Handheld intrinsic safety type refueling control terminal and refueling equipment

Abstract

The invention relates to the field of refueling equipment, in particular to a handheld intrinsic safety type refueling control terminal and refueling equipment. The handheld intrinsic safety type refueling control terminal comprises a control terminal body, a quick connector and an electric connection assembly. The control terminal main body is connected with the quick connector; the electric connection assembly is connected with the quick connector, and the electric connection assembly is electrically connected with the control terminal body and used for being electrically connected with an external control system. Wherein the quick connector is used for being connected with an oil filling pipe and an oil supply pipe, the oil filling pipe is used for filling oil into to-be-filled equipment, and the oil supply pipe is connected with the oil supply equipment. The handheld intrinsic safety type refueling control terminal is applied to refueling equipment, is used for being connected to a refueling pipe and is electrically connected with a control system, so that the refueling state can be controlled through the handheld intrinsic safety type refueling control terminal, and the refueling state can be controlled through the handheld intrinsic safety type refueling control terminal. The possibility of refueling accidents is greatly reduced, and refueling convenience and flexibility are improved.

Description

Technical Field

[0001] The invention relates to the field of refueling equipment, and in particular to a handheld intrinsically safe refueling control terminal and refueling equipment. Background Art

[0002] At present, when refueling is carried out at each gas station, the refueling task setting, refueling start and stop control, and refueling process monitoring are all carried out on the refueling control box located in the gas station. After setting the relevant refueling parameters on the refueling control box, refueling starts after connecting the refueling hose to the fuel tank. This operation method has certain technical defects:

[0003] When refueling, the staff at the gas station needs to set the parameters such as the refueling volume and refueling flow rate according to the requirements of the control personnel of the equipment to be refueled, and the refueling start and stop operation needs to be determined according to the connection between the refueling hose and the equipment to be refueled, and the preparation of personnel and equipment. For various heavy equipment to be refueled (such as large aircraft, ships, etc.), if their position can only be limited to a fixed point or the area near the refueling control box during refueling, the complexity of the refueling process is greatly increased, and it also puts forward more stringent requirements on the driver's operation;

[0004] However, if the requirements for the refueling stop position of the refueling equipment are lowered, the distance between the gas station and the refueling equipment will be too far. In this case, the operator can only be informed through the intercom, and the operator will then perform various operations. This operation mode has the problem of inaccurate information transmission, which leads to refueling accidents due to errors in refueling task setting and start-stop control. At the same time, the on-site refueling personnel cannot observe the refueling flow, pressure and other information, and have no grasp of the refueling process. When an emergency occurs, it cannot be handled in time, which invisibly increases the possibility of refueling accidents. The current operation mode determines that the refueling equipment should be as close to the refueling control box as possible during refueling, which greatly reduces the convenience and flexibility of refueling.

[0005] In addition, the refueling operation environment is flammable and explosive. To improve the safety of equipment use, the equipment should have functions such as displaying the oil storage level and the concentration of combustible gas in the refueling place, and be explosion-proof. However, the current refueling equipment does not have the necessary functions such as real-time monitoring of the oil storage level, the concentration of combustible gas in the refueling place, and remote control of the valve switch status. Summary of the invention

[0006] The purpose of the present invention includes providing a handheld intrinsically safe refueling control terminal and refueling equipment, which are used to be connected to the refueling pipe, and the equipment is light in weight and will not cause additional workload to the refueling personnel; it can be electrically connected to the control system of the refueling equipment, and then the refueling status can be controlled through the handheld intrinsically safe refueling control terminal, such as: refueling task setting, refueling start and stop operation and display of refueling process information.

[0007] Therefore, through the handheld intrinsically safe refueling control terminal, the refueling personnel at the gas station can set up refueling tasks, operate refueling start and stop, and monitor refueling process information next to the refueling equipment, and can also set up refueling tasks through the refueling equipment in the gas station, thereby avoiding the problem of refueling accidents caused by inaccurate information transmission leading to refueling task setting and start and stop control errors, and the problem that refueling personnel who are far away from the refueling control equipment cannot observe the refueling flow, pressure and other information, have no grasp of the refueling process, and cannot deal with emergencies in time. This greatly reduces the possibility of refueling accidents and improves the convenience and flexibility of refueling.

[0008] The embodiments of the present invention can be implemented as follows:

[0009] In a first aspect, the present invention provides a handheld intrinsically safe refueling control terminal, the handheld intrinsically safe refueling control terminal comprising a control terminal body, a quick connector and an electrical connection assembly;

[0010] The control terminal body is connected to the quick connector; the electrical connection assembly is connected to the quick connector, and the electrical connection assembly is electrically connected to the control terminal body and is used to electrically connect to an external control system;

[0011] Among them, the quick connector is used to connect with the refueling pipe and the oil supply pipe, the refueling pipe is used to inject oil into the equipment to be refueled, and the oil supply pipe is connected with the oil supply equipment.

[0012] In an optional embodiment, the handheld intrinsically safe refueling control terminal further includes a rotation damping structure, and the control terminal body is rotatably connected to the quick connector via the rotation damping structure.

[0013] In an optional embodiment, one end of the quick connector for connecting to the oil supply pipe is provided with a hose clamp, and the hose clamp is used for clamping with the oil supply pipe.

[0014] In an optional embodiment, the handheld intrinsically safe refueling control terminal further includes a fixing platform connected to the rotation damping structure, and the control terminal body is detachably connected to the fixing platform.

[0015] In an optional embodiment, the control terminal body includes a housing, a panel device and an internal control circuit board;

[0016] The housing is detachably connected to the fixing platform; the panel device is connected to the housing and is electrically connected to an internal control circuit board disposed in the housing;

[0017] The internal control circuit board is electrically connected to the external control system through an electrical connection component.

[0018] In an optional embodiment, the control terminal body further includes a communication module built into the shell, and the communication module is electrically connected to the internal control circuit board.

[0019] In an optional implementation, the panel device includes an operation panel and a display panel, and both the operation panel and the display panel are electrically connected to the internal control circuit board.

[0020] In an optional embodiment, the control terminal body further includes an emergency stop control button and a light control button, and the emergency stop control button and the light control button are both connected to the housing and located on the end surface of the housing;

[0021] Among them, the emergency stop control button and the lighting control button are both electrically connected to the internal control circuit board.

[0022] In a second aspect, the present invention provides a refueling device, the refueling device comprising a control system and the above-mentioned handheld intrinsically safe refueling control terminal;

[0023] The control system is electrically connected to the handheld intrinsically safe refueling control terminal.

[0024] The beneficial effects of the handheld intrinsically safe refueling control terminal and refueling equipment provided by the embodiments of the present invention include:

[0025] The handheld intrinsically safe refueling control terminal includes a control terminal body, a quick connector and an electrical connection component; the control terminal body is connected to the quick connector; the electrical connection component is connected to the quick connector, and the electrical connection component is electrically connected to the control terminal body and is used to be electrically connected to an external control system; wherein the quick connector is used to connect to a refueling pipe and a fuel supply pipe, the refueling pipe is used to inject fuel into the equipment to be refueled, and the fuel supply pipe is connected to the fuel supply equipment.

[0026] The handheld intrinsically safe refueling control terminal is used to connect to the refueling pipe, and the equipment is light in weight and will not cause additional workload for the refueling personnel; it can be electrically connected to the control system of the refueling equipment, and then the refueling status can be controlled through the handheld intrinsically safe refueling control terminal, such as: refueling task setting, refueling start and stop operation, and display of refueling process information.

[0027] Therefore, through the handheld intrinsically safe refueling control terminal, the refueling personnel at the gas station can set up refueling tasks, operate refueling start and stop, and monitor refueling process information next to the refueling equipment, and can also set up refueling tasks through the refueling equipment in the gas station, thereby avoiding the problem of refueling accidents caused by inaccurate information transmission leading to refueling task setting and start and stop control errors, and the problem that refueling personnel who are far away from the refueling control equipment cannot observe the refueling flow, pressure and other information, have no grasp of the refueling process, and cannot deal with emergencies in time. This greatly reduces the possibility of refueling accidents and improves the convenience and flexibility of refueling. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the structure of a handheld intrinsically safe refueling control terminal provided in this embodiment;

[0030] Figure 2 A schematic diagram of the structure of the control terminal body provided in this embodiment, wherein A is a main view and B is a top view;

[0031] Figure 3 A schematic diagram of the control terminal body provided in this embodiment;

[0032] Figure 4 This is a software block diagram of the control terminal body provided in this embodiment.

[0033] Icons: 100-handheld intrinsically safe refueling control terminal; 110-control terminal body; 120-quick connector; 130-electrical connection assembly; 10-fuel supply pipe; 140-rotational damping structure; 150-hose clamp; 160-fixed platform; 111-housing; 112-panel device; 113-operation panel; 114-display panel; 115-emergency stop control button; 116-lighting control button. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0039] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0040] Please refer to Figure 1-Figure 4 , this embodiment provides a handheld intrinsically safe refueling control terminal 100, the handheld intrinsically safe refueling control terminal 100 includes a control terminal body 110, a quick connector 120 and an electrical connection component 130;

[0041] The control terminal body 110 is connected to the quick connector 120; the electrical connection assembly 130 is connected to the quick connector 120, and the electrical connection assembly 130 is electrically connected to the control terminal body 110 and is used to electrically connect to an external control system;

[0042] The quick connector 120 is used to connect with the refueling pipe and the oil supply pipe 10. The refueling pipe is used to inject oil into the equipment to be refueled, and the oil supply pipe 10 is connected with the oil supply equipment.

[0043] Please refer to Figure 1-Figure 4 The working principle of the handheld intrinsically safe refueling control terminal 100 is:

[0044] First, the handheld intrinsically safe refueling control terminal 100 is applied to the refueling equipment, and its purpose is to be electrically connected to the control system of the refueling equipment, so that the staff can flexibly add oil; especially when the equipment to be refueled is far away, the handheld intrinsically safe refueling control terminal 100 can arrange the refueling task, start and stop the refueling work, and monitor the relevant refueling new types in the area where the refueling pipe is close to the equipment to be refueled, so that the refueling work can be carried out more flexibly and safely;

[0045] Specifically, the handheld intrinsically safe refueling control terminal 100 includes a control terminal body 110, a quick connector 120 and an electrical connection assembly 130; the control terminal body 110 is connected to the quick connector 120; the electrical connection assembly 130 is connected to the quick connector 120, and the electrical connection assembly 130 is electrically connected to the control terminal body 110, and is used to be electrically connected to an external control system; wherein the quick connector 120 is used to connect to the refueling pipe and the oil supply pipe 10, the refueling pipe is used to fill oil into the equipment to be refueled, and the oil supply pipe 10 is connected to the oil supply equipment.

[0046] The refueling pipe is equipped with a refueling gun, the purpose of which is to inject oil into the equipment to be refueled; the oil supply pipe 10 is connected to the oil supply equipment of the refueling equipment, and it is a hose; and the setting of the quick connector 120 can quickly complete the installation of the handheld intrinsically safe refueling control terminal 100 according to the needs of use, thereby improving the flexibility of use;

[0047] The handheld intrinsically safe refueling control terminal 100 is used to be connected to the refueling pipe, and the equipment is light in weight and will not cause additional workload to the refueling personnel; it can be electrically connected to the control system of the refueling equipment, and then the refueling status can be controlled through the handheld intrinsically safe refueling control terminal 100, such as: refueling task setting, refueling start and stop operation, and display of refueling process information.

[0048] Therefore, through the handheld intrinsically safe refueling control terminal 100, the refueling personnel at the gas station can set up refueling tasks, operate refueling start and stop, and monitor refueling process information next to the refueling equipment, and can also set up refueling tasks through the refueling equipment in the gas station, thereby avoiding the problem of refueling accidents caused by inaccurate information transmission leading to refueling task setting and start and stop control errors, and the problem that refueling personnel who are far away from the refueling control equipment cannot observe the refueling flow, pressure and other information, have no grasp of the refueling process, and cannot deal with emergencies in a timely manner. This greatly reduces the possibility of refueling accidents and improves the convenience and flexibility of refueling.

[0049] For further information, please refer to Figure 1-Figure 4 In this embodiment, for ease of use, the handheld intrinsically safe refueling control terminal 100 further includes a rotation damping structure 140, and the control terminal body 110 is rotatably connected to the quick connector 120 through the rotation damping structure 140. Through such a setting, the control terminal body 110 connected to the quick connector 120 can adjust its relative angle position for ease of use.

[0050] It can be seen from the above content that the oil supply pipe 10 is a hose. Therefore, in order to improve the connection efficiency between the oil supply pipe 10 and the quick connector 120, the end of the quick connector 120 used for connecting with the oil supply pipe 10 is provided with a hose clamp 150. The hose clamp 150 is used to clamp with the oil supply pipe 10. Its purpose is to quickly connect with the oil supply pipe 10 in this way.

[0051] In addition, on the basis of being provided with the above-mentioned rotation damping structure 140, the handheld intrinsically safe refueling control terminal 100 may further include a fixing platform 160 connected to the rotation damping structure 140, and the control terminal body 110 may be detachably connected to the fixing platform 160. This method aims to improve the flexibility of use.

[0052] As can be seen from the above content, the handheld intrinsically safe refueling control terminal 100 can be set on the refueling pipe based on the need of use, on the basis of being electrically connected to the control system of the refueling equipment, so that the refueling personnel of the gas station can set the refueling task, operate the refueling start and stop, and monitor the refueling process information next to the refueling equipment to be refueled, and can also set the refueling task through the refueling equipment in the gas station, so as to avoid the problem of refueling accidents caused by inaccurate information transmission, the setting of refueling tasks, and the error of start and stop control, and the problem that the refueling personnel far away from the refueling control equipment cannot observe the refueling flow, pressure and other information, do not understand the refueling process, and cannot deal with the emergency in time, which greatly reduces the possibility of refueling accidents and improves the convenience and flexibility of refueling. Based on this, the control terminal body 110 includes a shell 111, a panel device 112 and an internal control circuit board; the shell 111 is detachably connected to the fixing platform 160; the panel device 112 is connected to the shell 111, and is electrically connected to the internal control circuit board set in the shell 111; wherein the internal control circuit board is electrically connected to the external control system through the electrical connection component 130.

[0053] In addition, in order to facilitate communication with an external control system, the control terminal body 110 also includes a communication module built into the housing 111, and the communication module is electrically connected to the internal control circuit board. It should be noted that, on the basis of being configured with the above-mentioned electrical connection component 130, it can also communicate in a wireless or wired manner, thereby improving the stability of operation.

[0054] For further information, please refer to Figure 1-Figure 4In this embodiment, the panel device 112 includes an operation panel 113 and a display panel 114, and both the operation panel 113 and the display panel 114 are electrically connected to the internal control circuit board. This method is intended to facilitate the staff to set the refueling task and operate the refueling start and stop through the operation panel 113 on the handheld intrinsically safe refueling control terminal 100 according to the use requirements, and monitor the refueling process information through the display panel 114, or display the relevant information of the refueling equipment.

[0055] In addition, in order to improve its use safety, the control terminal body 110 also includes an emergency stop control button 115 and a light control button 116. The emergency stop control button 115 and the light control button 116 are both connected to the housing 111 and are located on the end surface of the housing 111. The emergency stop control button 115 and the light control button 116 are both electrically connected to the internal control circuit board. Such a setting method is intended to improve the convenience of operation so that the staff can respond quickly when dealing with emergencies or special situations.

[0056] Based on the above content, this embodiment also provides a refueling device, which includes a control system and the above-mentioned handheld intrinsically safe refueling control terminal 100; the control system is electrically connected to the handheld intrinsically safe refueling control terminal 100. The refueling device has all the advantages of the above-mentioned handheld intrinsically safe refueling control terminal 100.

[0057] In summary, please refer to Figure 1-Figure 4 The handheld intrinsically safe refueling control terminal 100 includes a housing 111, a panel device 112, an internal control circuit board and connection components, as well as buttons, keycaps, straps, spring cables and other components. The fuel added during refueling is highly dangerous and is in a flammable and explosive environment. Therefore, the handheld intrinsically safe refueling control terminal 100 is an intrinsically safe explosion-proof device with an explosion-proof grade of ExibⅡBT4. In combination with actual use needs and current technical deficiencies, the main functions of this refueling control terminal are:

[0058] The display panel 114 can provide a display function, and a liquid crystal display screen is used as the display panel 114 with its own backlight; as a display module on the device, the liquid crystal display screen can intuitively, accurately and real-time display refueling-related information to ensure that the displayed information is clear and visible.

[0059] The operation panel 113 can provide input functions. According to the analysis, the input functions should have two functions: digital signal input and analog signal input. The digital signal input function can input functions including "refueling, flow setting, 10, 100, 1000, switch, line break, confirmation", etc. When the refueling operator presses the corresponding button, the system can switch to the corresponding function in time; and the analog signal input mainly includes the "dim" button. After the analog signal of the "dim" button is input to the CPU of the control panel, the CPU adjusts the brightness of the backlight according to the size of the input analog quantity, ensuring that the LCD screen of the equipment can display clearly under different light intensities, and at the same time can effectively reduce the power consumption of the system, providing effective protection for intrinsic safety.

[0060] The communication module can provide communication functions. The device can exchange data with other devices through the communication function. Through communication, the self-set operation mode and other information can be sent to the control system in a timely manner. At the same time, the return status of the control system can be processed in a timely manner and displayed on the LCD screen to facilitate the dispatch of tasks and real-time status monitoring. The system uses CAN bus as the communication module. CAN is the abbreviation of Controller Area Network. It is a network differential communication that reduces the number of wiring harnesses and effectively reduces the interference caused by environmental factors during the communication process. It has the characteristics of reliable communication data, long communication distance, strong anti-interference ability and high efficiency.

[0061] The emergency stop control button 115 can provide an emergency stop function. The "emergency stop" button is an indispensable and important part of the system. When the system malfunctions due to operator error or other uncontrollable reasons, the "emergency stop" button can effectively cut off the system in time to avoid further losses. The design of the "emergency stop" button should be safe and reliable, and its position should be conspicuous on the panel. At the same time, it should be equipped with protective measures to avoid accidental triggering during use.

[0062] The handheld intrinsically safe refueling control terminal 100 is installed on the refueling hose, and the weight of the equipment is small, which will not cause additional work burden to the refueling personnel. The handheld intrinsically safe refueling control terminal 100 has the functions of refueling task setting, refueling start and stop operation, and refueling process information display, and the backlight brightness of the display screen can be adjusted according to the ambient light conditions. The refueling personnel at the gas station can use the handheld intrinsically safe refueling control terminal 100 to set the refueling task, operate the refueling start and stop, and monitor the refueling process information next to the refueling equipment to be refueled; they can also set the refueling task through the refueling control equipment in the gas station, and observe the refueling process information on the handheld intrinsically safe refueling control terminal 100, avoiding the problem of refueling accidents caused by inaccurate information transmission, refueling task setting, start and stop control errors, and the problem that the refueling personnel far away from the refueling control equipment cannot observe the refueling flow, pressure and other information, do not understand the refueling process, and cannot deal with it in time when an emergency occurs. The possibility of refueling accidents is greatly reduced, and the convenience and flexibility of refueling are improved.

[0063] In addition, please refer to Figure 1-Figure 4 The handheld intrinsically safe refueling control terminal 100 also has the following advantages:

[0064] 1. Refueling can be done flexibly, and the refueling position can be flexibly changed according to the stop point of the equipment to be refueled, so as to complete refueling tasks of various distances, such as long, medium and short distances (the refueling task issuance, fuel filling and other operations can be realized next to the equipment to be refueled); 2. The real-time status of the refueling operation can be received and monitored in real time, including information such as refueling pressure, refueling flow, and amount of oil filled; 3. Information related to the refueling system can be received and displayed, such as gas concentration, fire alarm and other safety information; 4. Information on the remaining liquid level and loading capacity of the refueling system can be received and displayed in real time; 5. A variety of refueling modes are provided. The equipment can be connected to the same host computer as the current refueling control box. The refueling operation task can be set by the control terminal of the present invention or by the refueling control box. The refueling personnel can flexibly choose according to the operation requirements.

[0065] Please refer to Figure 1-Figure 4 The specific structure of the handheld intrinsically safe refueling control terminal 100 is as follows:

[0066] It includes an upper housing 111; a dimming button; a lower housing 111; an aviation plug; a key cap; a liquid crystal screen; a tempered shielding glass; a mainboard; a shielding glass pressure plate; a key board; a sealant; a silicone key; an emergency stop switch, etc. The device panel is mainly composed of a keyboard, a dimming button, an emergency stop button and a liquid crystal display. The keyboard is used to realize the human-computer interaction function, the dimming button is used to adjust the backlight brightness of the display, the emergency stop button is used to cut off the system operation in an emergency, and the liquid crystal display provides visual information, etc. Each component on the panel is firmly fixed and has reliable dustproof and waterproof performance.

[0067] The quick connector 120 mainly realizes the connection of the liquid medium channel, and provides an interface for the installation of the electrical connection component 130, the rotary damping structure 140, and the hose. The electrical connection component 130 is used to realize the electrical connection between the core wire of the inner wall of the hose and the internal wiring of the hose. The fixing platform 160 is used to realize the fixation of the control terminal body 110, and the rotary damping structure 140 provides an interface for the installation of the control terminal body 110 or the fixing platform 160, and realizes the 360° rotation function of the terminal device around the central axis of the hose connector. The connector fixing clamp is used to realize the connection between the quick connector 120 and the hose; wherein, the electrical connection component 130 and the control terminal body 110 can be flexibly operated through the 8-core spring cable to meet the power supply and communication requirements of the terminal, and the definition of each core wire is shown in Table 1.

[0068] Table 1 Definition of core wires in the refueling control terminal

[0069] Core wire number Signal 1 24V+ 2 24V－ 3 24V+ 4 24V－ 5 CAN_H 6 CAN_L 7 Emergency stop signal+ 8 Emergency stop signal -

[0070] The refueling device supplies power to the control terminal body 110 through two 24V power supplies, and the control terminal body 110 outputs an emergency stop signal to the refueling device through a passive contact signal, and the two exchange information through the CAN bus.

[0071] The handheld intrinsically safe refueling control terminal 100 can be used to complete the setting and issuing of refueling tasks, as well as display real-time status monitoring information during the refueling process. Tasks can be set and started and stopped through the keyboard, and the CAN bus can be used to communicate with the superior refueling control equipment, and a visual interface can be provided through the LCD display. In addition, since the spring cable can be operated flexibly, the device can be disassembled and held handheld when necessary, which is convenient for refueling personnel to set and supervise refueling tasks.

[0072] The control terminal body 110 adopts FPGA+SDRAM+NAND FLASH as the main control board circuit. FPGA (field programmable gate array) is a kind of chip that can realize the functions of different integrated circuit chips through programming, and the functions of each pin of the chip can be defined through programming. The FPGA chip used in this solution is CME-M5 chip, which has the characteristics of parallel execution of programs and integrates enhanced 8051MCU, which greatly improves the hardware performance of FPGA. The peripherals designed with FPGA logic can ensure the stable and high-speed operation of the circuit system, and the embedded 8051MCU can bring convenience to the design of programming developers and can be used as the main control chip of the system.

[0073] Synchronous dynamic random-access memory (SDRAM) is a dynamic random-access memory (DRAM) with a synchronous interface. Normally DRAM has an asynchronous interface so that it can respond to changes in control inputs at any time. SDRAM has a synchronous interface and waits for a clock signal before responding to control inputs, so that it can be synchronized with the computer's system bus. The clock is used to drive a finite state machine that pipelines incoming instructions. This allows SDRAM to have a more complex operating mode than asynchronous DRAM, which does not have a synchronous interface. Pipelining means that the chip can accept a new instruction before processing the previous instruction. In a write pipeline, the write command can be executed immediately after another instruction is executed, without waiting for the data to be written to the storage queue. In a read pipeline, the required data arrives a fixed number of clock frequencies after the read instruction is issued, and this waiting process allows other additional instructions to be issued. This delay is called latency and is an important parameter. SDRAM is widely used in computer systems. Devices use SDRAM for memory expansion to provide a large enough data buffer for LCD screens and optimize LCD display effects.

[0074] Nand-flash memory is a type of flash memory that uses a nonlinear macrocell mode internally, providing a cheap and effective solution for the implementation of solid-state large-capacity memory. Nand-flash memory has the advantages of large capacity and fast rewrite speed, and is suitable for frequent reading and storage of large amounts of data. The device uses NandFlash chips to store Chinese character fonts, picture negatives and other related resource information.

[0075] The 24VDC power supply provided by the superior refueling equipment, after passing through the power safety barrier, is converted into DC 3V3 by the step-down switching regulator inside the equipment. After DC 3V3 is converted into DC 3V3 through safety barrier isolation, it is converted into DC 1V1 by the step-down switching regulator BL8028. Then DC 3V3 and DC 1V1 jointly drive the FPGA chip CME-M5. The FPGA completes the initialization configuration of the system resources on the chip, starts the 51 core, mobilizes and allocates the resources in the control board, successfully completes the system startup, and enters the working state.

[0076] Figure 4The software block diagram of the control terminal body 110 mainly includes: a driving display function module, a receiving function module and a data processing function module, wherein the driving display function module is divided into a backlight driving module and a liquid crystal display module, the receiving function module includes a communication processing module, a backlight adjustment module, a keyboard module and an emergency stop module, and the data processing module processes the received data and provides feedback.

[0077] The receiving and processing function module synchronously feeds back the CAN bus communication data, backlight adjustment signal, keyboard signal and emergency stop signal to the data processing module. The data processing module passes the corresponding parameters to the driving function display module through the processing algorithm. After receiving the parameters to be displayed, the driving function display module determines the legitimacy of the data, and then displays the legal data or outputs it to the backlight adjustment module.

[0078] The program is initialized by FPGA to allocate resources within the CME-M5 chip and define I / O ports. The 51 system initialization program completes the allocation of resources on the control board. Other subroutines or functions include: memory management and allocation, display, communication, status acquisition, data calculation, data preprocessing, AD sampling, Flash-RAM resource reading, error handling, etc., which together constitute the processing subroutine set of each functional module.

[0079] The keyboard and emergency stop module is responsible for collecting keyboard data and sending it to the data processing unit in interrupt mode.

[0080] The data processing unit processes the received message information and keyboard data, controls the liquid crystal display module to display the corresponding data screen, and controls the CAN sending module to send response information and keyboard key data.

[0081] The normal refueling operation process of the handheld intrinsically safe refueling control terminal 100 is as follows:

[0082] a. The operator sets the task through the keyboard, that is, according to the command, the operator selects the refueling type, pump group and required amount through the keyboard. There is no order requirement for the three inputs, that is, the required amount of fuel can be entered first, then the pump group and refueling type can be selected, and the electric valve opening button can be pressed to start the operation;

[0083] b. Receive the operation authorization signal from the superior refueling control device (i.e. the control system of the refueling equipment) through the data bus;

[0084] c. Press the refueling button to enter the operation state. The LCD screen displays the signal transmitted by the superior refueling control device, and the indicator light indicates the operation status;

[0085] d. When the job is completed, the LCD screen displays a prompt message.

[0086] In addition, the refueling control terminal can also complete the oil transfer operation: the operator can use the keyboard to select the oil extraction type, pump group and extraction volume according to the command. There is no order requirement for the three inputs, that is, you can first enter the fuel extraction volume, then select the pump group and filling type, and press the pump key to start the implementation; and dirty oil operation: the operator can use the keyboard to switch to dirty oil operation according to the command, and press the electric valve opening button to start the implementation. From the above operation process, it can be seen that the refueling control terminal can realize the "one-click" automated refueling, oil transfer, sewage discharge and other operation tasks of refueling.

[0087] It takes 15 seconds for the system to start up. During this period, there is no data and the green light for communication flashes. After the system starts up normally, the communication indicator light (green light) turns to a constant on state. To check the indicator lights on the panel, restarting is also a self-checking process. The indicator lights (except the green light for communication will flash because there is no message data) will be constant on for a few seconds. The operator can judge whether the relevant components are valid based on this. After normal startup, the main interface is displayed. If there is no communication data within 20 seconds, the communication abnormality screen is displayed.

[0088] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A handheld intrinsically safe refueling control terminal, characterized in that: The handheld intrinsically safe refueling control terminal comprises a control terminal body, a quick connector and an electrical connection assembly; The control terminal body is connected to the quick connector; the electrical connection assembly is connected to the quick connector, and the electrical connection assembly is electrically connected to the control terminal body and is used to electrically connect to an external control system; The quick connector is used to connect with a refueling pipe and a fuel supply pipe, the refueling pipe is used to inject fuel into the equipment to be refueled, and the fuel supply pipe is connected with the fuel supply equipment.

2. The handheld intrinsically safe refueling control terminal according to claim 1 is characterized in that: The handheld intrinsically safe refueling control terminal further comprises a rotation damping structure, and the control terminal body is rotatably connected to the quick connector via the rotation damping structure.

3. The handheld intrinsically safe refueling control terminal according to claim 2 is characterized in that: One end of the quick connector used for connecting with the oil supply pipe is provided with a hose clamp, and the hose clamp is used for clamping with the oil supply pipe.

4. The handheld intrinsically safe refueling control terminal according to claim 2 is characterized in that: The handheld intrinsically safe refueling control terminal further comprises a fixing platform connected to the rotation damping structure, and the control terminal body is detachably connected to the fixing platform.

5. The handheld intrinsically safe refueling control terminal according to any one of claims 1 to 4, characterized in that: The control terminal body includes a housing, a panel device and an internal control circuit board; The housing is detachably connected to the fixing platform; the panel device is connected to the housing and is electrically connected to the internal control circuit board disposed in the housing; Wherein, the internal control circuit board is electrically connected to the external control system through the electrical connection component.

6. The handheld intrinsically safe refueling control terminal according to claim 5 is characterized in that: The control terminal body also includes a communication module built into the shell, and the communication module is electrically connected to the internal control circuit board.

7. The handheld intrinsically safe refueling control terminal according to claim 5 is characterized in that: The panel device includes an operation panel and a display panel, and both the operation panel and the display panel are electrically connected to the internal control circuit board.

8. The handheld intrinsically safe refueling control terminal according to claim 5 is characterized in that: The control terminal body also includes an emergency stop control button and a light control button, and the emergency stop control button and the light control button are both connected to the housing and located on the end surface of the housing; Wherein, the emergency stop control button and the lighting control button are both electrically connected to the internal control circuit board.

9. A refueling device, characterized in that: The refueling equipment includes a control system and a handheld intrinsically safe refueling control terminal as described in any one of claims 1 to 8; The control system is electrically connected to the handheld intrinsically safe refueling control terminal.

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