Control system and method for dormitory van expansion mechanism

Abstract

The embodiment of the invention discloses a control system and method for a dormitory van expansion mechanism, and the system comprises a main power contactor, an expansion mechanism control box which is connected with the main power contactor, a controller which is in communication connection with the expansion mechanism control box and the main power contactor, and at least one motor which is connected with the expansion mechanism control box. The controller is in communication connection with the expansion mechanism control box and the main power supply contactor; the controller detects the running state information of the boarding car, the power supply state information of the expansion mechanism and the state information of the expansion mechanism, and outputs a startup control signal to the expansion mechanism control box according to the running state information, the power supply state information and the state information of the expansion mechanism; and the expansion mechanism control box controls the expansion mechanism to stretch or retract according to the received control switch signal. Through the mode, the power consumption can be reduced, the rationality and reliability of the electric control system of the expansion mechanism are improved, and the safety of each working condition of the expansion mechanism is improved.

Description

Technical Field

[0001] An embodiment of the present invention relates to the technical field of camping vehicles, and particularly relates to a control system and method for a camping vehicle expansion mechanism. Background Art

[0002] A camping bus is a special vehicle for roads. It is both a transportation and passenger equipment and can also be used as a mobile barracks for sleeping and resting. Therefore, a camping bus needs to be configured and designed with cabins that can be widened to both sides of the vehicle. The technical route of the electric control expansion mechanism is a good solution for camping buses. However, the rationality and reliability of the expansion mechanism movement control have always been the control difficulties of the expansion mechanism electric control system. Summary of the Invention

[0003] In view of the above problems, an embodiment of the present invention provides a control system and method for a camping vehicle expansion mechanism, which overcomes or at least partially solves the above problems.

[0004] According to one aspect of an embodiment of the present invention, a control system for a camping vehicle expansion mechanism is provided, including: a main power contactor, an expansion mechanism control box connected to the main power contactor, a controller communicatively connected to the expansion mechanism control box and the main power contactor, and at least one motor connected to the expansion mechanism control box. The controller is communicatively connected to the expansion mechanism control box and the main power contactor; the controller detects the operating state information of the camping vehicle, the power supply state information of the expansion mechanism, and the state information of the expansion mechanism, and outputs a power-on control signal to the expansion mechanism control box according to the operating state information, the power supply state information, and the state information of the expansion mechanism. The expansion mechanism control box controls the expansion mechanism to extend or retract according to the received control switch signal.

[0005] Optionally, the operating state information includes whether the parking brake of the camping vehicle is in the parked state, whether the door is closed in place, whether the camping mode switch is turned on, and whether the speed of the camping vehicle is 0.

[0006] Optionally, the controller includes a first detection port connected to the camping vehicle for detecting whether the parking brake of the camping vehicle is in the parked state.

[0007] Optionally, the controller further includes a second detection port connected to the camping vehicle for detecting whether the door of the camping vehicle is closed in place.

[0008] Optionally, the controller further includes a third detection port connected to the camping vehicle for detecting whether the camping mode switch of the camping vehicle is turned on.

[0009] Optionally, the controller further includes a CAN communication interface for communicating with the camping vehicle to obtain the operation data of the camping vehicle.

[0010] Optionally, the controller further includes a power detection port connected to the main power contactor for detecting whether the main power contactor is engaged and in normal operating condition.

[0011] Optionally, the controller further includes: a fifth detection port, a sixth detection port, and a seventh detection port connected to the expansion mechanism control box, which are respectively used for detecting a first status signal indicating whether the expansion mechanism is in a working state, a second status signal indicating whether the expansion mechanism is fully retracted, and a third status signal indicating whether the expansion mechanism is fully extended.

[0012] Based on the same inventive concept, a control method for the expansion mechanism of a camping vehicle is also provided, including: detecting the operation status information of the camping vehicle and the status information of the expansion mechanism through a controller; outputting a power-on control signal according to the operation status information to control the main power contactor to supply power to the expansion mechanism, and receiving the power status information fed back by the main power contactor; determining whether the expansion mechanism of the camping vehicle meets the working conditions according to the operation status information, the power status information, and the status information of the expansion mechanism; if it is detected that the expansion mechanism meets the working conditions, outputting a startup control signal to the expansion mechanism control box to permit the expansion mechanism control box to control the operation of the expansion mechanism; otherwise, stopping outputting the startup control signal.

[0013] Optionally, the detecting, by the controller, the status information of the expansion mechanism of the camping vehicle includes: detecting whether the first status signal, the second status signal, and the third status signal of the expansion mechanism are valid through the controller, where the first status signal is used to indicate that the expansion mechanism is in a working state, the second status signal is used to indicate that the expansion mechanism is fully retracted, and the third status signal is used to indicate that the expansion mechanism is fully extended; if it is detected that the first status signal, the second status signal, and the third status signal are all invalid, it is determined that the expansion mechanism is partially extended and in a suspended state; if it is detected that the first status signal, the second status signal, and the third status signal are all valid, or the second status signal and the third status signal are both valid, it is determined that the position signal of the expansion mechanism is faulty; if it is detected that the first status signal is valid and one of the second status signal and the third status signal is valid, the position status of the expansion mechanism is identified.

[0014] The control system of the camping vehicle expansion mechanism according to the embodiment of the present invention includes a main power contactor, an expansion mechanism control box connected to the main power contactor, a controller communicatively connected to the expansion mechanism control box and the main power contactor, and at least one motor connected to the expansion mechanism control box. The controller is communicatively connected to the expansion mechanism control box and the main power contactor. The controller detects the operating state information of the camping vehicle, the power supply state information of the expansion mechanism, and the state information of the expansion mechanism, and outputs a startup control signal to the expansion mechanism control box according to the operating state information, the power supply state information, and the state information of the expansion mechanism. The expansion mechanism control box controls the expansion or retraction of the expansion mechanism according to the received control switch signal, which can reduce power consumption, improve the rationality and reliability of the electronic control system of the expansion mechanism, and improve the safety of each working condition of the expansion mechanism.

[0015] The above description is only an overview of the technical solution of the embodiment of the present invention. In order to be able to understand the technical means of the embodiment of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the embodiment of the present invention more obvious and understandable, the following specifically describes the specific implementation manners of the present invention. Brief Description of the Drawings

[0016] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0017] Figure 1 shows a schematic structural diagram of a control system of a camping vehicle expansion mechanism provided by an embodiment of the present invention;

[0018] Figure 2 shows a schematic diagram of the startup control process of the control system of the camping vehicle expansion mechanism provided by an embodiment of the present invention;

[0019] Figure 3 shows a schematic diagram of the state recognition process of the expansion mechanism of the control system of the camping vehicle expansion mechanism provided by an embodiment of the present invention;

[0020] Figure 4 shows a schematic diagram of the abnormal working condition recognition process of the control system of the camping vehicle expansion mechanism provided by an embodiment of the present invention;

[0021] Figure 5 shows a schematic diagram of the power-off control process of the control system of the camping vehicle expansion mechanism provided by an embodiment of the present invention;

[0022] Figure 6 shows a schematic diagram of the flow of a control method for a camping vehicle expansion mechanism provided by an embodiment of the present invention. Detailed implementation manners

[0023] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be completely conveyed to those skilled in the art.

[0024] Figure 1 The structural schematic diagram of the control system of the camping vehicle expansion mechanism provided by the embodiment of the present invention is shown. As Figure 1 shown, the control system of the camping vehicle expansion mechanism includes: a main power contactor 1, an expansion mechanism control box 2 connected to the main power contactor 1, a controller 3 communicatively connected to the expansion mechanism control box 2 and the main power contactor 1, and at least one motor M connected to the expansion mechanism control box 2, and the controller 3 is communicatively connected to the expansion mechanism control box 2 and the main power contactor 1; the controller 3 detects the operating state information of the camping vehicle, the power state information of the expansion mechanism, and the state information of the expansion mechanism, and outputs a power-on control signal to the expansion mechanism control box 2 according to the operating state information, the power state information, and the state information of the expansion mechanism, and the expansion mechanism control box 2 controls the expansion mechanism to extend or retract according to the received control switch signal.

[0025] In the embodiment of the present invention, the operating state information includes whether the parking brake of the camping vehicle is in the parked state, whether the door is closed in place, whether the camping mode switch is turned on, and whether the speed of the camping vehicle is 0. The controller 3 includes a first detection port S4 connected to the camping vehicle for detecting whether the parking brake of the camping vehicle is in the parked state. When the parking brake of the camping vehicle is in the parked state, the controller 3 receives the feedback parking state signal through the first detection port S4, and the parking state signal is valid at a low level, that is, when the parking state signal is at a low level, the parking brake of the camping vehicle is in the parked state. The controller 3 further includes a second detection port S5 connected to the camping vehicle for detecting whether the door of the camping vehicle is closed in place. When the door is not closed in place, the controller 3 receives the feedback door position state signal through the second detection port S5. The door position state signal is valid at a high level, that is, when the door position state signal is at a high level, it indicates that the door is open. The controller 3 further includes a third detection port S6 connected to the camping vehicle for detecting whether the camping mode switch of the camping vehicle is turned on. After the camping mode switch is turned on, the controller receives the feedback state signal that the vehicle is in the camping state through the third detection port S6, and the high level is valid.

[0026] The controller 3 further includes a CAN communication interface for communicating with the camping vehicle to obtain the operating data of the camping vehicle. The controller 3 receives the message information of the camping vehicle through the CAN communication interface, and after parsing the vehicle speed data from the message information, calculates the status value when the vehicle speed is 0. The controller 3 further includes a power detection port S7 connected to the main power contactor 1 for detecting whether the main power contactor is engaged and in normal working condition. After the main power contactor 1 is engaged and in normal working condition, the controller 3 receives the feedback normal working condition signal through the power detection port S7, with high level being valid.

[0027] The controller 3 further includes: a fifth detection port S1, a sixth detection port S2, and a seventh detection port S3 connected to the expansion mechanism control box 2, which are respectively used for detecting the first status signal indicating whether the expansion mechanism is in the working state, the second status signal indicating whether the expansion mechanism is retracted in place, and the third status signal indicating whether the expansion mechanism is extended in place.

[0028] In the embodiment of the present invention, if the controller 3 detects that the camping vehicle simultaneously satisfies that the camping mode switch is turned on, the parking brake is in the parked state, and the vehicle speed of the camping vehicle is 0, it is determined that the expansion mechanism of the camping vehicle meets the power-on condition. The controller 3 outputs a power-on control signal to the main power contactor 1.

[0029] In the embodiment of the present invention, a CAN communication module can also be added to the circuit board in the expansion mechanism control box 2 to perform CAN communication with the controller 3 according to the protocol, which can replace or control the expansion mechanism together with each signal line.

[0030] The startup control process of the expansion mechanism of the control system of the camping vehicle expansion mechanism in the embodiment of the present invention is as Figure 2 shown, including:

[0031] Step 100: Start.

[0032] Step 101: The controller stops outputting the startup control signal.

[0033] That is, the controller 3 is currently in the state of stopping outputting the startup control signal.

[0034] Step 102: Determine whether the power-on control signal is valid. If so, execute step 103; otherwise, return to execute step 101.

[0035] That is, it is determined whether the controller 3 normally outputs a high-level power-on control signal.

[0036] Step 103: Determine whether the feedback signal of the main power contactor is valid. If so, execute step 104; otherwise, repeat step 103.

[0037] That is, the controller 3 determines whether a high-level signal is received at the power detection port S7. If so, it indicates that the main power contactor 1 has been energized and the working condition is normal, and the power-on control signal is determined to be valid. Otherwise, the power-on control signal is invalid.

[0038] Step 104: Determine whether the door has been opened. If so, execute Step 105; otherwise, execute Step 106.

[0039] That is, the controller 3 determines whether a high-level signal is received at the second detection port S5. If so, it indicates that the door has been opened.

[0040] Step 105: The controller stops outputting the power-on control signal.

[0041] If the door is in the opened state, the controller stops outputting the power-on control signal, thus preventing the expansion mechanism from working when the vehicle is in the opened state and avoiding the occurrence of interference in the movement of the passenger door.

[0042] Step 106: Determine whether the power-on control signal lasts for the first duration. If so, execute Step 107; otherwise, return to execute 105.

[0043] Determine whether the power-on control signal output by the controller 3 lasts for the first duration. This first duration is at least not less than the action time for the main power contactor 1 to close, and can be specifically set as needed without limitation, preferably 10 s. If the duration of the power-on control signal is less than the first duration, it indicates that it is very likely a misoperation, and the controller 3 stops outputting the power-on control signal.

[0044] Step 107: The controller outputs the power-on control signal.

[0045] If all the above conditions are met, it indicates that the expansion mechanism control box 2 meets the working conditions, the controller 3 outputs the power-on control signal, and the expansion mechanism control box 2 can control the expansion mechanism according to this power-on control signal.

[0046] According to the control logic of the expansion mechanism power-on signal, it is necessary to simultaneously meet the conditions that the power-on control signal is valid for more than 10 s, the feedback signal of the main power contactor is normal, and the signal indicating that the passenger door is opened is invalid, and then the controller can output the power-on control signal, permitting the expansion mechanism control box to receive the switch signal k1 or k2 and control the expansion mechanism motor to work. Among them, the switch signal k1, after being input into the expansion mechanism control box 2, requests the expansion motor M to rotate forward to realize the extension of the expansion mechanism. The switch signal k2, after being input into the expansion mechanism control box 2, requests the expansion motor M to rotate in reverse to realize the retraction of the expansion mechanism. Both the switch signal k1 and the switch signal k2 are valid at high level.

[0047] In an embodiment of the present invention, detecting that the feedback signal of the main power contactor 1 is normal is one of the necessary conditions for the controller 3 to output a startup control signal and permit the expansion mechanism to operate. If the feedback signal of the main power contactor 1 is not detected, the controller 3 does not output a startup control signal or disconnects the already output startup control signal, and the expansion mechanism cannot or stops operating; then the controller 3 stops outputting a power-on control signal, shuts off the main power of the expansion mechanism, and the instrument displays a fault of the main power contactor 1. If it is detected that the signal fed back by the main power contactor 1 is abnormal, the controller 3 disconnects the output of the startup control signal and the expansion mechanism stops operating; then the controller 3 stops outputting a power-on control signal, shuts off the main power of the expansion mechanism, and the instrument displays a main power contactor fault.

[0048] In the camping mode, when the handbrake is pulled up and the vehicle speed data is 0 km / h at the same time, the controller 3 outputs a power-on control signal to make the main power contactor 1 close and supply power to the expansion mechanism control box 2. When it is detected that the feedback signal of the main power contactor 1 is normal, the power-on control signal has been continuously output for more than 10 seconds, and the passenger door is closed at the same time, the controller 3 can output a startup control signal to the expansion mechanism control box 2 to permit the expansion mechanism to execute each operation instruction. It can be seen that the logic of permitting the expansion mechanism to operate in the embodiment of the present invention is as follows: First, the conditions of the expansion mechanism power-on process need to be met to supply power to the expansion mechanism control box 2. Second, the conditions for permitting the expansion mechanism to start up should be met to input a startup instruction signal to the expansion mechanism control box 2. Only then can the control box be permitted to control the expansion mechanism motor M to operate after receiving the switch signal k1 or the switch signal k2, realizing the extension and retraction functions of the expansion mechanism.

[0049] During the process of the expansion mechanism control box controlling the expansion mechanism to operate, it is necessary to detect the state of the expansion mechanism to better control the expansion mechanism. The state recognition process of the expansion mechanism is as Figure 3 shown, including:

[0050] Step 200: Start.

[0051] Step 201: The controller continuously outputs a power-on control signal.

[0052] That is, the controller 3 is currently in a state of continuously outputting a power-on control signal.

[0053] Step 202: Determine whether the first status signal, the second status signal, and the third status signal are valid. If so, execute step 204; otherwise, execute step 203.

[0054] The first status signal is valid when it is at a high level, indicating that the expansion mechanism is in an operating state. The second status signal is valid when it is at a low level, indicating that the expansion mechanism is in place after retraction. The third status signal is valid when it is at a high level, indicating that the expansion mechanism is in place after extension.

[0055] Step 203: Determine that the extension mechanism extends partially and is in a paused state.

[0056] The first status signal, the second status signal, and the third status signal are all invalid simultaneously, indicating that the extension mechanism only extends partially and is not in a working state, that is, it is determined that the extension mechanism extends partially and is in a paused state.

[0057] Step 204: Determine whether the first status signal, the second status signal, and the third status signal are all valid. If so, execute Step 205; otherwise, execute Step 206.

[0058] Step 205: Determine that there is a fault in the extension mechanism position signal.

[0059] If the first status signal, the second status signal, and the third status signal are all valid simultaneously, it indicates that there is a fault in the extension mechanism position signal.

[0060] Step 206: Determine whether the second status signal and the third status signal are all valid. If so, execute Step 205; otherwise, execute Step 207.

[0061] The second status signal and the third status signal cannot be valid simultaneously. Therefore, if the second status signal and the third status signal are both valid, it can also be determined that there is a fault in the extension mechanism position signal.

[0062] Step 207: The first status signal, the second status signal, or the third status signal is valid.

[0063] That is, the first status signal is valid, and the second status signal or the third status signal is valid, indicating that the extension mechanism is performing a retraction action or an extension action.

[0064] Step 208: Identify the position status of the extension mechanism.

[0065] The first status signal is valid and the second status signal is valid, indicating that the extension mechanism has retracted in place. If the first status signal is valid and the third status signal is valid, it indicates that the extension mechanism has extended in place.

[0066] According to the extension mechanism status identification method of the embodiment of the present invention, after the power-on control signal is valid and the extension mechanism is powered on, three-way position and status signals of the extension mechanism are collected to identify and determine whether the extension mechanism is working, whether it has extended in place, whether it has retracted in place, or whether there is a fault in the position status signal, or whether the extension mechanism extends partially and is in a paused state. Through the accurate identification of the position and status information of the extension mechanism, it serves as a necessary control condition for the power management of the extension mechanism and preventing interference with the passenger door.

[0067] During the process of the expansion mechanism control box controlling the expansion mechanism, it is necessary to detect whether there is an abnormality in the control system of the camping vehicle expansion mechanism, so as to better control the expansion mechanism. The abnormal condition identification process of the control system of the camping vehicle expansion mechanism is as follows Figure 4 shown, including:

[0068] Step 300: Start.

[0069] Step 301: The controller outputs a power-on control signal.

[0070] That is, the controller 3 is currently in the state of outputting a power-on control signal.

[0071] Step 302: Determine whether the expansion mechanism position signal has an abnormal fault. If so, execute Step 303; otherwise, return to execute Step 305.

[0072] Specifically, judge whether the expansion mechanism position signal has an abnormal fault according to the method in Figure 3 .

[0073] Step 303: The instrument prompts that the expansion mechanism position signal has a fault.

[0074] If the expansion mechanism position signal has an abnormal fault, the instrument is used to prompt that the expansion mechanism position signal has a fault.

[0075] Step 304: The controller restricts the electric control operation of the door.

[0076] When the expansion mechanism position signal has a fault, the controller 3 restricts the electric control operation of the door, that is, restricts the door from opening.

[0077] Step 305: Determine whether the feedback signal of the main power contactor is valid. If so, execute Step 308; otherwise, return to execute Step 306.

[0078] The controller 3 detects whether the feedback signal of the main power contactor 1 is at a high level through the power detection port S7. If so, it means that the feedback signal of the main power contactor 1 is valid, and the main power contactor 1 has been attracted and the working condition is normal.

[0079] Step 306: The controller stops outputting the power-on control signal.

[0080] If the feedback signal of the main power contactor 1 is invalid, it means that the expansion mechanism control box 2 is not powered on, and the controller 3 stops outputting the power-on control signal.

[0081] Step 307: The instrument prompts that the main power contactor has a fault.

[0082] Step 308: The electric control conditions of the expansion mechanism are valid and can be operated normally.

[0083] If the feedback signal of the main power contactor 1 is valid, it indicates that the expansion mechanism control box 2 has been powered on, that is, the electrical control condition of the expansion mechanism is valid and normal operation can be performed.

[0084] Step 309: Determine whether the camping mode signal is valid. If it is, execute Step 312; otherwise, execute Step 310.

[0085] The controller 3 detects whether the camping mode signal is valid through the third detection port S6. If the third detection port S6 detects a high level, it indicates that the camping mode signal is valid. Otherwise, the camping mode signal is invalid.

[0086] Step 310: The controller stops outputting the power-on control signal.

[0087] If the camping mode signal is invalid, that is, the camping vehicle is not in the camping mode, the controller 3 stops outputting the power-on control signal.

[0088] Step 311: The controller stops outputting the power supply control signal.

[0089] After the controller 3 stops outputting the power-on control signal, it controls to stop outputting the power supply control signal, which can save electricity.

[0090] Step 312: The electrical control condition of the expansion mechanism is valid and normal operation can be performed.

[0091] If the camping mode signal is valid, that is, the camping vehicle is in the camping mode, the expansion mechanism can be controlled, that is, the electrical control condition of the expansion mechanism is valid and normal operation can be performed.

[0092] Step 313: Determine whether the parking signal is valid. If it is, execute Step 314; otherwise, return to execute Step 310.

[0093] The controller 3 detects whether the first detection port S4 is at a low level. If a low-level signal is detected through the first detection port S4, it indicates that the parking signal is valid and the camping vehicle is in the parked state. Otherwise, the parking signal is invalid.

[0094] Step 314: The electrical control condition of the expansion mechanism is valid and normal operation can be performed.

[0095] If the parking signal is valid and the camping vehicle is in the parked state, the expansion mechanism can be controlled, that is, the electrical control condition of the expansion mechanism is valid and normal operation can be performed.

[0096] Step 315: Determine whether the vehicle speed is 0. If it is, execute Step 316; otherwise, return to execute Step 310.

[0097] The controller 3 receives the message information through the CAN communication interface and then analyzes whether the vehicle speed is 0.

[0098] Step 316: The electric control condition of the expansion mechanism is valid and it can be operated normally.

[0099] If the vehicle speed is 0, it indicates that the camping vehicle is not in a driving state and camping operations can be performed, that is, the electric control condition of the expansion mechanism is valid and it can be operated normally.

[0100] Step 317: Determine whether the door is open. If so, execute Step 318; otherwise, return to execute Step 319.

[0101] The controller 3 detects whether a high-level signal is received at the second detection port S5. If so, it indicates that the door is open. Otherwise, it indicates that the door is in a closed state.

[0102] Step 318: The controller stops outputting the power-on control signal.

[0103] If the door is open, it indicates that the expansion mechanism cannot be operated at this time, and the controller stops outputting the power-on control signal.

[0104] Step 319: The electric control condition of the expansion mechanism is valid and it can be operated normally.

[0105] If the door is not open, the expansion mechanism can be operated, and the electric control condition of the expansion mechanism is valid and it can be operated normally.

[0106] For the identification and control of abnormal operating conditions of the control system of the camping vehicle expansion mechanism according to the embodiment of the present invention, there are a total of 6 types of abnormal operating condition identifications. One of them is the abnormal identification of the expansion mechanism position signal. The controller 3 does not control the expansion mechanism to stop, but only sends a message restricting the operation of the passenger door and displays the information of this fault on the instrument. After the other 5 types of abnormal operating condition identifications are determined, the controller 3 stops outputting the power-on control signal and controls the expansion mechanism to stop. Among them, when the camping mode signal is abnormally invalid, the parking signal is abnormally invalid, and the vehicle speed data is abnormally not 0, after the expansion mechanism is controlled to stop for these 3 types of abnormal operating conditions, the controller 3 then stops outputting the power-on control signal and controls the expansion mechanism to power off; when the feedback signal of the main power contactor 1 is abnormally effective and the door open signal is abnormally effective, for these 2 types of abnormal operating conditions, after the expansion mechanism is controlled to stop, the controller 3 does not control the expansion mechanism to power off.

[0107] When the operation of the expansion mechanism is completed or an abnormality occurs, it may be necessary to perform a timely power-off operation on the expansion mechanism to save electricity. The power-off control process of the control system of the camping vehicle expansion mechanism according to the embodiment of the present invention is as Figure 5 shown, including:

[0108] Step 400: Start.

[0109] Step 401: The controller outputs a power-on control signal.

[0110] That is, the controller 3 is currently in a state of outputting a power-on control signal.

[0111] Step 402: Determine whether to output a power-on control signal. If so, execute Step 405; otherwise, execute Step 403.

[0112] That is, the controller 3 detects whether the expansion mechanism control box meets the working conditions. If it meets the working conditions, it outputs a power-on control signal. Otherwise, it stops outputting the power-on control signal.

[0113] Step 403: Determine whether to continue for a second duration.

[0114] Determine whether the controller 3 has no power-on control signal output for a second duration. The second duration can be set as needed, preferably 30 min.

[0115] Step 404: The controller stops outputting the power-on control signal.

[0116] If the controller 3 has no power-on control signal output for a second duration, the controller 3 stops outputting the power-on control signal.

[0117] Step 405: Determine whether the second status signal or the third status signal is valid. If so, execute Step 408; otherwise, execute Step 406.

[0118] The second status signal is valid when it is at a low level, indicating that the expansion mechanism has retracted in place. The third status signal is valid when it is at a high level, indicating that the expansion mechanism has extended in place.

[0119] Step 406: Determine whether the first status signal is invalid. If so, execute Step 407.

[0120] If both the second status signal and the third status signal are invalid, further determine whether the first status signal is invalid.

[0121] Step 407: The instrument displays a position signal fault.

[0122] If the first status signal, the second status signal, and the third status signal are all invalid, it indicates that the expansion mechanism has only extended partially and is not in a working state, that is, it is determined that the expansion mechanism has extended partially and is in a paused state, and the instrument is used to display a position signal fault.

[0123] Step 408: Determine whether to continue for a third duration. If so, execute Step 409.

[0124] Determine whether the second status signal or the third status signal is valid and whether it continues for a third duration. The third duration can be set as needed and is not specifically limited, preferably 30 min.

[0125] Step 409: The controller stops outputting the power-on control signal.

[0126] If the second status signal or the third status signal is valid and lasts for the third duration, it indicates that the expansion mechanism has not been working for a long time and there is no operation requirement, and the controller 3 stops outputting the start control signal.

[0127] Step 410: The controller stops outputting the power-on control signal.

[0128] After the controller 3 stops outputting the start control signal, it stops outputting the power-on control signal to cut off the power of the expansion mechanism for energy conservation.

[0129] In the embodiment of the present invention, when the following two conditions are met, the controller 3 turns off the total power supply of the expansion mechanism to save electric energy. One is that there is no start control signal for more than 30 minutes, and it is determined that the expansion mechanism cannot start and work, and the power is cut off for energy conservation; the other is that the expansion mechanism extends in place or retracts in place and lasts for more than 30 minutes effectively, and it is determined that the expansion mechanism has no operation requirement and the power is cut off for energy conservation.

[0130] In the embodiment of the present invention, when it is detected that the expansion mechanism is not fully retracted (judged by the second status signal), the controller 3 sends CAN communication data to control the lower passenger door not to open or close. When it is detected that the expansion mechanism is running (judged by the first status signal), the controller 3 sends CAN communication data to control the voice alarm to issue a warning that the expansion mechanism is working; at the same time, it controls 8 warning lights on the expansion mechanism to flash. When the running signal disappears and the expansion mechanism is not fully retracted, the warning lights are always on until they go out after retracting in place. When it is detected that the expansion mechanism extends in place (judged by the third status signal), the controller 3 sends CAN communication data and the instrument displays the identification symbol of the extended expansion mechanism. When it is detected that the first status signal or the third status signal output by the expansion mechanism is valid, the controller 3 sends a torque of 0 according to the engine protocol TSC1VE to achieve the forced idle condition of the engine. When the expansion mechanism extends manual switch signal is detected (judged by the switch signal k1), if the start control signal is valid at the same time, the expansion mechanism control box 2 outputs positive and negative power to the motor M to control the motor to rotate forward to realize the electric extension of the expansion mechanism. When the expansion mechanism retracts manual switch signal is detected (judged by the switch signal k2), if the start control signal is valid at the same time, the expansion mechanism control box 2 outputs negative and positive power to the motor M to control the motor to rotate backward to realize the electric retraction of the expansion mechanism.

[0131] When the camping vehicle is in the camping mode, it is one of the necessary conditions for the controller 3 to output a power-on control signal and control the power-on of the expansion mechanism. At this time, the controller 3 sends CAN communication data, and the instrument continuously prompts that the vehicle is prohibited from moving! If the handbrake is not detected at this time, the instrument prompts the driver to tighten the handbrake. When it is also recognized and determined that the expansion mechanism is not retracted in place, the engine should be controlled to run at forced idle speed. In the camping mode, when the second status signal is not recognized and it is determined that the expansion mechanism cannot be retracted in place, the opening of the passenger door is prohibited. In the camping mode, when the second status signal is recognized and it is determined that the expansion mechanism is retracted in place, a control signal for closing the passenger door is automatically sent to prevent movement interference between the expansion mechanism and the passenger door.

[0132] From the perspectives of improving the reliability of the electronic control system of the expansion mechanism, reducing power consumption, and preventing movement interference with the passenger door, the control system of the expansion mechanism of the camping vehicle in the embodiment of the present invention can effectively avoid the occurrence of working conditions such as movement interference and abnormal out-of-control between the expansion mechanism and the passenger door by controlling and managing the main power supply of the expansion mechanism and the permission start control signal. In the main power contactor 1, a function for detecting and feedbacking the working state of the contactor is designed, and combined with other signals, comprehensive control is performed in the start control process and the abnormal working condition identification control process of the expansion mechanism, which can prevent the uncontrollability of the electronic control system of the expansion mechanism when the main power contactor 1 is out of control or the main power contactor 1 is stuck. If it is detected that the contacts of the main power contactor 1 are abnormally stuck, the electronic control system can stop outputting the start control signal according to the signal detected and feedbacked by the state of the main power contactor 1, realize the shutdown of the expansion mechanism, and at the same time the instrument prompts a fault of the main power contactor 1. The embodiment of the present invention has a recognition method for 5 abnormal working conditions, including abnormal recognition of the expansion mechanism position signal, abnormal recognition of the camping mode signal, abnormal recognition of the parking signal, abnormal recognition of the vehicle speed data, and abnormal recognition of the feedback signal of the main power contactor 1. The control strategies for different abnormal working conditions are also different. Some only control the shutdown of the expansion mechanism and display abnormal information, and some need to control the disconnection of the main power supply after controlling the shutdown of the expansion mechanism and prompt to check for abnormal faults. The recognition and judgment of the passenger door status signal in the embodiment of the present invention, combined with the recognition and judgment of the expansion mechanism position and status signals, prevent movement interference between the passenger door and the expansion mechanism and restrict the operation of the passenger door. Such as recognizing and determining whether the expansion mechanism is working, whether it extends in place, whether it retracts in place, whether the position status signal is abnormally faulty, or the expansion mechanism is partially extended and in a paused state, etc. Through the restriction of the passenger door and the start-up and power-on / off control of the electronic control system of the expansion mechanism, the function of preventing movement interference of the expansion mechanism is realized. The embodiment of the present invention controls the electronic control system of the expansion mechanism from multiple aspects such as the electrical control principle, control logic, main power supply management, dual-signal permission control, abnormal working condition and movement interference recognition of the expansion mechanism of the camping bus, which can reduce power consumption, improve the rationality and reliability of the electronic control system of the expansion mechanism, and improve the safety of each working condition of the expansion mechanism through audible and visual warnings and anti-movement interference control during the operation of the expansion mechanism.

[0133] In summary, the control system of the expansion mechanism of the camping vehicle according to the embodiments of the present invention includes: a main power contactor, an expansion mechanism control box connected to the main power contactor, a controller communicatively connected to the expansion mechanism control box and the main power contactor, and at least one motor connected to the expansion mechanism control box, and the controller is communicatively connected to the expansion mechanism control box and the main power contactor; the controller detects the operating state information of the camping vehicle, the power supply state information of the expansion mechanism, and the state information of the expansion mechanism, and outputs a power-on control signal to the expansion mechanism control box according to the operating state information, the power supply state information, and the state information of the expansion mechanism, and the expansion mechanism control box controls the expansion mechanism to extend or retract according to the received control switch signal, which can reduce power consumption, improve the rationality and reliability of the electronic control system of the expansion mechanism, and improve the safety of each working condition of the expansion mechanism.

[0134] Based on the same concept, the embodiments of the present invention also provide a control method for the expansion mechanism of a camping vehicle. As Figure 6 shown, the control method for the expansion mechanism of the camping vehicle includes:

[0135] Step S11: Detect the operating state information of the camping vehicle and the state information of the expansion mechanism through a controller.

[0136] The operating state information includes whether the parking brake of the camping vehicle is in the parked state, whether the door is closed in place, whether the camping mode switch is turned on, and whether the speed of the camping vehicle is 0.

[0137] Detect whether the first state signal, the second state signal, and the third state signal of the expansion mechanism are valid through the controller, where the first state signal is used to indicate that the expansion mechanism is in the working state, the second state signal is used to indicate that the expansion mechanism is retracted in place, and the third state is used to indicate that the expansion mechanism is extended in place.

[0138] If it is detected that the first state signal, the second state signal, and the third state signal are all invalid at the same time, it is determined that the expansion mechanism is partially extended and in a suspended state.

[0139] If it is detected that the first state signal, the second state signal, and the third state signal are all valid at the same time, or the second state signal and the third state signal are both valid at the same time, it is determined that the position signal of the expansion mechanism fails.

[0140] If it is detected that the first state signal is valid and one of the second state signal and the third state signal is valid, the position state of the expansion mechanism is identified.

[0141] Step S12: Output a power-on control signal according to the operating status information to control the main power contactor to supply power to the expansion mechanism, and receive the power status information fed back by the main power contactor.

[0142] If the controller 3 detects that the campervan simultaneously satisfies the conditions that the camping mode switch is turned on, the parking brake is tightened and in the parked state, and the speed of the campervan is 0, it is determined that the expansion mechanism of the campervan meets the power-on conditions. The controller 3 outputs a power-on control signal to the main power contactor 1. After receiving the power-on control signal, the main power contactor performs a closing operation and feeds back the power status information. The controller receives the power status information fed back by the main power contactor.

[0143] Step S13: Determine whether the expansion mechanism of the campervan meets the working conditions according to the operating status information, the power status information, and the status information of the expansion mechanism.

[0144] If the power-on control signal is valid, the feedback signal of the main power contactor is valid, the door is not opened, and the power-on control signal lasts for the first duration, it indicates whether the expansion mechanism of the campervan meets the working conditions. The first duration can be set as needed, preferably 10s.

[0145] Step S14: If it is detected that the expansion mechanism meets the working conditions, output a startup control signal to the expansion mechanism control box to permit the expansion mechanism control box to control the operation of the expansion mechanism; otherwise, stop outputting the startup control signal.

[0146] If it is detected that the expansion mechanism meets the working conditions, the controller outputs a startup control signal to the expansion mechanism control box to permit the expansion mechanism control box to control the operation of the expansion mechanism. After receiving the startup control signal, if the expansion mechanism extends manual switch signal k1 is detected, the expansion mechanism control box 2 outputs positive and negative power to the motor M to control the motor to rotate forward, realizing the electric extension of the expansion mechanism. If the expansion mechanism retracts manual switch signal k2 is detected, the expansion mechanism control box 2 outputs negative and positive power to the motor M to control the motor to rotate in reverse, realizing the electric retraction of the expansion mechanism.

[0147] The specific embodiments of the present invention have been described above. In some cases, the actions or steps recorded in the embodiments of the present invention can be executed in a different order from that in the embodiments and still achieve the desired results. Additionally, the processes depicted in the drawings do not necessarily require the specific order or consecutive order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0148] The method of the above embodiment is applied to the corresponding system in the foregoing embodiment and has the beneficial effects of the corresponding system embodiment, which will not be elaborated here.

[0149] Those of ordinary skill in the art should understand that any discussion of the above embodiments is merely exemplary and is not intended to imply that the scope of the present disclosure is limited to these examples; under the concept of the present disclosure, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the embodiments of the present invention as described above, and they are not provided in detail for the sake of brevity.

[0150] This application is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of all embodiments. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of the present invention shall be included within the protection scope of the present disclosure.

Claims

1. A control system for a camping vehicle expansion mechanism, characterized in that, The control system includes: a main power contactor, an expansion mechanism control box connected to the main power contactor, a controller communicatively connected to the expansion mechanism control box and the main power contactor, and at least one motor connected to the expansion mechanism control box. The controller is communicatively connected to the expansion mechanism control box and the main power contactor. The controller detects the operating state information of the camping vehicle, the power supply state information of the expansion mechanism, and the state information of the expansion mechanism, and outputs a power-on control signal to the expansion mechanism control box according to the operating state information, the power supply state information, and the state information of the expansion mechanism. The expansion mechanism control box controls the expansion mechanism to extend or retract according to the received control switch signal.

2. The control system according to claim 1, wherein The operating state information includes whether the parking brake of the camping vehicle is in the parked state, whether the door is closed in place, whether the camping mode switch is turned on, and whether the speed of the camping vehicle is 0.

3. The control system according to claim 2, wherein The controller includes a first detection port connected to the camping vehicle, which is used to detect whether the parking brake of the camping vehicle is in the parked state.

4. The control system according to claim 2, characterized in that, The controller further includes a second detection port connected to the camping vehicle, which is used to detect whether the door of the camping vehicle is closed in place.

5. The control system according to claim 2, characterized in that, The controller further includes a third detection port connected to the camping vehicle, which is used to detect whether the camping mode switch of the camping vehicle is turned on.

6. The control system according to claim 2, wherein The controller further includes a CAN communication interface, which is used to communicate with the camping vehicle to obtain the operation data of the camping vehicle.

7. The control system according to claim 1, wherein The controller further includes a power supply detection port connected to the main power contactor, which is used to detect whether the main power contactor has been attracted and the working condition is normal.

8. The control system according to claim 1, characterized in that, The controller further includes: a fifth detection port, a sixth detection port, and a seventh detection port connected to the expansion mechanism control box, which are respectively used to detect a first state signal indicating whether the expansion mechanism is in a working state, a second state signal indicating whether the expansion mechanism is retracted in place, and a third state signal indicating whether the expansion mechanism is extended in place.

9. A control method for a camping vehicle expansion mechanism, characterized in that, The control method includes: Detecting the operating state information of the camping vehicle and the state information of the expansion mechanism through the controller; Outputting a power-on control signal according to the operating state information to control the main power contactor to supply power to the expansion mechanism, and receiving the power supply state information fed back by the main power contactor; Determining whether the expansion mechanism of the camping vehicle meets the working conditions according to the operating state information, the power supply state information, and the state information of the expansion mechanism; If it is detected that the expansion mechanism meets the working conditions, output a power-on control signal to the expansion mechanism control box to permit the expansion mechanism control box to control the expansion mechanism to work; otherwise, stop outputting the power-on control signal.

10. The control method according to claim 9, wherein The detecting the state information of the expansion mechanism of the camping vehicle through the controller includes: Detecting whether the first state signal, the second state signal, and the third state signal of the expansion mechanism are valid through the controller, where the first state signal is used to indicate that the expansion mechanism is in a working state, the second state signal is used to indicate that the expansion mechanism is retracted in place, and the third state is used to indicate that the expansion mechanism is extended in place; If it is detected that the first status signal, the second status signal, and the third status signal are all invalid at the same time, it is determined that the expansion mechanism is partially extended and in a suspended state; If it is detected that the first status signal, the second status signal, and the third status signal are all valid at the same time, or the second status signal and the third status signal are both valid at the same time, it is determined that there is a fault in the position signal of the expansion mechanism; If it is detected that the first status signal is valid and one of the second status signal and the third status signal is valid, the position status of the expansion mechanism is identified.

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