CAN bus resistance control system and rotary drilling rig

Abstract

The utility model provides a CAN bus resistance control system and a rotary drilling rig, and relates to the technical field of vehicles. The CAN bus resistance control system comprises a CAN bus resistance loop, the CAN bus resistance loop comprises a first resistor, a second resistor, a third resistor and a resistance relay, after the second resistor and the resistance relay are connected in series, a series combination is connected with the first resistor and the third resistor in parallel, the first resistor is arranged at a first farthest terminal of a whole machine CAN bus framework, and the second resistor is arranged at a second farthest terminal of the whole machine CAN bus framework. The third resistor is arranged at a second farthest terminal of the complete machine CAN bus architecture, the second resistor is arranged at a third farthest terminal of the chassis CAN bus architecture, and the resistance relay is used for controlling the second resistor to be connected or disconnected. According to the application, under different operation states of the ultra-large heavy equipment, the connection or disconnection of the second resistor is controlled through the resistance relay, so that the resistance of the whole CAN bus loop is stabilized at about 60 omega, manual adjustment of the CAN bus architecture is not needed, the operation convenience is improved, and normal communication of the CAN bus can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a CAN bus resistance control system and a rotary drilling rig. BACKGROUND

[0002] At present, a controller area network (CAN) controller is configured in a super large heavy equipment such as a rotary drilling rig, information interaction is performed between each electrical module in the super large heavy equipment through a CAN bus, which can improve the intelligent degree of the super large heavy equipment, and meanwhile, the transmission of signals is accelerated.

[0003] In the related art, one resistance is arranged at each of two farthest terminals of a whole machine CAN bus architecture of the super large heavy equipment, so that the whole CAN bus loop resistance is stable to ensure normal CAN bus communication. However, the CAN bus architecture mode has a problem of CAN bus operation failure in some scenarios. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a CAN bus resistance control system and a rotary drilling rig, to solve the problem of CAN bus operation failure of the CAN bus architecture mode in some scenarios in the related art.

[0005] In a first aspect, the present application provides a CAN bus resistance control system, comprising: a CAN bus resistance loop; the CAN bus resistance loop comprises a first resistance, a second resistance, a third resistance and a resistance relay, the second resistance and the resistance relay are connected in series, and the series combination is connected in parallel with the first resistance and the third resistance; the first resistance is arranged at a first farthest terminal of a whole machine CAN bus architecture, and the third resistance is arranged at a second farthest terminal of the whole machine CAN bus architecture; the second resistance is arranged at a third farthest terminal of a chassis CAN bus architecture; and the resistance relay is used for controlling access or disconnection of the second resistance.

[0006] In a possible implementation manner, the CAN bus resistance control system further comprises: a power module in communication connection with the resistance relay, the power module is used for controlling turn-on or turn-off of a power supply, and the power supply is used for supplying power to the resistance relay.

[0007] In a possible implementation manner, the CAN bus resistance control system further comprises: a CAN bus detection module in communication connection with the CAN bus resistance loop, and the CAN bus detection module is used for detecting a resistance value between a CAN high bit data line and a CAN low bit data line.

[0008] In a possible implementation, the CAN bus resistance control system further comprises a programmable controller in communication connection with the CAN bus resistance loop, and the programmable controller is configured to detect the upper-mounted winch signal and generate a control signal according to a detection result.

[0009] In a possible implementation, the programmable controller is further configured to send the control signal to the power supply module, so that the power supply module controls the power supply to be turned on or turned off according to the control signal.

[0010] In a possible implementation, the CAN bus resistance control system further comprises a display screen in communication connection with the CAN bus resistance loop, and the display screen is configured to display the resistance value between the first CAN bus and the second CAN bus.

[0011] In a possible implementation, the display screen is further configured to display an alarm prompt information, and the alarm prompt information is configured to prompt a CAN bus resistance fault.

[0012] In a possible implementation, the first resistance, the second resistance and the third resistance have the same resistance value, and the resistance value is 120Ω.

[0013] In a possible implementation, the CAN bus resistance control system further comprises a connector, and the connector is configured to control the connection or disconnection of the first farthest terminal and the second farthest terminal.

[0014] In a second aspect, the present application provides a rotary drilling rig, comprising a rotary drilling rig body and the CAN bus resistance control system provided in the first aspect.

[0015] The CAN bus resistance control system and the rotary drilling rig provided in the present application comprise a CAN bus resistance loop, the CAN bus resistance loop comprises a first resistance, a second resistance, a third resistance and a resistance relay, the second resistance and the resistance relay are connected in series, and the series combination is connected in parallel with the first resistance and the third resistance, wherein the first resistance is arranged at a first farthest terminal of a whole-machine CAN bus architecture, the third resistance is arranged at a second farthest terminal of the whole-machine CAN bus architecture, the second resistance is arranged at a third farthest terminal of a chassis CAN bus architecture, and the resistance relay is configured to control the connection or disconnection of the second resistance. In the present application, the first resistance is arranged at the first farthest terminal of the whole-machine CAN bus architecture, the third resistance is arranged at the second farthest terminal of the whole-machine CAN bus architecture, the second resistance is arranged at the third farthest terminal of the chassis CAN bus architecture, and the connection or disconnection of the second resistance is controlled by the resistance relay under different operating states of the super-large heavy equipment, so that the whole CAN bus loop resistance is stabilized at about 60Ω, manual adjustment of the CAN bus architecture is not needed, the operation convenience is improved, and the CAN bus communication can be realized normally. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0017] Figure 1 A schematic diagram of the CAN bus resistance control system provided in the embodiments of this application. Figure One ;

[0018] Figure 2 A schematic diagram of the CAN bus resistance control system provided in the embodiments of this application. Figure Two .

[0019] Explanation of reference numerals in the attached figures:

[0020] 110: CAN bus resistor loop;

[0021] 101: First resistor;

[0022] 102: Second resistor;

[0023] 103: Third resistor;

[0024] 104: Resistive relay;

[0025] 120: CAN bus detection module;

[0026] 130: Display screen;

[0027] 140: Central control unit;

[0028] 150: Programmable Logic Controller;

[0029] 160: VCU;

[0030] 170: Power module;

[0031] 180: Power supply;

[0032] 190: Connector;

[0033] 200: Centralized lubrication system;

[0034] 210: Mast tilt sensor;

[0035] 21: CAN high-level data line;

[0036] 22: CAN low-order data line.

[0037] The specific embodiments of the application have been shown by way of example in the above figures, and will be described in greater detail below. These figures and this written description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate the inventive concept to one of ordinary skill in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0038] Exemplary embodiments will be described in detail with reference to the drawings, of which like reference numerals indicate like elements. The following detailed description is not intended to limit the application, as claimed, in any way. Rather, it is described in such detail to disclose embodiments of the application in a manner that is thorough and complete enough to allow others skilled in the art to practice the application, as claimed, and to enable others skilled in the art to make and use the application, as claimed.

[0039] As an important equipment for drilling a super-large diameter hole, the rotary drilling rig has the advantages of large drilling power, large output torque and axial pressure, flexible operation, and high construction efficiency. In the related art, in order to ensure normal CAN bus communication, a super-large heavy equipment such as a rotary drilling rig follows the principle of arranging two 120Ω resistors, that is, a 120Ω resistor is connected in series between a CAN high data line and a CAN low data line at a cab of a CAN bus architecture of the super-large heavy equipment in a whole machine state, and a 120Ω resistor is connected in series between the CAN high data line and the CAN low data line at a mast of the CAN bus architecture of the super-large heavy equipment in the whole machine state, so that the whole CAN bus loop resistance is stabilized at about 60Ω.

[0040] However, in the CAN bus architecture mode, the chassis and the superstructure of the super-large heavy equipment need to be split, that is, when the super-large heavy equipment is in a chassis running state, a 120Ω resistor needs to be manually connected outside the most remote terminal electric control cabinet of the chassis CAN bus loop in order to stabilize the whole CAN bus loop resistance at about 60Ω; when the chassis and the superstructure of the super-large heavy equipment are not split, that is, when the super-large heavy equipment is in a whole machine running state, the manually connected 120Ω resistor at the electric control cabinet needs to be removed, which is complicated to operate. In the actual application process, the manually connected and removed resistor is easy to be forgotten, which affects the running state of the whole vehicle and the chassis, and is easy to cause CAN bus running failure. Therefore, the resistance arrangement and control mode of the CAN bus loop have certain limitations, and need to be further improved to improve the adaptability of the CAN bus loop.

[0041] Based on the problems in the related art, the embodiment of the present application arranges a first resistor at a first farthest terminal of a whole machine CAN bus architecture, arranges a third resistor at a second farthest terminal of the whole machine CAN bus architecture, arranges a second resistor at a third farthest terminal of a chassis CAN bus architecture, and controls the access or disconnection of the second resistor through a resistor relay under different operating states of the super-large heavy equipment, so that the whole CAN bus loop resistance is stabilized at about 60Ω, without manual adjustment of the CAN bus architecture, improving the operation convenience, and meanwhile, the CAN bus communication can be realized normally.

[0042] Firstly, the application scenarios of the embodiment of the present application are described below.

[0043] The CAN bus resistance control system provided by the embodiment of the present application is applicable to super-large heavy equipment such as rotary drilling rigs.

[0044] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems are described in detail below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described again in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0045] Figure 1 The structure of the CAN bus resistance control system provided by the embodiment of the present application is shown in Figure One . As shown in Figure 1 , the CAN bus resistance control system 10 includes a CAN bus resistance loop 110, which includes a first resistor 101, a second resistor 102, a third resistor 103, and a resistor relay 104.

[0046] The second resistor and the resistor relay are connected in series, and the series combination is connected in parallel with the first resistor and the third resistor.

[0047] The first resistor is arranged at a first farthest terminal of a whole machine CAN bus architecture, and the third resistor is arranged at a second farthest terminal of the whole machine CAN bus architecture. The second resistor is arranged at a third farthest terminal of a chassis CAN bus architecture. The resistor relay is used to control the access or disconnection of the second resistor.

[0048] For example, the first farthest terminal can be a cab of the super-large heavy equipment, the second farthest terminal can be an upper part of the super-large heavy equipment, and the third farthest terminal can be an electric control cabinet of a chassis of the super-large heavy equipment.

[0049] For example, the first resistor is arranged at the cab of the super-large heavy equipment, the second resistor and the resistor relay are arranged in the electric control cabinet of the chassis of the super-large heavy equipment, and the third resistor is arranged at a mast of the upper part of the super-large heavy equipment.

[0050] Exemplarily, the embodiment of the present application does not limit the type, structure principle and specific installation position of the resistance relay, and is determined according to actual application requirements, as long as the resistance relay can control the access or disconnection of the second resistance.

[0051] Exemplarily, the wire harness for connecting the first resistance, the second resistance, the third resistance and the resistance relay can be a CAN high-bit data line and a CAN low-bit data line.

[0052] Exemplarily, the first end of the first resistance, the first end of the second resistance and the first end of the third resistance can be connected through the CAN high-bit data line, the second end of the first resistance, the second end of the resistance relay and the second end of the third resistance can be connected through the CAN low-bit data line, and the second end of the second resistance and the first end of the resistance relay can be connected through the CAN high-bit data line or the CAN low-bit data line.

[0053] Exemplarily, when the contact of the resistance relay is closed, the second resistance accesses the CAN bus resistance loop, and when the contact of the resistance relay is disconnected, the second resistance is disconnected from the CAN bus resistance loop.

[0054] The CAN bus resistance control system provided by the embodiment of the present application comprises a CAN bus resistance loop, the CAN bus resistance loop comprises a first resistance, a second resistance, a third resistance and a resistance relay, the second resistance and the resistance relay are connected in series, and the series combination is connected in parallel with the first resistance and the third resistance, wherein the first resistance is arranged at a first farthest terminal of a whole machine CAN bus architecture, the third resistance is arranged at a second farthest terminal of the whole machine CAN bus architecture, the second resistance is arranged at a third farthest terminal of a chassis CAN bus architecture, and the resistance relay is used for controlling access or disconnection of the second resistance. In the embodiment of the present application, the first resistance is arranged at the first farthest terminal of the whole machine CAN bus architecture, the third resistance is arranged at the second farthest terminal of the whole machine CAN bus architecture, and the second resistance is arranged at the third farthest terminal of the chassis CAN bus architecture, and the access or disconnection of the second resistance is controlled by the resistance relay under different operating states of the super-large heavy equipment, so that the whole CAN bus loop resistance is stabilized at about 60Ω, manual adjustment of the CAN bus architecture is not needed, the operation convenience is improved, and the CAN bus communication can be realized normally.

[0055] Optionally, the CAN bus resistance control system provided by the embodiment of the present application further comprises a power module in communication connection with the resistance relay. The power module is used for controlling the connection or disconnection of a power supply, and the power supply is used for supplying power to the resistance relay.

[0056] Exemplarily, the power module can be arranged at the chassis of the super-large heavy equipment.

[0057] The number of power supply modules can be at least one. The number of power supply modules and the specific installation position are not limited in the embodiments of the present application, and can be determined according to actual application requirements.

[0058] The power supply can be a 24V power supply.

[0059] The power supply is used to supply power to the coil in the resistance relay.

[0060] When the power supply supplies power to the coil in the resistance relay, the contacts of the resistance relay are automatically closed, thereby controlling the second resistance to automatically access the CAN bus resistance loop; when the power supply does not supply power to the coil in the resistance relay, the contacts of the resistance relay are automatically opened, thereby controlling the second resistance to automatically leave the CAN bus resistance loop.

[0061] When the power supply module controls the power supply to be turned on, the power supply outputs a 24V voltage to supply power to the coil in the resistance relay; when the power supply module controls the power supply to be turned off, the power supply does not output a 24V voltage.

[0062] Optionally, the CAN bus resistance control system provided in the embodiments of the present application further includes a CAN bus detection module in communication connection with the CAN bus resistance loop, and the CAN bus detection module is used to detect the resistance value between the CAN high-side data line and the CAN low-side data line.

[0063] The CAN bus detection module can be arranged at the cab of the super-large heavy equipment.

[0064] The resistance value between the CAN high-side data line and the CAN low-side data line can be the resistance value output by the CAN bus resistance loop.

[0065] The CAN bus detection module is used to detect the resistance value between the CAN high-side data line and the CAN low-side data line before the operator opens the cab door of the super-large heavy equipment and the whole machine of the super-large heavy equipment is not powered on.

[0066] The CAN bus detection module can detect the CAN bus load rate by detecting the resistance between the CAN high-side data line and the CAN low-side data line, and feed back the CAN bus load rate to the display screen in real time for display, further judge whether the CAN bus load rate is abnormal, and automatically update the program for the abnormal CAN bus load rate, prolong the controller message sending period to reduce the CAN bus load rate, until the CAN bus load rate is less than a preset value.

[0067] Optionally, the CAN bus resistance control system provided by the embodiment of the present application further comprises a programmable controller in communication connection with the CAN bus resistance loop, and the programmable controller is configured to detect the upper-mounted hoist signal and generate a control signal according to the detection result.

[0068] Optionally, the programmable controller can be arranged at the chassis of the super-large heavy equipment.

[0069] Optionally, the number of the programmable controller can be at least one. The number, type and specific installation position of the programmable controller are not limited by the embodiment of the present application, and can be determined according to actual application requirements.

[0070] Optionally, the programmable controller is configured to detect the upper-mounted hoist signal after the super-large heavy equipment is powered on, and when the upper-mounted hoist signal is detected, it indicates that the super-large heavy equipment is in a whole-machine running state, i.e., the chassis and the upper-mounted part of the super-large heavy equipment are not split, and a control signal for controlling the second resistance to be disconnected from the CAN bus resistance loop is generated according to the detection result; when the upper-mounted hoist signal is not detected, it indicates that the super-large heavy equipment is in a chassis running state, i.e., the chassis and the upper-mounted part of the super-large heavy equipment are split, and a control signal for controlling the second resistance to be connected to the CAN bus resistance loop is generated according to the detection result.

[0071] Optionally, the programmable controller is further configured to send the control signal to the power supply module, so that the power supply module controls the power supply to be turned on or turned off according to the control signal.

[0072] Optionally, when the control signal is the control signal for controlling the second resistance to be disconnected from the CAN bus resistance loop, the power supply module controls the power supply to be turned off, so that the contact of the resistance relay is automatically opened, and then the second resistance is disconnected from the CAN bus resistance loop; when the control signal is the control signal for controlling the second resistance to be connected to the CAN bus resistance loop, the power supply module controls the power supply to be turned on, so that the contact of the resistance relay is automatically closed, and then the second resistance is connected to the CAN bus resistance loop.

[0073] Optionally, the CAN bus resistance control system provided by the embodiment of the present application further comprises a display screen in communication connection with the CAN bus resistance loop, and the display screen is configured to display the resistance value between the CAN high-bit data line and the CAN low-bit data line.

[0074] Optionally, the display screen can be arranged at the cab of the super-large heavy equipment, so as to facilitate the operator to obtain the resistance value between the CAN high-bit data line and the CAN low-bit data line in real time.

[0075] Optionally, the display screen is further configured to display alarm prompt information, and the alarm prompt information is used to prompt the CAN bus resistance fault.

[0076] Exemplarily, when the resistance value between the CAN high data line and the CAN low data line displayed on the display screen is not in the normal range of the CAN bus loop resistance value, the display screen displays the resistance value between the CAN high data line and the CAN low data line and displays an alarm prompt information to prompt the operator that the CAN bus resistance is faulty and needs to be checked.

[0077] Optionally, the resistance values of the first resistance, the second resistance and the third resistance are the same, and the resistance value is 120Ω.

[0078] It can be understood that when the super-large heavy equipment is in the whole machine running state, the second resistance is controlled to be disconnected from the CAN bus resistance loop, the CAN bus resistance loop is connected in parallel through the first resistance and the third resistance, so that the CAN bus loop resistance is stabilized at about 60Ω; when the super-large heavy equipment is in the chassis running state, the second resistance is controlled to be connected to the CAN bus resistance loop, the CAN bus resistance loop is connected in parallel through the first resistance and the second resistance, so that the CAN bus loop resistance is stabilized at about 60Ω, and the CAN bus communication is normal.

[0079] Optionally, the CAN bus resistance control system provided by the embodiment of the application further comprises a connector, which is used to control the connection or disconnection of the first farthest terminal and the second farthest terminal.

[0080] Exemplarily, when the super-large heavy equipment is in the whole machine running state, the chassis CAN bus of the super-large heavy equipment is connected to the upper-mounted CAN bus of the super-large heavy equipment through the connector, so as to realize the connection of the chassis and the upper-mounted equipment; when the super-large heavy equipment is in the chassis running state, the connector disconnects the connection between the chassis CAN bus and the upper-mounted CAN bus, so as to realize the disconnection of the chassis and the upper-mounted equipment.

[0081] Optionally, the CAN bus resistance control system provided by the embodiment of the application further comprises a central control host, a vehicle control unit (VCU), a centralized lubrication system and a mast inclination sensor, which are respectively connected in communication with the CAN bus resistance loop.

[0082] Exemplarily, the central control host can be arranged at the cab of the super-large heavy equipment.

[0083] Exemplarily, the number of the central control host can be at least one. The number and the specific installation position of the central control host are not limited in the embodiment of the application, and can be determined according to actual application requirements.

[0084] Exemplarily, the VCU can be arranged at the chassis of the super-large heavy equipment.

[0085] The number of VCU can be at least one, for example.

[0086] The centralized lubrication system and the mast inclination sensor can be arranged at the upper part of the super-large heavy equipment, for example.

[0087] In summary, the following Figure 2 The CAN bus resistance control system provided by the embodiments of the present application is described in detail.

[0088] Figure 2 The structure of the CAN bus resistance control system provided by the embodiments of the present application is shown in Figure Two . As Figure 2 shown, the CAN bus resistance control system 20 includes a first resistor 101, a CAN bus detection module 120, a display screen 130, a central control host 140, a programmable controller 150, a VCU 160, a power module 170, a power supply 180, a second resistor 102, a resistor relay 104, a connector 190, a centralized lubrication system 200, a mast inclination sensor 210, and a third resistor 103.

[0089] As Figure 2 shown, the first resistor 101, the CAN bus detection module 120, the display screen 130, and the central control host 140 are arranged at the cab of the super-large heavy equipment, the programmable controller 150, the VCU 160, the power module 170, the power supply 180, the second resistor 102, and the resistor relay 104 are arranged at the chassis of the super-large heavy equipment, and the centralized lubrication system 200, the mast inclination sensor 210, and the third resistor 103 are arranged at the upper part of the super-large heavy equipment.

[0090] The first resistor 101, the second resistor 102, the third resistor 103, and the resistor relay 104 form a CAN bus resistance loop 110, for example. The specific connection mode between the first resistor 101, the second resistor 102, the third resistor 103, and the resistor relay 104 is similar to the above, which will not be repeated here.

[0091] The components in the CAN bus resistance control system are connected in communication through the CAN bus, such as the CAN high data line 21 and the CAN low data line 22.

[0092] The specific implementation mode of the components in the CAN bus resistance control system is similar to the above, which will not be repeated here.

[0093] The control mode of the CAN bus resistance control system is described in detail as follows. Figure 2 ​

[0094] It can be understood that the super heavy equipment applicable to the CAN bus resistance control system provided in the embodiments of the present application can include different operating states such as a whole machine operating state and a chassis operating state, and the control modes of the CAN bus resistance control system in the two operating states will be described in detail respectively.

[0095] 1) Whole machine operating state, that is, the chassis and the upper equipment of the super heavy equipment are not split:

[0096] S1, before the operator opens the cab door and the whole machine is powered on, the CAN bus detection module detects the resistance value between the CAN high data line and the CAN low data line;

[0097] S2, after the whole machine is powered on, the programmable controller detects the upper equipment winch signal, and when it is detected that the upper equipment winch signal exists, it means that the chassis and the upper equipment are not split, and the programmable controller generates a control signal according to the detection result. The specific implementation mode is similar to the above, which will not be described here.

[0098] S3, the display screen displays the resistance value between the CAN high data line and the CAN low data line. If the resistance value between the CAN high data line and the CAN low data line is within the range of 60±n1Ω, the power module has cut off the 24V voltage output of the power supply, and the whole machine is running normally after being powered on. If the resistance value between the CAN high data line and the CAN low data line is within the range of 40±n2Ω, it means that the second resistance in the electric control cabinet is not disconnected from the CAN bus resistance loop, then the power module cuts off the 24V voltage output of the power supply port, the resistance relay contact a is automatically disconnected, and the second resistance is disconnected from the CAN bus resistance loop, to ensure the stability of the whole machine CAN bus communication. If the resistance value is neither within the range of 60±n1Ω nor within the range of 40±n2Ω, the display screen displays the resistance value between the CAN high data line and the CAN low data line and displays an alarm prompt information to prompt the operator that the CAN bus resistance is faulty and needs to be checked.

[0099] 2) Chassis operating state such as site conversion transportation, that is, the chassis and the upper equipment of the super heavy equipment are split into two parts:

[0100] S1, before the operator opens the cab door and the whole machine is powered on, the CAN bus detection module detects the resistance value between the CAN high data line and the CAN low data line;

[0101] S2, after the whole machine is powered on, the programmable controller detects the upper equipment winch signal, and when it is detected that the upper equipment winch signal does not exist, it means that the super heavy equipment is in the site conversion transportation stage, the chassis and the upper equipment are split into two parts, and the connector is disconnected.

[0102] S3, display the resistance value between the CAN high data line and the CAN low data line through the display screen, if the resistance value between the CAN high data line and the CAN low data line is in the range of 60±n1Ω, the power module is connected to the power supply and outputs 24V voltage, the chassis is normally operated after being powered on; if the resistance value between the CAN high data line and the CAN low data line is in the range of 120±n3Ω, it indicates that the second resistance in the electric control cabinet is disconnected from the CAN bus resistance loop, the power module is connected to the power supply and outputs 24V voltage, the resistance relay contact is automatically closed, the second resistance is connected to the chassis CAN bus resistance loop, and the chassis CAN bus communication is ensured to be stable; if the resistance value between the CAN high data line and the CAN low data line is neither in the range of 60±n1Ω nor in the range of 120±n3Ω, the display screen displays the resistance value between the CAN high data line and the CAN low data line and displays an alarm prompt information to prompt the operator that the CAN bus resistance is faulty and needs to be checked.

[0103] For example, the values of n1, n2 and n3 can be between 0Ω and 5Ω.

[0104] The application does not limit the values of n1, n2 and n3, which can be determined according to actual application requirements.

[0105] In summary, the CAN bus resistance control system provided by the application has the following beneficial effects:

[0106] 1) By arranging the first resistance at the first farthest terminal of the whole machine CAN bus architecture, arranging the second resistance at the third farthest terminal of the chassis CAN bus architecture, and arranging the third resistance at the third farthest terminal of the whole machine CAN bus architecture, the CAN bus resistance arrangement in the related art is changed, the applicability of the CAN bus resistance loop is improved while the CAN bus loop resistance is stabilized at about 60Ω;

[0107] 2) Before the operator opens the cab door and the whole machine is not powered on, the resistance value between the CAN high data line and the CAN low data line is detected by the CAN detection module, the programmable controller determines the running state of the super large heavy equipment as the whole machine running state or the chassis running state by detecting the upper-mounted winch signal, and further controls whether the resistance relay contact is closed according to the resistance value between the CAN high data line and the CAN low data line, thereby controlling whether the second resistance is connected to the CAN bus resistance loop, ensuring the stability of the chassis CAN bus communication, replacing manual resistance connection and removal, and improving operation convenience.

[0108] Optionally, the application further provides a rotary drilling rig, comprising a rotary drilling rig body and the CAN bus resistance control system provided by the above embodiments.

[0109] Exemplarily, the CAN bus resistance control system is similar to the above, which will not be described here.

[0110] Finally, it should be noted that: other embodiments of the application will be readily apparent to those skilled in the art with the disclosure herein in consideration. The application is intended to cover any variations, uses or adaptive changes of the application following the general principles of the application and including common knowledge or conventional technical means in the art which are not disclosed by the application, and is not limited to the exact structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the application is only limited by the appended claims.

Claims

1. A CAN bus resistor control system, characterized in that, include: Controller Area Network (CAN) bus resistor loop; The CAN bus resistor circuit includes a first resistor, a second resistor, a third resistor, and a resistor relay. The second resistor and the resistor relay are connected in series, and the series combination is connected in parallel with the first resistor and the third resistor. The first resistor is located at the first furthest terminal of the CAN bus architecture of the whole machine, and the third resistor is located at the second furthest terminal of the CAN bus architecture of the whole machine. The second resistor is located at the third furthest terminal of the chassis CAN bus architecture; The resistor relay is used to control the connection or disconnection of the second resistor.

2. The CAN bus resistance control system according to claim 1, characterized in that, Also includes: A power module is communicatively connected to the resistor relay. The power module is used to control the connection or disconnection of the power supply, and the power supply is used to supply power to the resistor relay.

3. The CAN bus resistance control system according to claim 1, characterized in that, Also includes: A CAN bus detection module is communicatively connected to the CAN bus resistance loop. The CAN bus detection module is used to detect the resistance value between the CAN high-order data line and the CAN low-order data line.

4. The CAN bus resistance control system according to any one of claims 1 to 3, characterized in that, Also includes: A programmable controller is communicatively connected to the CAN bus resistor loop. The programmable controller is used to detect the upper hoist signal and generate a control signal based on the detection result.

5. The CAN bus resistance control system according to claim 4, characterized in that, The programmable controller is also used to send control signals to the power module so that the power module controls the power supply to be turned on or off according to the control signals.

6. The CAN bus resistance control system according to any one of claims 1 to 3, characterized in that, Also includes: A display screen is communicatively connected to the CAN bus resistor loop, and the display screen is used to display the resistance value between the CAN high data line and the CAN low data line.

7. The CAN bus resistance control system according to claim 6, characterized in that, The display screen is also used to display alarm messages, which are used to indicate CAN bus resistor failure.

8. The CAN bus resistance control system according to any one of claims 1 to 3, characterized in that, The first resistor, the second resistor, and the third resistor have the same resistance value, which is 120Ω.

9. The CAN bus resistance control system according to claim 8, characterized in that, Also includes: A connector for controlling the connection or disconnection of the first farthest terminal and the second farthest terminal.

10. A rotary drilling rig, characterized in that, It includes a rotary drilling rig body and a CAN bus resistance control system as described in any one of claims 1 to 9 above.

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