Testing device
The testing device with multiple electronic load channels and a control unit addresses inefficiencies in eFuse distribution channel testing by enabling simultaneous testing of multiple channels, improving test efficiency and accuracy.
Patent Information
- Application Number
- CN202420627162.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-28
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-03-28
AI Technical Summary
Existing methods for testing electronic fuse (eFuse) distribution channels in power distribution are inefficient and unable to perform fault injection tests, such as overcurrent, and cannot verify distribution-related functional logic in the early project stage.
A testing device with multiple electronic load channels, a switch unit, and a control unit to simultaneously control the coupling or decoupling of these channels with power distribution channels, allowing for efficient testing of multiple channels at once, including static power consumption, startup/shutdown performance, and fault diagnosis.
Enhances test efficiency by allowing simultaneous testing of multiple power distribution channels without real vehicle resources, ensuring accurate and comprehensive testing of eFuse distribution channels.
Smart Images
Figure CN222232582U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of testing technology, and in particular to a testing device. Background Art
[0002] In the related art, a method for testing equipment that uses an eFuse (electronic fuse) distribution channel for power distribution is to connect a power load or a real load to the distribution channel, calculate theoretical parameters based on the parameters of the load, and use an oscilloscope to detect whether the actual parameters meet expectations. This testing method is inefficient. Utility Model Content
[0003] In order to overcome the problems existing in the related art, the present disclosure provides a testing device, which is used to test the power distribution channel unit of the electronic fuse of the device under test, wherein the power distribution channel unit includes at least one power distribution channel, and the power distribution channel is used to output power. The testing device includes:
[0004] A plurality of electronic load channels, each of which corresponds to one of the power distribution channel units;
[0005] A switch unit, used for coupling or decoupling the electronic load channel and the power distribution channel in the power distribution channel unit;
[0006] The control unit is used to control the switch element in the switch unit to switch the switch state, so that the electronic load channel and a distribution channel in the distribution channel unit are switched between a coupling state and a decoupling state.
[0007] Optionally, the power distribution channel unit includes:
[0008] The first power distribution channel;
[0009] A switch element is provided between the first power distribution channel and the electronic load channel, so that the electronic load channel and the first power distribution channel form a one-to-one connection relationship;
[0010] The switch state includes a connected state and a disconnected state.
[0011] Optionally, the power distribution channel unit includes:
[0012] A second power distribution channel and a third power distribution channel, wherein the second power distribution channel and the third power distribution channel can be coupled to the electronic load channel through a switch element;
[0013] The moving contact of the switch element is connected to the electronic load channel, and the first static contact and the second static contact of the switch element are connected to the second power distribution channel and the third power distribution channel respectively;
[0014] The switching state of the switching element includes a first state and a second state, the first state is that the moving contact is coupled with the first stationary contact, and the moving contact is decoupled from the second stationary contact, and the second state is that the moving contact is decoupled from the first stationary contact, and the moving contact is coupled with the second stationary contact.
[0015] Optionally, the switch element includes a first switch element and a second switch element, and the power distribution channel unit includes:
[0016] The fourth power distribution channel and the fifth power distribution channel;
[0017] The fourth power distribution channel can be coupled to the electronic load channel through the first switch element, and the fifth power distribution channel can be coupled to the electronic load channel through the second switch element;
[0018] The switch state includes a connected state or a disconnected state, wherein when the switch state of one of the first switch element and the second switch element is the connected state, the switch state of the other of the first switch element and the second switch element is the disconnected state.
[0019] Optionally, the switching element is a relay.
[0020] Optionally, the control unit is connected to the switch unit via a CAN line or a CANFD line.
[0021] Optionally, the testing device further comprises:
[0022] A collection unit, wherein the input end of the collection unit is connected to the controller of the device under test and the electronic load channel, and the collection unit is used to receive the current data and / or voltage data output by the controller, and the load value of the electronic load;
[0023] A human-computer interaction module is connected to the output end of the acquisition unit, and is used to receive the current data and / or the voltage data, and the load value transmitted by the acquisition unit.
[0024] Optionally, the human-computer interaction module further includes:
[0025] A display unit for displaying the current data and / or the voltage data, and the load value.
[0026] Optionally, the device under test is a domain controller or a power unit.
[0027] Optionally, the testing device further comprises:
[0028] A memory, wherein the memory stores an automated test program;
[0029] The control unit is further used to control the switch element in the switch unit to switch the switch state according to the automatic test program, so that the electronic load channel and a distribution channel in the distribution channel unit are switched between a coupled state and a decoupled state.
[0030] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:
[0031] The present disclosure sets up multiple electronic load channels, each of which corresponds to a distribution channel unit. In this way, the control unit controls the switch unit to switch the switch state, and can simultaneously control the coupling or decoupling of multiple electronic load channels with a distribution channel in the corresponding distribution channel unit. In this way, multiple electronic load channels are used to test multiple distribution channels at the same time, so that the test efficiency is significantly improved.
[0032] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0034] Figure 1 It is a block diagram of a testing device according to an exemplary embodiment.
[0035] Figure 2 It is a schematic diagram showing a first connection mode between an electronic load channel and a power distribution channel unit according to an exemplary embodiment.
[0036] Figure 3 is a schematic diagram showing a second connection method between an electronic load channel and a power distribution channel unit according to an exemplary embodiment.
[0037] Figure 4 is a schematic diagram showing a third connection method between an electronic load channel and a power distribution channel unit according to an exemplary embodiment. DETAILED DESCRIPTION
[0038] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.
[0039] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.
[0040] Currently, for devices that use electronic fuse distribution channels for power distribution, such as the mainstream distribution solutions of OEMs (Original Equipment Manufacturers) in the automotive industry, there are usually two ways to test the eFuse distribution channel. The first method is to connect a power load or a real load to the distribution channel to test the distribution-related control logic, calculate the theoretical parameters based on the load parameters, and use an oscilloscope to detect whether the actual parameters meet expectations. This test method is inefficient and is restricted by the load parameters, so it is impossible to complete fault injection tests such as overcurrent. The second method is to indirectly verify the normal power supply by observing whether the functions of each vehicle are normal through the actual vehicle. This method cannot directly verify the distribution-related functional logic and cannot be tested in the early stage of the project.
[0041] In response to the above problems, the present disclosure provides a testing device for testing the power distribution channel unit of the electronic insurance of the device to be tested, for example, one or more of static power consumption test, startup / dynamic / shutdown performance test, short circuit diagnosis and protection, over-temperature diagnosis and protection, load startup, self-test, etc.
[0042] like Figure 1-4 As shown, the power distribution channel unit includes at least one power distribution channel, and the power distribution channel is used to output power. The testing device includes:
[0043] A plurality of electronic load channels, each of which corresponds to one of the power distribution channel units;
[0044] A switch unit, used for coupling or decoupling the electronic load channel and the power distribution channel in the power distribution channel unit;
[0045] The control unit is used to control the switch element in the switch unit to switch the switch state, so that the electronic load channel and a distribution channel in the distribution channel unit are switched between a coupling state and a decoupling state.
[0046] Among them, the power distribution channel can be a channel in which an electronic fuse is arranged in the device to be tested. Multiple electronic load channels can set specific load values according to the test function load requirements of the device to be tested during actual testing. The load value of each electronic load channel can be the same or different. The load value of the electronic load can be configured by the host computer or the control unit, which can improve the test adaptability of the test device, so that there is no need to manually connect a new load after replacing the device to be tested or the test channel, thereby improving the test efficiency. The switching element in the switch unit can be an ordinary switch or a switch controlled by electromagnetics, such as a relay, a triode, etc. The control unit can be a magnetic coil of a relay, a CPU (Central Processing Unit), an ECU (electronic Control Unit), a single-chip microcomputer, etc., or it can be any controller in the host computer that has the function of executing a preset test program.
[0047] For example, when the control unit controls the switch unit to switch the switch state, the electronic load channel can be coupled or decoupled with a power distribution channel. When the electronic load channel is coupled with the power distribution channel in the power distribution channel unit, the power distribution function of the power distribution channel can be tested.
[0048] The present disclosure sets multiple electronic load channels, each of which corresponds to a distribution channel unit. In this way, the control unit controls the switch unit to switch the switch state, and can simultaneously control the coupling or decoupling of multiple electronic load channels with a distribution channel in the corresponding distribution channel unit. In this way, multiple electronic load channels are used to test multiple distribution channels at the same time, so that the test efficiency is significantly improved. In addition, the test device of the present disclosure can also perform preliminary testing without real vehicle resources, ensuring the convenience of the test procedure.
[0049] In an optional embodiment, the power distribution channel unit includes:
[0050] The first power distribution channel;
[0051] A switch element is provided between the first power distribution channel and the electronic load channel, so that the electronic load channel and the first power distribution channel form a one-to-one connection relationship;
[0052] The switch state includes a connected state and a disconnected state.
[0053] For example, Figure 2 As shown, the first power distribution channel can be coupled to the electronic load channel through a switch element, wherein the moving contact of the switch element is connected to the electronic load channel, and the static contact of the switch element is connected to the output end of the first power distribution channel.
[0054] For example, when the switch state of the switch element is in the connected state, the first power distribution channel is coupled to the electronic load channel, and the first power distribution channel can be tested through the electronic load channel. After the test is completed, the switch state of the switch element can be controlled by the control unit to be in the disconnected state, so that the first power distribution channel is decoupled from the electronic load channel.
[0055] In an optional embodiment, the power distribution channel unit includes:
[0056] A second power distribution channel and a third power distribution channel, wherein the second power distribution channel and the third power distribution channel can be coupled to the electronic load channel through a switch element;
[0057] The moving contact of the switch element is connected to the electronic load channel, and the first static contact and the second static contact of the switch element are connected to the second power distribution channel and the third power distribution channel respectively;
[0058] The switching state of the switching element includes a first state and a second state, the first state is that the moving contact is coupled with the first stationary contact, and the moving contact is decoupled from the second stationary contact, and the second state is that the moving contact is decoupled from the first stationary contact, and the moving contact is coupled with the second stationary contact.
[0059] For example, the same electronic load channel can be used to test multiple distribution channels, and further can be used to test multiple distribution channels with the same load value, such as for testing the second distribution channel and the third distribution channel. Wherein, the moving contacts of the switch element are connected to the electronic load channel, and the static contacts of the switch element are connected to the output end of the first distribution channel.
[0060] like Figure 3 As shown, the switch state of a switch element can be controlled by a control unit to control the distribution channel currently being tested. For example, when the moving contact of the switch element is coupled with the first static contact corresponding to the second distribution channel, the moving contact of the switch element is decoupled from the second static contact corresponding to the third distribution channel. At this time, the electronic load channel is coupled with the second distribution channel through the switch element, and the second distribution channel can be tested through the electronic load channel; when the moving contact of the switch element is coupled with the second static contact, the moving contact of the switch element is decoupled from the first static contact. At this time, the electronic load channel is coupled with the third distribution channel through the switch element, and the third distribution channel can be tested through the electronic load channel.
[0061] For example, the switch state may further include a third state, in which the moving contact is decoupled from the first static contact, and the moving contact is decoupled from the second static contact, that is, the switch element is in an open state. After the test is completed, the control unit may control the switch state of the switch element to the third state, so that both the second power distribution channel and the third power distribution channel are decoupled from the electronic load channel.
[0062] In this way, the same electronic load channel can be used to simultaneously test the second distribution channel in multiple distribution channel units at the first moment, and simultaneously test the third distribution channel in multiple distribution channel units at the second moment, thereby realizing online switching and allocation of electronic load channel resources, and multiple test units reuse the same electronic load channel resources, saving electronic load channel resources.
[0063] In an optional embodiment, the switch element includes a first switch element and a second switch element, and the power distribution channel unit includes:
[0064] The fourth power distribution channel and the fifth power distribution channel;
[0065] The fourth power distribution channel can be coupled to the electronic load channel through the first switch element, and the fifth power distribution channel can be coupled to the electronic load channel through the second switch element;
[0066] The switch state includes a connected state or a disconnected state, wherein when the switch state of one of the first switch element and the second switch element is the connected state, the switch state of the other of the first switch element and the second switch element is the disconnected state.
[0067] For example, the same electronic load channel can test multiple distribution channels through different switch elements, for example, for testing the fourth distribution channel and the fifth distribution channel. The moving contacts of the first switch element and the second switch element are both connected to an electronic load channel, the static contact of the first switch element is connected to the output end of the fourth distribution channel, and the static contact of the second switch element is connected to the output end of the fifth distribution channel.
[0068] For example, in order to ensure that one power distribution channel is tested separately each time and to ensure the accuracy of the test, the switch state of the first switch element and the switch state of the second switch element may be opposite states, such as Figure 4As shown, the switch states of the first switch element and the second switch element can be controlled by the control unit to control the distribution channel currently being tested. For example, when the moving contact of the first switch element is coupled with the static contact corresponding to the fourth distribution channel and the moving contact of the second switch element is decoupled from the static contact corresponding to the fifth distribution channel, the electronic load channel is coupled with the fourth distribution channel through the first switch element, and the electronic load channel is decoupled from the fifth distribution channel. At this time, the fourth distribution channel can be tested through the electronic load channel; when the moving contact of the first switch element is decoupled from the static contact corresponding to the fourth distribution channel and the moving contact of the second switch element is coupled with the static contact corresponding to the fifth distribution channel, the electronic load channel is coupled with the fifth distribution channel through the second switch element, and the electronic load channel is decoupled from the fourth distribution channel. At this time, the fifth distribution channel can be tested through the electronic load channel.
[0069] It is understandable that there are multiple electronic load channels, and the connection method between the electronic load channel and the power distribution channel unit in the same test device may not be limited. Figure 2-4 The three types of connection modes of the electronic load channels and the distribution channel unit shown may include only at least one of them, or they may exist at the same time, and the control modes do not conflict. In the case where the three connection modes exist at the same time, for example, the control unit can control the coupling of the first distribution channel with its corresponding electronic load channel according to the first control signal, and control the coupling of the second distribution channel with its corresponding electronic load channel, and control the coupling of the fourth distribution channel with its corresponding electronic load channel. At this time, the first distribution channel, the second distribution channel and the fourth distribution channel can be tested at the same time. For another example, the control unit can control the decoupling of the first distribution channel with its corresponding electronic load channel according to the second control signal, and control the coupling of the third distribution channel with its corresponding electronic load channel, and control the coupling of the fifth distribution channel with its corresponding electronic load channel. At this time, the third distribution channel and the fifth distribution channel can be tested at the same time. In this way, through two control signals, different distribution channels corresponding to the three connection modes can be tested at the same time.
[0070] It should be noted that the control signal in the present disclosure is based on the existing automated testing program in the prior art to control the switching state of the switching element, and does not involve any modification to the content of the automated testing program. The automated testing program in the prior art will not be described in detail here.
[0071] In an optional embodiment, the switching element is a relay.
[0072] In an optional embodiment, the control unit is connected to the switch unit via a CAN line or a CANFD line.
[0073] The control unit may send a control signal to the switch unit via a CAN line or a CANFD line, so that the control unit controls the switch element in the switch unit to switch the switch state according to the control signal.
[0074] In an optional embodiment, the testing device further includes:
[0075] A collection unit, wherein the input end of the collection unit is connected to the controller of the device under test and the electronic load channel, and the collection unit is used to receive the current data and / or voltage data output by the controller, and the load value of the electronic load;
[0076] A human-computer interaction module is connected to the output end of the acquisition unit, and is used to receive the current data and / or the voltage data, and the load value transmitted by the acquisition unit.
[0077] For example, the current data and / or voltage data of the controller of the device to be tested, as well as the load value of the electronic load, can be collected by the collection unit, and the current data and / or voltage data, as well as the load value of the electronic load can be transmitted to the tester through the human-computer interaction module. For example, numbers, waveforms, etc. can be displayed on the display screen. The tester can determine the state of the distribution channel based on the current data and / or voltage data, and the load value of the electronic load, thereby testing the distribution channel.
[0078] In an optional embodiment, the human-computer interaction module further includes:
[0079] A display unit for displaying the current data and / or the voltage data, and the load value.
[0080] For example, the display unit may be a display screen, such as an LED display screen or a display of a host computer. The display unit is used to display current data and / or voltage data, and load values, so that testers can intuitively view the current data and / or voltage data, and load values.
[0081] In an optional embodiment, the device under test is a domain controller or a power unit.
[0082] For example, the device under test can be an independent automotive domain controller or power unit, or a power unit (IPU) or domain controller installed on the entire vehicle. eFuse electronic fuses are arranged in multiple key channels in the device under test to replace traditional vehicle fuse boxes to achieve better intelligent control of power, load, power supply, etc.
[0083] In an optional embodiment, the testing device further includes:
[0084] A memory, wherein the memory stores an automated test program;
[0085] The control unit is further used to control the switch element in the switch unit to switch the switch state according to the automatic test program, so that the electronic load channel and a distribution channel in the distribution channel unit are switched between a coupled state and a decoupled state.
[0086] Among them, the automated test program is a program pre-stored in the memory. When testing the device to be tested, the tester can trigger the automated test program to run so that the electronic load channel and a distribution channel in the distribution channel unit are switched between a coupled state and a decoupled state. In this process, the data tested before and after switching the switch state can be collected by the acquisition unit and transmitted to the memory for storage.
[0087] As a specific example, see Figure 1-4 , wherein the test device is used to test a domain controller, the domain controller includes m distribution channels, specifically distribution channel 1 to distribution channel m, at least one distribution channel can be combined into a distribution channel unit, and the test device includes:
[0088] The electronic load includes n load channels, specifically load channel 1 to load channel n;
[0089] The switch module includes a plurality of switch units, and each electronic load channel can be coupled with a distribution channel in a distribution channel unit through a switch unit to form a test channel;
[0090] The host computer includes a control unit, which is used to execute the automated test process according to the automated test program stored in the host computer memory to control the switch states of multiple switch units in the switch module, so that each electronic load channel and a corresponding distribution channel in the distribution channel unit are switched between a coupled state and a decoupled state. Among them, the power-on and power-off conditions of the distribution channel can be simulated by the CANFD signal of the host computer and transmitted to the domain controller, and the power-on and power-off functions of the distribution channel can also be tested.
[0091] Wherein, m and n are both positive integers, and m can be greater than or equal to n, or less than n. When m is greater than n, one load channel can correspond to more than one distribution channel, that is, the load channel can be reused. For example, Figure 3 and Figure 4 When n is greater than m, some electronic load channels are in an idle state. When m is equal to n, the load channels and distribution channels can correspond one to one, such as Figure 2Structure shown. In addition, the load value of the electronic load and the current data and voltage data of the domain controller are collected by the collection unit (not shown in the figure), and are transmitted to the host computer. After the human-computer interaction module of the host computer receives the data, the data can be displayed on the display of the host computer. Among them, the collection unit is arranged in the slave computer, and the operating system carried by the slave computer can communicate with the host computer, and can also communicate with the electronic load, and can specifically communicate through Ethernet. For example, the operating system of the slave computer receives the test instruction of the host computer test program, and can configure the load value of each electronic load channel in the electronic load, realize the different test conditions of controlling multiple electronic loads at the same time, and realize the online flexible configuration of the load current.
[0092] Through the above scheme, basic functional testing of the distribution channel can be achieved. For example, fault diagnosis testing can be completed by simulating fault injection. Secondly, automated testing can be achieved through automated test scripts, which greatly improves the test efficiency. Through the coupling state of the distribution unit and the electronic load channel in the distribution channel unit, the electronic load channel can be reused to reduce the resource cost of the electronic load. In addition, this scheme can complete sufficient testing of the distribution module in the early stage of the project.
[0093] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the present disclosure. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.
[0094] The above descriptions are merely embodiments of the present disclosure and are not intended to limit the patent scope of the present disclosure. Any equivalent structure or equivalent process transformation made using the contents of the present disclosure specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present disclosure.
Claims
1. A testing device, characterized in that: The testing device is used to test the power distribution channel unit of the electronic fuse of the device under test, the power distribution channel unit includes at least one power distribution channel, and the power distribution channel is used to output power. The testing device includes: A plurality of electronic load channels, each of the electronic load channels corresponds to one of the power distribution channel units; A switch unit, used for coupling or decoupling the electronic load channel and the power distribution channel in the power distribution channel unit; The control unit is used to control the switch element in the switch unit to switch the switch state, so that the electronic load channel and a distribution channel in the distribution channel unit are switched between a coupling state and a decoupling state.
2. The testing device according to claim 1, characterized in that: The power distribution channel unit comprises: The first power distribution channel; A switch element is provided between the first power distribution channel and the electronic load channel, so that the electronic load channel and the first power distribution channel form a one-to-one connection relationship; The switch state includes a connected state and a disconnected state.
3. The testing device according to claim 1 or 2, characterized in that: The power distribution channel unit comprises: A second power distribution channel and a third power distribution channel, wherein the second power distribution channel and the third power distribution channel can be coupled to the electronic load channel through a switch element; The moving contact of the switch element is connected to the electronic load channel, and the first static contact and the second static contact of the switch element are connected to the second power distribution channel and the third power distribution channel respectively; The switching state of the switching element includes a first state and a second state, the first state is that the moving contact is coupled with the first stationary contact, and the moving contact is decoupled from the second stationary contact, and the second state is that the moving contact is decoupled from the first stationary contact, and the moving contact is coupled with the second stationary contact.
4. The testing device according to claim 1 or 2, characterized in that: The switch element includes a first switch element and a second switch element, and the power distribution channel unit includes: The fourth power distribution channel and the fifth power distribution channel; The fourth power distribution channel can be coupled to the electronic load channel through the first switch element, and the fifth power distribution channel can be coupled to the electronic load channel through the second switch element; The switch state includes a connected state or a disconnected state, wherein when the switch state of one of the first switch element and the second switch element is the connected state, the switch state of the other of the first switch element and the second switch element is the disconnected state.
5. The testing device according to claim 1, characterized in that: The switch element is a relay.
6. The testing device according to claim 1, characterized in that: The control unit is connected to the switch unit via a CAN line or a CANFD line.
7. The testing device according to claim 1, characterized in that: The testing device also includes: A collection unit, wherein the input end of the collection unit is connected to the controller of the device under test and the electronic load channel, and the collection unit is used to receive the current data and / or voltage data output by the controller, and the load value of the electronic load; A human-computer interaction module is connected to the output end of the acquisition unit, and is used to receive the current data and / or the voltage data, and the load value transmitted by the acquisition unit.
8. The testing device according to claim 7, characterized in that: The human-computer interaction module also includes: A display unit for displaying the current data and / or the voltage data, and the load value.
9. The testing device according to claim 1, characterized in that: The device under test is a domain controller or a power unit.
10. The testing device according to claim 1, characterized in that: The testing device also includes: A memory, wherein the memory stores an automated test program; The control unit is further used to control the switch element in the switch unit to switch the switch state according to the automatic test program, so that the electronic load channel and a distribution channel in the distribution channel unit are switched between a coupled state and a decoupled state.