RU2143745C1 - Telemetry system for stationary and mobile objects - Google Patents

Abstract

FIELD: telemetry equipment, in particular, for monitoring of objects which are remote from control center. SUBSTANCE: each signal apparatus has multiplexer, single chip computer, converter of logical signal to joint signals, low-pass amplifier, unit of electronic gates, additional output port of microcomputer, digital-to-analog converter, read-only memory unit, which stores voice and tonal signals, RAM memory unit, unit for matching output analog signals to telephone line, inductor call detector, duplex transmitter. Receiver provides possibility to receive and process messages. Stationary objects are monitored by displaying object image on computer screen together with three- dimensional position of triggered detector or group of detectors and storage into database. Mobile objects are monitored by displaying landscape map of given scale on computer screen together with current position of mobile object and characteristics of triggered detectors and storage into database. In case of fault in computer equipment, device provides transmission of voice information about object index and index (indices) of triggered detector. EFFECT: increased functional capabilities, increased reliability of operations due to use of frequency-keyed low-speed code. 4 cl, 4 dwg

Description

 The invention relates to telemechanics, in particular to a television alarm system (TS), and can be used for remote monitoring of spatially separated stationary and mobile objects.

 Known TS systems contain a command and receiving device, as well as communication channels for transmitting TS commands, moreover, an amplifier, a first transmitter and a second receiver (first transceiver) are included in the command device, and the receiver includes a first radio receiver and a second transmitter (second transceiver) and an information display device (RU 2059293, 04/27/96, G 08 C 19/12).

 However, this system does not provide the possibility of expanding the number of sensors for monitoring mobile objects.

 The technical result of the invention is to expand the functionality of the system and increase the reliability of message transmission through the use of frequency-manipulated low-speed code (FMN code).

 The structure of the vehicle system includes in each i-command device remote control and control equipment (ACU), designed to create control networks for stationary and mobile objects based on wire and cellular telephone networks, which are communication channels for transmitting vehicle commands.

 Thus, it is possible to control N objects (both stationary and mobile) and to control K parameter sensors at each i-object.

 Remote control equipment includes two types of devices: AKU-D and AKU-O.

 AKU-D is a component of the receiving device and is intended for control (programming), interrogation and collection of information from remote objects. AKU-D is connected via the RS-232 port to a personal computer and a telephone line (figure 1).

 AKU-D is installed in special control rooms.

 AKU-O is installed at remote sites and is designed to monitor the status of sensors, as well as a GPS receiver (a GPS device designed to determine the geographic coordinates of an object, speed and direction of its movement, which is part of the Global Position System satellite navigation system). AKU-O is connected to a telephone line or mobile phone equipped with a telephone line adapter.

 In fact, AKU-D and AKU-O are modems: converters of signals from sensors and GPS to the RS-232 interface format.

The main technical characteristics of AKU:
The number of serviced sensors on one AKU-O is up to 32.

 Information transfer rate - 100 bit / s. Low transmission rate due to increased requirements for reliable communications and small amounts of transmitted information.

Information is transmitted in a frequency-manipulated manner and is received without distortion with degraded characteristics of the communication line (especially mobile communication systems), such as:
- skew amplitude-frequency characteristics of 15 ... 20 dB in the operating range of 0.3 ... 3.4 kHz,
- increased noise (signal to noise ratio up to 2),
- short-term interruptions in the communication channel (up to 10 s).

 Type of dialing - pulse or tone.

 Type of information transmitted from AKU-O: FMN code or voice message.

 In FIG. 1 shows a block diagram of the proposed television alarm system, where in each i-command device (total N) AKU-O (1) is connected to K-sensors of parameters 1, tone telephone 8, GPS receiver 4 (for mobile version), speaker 6 and loaded on the communication channel III for transmitting vehicle commands to the receiving device 11 through the PBX network IV.

 Moreover, each AKU-OI (figure 2) contains: multiplexer 2, single-crystal microcomputer 89C51 (F = 12 MHz) 3, a converter of the logical signal to the interface signal RS-232 (5), a low-frequency amplifier (VLF) 7, an electronic unit keys 9, an additional port conclusions of the microcomputer 10, a digital-to-analog converter (DAC) 11, a ROM for storing speech and tone signals 12, a random access memory (RAM) 13, a node for matching output analog signals with a telephone line 14, an inductor call detector 15, tone receiver 16, low pass filter (low-pass filter) 17, d the complex transceiver 18.

The receiving device 11 (figure 3) contains:
duplex transceiver 34, tone telephone 19, electronic key block 9, single-crystal microcomputer 89C51 (F = 12 MHz) 3, additional output port of microcomputer 10, digital-to-analog converter (DAC) 11, ROM for storing speech and tone signals 12, random access memory ( RAM) 13, a low-pass filter (LPF) 17, a matching node for outputting analog signals with a telephone line 14, an inductor call detector 15, a tone receiver 16, an IBM 20 series computer, an information display device 21.

 Figure 4 shows the duplex transceiver 18 NOKIA 10 WLL terminal used in a cellular network and equipped with a telephone line adapter.

 The TS system (STS) operates as follows.

Work Algorithms:
1. Management (programming),
Remote objects are controlled remotely through the telephone line (hereinafter, the communication channel) in the receiving device.

Management teams include:
- Assignment of an identification number AKU-O (from 1 to 999),
- Record of phone numbers where notification will be made from AKU-O (up to four),
- masking (blocking) of individual AKU-O sensors (from 1 to 32),
- recording of logical levels of operation (0 or 1 each) of individual AKU-O sensors (from 1 to 32)
- operating modes: removal or putting into standby mode.

 2. Standby mode.

 In standby mode, the AKU-O constantly polls the status of the sensors and GPS receiver.

 If any of the sensors is triggered, AKU-O dials into the control room on one of the four available phones in memory and reports a violation in the FMN code. When the receiver computer is turned off, messages about the state of the sensors are transmitted over the telephone line by voice. In all cases, the AKU-O identification number and sensor numbers are transmitted where the state change is recorded. Upon request, the AKU-O transmits GPS receiver data from the receiver.

 3. Interrogation mode (interrogation mode is also valid in case of AKU-O operation in standby mode).

 Remote objects are polled from the central control room remotely via a communication channel.

Poll commands include:
- transmission of the operating mode AKU-O (on duty or not),
- transmission of the identification number AKU-O,
- transmission of the state of the sensors,
- transmission of information from the receiver.

 Note: Poll mode commands and control mode commands can be combined, i.e. interrogation and management can occur quickly in one communication session. The duration of the communication session AKU-D and AKU-O is unlimited.

Description of the components AKU-O, AKU-D
1. Single-crystal microcomputer (OEWM) (3 figure 2, 3) is designed to control all elements of the electrical circuit of the equipment.

 Using OEVM, algorithms for receiving / transmitting tonal and ringing signals along the line, interrogating sensors and control buttons, dialing numbers, controlling display and audible alarms, as well as servicing the serial input interface from a GPS receiver, are implemented using an OEVM; clock frequency 12-24 MHz.

 2. Permanent storage device (ROM) (12) is designed to store data memory (including voice messages) and commands for the computer. It is connected to the OEVM system bus and is a standard LSI of the INTEL 27C512 family with a capacity of 64 KB.

 3. The random access memory (RAM) (13) is designed to store information related to the operating mode of the ACU-O (identification number, operating mode, telephone numbers for self-dialing in case of an emergency, a verbal description of the state of the sensors) and operational information related with the reception of tones. The RAM is connected to the OEVM system bus and is a standard 8 kB INTEL 6264 LSI family.

 4. An additional microcomputer output port (10) is used to organize an 8-bit logic level signal output port, to control an electronic key block (9), an analog output matching unit with a telephone line (14), and a low-frequency amplifier (7). An additional output port is connected to the system bus of the computer and is a parallel-bit register.

 5. The digital-to-analog converter (DAC) (11) is intended for the synthesis of tonal frequency signals, as well as for the synthesis of voice messages. It is connected to the OEVM system bus and is a resistive set (R, 2R ...) connected to a parallel 8-bit register.

 6. The node matching the output analog signals with the telephone line (14) is intended for electrical matching of signals with the DAC (11) into the telephone line signals. It is a transistor matching circuit. The signal matching node is switched on from the additional output port.

 7. The low-pass filter (LPF) (17) is designed to filter the higher harmonic components of the tonal and speech signals synthesized using the DAC. It is an active 4th-order low-pass filter.

 8. The low-frequency amplifier (VLF) (7) is designed to amplify and coordinate speech and tonal signals from the LPF output with a loudspeaker. The amplifier is turned on / off by signals from the additional output port 10. It is a VLF chip for telephony.

 9. The inductor call detector (15) is designed to detect a ringing signal. It is a two-threshold device (25V and 80V) and is connected to the input port of the computer. Upon the appearance of a signal with a frequency of 20 ... 30 Hz from the detector, the computer makes a decision about the presence of a call signal on a telephone line.

 10. The receiver of tonal frequencies (16) is designed to amplify and clip to the logical level of received tones, connected to the input port of the computer and is a linear amplifier and an analog comparator. Using the receiver of tonal frequencies OEVM receives information transmitted over the telephone line.

11. The block of electronic keys (9) is designed to implement such functions as:
- occupation of the line (creating a low-resistance loop),
- dialing (closing / opening the telephone line),
- enable / disable the parallel telephone. The unit is controlled by signals from an additional output port and is a set of high-voltage transistor switches and relays for disconnecting a parallel telephone (when occupying the AKU-O line).

 12. The converter of the logical signal to the RS-232 interface signal (5) is intended for the electrical matching of the GPS receiver with a single-crystal microcomputer (3). It is connected to the connector for the GPS receiver and the serial input port of the computer. It is a transistor key circuit.

 13. Multiplexer (2) in 4 directions 8x1. Designed to expand the input port OEVM to interrogate 32 sensors. It is connected from the input side to the connector for sensors and from the output and control side - to the input / output port of the computer. The sensors are polled by sequentially sorting the addresses of the input terminals of the multiplexer and analyzing the state of the output of the multiplexer. It consists of 4 multiplexer microcircuits with 8 inputs and 1 output.

 Description and protocol of ACU operation.

 AKU-D is a device located in a plastic case and having connectors for connecting to a computer (RS-232-9), a power supply unit (12 V, central - "+"), power-on indication LEDs (green) and a communication line loop (yellow) and the reset button.

 AKU-O - a device located in a plastic case and having connectors for connecting sensors (32 sensors), GPS (RS-232-9 standard), power supply (12 V, center "+"), external speaker, power-on indication LEDs (green), armed mode (yellow), sensors (red), and buttons for arming and disarming the object.

 To control the devices, an alphanumeric code is used, with the prefix "#" and the suffix "Q".

AKU-D control commands (standard):
N - dial a phone number
Z - modem gain
Signs:
P - sign of pulse rate
T - sign of dial tone
A - a sign of the analysis of the line on the beep
W - sign of a 5 second delay
AKU-O control commands:
D - request for information about the object number, its status (X / Y) from sensors
G - request information from GPS
R - object programming
M - logical level of operation and masking of object sensors
Signs:
F - sign of telephone number
X - sign of security mode
Y - sign of disarming
Examples of team leaders AKU-D:
# PA3502517AQ - dial a phone number with analysis of a long beep before dialing and long beeps after dialing
"Busy" - AKU-D answer, if the number is busy (before the new set it is necessary to reset the line)
"Ready" - if the number is free
# ZQ - reset line
"End working" - reset confirmation
"Command line not correct" - if the command line is incorrect
Examples of the command line AKU-O:
# DQ - request for object number and sensor status
"N123XFFFFFFFFQ - object N 123, in the armed state (X), on all sensor inputs" logical 1 "
"N007Y00000001Q" - object N 007, disarmed (Y), at all sensor inputs, except for the 32nd "logical 0"
# GQ - request information from GPS
"$ GPRMC,. ..Q" is an RTCM SC-104 format string containing the number, time, coordinates, speed and direction of movement, altitude.

# R123XQ - program the object number "123" and put it in armed mode
# R007YQ - program the object number “007” and disarm it
# R777XFA1111111AFW2222222AFA3333333AFA4444444AQ
program the object number "777", put it in security mode and record four telephone numbers of the control room
"Connect Ok" - response on successful installation
"No Connect" - response with incorrect connection
"Repeat Connect" - an answer meaning a disconnection and its repetition
# M0000FFFF00000000 - to program the operation of the last 16 sensors to operate according to “logical 0” (when ACU-O is turned on, all sensor inputs are used to operate on “logical 0”)
When making a call to the control room, AKU-D issues the string "Ring".

 After establishing a connection between the control room and the object, it is necessary to transmit commands at least once every 16 seconds in order to avoid disconnection.

Description of AKU buttons:
Pressing a button on the front panel of the ACU-D will reset the line and initialize the device.

 Pressing the left button on the front panel of the AKU-O sets the device into armed mode.

 Pressing and holding the left button turns on the test mode of the sensors (pronouncing the object number and triggered sensors).

 Pressing the right button while pressing the left button disables the armed mode.

Security mode AKU-O:
After pressing the left button on the front panel of the AKU-O, the yellow LED starts flashing (for 1 minute). Stopping blinking means final setting to armed mode. Now, when any of the sensors is triggered, AKU-O dials into the control room using one of the four available phones in memory and reports a violation. If the communication line is in poor condition or the dispatch computer is turned off, messages about the state of the sensors are transmitted by voice.

 Compared with the known, the proposed TO system allows monitoring both stationary and mobile objects with advanced functionality. In the case of the stationary version, the computer’s implication is displayed on the computer screen with a spatial display of the triggered sensor or group of sensors with a record in the database. In the mobile version, a map of the area of a given scale with the current position of the mobile object and the characteristics of the triggered sensors with a record in the database is displayed on a computer screen. In addition, in the event of a malfunction of computer equipment, the technical advantage of the proposed system is the ability to transmit information by voice about the object number and the number (numbers) of the triggered sensor.

Claims (4)

 1. A television alarm system for stationary and mobile objects, containing a command and receiving device, communication channels for transmitting television alarm commands, the command device comprising a parameter sensor, an amplifier, a transmitter and a receiver of a first transceiver, and a receiving device - a receiver and a transmitter of a second transceiver, an information display device , characterized in that it additionally introduced into the command device a GSP receiver, a tone telephone, K parameter sensors, a multiplexer, the inputs of which connected to the outputs K of the parameter sensors, a single-crystal microcomputer, the first input of which is connected to the output of the multiplexer, a logic signal to interface signal converter designed to match the GSP receiver with the specified microcomputer, buses connected to random-access memory, read-only memory for storing speech and tone signals and a digital-to-analog converter, an additional microcomputer output port connected to the microcomputer with an address and data bus, a tonal frequency receiver, the output of which the second is connected to the second input of the microcomputer, an inductor call detector, the output of which is connected to the third input of the microcomputer, an electronic key block, the first input of which is connected to the tone telephone, the second input to the first output of the additional output port of the microcomputer, and the output to the inputs of the inductor call detector and a receiver of tonal frequencies, a node matching output analog signals with a telephone line, the first input of which is connected to the third output of the additional output port of the microcomputer, and the output is connected to the input of the electronic unit cell, a low-pass filter, the first output of which is connected to the second input of the analog output signal matching unit with the telephone line, the input is connected to the output of the digital-to-analog converter, and the second output is connected to the first input of the amplifier, the second input of the amplifier is connected to the second output of the additional output port of the microcomputer, a speaker connected to the amplifier output, the third output of the electronic key unit is connected to the first transceiver, the output of which is loaded on the communication channel for transmitting tele-signaling commands, are connected th with a receiving device, a computer, the input of which is connected to the output of the receiving device, and the output is connected to the information display device.  2. The system according to claim 1, characterized in that it contains N command devices.  3. The system according to claim 1, characterized in that the receiving device is configured to program the state of the parameter sensors.  4. The system according to claim 1, characterized in that as the communication channels for transmitting tele-signaling commands, telephone and cellular lines are used.

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