Communication component, communication system and launch vehicle

Abstract

The embodiment of the present application provides a communication component, a communication system and a launch vehicle, which relate to the field of CAN communication technology. The communication component includes: a first resistor, at least two second resistors and at least one switch module; at least one switch module is configured to, during the separation stage of the sub-stage, when the sub-stage to be separated is separated, the first end and the second end of the switch module corresponding to the previous sub-stage of the sub-stage to be separated are turned on, so as to electrically connect the second resistor of the previous sub-stage to the second communication line, so that a communication backbone of the CAN bus is formed between the first resistor and the second resistor of the previous sub-stage. The embodiment of the present application can realize that the terminal matching resistors of the two CAN buses are always arranged on the two sub-stages at both ends of the multi-stage rocket, without having to consider whether the length of the branch point in the CAN bus network will affect the communication reliability, avoiding the problem that the length of the bus branch should not be too long, and improving the reliability and design convenience of the application of the CAN bus on the rocket.

Description

Technical Field

[0001] This application relates to the field of CAN communication technology. Specifically, this application relates to a communication component, a communication system, and a launch vehicle. Background Art

[0002] In the application field of aerospace electrical systems, the CAN (Controller Area Network) bus is a relatively common communication method. Terminal matching resistors are usually added at both ends of a CAN bus network. The part between the two terminal matching resistors is usually called the communication backbone of the CAN bus. Other nodes are mounted on the backbone and are called bus branches, and the length of the bus branches should not be too long.

[0003] When arranging the CAN bus in application fields such as multi-stage rockets or aircraft, it is necessary to consider that the CAN bus nodes participating in communication will be removed as the cabin segments are separated. To ensure that the remaining nodes can still communicate reliably, the terminal matching resistors still need to be in the bus network. Usually, the method adopted is to arrange the two terminal matching resistors at the last stage (the last sub-stage) when laying the CAN bus. Although the bus branches are disconnected as the cabin segments are separated, the terminal matching resistors will always be in the network. However, as the number of rocket stages increases, this method will cause the length of the bus branches to be too long, affecting the communication stability of the CAN bus and reducing reliability.

[0004] Therefore, considering that the length of the bus branches should not be too long, the above communication method has limitations. Summary of the Invention

[0005] This application provides a communication component, a communication system, and a launch vehicle to solve the technical problem that the existing communication method cannot avoid the problem that the length of the bus branches should not be too long.

[0006] In a first aspect, an embodiment of this application provides a communication component applied to a multi-stage rocket, including:

[0007] A first resistor for being arranged at the last stage of the multi-stage rocket, and both ends of the first resistor are respectively used to connect to the first communication line and the second communication line of the CAN bus;

[0008] At least two second resistors, each second resistor is respectively used to be correspondingly arranged at a sub-stage of the multi-stage rocket. The two ends of the second resistor arranged at a sub-stage of the multi-stage rocket are respectively used to connect to the first communication line and the second communication line, and one end of the remaining second resistors is used to connect to the first communication line;

[0009] At least one switch module, the first end of each switch module is used to connect to the second communication line, and the second end of each switch module correspondingly connects to the other end of one of the remaining second resistors;

[0010] Wherein, at least one switch module is configured to conduct between the first end and the second end of the switch module corresponding to the previous sub-stage of the sub-stage to be separated during the sub-stage separation phase, so as to electrically connect the second resistor of the previous sub-stage to the second communication line, such that a communication backbone of the CAN bus is formed between the first resistor and the second resistor of the previous sub-stage.

[0011] In a possible implementation manner, each switch module is further configured to disconnect between the first end and the second end of the switch module to disconnect the corresponding second resistor from the second communication line in the powered-on state; and conduct between the first end and the second end of the switch module to electrically connect the corresponding second resistor to the second communication line in the powered-off state.

[0012] In a possible implementation manner, the communication component further includes:

[0013] At least one separation connector, wherein the first end of each separation connector is electrically connected to the third end of a corresponding switch module, the second end of each separation connector is used for electrically connecting to the first end of the power supply, and the fourth end of each switch module is used for electrically connecting to the second end of the power supply;

[0014] Wherein, each separation connector is configured to disconnect the separation connector corresponding to the sub-stage to be separated during the sub-stage separation phase, so as to disconnect the switch module corresponding to the previous sub-stage of the sub-stage to be separated from the power supply, and conduct between the first end and the second end of the switch module.

[0015] In a possible implementation manner, each separation connector is further configured to electrically connect the switch module corresponding to the separation connector to the power supply in the initial stage, so as to disconnect between the first end and the second end of the switch module.

[0016] In a possible implementation manner, the switch module includes a relay;

[0017] The first end, the second end, the third end, and the fourth end of the relay respectively serve as the first end, the second end, the third end, and the fourth end of the switch module.

[0018] In a possible implementation manner, the separation connector includes a separation connector plug and a separation connector socket;

[0019] The separation connector socket serves as the first end of the separation connector, and the separation connector plug serves as the second end of the separation connector;

[0020] The separation connector plug and the separation connector socket are respectively disposed on two adjacent sub-stages.

[0021] In a possible implementation, at least one switch module is configured such that in the initial stage, the first end and the second end of each switch module are both in an open state, so that a communication backbone of the CAN bus is formed between the first resistor and the second resistor of a sub-stage.

[0022] In a second aspect, an embodiment of the present application provides a communication system, including: a CAN bus and the communication component of the first aspect;

[0023] The CAN bus includes a first communication line and a second communication line;

[0024] Both ends of the first resistor are respectively connected to the first communication line and the second communication line;

[0025] The second resistor used for being arranged in a sub-stage of a multi-stage rocket has both ends respectively connected to the first communication line and the second communication line;

[0026] One end of each of the remaining second resistors is connected to the first communication line, and the first end of each switch module is connected to the second communication line.

[0027] In a possible implementation, the communication system further includes: a power supply;

[0028] The power supply is configured to be electrically connected or disconnected from the switch module, so as to cause the first end and the second end of the switch module to conduct or disconnect; and / or,

[0029] The power supply includes any one of the following: a storage battery, a thermal battery, and a power distribution device.

[0030] In a third aspect, an embodiment of the present application provides a launch vehicle, which is a multi-stage rocket and includes: the communication component of the first aspect or the communication system of the second aspect.

[0031] The beneficial technical effects brought by the technical solution provided by the embodiment of the present application include:

[0032] The first resistor in the embodiment of the present application serves as a terminal matching resistor of the CAN bus network. During the sub-stage separation stage, by conducting the first end and the second end of the switch module corresponding to the previous sub-stage of the sub-stage to be separated, the second resistor of the previous sub-stage is electrically connected to the second communication line, so that a communication backbone of the CAN bus is formed between the first resistor and the second resistor of the previous sub-stage. In this way, the terminal matching resistor of the CAN bus is automatically switched, so that the two terminal matching resistors are always arranged at the two sub-stages at both ends of the multi-stage rocket, and there is no need to consider whether the length of the branch point in the CAN bus network will affect the communication reliability, avoiding the problem of too long length of the bus branch, and improving the reliability and design convenience of the application of the CAN bus on the rocket.

[0033] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent from the following description, or will be learned through the practice of the present application. Description of the Drawings

[0034] The above-mentioned and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of the embodiments in conjunction with the drawings, where:

[0035] Figure 1 FIG. is a schematic structural diagram of a communication component connected to a CAN bus provided for an embodiment of the present application;

[0036] Figure 2 FIG. is an application scenario diagram of a communication component provided for an embodiment of the present application;

[0037] Figure 3 FIG. is another application scenario diagram of a communication component provided for an embodiment of the present application.

[0038] Reference Signs:

[0039] 110 - Switch module;

[0040] 120 - Separation connector, 121 - Separation connector plug, 122 - Separation connector socket;

[0041] 210 - First communication line;

[0042] 220 - Second communication line;

[0043] 30 - Power supply. Detailed Embodiments

[0044] The present application will be described in detail below. Examples of embodiments of the present application are shown in the drawings, where the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. In addition, if the detailed description of the known technology is unnecessary for showing the features of the present application, it will be omitted. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and cannot be construed as a limitation of the present application.

[0045] Those skilled in the art of the present technology can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of those of ordinary skill in the field to which the present application belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as here.

[0046] Those skilled in the art can understand that, unless specifically stated otherwise, the singular forms "a", "an", "the", and "said" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the specification of this application means the presence of the described features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or their groups. It should be understood that when we say an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0047] In the related art, according to the ISO 11898 standard, in order to enhance the reliability of CAN communication, terminal matching resistors are usually added at both ends of the CAN bus network. The part between the two terminal matching resistors is usually called the communication backbone of the CAN bus. Other nodes are mounted on the backbone and are called bus branches, and the length of the bus branches should not be too long. At the same time, according to ISO11898, when the communication rate is 1 M baud rate, the length of the bus branch does not exceed 0.3 meters. The existing communication methods have limitations and cannot avoid the problem that the length of the bus branch should not be too long.

[0048] A communication component, a communication system, and a launch vehicle provided by this application aim to solve the above technical problems in the prior art.

[0049] The following uses specific embodiments to elaborate in detail on the technical solution of this application and how the technical solution of this application solves the above technical problems.

[0050] See Figure 1 As shown, the embodiment of this application provides a schematic diagram of the structure of a communication component connected to the CAN bus. As Figure 1 shown, this communication component is applied to a multi-stage rocket, and this communication component includes: a first resistor, at least two second resistors, and at least one switch module 110.

[0051] The first resistor is used to be arranged at the last stage of the multi-stage rocket, and both ends of the first resistor are respectively used to be connected to the first communication line 210 and the second communication line 220 of the CAN bus.

[0052] Each second resistor is respectively used to be correspondingly arranged at one stage of the multi-stage rocket. The two ends of the second resistor used to be arranged at one stage of the multi-stage rocket are respectively used to be connected to the first communication line 210 and the second communication line 220, and one end of the remaining second resistors is used to be connected to the first communication line 210.

[0053] The first end of each switch module 110 is used to connect to the second communication line 220, and the second end of each switch module 110 is correspondingly connected to the other end of one of the remaining second resistors.

[0054] Among them, at least one switch module 110 is configured to conduct the first end and the second end of the switch module 110 corresponding to the previous sub-stage of the sub-stage to be separated during the sub-stage separation phase, so as to electrically connect the second resistor of the previous sub-stage to the second communication line 220, so that a communication backbone of the CAN bus is formed between the first resistor and the second resistor of the previous sub-stage.

[0055] Specifically, the number of terminal matching resistors is two. One is the first resistor, which is a fixed terminal matching resistor, and the other is the second resistor. Which second resistor is selected as the terminal matching resistor can be changed. During the sub-stage separation phase, the second resistor of the previous sub-stage of the sub-stage to be separated is used as a terminal matching resistor.

[0056] Optionally, among the first communication line 210 and the second communication line 220, one is used to receive the differential positive signal, and the other is used to receive the differential negative signal. The sub-stage separation phase is the phase of separating the sub-stage to be separated.

[0057] Optionally, the number of switch modules 110 is one less than the number of second resistors, and a sub-stage may not be correspondingly provided with a switch module 110. Of course, the second resistor R2 can also be controlled to be connected to the first communication line 210 and the second communication line 220 during the initial stage as a terminal matching resistor.

[0058] See Figure 1 As shown, in the embodiment of the present application, a multi-stage rocket includes four sub-stages as an example, and the fourth sub-stage is the last sub-stage of the multi-stage rocket. R1 is the first resistor located at the last sub-stage of the multi-stage rocket, and R2, R3, R4, and R5 are second resistors. The second resistor of the first sub-stage is R2, and R3, R4, and R5 are the second, third, and fourth sub-stages in sequence. The first communication line 210 receives the differential negative signal CAN-, and the second communication line 220 receives the differential positive signal CAN+.

[0059] Optionally, the resistance values of the first resistor and the second resistor are equal and are set according to actual needs.

[0060] The first resistor of the communication component in the embodiment of the present application serves as a terminal matching resistor of the CAN bus network. During the sub-stage separation phase, by conducting the first end and the second end of the switch module 110 corresponding to the previous sub-stage of the sub-stage to be separated, the second resistor of the previous sub-stage is electrically connected to the second communication line 220, so that a communication backbone of the CAN bus is formed between the first resistor and the second resistor of the previous sub-stage. In this way, the terminal matching resistor of the CAN bus is automatically switched, so that the two terminal matching resistors are always arranged at the two sub-stages at both ends of the multi-stage rocket, and there is no need to consider whether the length of the branch point in the CAN bus network will affect the communication reliability, avoiding the problem of too long length of the bus branch, and improving the reliability and design convenience of the application of the CAN bus on the rocket.

[0061] In some embodiments, each switch module 110 is further configured that in the powered-on state, the first end and the second end of the switch module 110 are disconnected to disconnect the corresponding second resistor from the second communication line 220; in the powered-off state, the first end and the second end of the switch module 110 are conducted to electrically connect the corresponding second resistor to the second communication line 220.

[0062] Optionally, the switch module 110 in the embodiment of the present application is disconnected when powered on and conducted when powered off. Using this principle of the switch module 110, the switch module 110 corresponding to the second resistor that needs to be connected to the CAN bus can be disconnected. At the same time, those skilled in the art can think that the switch module 110 being conducted when powered on and disconnected when powered off can also be applicable to the communication component in the embodiment of the present application in some scenarios controlled by the control module.

[0063] In some embodiments, at least one switch module 110 is configured that in the initial stage, the first end and the second end of each switch module 110 are both in the disconnected state, so that a communication backbone of the CAN bus is formed between the first resistor and the second resistor of a sub-stage.

[0064] Optionally, the embodiment of the present application can realize that the terminal matching resistors of the CAN bus are respectively located at the sub-stages at both ends of the multi-stage rocket, so that each sub-stage is located on the communication backbone, avoiding the problem that the length of the bus branch should not be too long.

[0065] See Figure 2 As shown, the embodiment of the present application provides an application scenario diagram of a communication component. Figure 2 It shows the CAN bus network layout diagram of the second stage of the rocket. As Figure 2 shown, the communication component further includes: at least one separation connector 120.

[0066] The first end of each separating connector 120 is electrically connected to the third end of a switch module 110 correspondingly, the second end of each separating connector 120 is used for electrically connecting to the first end of a power supply 30, and the fourth end of each switch module 110 is used for electrically connecting to the second end of the power supply 30.

[0067] Wherein, each separating connector 120 is configured to be disconnected at the sub-level separation stage for the separating connector 120 corresponding to the sub-level to be separated, so that the switch module 110 corresponding to the previous sub-level of the sub-level to be separated is disconnected from the power supply 30, and the first end and the second end of the switch module 110 are conducted.

[0068] Optionally, each device communicates through a CAN bus, and each sub-level is electrically connected through a separating connector 120.

[0069] In practical applications, a control module can also be designed to control the conduction and disconnection of the first end and the second end of the switch module 110, so as to connect the second resistor of the previous sub-level of the sub-level to be separated to the second communication line 220. The second resistor of the previous sub-level becomes a terminal matching resistor, and the automatic switching of the terminal matching resistor of the CAN bus in the embodiments of the present application can also be realized, avoiding the problem that the length of the bus branch should not be too long.

[0070] Optionally, the separating connector 120 can be used to control the conduction and disconnection of the first end and the second end of the switch module 110. The third end and the fourth end of the switch module 110 are used for electrically connecting to both ends of the power supply 30, and whether the switch module 110 is powered on is controlled by the separating connector 120.

[0071] Optionally, the first end of the power supply 30 is the positive pole; the second end of the power supply 30 is the negative pole.

[0072] In some embodiments, each separating connector 120 is further configured to electrically connect the switch module 110 corresponding to the separating connector 120 to the power supply 30 at the initial stage, so that the first end and the second end of the switch module 110 are disconnected.

[0073] Optionally, each separating connector 120 correspondingly controls a switch module 110. The separating connector 120 is arranged between two adjacent sub-levels, and the switch module 110 is located in the previous sub-level of the two adjacent sub-levels.

[0074] In some embodiments, the switch module 110 includes a relay; the first end, the second end, the third end, and the fourth end of the relay are respectively used as the first end, the second end, the third end, and the fourth end of the switch module 110.

[0075] Specifically, a relay is an electrical control device. When the change of the input quantity (excitation quantity) reaches the specified requirement, it is an electrical appliance that causes a predetermined step change in the controlled quantity in the electrical output circuit.

[0076] In some embodiments, the separation connector 120 includes a separation connector plug 121 and a separation connector socket 122; the separation connector socket 122 serves as the first end of the separation connector 120, and the separation connector plug 121 serves as the second end of the separation connector 120.

[0077] The separation connector plug 121 and the separation connector socket 122 are respectively disposed on two adjacent sub - levels.

[0078] Specifically, when the sub - levels are separated, the separation connector plug 121 and the separation connector socket 122 are separated. It can be that the separation connector plug 121 falls off along with the separated sub - level, so that the switch module 110 corresponding to the previous sub - level of the sub - level to be separated is disconnected from the power supply 30, and the first end and the second end of the switch module 110 are conducted.

[0079] Specifically, the separation connector 120 is an electrical connector, generally applied to aerospace products such as missiles and rockets. When used for inter - stage separation, the separation connector plug 121 and the separation connector socket 122 can be reliably separated along with the separation of the missile body.

[0080] See Figure 2 As shown, the multi - stage rocket of the embodiment of the present application includes a first - stage and a second - stage. The second - stage is the last stage. In the initial stage, the line between R1 and R2 is the communication backbone. The devices A1 and A2 are connected to the communication backbone of the second - stage. The device B1 is connected to the communication backbone of the first - stage. After the first - stage is separated, the line between R1 and R3 is the communication backbone, and the devices A1 and A2 are connected to the communication backbone of the second - stage. K1 represents a switch module 110.

[0081] As an example, the resistance values of the first resistor R1, the second resistors R2 and R3 are all 120Ω (ohms), and the power supply 30 is a 12V DC power supply.

[0082] See Figure 3 As shown, the embodiment of the present application provides an application scenario diagram of another communication component. Figure 3 Shows the CAN bus network layout diagram of the three - stage rocket. As Figure 3 The embodiment shown in Figure 2 The main differences between the embodiment shown in Figure 3 The multi - stage rocket of the embodiment shown includes three sub - levels, and K1 and K2 respectively represent a switch module 110.

[0083] Optionally, relays are selected for K1 and K2. For example, the model is JQX-15F / 012-1D 64-20A, the contact form is normally closed, the coil operating voltage is 12V, and the contacts are opened after being powered on. The separation connector 120 can be selected as YF6W-78ZK and YF6W-78TJ. The 12V DC power supply is supplied by a 12V battery. Among them, the electrical signal of the 12V power supply passes through the separation connector 120 between the first and second sub-levels twice and is connected to the input port of the relay K1. The electrical signal of the 12V power supply passes through the separation connector 120 between the second and third sub-levels twice and is connected to the input port of the relay K2.

[0084] The relays and the separation connector 120 in the embodiments of the present application are not limited to the models selected in the embodiments and can be selected according to the actual circuit.

[0085] In the initial state, the power supply 30 is turned on. At this time, the input quantities of the relays K1 and K2 are valid, resulting in the output contacts of the two relays being opened, that is, the resistor R3 located in the second sub-level and the resistor R4 located in the third sub-level are not connected to the CAN communication network, and R1 and R2 become the two terminal matching resistors of the CAN communication network. The line between R1 and R2 is the communication backbone. The devices A1 and A2 are connected to the communication backbone of the third sub-level, the device B1 is connected to the communication backbone of the second sub-level, and the device C1 is connected to the communication backbone of the first sub-level.

[0086] During the flight of the multi-stage rocket, the first and second sub-levels are separated first. At this time, R2 drops with the first sub-level, and the separation connector 120 between the first and second sub-levels is separated, resulting in the disappearance of the 12V input signal of the relay K1 at this time, causing the output contact of the relay K1 to close, and the resistor R3 is connected to the CAN communication network and becomes the terminal matching resistor, that is, at this time, R1 and R3 become the two terminal matching resistors of the CAN communication network.

[0087] When the multi-stage rocket continues to fly to a certain moment, the second and third sub-levels are separated. At this time, the resistor R3 drops with the second sub-level, and the separation connector 120 between the second and third sub-levels is separated, resulting in the disappearance of the 12V input signal of the relay K2 at this time, causing the output contact of the relay K2 to close, and the resistor R4 is connected to the CAN communication network and becomes the terminal matching resistor, that is, at this time, R1 and R4 become the two terminal matching resistors of the CAN communication network, and the third sub-level continues to fly. This ensures that the CAN communication network is always effective throughout the flight of the rocket.

[0088] It should be noted that the number of rocket sub-levels in the embodiments of the present application is not limited to 3 in the embodiments, that is, four-stage rockets, five-stage rockets, etc. are also supported, and the CAN bus communication construction method in the embodiments of the present application is universal.

[0089] In the embodiments of the present application, the number of devices connected to the CAN communication network in each rocket sub-stage is not limited to 1 or 2 in the embodiments. In the embodiments of the present application, it is not limited to using 1 set of CAN communication network. In actual rocket applications, at least 2 sets of CAN communication networks are often designed for redundancy, but each set of CAN communication networks can independently apply the methods in the embodiments.

[0090] According to the actual application scenarios of multi-stage rockets, the communication component in the embodiments of the present application can use two highly reliable devices, namely relays and separation connectors 120, to cleverly build a loop detection control circuit for the relays, solving the problem of terminal resistance management in CAN communication. The method is simple and reliable.

[0091] With the design concept of simplifying complexity, the communication component in the embodiments of the present application combines design methods such as loop detection control and relay switch control, and proposes a method for dynamically switching the terminal matching resistance of the CAN bus during the separation process of rocket stages, which can avoid the problem that the length of the bus branch should not be too long.

[0092] Based on the same inventive concept, the embodiments of the present application provide a communication system, including: a CAN bus and the communication component in the embodiments of the present application;

[0093] The CAN bus includes a first communication line 210 and a second communication line 220;

[0094] Both ends of the first resistor are respectively connected to the first communication line 210 and the second communication line 220;

[0095] Both ends of the second resistor used to be arranged in the first stage of the multi-stage rocket are respectively connected to the first communication line 210 and the second communication line 220;

[0096] One end of each of the remaining second resistors is connected to the first communication line 210, and the first end of each switch module 110 is connected to the second communication line 220.

[0097] In the electrical systems in the aerospace field, CAN buses are widely used. The embodiments of the present application propose a CAN bus communication method for multi-stage rockets, which automatically switches the terminal matching resistance of the CAN bus during the separation process of rocket stages, improving the reliability and design convenience of the CAN bus application on the rocket.

[0098] In some embodiments, the communication system further includes: a power supply 30;

[0099] The power supply 30 is configured to be electrically connected or disconnected from the switch module 110, so that the first end and the second end of the switch module 110 are conducted or disconnected; and / or,

[0100] The power supply 30 includes any one of the following: a storage battery, a thermal battery, and a power distribution device.

[0101] The power supply 30 is a 12V DC power supply, which is not limited to the output of a storage battery. It can also be the power distribution output of a device or the output of a thermal battery, etc. The output voltage of the DC power supply is adjusted according to the requirements of the relay input quantity.

[0102] The first resistor of the communication system according to the embodiment of the present application serves as a terminal matching resistor of the CAN bus network. During the sub-stage separation phase, by conducting the first end and the second end of the switch module 110 corresponding to the previous sub-stage of the sub-stage to be separated, the second resistor of the previous sub-stage is electrically connected to the second communication line 220, so that a communication backbone of the CAN bus is formed between the first resistor and the second resistor of the previous sub-stage. In this way, the terminal matching resistor of the CAN bus is automatically switched, so that the two terminal matching resistors are always arranged at the two sub-stages at both ends of the multi-stage rocket, and there is no need to consider whether the length of the branch point in the CAN bus network will affect the communication reliability, avoiding the problem that the length of the bus branch should not be too long, and improving the reliability and design convenience of the application of the CAN bus on the rocket.

[0103] According to the actual application scenario of the multi-stage rocket, the communication system according to the embodiment of the present application can use two devices with relatively high reliability, namely a relay and a separation connector 120, and ingeniously builds a loop detection control circuit of the relay, solving the problem of terminal resistance management in CAN communication. The method is simple and reliable.

[0104] According to the actual application scenario of the multi-stage rocket, the communication system according to the embodiment of the present application can use two devices with relatively high reliability, namely a relay and a separation connector 120, and ingeniously builds a loop detection control circuit of the relay, solving the problem of terminal resistance management in CAN communication. The method is simple and reliable.

[0105] Based on the same inventive concept, the embodiment of the present application provides a launch vehicle, which is a multi-stage rocket and includes: the communication component or the communication system according to the embodiment of the present application.

[0106] Optionally, the number of sub-stages of the launch vehicle can be set according to actual needs.

[0107] Applying the embodiment of the present application can at least achieve the following beneficial effects:

[0108] (1) The first resistor in the embodiment of the present application serves as a terminal matching resistor of the CAN bus network. During the sub-stage separation phase, by conducting the first end and the second end of the switch module 110 corresponding to the previous sub-stage of the sub-stage to be separated, the second resistor of the previous sub-stage is electrically connected to the second communication line 220, so that a communication backbone of the CAN bus is formed between the first resistor and the second resistor of the previous sub-stage, thereby automatically switching the terminal matching resistor of the CAN bus. That is, compared with the traditional CAN bus laying method in which two terminal matching resistors are always arranged at the two sub-stages at both ends of a multi-stage rocket, the embodiment of the present application does not need to consider whether the length of the branch point in the CAN bus network will affect the communication reliability, reducing the system risk and the design difficulty of the electrical system.

[0109] (2) The embodiment of the present application uses an ingenious combination of a relay and a separation connector 120, integrating the actual application scenario of the rocket, and solves the problem of terminal matching resistor management in CAN communication. The method is simple and reliable.

[0110] (3) The embodiment of the present application applies two components, namely a relay and a separation connector 120, which have extremely high reliability in the electrical system, and does not use digital circuit devices with relatively low reliability, improving the reliability of the electrical system.

[0111] (4) The number of sub-stages of the rocket in the embodiment of the present application is not limited to 3 in the embodiment, that is, it also supports four-stage rockets, five-stage rockets, etc. The CAN bus communication construction method in the embodiment of the present application is general and has strong applicability.

[0112] (5) In the embodiment of the present application, the devices accessing the CAN communication network in each sub-stage are not limited to 1 or 2 given in the embodiment of the present application. Multiple devices in each sub-stage of the multi-stage rocket can be allowed to access, without considering whether the length of the branch point in the CAN bus network will affect the communication reliability. Moreover, the embodiment of the present application is not limited to using 1 set of CAN communication network. The control principle of the embodiment of the present application can be adopted to design at least 2 sets of CAN communication networks for redundancy, and each set of CAN communication networks can independently apply the communication components and control principle in the embodiment.

[0113] Those skilled in the art of the present technology can understand that the various operations, methods, steps, measures, and solutions in the processes discussed in the present application can be alternated, changed, combined, or deleted. Further, the other steps, measures, and solutions in the various operations, methods, and processes discussed in the present application can also be alternated, changed, rearranged, decomposed, combined, or deleted. Further, the steps, measures, and solutions in the prior art that are the same as those disclosed in the present application can also be alternated, changed, rearranged, decomposed, combined, or deleted.

[0114] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0115] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0116] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0117] In the description of this specification, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0118] It should be understood that although the steps in the flowchart of the drawings are shown in sequence according to the indication of the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear indication in this article, the execution of these steps has no strict order limit and may be executed in other orders. Moreover, at least a part of the steps in the flowchart of the drawings may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same moment but may be executed at different moments, and their execution order is not necessarily sequential but may be executed alternately or in turn with at least a part of other steps or sub-steps or stages of other steps.

[0119] The above are only some embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. A communication component, applied to a multi-stage rocket, characterized in that Comprising: A first resistor configured to be disposed at the last stage of the multi-stage rocket, and both ends of the first resistor are respectively used to connect to a first communication line and a second communication line of the CAN bus; At least two variable second resistors, each of the second resistors is respectively configured to be correspondingly disposed at one stage of the multi-stage rocket, both ends of the second resistor disposed at one stage of the multi-stage rocket are respectively used to connect to the first communication line and the second communication line, and one end of the remaining second resistors is used to connect to the first communication line; At least one switch module, a first end of each of the switch modules is used to connect to the second communication line, and a second end of each of the switch modules correspondingly connects to one end of the remaining second resistors; Wherein, the at least one switch module is configured to, in the stage of stage separation, conduct the first end and the second end of the switch module corresponding to the previous stage of the stage to be separated, so as to electrically connect the second resistor of the previous stage to the second communication line, such that a communication backbone of the CAN bus is formed between the first resistor and the second resistor of the previous stage; At least one separation connector, a first end of each of the separation connectors correspondingly electrically connects to a third end of one of the switch modules, and a second end of each of the separation connectors is used to connect to a first end of a power supply; a fourth end of each of the switch modules is used to connect to a second end of the power supply; Wherein, each of the separation connectors is configured to, in the stage of stage separation, disconnect the separation connector corresponding to the stage to be separated, so as to disconnect the switch module corresponding to the previous stage of the stage to be separated from the power supply, and conduct the first end and the second end of the switch module; in the initial stage, electrically connect the switch module corresponding to the separation connector to the power supply, so as to disconnect the first end and the second end of the switch module.

2. The communication component according to claim 1, wherein Each of the switch modules is further configured to, in the powered-on state, disconnect the first end and the second end of the switch module, so as to disconnect the corresponding second resistor from the second communication line electrically; In the powered-off state, the first end and the second end of the switch module are conducted, so as to electrically connect the corresponding second resistor to the second communication line.

3. The communication component according to claim 1, characterized in that The switch module includes a relay; A first end, a second end, a third end, and a fourth end of the relay respectively serve as the first end, the second end, the third end, and the fourth end of the switch module.

4. The communication component according to claim 1, characterized in that, The separation connector includes: a separation connector plug and a separation connector socket; The separation connector socket serves as the first end of the separation connector, and the separation connector plug serves as the second end of the separation connector; The separation connector plug and the separation connector socket are respectively disposed at two adjacent stages.

5. The communication component according to claim 1, wherein The at least one switch module is configured to, in the initial stage, keep the first end and the second end of each of the switch modules in a disconnected state, such that a communication backbone of the CAN bus is formed between the first resistor and the second resistor of one stage.

6. A communication system, characterized in that, Comprising: A CAN bus and the communication component according to any one of claims 1-5; The CAN bus includes a first communication line and a second communication line; Both ends of the first resistor are respectively connected to the first communication line and the second communication line; Both ends of the second resistor for being arranged on the first stage of a multi-stage rocket are respectively connected to the first communication line and the second communication line; One end of each of the remaining second resistors is connected to the first communication line, and the first end of each of the switch modules is connected to the second communication line; The communication system further includes a power supply, and the power supply is configured to be electrically connected to or disconnected from the switch module so as to make the first end and the second end of the switch module conduct or disconnect.

7. The communication system according to claim 6, wherein The power supply includes any one of the following: a storage battery, a thermal battery, and a power distribution device.

8. A launch vehicle, characterized in that, The launch vehicle is a multi-stage rocket, including: the communication component according to any one of claims 1-5 or the communication system according to any one of claims 6-7.

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