CN209911830U - Adapter and electronic equipment - Google Patents

Abstract

Disclosed are an adaptor and an electronic device, including: the adapter body comprises a shell and two groups of pins, wherein one side surface of the shell is provided with an opening, and the two groups of pins are electrically connected with corresponding pins to form a plurality of parallel passages; an auxiliary circuit including a switching element and a load element, the switching element and the load element being connected in series, an operating portion of the switching element being disposed in an opening of the housing to be exposed outside the housing; wherein the auxiliary circuit is connected between predetermined two paths in the adaptor body, and the auxiliary circuit is a path when the switching element is closed, and the auxiliary circuit is an open circuit when the switching element is open. The adapter disclosed by the invention is suitable for various types of ECUs and development test working conditions, does not need to be frequently replaced, can simplify the operation in the development test process, and improves the efficiency of vehicle-mounted network development test.

Description

Adapter and electronic equipment

Technical Field

The present disclosure relates to the field of vehicle-mounted communication technologies, and in particular, to an adapter and an electronic device.

Background

Currently, an on-board network architecture of a vehicle (e.g., an automobile) often needs to be provided with up to several tens (e.g., 70 or more) of in-vehicle Electronic Control Units (ECUs). In order to reduce the complexity of wiring of an electronic system in a vehicle-mounted Network, a plurality of ECUs need to communicate with each other through a Controller Area Network (CAN) bus.

In the development and test stage, the whole CAN network in the automobile needs to be simulated by a CAN tool such as canoe (CAN open environment), and each ECU in the CAN network is developed, analyzed, simulated, tested and diagnosed so as to adjust the architecture of the CAN network timely to meet the requirements.

Disclosure of Invention

During development and test, the ECU is connected with the CAN tool through an adapter on a wiring harness. Because each ECU is different in design requirements, circuit structures, interface structures, and other aspects, adapters of different specifications need to be used when testing different ECUs. Under the condition that dozens of ECUs (for example, 70 or more) need to be deployed in the whole vehicle-mounted network, adapters with different specifications need to be frequently replaced in the development and test process, so that the operation is complex, time-consuming and labor-consuming, the ECU development and test efficiency is influenced, and great inconvenience is brought to the development and test of the vehicle-mounted network. In order to solve the above technical problem, it is desirable to provide an adapter having better versatility.

According to an aspect of the present disclosure, there is provided an adaptor including: the adapter body comprises a shell and two groups of pins, wherein one side surface of the shell is provided with an opening, and the two groups of pins are electrically connected with corresponding pins to form a plurality of parallel passages; an auxiliary circuit including a switching element and a load element, the switching element and the load element being connected in series, the switching element including an operation portion, a first connection end, a second connection end, and an on-off mechanism, the operation portion of the switching element being disposed in an opening of the housing so as to be exposed outside the housing, the operation portion being mechanically connected to the on-off mechanism, the first connection end being electrically connected to the load element, the on-off mechanism being at a first predetermined position when the operation portion is in a first state, the on-off mechanism being capable of being electrically connected to the first connection end and the second connection end at the same time to close the switching element when the on-off mechanism is at the first predetermined position, portions of the load element and the switching element other than the operation portion being located inside the housing; the auxiliary circuit is connected between two preset passages in the adapter body, the auxiliary circuit is a passage when the switch element is closed, and the auxiliary circuit is an open circuit when the switch element is disconnected.

According to an aspect of the present disclosure, there is provided an electronic device including: the test tool end of the electronic control unit ECU, the adapter and the vehicle-mounted network bus; one end of an adapter body in the adapter is connected with the ECU, the other end of the adapter body is connected with a test tool end of the vehicle-mounted network bus, when the switch element is closed, the auxiliary circuit is conducted, and a load element in the auxiliary circuit is used as a terminal resistor between a low-level bus and a high-level bus of the test tool end.

The adapter of the embodiment of the disclosure is applicable to various types of ECUs and various development test working conditions thereof, does not need to be frequently replaced, can simplify the operation in the development test process, and improves the efficiency of vehicle-mounted network development test.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing in more detail embodiments of the present disclosure with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the principles of the disclosure and not to limit the disclosure. In the drawings, like reference numbers generally represent like parts or steps.

Fig. 1A is a schematic external structural diagram of an adapter provided in an exemplary embodiment of the present disclosure.

Fig. 1B is an external structural schematic diagram of an adapter provided in another exemplary embodiment of the present disclosure.

Fig. 2 is a schematic connection diagram of an internal auxiliary circuit of an adaptor according to an exemplary embodiment of the disclosure.

Fig. 3A-3B are schematic diagrams illustrating the structure and connection relationship of an internal auxiliary circuit of an adaptor according to an exemplary embodiment of the disclosure.

Fig. 4 is a schematic diagram of connections between two sets of pins inside an adaptor according to an exemplary embodiment of the disclosure.

Fig. 5 is a schematic side view of an adapter body in an adapter provided in an exemplary embodiment of the present disclosure.

Fig. 6 is a schematic structural diagram of a switching element in an adaptor according to an exemplary embodiment of the present disclosure.

Fig. 7 is a block diagram of an electronic device provided in an exemplary embodiment of the present disclosure.

Detailed Description

Hereinafter, example embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a subset of the embodiments of the present disclosure and not all embodiments of the present disclosure, with the understanding that the present disclosure is not limited to the example embodiments described herein.

Summary of the application

The CAN bus comprises two paths, namely a high-level CAN bus (CAN _ H) and a low-level CAN bus (CAN _ L). In the vehicle-mounted network, each ECU is connected to CAN _ H and CAN _ L to realize serial differential transmission of signals. During normal communication, a terminal resistor with a certain resistance value is required to be connected between the CAN _ H and the CAN _ L. In the development and test stage, the terminal resistor is required to be arranged between CAN _ H and CAN _ L in the network architecture simulated by the CAN tool.

In the development stage, some ECUs have the termination resistors built therein, and some ECUs have no termination resistors, according to design requirements. Therefore, in the development and test stage, some ECUs need not be externally connected with the terminal resistor during testing, and some ECUs need to be provided with the corresponding terminal resistor in a path formed by connecting the ECU and the CAN tool during testing.

For example, one type of current adapter may include a direct-connection adapter and a built-in resistive adapter, in which a fixed-resistance terminal resistor is built, and the direct-connection adapter has no terminal resistor. The adapters with the two specifications have applicable working conditions respectively, if the adapters are discussed with the terminal resistor, the direct-connected adapter is only suitable for the ECU with the built-in terminal resistor, and the built-in resistor adapter is only suitable for the working condition that the ECU has no built-in terminal resistor.

In the development and test stage, when different ECUs are connected to the CAN tool, the adapters of different specifications are selected according to whether the ECUs have built-in terminal resistors or not. For example, during actual development and testing, there are generally two conditions that require an adapter to be connected between the ECU and the CAN tool: under the first working condition, if the ECU is internally provided with a terminal resistor, the direct-connected adapter is required to be connected with a CAN tool; under the second working condition, if the ECU has no built-in terminal resistor, the built-in resistor type adapter is required to be connected with the CAN tool, so that normal CAN communication CAN be ensured.

It can be seen that adapters of different specifications need to be used when testing different ECUs. Under the condition that the whole vehicle-mounted network comprises dozens of (for example, 70 or more) ECUs, adapters with different specifications need to be frequently replaced in the development and test process, so that the operation is complex, time and labor are consumed, the efficiency of ECU development and test is influenced, great inconvenience is brought to the development and test of the vehicle-mounted network, and the frequent replacement of the adapters can bring about a plurality of adverse effects such as increased errors, inaccurate test results and the like.

To solve the above technical problem, a basic idea of an embodiment of the present disclosure is to provide an adaptor and an electronic device, where the adaptor includes: the adapter comprises an adapter body and an auxiliary circuit, wherein the adapter body can comprise a shell and two groups of pins, an opening is formed in one side surface of the shell, and the two groups of pins are electrically connected with corresponding pins to form a plurality of parallel passages; the auxiliary circuit includes a switching element and a load element connected in series, an operation portion of the switching element is disposed in an opening of the housing to be exposed to the outside of the housing, and portions of the load element and the switching element other than the operation portion are located inside the housing; the auxiliary circuit is connected between two preset passages in the adapter body, the auxiliary circuit is a passage when the switch element is closed, and the auxiliary circuit is an open circuit when the switch element is disconnected. The adapter of the embodiment of the disclosure CAN selectively connect the load element in the auxiliary circuit to the two paths in the adapter body by conveniently operating the switch element (for example, shifting or pressing the operation part of the switch element), so as to adapt to various connection requirements, especially adapt to the connection requirements of various types of ECUs and CAN tools in the development and test process of the vehicle-mounted network, thereby simplifying the operation in the development and test process of the vehicle-mounted network and improving the test efficiency.

The adapter of the embodiment of the disclosure can be applied to various application scenes needing to use the adapter. In some examples, the adaptor of the embodiments of the present disclosure may be applied in development and testing of modules such as ECUs in vehicle-mounted networks, which include not only the CAN described above, but also, but not limited to, a Local Interconnect Network (LIN), TTP/C, FlexRay, Media Oriented System Transmission (MOST), LVDS, and the like, which employ twisted pair wires as a transmission medium.

Exemplary devices

Fig. 1A is a schematic external structural view of an adaptor provided in an exemplary embodiment of the present disclosure, and fig. 1B is a schematic external structural view of an adaptor provided in another exemplary embodiment of the present disclosure. The adapter of the embodiment of the disclosure can be applied to development and test of a vehicle-mounted network or other similar application scenarios. In one example, the adapter may be used to connect the ECU and CAN tools to be tested.

As shown in fig. 1A and 1B, the adaptor 10 of the embodiment of the present disclosure may include: an adaptor body 11 and an auxiliary circuit 12. The auxiliary circuit 12 is connected between two predetermined paths in the adapter body 11, the auxiliary circuit 12 is a path when the switching element in the auxiliary circuit 12 is closed, and the auxiliary circuit 12 is an open circuit when the switching element in the auxiliary circuit 12 is open.

Therefore, the switch element (for example, an operation part for shifting or pressing the switch element) CAN be conveniently operated to selectively connect the load element in the auxiliary circuit 12 to the two passages in the adapter body 11, so that various connection requirements CAN be met, particularly, the connection requirements of various types of ECUs and CAN tools in the vehicle-mounted network development and test process CAN be met, the operation in the vehicle-mounted network development and test process CAN be simplified, and the test efficiency CAN be improved.

Note that fig. 1A and 1B show an external structure of the adaptor 10. Fig. 1A shows only a part of the operation portion 1211 of the switching element 121 in the auxiliary circuit 12, and the other parts of the auxiliary circuit 12 are not shown in fig. 1A because they are located inside the adaptor body 11. Fig. 1B exemplarily shows the structure of the other end surface of the adapter 10. It should be noted that fig. 1A and 1B are only examples and are not intended to limit the present disclosure.

In the embodiment of the present disclosure, the auxiliary circuit 12 may include a switching element 121 and a load element 122, and the switching element 121 and the load element 122 are connected in series. In some examples, the switching element 121 and the load element 122 may be connected in series by a wire or the like. Fig. 2 schematically shows the structure of the auxiliary circuit 12 inside the adaptor 10 and its connection relationship. In the example of fig. 2, the switching element 121 and the load element 122 in the auxiliary circuit 12 are connected in series between the via 21 and the via 22, the via 21 is formed by wire connection between the corresponding pin 211 and the corresponding pin 212 on the adaptor body 11, and the via 22 may be formed by wire connection between the corresponding pin 221 and the corresponding pin 222 on the adaptor body 11. In a specific application, the passages 21 and 22 may be any two passages within the adapter 10, depending on the specific application scenario. It should be noted that fig. 2 is only an example, and only shows two passages in the adaptor 10, and in practical applications, there may be multiple passages inside the adaptor 10.

In some examples, the predetermined two paths may be configured to connect the in-vehicle network bus. In one example, one of the predetermined two paths may be configured to connect a low-level bus of the in-vehicle network bus, and the other path may be configured to connect a high-level bus of the in-vehicle network bus. In this way, the auxiliary circuit 12 may be connected between the high-level bus and the low-level bus in the vehicle-mounted network test tool (e.g., the above CAN tool) during the development test, so that the load element 122 in the auxiliary circuit 12 may serve as a terminal resistor between the high-level bus and the low-level bus during the test, and the load element 122 may be disconnected or connected between the high-level bus and the low-level bus by turning off or on the switching element 121, thereby adapting to the development test requirements of various ECUs such as an ECU having a built-in terminal resistor, an ECU having no built-in terminal resistor, and the like.

In the embodiment of the present disclosure, the adaptor body 11 may include a housing 111 and two sets of pins. Two groups of pins are respectively arranged on two end faces of the shell 111, the pins in the two groups of pins correspond to each other one by one, and the corresponding pins are electrically connected to form a plurality of parallel passages. In the embodiment of the present disclosure, the corresponding pins in the two groups of pins may be electrically connected in various possible manners. In some examples, the electrical connection between corresponding pins in the two sets of pins may be achieved through a connection line such as a wire.

As illustrated in fig. 1A-1B, the adaptor body, specifically, the DB9 adaptor, may include a male end 112 and a female end 113, where the male end 112 and the female end 113 are respectively disposed on two end surfaces of the housing 111, the male end has one of the two sets of pins, and the female end has the other of the two sets of pins. As shown in fig. 1A-1B, the set of pins in the male end includes 9 pins, which are pin contacts, and which are identified by their locations as 1, 2, 3, 4, 5, 6, 7, 8, 9. The female terminal also includes 9 pins in a set of pins, which are slot-in connectors, also identified by their positions as 1, 2, 3, 4, 5, 6, 7, 8, 9. Fig. 4 is a diagram illustrating an example of the connection between two sets of pins. Pin 1 of the male end 112 corresponds to pin 1 of the female end 113, pin 2 of the male end 112 corresponds to pin 2 of the female end 113, and so on, pin 9 of the male end 112 corresponds to pin 9 of the female end 113, and the male end and the corresponding pin of the female end are electrically connected, so that 9 parallel-connected passages are formed inside the adapter body.

Still taking the example of the adaptor body, specifically the DB9 adaptor, as an example, there are 9 paths in the adaptor body, where the 2 nd path (i.e. the path formed by electrically connecting pin 2 of the male terminal and pin 2 of the female terminal) is agreed to be used for connecting CAN _ L, and the 7 th path (i.e. the path formed by electrically connecting pin 7 of the male terminal and pin 7 of the female terminal) is agreed to be used for connecting CAN _ H. In this example, the 2 nd path and the 7 th path may be taken as the predetermined two paths, that is, the auxiliary circuit 12 may be connected between the 2 nd path and the 7 th path, and the auxiliary circuit 12 includes a switch S and a resistor R, and the resistor R is the load element 122. Fig. 3A and 3B show exemplary connections of the auxiliary circuit 12, in which fig. 3A the switch is closed, the auxiliary circuit 12 is a path, and the load element (i.e., the resistor R in the figure) is a resistor between the 2 nd path and the 7 th path. In fig. 3B, the switch is off, the auxiliary circuit 12 is open, and the load element (i.e., resistor R in the figure) is the resistor between the 2 nd and 7 th paths.

It should be noted that, the adaptor body in the embodiments of the present disclosure is only exemplified by a DB9 adaptor, and the adaptor body may be any device with an adaptor function; it should be noted that the pin mapping means that the functions of the pins are mapped. In a specific application, the arrangement positions of the corresponding pins are generally corresponding to each other for facilitating connection. In some examples, in the adaptor body above, pin 1 of the male end and pin 1 of the female end are defined as carrier Detect (DCD), pin 2 of the male end is defined as RXD (receive (rx) Data), the pin is configured to receive Data sent by an external device, pin 2 of the female end is defined as TXD (transmit (tx) Data), the pin is configured to send Data of the computer to the external device, pin 3 of the male end is defined as TXD (transmit (tx) Data), pin 3 of the female end is defined as RXD (receive (rx) Data), pin 4 of the male end and pin 4 of the female end are both defined as Data terminal Ready (DTR, DataTerminal read), when the pin is high level, the Modem is notified that Data transmission is possible, and the computer is Ready. The pin 5 of the male terminal and the pin 5 of the female terminal are both defined as a logic Ground (GND). The pin 6 of the male terminal and the pin 6 of the female terminal are both defined as Data Set Ready (DSR), and when the pin is at a high level, the pin informs the computer that the Modem is ready to perform data communication. The pin 7 of the male terminal and the pin 7 of the female terminal are both defined as Request To Send (RTS), and the pins are controlled by the computer and used for informing the Modem of transmitting data to the computer immediately; otherwise, the Modem temporarily puts the received data into a buffer area. Pin 8 of the male terminal and pin 8 of the female terminal are both defined as Clear To Send (CTS), and are controlled by the Modem to notify the computer to send data to the Modem. The pin 8 of the male terminal and the pin 8 of the female terminal are both defined as a call Indicator (RI), and the pins are configured to indicate the Modem to notify the computer that a call is coming in, and whether the call is answered or not is determined by the computer.

It should be noted that both ends of the adaptor 10 of the embodiment of the present disclosure may also be a male end or a female end, and the connection relationship of the two groups of pins on both ends is the same as the principle of the above example.

Fig. 5 shows a schematic side view of an adapter body 11 according to an embodiment of the present disclosure. As shown in fig. 5, an opening 114 is formed on one side surface of the housing 111 of the adaptor body 11, so that the operation portion 1211 of the switching element 121 can be exposed through the opening (as shown in fig. 1A), thereby conveniently operating the switching element 121 to selectively connect or disconnect the load to or from the two paths inside the adaptor. In some examples, the size (e.g., length, width, area, etc.) of the opening 114 may be matched with the operation portion 1211 of the switching element 121 in the auxiliary circuit 12. In some examples, the opening 114 may be sized slightly larger than the operating portion 1211 for ease of assembly. In some examples, the shape of the opening 114 may also match the shape of the operating portion 1211. For example, when the operation portion 1211 is a rectangular dial grip, the opening 114 may be rectangular.

In the embodiment of the present disclosure, the switching element 121 may be various types of switches. In some examples, the switch element 121 may be a dial switch with a small size, and since the inner space of the housing 111 is limited and the side surface of the housing is relatively narrow, the use of the dial switch with a small size can effectively save space, and is also convenient for installation and assembly on the adaptor body 11, and the dial switch has a low cost, which is also beneficial to reducing the manufacturing cost of the adaptor. Of course, the switching element 121 may be another type such as a push switch having a small volume.

Fig. 6 exemplarily shows the structure of the switching element 121. It should be noted that fig. 6 is only an example, and a suitable switching element may be adopted in a specific application according to needs, and the type, the model, and the like of the switching element are not limited.

As shown in fig. 6, the switch element 121 may include an operation portion 1211, a first connection end 1212, a second connection end 1213, and an on-off mechanism 1214, the operation portion 1211 is mechanically connected to the on-off mechanism 1214, the first connection end 1212 is electrically connected to the load element 122, the on-off mechanism 1214 is in a first predetermined position when the operation portion 1211 is in the first state, and the on-off mechanism 1214 is capable of being electrically connected to the first connection end 1212 and the second connection end 1213 at the same time to close the switch element when the on-off mechanism 1214 is in the first predetermined position.

In the embodiment of the present disclosure, the operation portion 1211 may be disposed in the opening 114 of the housing 111 to be exposed outside the housing, so as to facilitate the operation of the user. And the load element 122 and the switching element 121 of the auxiliary circuit 12 except for the operation portion 1211 may be provided inside the housing 111.

In some examples, the operation portion 1211 of the switch element 121 may be partially or entirely disposed in the opening 114 of the housing 111 to be at least partially exposed outside the housing 111, so that a user can manually manipulate the state of the switch element 121 by operating the operation portion 1211. In practical applications, the operation portion 1211 may be a toggle handle, a mechanical button, a sliding rod, or other types.

In the embodiment of the present disclosure, the specific manner of mechanical connection between the operation portion 1211 and the on-off mechanism 1214 is not limited. For example, the operation portion 1211 can be movably connected to the on-off mechanism 1214 by a spring, a movable connecting rod, a movable connecting shaft, or other connecting members, so as to drive the on-off mechanism 1214 to move during the movement of itself.

As shown in fig. 6, the on-off mechanism 1214 can be moved to a first predetermined position by the operation portion 1211, and when the on-off mechanism 1214 is located at the first predetermined position, the on-off mechanism 1214 can be electrically connected to the first connection end 1212 and the second connection end 1213 at the same time, so that the switch element 121 is closed. The on-off mechanism 1214 can be moved away from the first predetermined position by the operation portion 1211, and when the on-off mechanism 1214 is located at any position other than the first predetermined position, the first connection end 1212 and the second connection end 1213 are not electrically connected to each other at the same time, so that the switching element 121 is turned off.

In the example of fig. 6, the switching element 121 may further include a case 1215, the on-off mechanism 1214 is housed inside the case 1215, and the first connection end 1212, the second connection end 1213, and the operation portion 1211 are partially housed in the case 1215. In this example, the on-off mechanism 1214 may include a body 31 and a return spring 32, and one end of the return spring 32 is fixed to the lower surface of the body 31 and the other end is fixed to the bottom of the case 1215 of the switching element 121. The upper surface of the main body 31 is provided with a slide rail 35, one end of the operation portion 1211 is embedded into the slide rail 32 and can slide in the slide rail 35, a first contact 33 and a second contact 34 are arranged on the lower surface of the main body 31 at positions corresponding to the first connection end 1212 and the second connection end 1213, the first contact 33 and the first connection end 1212 can be electrically connected when in surface contact, the second contact 34 and the second connection end 1213 can be electrically connected when in surface contact, and the first contact 33 and the second contact 34 can be electrically connected through a wire, a conductor or other similar methods.

As shown by the right arrow in fig. 6, the user can slide the operating portion 1211 to an intermediate position of the slide rail (for example, the position of the operating portion 1211 shown by the gray dashed line in fig. 6) to be in the first state, in which the operating portion 1211 applies a downward pressure to the main body 31 of the on-off mechanism 1214 as shown by the downward arrow in fig. 6, and the main body 31 of the on-off mechanism 1214 moves to a first predetermined position (for example, the position of the main body 31 shown by the gray dashed line in fig. 6) (that is, the position where the first contact 33 contacts with the surface of the first connecting end 1212 and the second contact 34 contacts with the surface of the second connecting end 1213), the return spring 32 is in a compressed state, and the first connecting end 1212 and the second connecting end 1213 are conducted through the first contact 33 and the second contact 34.

If the operating portion 1211 slides to an edge position of the slide rail 35, it is determined that the operating portion is switched to a state other than the first state, the return spring 32 is restored from the compressed state to the natural state, the first contact 33 on the main body 31 is separated from the first connecting end 1212 and/or the second contact 34 is separated from the second connecting end 1213, the main body 31 of the on-off mechanism 1214 is located at a position other than the first predetermined position, and the electrical connection between the first connecting end 1212 and the second connecting end 1213 is broken.

The switching element 121 shown in fig. 6 is merely an example. In practical applications, the switch element 121 may have other structures, for example, a two-gear toggle switch, a three-gear toggle switch, a push switch, etc. may be adopted.

In the embodiment of the present disclosure, the load element 122 may be various types of loads. In some examples, the load element 122 may include: at least one resistor or an electronic component equivalent to a resistor. In this way, the load element 122 may be used with the auxiliary circuit as a pass through to act as a termination resistance between the low level bus and the high level bus in the on-board network bus.

In some examples, the at least one resistor may be at least one variable resistor or an electronic component equivalent to the at least one variable resistor. In this way, the resistance of the load element 122 can be adjusted according to the requirements of specific application scenarios, so that the load element can serve as a terminal resistor between a low-level bus and a high-level bus in various application scenarios or different vehicle-mounted network buses, and the versatility of the adapter is better.

In one example, when the load element 122 is a variable resistor, the resistance of the load element 122 may be adjusted by the switching element 121. In one example, the switch element 121 may further include a third connection terminal, the third connection terminal is connected to the sliding terminal of the load element 122, and the first connection terminal is connected to a fixed terminal of the load element 122, so that the resistor actually connected to the auxiliary circuit 12 is a portion between the fixed terminal and the sliding terminal of the variable resistor, and the sliding terminal is moved by moving the third connection terminal to adjust the connection resistance of the load element 122. In a specific application, the movement of the third connection end can be realized by manually operating the operation portion 1211, so that a user can adjust the resistance value of the load element 122 according to the requirement, and the load element can be adapted to the specific application requirement.

In some examples, in order to make the load element 122 function better as a termination resistor between the low-level bus and the high-level bus, the resistance of the load element 122 when it is a resistor or a variable resistor may be determined by the parasitic capacitance between the low-level bus and the high-level bus. In one example, when the load element 122 is a resistor or a variable resistor, the resistance value of the load element 122 may be between 60 Ω to 120 Ω, so as to improve the anti-interference capability of the CAN bus through the load element 122, ensure that the bus enters the invisible state quickly, and improve the signal quality. In one example, when the load element 122 is a resistor or a variable resistor, the resistance of the load element 122 may be 60 Ω, so as to improve the anti-interference capability of the CAN bus through the load element 122 and ensure that the bus quickly enters the stealth state. In one example, when the load element 122 is a resistor or a variable resistor, the resistance value thereof may be 120 Ω, so as to better improve the signal quality of the CAN bus through the load element 122. In addition, the resistance of the load element 122 may also be 80 Ω, 100 Ω, 110 Ω, etc., which may be selected according to the requirements of the specific application scenario and the characteristics of the vehicle-mounted network bus.

With the known CAN tool-end interface scheme, at most two adapters (e.g., the adapter of the embodiment of the present disclosure plus a direct-connect adapter) are required to cover all the end switching requirements of the ECU. The adapter in the related art needs three adapters of different systems to meet the requirement of the adapter under the same requirement.

The adapter of the embodiment of the disclosure has the following advantages: 1. when the modes of a plurality of target ECU interfaces are the same, whether a terminal resistor exists at the board end of the target ECU can be seen, and a switch on the adapter is directly adjusted to selectively access the terminal resistor or disconnect the terminal resistor, so that various communication requirements are met, and the method is convenient and quick; 2. the use requirements can be met by using fewer adapters, the cost can be effectively reduced, and the waste of manpower and time caused by frequent replacement of the adapters is reduced.

Exemplary electronic device

Next, an electronic apparatus according to an embodiment of the present disclosure is described with reference to fig. 7.

FIG. 7 illustrates a block diagram of an electronic device in accordance with an embodiment of the disclosure.

As shown in fig. 7, the electronic device 20 includes the ECU 11, the adaptor 10 described above, and the test tool side 12 of the in-vehicle network bus. One end of the adapter body in the adapter 10 is connected to the ECU 11, and the other end is connected to the test tool end 12 of the vehicle-mounted network bus.

In some examples, the adaptor 10 may include two paths, one of which is electrically connected to the low-level bus of the tool side 12 of the on-board network bus and the other of which is electrically connected to the high-level bus of the tool side 12 of the on-board network bus.

If the ECU 11 has a terminal resistor built therein, the switching element (not shown) on the adaptor 10 may be turned off without externally connecting the terminal resistor between the low-level bus and the high-level bus of the test tool terminal 12. When the switching element on the adaptor 10 is turned off, the auxiliary circuit in the adaptor 10 is opened, and no load element (not shown) in the auxiliary circuit is connected between the low-level bus and the high-level bus at the test tool 12.

If the ECU 11 does not have a termination resistor built therein, it is necessary to connect the termination resistor externally between the low-level bus and the high-level bus of the test tool 12, and at this time, a switching element (not shown) on the adaptor 10 may be closed. When the switch element on the adaptor 10 is closed, the auxiliary circuit (not shown) in the adaptor 10 is turned on, and the load element (not shown) in the auxiliary circuit is connected between the low-level bus and the high-level bus in the test tool 12, and the load element (not shown) in the auxiliary circuit will serve as a termination resistor between the low-level bus and the high-level bus in the test tool 12.

In some examples, the test tool terminal 12 of the vehicle network bus may be, but is not limited to, a CAN tool terminal, a LIN tool terminal, and the like.

In some examples, the adapter 10 and the interface of the harness end of the test tool may be of the same standard, i.e. both the male end and the female end, and the adapter 10 with both the female end and the male end may be used to adapt and connect the interfaces of the two harness ends. Fig. 7 shows an exemplary connection relationship in the case where the interfaces of the adaptor 10 and the harness end of the test tool are of the same standard.

In some examples, the ECU 11 may include one or more processors and memory. The processor may be, among other things, a Microprocessor (MCU), a Central Processing Unit (CPU), or other form of processing unit having data processing and/or instruction execution capabilities, and may control other components in the ECU 11 to perform desired functions. The memory may include one or more computer program products that may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The volatile memory may include, for example, Random Access Memory (RAM), cache memory (cache), and/or the like. The non-volatile memory may include, for example, Read Only Memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer readable storage medium and executed by the processor 11 to implement the desired functionality of the ECU 11. In addition, the ECU 11 may include any other suitable components depending on the particular application.

The foregoing describes the general principles of the present disclosure in conjunction with specific embodiments, however, it is noted that the advantages, effects, etc. mentioned in the present disclosure are merely examples and are not limiting, and they should not be considered essential to the various embodiments of the present disclosure. Furthermore, the foregoing disclosure of specific details is for the purpose of illustration and description and is not intended to be limiting, since the disclosure is not intended to be limited to the specific details so described.

The block diagrams of devices, apparatuses, systems referred to in this disclosure are only given as illustrative examples and are not intended to require or imply that the connections, arrangements, configurations, etc. must be made in the manner shown in the block diagrams. These devices, apparatuses, devices, systems may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. The words "or" and "as used herein mean, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to".

It is also noted that in the apparatus of the present disclosure, the components may be disassembled and/or reassembled. These decompositions and/or recombinations are to be considered equivalents of the present disclosure.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the disclosure. Thus, the present disclosure is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the disclosure to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.

Claims (10)

1. An adapter, comprising:

the adapter body comprises a shell and two groups of pins, wherein one side surface of the shell is provided with an opening, and the two groups of pins are electrically connected with corresponding pins to form a plurality of parallel passages;

an auxiliary circuit including a switching element and a load element, the switching element and the load element being connected in series, the switching element including an operation portion, a first connection end, a second connection end, and an on-off mechanism, the operation portion of the switching element being disposed in an opening of the housing so as to be exposed outside the housing, the operation portion being mechanically connected to the on-off mechanism, the first connection end being electrically connected to the load element, the on-off mechanism being at a first predetermined position when the operation portion is in a first state, the on-off mechanism being capable of being electrically connected to the first connection end and the second connection end at the same time to close the switching element when the on-off mechanism is at the first predetermined position, portions of the load element and the switching element other than the operation portion being located inside the housing;

the auxiliary circuit is connected between two preset passages in the adapter body, the auxiliary circuit is a passage when the switch element is closed, and the auxiliary circuit is an open circuit when the switch element is disconnected.

2. The adaptor of claim 1, wherein the adaptor body is a DB9 adaptor.

3. The adaptor of claim 1, wherein the load element comprises: at least one resistor or an electronic component equivalent to a resistor.

4. An adaptor according to claim 3, wherein the at least one resistor is a variable resistor or an electronic component equivalent to a variable resistor.

5. An adaptor according to claim 3 or 4, wherein the resistance of the resistor is determined by the parasitic capacitance between the low level bus and the high level bus.

6. An adaptor according to claim 5, wherein the resistance of the resistor is between 60 and 120 Ω.

7. The adaptor of claim 1, wherein corresponding pins of the two sets of pins are electrically connected by a connecting wire.

8. An electronic device, comprising: an Electronic Control Unit (ECU), the adaptor of any one of claims 1 to 7 and a test tool end of a vehicle network bus; one end of an adapter body in the adapter is connected with the ECU, the other end of the adapter body is connected with a test tool end of the vehicle-mounted network bus, when the switch element is closed, the auxiliary circuit is conducted, and a load element in the auxiliary circuit is used as a terminal resistor between a low-level bus and a high-level bus of the test tool end.

9. The electronic device of claim 8, wherein the adapter includes two vias, one of the two vias electrically connected to a low-level bus of a test tool side of the on-board network bus and the other via electrically connected to a high-level bus of a test tool side of the on-board network bus.

10. The electronic device of claim 8, wherein the test tool side of the on-board network bus is a Controller Area Network (CAN) tool side.

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