housing with the possibility of mounting on a horizontal and vertical surface, a printed circuit board on which a power supply unit with a power supervisor, a microcontroller with large and random access memory, a real-time clock with built-in non-volatile memory and lithium backup battery, RS-232 interface converter, RS-485 interface signal converter with galvanic isolation unit, single-wire int 1Wire interface, input block for discrete telemetry signals, blocks of two Ethernet interfaces, USB interface block, plug-in PLC, ZigBee, WiFi interface module, characterized in that it additionally includes a power control unit for sensors connected to the 1Wire interface, a fourth-generation LTE high-speed universal modem unit / UMTS / GSM, a unit for generating a unique 64-bit serial number of the device and a protection unit against unauthorized opening or intentional damage to the device case. 2. The device according to claim 1, characterized in that the microcontroller and the real-time clock can be made in the form of a single chip. 3. The device according to claim 1, characterized in that the unit for generating a unique 64-bit serial number of the device can be made in the form of a single chip. 4. The device according to claim 1, characterized in that the unit of protection against unauthorized opening or intentional damage to the housing of the device can be made in the form of a micro switch.