An underground shovel brake test control system and a test method thereof

Abstract

The application discloses a kind of underground shovel loader brake test control systems and its test method, belong to the technical field of underground shovel loader control device.The shovel loader brake test control system of the application includes display, main controller, state unit and test unit, protection logic is set in main controller, state unit is connected with main controller, can make the signal of state unit directly enter main controller.The main use of the application is that underground shovel loader driver needs to activate key switch and test button two actions, in the form of double insurance, ensure that underground shovel loader can check the performance of related components involved in underground shovel loader brake system before operation, greatly reduce the risk of electromagnetic valve jam problem generated in the process of underground shovel loader driving, improve the safety of underground shovel loader use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of control device of underground shovel, more particularly, to a brake test control system of underground shovel and a test method thereof. BACKGROUND

[0002] At present, the brake system of underground shovel needs to be tested manually by the operator, if the operator fails to test according to the requirements, there is a risk of brake failure in the running process of underground shovel, which has great safety hazard. The brake solenoid valve is electrically controlled, and there is a risk of solenoid valve sticking, causing traffic safety hazard. The working environment of underground shovel is narrow roadway, and brake failure is easy to cause serious safety accidents.

[0003] According to the search, the invention patent application with the name of "a brake detection method and a detection system thereof (application publication number: CN102795220A)" discloses a technical scheme that automatically detects the performance of each item in the brake system before starting the car, and then prompts the driver through a multimedia device, so that the driver can know whether the brake system is safe.

[0004] The invention patent application with the name of "a car brake detection method and a detection system (application publication number: CN104512402A)" discloses a detection system of car brake, which detects whether the car control system, hydraulic device, power-assisted system, brake pump and brake disc are normally running, and informs the driver through the display screen.

[0005] The utility model patent application with the name of "an automatic detector for car brake system (application publication number: CN201405842Y)" discloses a system driven by PIC18F452 single-chip microcomputer, which combines a small-angle sensor, a pressure sensor and a viscosity sensor, collects the performance data of car brake disc, brake pad, vacuum booster pump and brake master cylinder, and displays the results on the liquid crystal display module in the car console after data processing.

[0006] At present, the brake detection systems in the prior art are mostly used in the field of automobiles, and the driving environment of automobiles is quite different from that of underground shovel. Therefore, the brake detection system of automobile is not suitable for underground shovel, and shovel lacks a brake automatic detection system suitable for its working environment. SUMMARY

[0007] 1. Technical problems to be solved by the present application

[0008] The present application provides a brake test control system suitable for underground shovel, which realizes automatic testing of the brake system of underground shovel and improves the safety of equipment use.

[0009] 2. Technical solution

[0010] To achieve the above-mentioned purpose, the technical solution provided by the present application is:

[0011] A brake test control system for underground scraper, comprising a display, a main controller, a state unit and a test unit, the main controller is provided with protection logic, the state unit is connected with the main controller, and the signal of the state unit can directly enter the main controller;

[0012] The state unit is composed of a key switch, an engine controller, a gearbox controller, an engine throttle pedal, a brake pedal and a test button;

[0013] The main controller can directly send signals to the engine controller and the gearbox controller in the state unit for controlling the engine and the gearbox;

[0014] The test unit is connected with the main controller, and the main controller can send signals to the test unit for controlling the test unit;

[0015] The display is connected with the main controller for displaying various states in the brake test control process of the underground scraper.

[0016] As a further improvement of the present application, the test unit comprises a first brake electromagnetic valve and a second brake electromagnetic valve; the main controller sends signals to the first brake electromagnetic valve and the second brake electromagnetic valve to control the energization and de-energization of the first brake electromagnetic valve and the second brake electromagnetic valve;

[0017] As a further improvement of the present application, the main controller first controls the first brake electromagnetic valve to maintain the energized state for 1 second and then de-energizes, and then controls the second brake electromagnetic valve to maintain the energized state for 1 second and then de-energizes.

[0018] As a further improvement of the present application, the protection logic in the main controller is that when the test button is in an inactive state, the first brake electromagnetic valve and the second brake electromagnetic valve cannot be activated, and the display displays information that brake test needs to be performed.

[0019] As a further improvement of the present application, the main controller is connected with an auxiliary controller, the auxiliary controller is connected with a radar unit, and corresponding protection logic is set in the main controller and the auxiliary controller according to the detection signal of the radar unit.

[0020] As a further improvement of the present application, the radar unit comprises a front radar group, a rear radar group, a left radar group and a right radar group, each radar group comprises 3-6 radar sensors, and the radar sensors are uniformly distributed around the underground scraper.

[0021] As a further improvement of the present application, the radar sensor adopts a millimeter wave radar.

[0022] The underground shovel brake test method of the present application comprises the following steps:

[0023] Step 1: Start the brake test system of the underground shovel, the starting process comprising S1-S3:

[0024] S1: Turn on the key switch to make it active;

[0025] S2: Start the engine controller and the gearbox controller in turn, while making the engine throttle pedal and the brake pedal inactive, the signals of the components in S2 directly entering the main controller;

[0026] S3: Press the test button to make it active;

[0027] The main controller sends signals to the engine controller and the gearbox controller according to the signals obtained in S2, for controlling the states of the engine and the gearbox;

[0028] Step 2: The main controller controls the test unit, comprising S4:

[0029] S4: The test unit comprises a first brake solenoid valve and a second brake solenoid valve, the main controller first controls the first brake solenoid valve to be powered on and then powered off, and then controls the second brake solenoid valve to be powered on and then powered off;

[0030] Step 3: The display outputs the test result, comprising S5:

[0031] S5: The signals of the main controller enter the display, and the display outputs the test result.

[0032] As a further improvement of the present application, the engine controller and the gearbox controller in the first step respectively control the engine to be in the highest speed state, and the gear of the gearbox to be in the 2nd gear.

[0033] The underground shovel of the present application is provided with the underground brake shovel test control system as described above.

[0034] 3. Beneficial effects

[0035] Compared with the prior art, the technical scheme provided by the present application has the following beneficial effects:

[0036] The underground shovel brake test control system and the test method thereof, which comprises a display, a main controller, a state unit and a test unit. The underground shovel driver needs to activate the key switch and the test button in two actions to ensure that the performance of the components involved in the brake system can be checked before the underground shovel is operated, which greatly reduces the risk of electromagnetic valve sticking during the driving process of the underground shovel and improves the safety of the underground shovel. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 : underground shovel brake test control system schematic diagram;

[0038] Figure 2 : underground shovel brake test method schematic diagram;

[0039] Figure 3 : underground shovel component start-up logic schematic diagram;

[0040] Figure 4 : underground shovel component circuit connection schematic diagram;

[0041] Explanation of reference numerals in the schematic diagram:

[0042] 1, key switch; 2, engine controller; 3, gearbox controller; 4, engine throttle pedal; 5, brake pedal; 6, test button; 7, display; 8, main controller; 9, first brake solenoid valve, 10, second brake solenoid valve; 11, auxiliary controller; 12, radar group left; 13, radar group right; 14, radar group front; 15, radar group rear. DETAILED DESCRIPTION

[0043] In order to further understand the content of the present application, the present application will be described in detail in conjunction with the accompanying drawings Figures 1-4 and examples.

[0044] The structure, proportion, size, etc. shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification, to enable those skilled in the art to understand and read, and are not used to define the limiting conditions under which the present application can be implemented, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that the present application can produce, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like used in the present specification are only for the convenience of clear description, and are not used to limit the scope of implementation, the change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the implementation scope of the present application.

[0045] Example 1

[0046] AsFigure 1 As shown in the figure, the underground shovel brake test control system of the embodiment comprises a display 7, a main controller 8, a state unit and a test unit. The state unit is connected with the main controller 8, so that the signals of the state unit can directly enter the main controller 8. The test unit is connected with the main controller 8, so that the main controller 8 can send signals to the test unit for controlling the test unit. The display 7 is connected with the main controller 8 for displaying various states in the underground shovel brake test control process.

[0047] The state unit is composed of a key switch 1, an engine controller 2, a gearbox controller 3, an engine throttle pedal 4, a brake pedal 5 and a test button 6. The signals of the components constituting the state unit directly enter the main controller 8. The main controller 8 processes the signals obtained by it and sends signals to the engine controller 2 and the gearbox controller 3 for controlling the engine and the gearbox state. In order to better detect the state of the underground shovel brake system, the main controller 8 will control the engine to be in the highest speed state and the gear of the gearbox to be in the second gear through the engine controller 2 and the gearbox controller 3. When the engine is at the highest speed, the engine power is the largest, and the traction of the equipment can reach the maximum through the torque increase of the hydraulic torque converter. The second gear of the gearbox is to ensure that the equipment has effective braking power. If the gearbox is in the first gear, the traction is too large, the braking force required is the largest, and the braking performance is required to be higher. If the braking force is too large, the speed of the vehicle will be reduced too fast, which is easy to cause harm to the operator. The braking force needs to be adjusted according to the weight of the equipment, which cannot be too large or too small.

[0048] The test unit comprises a first brake solenoid valve 9 and a second brake solenoid valve 10. The main controller 8 controls the energization and de-energization of the first brake solenoid valve 9 and the second brake solenoid valve 10 by sending signals to the first brake solenoid valve 9 and the second brake solenoid valve 10.

[0049] The protection logic set in the main controller 8 is that when the test button 6 is in the inactive state, the main controller will control the test unit, i.e. the first brake solenoid valve 9 and the second brake solenoid valve 10 cannot be activated, and the display 7 displays the information that the brake test needs to be performed.

[0050] When the test button 6 is pressed and is in the active state, the main controller 8 first controls the first brake solenoid valve 9 to maintain the energized state for 1 second and then de-energize. Then the main controller 8 controls the second brake solenoid valve 10 to maintain the energized state for 1 second and then de-energize. After the whole brake control system test is completed, the display 7 will display that the test is successful, and the related test information will be recorded.

[0051] Embodiment 2

[0052] As Figure 1As shown, the underground shovel brake test control system of the embodiment is a further improvement based on the previous embodiment. The main controller 8 is connected with the auxiliary controller 11, and the auxiliary controller 11 is connected with the radar unit. According to the detection signal of the radar unit, the main controller 8 and the auxiliary controller 11 are provided with corresponding protection logic.

[0053] Specifically, the auxiliary controller 11 is responsible for processing all signals sent by the radar unit. The auxiliary controller 11 sets the protection logic according to the size and distance of the obstacles detected by the radar unit. When the signal monitored by the radar unit reaches the set protection logic in the auxiliary controller 11, the signal is processed by the auxiliary controller 11, and then the processed signal is sent to the main controller 8. The main controller 8 controls the first brake proportional electromagnetic valve 9, the second brake proportional electromagnetic valve 10, the engine controller and the gearbox controller according to the set protection logic.

[0054] The radar unit includes a radar group front 12, a radar group rear 13, a radar group left 14 and a radar group right 15. Each group of radars includes 3-6 radar sensors, which are evenly distributed around the underground shovel. The radar group front 12 is located on the boom of the shovel to avoid false triggering of the protection logic set by the auxiliary controller 11. Therefore, a lifting sensor and a dumping sensor are added in the auxiliary controller 11 to avoid false judgments. The radar sensor is preferably a millimeter wave radar because the working environment of the underground shovel is complex, and the millimeter wave radar sensor can accurately monitor the obstacles within the set range in a complex construction environment.

[0055] The auxiliary controller 11 preferably sets three different levels of protection logic to process the radar unit signal. According to the different radar unit signals received, the auxiliary controller 11 can trigger different protection logics.

[0056] Protection logic one: the radar group front 12 and the radar group rear 13 monitor a distance of 2 meters, and the radar group left 14 and the radar group right 15 monitor a distance of 0.7 meters; protection logic two: the radar group front 12 and the radar group rear 13 monitor a distance of 1 meter, and the radar group left 14 and the radar group right 15 monitor a distance of 0.5 meters; protection logic three: the radar group front 12 and the radar group rear 13 monitor a distance of 0.5 meters, and the radar group left 14 and the radar group right 15 monitor a distance of 0.2 meters. The monitoring distance parameters can be optimized and adjusted according to the actual working conditions.

[0057] According to the three protection logics set by the auxiliary controller 11, the main controller 8 also sets three different levels of protection logics corresponding to the auxiliary controller 11.

[0058] Master controller 8 protection logic one: when the master controller 12 receives the protection logic 1 signal of the auxiliary controller 11, the display 7 will display an obstacle alarm signal to remind the operator, achieving the purpose of warning.

[0059] Master controller 8 protection logic two: when the master controller 8 receives the protection logic 2 signal of the auxiliary controller 11, the display 7 will display an obstacle alarm signal, and if the operator does not take corresponding measures, the master controller 8 will reduce the signal of the brake pedal 4 to 80% of the current state and reduce the signal of the accelerator pedal 5 to 80% of the current state.

[0060] Master controller 8 protection logic three: when the master controller 8 receives the protection logic 3 signal of the auxiliary controller 11, the display 7 will display an obstacle alarm signal, and if the operator does not take corresponding measures, the master controller 8 will reduce the signal of the brake pedal 4 to 50% of the current state, reduce the signal of the accelerator pedal 5 to 50% of the current state, and reduce the highest gear of the gearbox controller 6 to 2nd gear. The protection logic parameters can be optimized and adjusted according to the actual working conditions.

[0061] Embodiment 3

[0062] In combination Figure 2 and Figure 3 , the underground scraper brake test method of the embodiment comprises the following steps:

[0063] Step 1: start the brake test system of the underground scraper, and the starting process comprises S1-S3:

[0064] S1: turn on the key switch 1 to make it active, if the key switch is not activated, the signals of the state units cannot be obtained by the master control 8, and the underground scraper is in an unstarted state.

[0065] S2: step S1 is a prerequisite for triggering S2, when the key switch 1 is in the active state, the engine controller 2 and the gearbox controller 3 are started in turn, and at the same time, the engine accelerator pedal 4 and the brake pedal 5 are in the inactive state, and the signals of the components in S2 directly enter the master controller 8. In this step, the key switch 1 is activated, and this step naturally occurs.

[0066] S3: press the test button 6 to make it active. In this step, if the test button 1 is not pressed, the protection logic of the master controller 8 will be triggered, the master controller 8 is connected with the test unit and controls the test unit, specifically: the first brake proportional electromagnetic valve 9 and the second brake proportional electromagnetic valve 10 cannot be activated, the brake of the vehicle cannot be released, and the display 7 will display the information that the brake test needs to be performed.

[0067] By S1 to S3, it can be ensured that the driver needs to complete the two operations of turning on the key switch 1 and activating the test button 6 before operating the underground loader, and through the double insurance design, the operator must complete the brake test, fully guaranteeing the safety of the operation.

[0068] After the S1 to S3 steps are successfully completed, the main controller 8 sends signals to the engine controller 2 and the gearbox controller 3 for controlling the states of the engine and the gearbox according to the signals obtained by the main controller 8. In order to better test the brake test control system of the underground loader, the main controller 8 will make the engine controller 2 and the gearbox controller 3 control the engine to be in the highest speed state and the gearbox to be in the 2nd gear position, respectively.

[0069] After the first step is successfully completed, the second step S4 is entered, in which the main controller 8 controls the test unit including the first brake solenoid valve 9 and the second brake solenoid valve 10.

[0070] S4: The main controller 8 controls the first brake solenoid valve 9 to be powered first and then powered off, and then controls the second brake solenoid valve 10 to be powered first and then powered off.

[0071] After the second step is completed, the third step is performed, in which the display 7 outputs the test results, including S5:

[0072] S5: The signal of the main controller 8 enters the display 7, and the display 7 outputs the test results.

[0073] Embodiment 4

[0074] The underground loader of this embodiment is installed with the underground brake loader test control system of any one of the embodiments 1 and 2.

[0075] In combination Figure 3 and Figure 4 , the trigger logic of each component involved in the brake test control system installed on the underground loader of this embodiment is further described.

[0076] After the key switch 1, the engine controller 2 and the gearbox controller 3 are turned on in sequence and are in the activated state, and after the accelerator pedal 4 and the brake pedal 5 are in the silent state, i.e. in the inactivated state, and after the test button 6 is in the activated state, the brake test control system of the underground loader is activated. In this embodiment, if one of the key switch 1, the engine controller 2, the gearbox controller 3, the accelerator pedal 4, the brake pedal 5 and the test button 6 is not in the state described above, the brake test will not be activated.

[0077] After the brake test is activated, the first brake proportional solenoid valve 9 and the second brake proportional solenoid valve 10 will be tested in sequence to be powered on and powered off, and the display 7 will also display the test gear information and the test results.

[0078] The present application, before the operator operates the underground shovel to work, needs to open the key switch 1, presses the test button 2 two actions can complete the underground shovel brake system test, realizes the automatic test of underground shovel brake system, specially sets test button 2 as the necessary condition before shovel operation, makes shovel operation greatly avoid the problem of electromagnetic valve jam in the process of underground shovel operation, reduces the hidden danger of driving safety.

[0079] The above describes the present application and its embodiments in a schematic way, which is not limited, and the shown in the drawings is only one of the embodiments of the present application, and the actual structure is not limited thereto. Therefore, if the ordinary skilled in the art is inspired thereby, without departing from the purpose of the present application, without creative design, similar structure and embodiments to the technical solution, which shall belong to the protection scope of the present application.

Claims

1. A brake test control system for an underground scraper, comprising a display (7), a main controller (8), a status unit and a test unit, characterized in that: The main controller (8) is provided with protection logic, and the status unit is connected to the main controller (8), so that the signal of the status unit can directly enter the main controller (8); The state unit is composed of a key switch (1), an engine controller (2), a transmission controller (3), an engine accelerator pedal (4), a brake pedal (5) and a test button (6); The main controller (8) can directly send signals to the engine controller (2) and the transmission controller (3) in the state unit, so as to control the engine to be in the highest speed state and the transmission gear to be in the second gear; The test unit is connected to a main controller (8), and the main controller (8) can send a signal to the test unit for controlling the test unit; the test unit includes a first brake solenoid valve (9) and a second brake solenoid valve (10); the main controller (8) sends a signal to the first brake solenoid valve (9) and the second brake solenoid valve (10) to control the power-on and power-off conditions of the first brake solenoid valve (9) and the second brake solenoid valve (10); The display (7) is connected to the main controller (8) and is used to display various states during the brake test control process of the underground scraper; The brake test control system is configured such that: when the key switch (1) is in an activated state, the engine controller (2) and the transmission controller (3) are started in sequence, while the engine accelerator pedal (4) and the brake pedal (5) are in an inactivated state; and when the test button (6) is in an activated state, the first brake solenoid valve (9) and the second brake solenoid valve (10) can be activated.

2. The underground scraper brake test control system according to claim 1, characterized in that: The main controller (8) described in the test unit first controls the first brake solenoid valve (9) to maintain the power state for 1 second and then lose power, and then controls the second brake solenoid valve (10) to maintain the power state for 1 second and then lose power.

3. The underground scraper brake test control system according to claim 1, characterized in that: When the test button (6) is in an inactive state and the first brake solenoid valve (9) and the second brake solenoid valve (10) cannot be activated, the display (7) displays a message indicating that a brake test needs to be performed.

4. The underground scraper brake test control system according to claim 3, characterized in that: The main controller (8) is connected to the auxiliary controller (11), and the auxiliary controller (11) is connected to the radar unit. According to the detection signal of the radar unit, corresponding protection logic is set in the main controller (8) and the auxiliary controller (11).

5. The underground scraper brake test control system according to claim 4, characterized in that: The radar unit includes a front radar group (12), a rear radar group (13), a left radar group (14) and a right radar group (15). Each radar group includes 3-6 radar sensors, which are distributed around the underground scraper.

6. The underground scraper brake test control system according to claim 5, characterized in that: The radar sensor uses a millimeter wave radar.

7. An underground scraper brake test method of the underground scraper brake test control system according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Start the brake test system of the underground LHD. The startup process includes S1-S3: S1: Turn on the key switch (1) to activate it; S2: The engine controller (2) and the transmission controller (3) are started in sequence, while the engine accelerator pedal (4) and the brake pedal (5) are in an inactive state, and the signal of the status unit is directly input to the main controller (8); S3: Press the test button (6) to activate it; The main controller (8) sends a signal to the engine controller (2) and the transmission controller (3) according to the signal obtained in step S2, so as to control the state of the engine and the transmission; Step 2: The main controller (8) controls the test unit, including S4: S4: The test unit includes a first brake solenoid valve (9) and a second brake solenoid valve (10). The main controller (8) first controls the first brake solenoid valve (9) to be energized first and then de-energized, and then controls the second brake solenoid valve (10) to be energized first and then de-energized; Step 3: The display (7) outputs the test results, including S5: S5: The signal from the main controller (8) enters the display (7), and the display (7) outputs the test result.

8. An underground scraper, characterized in that: The underground scraper is equipped with the underground brake scraper test control system according to any one of claims 1 to 6.

Images