An electronic control system for a walking vehicle

Abstract

The present invention provides an electric control system for a vehicle for mobility commuting. The electric control system for a vehicle for mobility commuting comprises: an electric control unit, the electric control unit includes an electric control system, the electric control system consists of a hardware system and a software system; the software system consists of a main program and a function execution subroutine; the hardware system consists of a central processing unit (CPU), a serial communication interface, a liquid crystal display module and a function key matrix, a program memory EPROM and a data memory RAM and peripheral interface devices. The electric control system for a vehicle for mobility commuting provided by the present invention integrates the touch key with the display screen, and adopts a touch liquid crystal screen, so that the information display is intuitive and easy to operate, and the instruments all adopt integrated circuits, so that the volume is small, strong and durable, DC power supply, low power consumption, easy to carry, good diagnostic effect, and high reception reliability.

Description

Technical Field

[0001] The invention belongs to the technical field of electric control systems, and in particular relates to an electric control system for a mobility scooter. Background Art

[0002] As an important means of transportation, a corresponding electronic control system is required for a commuter vehicle. Since the electronic control technology was first applied to gasoline engines in the 1970s, there has always been a problem of how to ensure the reliability and safety of the electronic control system. The traditional mechanical control automobile engine system has a very high reliability. When the automobile engine adopts an electronic control system and uses an electronic control unit (ECU), sensors and actuators, it should still have the same high reliability and safety. Although the reliability of the system can be improved by improving the reliability of components and performing system reliability design, no matter how to improve the reliability design, the occurrence of failures is inevitable. At this time, the system electronic control unit becomes the last line of defense for system reliability. When the electronic control system fails, maintenance work becomes quite difficult. It is quite difficult to solve the failure of the electronic control system by traditional maintenance methods such as consultation, visual diagnosis, auscultation, olfaction and testing. The research and application of special electronic control systems that cooperate with electronic control systems have become an inevitable requirement for the productization of electronic control systems.

[0003] Therefore, it is necessary to provide a new electric control system for a vehicle to solve the above technical problems. Summary of the invention

[0004] The technical problem solved by the present invention is to provide an electronic control system for a vehicle that integrates touch keys and a display screen, adopts a touch liquid crystal screen, makes information display intuitive, and is easy to operate. All instruments adopt integrated circuits, making the system small in size, durable, DC powered, low in power consumption, easy to carry, good in diagnostic effect, and high in reception reliability.

[0005] In order to solve the above technical problems, the electric control system for a mobility vehicle provided by the present invention comprises: an electric control unit, the electric control unit comprises an electric control system, and the electric control system comprises a hardware system and a software system;

[0006] The software system consists of a main program and a function execution subroutine;

[0007] The hardware system is composed of a central processing unit (CPU), a serial communication interface, a liquid crystal display module and a function key matrix, a program memory EPROM and a data memory RAM and peripheral interface devices.

[0008] The serial communication interface adopts RS-232C bus, the input signal is converted from RS-232C signal level to TTL level through the level converter, and the output signal is converted from TTL level to RS-232C signal level through the level converter, that is, the electronic control unit can communicate with the equipment with RS-232C compatible interface;

[0009] The LCD module is the interface for the electronic control unit to communicate with the user, that is, the user can obtain the maintenance technical guide and the operation steps of the diagnostic instrument through the prompt information on the LCD screen. The LCD module adopts the TPLCM-240128T touch screen LCD module;

[0010] The program memory EPROM and data memory RAM are specifically as follows:

[0011] (1) The program memory is used to store the instruction code and small Chinese character library of the control program, and the model of the program memory is 27C256;

[0012] (2) The data storage device is used to temporarily store fault codes, system information and sampling signal information, and the model of the data storage device is 62256;

[0013] The central processing unit (CPU) is the core of the electronic control system. Various functions of the electronic control system are realized by running the control program through the central processing unit. The model of the central processing unit is 8031. The circuit design of the central processing unit is not only simple and convenient, but also easy to expand in functional design, and also has transplantation function.

[0014] As a further solution of the present invention, the level converter uses 1488 and 1489 chips to realize the level conversion between TTL and RS-232C. The electronic control system and the electronic control system realize data transmission through serial communication to complete various functions of the electronic control unit. The serial communication interface is the link between the electronic control systems.

[0015] As a further solution of the present invention, the interface on the TPLCM-240128T touch screen liquid crystal display module can be divided into three parts according to function, namely, a scanning mode selection interface, a liquid crystal display module interface and an automatic scanning mode interface.

[0016] As a further solution of the present invention, the main program includes the following parts:

[0017] (1). Set up the stack, initialize the CPU internal registers and external I / O ports;

[0018] (2). Electronic control system hardware self-check;

[0019] (3).Key detection status.

[0020] As a further solution of the present invention, the function execution subroutine comprises the following functions:

[0021] (1). Receive fault information;

[0022] (2). Query fault information;

[0023] (3). Erase fault information.

[0024] As a further solution of the present invention, the electric control system may be used to receive fault information stored in the electric control system for reference by maintenance personnel.

[0025] As a further solution of the present invention, the TPLCM-240128T type liquid crystal display module contains a T6963C controller. There are two ways to interface this liquid crystal display module with the CPU, as follows:

[0026] Method 1: Direct access method, the CPU can use the data bus and control signal to directly use the I / O device access form to control the T6963C type LCD display module;

[0027] Method 2: Indirect control method, the CPU indirectly controls the LCD display module through a parallel interface. According to the needs of the LCD display module, the parallel interface requires an 8-bit parallel port and a 3-bit parallel port.

[0028] Compared with the related art, the electric control system for a mobility scooter provided by the present invention has the following beneficial effects:

[0029] 1. The present invention integrates the touch key and the display screen, and adopts a touch LCD screen to make the information display intuitive and easy to operate. The instrument is fully integrated with integrated circuits, which makes it small in size, durable, DC powered, low in power consumption, easy to carry, good in diagnostic effect, and high in reception reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0031] Figure 1 It is the principle flow chart of the present invention;

[0032] Figure 2 is a schematic diagram of an electronic control unit of the present invention;

[0033] Figure 3 It is a partial functional schematic diagram of the electronic control unit of the present invention. DETAILED DESCRIPTION

[0034] Please refer to Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 It is the principle flow chart of the present invention; Figure 2 is a schematic diagram of an electronic control unit of the present invention; Figure 3 The electronic control system for a mobility vehicle includes: an electronic control unit, the electronic control unit includes an electronic control system, and the electronic control system is composed of a hardware system and a software system;

[0035] The software system consists of a main program and a function execution subroutine;

[0036] The hardware system is composed of a central processing unit (CPU), a serial communication interface, a liquid crystal display module and a function key matrix, a program memory EPROM and a data memory RAM and peripheral interface devices.

[0037] The serial communication interface adopts RS-232C bus, the input signal is converted from RS-232C signal level to TTL level through the level converter, and the output signal is converted from TTL level to RS-232C signal level through the level converter, that is, the electronic control unit can communicate with the equipment with RS-232C compatible interface;

[0038] The LCD module is the interface for the electronic control unit to communicate with the user, that is, the user can obtain the maintenance technical guide and the operation steps of the diagnostic instrument through the prompt information on the LCD screen. The LCD module adopts the TPLCM-240128T touch screen LCD module;

[0039] The program memory EPROM and data memory RAM are specifically as follows:

[0040] (1) The program memory is used to store the instruction code and small Chinese character library of the control program, and the model of the program memory is 27C256;

[0041] (2) The data storage device is used to temporarily store fault codes, system information and sampling signal information, and the model of the data storage device is 62256;

[0042] The central processing unit (CPU) is the core of the electronic control system. Various functions of the electronic control system are realized by running the control program through the central processing unit. The model of the central processing unit is 8031. The circuit design of the central processing unit is not only simple and convenient, but also easy to expand in functional design, and also has transplantation function.

[0043] After the electronic control system and the electronic control system serial communication transmission line are correctly connected and the power supply is normal, the power switch of the electronic control system can be turned on, and then the electronic control system is started to enter the working state. Each time the power is turned on or the reset button is pressed, the electronic control system will first perform a system self-check to detect whether the system's software and hardware are normal. The self-check content includes: CPU diagnosis, external data memory RAM diagnosis, external program memory EPROM diagnosis, and the CPU diagnosis includes the instruction system, on-chip registers and data memory, on-chip timer, interrupt system, etc.

[0044] When the system self-check passes, the LCD screen continues to display the model, version number, designer and other information of the ECU. After this screen is displayed for 3 seconds, it will automatically enter the function selection screen of the ECU. Figure 2 As shown, the details are as follows:

[0045] (1) When selecting 1 and touching the OK button, the electronic control system will communicate with the electronic control system to receive the fault information of the electronic control unit and temporarily store it in the random access memory. After the reception is completed, the display screen returns to the main function selection screen and waits for other functions to be executed;

[0046] (2) When selecting 2 and touching the OK button, the electronic control system first determines whether the fault information has been received. If this function is executed without executing the "receiving fault information" of function 1, the electronic control system will give the corresponding fault prompt information. When the OK button is touched, it will return to the main function selection screen, allowing the user to continue the operation. If the "receiving fault information" of function 1 has been completed, function 2 will be executed;

[0047] (3) After the fault repair is completed, select 3 to clear all fault codes in the memory of the electronic control unit. When the engine is run again, if there is no erased fault code in the electronic control unit, it means that the fault has been completely cleared.

[0048] The level converter uses 1488 and 1489 chips to realize the level conversion between TTL and RS-232C. The electronic control system and the electronic control system realize data transmission through serial communication to complete various functions of the electronic control unit. The serial communication interface is the link between the electronic control systems.

[0049] The interface on the TPLCM-240128T touch screen liquid crystal display module can be divided into three parts according to the function, namely, a scanning mode selection interface, a liquid crystal display module interface and an automatic scanning mode interface.

[0050] The TP-LCM series touch screen has excellent visibility and durability. The touch screen material is glass coated with a layer of conductive glue with strong hardness. Compared with other types of touch screens, it has high transparency and stronger scratch resistance. At the same time, the TP-LCM series touch screen not only has high sensitivity and high reliability, but its unique sensor circuit can meet the touch of various types of people, no matter how different their contact characteristics are. The touch key is composed of transparent conductive lines etched on the glass surface, forming a very stable key structure, which is easy to maintain and has low power consumption. The sensor circuit and the dedicated integrated circuit work under the +5V power supply, and the working current is only more than ten milliamperes. Its parameters are as follows:

[0051] Number of dots: 240×128;

[0052] Spot size (mm): 0.40×0.40;

[0053] Point pixel size (mm): 0.45×0.45;

[0054] Effective field of view (mm): 144×64;

[0055] Module size (mm): 144×104;

[0056] Controller: T6963C;

[0057] Number of touch keys: 16×6;

[0058] The automatic scanning mode interface is as follows:

[0059] In the automatic scanning mode, the position of the touch key is automatically identified by the dedicated chip AS IC on the PCB board. After confirmation, the column number and row number of the identified position are respectively placed in DS0-DS3 and DS4-DS6, and DS7 indicates whether multiple rows are touched at the same time. In order to obtain the above information, the CPU should first set SCAN to a low level and start AS IC to prepare for scanning. Once AS IC detects that a key is touched, a 2ms wide positive pulse signal is sent from the TOUCH terminal. After receiving the TOUCH signal, the CPU will set CSCAN to a low level, forcing AS IC to complete a complete scanning cycle, and then send a 4ms wide positive pulse signal to the CPU through the "END" terminal. At this time, the 8-bit data read by the CPU from DS0-DS7 will contain all the information of the touched key position;

[0060] At the end of a key operation cycle, the CPU sets CSCAN to a high level, putting the AS IC in a power-saving state.

[0061] The main program includes the following parts:

[0062] (1). Set up the stack, initialize the CPU internal registers and external I / O ports;

[0063] (2). Electronic control system hardware self-check;

[0064] (3).Key detection status.

[0065] The function execution subroutine comprises the following functions:

[0066] (1). Receive fault information;

[0067] (2). Query fault information;

[0068] (3). Erase fault information.

[0069] The electronic control system may be used to receive fault information stored in the electronic control system for reference by maintenance personnel.

[0070] The TPLCM-240128T LCD module contains a T6963C controller. There are two ways to interface this LCD module with the CPU, as follows:

[0071] Method 1: Direct access method, the CPU can use the data bus and control signal to directly use the I / O device access form to control the T6963C type LCD display module;

[0072] Method 2: Indirect control method, the CPU indirectly controls the LCD display module through a parallel interface. According to the needs of the LCD display module, the parallel interface requires an 8-bit parallel port and a 3-bit parallel port.

[0073] The electronic control unit has the following functions:

[0074] (1) Graphic information display function: As an interface tool between the user and the electronic control unit, the electronic control system should be able to provide users with convenient information such as fault information, fault phenomenon, maintenance measures and instructions for use. Therefore, the LCD module is used, which is small in size, has a large display capacity and is easy for users to carry;

[0075] (2) Real-time monitoring function: The electronic control system is equipped with a function key matrix, so it can monitor the user's key input in real time and complete the specified control process according to the user input;

[0076] (3) Function of receiving fault information of the electronic control system: The electronic control system sends the command code of "receive fault information" to the electronic control unit through the serial communication function, and then receives the fault information detected by the electronic control unit and stores it in the static memory of the electronic control system, waiting for user query and analysis.

[0077] (4) Query fault information: This function provides users with the specific content of the fault information they have received, such as the number of faults, fault name, phenomenon caused by the fault, possible causes of the fault, reference solutions for fault repair, etc.

[0078] (5) Erase fault information function: After the fault repair is completed, this function can be executed to clear the fault information stored in the electronic control unit, and then the engine can be run to check whether the fault occurs again. If the cleared fault code does not exist when receiving it again, it means that the fault has been eliminated;

[0079] (6) Display vehicle system parameters: The electronic control system receives the system parameters recorded by the electronic control unit, which can provide certain conveniences for users, such as the vehicle's production date, model, mileage, fuel grade and rated power, etc., which can provide a reliable basis for vehicle market transactions;

[0080] (7) Dynamic testing and parameter adjustment: The electronic control system can dynamically receive fault codes and fault signal sampling values ​​when the engine is running, and then display the dynamic change curve before and after the fault signal occurs in the form of "signal value-time" or "signal value-speed" for reference by maintenance technicians. The electronic control unit instrument can also be used to adjust some calibration parameters in the electronic control system, such as engine limit speed, sensor calibration value, etc.

[0081] The present invention integrates the touch key and the display screen, adopts a touch liquid crystal screen, makes the information display intuitive and easy to operate, and the instrument is fully integrated with integrated circuits, so that it is small in size, durable, DC powered, low in power consumption, easy to carry, good in diagnostic effect, and high in reception reliability.

[0082] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electronic control system for a mobility vehicle, characterized in that: include: An electronic control unit, wherein the electronic control unit comprises an electronic control system, and the electronic control system comprises a hardware system and a software system; The software system consists of a main program and a function execution subroutine; The hardware system is composed of a central processing unit (CPU), a serial communication interface, a liquid crystal display module and a function key matrix, a program memory EPROM and a data memory RAM and peripheral interface devices. The serial communication interface adopts RS-232C bus, the input signal is converted from RS-232C signal level to TTL level through the level converter, and the output signal is converted from TTL level to RS-232C signal level through the level converter, that is, the electronic control unit can communicate with the equipment with RS-232C compatible interface; The LCD module is the interface for the electronic control unit to communicate with the user, that is, the user can obtain the maintenance technical guide and the operation steps of the diagnostic instrument through the prompt information on the LCD screen. The LCD module adopts the TPLCM-240128T touch screen LCD module; The program memory EPROM and data memory RAM are specifically as follows: (1) The program memory is used to store the instruction code and small Chinese character library of the control program, and the model of the program memory is 27C256; (2) The data storage device is used to temporarily store fault codes, system information and sampling signal information, and the model of the data storage device is 62256; The central processing unit (CPU) is the core of the electric control system. All functions of the electric control system are realized by running the control program through the central processing unit. The model of the central processing unit is 8031. The circuit design of the central processing unit is not only simple and convenient, but also easy to expand in function design, and also has a transplantation function; The TPLCM-240128T LCD module contains a T6963C controller. There are two ways to interface this LCD module with the CPU, as follows: Method 1: Direct access method, the CPU can use the data bus and control signal to directly use the I / O device access form to control the T6963C type LCD display module; Method 2: Indirect control method, the CPU indirectly controls the LCD display module through a parallel interface. According to the needs of the LCD display module, the parallel interface requires an 8-bit parallel port and a 3-bit parallel port.

2. The electric control system for a mobility scooter according to claim 1, characterized in that: The level converter uses 1488 and 1489 chips to realize the level conversion between TTL and RS-232C. The electronic control system and the electronic control system realize data transmission through serial communication to complete various functions of the electronic control unit. The serial communication interface is the link between the electronic control systems.

3. The electric control system for a mobility scooter according to claim 1, characterized in that: The interface on the TPLCM-240128T touch screen liquid crystal display module can be divided into three parts according to the function, namely, a scanning mode selection interface, a liquid crystal display module interface and an automatic scanning mode interface.

4. The electric control system for a mobility scooter according to claim 1, characterized in that: The main program includes the following parts: (1). Set up the stack, initialize the CPU internal registers and external I / O ports; (2). Electronic control system hardware self-check; (3).Key detection status.

5. The electric control system for a mobility scooter according to claim 1, characterized in that: The function execution subroutine comprises the following functions: (1). Receive fault information; (2). Query fault information; (3). Erase fault information.

6. The electric control system for a mobility scooter according to claim 1, characterized in that: The electronic control system may be used to receive fault information stored in the electronic control system for reference by maintenance personnel.

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