RU66077U1 - INTERFACE BLOCK - Google Patents

Abstract

The utility model relates to the field of computer technology and is intended for use as part of motor vehicles (ATS) with electronic engine control systems (ECMs) of Euro-4 level, and can be installed in promising long-haul trains and buses manufactured by MAZ RUE, Russian car factories and The Republic of Belarus.

The problem to which the claimed technical solution is directed is to create an interface unit for use as part of a telephone exchange and designed to ensure the interaction of electronic control units for Euro-4 engines with controls, sensors, indicating devices and other electronic systems of the telephone exchange.

The interface unit includes a microcontroller 1, CAN interface transceivers 2, 3, a power supervisor 4, buffer stages of inputs for connecting analog sensors 5 ₁ , 5 ₂ , a buffer stage with input for connecting a resistive sensor 6, a buffer stage with input for connecting a frequency signal 7, buffer stages of digital inputs for connecting the discrete sensors switched to ground August ₁ -8 _15, buffer stages of digital inputs for connecting the discrete sensors switched to supply 9 _1, 9 ₂ generator 10, EEPROM 11, an intellectual bound electronic keys switched outputs to ground January ₁₂ -12 _10; intelligent electronic switch with switching output to power 13, voltage converter for analog sensors 14, buffer stage 15, interface transceiver J 1708 16, protection circuit 17, intermediate voltage converter 18, line voltage regulator 19, process channel 20, I2C interface 21, input for connecting a discrete sensor with switching to power 22, SPI 23.

5 p.p. and., 4 z.p.f. and., ill. one.

Description

The utility model relates to the field of computer technology and is intended for use as a part of motor vehicles (ATS) with electronic engine control systems (ECM) of Euro-4 level, and can be installed in main road trains and buses manufactured by the Republican Unitary Enterprise (RUE) "MAZ" , car factories in Russia and the Republic of Belarus.

Known programmable logic controller (see US Pat. RF No. 2101757, IPC 6 G06F 9/00, publ. 01/10/1998, according to the application No. 95120422/09 of 01/01/1995, patent holder of the Research Institute for System Research of the Russian Academy of Sciences) containing microprocessor, local bus, dual-port static RAM, VME bus interface, ISA bus interface, ROM, electrically programmable read-only memory EEPROM, real-time clock, keyboard controller, system controller, universal programmable watchdog timer, RS232 and RS485 serial communication interfaces, per serial bus, submodule bus interface, buffer amplifiers of address and receivers / transmitters of data of submodule bus, buffer amplifiers and receivers / transmitters of RAM data, receivers / transmitters of address and receivers / transmitters of data of the VME bus interface, buffer amplifiers of address and receivers / transmitters of data of the bus interface ISA, buffer address amplifiers and peripheral bus data receivers / transmitters.

A sign of an analogue coinciding with the sign of the claimed utility model is EEPROM.

The reason that impedes the achievement of the claimed technical result is that this programmable logic controller is not designed to work as part of a telephone exchange, as it does not support the digital multiplex information channel (CMIK) CAN2.0, which does not allow for the interaction of the ECM with controls, sensors and car electronic systems.

Known programmable logic controller with a serial data interface in two standards (see RF application No. 2003115922/09 dated 05/27/2003, IPC 7 G06F 9/00, G06F 13/00, published on 11/27/2004, applicant Babanin VB), containing a set of buffer elements with a DC-to-bipolar converter. the microcontroller and the switch pins of the microcontroller having alternative functions of in-circuit programming, a recognition protocol recognition protocol based on an integrator with two integration time constants, the input of which is connected to the data line received by the microcontroller, and the output is connected to the switch control input and the RESET input of the microcontroller, and in programming mode the switch connects the outputs of the microcontroller to the signals of the serial data interface, and in the data exchange mode (autonomous) - to control and / or control devices.

The sign of the analogue, which coincides with the sign of the claimed utility model, is as follows: microcontroller.

The reason that impedes the achievement of the claimed technical result is that the programmable logic controller is not designed to work in automatic telephone exchanges, as it does not support the CMIC CAN2.0, which cannot ensure the interaction of the ESED with the controls, sensors and electronic systems of the car.

The closest analogue to the claimed utility model is the control signal generation unit (BFUS) (see utility model patent No. 53030 of the Russian Federation, IPC G06F 9/00 (2006.01), published on April 27, 2006, according to application No. 2006102082/22, patent holder Research Institute of Multiprocessor Computing Systems, Taganrog State Radio Engineering University (SRI MVS TRTU (RU)), containing a microcontroller connected to a multiplexed address / data bus, with a random access memory (RAM) unit, network controllers, bl with a temporary storage window for the address and data, which demultiplexes it and is connected to the RAM unit and network controller units by the address bus and along the control signal lines and the address / data forms the I / O module connection interface, and the error analysis unit is connected to the microcontroller via the microcontroller diagnostic lines, as well as diagnostic lines for additional BFUSs connected through a block of galvanic isolation of BFUS signals, and an error signal line of I / O modules, in addition, the microcontroller is connected to and terfeysu CAN №1 through block Isolation CAN №1 and №2 block the CAN transceiver for SSI interface via the Isolation Unit

RS-485 No. 1, receiver unit CLK RS-485 No. 1 via data transmission / reception lines of CAN interfaces No. 1, CAN No. 2 and SSI, respectively, and network controllers are connected via Ethernet No. 1 and Ethernet No. 2 galvanic isolation units via reception lines / transmission with the corresponding Ethernet interfaces, and the unit for temporary storage of the address and data on the address / data lines of the input / output modules, as well as on the control signal lines and on the diagnostic lines of the input / output modules forms an interface for connecting input / output modules.

Signs of an analogue that match those of the claimed utility model are as follows: microcontroller, CAN interface transceivers.

The reason that impedes the achievement of the claimed technical result is that the control signal generation unit is not designed to work as part of the automatic telephone exchange, as it does not have inputs for connecting discrete and analog sensors, outputs for controlling warning lights and direction indicators of the automatic telephone exchange instrument panel, which does not provide the interaction of the ECM with the controls, sensors and electronic systems of the car.

The problem to which the claimed technical solution is directed is to create an interface unit for use as part of a telephone exchange and designed to ensure the interaction of electronic control units for Euro-4 engines with controls, sensors, indicating devices and other electronic systems of the telephone exchange.

The technical result provided by the implementation of the proposed technical solution is as follows:

- monitoring the state of sensors and engine controls by means of buffer cascades of discrete inputs for connecting discrete sensors with mass switching, buffer cascades of discrete inputs for connecting discrete sensors with power switching, buffer cascades of frequency inputs, buffer cascades for connecting analog sensors and buffer cascades for connecting resistive sensors;

- control of devices and control lamps displaying engine operation parameters, in accordance with the information received from the engine control system, is carried out through smart electronic keys with ground switching and switching to power; Diagnostic information about the status of the connected loads (open circuit, short circuit) is transmitted from smart electronic keys with ground switching and switching to power to the microcontroller;

- data exchange with electronic systems according to the CMIC CAN 2.0 (in accordance with the SAE protocol J 1939) and J 1708.

The specified technical result in the implementation of the utility model is achieved by the fact that the power supply supervisor, a generator, EEPROM, k CAN transceivers, d smart electronic keys with switching outputs to the microcontroller are additionally introduced into the interface block containing a microcontroller connected to two CAN interface transceivers mass, m smart electronic keys with switching power outputs, n transceivers of the diagnostic interface J 1708, w diag transceivers of the remaining interface ISO 9141, intermediate voltage converter, p buffer cascades of discrete inputs for connecting discrete sensors with power switching, q buffer cascades of discrete inputs for connecting discrete sensors with ground switching, r buffer cascades of inputs for connecting frequency signals, s buffer cascades of inputs for connecting resistive sensors, t buffer cascades of inputs for connecting analog sensors, voltage converter for analog sensors, process channel l, wherein the analog sensor output voltage converter connected to the microcontroller through a buffer stage, an intermediate voltage transducer is connected to the input protection circuit, the output - to the linear regulator, one of the digital inputs switched to food connected to an intermediate voltage transducer.

The limiting values of k, d, m, n, w, p, q, r, s, t are in the following range: k = (1, 2, ... 4), d = (1, 2 ... 12) , m = (1, 2 ... 35), n = (0, 1), w = (0, 1), p = (1, 2 ... 40), q = (1, 2 ... 16), r = (1, 2 ... 4), s = (1, 2, 3), t = (1, 2, 3).

The microcontroller is connected to the EEPROM serial I2C interface.

The microcontroller, through intelligent electronic switches with ground switching, uses the SPI serial interface to control discrete outputs with ground switching.

The microcontroller, through intelligent electronic keys with mass-switched signals with pulse-width modulation, controls the outputs for connecting direction indicators

Since the interface unit is designed to operate as a part of various types of automatic telephone exchanges, the number of some buffer cascades and smart electronic keys of the interface module depends on the number of sensors, warning lamps, and pointer devices installed on this type of automatic telephone exchange.

One embodiment of the block diagram of the interface unit for the Deutz engine management system is shown in the drawing as an example, for the case when k = 2, t = 2, s = 1, r = 1, q = 15, p = 2, d = 10, m = 1, n = 1, w = 0.

The interface unit includes CAN transceivers CAN 2, 3 connected to the microcontroller 1, a power supervisor 4, buffer stages of inputs for connecting analog sensors 5 ₁ , 5 ₂ , a buffer stage with input for connecting a resistive sensor 6, a buffer stage with an input for connecting a frequency signal 7, buffer stages of discrete inputs for connecting discrete sensors with mass switching 8 ₁ -8 ₁₅ , buffer stages of discrete inputs for connecting discrete sensors with commutation to power 9 ₁ , 9 ₂ , generator 10, EEPROM 11, intelligent electronic keys with switching outputs to ground 12 ₁ -12 ₁₀ , intelligent electronic keys with switching outputs to power 13, and the output of the voltage converter of the analog sensors 14 is connected to the microcontroller 1 through the buffer stage 15, the microcontroller 1 is connected to the transceiver of the J interface 1708 16, the protection circuit 17 is connected to the input of the intermediate voltage converter 18, the output of the intermediate voltage converter 18 is connected to a linear voltage stabilizer 19, technological channel l 20 is connected to the microcontroller 1, and the microcontroller 1 is connected to the EEPROM 11 via the I2C 21 serial interface, the input for connecting a discrete sensor with switching to power supply 22 is connected to an intermediate voltage converter 18, the microcontroller 1 is connected to intelligent electronic keys with switching outputs to ground 12 ₁ -12 ₁₀ 23 SPI serial interface.

The supply voltage of the onboard network of the PBX (not shown) is supplied to the protection circuit 17, which is designed to protect against conducted interference of the onboard network of the PBX. From the output of the protection circuit 17, the supply voltage is supplied to the intermediate voltage converter 18, at the output of which a stabilized voltage of 7 V is formed. The intermediate voltage converter 18 is turned on by the signal of one of the digital inputs switched to power supply 22, as well as the signal from microcontroller 1.

The digital and analog circuits of the interface unit are powered by a voltage of 5 V, which is formed at the output of the linear stabilizer 19.

The voltage supply of the analog sensors (5 ± 0.25) V is generated at the output of the voltage converter of the analog sensors 14. This voltage converter of the analog sensors 14 has a short circuit protection

output to ground and to the positive power supply bus of the on-board PBX network (not shown in the drawing). The control of the inclusion of the voltage converter of the analog sensors 14 is carried out by a signal from the microcontroller 1. The output of the voltage converter of the analog sensors 14 is connected through the buffer stage 15 to the microcontroller 1.

Power Supervisor 4 generates a reset signal for microcontroller 1.

The generator 10 generates a clock frequency for the microcontroller 1.

Buffer stages of discrete inputs for connecting discrete sensors with mass switching 8 ₁ -8 ₁₅ and buffer stages of discrete inputs for connecting discrete sensors with commutation to power 9 ₁ , 9 ₂ are designed to convert logical levels of input signals from sensors installed on the telephone exchange (on not shown), to the TTL logic levels for connection to microcontroller 1. A speed signal, for example, from a PBX tachograph (not shown in the drawing) is fed to the input of microcontroller 1 through a buffer stage of frequency input 7, etc. designed to convert logical levels of speed signal (0-8 V) into TTL levels.

The signals of the analog sensors and the signal of the resistance exchange sensor (not shown) are input to the analog-to-digital converter built into the microcontroller 1 (not shown) through the buffer stages for connecting the analog sensors 5 ₁ , 5 ₂ and the buffer stage for connecting the resistive sensor 6.

Intelligent electronic keys with mass switching 12 ₁ -12 ₁₀ are based on TLE6232GP smart electronic key circuits. Control of discrete outputs with switching to ground is carried out by microcontroller 1 through intelligent electronic keys with switching to ground 12 ₁ -12 ₁₀ via serial interface SPI 23 (see drawing). The outputs for connecting the direction indicators are controlled by the microcontroller 1 through smart electronic keys with switching to mass 12 ₉ -12 ₁₀ signals with pulse-width modulation (see drawing). The discrete output with switching to power supply is controlled by microcontroller 1 through an intelligent electronic key with switching to power 13. From diagnostic electronic keys with switching to mass 12 ₁ -12 ₁₀ and from an intelligent electronic key with switching to power 13, diagnostic status information is transmitted to microcontroller 1 connected loads (open circuit, short circuit).

Configuration information and event history are saved in EEPROM 11. Data exchange between microcontroller 1 and EEPROM 11 is carried out via the I2C 21 serial interface.

The physical layers of digital serial interfaces (CMIC) CAN 1, CAN 2 are implemented on the transceivers of the CAN 2, 3 interface. The physical layer CMIC J 1708 is implemented on the transceiver of the interface J 1708 16.

Downloading software to the non-volatile memory of the microcontroller 1 is carried out through a serial technological channel 20.

The operation of the interface unit as part of a telephone exchange with a Deutz engine of Euro-4 level showed the reliable operation of the interface unit in various operating modes: control of engine control devices, engine start (power supply to the electronic engine block, activation of the starter relay), engine operation under load (transmitting information to the engine on the position of the accelerator pedal), engine control in cruise control mode (transmission of torque correction commands to the electronic engine block), engine shutdown (transmission com ands to turn off the engine, turn off the power of the electronic engine block). At the same time, the interface unit is designed taking into account the requirements of GOST R 50905-96 “Motor vehicles. Electronic equipment. General technical requirements. " GOST R 52230-2004 “Electrical equipment for tractors. General technical conditions ”and ensures reliable operation in the indicated modes under operating conditions that meet the requirements for automatic telephone exchanges.

Thus, it can be seen from the considered material that the claimed utility model is new, industrially applicable and solves the stated technical problem with the claimed technical result.

Claims (5)

1. An interface unit containing a microcontroller connected to two CAN interface transceivers, characterized in that it additionally includes a power supervisor, a generator, EEPROM, k CAN interface transceivers, d smart electronic switches with mass-output switching, connected to the microcontroller, m intelligent electronic keys with switching outputs for power supply, n transceivers of the diagnostic interface J 1708, w transceivers of the diagnostic interface ISO 9141, intermediate converter l voltages, p buffer cascades of discrete inputs for connecting discrete sensors with power switching, q buffer cascades of discrete inputs for connecting discrete sensors with mass switching, r buffer cascades of inputs for connecting frequency signals, s buffer cascades of inputs for connecting resistive sensors, t buffer cascades of inputs for connecting analog sensors, converter for supply voltage of analog sensors, technological channel, and the output of converter for supply voltage of analog The output sensors are connected to the microcontroller through a buffer stage, the input of the intermediate voltage converter is connected to the protection circuit, the output is connected to a linear stabilizer, one of the discrete inputs with power switching is connected to the intermediate voltage converter. 2. The interface unit according to claim 1, characterized in that the limiting values of k, d, m, n, w, p, q, r, s, t are in the following range: k = (1, 2, ... 4 ), d = (1, 2 ... 12), m = (1, 2 ... 35), n = (0, 1), w = (0, 1), p = (1, 2 .. .40), q = (1, 2 ... 16), r = (1, 2 ... 4), s = (1, 2, 3), t = (1, 2, 3). 3. The interface unit according to claim 1, characterized in that the microcontroller is connected to the EEPROM by a serial interface 12C. 4. The interface unit according to claim 1, characterized in that the microcontroller, through intelligent electronic keys with commutation to ground, controls the discrete outputs to ground via a serial interface SPI. 5. The interface unit according to claim 1, characterized in that. that the microcontroller, through intelligent electronic keys switched to ground by signals with pulse-width modulation, controls the outputs for connecting arrow pointers.