Vehicle-mounted central control screen and engineering machinery

Abstract

The utility model relates to the technical field of engineering machinery, and provides a vehicle-mounted central control screen and engineering machinery, the vehicle-mounted central control screen comprises a CPU, a TBOX module, a first MCU and a second MCU, the CPU is respectively in communication connection with the TBOX module and the first MCU; the first MCU is in communication connection with the second MCU; the second MCU is provided with a plurality of control interfaces, and the second MCU is electrically connected with the vehicle-mounted instrument based on the plurality of control interfaces. According to the utility model, the real-time control function of the engineering machinery can be enriched, hardware resources are utilized to the greatest extent on the basis of saving the hardware resources, and the cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, and in particular to a vehicle-mounted central control screen and engineering machinery. Background Art

[0002] At present, displays are widely used in machinery manufacturing, electric power, petrochemicals, transportation and other fields. Different fields have different requirements for displays, especially for construction machinery such as excavators and cranes, which require the on-board central control screen to integrate display and control functions.

[0003] In the prior art, a TBOX (Telematic BOX, intelligent vehicle-mounted terminal) is deployed in the on-board central control screen of engineering machinery. While realizing the display function, the TBOX is controlled by an MCU (Micro Controller Unit, micro control unit) to realize the control function. The control function is single and the cost is relatively high. Utility Model Content

[0004] The utility model provides a vehicle-mounted central control screen and engineering machinery, which are used to solve the defects of the vehicle-mounted central control screen in the prior art, that is, the control function is single and the cost is relatively high.

[0005] The utility model provides a vehicle-mounted central control screen, including: a CPU, a TBOX module, a first MCU and a second MCU, wherein:

[0006] The CPU is communicatively connected with the TBOX module and the first MCU respectively;

[0007] The first MCU is communicatively connected with the second MCU;

[0008] The second MCU is provided with a plurality of control interfaces, and the second MCU is electrically connected to the vehicle-mounted instrument based on the plurality of control interfaces.

[0009] According to the vehicle-mounted central control screen provided by the utility model, the multiple control interfaces include a body control interface group and a hydraulic control interface, and the body control interface group is used to transmit a body control signal between the second MCU and the vehicle-mounted instrument;

[0010] The hydraulic control interface is electrically connected to the voltage sensor in the vehicle-mounted instrument, and the hydraulic control interface is used to receive the analog voltage input signal transmitted by the voltage sensor.

[0011] According to the vehicle-mounted central control screen provided by the utility model, the body control interface group includes a digital signal interface, an analog current input interface, a PWM output interface and a motor interface, wherein:

[0012] The digital quantity signal interface is used to transmit digital quantity signals between the second MCU and the vehicle-mounted instrument;

[0013] The analog current input interface is used to receive the analog current input signal corresponding to the vehicle-mounted instrument;

[0014] The PWM output interface is electrically connected to a proportional valve in the vehicle-mounted instrument, and the PWM output interface is used to send a PWM signal to the proportional valve;

[0015] The motor interface is electrically connected to the motor in the vehicle-mounted instrument, and the motor interface is used to output a motor control signal to the motor.

[0016] According to the vehicle-mounted central control screen provided by the utility model, the first MCU and the CPU, as well as the first MCU and the second MCU are connected via CAN bus communication.

[0017] According to the vehicle-mounted central control screen provided by the utility model, the TBOX module includes a first communication unit, a second communication unit and a positioning unit, the first communication unit is respectively connected to the monitoring terminal and the USB interface in the CPU, and the second communication unit and the positioning unit are respectively connected to the corresponding serial ports in the CPU;

[0018] The positioning unit is used to obtain the location information of the engineering machinery; the second communication unit is used to establish a communication connection between the engineering machinery and a network; and the first communication unit is used to establish a wireless communication connection between the engineering machinery and the monitoring terminal.

[0019] The vehicle-mounted central control screen provided by the utility model also includes a peripheral module and a data display module, and the peripheral module and the data display module are both electrically connected to the CPU.

[0020] According to the vehicle-mounted central control screen provided by the utility model, the peripheral module includes a camera, a memory, a power amplifier unit and a USB unit.

[0021] According to the vehicle-mounted central control screen provided by the utility model, the data display module includes a display screen, a display screen driving unit and a backlight unit, and the display screen driving unit and the backlight unit are both electrically connected to the display screen.

[0022] According to the vehicle-mounted central control screen provided by the utility model, it also includes a power management module and a voltage limiting protection circuit, and the power management module and the voltage limiting protection circuit are both electrically connected to the first MCU.

[0023] The utility model also provides a construction machinery, comprising: an on-board instrument, an on-board self-diagnosis system and a on-board central control screen as described in any one of the above items, wherein the on-board central control screen is electrically connected to the on-board instrument, and the on-board central control screen is communicatively connected to the on-board self-diagnosis system.

[0024] The utility model provides a vehicle-mounted central control screen and engineering machinery, wherein the CPU in the vehicle-mounted central control screen is directly connected to the TBOX module, the first MCU and the display screen respectively, the first MCU is directly connected to the second MCU, and multiple control interfaces are integrated on the second MCU. The CPU and dual MCU processing framework is adopted to streamline the design framework, and the CPU is directly connected to the TBOX module to save hardware resources. Through the connection between the multiple control interfaces integrated in the second MCU and the corresponding vehicle-mounted instruments, the real-time control function of the engineering machinery is enriched, and at the same time, the hardware resources are maximized and the cost is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. 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 paying any creative work.

[0026] Figure 1 It is a structural schematic diagram of the vehicle-mounted central control screen provided by an embodiment of the utility model.

[0027] Figure 2 This is a connection diagram of the first MCU provided in an embodiment of the utility model.

[0028] Figure 3 It is a connection diagram of the second MCU provided in an embodiment of the utility model.

[0029] Figure 4 It is a connection diagram between the TBOX module and the CPU provided by the embodiment of the utility model.

[0030] Figure 5 It is a connection diagram of a CPU provided in an embodiment of the utility model.

[0031] Figure 6 It is a structural schematic diagram of an engineering machinery provided by an embodiment of the utility model.

[0032] Reference numerals:

[0033] 100: vehicle-mounted central control screen; 110: CPU; 120: TBOX module; 121: first communication unit; 122: second communication unit; 123: positioning unit; 130: first MCU; 140: second MCU; 150: power management module; 160: voltage limiting protection circuit; 170: peripheral module; 171: camera; 172: memory; 173: power amplifier unit; 174: USB unit; 180: data display module; 181: display screen; 182: display screen drive unit; 183: backlight unit; 200: vehicle-mounted instrument; 300: vehicle-mounted self-diagnosis system. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0035] In view of the problem that the vehicle-mounted central control screen in the prior art has a single control function and a high cost, the embodiment of the utility model provides a vehicle-mounted central control screen. Figure 1 Schematic diagram of the structure of the vehicle-mounted central control screen provided by the embodiment of the utility model, such as Figure 1 As shown, the vehicle-mounted central control screen 100 includes: a CPU (Central Processing Unit) 110 , a TBOX (Telematic BOX) module 120 , a first MCU (Micro Controller Unit) 130 and a second MCU 140 .

[0036] The CPU 110 is communicatively connected to the TBOX module 120 and the first MCU 130 respectively.

[0037] The first MCU 130 is communicatively connected with the second MCU 140 .

[0038] The second MCU 140 is provided with a plurality of control interfaces, and the second MCU 140 is electrically connected to the vehicle instrument 200 based on the plurality of control interfaces.

[0039] Specifically, the CPU 110 is directly connected to the TBOX module 120, and the TBOX module 120 is in communication connection with the back-end monitoring terminal, and a communication connection is established between the CPU 110 and the back-end monitoring terminal, that is, the CPU 110 can transmit vehicle information and control instructions to the back-end monitoring terminal through the TBOX module 120, thereby realizing the network communication function in the vehicle-mounted central control screen 100. Compared with the prior art, the embodiment of the utility model saves an MCU between the CPU 110 and the TBOX module 120, simplifies the design framework, saves hardware resources, and reduces the influence of the MCU on the transmission of vehicle information and control instructions, for example, reduces the transmission delay, avoids abnormal operation of the MCU on vehicle information and control instructions, etc.

[0040] In addition, based on the communication connection between the first MCU 130 and the CPU 110 and the second MCU 140, a communication connection is established between the CPU 110 and the second MCU 140. Based on the multiple control interfaces deployed on the second MCU 140, and the electrical connection between the multiple control interfaces and the vehicle-mounted instruments 200 corresponding to the engineering machinery, the transmission of vehicle information and control instructions is realized between the CPU 110 and different vehicle-mounted instruments 200. The CPU 110 can send control instructions to the corresponding vehicle-mounted instruments 200 through the multiple control interfaces in the second MCU 140, and realize real-time control of the engineering machinery on the vehicle-mounted central control screen 100, maximize the use of hardware resources, reduce the reuse of MCUs, and reduce costs. At the same time, the control functions of the vehicle-mounted central control screen 100 are enriched, and the network communication function and the real-time control function are integrated.

[0041] It should be noted that the multiple control interfaces in the second MCU 140 are programmable control interfaces, and the working mode, setting parameters and functions of each control interface can be flexibly configured through software programming according to application requirements, so that the second MCU 140 can adapt to a variety of different application scenarios and improve the functional scalability and expansion flexibility of the vehicle-mounted central control screen. Optionally, the working mode includes input mode, output mode and interrupt trigger mode, the setting parameters include baud rate and clock frequency, and the function includes serial communication and analog signal conversion.

[0042] Further, Figure 2 : is a connection diagram of the first MCU provided in an embodiment of the utility model, such as Figure 2 As shown, the vehicle-mounted central control screen 100 also includes a power management module 150 and a voltage limiting protection circuit 160 , and the power management module 150 and the voltage limiting protection circuit 160 are both electrically connected to the first MCU 130 .

[0043] Specifically, the power management module 150 is used to provide power supply voltage to each functional module in the vehicle-mounted central control screen 100 to ensure the normal operation of each functional module. The voltage limiting protection circuit 160 is used to adjust the working voltage of the vehicle-mounted central control screen 100 when the working voltage exceeds the preset voltage range until the working voltage is within the preset voltage range to avoid damage to the vehicle-mounted central control screen 100 caused by excessively high or low working voltage. In the embodiment of the utility model, the power-on timing of the power supply in the power management module 150 can be controlled by the first MCU 130 to realize power supply control of each functional module. Secondly, the first MCU 130 can also control the voltage limiting protection circuit 160 to control whether the overvoltage and undervoltage circuit protection functions in the vehicle-mounted central control screen 100 are turned on, and after the overvoltage and undervoltage circuit protection functions are turned on, the voltage protection level of the voltage limiting protection circuit 160 is controlled.

[0044] Optionally, the preset voltage range may be set based on experience, for example, the preset voltage range is [9, 36] or [12, 24], etc., which is not limited in the embodiment of the present utility model.

[0045] Further, the plurality of programmable control interfaces include a body control interface group and a hydraulic control interface, and the body control interface group is used to transmit body control signals between the second MCU 140 and the vehicle-mounted instrument 200;

[0046] The hydraulic control interface is electrically connected to the voltage sensor in the vehicle-mounted instrument 200 , and the hydraulic control interface is used to receive an analog voltage input signal transmitted by the voltage sensor.

[0047] Specifically, based on the functions of the on-board instrument 200 connected to each control interface, the multiple control interfaces deployed in the second MCU 140 can be divided into a body control interface group and a hydraulic control interface. Through the body control interface group, the body control signal can be transmitted between the second MCU 140 and the on-board instrument 200 that realizes the body control function, so as to realize the control of the working state of the engineering machinery, for example, the travel and direction of the engineering machinery. The hydraulic control interface can receive the analog voltage input signal detected by the voltage sensor, and the second MCU 140 processes the analog voltage input signal, or the second MCU 140 transmits the analog voltage input signal to the first MCU 130 through the CAN (Controller Area Network) bus, and the first MCU 130 transparently transmits the analog voltage input signal to the CPU 110, and the CPU 110 processes the analog voltage input signal to realize the monitoring and control of the hydraulic system of the engineering machinery.

[0048] Furthermore, the body control interface group includes a digital signal interface, an analog current input interface, a PWM (Pulse Width Modulation) output interface and a motor interface, wherein:

[0049] The digital quantity signal interface is used to transmit digital quantity signals between the second MCU 140 and the vehicle instrument 200;

[0050] The analog current input interface is used to receive the analog current input signal corresponding to the vehicle instrument 200;

[0051] The PWM output interface is connected to the proportional valve in the vehicle instrument 200, and the PWM output interface is used to send a PWM signal to the proportional valve;

[0052] The motor interface is connected to the motor in the vehicle-mounted instrument 200 , and the motor interface is used to output a motor control signal to the motor.

[0053] Specifically, Figure 3 : is a connection diagram of the second MCU provided in the embodiment of the utility model, such as Figure 3 As shown, in addition to the hydraulic control interface, the second MCU 140 also includes a body control interface group. The body control interface group includes a digital signal interface, an analog current input interface, a PWM output interface and a motor interface, wherein:

[0054] (1) The digital quantity signal interface includes a digital quantity input interface and a digital quantity output interface. The digital quantity input interface includes a digital quantity input high level interface and a digital quantity input low level interface. The digital quantity input high level interface is used to receive a digital quantity input high level signal sent by the vehicle instrument 200, so that the second MCU 140 or the CPU 110 can control the vehicle body according to the digital quantity input high level signal. The digital quantity input high level signal can be an arm extension detection signal, a driving front detection signal, an overload contact switch control signal, a swing action pull rod detection signal, and a switching switch signal. The digital quantity input low level interface is used to receive a digital quantity input low level signal. The digital quantity input low level signal can be a three-circle protection signal and a height limit input signal. In addition, the digital quantity output interface is used to send a digital quantity output high level signal to the vehicle instrument 200, so as to control the operation status of the engineering machinery through the corresponding vehicle instrument 200. For example, the digital output high level signal may be a current signal in the range of 0A to 2A, and the digital output high level signal may be output to the vehicle-mounted instruments 200 such as the master control solenoid valve, the three-color lamp, the buzzer, the flameout control circuit, and the relay. For another example, the digital output high level signal may be a current signal in the range of 0A to 4A, and the digital output high level signal may be output to the vehicle-mounted instruments 200 such as the rotary solenoid valve, the telescopic valve, and the auxiliary winch switching valve.

[0055] (2) The analog current input interface can receive an analog current input signal output by a vehicle instrument. For example, the current value of the analog current input signal is between 0mA and 20mA.

[0056] (3) The PWM output interface is connected to the proportional valve. The second MCU 140 or the CPU 110 can adjust the parameters of the PWM signal through the PWM output interface to control the flow of the proportional valve. The parameters may include duty cycle and voltage amplitude. The proportional valve may be an adaptive telescopic proportional valve and a lifting proportional valve.

[0057] (4) The motor interface is connected to the motor, and a motor control signal can be output to the motor through the motor interface. The motor control signal can control the working state of the motor by controlling the on-off state of the MOS tube in the motor, thereby controlling the extension and retraction state of the pedal driven by the motor or the opening state of the door, etc. The motor can be a DC motor.

[0058] It should be noted that if Figure 3As shown, the digital input high level interface, digital input low level interface, digital output interface, PWM output interface and motor interface are all GPIO (General-Purpose Input / Output) interfaces. The analog current input interface and the hydraulic control interface are both ADC (Analog to Digital Converter) interfaces. After receiving the analog current input signal, the analog current input interface performs analog-to-digital conversion on the analog current input signal and converts the analog current input signal into a digital current input signal. Similarly, after receiving the analog voltage input signal, the hydraulic control interface performs analog-to-digital conversion on the analog voltage input signal and converts the analog voltage input signal into a digital voltage input signal.

[0059] Furthermore, the first MCU 130 and the CPU 110 , as well as the first MCU 130 and the second MCU 140 are connected to each other through a CAN bus communication.

[0060] Specifically, when controlling the construction machinery, the vehicle information received by each control interface can be sent to the first MCU 130 through the CAN bus between the second MCU 140 and the first MCU 130, and then transparently transmitted from the first MCU 130 to the CPU 110 through the CAN bus between the first MCU 130 and the CPU 110. After the CPU 110 processes the vehicle information and generates a control instruction, it first transmits the control instruction to the first MCU 130 through the CAN bus between the first MCU 130 and the CPU 110, and then transmits the control instruction from the first MCU 130 to the second MCU 140 through the CAN bus between the first MCU 130 and the second MCU 140, and then transmits the control instruction from the first MCU 130 to the second MCU 140 through the corresponding control interface in the second MCU 140 to the corresponding on-board instrument 200, thereby realizing the control of the construction machinery.

[0061] In addition, a CAN interface may be reserved in the second MCU 140 to facilitate the user to connect other devices through the CAN interface.

[0062] Further, Figure 4 FIG. 1 is a schematic diagram of the connection between the TBOX module and the CPU provided in the embodiment of the utility model. Figure 4As shown, the TBOX module 120 includes a first communication unit 121, a second communication unit 122 and a positioning unit 123, the first communication unit 121 is respectively connected to the USB (Universal Serial Bus) interface and the monitoring terminal in the CPU 110, and the second communication unit 122 and the positioning unit 123 are respectively connected to the corresponding serial ports in the CPU 110;

[0063] The positioning unit 123 is used to obtain the location information of the engineering machinery; the second communication unit 122 is used to establish a communication connection between the engineering machinery and a network; and the first communication unit 121 is used to establish a wireless communication connection between the engineering machinery and the monitoring terminal.

[0064] Specifically, the positioning unit 123 in the TBOX module 120 can determine the location information corresponding to the engineering machinery through satellite positioning, and the location information can be the latitude and longitude corresponding to the engineering machinery sent by the satellite. Through the connection between the positioning module and the UART (Universal Asynchronous Receiver / Transmitter) serial port corresponding to the CPU 110, the location information of the engineering machinery can be viewed remotely. The first communication unit 121 can be a 4G module or a 5G module, etc. After the CPU 110 obtains the vehicle information of the engineering machinery through each control interface in the second MCU 140, the vehicle information can be transmitted to the first communication unit 121 through the UART serial port, and the vehicle information can be uploaded to the monitoring terminal through the wireless communication connection between the first communication unit 121 and the monitoring terminal. At the same time, the remote data sent by the monitoring terminal can also be received by the first communication unit 121 to realize remote control of the engineering machinery. The second communication unit 122 is a Bluetooth module, a WiFi (Wireless Fidelity) module, or a Bluetooth / WiFi two-in-one module. The second communication unit 122 can convert the signal received by the second communication unit 122 to establish a communication connection between the second communication unit 122 and the network, that is, establish a communication connection between the construction machinery and the network.

[0065] Furthermore, it also includes a peripheral module 170 and a data display module 180 , and both the peripheral module 170 and the data display module 180 are electrically connected to the CPU 110 .

[0066] Specifically, the CPU 110 is directly connected to the data display module 180 , and the CPU 110 can transmit the data to be displayed to the data display module 180 for display, thereby realizing the data display function in the vehicle-mounted central control screen 100 .

[0067] Furthermore, the peripheral module 170 includes a camera 171 , a memory 172 , a power amplifier unit 173 and a USB unit 174 .

[0068] Furthermore, the data display module 180 includes a display screen 181 , a display screen driving unit 182 and a backlight unit 183 , and both the display screen driving unit 182 and the backlight unit 183 are electrically connected to the display screen 181 .

[0069] Specifically, Figure 5 Schematic diagram of the connection of the CPU provided by the embodiment of the utility model. Figure 5 As shown, in addition to being connected to the TBOX module 120 , the CPU 110 is also connected to a peripheral module 170 and a data display module 180 .

[0070] The peripheral module 170 includes a camera 171, a memory 172, a power amplifier unit 173 and a USB unit 174. The camera 171 is used to collect the image to be processed. The image to be processed can be transmitted to the CPU 110 after being processed by the decoder, so that the CPU 110 controls the data display module 180 to display the decoded image to be processed, and realizes the data display function in the vehicle-mounted central control screen 100. Combined with the TBOX module 120 and the second MCU 140, it can realize the integration of data display function, network communication function and real-time control function. The memory 172 is used to increase the storage space of the vehicle-mounted central control screen 100. The vehicle information, control instructions, remote control instructions sent by the monitoring terminal, etc. corresponding to the engineering machinery can be stored in the memory 172. The power amplifier circuit is also integrated in the vehicle-mounted central control screen 100. The power amplifier unit 173 includes a power amplifier circuit and a speaker. When a fault of the engineering machinery is detected, the alarm signal can be amplified by the power amplifier circuit, and the speaker can be driven to broadcast a voice alarm. The power amplifier unit 173 can also improve the sound quality of the vehicle-mounted central control screen 100. The USB unit 174 can be connected to other devices, for example, the USB unit 174 can be connected to a hard disk to further increase the storage space of the vehicle-mounted central control screen 100. The USB unit 174 can also be connected to an emulator, through which the software to be upgraded is burned into the vehicle-mounted central control screen 100 to upgrade the software in the vehicle-mounted central control screen 100.

[0071] The data display module 180 includes a display screen 181, a display screen driving unit 182 and a backlight unit 183. The display screen 181 is directly connected to the CPU 110, supports multi-touch, and is used to display data. The resolution of the display screen 181 can be 1280 720. The display screen driving unit 182 is used to drive the display screen 181 to display data. For example, the display screen driving unit 182 controls the working state of the display screen 181 by sending an enable control signal to the display screen 181 and controlling the level state of the enable control signal. The backlight module is used to control the switch of the backlight tube inside the display screen 181 and adjust the brightness of the backlight tube to ensure the stable output of the backlight tube, thereby ensuring the image effect in the display screen 181.

[0072] Optionally, the memory 172 may be a TF card (Trans-flash Card) or an SD card (Secure Digital Card), etc., which is not limited in the embodiment of the present utility model.

[0073] In addition, the CPU 110 is also connected to an encryption module, which provides a variety of security encryption algorithms. Through the encryption module, vehicle information or control instructions can be encrypted to ensure the security of data transmission.

[0074] The vehicle-mounted central control screen provided by the utility model has a CPU that is directly connected to the TBOX module, the first MCU and the display screen, the first MCU is directly connected to the second MCU, and multiple control interfaces are integrated on the second MCU. The CPU and dual MCU processing framework is adopted to streamline the design framework, and the CPU is directly connected to the TBOX module to save hardware resources. Through the connection between the multiple control interfaces integrated in the second MCU and the corresponding vehicle-mounted instruments, the real-time control function of the engineering machinery is enriched, the hardware resources are maximized, and the cost is greatly reduced. In addition, an amplifier unit is integrated inside the vehicle-mounted central control screen to improve the device integration and reduce the size of the vehicle-mounted central control screen.

[0075] The utility model also provides an engineering machine, Figure 6 Schematic diagram of the structure of the engineering machinery provided by the embodiment of the utility model, such as Figure 6 As shown, the construction machinery includes: an on-board instrument 200, an on-board self-diagnostic system 300 (On-Board Diagnostics, OBD) and an on-board central control screen 100 as described in any of the above items, the on-board central control screen 100 is electrically connected to the on-board instrument 200, and the on-board central control screen 100 is communicatively connected to the on-board self-diagnostic system 300.

[0076] It should be noted that in the vehicle-mounted central control screen 100, the first MCU can also be connected to the vehicle-mounted self-diagnosis system 300 through the CAN bus to obtain the fault information detected by the vehicle-mounted self-diagnosis system 300 and display it on the display screen, so as to facilitate maintenance personnel to quickly and accurately locate the fault part.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A vehicle-mounted central control screen, characterized in that: Applied to engineering machinery, including: CPU, TBOX module, first MCU and second MCU, among which: The CPU is communicatively connected with the TBOX module and the first MCU respectively; The first MCU is communicatively connected with the second MCU; The second MCU is provided with a plurality of control interfaces, and the second MCU is electrically connected to the vehicle-mounted instrument based on the plurality of control interfaces.

2. The vehicle-mounted central control screen according to claim 1, characterized in that: The multiple control interfaces include a body control interface group and a hydraulic control interface, and the body control interface group is used to transmit a body control signal between the second MCU and the vehicle-mounted instrument; The hydraulic control interface is electrically connected to the voltage sensor in the vehicle-mounted instrument, and the hydraulic control interface is used to receive the analog voltage input signal transmitted by the voltage sensor.

3. The vehicle-mounted central control screen according to claim 2, characterized in that: The body control interface group includes a digital signal interface, an analog current input interface, a PWM output interface and a motor interface, wherein: The digital quantity signal interface is used to transmit digital quantity signals between the second MCU and the vehicle-mounted instrument; The analog current input interface is used to receive the analog current input signal corresponding to the vehicle-mounted instrument; The PWM output interface is electrically connected to a proportional valve in the vehicle-mounted instrument, and the PWM output interface is used to send a PWM signal to the proportional valve; The motor interface is electrically connected to the motor in the vehicle-mounted instrument, and the motor interface is used to output a motor control signal to the motor.

4. The vehicle-mounted central control screen according to any one of claims 1 to 3, characterized in that: The first MCU and the CPU, as well as the first MCU and the second MCU, are connected in communication via a CAN bus.

5. The vehicle-mounted central control screen according to any one of claims 1 to 3, characterized in that: The TBOX module includes a first communication unit, a second communication unit and a positioning unit, wherein the first communication unit is connected to the monitoring terminal and the USB interface in the CPU respectively, and the second communication unit and the positioning unit are connected to the corresponding serial ports in the CPU respectively; The positioning unit is used to obtain the location information of the engineering machinery; the second communication unit is used to establish a communication connection between the engineering machinery and a network; and the first communication unit is used to establish a wireless communication connection between the engineering machinery and the monitoring terminal.

6. The vehicle-mounted central control screen according to any one of claims 1 to 3, characterized in that: It also includes a peripheral module and a data display module, and both the peripheral module and the data display module are electrically connected to the CPU.

7. The vehicle-mounted central control screen according to claim 6, characterized in that: The peripheral module includes a camera, a memory, a power amplifier unit and a USB unit.

8. The vehicle-mounted central control screen according to claim 6, characterized in that: The data display module includes a display screen, a display screen driving unit and a backlight unit. The display screen driving unit and the backlight unit are both electrically connected to the display screen.

9. The vehicle-mounted central control screen according to any one of claims 1 to 3, characterized in that: It also includes a power management module and a voltage limiting protection circuit, and both the power management module and the voltage limiting protection circuit are electrically connected to the first MCU.

10. An engineering machine, characterized in that: include: An on-board instrument, an on-board self-diagnosis system and an on-board central control screen as described in any one of claims 1 to 9, wherein the on-board central control screen is electrically connected to the on-board instrument, and the on-board central control screen is communicatively connected to the on-board self-diagnosis system.

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