Multi-interface identification circuit, interface assembly and automatic test equipment
By designing a multi-interface identification circuit in an automatic test equipment, and using isolated transmission and signal conversion circuits to identify the safety identification level of the connector, the problem of multi-connector plug-in errors is solved, and cost-effectiveness and hardware security guarantees are achieved. .
Patent Information
- Application Number
- CN202323527020.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-22
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2033-12-22
AI Technical Summary
In existing automatic testing equipment, multiple connectors with the same but incompatible structures are easily inserted incorrectly during the deployment and maintenance of the entire machine, resulting in hardware damage. The common anti-fire design cost is high, especially in multi-connector scenarios. A different anti-fire design is required for each connector, resulting in an increase in total cost.
Design a multi-interface identification circuit, including an isolated transmission circuit, a signal conversion circuit and a control circuit, and by receiving and converting the safety marking level of the connector, determining whether each connector matches, and presenting the results through the indication signal, avoiding each The connectors need to be equipped with different anti-dust designs.
It realizes accurate identification of the matching status of multiple connectors without increasing costs, reduces product costs, and improves the reliability of overall machine deployment and maintenance.
Smart Images
Figure CN222212859U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of automatic testing technology, and in particular, relates to a multi-interface identification circuit and automatic testing equipment. Background Art
[0002] Some automatic test equipment (ATE) or large backplanes with multiple identical first connectors have the same connector size and non-foolproof structure. The docking cables are also compatible with each other, but the circuits inside the connectors are not compatible. If there is no silkscreen marking, it is easy to make mistakes in insertion, which makes it difficult to deploy and maintain the whole machine. Misconnection of signal cables and power cables can also cause hardware damage.
[0003] In response to the above problems, there are three common foolproof designs for single connectors: the first is from the structural aspect, that is, the structural design of the connector is foolproof, and different connectors use different structures; the second is to set up a matching loop in the docking connectors, which will only be powered on after connection, and will not be powered on if the connection is wrong; the third is to use different colors to identify different connectors. The above are all single connector foolproof designs. If applied to multiple connectors, in order to prevent multiple connectors from being mixed, different foolproof designs need to be set for each connector, which will greatly increase the cost. Utility Model Content
[0004] The purpose of the present application is to provide a multi-interface identification circuit and automatic testing equipment, aiming to solve the problem in the related art that common fool-proof designs for multiple connectors result in excessively high costs.
[0005] In the first aspect, an embodiment of the present application provides a multi-interface identification circuit, which is connected to multiple first connectors, and includes an isolation transmission circuit, a signal conversion circuit and a control circuit. The isolation transmission circuit is connected to the multiple first connectors, and is used to receive the safety identification level input by the second connector plugged into each of the first connectors, and output a corresponding identification level signal; the signal conversion circuit is connected to the isolation transmission circuit, and is used to output a corresponding communication signal that combines each of the safety identification levels based on the received identification level signal; the control circuit is connected to the signal conversion circuit, and is used to output an indication signal based on the communication signal, and the indication signal is used to indicate whether the second connector plugged into the multiple first connectors matches.
[0006] In one embodiment, the isolation transmission circuit is connected to some pins of the first connector.
[0007] In one embodiment, the first connector includes a signal connector, and the portion of pins includes three pins.
[0008] In one embodiment, the first connector comprises a power connector, and the portion of pins comprises two pins.
[0009] In one embodiment, the isolation transmission circuit is further used to perform level conversion on the safety identification level to obtain an identification level signal that can be recognized by the signal conversion circuit.
[0010] In one embodiment, the isolation transmission circuit includes a level conversion chip, input pins of the level conversion chip are respectively connected to part of pins of each of the first connectors, and output pins of the level conversion chip are connected to the signal conversion circuit.
[0011] In one embodiment, the signal conversion circuit includes a serial port chip, the input pins of the serial port chip are respectively connected to the output pins of the level conversion chip, and the input pins of the serial port chip are connected to the control circuit; the serial port chip includes an I2C serial port chip, an SPI serial port chip or a UART serial port chip.
[0012] In one embodiment, an indication circuit is further included, which is connected to the control circuit and is used to light up a corresponding indicator light according to the indication signal.
[0013] In a second aspect, an embodiment of the present application further provides an interface component, comprising at least one connector and the multi-interface identification circuit as described above.
[0014] In a third aspect, an embodiment of the present application further provides an automatic testing device, comprising a plurality of connectors and the multi-interface identification circuit as described above.
[0015] Compared with the related art, the embodiments of the present application have the following beneficial effects: the inventive concept of the multi-interface identification circuit provided in the embodiments of the present application is that by configuring each second connector plugged into each first connector, by setting the safety identification level of each connector, the isolation conversion circuit is used for isolation conversion, and after the signal conversion circuit converts the signal, the control circuit can identify the combined safety identification level from the communication signal transmitted by the signal conversion circuit to determine whether each second connector matches each first connector one-to-one, and present the result through an indication signal, so there is no need to set a different anti-foolproof design for each connector, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 A schematic diagram of the structure of a multi-interface identification circuit provided in an embodiment of the present application;
[0017] Figure 2 for Figure 1 A circuit diagram of a first connector in a multi-interface identification circuit is shown;
[0018] Figure 3for Figure 1 A schematic diagram of an isolation transmission circuit in a multi-interface identification circuit is shown;
[0019] Figure 4 for Figure 1 A schematic diagram of a signal conversion circuit in a multi-interface identification circuit is shown. DETAILED DESCRIPTION
[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0021] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0022] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present application.
[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically defined.
[0024] like Figure 1 As shown, an embodiment of the present application provides a multi-interface identification circuit suitable for when multiple interfaces (or connectors) are plugged in simultaneously, which can simultaneously determine whether multiple interfaces are correctly plugged in one by one, and generally the multiple interfaces have the same specifications, and other fool-proof designs are not set or do not need to be set.
[0025] The multi-interface identification circuit is connected to the plurality of first connectors 11 , and includes an isolation transmission circuit 110 , a signal conversion circuit 120 and a control circuit 130 .
[0026] The isolation transmission circuit 110 is connected to the plurality of first connectors 11 , and is used for receiving the safety identification level inputted by the second connectors 12 plugged into the first connectors 11 , and outputting a corresponding identification level signal.
[0027] The signal conversion circuit 120 is connected to the isolation transmission circuit 110 and is used to output a corresponding communication signal combining various safety identification levels according to the received identification level signal.
[0028] The control circuit 130 is connected to the signal conversion circuit 120 and is used to output an indication signal according to the communication signal, where the indication signal is used to indicate whether the second connector 12 plugged into the plurality of first connectors 11 matches.
[0029] It is understood that the first connector 11 and the second connector 12 are adapted, one of which is a plug and the other is a socket. The control circuit 130 compares the simple data containing the communication signal and representing the combination of various safety identification levels with the preset correct data, which is the application of conventional data identification means.
[0030] In the embodiment of the present application, the preset safety identification levels of multiple connectors are combined as the basis for anti-foolproofing judgment. In this way, it can be determined at the same time whether multiple connectors are correctly plugged in without the need for anti-foolproofing design for each connector, which greatly saves product costs.
[0031] In one embodiment, the isolation transmission circuit 110 is connected to some pins of the first connector 11. In this embodiment, some pins of each first connector 11 are configured as pins for fixed transmission safety identification levels, and each first connector 11 also has a fixed safety identification level. Several first connectors 11 are combined to obtain a set of fixed and unique safety identification levels. If the safety identification level is the same as the configured one, it can be determined whether the first connectors 11 are correctly plugged in.
[0032] In one embodiment, the first connector 11 includes a signal connector, and some of the pins of the signal connector include three pins; the first connector 11 includes a power connector, and some of the pins of the power connector include two pins. The signal connector uses three pins to transmit the safety identification level, and the power connector uses two pins to transmit the safety identification level.
[0033] For example, a backplane 200 is tested, and four (connectors) identical acquisition cards 100 are matched to the backplane 200. Each acquisition card 100 has three first connectors 11 (including two signal connectors and one power connector), and the three first connectors 11 are respectively connected to the three second connectors 12 on the backplane 200. Each acquisition card 100 is provided with a multi-interface identification circuit provided in an embodiment of the present application, and each multi-interface identification circuit is connected to the three first connectors 11.
[0034] Specifically, the isolation transmission circuit 110 is connected to three pins of each signal connector and two pins of the power connector, that is, three pins are reserved for interface identification in each signal connector and two pins are reserved for interface identification in each power connector.
[0035] See also Figure 2 , showing that in an example of the present application, an acquisition card 100 uses two signal connectors J13 and J14 and a power connector J15, and both are 2×40P connectors.
[0036] Among them, the 66th pin, the 68th pin, and the 70th pin of the two signal connectors J13 and J14 are selected to transmit the safety identification level; the 66th pin and the 68th pin of the power connector J15 are selected to transmit the safety identification level. A total of 8 fixed pins are set on an acquisition card 100 to transmit the safety identification level.
[0037] The embodiment of the present application only takes three first connectors 11 as an example. The specific implementation process is not limited to the number and interface form of the connectors. In principle, designs similar to this circuit structure fall within the scope of the technical solution of the present application.
[0038] In one embodiment, the isolation transmission circuit 110 is further used to perform level conversion on the safety identification level to obtain an identification level signal that can be recognized by the signal conversion circuit 120 .
[0039] For example, if the safety identification level transmitted by the connector is 2.5V, the isolation transmission circuit 110 is required to convert the safety identification level into a 3.3V identification level signal that can be recognized by the signal conversion circuit 120, thereby ensuring that the safety identification level can be successfully transmitted and improving its reliability.
[0040] In one embodiment, the isolation transmission circuit 110 includes a level conversion chip, the input pins of the level conversion chip are respectively connected to some pins of each first connector 11 , and the output pins of the level conversion chip are connected to the signal conversion circuit 120 .
[0041] See also Figure 3, showing that in an example of the present application, the isolation transmission circuit 110 includes two level conversion chips U1 and U2, each level conversion chip U1 / U2 is respectively connected to four fixed pins of the first connector 11, receives four safety identification levels, and outputs four identification level signals.
[0042] Among them, the input side power pin VCCA of the level conversion chip U1 and U2 is connected to the 2.5V working power supply to adapt the signal transmission of the connector; the output side power pin VCCB of the level conversion chip U1 and U2 is connected to the 3.3V working power supply to adapt the signal transmission of the signal conversion circuit 120, and the 2.5V safety identification level is raised to the 3.3V identification level signal so that the signal conversion circuit 120 can recognize it.
[0043] The level conversion chips U1 and U2 are also provided with filter capacitors C1 to C4 on the input side power supply pin VCCA and the output side power supply pin VCCB connected to 3.3V, respectively, for filtering the working power supply.
[0044] In one embodiment, the signal conversion circuit 120 includes a serial port chip, the input pins of the serial port chip are respectively connected to the output pins of the level conversion chip, and the input pins of the serial port chip are connected to the control circuit 130. The serial port chip combines the eight identification level signals, converts them into digital signals of corresponding specifications, and transmits them to the control circuit 130. The digital signal can meet the format / protocol of a two-wire serial bus (Inter-Integrated Circuit, I2C), a serial peripheral interface (Serial Peripheral interface, SPI) or a universal asynchronous receiver / transmitter (Universal Asynchronous Receiver / Transmitter, UART).
[0045] In one embodiment, the serial port chip includes an I2C serial port chip, an SPI serial port chip or a UART serial port chip.
[0046] See also Figure 3 , showing that in an example of the present application, the serial port chip includes an I2C serial port chip U4, and the 8 input pins P00~P77 of the I2C serial port chip U4 are respectively connected to the 8 output pins of the level conversion chips U1 and U2, and the output of the I2C serial port chip U4 and SDA and SCL are connected to the control circuit 130.
[0047] Furthermore, a power pin VCC of the I2C serial port chip U4 is connected to a 3.3V working power supply and is connected to filter capacitors C5 and C6.
[0048] The control circuit 130 is a circuit built on the basis of a microprocessor, which may be a microcontroller unit (MCU), or other general-purpose controller, central processing unit (CPU), digital signal controller (DSP), application specific integrated circuit (ASIC), or field-programmable gate array (FPGA).
[0049] In one embodiment, the multi-interface identification circuit further includes an indication circuit, which is connected to the control circuit 130 and is used to light up a corresponding indicator light according to an indication signal.
[0050] The indication circuit can set a corresponding number of indicator lights according to the number of first connectors 11 or the number of fixed pins used to transmit the safety identification level. According to the above example, if one acquisition card 100 is provided with three first connectors 11, three indicator lights are provided to indicate whether the three first connectors 11 are correctly plugged in. Alternatively, eight indicator lights are provided to indicate whether the eight fixed pins are correctly connected. The indicator lights are, for example, LED lights.
[0051] In one example, different fixed pins of the second connectors 12 of the configuration backplane 200 are set with different security identification levels. The second connector 12 is plugged into the first connector 11 of the acquisition card 100. Each acquisition card 100 has 3 first connectors. All identification bits of the 3 first connectors 11 form an 8-bit security identifier (Security Identifiers, SID) according to the following table. After the isolation transmission and level conversion of the isolation transmission circuit 110, it is connected to the 8Bite serial port chip, and then the 8Bite I / O level state is read through the control circuit 130 to obtain the SID number. Each acquisition card 100 has and only has one set of correct connection methods as shown in the following table. After the control circuit 130 reads the SID, the read ID status can be seen through the indication circuit (such as the display screen of the host computer). The index light can also be used to determine whether each cable is connected correctly, thereby adjusting the cable slot line sequence. In the absence of physical anti-foolproofing, multi-interface identification can be achieved.
[0052]
[0053] In a second aspect, an embodiment of the present application further provides an interface component, comprising at least one connector and the above multi-interface identification circuit.
[0054] In a third aspect, an embodiment of the present application further provides an automatic testing device, comprising a plurality of connectors and the multi-interface identification circuit as described above.
[0055] Compared with the related art, the embodiments of the present application have the following beneficial effects: the inventive concept of the multi-interface identification circuit provided in the embodiments of the present application is that by configuring each second connector 12 plugged into each first connector 11, by setting the safety identification level of each connector, the isolation conversion circuit is used for isolation conversion, and after the signal conversion circuit 120 converts the signal, the control circuit 130 can identify the combined safety identification level from the communication signal transmitted by the signal conversion circuit 120 to determine whether each second connector 12 matches each first connector 11 one by one, and present the result through an indication signal.
[0056] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.
Claims
1. A multi-interface identification circuit connected to a plurality of first connectors, characterized in that: It includes an isolation transmission circuit, a signal conversion circuit and a control circuit, wherein the isolation transmission circuit is connected to the plurality of first connectors, and is used to receive the safety identification level input by each second connector plugged into each first connector, and output a corresponding identification level signal; The signal conversion circuit is connected to the isolation transmission circuit, and is used to output a corresponding communication signal that combines each of the safety identification levels based on the received identification level signal; the control circuit is connected to the signal conversion circuit, and is used to output an indication signal based on the communication signal, and the indication signal is used to indicate whether each of the second connectors plugged into each of the first connectors is matched one-to-one.
2. The multi-interface identification circuit according to claim 1, characterized in that: The isolation transmission circuit is connected to some pins of the first connector.
3. The multi-interface identification circuit according to claim 2, characterized in that: The first connector includes a signal connector, and the portion of pins includes three pins.
4. The multi-interface identification circuit according to claim 2, characterized in that: The first connector includes a power connector, and the portion of pins includes two pins.
5. The multi-interface identification circuit according to any one of claims 2 to 4, characterized in that: The isolation transmission circuit is also used to perform level conversion on the safety identification level to obtain an identification level signal that can be recognized by the signal conversion circuit.
6. The multi-interface identification circuit according to claim 5, characterized in that: The isolation transmission circuit includes a level conversion chip, the input pins of the level conversion chip are respectively connected to part of the pins of each of the first connectors, and the output pins of the level conversion chip are connected to the signal conversion circuit.
7. The multi-interface identification circuit according to claim 6, characterized in that: The signal conversion circuit includes a serial port chip, the input pins of the serial port chip are respectively connected to the output pins of the level conversion chip, and the input pins of the serial port chip are connected to the control circuit; the serial port chip includes an I2C serial port chip, an SPI serial port chip or a UART serial port chip.
8. The multi-interface identification circuit according to claim 1, characterized in that: It also includes an indication circuit, which is connected to the control circuit and is used to light up a corresponding indicator light according to the indication signal.
9. An interface component, characterized in that: The device comprises at least one connector and the multi-interface identification circuit according to any one of claims 1 to 8.
10. An automatic testing device, characterized in that: The invention comprises a plurality of connectors and a multi-interface identification circuit as claimed in any one of claims 1 to 8.