Digital power distribution intelligent control system and excavator

Abstract

The invention discloses a digital power distribution intelligent control system and an excavator, and belongs to the technical field of excavators, the digital power distribution intelligent control system comprises an external power supply, a digital power distribution module, a display unit, a whole vehicle controller and a remote communication terminal; an external power supply is connected with the power input end of the digital power distribution module; an input channel of the digital power distribution module is connected with a wake-up signal and at least one switch control signal, and an output channel of the digital power distribution module is connected with a display unit power supply, a vehicle control unit power supply, a remote communication terminal power supply and a controlled load power supply; the digital power distribution module communicates with the display unit, the vehicle control unit and the remote communication terminal through a CAN bus; the system is used for replacing a traditional fuse-relay combined circuit in an excavator, system design and application are simplified, and maintenance is convenient; perfect protection and diagnosis functions are achieved, and the system is automatically recovered after faults are eliminated; the whole vehicle data can be monitored and displayed in real time through a background or a cloud end, and the system is high in reliability, high in safety and long in service life.

Description

Technical Field

[0001] This invention belongs to the field of excavator technology, and particularly relates to a digital power distribution intelligent control system and an excavator. Background Technology

[0002] Currently, the low-voltage power distribution control systems of excavators and other construction machinery products, such as the power circuits for lights, controllers, and windshield wipers, use traditional fuse and relay combination circuits. The main problems with this technology are as follows:

[0003] 1) The fuse cannot be restored after it blows, and the relay circuit wiring is complicated and prone to loose contact, which may cause the circuit to malfunction.

[0004] 2) The protection characteristics of the fuse cannot change according to the load current. For example, the actual load current changes continuously within a certain range with factors such as ambient temperature, but the protection value of the fuse is fixed. If the matching is incorrect, the wiring harness is very likely to burn out.

[0005] 3) Relays are prone to overheating, which affects system stability;

[0006] 4) The vehicle's power distribution system has defects such as not being able to connect to the network or achieve digitalization. Summary of the Invention

[0007] To address the problems existing in the prior art, this invention proposes a digital power distribution intelligent control system. This system replaces the traditional fuse and relay circuits in excavators, adopts modular integrated software control, and directly drives high-power electrical components such as lights and motors without the need for relays. The protection current threshold can be flexibly set through software according to the rated load current. The protection delay time can be set through software according to the load characteristics and application scenarios. It has features such as output overcurrent protection and short circuit protection, and has high reliability and safety. The entire vehicle power distribution system can achieve networked digital power distribution.

[0008] To solve the above problems, the present invention adopts the following technical solution:

[0009] A digital power distribution intelligent control system includes an external power supply, a digital power distribution module, a display unit, a vehicle controller, and a remote communication terminal. The external power supply is connected to the power input terminal of the digital power distribution module. The input channel of the digital power distribution module is connected to a wake-up signal and at least one switch control signal. The output channel of the digital power distribution module is connected to the power supply of the display unit, the power supply of the vehicle controller, the power supply of the remote communication terminal, and at least one controlled load power supply. The digital power distribution module communicates with the display unit, the vehicle controller, and the remote communication terminal via a CAN bus.

[0010] The digital power distribution module responds to the low-level wake-up signal received by the input channel, activates the system power distribution function, controls the display unit, vehicle controller, and remote communication terminal connected to the output channel to be powered on and work, enables the output channel to respond to the switch control signal received by the input channel, and controls the output channel to drive the corresponding controlled load power supply according to the preset logic, and feeds back the power distribution data to the display unit, vehicle controller, and remote communication terminal through the CAN bus.

[0011] Furthermore, the digital power distribution module consists of a power supply unit, a microprocessor, an MSDI (Multi-Switch Detection Interface) input acquisition unit, a power chip unit, a limphome circuit, and a CAN-FD communication unit. The power supply unit connects to an external power source to power the microprocessor. The MSDI input acquisition unit acquires the wake-up signal and switch control signal of the input channel and transmits them to the microprocessor, which then controls the output of the power chip unit according to preset logic. The power chip unit drives the load power supply connected to the output channel and monitors the output channel current in real time. When the power chip unit detects overcurrent or short circuit, it triggers the limphome circuit protection mechanism to cut off the power supply to the corresponding output channel. Power supply is automatically restored after the fault is cleared. The CAN-FD communication unit interacts with the microprocessor to exchange power distribution data and uploads the power distribution data to the CAN bus in real time.

[0012] Furthermore, the external power source is the vehicle's onboard battery.

[0013] Furthermore, the switch control signals include switch control signals for lights, wipers, washers, centralized lubrication devices, and warning devices; among them, lights include cab dome lights, boom lights, platform lights, and step lights; controlled loads include cab dome lights, boom lights, platform lights, step lights, wiper motors, washer motors, centralized lubrication devices, and warning devices; each switch control signal is connected to its corresponding input point in the input channel, and the power supply for each controlled load is connected to its corresponding output point in the output channel.

[0014] Furthermore, the output channel is also connected to the power circuits of the left handle valve, right handle valve, foot pedal valve, and sensor.

[0015] Furthermore, when the input channel receives a low-level wake-up signal, the output channel immediately supplies power to the display unit, vehicle controller, remote communication terminal, left handle valve, right handle valve, foot valve, and sensors.

[0016] Furthermore, when the input channel receives a low-level wake-up signal, and at least one of the switch control signals of the cab top light, platform light, boom light, step light, windshield wiper, washer, centralized lubrication device, and warning device is low, the digital power distribution module controls the output channel to drive the corresponding controlled load power supply to work.

[0017] Furthermore, when the switch control signal of the step light changes from low level to floating, the digital power distribution module cuts off the power supply to the step light according to the preset delay time, ensuring that the driver can safely leave the cab after the vehicle stops operating at night.

[0018] Furthermore, the digital power distribution module sends power distribution data to the display unit via the CAN bus to achieve real-time monitoring of the vehicle's power distribution data; the vehicle controller reads the power distribution data via the CAN bus to perform fault diagnosis and power distribution strategy optimization; the remote communication terminal uploads the power distribution data to a remote platform or cloud; the power distribution data includes voltage, current, temperature data and overcurrent / short circuit / open circuit fault status of each output channel.

[0019] The specific working principle of the aforementioned digital power distribution intelligent control system is as follows: The digital power distribution module is powered by an external power source and enters a standby state. When the input channel receives a low-level wake-up signal, the output channel immediately powers the display unit, vehicle controller, remote communication terminal, left handle valve, right handle valve, foot valve, and sensors. During the effective wake-up signal period, when the switch control signal connected to the input channel is triggered, the output channel of the digital power distribution module drives the corresponding controlled load power supply, including the cab dome light, boom light, platform light, and step light, and the wiper motor and washer motor operate. Real-time power distribution data from each output channel is sent to the display unit via CAN bus communication for real-time monitoring. Simultaneously, the vehicle controller reads the power distribution data via CAN bus communication, performs fault diagnosis, and optimizes the power distribution strategy. The remote communication terminal uploads the power distribution data to a remote platform or cloud, enabling digitalization, visualization, and remote operation and maintenance decision-making through big data analysis.

[0020] This invention also protects an excavator, including the aforementioned digital power distribution intelligent control system, which directly drives the excavator's lights, wipers, washer, handle valve, foot valve, vehicle controller, display unit, and remote communication terminal through a digital power distribution module. The display unit provides real-time feedback on the power distribution status to the driver, and the remote communication terminal uploads the power distribution data to a remote platform or cloud, thereby realizing remote operation and maintenance management of the excavator's power distribution system.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] The digital power distribution intelligent control system provided by this invention replaces the traditional fuse and relay combination circuits in excavators, simplifying system design and application, facilitating maintenance, eliminating the need to replace fuses and relays, and automatically restoring the system after fault elimination; the input / output channel signal logic is programmable and controllable; fewer wirings reduce overall vehicle weight and wiring harness costs; the modules have high integration and small size, facilitating assembly; it has comprehensive protection and diagnostic functions; vehicle data can be monitored and displayed in real time through the backend or cloud; the system provided by this invention has high reliability, high safety, and long lifespan. Attached Figure Description

[0023] Figure 1 The schematic diagram of the system provided by the present invention.

[0024] Figure 2 This is a block diagram showing the constituent units and connection relationships of the digital power distribution module of the present invention.

[0025] The numbers in the diagram are explained as follows: 1-External power supply, 2-Digital power distribution module, 3-Display unit, 4-Vehicle controller, 5-Digital power distribution module input channel, 6-Digital power distribution module output channel, 7-T-BOX terminal. Detailed Implementation

[0026] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figures 1 to 2 As shown, the digital power distribution intelligent control system provided by the present invention includes an external power supply 1, a digital power distribution module 2, a display unit 3, a vehicle controller 4, and a T-BOX terminal 7. The external power supply 1 is connected to the power input terminal of the digital power distribution module 2. The input channel 5 of the digital power distribution module is connected to the wake-up signal and the switch control signals of the cab dome light, platform light, boom light, step light, wipers, washer, centralized lubrication device, and warning device. The output channel 6 of the digital power distribution module is connected to the power supply of the display unit, vehicle controller, remote communication terminal, left handle valve, right handle valve, foot valve, sensor, and the load power supply corresponding to each switch control signal. The digital power distribution module 2 communicates with the display unit 3, vehicle controller 4, and T-BOX terminal 7 via a CAN bus.

[0028] Specifically, such as Figure 2As shown, the digital power distribution module 2 consists of a power supply unit, a microprocessor, an MSDI input acquisition unit, a power chip unit, a limphome circuit, and a CAN-FD communication unit. The power supply unit connects to an external power source to power the microprocessor. The MSDI input acquisition unit acquires the wake-up signal and switch control signal of the input channel and transmits them to the microprocessor, which then controls the output of the power chip unit according to preset logic. The power chip unit drives the load power supply connected to the output channel and monitors the output channel current in real time. When the power chip unit detects an overcurrent or short circuit, it triggers the limphome circuit protection mechanism to cut off the power supply to the corresponding output channel. The power supply is automatically restored after the fault is cleared. The CAN-FD communication unit interacts with the microprocessor to exchange power distribution data and uploads the power distribution data to the CAN bus in real time.

[0029] Specifically, the digital power distribution module 2 responds to the low-level wake-up signal received by the input channel and activates the system power distribution function. When the input channel receives the low-level wake-up signal, the output channel immediately supplies power to the display unit, vehicle controller, remote communication terminal, left handle valve, right handle valve, foot valve, and sensors. During the effective period of the wake-up signal, and when at least one of the switch control signals of the cab dome light, platform light, boom light, step light, wiper, washer, centralized lubrication device, and warning device is at a low level, the digital power distribution module controls the output channel to drive the corresponding controlled load power supply. The module also feeds back the voltage, current, temperature data, and overcurrent / short circuit / open circuit fault status of each output channel to the display unit 3 and T-BOX terminal 7 via the CAN bus. The T-BOX terminal 7 then uploads the power distribution data to the remote platform or cloud.

[0030] Specifically, when the switch control signal of the step light changes from low level to floating, the digital power distribution module cuts off the power supply of the step light according to the preset delay time, ensuring that the driver can safely leave the cab after the vehicle stops working at night.

[0031] This invention also protects an excavator, including the aforementioned digital power distribution intelligent control system; the vehicle-mounted battery is connected as an external power source to the power input terminal of the digital power distribution module; the input channel 5 of the digital power distribution module is connected to the wake-up signal and the switch control signals of the excavator's cab top light, platform light, boom light, step light, wipers, washer, centralized lubrication device, and warning lights; the output channel 6 of the digital power distribution module is connected to the power supply of the display unit, vehicle controller, left handle valve, right handle valve, foot valve, sensors, and the power supply of each controlled load in the cab; the digital power distribution module 2 communicates with the display unit 3, vehicle controller 4, and T-BOX terminal 7 via a CAN bus.

[0032] The digital power distribution module is powered by the vehicle battery and enters standby mode. Upon receiving a low-level wake-up signal from the input channel, the digital power distribution module 2 activates the system's power distribution function. Output channel 6 immediately powers the display unit, vehicle controller, remote communication terminal, left handle valve, right handle valve, foot valve, and sensors. During the effective wake-up signal period, and when at least one of the switch control signals for the cab dome light, platform light, boom light, step light, wipers, washer, centralized lubrication device, and warning device is low, the digital power distribution module controls the output channel to drive the corresponding controlled load power supply. When the current in the output channel exceeds the threshold or a short circuit occurs, the digital power distribution module automatically cuts off the power supply to the corresponding output channel. After the fault is cleared, the power supply is automatically restored. The display unit provides real-time feedback to the driver on voltage, current, temperature data, and overcurrent / short circuit / open circuit fault status of each output channel. The power distribution data is uploaded to a remote platform or cloud via the T-BOX terminal 7, enabling remote operation and maintenance management of the excavator's power distribution system and achieving digitalization and visualization of the vehicle's power distribution.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made by those skilled in the art within the scope of the technology disclosed in this invention, based on the technical solution and inventive concept of the present invention, should be covered within the protection scope of this invention. Therefore, the protection scope of this invention should be determined by the scope of the claims.

Claims

1. A digital power distribution intelligent control system, characterized in that: It includes an external power supply, a digital power distribution module, a display unit, a vehicle controller, and a remote communication terminal; the external power supply is connected to the power input terminal of the digital power distribution module; the input channel of the digital power distribution module is connected to a wake-up signal and at least one switch control signal, and the output channel of the digital power distribution module is connected to the power supply of the display unit, the power supply of the vehicle controller, the power supply of the remote communication terminal, and at least one controlled load power supply; the digital power distribution module communicates with the display unit, the vehicle controller, and the remote communication terminal via a CAN bus. The digital power distribution module responds to the low-level wake-up signal received by the input channel, activates the system power distribution function, controls the display unit, vehicle controller, and remote communication terminal connected to the output channel to be powered on and work, enables the output channel to respond to the switch control signal received by the input channel, and controls the output channel to drive the corresponding controlled load power supply according to the preset logic, and feeds back the power distribution data to the display unit, vehicle controller, and remote communication terminal through the CAN bus.

2. The intelligent digital power distribution control system according to claim 1, characterized in that: The digital power distribution module consists of a power supply unit, a microprocessor, an MSDI input acquisition unit, a power chip unit, a limphome circuit, and a CAN-FD communication unit. The power supply unit connects to an external power source and supplies power to the microprocessor. The MSDI input acquisition unit acquires the wake-up signal and switch control signal of the input channel and transmits them to the microprocessor. The microprocessor controls the output of the power chip unit according to preset logic. The power chip unit drives the load power supply connected to the output channel and monitors the output channel current in real time. When the power chip unit detects overcurrent or short circuit, it triggers the limphome circuit protection mechanism. The CAN-FD communication unit interacts with the microprocessor to exchange power distribution data and uploads the power distribution data to the CAN bus in real time.

3. The intelligent digital power distribution control system according to claim 2, characterized in that: The switch control signals include switch control signals for lights, wipers, washers, centralized lubrication devices, and warning devices; among them, lights include cab dome lights, boom lights, platform lights, and step lights; controlled loads include cab dome lights, boom lights, platform lights, step lights, wiper motors, washer motors, centralized lubrication devices, and warning devices; each switch control signal is connected to its corresponding input point in the input channel, and the power supply for each controlled load is connected to its corresponding output point in the output channel.

4. The intelligent digital power distribution control system according to claim 2, characterized in that: The output channel is also connected to the power circuits of the left handle valve, right handle valve, foot valve, and sensor.

5. The intelligent digital power distribution control system according to claim 4, characterized in that: When the input channel receives a low-level wake-up signal, the output channel immediately supplies power to the display unit, vehicle controller, remote communication terminal, left handle valve, right handle valve, foot valve, and sensor.

6. The intelligent digital power distribution control system according to claim 3, characterized in that: When the input channel receives a low-level wake-up signal, and at least one of the switch control signals of the cab top light, platform light, boom light, step light, wiper, washer, centralized lubrication device, and warning device is low, the digital power distribution module controls the output channel to drive the corresponding controlled load power supply to work.

7. A digital power distribution intelligent control system according to claim 6, characterized in that: When the switch control signal of the stair light changes from low level to floating, the digital power distribution module cuts off the power supply to the stair light according to the preset delay time.

8. The intelligent digital power distribution control system according to claim 2, characterized in that: The digital power distribution module sends power distribution data to the display unit via the CAN bus to achieve real-time monitoring of the vehicle's power distribution data; the vehicle controller reads the power distribution data via the CAN bus and performs fault diagnosis and power distribution strategy optimization; the remote communication terminal uploads the power distribution data to a remote platform or cloud; the power distribution data includes voltage, current, temperature data and overcurrent / short circuit / open circuit fault status of each output channel.

9. An excavator, characterized in that, Including the digital power distribution intelligent control system as described in any one of claims 1-8.

Images