Intrinsic safety type industrial personal computer

Abstract

The utility model discloses an intrinsically safe industrial personal computer, comprising a display screen; the display screen is connected with the main control unit through a display screen interface, and the main control unit provides at least one CAN communication interface, at least one RS485 communication interface, a multi-path controllable switching value output interface, a multi-path switching value input interface, an Ethernet interface and at least one USB interface; the memory module is connected with the main control unit; the Ethernet interface is connected with the main control unit through the Ethernet driving module; the EMMC is connected with the main control unit; the intrinsic safety type power supply supplies power to a peripheral circuit of the industrial personal computer; and the multi-path power supply management module is used for outputting multi-path power supplies. According to the utility model, various interfaces can be integrated, the use is convenient and flexible, an operating system can be carried, various system resources can be integrated, and the requirements of loading and storing different programs and data can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converter control, in particular to an intrinsically safe industrial control computer. Background Art

[0002] The control boxes of traditional mine-used frequency converters are mostly flameproof and intrinsically safe or flameproof, which have the disadvantages of bulky size, complex structure, high power consumption, etc. They use control panels and configuration screens, and the control core uses PLC, which is complex and costly.

[0003] The development of underground coal mine design technology has placed increasingly higher demands on the functionality of control equipment, and it is necessary to improve the processing power of the main control unit to achieve programmable control and thus realize more complex application requirements. Utility Model Content

[0004] The purpose of the utility model is to provide an intrinsically safe industrial computer with a simple hardware structure and convenient integrated design; it integrates multiple interfaces and matches multiple application occasions; it can carry an operating system and integrate multiple system resources to meet the needs of loading and storing different programs and data.

[0005] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0006] The present application relates to an intrinsically safe industrial computer, comprising:

[0007] Display screen;

[0008] A main control unit, wherein the display screen is connected to the main control unit via a display screen interface, and the main control unit provides at least one CAN communication interface, at least one RS485 communication interface, a multi-channel controllable switch output interface, a multi-channel switch input interface, an Ethernet interface, and at least one USB interface;

[0009] A memory module connected to the main control unit;

[0010] An Ethernet driver module, the Ethernet interface is connected to the main control unit through the Ethernet driver module;

[0011] EMMC, connected to the main control unit;

[0012] An intrinsically safe power supply, which supplies power to the peripheral circuits of the industrial computer;

[0013] A multi-channel power management module is used to output multi-channel power to power the memory module and its driver, the main control unit, the Ethernet driver module and EMMC, and the peripherals of the main control unit.

[0014] In the present application, the switch quantity output by the multi-channel controllable switch quantity output interface is used to control the semiconductor relay.

[0015] In the present application, the main control unit also provides at least one Console interface and at least one USB-OTG interface.

[0016] In this application, the intrinsically safe industrial computer also includes:

[0017] The TF card slot is connected to the main control unit and is used to insert a TF card.

[0018] In this application, the intrinsically safe industrial computer also includes:

[0019] An emergency stop button connected to the main control unit, the start / stop signal of the emergency stop button being received by one of the multiple switch input interfaces; and / or

[0020] An independent knob is used to adjust the forward / reverse direction of the frequency converter, and one of the multi-channel switch input interfaces receives the forward / reverse rotation signal of the frequency converter.

[0021] In this application, the intrinsically safe industrial computer also includes:

[0022] Multiple independent buttons are used for start and stop control of different external set speeds, and each start and stop signal is received by a multi-channel switch input interface.

[0023] In this application, the intrinsically safe power supply is used to convert and generate a 3.3V DC power supply, and includes:

[0024] A first power conversion unit, the power supply is input to the input terminal of the first power conversion unit through a double layer of over-current and over-voltage protection;

[0025] The second power conversion unit, the voltage output by the first power conversion unit is input to the input end of the second power conversion unit through double-layer over-current and over-voltage protection, and the voltage output by the second power conversion unit is output as a 3.3V DC power supply through double-layer over-current and over-voltage protection.

[0026] In this application, the intrinsically safe industrial computer also includes:

[0027] The dip switch is used at least for system reset or system startup item configuration.

[0028] In this application, the main control unit is based on an ARM chip.

[0029] The intrinsically safe industrial computer provided by the utility model has the following advantages and beneficial effects:

[0030] (1) The display screen and main control unit are integrated through the display screen interface, which reduces the complexity of the system and supports unified programming of application programs and graphical interfaces;

[0031] (2) By integrating the main control unit, memory module, Ethernet driver module and EMMC, the main control unit provides CAN communication interface, RS485 communication interface, controllable switch output interface, switch input interface, Ethernet interface and at least one USB interface, integrating multiple interfaces to match multiple application scenarios, and being able to carry an operating system and integrate multiple system resources to meet the requirements of different programs and data loading and storage;

[0032] (3) Use intrinsically safe power supply to reduce energy consumption and improve system stability.

[0033] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, a brief introduction will be given below to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 It is a structural diagram of an embodiment of an intrinsically safe industrial control computer proposed by the utility model;

[0036] Figure 2 It is a circuit diagram of an intrinsically safe power supply in an intrinsically safe industrial computer embodiment proposed by the utility model;

[0037] Figure 3 The utility model discloses a circuit diagram of a multi-channel power management module in an embodiment of an intrinsically safe industrial computer.

[0038] Reference numerals:

[0039] 10. Main control unit; 11. Controllable switch output interface; 12. Switch input interface; 13. CAN communication interface; 14. Ethernet interface; 15. RS485 communication interface; 20. Display screen; 30. Ethernet driver module; 40. Memory module; 50. USB interface; 60. EMMC; 70. TF card slot; 80. Console interface. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] The present application relates to an intrinsically safe industrial computer, which is an intrinsically safe programmable control system hardware that can be equipped with an operating system to meet more complex application requirements of a frequency converter. It is used for on-site control and programming applications of a frequency converter and has comprehensive control capabilities for the frequency converter.

[0043] See also Figures 1 to 3 The industrial computer of this application mainly involves two parts: a display screen 20 and a host circuit board.

[0044] The host circuit board comprises a main control unit 10, a power management part, a memory module 40, an EMMC 60 and an Ethernet driver module 30, wherein the power management part comprises an intrinsically safe power supply and a multi-channel power management module.

[0045] The main control unit 10 is based on an ARM main control chip and has a variety of on-chip peripherals. The intrinsically safe power supply provides 3.3VDC power to the peripheral circuits of the main control unit 10 .

[0046] The display screen 20 is connected to the main control unit 10 via a display screen interface and can be used to display the main control system interface. The working power source is the 5VDC power source of the host circuit board.

[0047] The display screen 20 and the host circuit board are integrated and unified, which reduces the complexity of the system, improves the data processing capability, reduces the production cost, and supports the unified programming of the application program and the graphical interface.

[0048] See also Figure 1The main control unit 10 provides at least one CAN communication interface 13, at least one RS485 communication interface 15, a multi-channel controllable switch output interface 11, a multi-channel switch input interface 12, an Ethernet interface 14 and at least one USB interface 50.

[0049] The CAN communication interface 13 is connected to the frequency converter communication control. In the present application, two CAN communication interfaces are provided, which have 2.5Kv electrical insulation capability.

[0050] The CAN communication interface 13 can be configured with a communication bit rate and a station number.

[0051] The RS485 communication interface 15 can be connected to a host computer to achieve data uploading and remote control with the host computer.

[0052] In the present application, two RS485 communication interfaces 15 are provided, which also have 2.5Kv electrical insulation capability.

[0053] The multi-channel controllable switch quantity output interface 11 is used to output switch quantity signals. In the present application, four-channel controllable switch quantity output interfaces 11 are provided, and the execution components use semiconductor relays with electrical isolation capability.

[0054] The multi-channel switch quantity input interface 12 is used to receive switch quantity signals. In the present application, eight controllable switch quantity input interfaces 12 are provided.

[0055] In the present application, the intrinsically safe industrial computer has an emergency stop button (not shown), and / or an independent knob (not shown), and / or multiple independent buttons (not shown).

[0056] When the emergency stop button is pressed, the industrial computer receives the emergency stop signal, the system performs an emergency stop action, and the frequency converter automatically stops.

[0057] In the present application, one of the switch input interfaces 12 receives an external emergency stop signal, and the emergency stop button corresponds to the external emergency stop signal. When the emergency stop button is started (i.e., pressed), a switch external emergency stop signal is generated and received by the switch input interface 12.

[0058] The industrial computer also includes an independent knob, which is used to adjust the forward and reverse directions of the frequency converter.

[0059] The forward / reverse rotation signal can also be received by a switch input interface 12 .

[0060] In the present application, a plurality of independent buttons are respectively used for start and stop control of different externally set speeds, and each start and stop signal is received by the multi-channel switch input interface 12 .

[0061] It can be set as three independent buttons for respectively setting three different external speed setting values ​​(recorded as the first setting value, the second setting value and the third setting value).

[0062] The frequency converter can be selected to run at any speed setting value, wherein the range of the first setting value, the second setting value and the third setting value are all 0rpm-1500rpm.

[0063] The multi-channel switch input interface 12 receives start and stop signals of independent buttons corresponding to different external speed setting values.

[0064] The independent buttons may also include a stop button, which is used to control the frequency converter to stop.

[0065] In the present application, the Ethernet interface 14 selects the NET interface, which is a Gigabit Ethernet interface, which can achieve larger-scale data exchange and throughput, thereby improving the data exchange speed.

[0066] The Ethernet driver module 30 uses a PHY driver chip, which is a Gigabit Ethernet driver chip, to achieve 10M / 100M / 1000M adaptive matching.

[0067] At least one USB interface 50 is used to connect to an external device. In the present application, four USB interfaces 50 are provided which are extended through a USB hub and are generally used to connect to a USB flash drive (for storing running process data or collecting data, etc.), connect an external mouse / keyboard, etc.

[0068] The industrial computer integrates multiple interfaces, can easily match a variety of application scenarios, and can also load and run operating systems (for example, Mine Hong, Linux, etc.), and can easily integrate and reference various resources.

[0069] The industrial computer is also provided with a memory module 40 and an EMMC (Embedded Multi Media Card) 60 .

[0070] The memory module 40 is a memory chip, which is generally 1 GB to 2 GB; the EMMC 60 is a flash memory chip, which is generally used for operating system storage, etc., and is 8 GB to 32 GB.

[0071] As described above, by providing the USB interface 50 , the memory module 40 and the EMMC 60 , system storage of operating data, system storage of application parameters, removable storage of application programs, etc. are implemented.

[0072] See also Figure 2 , which shows the circuit diagram of an intrinsically safe power supply.

[0073] The intrinsically safe power supply provides 3.3VDC power to the peripheral circuits of the main control unit 10 and provides 5VDC power to the host circuit board.

[0074] The intrinsically safe power supply includes a first power conversion unit U2, a first overcurrent and overvoltage protection unit (unmarked), a second overcurrent and overvoltage protection unit (unmarked), a second power conversion unit U3 and a third overcurrent and overvoltage protection unit (unmarked).

[0075] The power supply (eg +12V) is input to the first power conversion unit U2 through the first over-current and over-voltage protection unit, and the first power conversion unit U2 outputs, for example, 5VDC power.

[0076] The 5VDC power source is input to the second power conversion unit U3 through the second over-current and over-voltage protection unit. The output of the second power conversion unit U3 is, for example, 3.3VDC power source.

[0077] The first overcurrent and overpressure protection unit and the second filtering overpressure protection unit are both double-layer overcurrent and overpressure protection units, and the two have the same structure.

[0078] The structure of one of the overcurrent and overvoltage protection units is taken as an example for explanation.

[0079] The first overcurrent and overvoltage protection unit includes a first protection branch and a second protection branch connected in parallel.

[0080] The structures of the first protection branch and the second protection branch are the same, and the structure of the first protection branch is taken as an example for description.

[0081] See also Figure 2 The first protection branch includes a first controllable switch element Q1 and a first voltage stabilizing circuit connected in parallel, wherein the first voltage stabilizing circuit includes a first resistor R26 and a first voltage stabilizing tube D14.

[0082] One end of the first controllable switch element Q1 is connected to the cathode of the first voltage regulator D14, one end of the first resistor R26 is connected to the other end of the first controllable switch element Q1, and the other end of the first resistor R26 is respectively connected to the control end of the first controllable switch element Q1 and the anode of the first voltage regulator D14.

[0083] The first controllable switch element Q1 may be a thyristor.

[0084] The 3.3VDC power supply also passes through the third over-current and over-voltage protection unit for double-layer over-current and over-voltage protection.

[0085] The first overcurrent and overvoltage protection unit is used to perform overcurrent and overvoltage protection on the power supply 12VDC power supply; the second overcurrent and overvoltage protection unit is used to perform overcurrent and overvoltage protection on the output power supply 5VDC power supply; the third overcurrent and overvoltage protection unit is used to perform overcurrent and overvoltage protection on the output power supply 3.3VDC power supply.

[0086] As mentioned above, the power supply 3.3VDC has multiple dual configuration protection functions and meets the intrinsic safety requirements.

[0087] For power supply of intrinsically safe systems, lower energy consumption can bring better system stability. Generally speaking, the maximum output power of intrinsically safe power supply is about 20 watts.

[0088] In the present application, the industrial computer is also provided with a DIP switch (not shown), which is used for system reset and system startup item configuration, etc.

[0089] In the present application, the industrial computer is also provided with a Console interface 80, which is in the form of a Type-C interface and is used for command line operations, etc.

[0090] In the present application, the industrial computer is also provided with a USB-OTG interface (not shown) for system loading, etc.

[0091] In the present application, the industrial computer is also provided with a TF card slot 70 for inserting a TF card, which is generally used for storing application programs, so that on-site application program upgrades can be easily implemented.

[0092] In this application, the core power supply part of the main control machine adopts a multi-way power management module.

[0093] In this application, see Figure 3 , using a four-way power management chip model EA3059QDRD to generate four power supplies.

[0094] The four outputs of this power management chip are generated through double-layer over-current and over-voltage protection, namely VDD_DDR, VDD_CORE, VCC3V3 and VDD.

[0095] VDD_DDR supplies power to the memory chip and its driver, with a typical voltage of 1.3V.

[0096] VDD_CORE is the power supply for the ARM chip core, with a typical voltage of 1.2V.

[0097] VCC3V3 is used to power the PHY driver chip and EMMC 60, with a typical voltage of 3.3V.

[0098] VDD is used to power the main ARM chip peripherals, and its typical voltage is 3.3V.

[0099] The industrial computer provided in the present application has a simple hardware layout, clear functions, and is easy to maintain; the host circuit board and the display screen 20 are integrated and unified, which reduces the complexity of the system and improves the data processing capability; the industrial computer is equipped with an operating system and can integrate a variety of system resources; it integrates a variety of interfaces and can flexibly match a variety of application scenarios, especially Gigabit Ethernet can realize rapid exchange of data with the outside world; it uses an intrinsically safe power supply to reduce energy consumption and improve system stability.

[0100] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. An intrinsically safe industrial computer, characterized in that: include: Display screen; A main control unit, wherein the display screen is connected to the main control unit via a display screen interface, and the main control unit provides at least one CAN communication interface, at least one RS485 communication interface, a multi-channel controllable switch output interface, a multi-channel switch input interface, an Ethernet interface, and at least one USB interface; A memory module connected to the main control unit; An Ethernet driver module, the Ethernet interface is connected to the main control unit through the Ethernet driver module; EMMC, connected to the main control unit; An intrinsically safe power supply, which supplies power to the peripheral circuits of the industrial computer; A multi-channel power management module is used to output multi-channel power to power the memory module and its driver, the main control unit, the Ethernet driver module and EMMC, and the peripherals of the main control unit.

2. The intrinsically safe industrial computer according to claim 1, characterized in that: The switch quantity output by the multi-channel controllable switch quantity output interface is used to control the semiconductor relay.

3. The intrinsically safe industrial computer according to claim 1, characterized in that: The main control unit also provides at least one Console interface and at least one USB-OTG interface.

4. The intrinsically safe industrial computer according to claim 1, characterized in that: The intrinsically safe industrial computer also includes: The TF card slot is connected to the main control unit and is used to insert a TF card.

5. The intrinsically safe industrial computer according to claim 1, characterized in that: The intrinsically safe industrial computer also includes: An emergency stop button connected to the main control unit, the start / stop signal of the emergency stop button being received by one of the multiple switch input interfaces; and / or An independent knob is used to adjust the forward / reverse direction of the frequency converter, and one of the multi-channel switch input interfaces receives the forward / reverse rotation signal of the frequency converter.

6. The intrinsically safe industrial computer according to claim 1 or 5, characterized in that: The intrinsically safe industrial computer also includes: Multiple independent buttons are used for start and stop control of different external set speeds, and each start and stop signal is received by a multi-channel switch input interface.

7. The intrinsically safe industrial computer according to claim 1, characterized in that: The intrinsically safe power supply is used to convert and generate a 3.3V DC power supply, and includes: A first power conversion unit, the power supply is input to the input terminal of the first power conversion unit through a double layer of over-current and over-voltage protection; The second power conversion unit, the voltage output by the first power conversion unit is input to the input end of the second power conversion unit through double-layer over-current and over-voltage protection, and the voltage output by the second power conversion unit is output as a 3.3V DC power supply through double-layer over-current and over-voltage protection.

8. The intrinsically safe industrial computer according to claim 1, characterized in that: The intrinsically safe industrial computer also includes: The dip switch is used at least for system reset or system startup item configuration.

9. The intrinsically safe industrial computer according to claim 1, characterized in that: The main control unit is based on an ARM chip.

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