WO2020206844A1 - General smart control device for locomotive air conditioner - Google Patents

Abstract

A general smart control device for a locomotive air conditioner, comprising one main processer board, two case power boards (106) isolated from each other, a plurality of digital quantity input boards (102), digital quantity output boards (103), analog quantity input boards (104), analog quantity output boards (105), and a pressure wave protection board (107). The case power boards (106) supply power to the boards in a case; a general board interface is provided; each smart board is responsible for collecting and outputting an external signal; the main processer board is responsible for processing a logical operation and controlling peripherals and the smart boards to perform corresponding operations. The general board interface comprises an encoding strip, and an interface corresponding to the encoding strip can be selected; in the case that sensors outside the air conditioner are increased or a switching value is increased, the air conditioner is not needed to be redesigned.

Description

General intelligent control device for locomotive air conditioner Technical field

The invention relates to the field of locomotive air conditioning control, in particular to a general intelligent control device for locomotive air conditioning.

Background technique

The locomotive air conditioning controller uses certain control logic to control the working status of air conditioning units, heaters, exhaust fans and other functional components, so as to achieve the purpose of controlling the temperature and humidity comfort of the cabin. It is an important functional component of the air conditioning system. The current locomotive air-conditioning controllers are basically customized for air-conditioning units, and they are not universal.

Summary of the invention

The present invention provides a universal intelligent control device for locomotive air conditioners to overcome the above technical problems.

The universal intelligent control device for locomotive air conditioner of the present invention includes:

A controller, a number of digital input boards, a number of digital output boards, a number of analog input boards, a number of analog output boards, and a chassis power board through the board interface, the universal board The card interface has an encoding bar, and the interface corresponding to the encoding bar can be selected;

The chassis power board is used to convert the converted voltage to the digital input board, the digital output board, the analog input board, the analog output board, and the pressure wave Protection board power supply;

The digital output board receives the on or off instruction of the controller via the CAN bus, and sends the on or off instruction to the relay;

The analog input board is used to collect analog data from a locomotive air-conditioning temperature sensor, and send the analog data to the controller after preprocessing;

The digital input board is used to collect the on-off signal of the state of the locomotive air conditioner fan, and send it to the controller after preprocessing;

The analog output board is used to receive the analog control signal sent by the controller, and send the analog control signal to the air conditioning fan after D/A conversion and drive isolation circuit processing;

The controller receives the air-conditioning temperature sensor analog data collected by the analog input board and the air-conditioning fan status switch signal collected by the digital input board, and sends the switch signal to the air conditioner according to the analog data and switch signal. The analog output board sends the air conditioner fan to send an analog control signal, and the digital output board sends a relay control instruction.

further,

The digital output board is also used to self-check the working status of the internal relay and send it to the controller.

Further, it also includes:

The external power supply board is used to convert 110V power into 24V voltage, and the converted voltage supplies power for the temperature sensor and the display unit.

Further, it also includes:

The pressure wave protection board is used to control the damper according to the data collected from the pressure sensor.

Further, the network interface of the controller includes an Ethernet network interface or an MVB network interface.

Further, the communication interface of the controller includes an RS232 interface for communicating with a display screen, an RS485 interface for communicating with a fan, and a CAN interface for communicating with a floor heater of a locomotive compartment.

Further, the controller is also used to detect whether the CANID of the digital input board, the digital output board, the analog input board, and the analog output board and the CANID of the controller match.

Further, the controller is also used to send a self-check instruction to the digital input, digital output, and analog input boards, and the digital input, digital output, and analog input boards perform self-checks.

The controller of the present invention includes a network interface and a communication interface. The controller interfaces the collected data of the digital input board and the analog input board, and performs control on the refrigeration system and heating system of the air conditioner according to the collected data. For control, the universal board interface includes an encoding bar, and the interface corresponding to the encoding bar can be selected when the sensor outside the air conditioner increases or the switch quantity increases, without the need to redesign the heavy air conditioner. The compatibility of the air conditioner controller is realized.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings used in the description of the embodiments or the prior art. Obviously, the drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

Figure 1 is a schematic diagram of the structure of a general intelligent controller for locomotive air conditioners according to the present invention;

Figure 2 is a schematic diagram of the code bars on each smart board of the present invention.

detailed description

In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Fig. 1 is a schematic structural diagram of a general intelligent controller for a locomotive air conditioner of the present invention. As shown in Fig. 1, the general intelligent controller for a locomotive air conditioner of this embodiment may include:

Controller 101, with several digital input boards 102, several digital output boards 103, several analog input boards 104, several analog output boards 105, and chassis power boards through board interface 106 and a universal board interface, the universal board interface has a coding bar, and the interface corresponding to the coding bar can be selected;

The chassis power board is used to convert the converted voltage to the digital input board, the digital output board, the analog input board, the analog output board, and the pressure wave Protection board power supply;

Specifically, the function of the chassis power supply board is to convert the external 110V power supply into 5V. The converted 5V voltage is used to power other boards in the smart controller. Each smart board then converts 5V into its own The required power supply, thereby reducing the failure rate of the power supply.

The digital output board receives the on or off instruction of the controller through the CAN bus, and sends the on or off instruction to the relay. The digital output board is also used to self-check the working status of the internal relay and send To the controller.

Specifically, the digital output board receives instructions from the controller through the CAN bus, and sends an on or off instruction to the external relay, and the control terminal of the internal relay on the digital output board of the external 8-way relay is controlled with The input terminal of the self-check circuit on the digital output board is connected, and the output terminal of the self-check circuit is connected to the controller. The controller detects the working state of the internal relay through the self-check signal transmitted by the self-check circuit. For example: Is the output of the relay correct?

The digital output board integrates 8 relay outputs to control the closing or opening of the external 8 relays. Corresponding to external relays, the control terminal of each relay in the digital output board has a feedback function. When the board card controls the relay contact switch, the main processing chip STM32F103VBT6 can also receive the feedback signal. The chip can know whether the corresponding board is working normally by comparing the feedback signal with the sent control signal, and immediately send it to the main processor when an abnormality is found. The main processor makes corresponding warnings to ensure the reliability of the system. Each output has an indicator light display function. The digital quantity of these outputs is the switch quantity of the air conditioning system that the controller needs to control.

The analog input board is used to collect analog data from a locomotive air-conditioning temperature sensor, and send the analog data to the controller after preprocessing;

Specifically, the preprocessing performed by the modulus input board on the collected analog data of the locomotive air conditioner temperature sensor may include: amplification, filtering, A/D conversion, drive circuit, optocoupler isolation, and analog input board It can collect three types of signals: 0-20mA, 0-5V, and NTC. Each board has 8 analog inputs. Each channel has a 0-point self-check function, and the final data is composed of the difference between the normally collected data and the 0-point data. By subtracting the error of 0 point, the accuracy of the data collected by each analog quantity is guaranteed. Among them, the NTC resistance type collects the temperature of the relevant position of the car, and the 0-20mA, 0-5V channel is connected with the sensor of the air conditioning system.

The digital input board is used to collect the on-off signal of the state of the locomotive air conditioner fan, and send it to the controller after preprocessing;

Specifically, the preprocessing of this embodiment includes voltage stabilization and optocoupler isolation. The digital input board converts 24 externally input 110VDC/0V switching values into 3.3V/0V signals that can be recognized by the STM32F103 chip after isolation. Each input has an indicator light display function, and the digital quantity is the switch quantity of the air conditioning system required by the controller.

The analog output board is used to receive the analog control signal sent by the controller, and send the analog control signal to the air conditioning fan after D/A conversion and drive isolation circuit processing;

Specifically, the analog output board integrates 8 0-10V analog output functions. Among them, the analog quantity acquisition chip adopts 14-bit high-precision DA conversion chip. This board provides analog control for the air conditioning system.

The controller receives the air-conditioning temperature sensor analog data collected by the analog input board and the air-conditioning fan status switch signal collected by the digital input board, and sends the switch signal to the air conditioner according to the analog data and switch signal. The analog output board sends the air conditioner fan to send an analog control signal, and the digital output board sends a relay control instruction.

Specifically, the internal bus of the air conditioner controller of this embodiment adopts the CAN2.0B mode, and the baud rate adopts 500 kbps. The smart board in the air conditioner controller has the function of automatically identifying the ID number. The slot ID of each board is fixed, and the smart board will communicate with the main processor after identifying the slot ID. The boards in the controller are equipped with error prevention strips. The codes of the coding strips of the same kind of boards are the same, and the same kind of boards can be exchanged at will. Different boards cannot switch positions due to the function of preventing misplugging. The schematic diagram of the code bar on the board is shown in Figure 2. The corresponding code is performed by removing the code number on the code bar and plugging the code at the fixed end. The CAN ID of the main processor in the controller is 0, and the IDs of other boards start from 1 to increase sequentially. The CAN ID of this controller consists of 6 pins, so it can be expanded to 64 CAN IDs. The air conditioner controller adopts the form of an integrated smart board, including a main processor board for processing complex logic operations and controlling peripherals and smart boards; it has 2 mutually isolated power boards, of which the chassis power board It supplies power to the controller chassis, and the external power board supplies power to external sensors and other devices. The chassis integrates several digital input boards, digital output boards, analog input boards, analog output boards, and pressure wave protection boards. The chassis of the controller reserves a certain number of slots for each board, and the number of each board is increased or decreased according to the needs of the system.

Further, it also includes:

The external power supply board is used to convert 110V power into 24V voltage, and the converted voltage supplies power for the temperature sensor and the display unit.

Specifically, the external power supply board of this embodiment and the chassis power supply board are isolated from each other. Reduce interference between each other.

Further, it also includes:

The pressure wave protection board is used to control the damper according to the data collected from the pressure sensor.

Specifically, the pressure wave protection board controls the damper by collecting data from the pressure sensor. Which can provide 24V power supply for the pressure sensor.

Further, the network interface of the controller includes an Ethernet network interface or an MVB network interface.

Further, the communication interface of the controller includes an RS232 interface for communicating with a display screen, an RS485 interface for communicating with a fan, and a CAN interface for communicating with a floor heater of a locomotive compartment.

Specifically, the main processor unit has external 2 Ethernet, 1 MVB, 1 RS232, 1 RS485, and 1 CAN interface. The controller can select Ethernet network or MVB network according to the network type of the locomotive. RS232 is used to communicate with the display screen, RS485 is used to communicate with the fan, and CAN is used to communicate with the floor heater of the locomotive compartment. The data collected by the CPU through the network, peripherals, and various smart boards, after logical calculation, controls the refrigeration system and the heating system accordingly.

Further, the controller is also used to detect whether the CANID of the digital input board, the digital output board, the analog input board, and the analog output board and the CANID of the controller match.

Specifically, the CAN communication mode inside the controller is a "master-slave" mode. The main processor sends commands and other smart boards respond. The slave device receives the command sent by the master device and responds and sends back data after the board address matches (mandatory corresponding time <1ms). If the smart plug-in has output control and the command is not received within 200ms, the output is reset to the default state. The main processor issues instructions, and each smart plug-in board receives the instructions on the CAN bus and responds accordingly. When the CAN ID matches its own ID, the specific function of the command is judged, and the corresponding action is taken to reply to the response command. The communication modes between the digital input board, digital output board, analog input board, analog output board, chassis power board and the controller in this embodiment are all completed by CAN bus.

Further, the controller is also used to send a self-check instruction to the digital input, digital output, and analog input boards, and the digital input, digital output, and analog input boards perform self-checks.

Specifically, the controller boards all have a self-check function. After power-on, the main processor sends instructions through the CAN bus to let the smart board perform self-check. The smart board checks its own peripheral circuits, and the check results Send to the main processor, the main processor receives the self-check result of the smart board, performs normal control/locking of the smart board, and other operations, and sends the location of the locked smart board to the staff through the network Replace it. Then, the main processor performs normal logic operations, communicates with the external network, and controls peripherals accordingly.

The invention discloses a general intelligent control device for locomotive air conditioners, which includes a main processing board, two mutually isolated power supply boards, several digital input boards, digital output boards, analog input boards, and analog input boards. Quantity output board, pressure wave protection board. Among them, the chassis power board provides power for each board in the chassis, each smart board is responsible for collecting external signals and external output, and the main processor board is responsible for logic operations to control peripherals and each smart board for corresponding operations.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: It is still possible to modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention range.

Claims (8)

1. A general intelligent control device for locomotive air conditioners, which is characterized by comprising:

   A controller, a number of digital input boards, a number of digital output boards, a number of analog input boards, a number of analog output boards, and a chassis power board through the board interface, the universal board The card interface has an encoding bar, and the interface corresponding to the encoding bar can be selected;

   The chassis power board is used to convert the converted voltage to the digital input board, the digital output board, the analog input board, the analog output board, and the pressure wave Protection board power supply;

   The digital output board receives the on or off instruction of the controller via the CAN bus, and sends the on or off instruction to the relay;

   The analog input board is used to collect analog data from a locomotive air-conditioning temperature sensor, and send the analog data to the controller after preprocessing;

   The digital input board is used to collect the on-off signal of the state of the locomotive air conditioner fan, and send it to the controller after preprocessing;

   The analog output board is used to receive the analog control signal sent by the controller, and send the analog control signal to the air conditioning fan after D/A conversion and drive isolation circuit processing;

   The controller receives the air-conditioning temperature sensor analog data collected by the analog input board and the air-conditioning fan status switch signal collected by the digital input board, and sends the switch signal to the air conditioner according to the analog data and switch signal. The analog output board sends the air conditioner fan to send an analog control signal, and the digital output board sends a relay control instruction.
2. The universal intelligent control device for locomotive air conditioners according to claim 1, wherein the digital output board is also used to self-check the working status of the internal relay and send it to the controller.
3. The universal intelligent control device for locomotive air conditioner according to claim 1, characterized in that it further comprises:

   The external power supply board is used to convert 110V power into 24V voltage, and the converted voltage supplies power for the temperature sensor and the display unit.
4. The universal intelligent control device for locomotive air conditioners according to claim 1 or 2, characterized in that it further comprises:

   The pressure wave protection board is used to control the damper according to the data collected from the pressure sensor.
5. The universal intelligent control device for locomotive air conditioners according to claim 1, wherein the network interface of the controller comprises an Ethernet network interface or an MVB network interface.
6. The general intelligent control device for locomotive air conditioners according to claim 1, wherein the communication interface of the controller includes an RS232 interface for communicating with a display screen, an RS485 interface for communicating with a fan, and an RS485 interface for communicating with a locomotive. CAN interface for communication with the floor heater of the carriage.
7. The general intelligent control device for locomotive air conditioners according to claim 1, wherein the controller is also used to detect the digital input board, the digital output board, the analog input board, Whether the CANID of the analog output board matches the CANID of the controller.
8. The general intelligent control device for locomotive air conditioners according to claim 1, wherein the controller is also used to send a self-check instruction to the digital input, digital output, and analog input boards, and the digital input Input, digital output, and analog input boards perform self-checking.

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