Fault injection board based on serial bus RS485 and signal conditioning box

Abstract

The utility model relates to a fault injection card, concretely relates to a fault injection board card and signal conditioning box based on serial bus RS485. Mainly solve the technical problem that the existing fault injection board card cannot be independently installed in the signal conditioning box, increases the signal switching frequency, and the price is higher. The fault injection card includes injection board card body and installation baffle, is provided with electric interface, relay driver, signal module, fault excitation module on injection board card body, electric interface includes power supply interface, communication interface, signal interface and fault excitation interface, injection board card body is assembled with installation baffle, and is installed in the card slot of signal conditioning box through installation baffle, injection board card body is made into with standard 3U printed board, electric interface adopts DIN96 connector, communication interface adopts RS485 communication interface, and communication interface is connected with external RS485 control bus. The utility model discloses the fault injection card of not needing to rely on cPCI / PXI industrial computer case, uses more flexible, and the signal switching frequency is less.

Description

Technical Field

[0001] This utility model relates to a fault injection card, specifically a fault injection board and signal conditioning box based on the RS485 serial bus. Background Technology

[0002] Fault injection is a reliability verification technique that deliberately introduces faults into a system through controlled experiments and observes the system's behavior under these faults. This technique is primarily used to verify the reliability and stability of a system. By simulating various possible failure scenarios, it tests whether the system can perform as expected, thereby improving the quality of the software system. Fault injection was initially used primarily for reliability testing in the aerospace industry, but its application has now expanded to multiple fields.

[0003] The electric drive controller board-level test unit project and the hardware loop integrated test platform project require fault injection functionality in the test equipment. Currently available technical solutions involve fault injection boards. However, these boards require a cPCI or PXI chassis for support and cannot be installed independently in a signal conditioning box, thus increasing the number of signal switching operations. Furthermore, these boards are relatively expensive. Utility Model Content

[0004] To address the technical problem that existing fault injection boards cannot be independently installed in signal conditioning boxes, thus increasing the number of signal transfers, this invention provides a fault injection board and signal conditioning box based on a serial bus RS485.

[0005] To achieve the above objectives and complete the above-mentioned utility model concept, the present utility model adopts the following technical solution: A fault injection board based on RS485 serial bus includes an injection board body; the injection board body is provided with an electrical interface, a relay driver, a signal module and a fault excitation module; the electrical interface includes a power supply interface, a communication interface, a signal interface and a fault excitation interface; The power supply interface is used to connect to an external power supply. The electrical interface is connected to the relay driver; the relay driver is connected to the signal module and the fault excitation module, and is used to output signals and inject fault excitations according to control commands. The signal interface is used to connect to the device under test and the test equipment; The fault excitation interface is used to connect to an external fault excitation source; Its special feature is: It includes a mounting baffle disposed at one end of the injection board body; the injection board body is assembled with the mounting baffle and installed in the slot of the signal conditioning box through the mounting baffle; The injection board body is made of a standard 3U printed circuit board; The electrical interface uses a DIN96 connector and is installed at the other end of the injection board body; The communication interface adopts an RS485 communication interface; the communication interface is connected to an external RS485 control bus and is used to receive control commands input from the external RS485 control bus.

[0006] Furthermore, the signal module includes 32 signal channels; the fault excitation module includes 3 fault excitation channels; Each of the aforementioned signal channels is equipped with 3 relays, and each of the aforementioned fault excitation channels is equipped with 1 relay; The relay driver is electrically connected to the control terminals of the 96 relays in the signal channel and the 3 relays in the fault excitation channel.

[0007] Furthermore, a plurality of first through holes are provided on one side edge of the injection board body, and a plurality of first screw holes are provided on the mounting baffle; the plurality of first screw holes correspond to the plurality of first through holes; the injection board body is assembled with the mounting baffle by screws.

[0008] Furthermore, there are two of each of the first through hole and the first screw hole; The two first through holes are respectively disposed on both sides of one end face of the injection board body along the width direction; The mounting baffle has two second through holes at both ends along its length; the inner side of the mounting baffle has two L-shaped mounting plates, and one end of each mounting plate has a second screw hole. The two mounting plates are assembled with the mounting baffle using screws through two second through holes and two second screw holes; The two first screw holes are respectively located at the other end of the two mounting plates (25); The mounting baffle is provided with two third through holes at both ends along its length. The mounting baffle is installed in the signal conditioning box using screws through the two third through holes.

[0009] Meanwhile, this utility model also provides a signal conditioning box, including a conditioning box body and multiple crossbeams; Multiple crossbeams are arranged parallel to each other inside the conditioning box body, and multiple slots are arranged vertically between two adjacent crossbeams. The multiple slots are evenly distributed along the length of the crossbeams. Its special feature is: Each of the aforementioned card slots is equipped with a fault injection board based on the RS485 serial bus, and the injection board body is connected to the conditioning box body through a mounting baffle.

[0010] The beneficial effects of this utility model are: 1. The fault injection card of this utility model does not rely on a cPCI / PXI industrial control computer chassis, making it more flexible in use.

[0011] 2. The fault injection card of this utility model is installed in the signal conditioning box, which reduces the number of signal switching and the amount of cable used, making signal connection more convenient and simple.

[0012] 3. The fault injection card of this utility model reduces project cost budget and shortens the procurement cycle. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the injection board body in an embodiment of a fault injection board based on a serial bus RS485 according to this utility model; Figure 2 This is a schematic diagram of the electrical interface connection in an embodiment of a fault injection board based on a serial bus RS485 according to this utility model; Figure 3 This is a schematic diagram of the connection structure between the injection board body and the mounting baffle in an embodiment of a fault injection board based on a serial bus RS485 according to this utility model. Figure 4 This is a schematic diagram of the mounting baffle in an embodiment of a fault injection board based on a serial bus RS485 of this utility model. a is the front view and b is the left view. Figure 5 This is an installation diagram of a fault injection board and signal conditioning box based on the RS485 serial bus of this utility model. Figure 6 This is a schematic diagram illustrating the working principle of a fault injection board based on the RS485 serial bus according to this utility model.

[0014] The attached figures are labeled as follows: 1-Injection board body, 11-Electrical interface, 12-Relay driver, 13-Signal module, 14-Fault excitation module, 15-Through hole; 2- Mounting baffle, 21- First screw hole, 22- Second through hole, 23- Second screw hole, 24- Third through hole, 25- Mounting plate; 3-Crossbeam, 4-Slot. Detailed Implementation

[0015] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] This utility model provides a fault injection board based on a serial bus RS485, such as... Figure 1 and Figure 3 As shown, the fault injection board mainly includes an injection board body 1 and a mounting baffle 2 disposed at one end of the injection board body 1.

[0017] The injection board body 1 is made of a standard 3U printed circuit board, which measures 160mm in length and 100mm in width. The injection board body 1 is equipped with an electrical interface 11, a relay driver 12, a signal module 13, and a fault excitation module 14.

[0018] Electrical interface 11 uses a DIN96 connector and is installed at the other end of the injection board body 1. See [link / reference]. Figure 2 Specifically, the electrical interface in this embodiment includes a power supply interface, a communication interface, a signal interface, and a fault excitation interface.

[0019] The power supply interface is connected to an external 24VDC power supply.

[0020] Electrical interface 11 is connected to relay driver 12; relay driver 12 is connected to signal module 13 and fault excitation module 14, and realizes signal output and fault excitation injection according to control commands.

[0021] Specifically, signal module 13 includes 32 signal channels; fault excitation module 14 includes 3 fault excitation channels; each of the 32 signal channels is equipped with 3 relays, and each of the 3 fault excitation channels is equipped with 1 relay; relay driver 12 is electrically connected to the control terminals of the 96 relays in the signal channels and the 3 relays in the fault excitation channels.

[0022] The aforementioned 32 signal channels and 3 fault excitation channels are existing technologies, and the channels are fixed. Therefore, their specific arrangement structure will not be described in detail in this embodiment. During use, they can be implemented as needed. For example, if 20 signal channels and 1 fault excitation channel are actually required, only the corresponding relays need to be installed and soldered.

[0023] See Figure 6 The working principle of the fault injection card is as follows: The relay in the fault injection card is controlled by RS485 to realize the connection / disconnection of dutn (n is 0-31) with chn (n is 0-31), aX (X is 0-2), bX (X is 0-2), busA, and busB, thereby realizing short-circuit fault injection and open-circuit fault injection. At the same time, aX and bX can be connected to different fault excitations as needed.

[0024] The signal interface connects to the device under test and the test equipment; the fault excitation interface connects to the external fault excitation source; the communication interface adopts the RS485 communication interface; the communication interface connects to the external RS485 control bus to receive control commands input from the external RS485 control bus.

[0025] The injection board body 1 is assembled with the mounting baffle 2 and installed in the card slot of the signal conditioning box through the mounting baffle 2.

[0026] See Figure 1 and Figure 4 Specifically, two first through holes 15 are provided at one edge of the injection board body 1, and the two through holes 15 are respectively provided on both sides of the injection board body 1 along the width direction. Two L-shaped mounting plates 25 are provided on one end of the mounting baffle 2, and each of the two mounting plates 25 has a second screw hole 23 at one end. The two mounting plates 25 are assembled with the mounting baffle 2 using screws through the two second through holes 22 and the two second screw holes 23. Each of the two mounting plates 25 has two first screw holes 21 at one end, and the two first screw holes 21 correspond to the two first through holes 15. The injection board body 1 is assembled with the mounting baffle 2 using screws. Each end of the mounting baffle 2 along its length direction has two third through holes 24, and the mounting baffle 2 is installed in the signal conditioning box using screws through the two third through holes 24.

[0027] Mounting baffle 2 has mounting holes 23 at both ends along its length. Mounting baffle 2 is installed in the slot of signal conditioning box through mounting holes 23 and external mounting parts.

[0028] Based on the same inventive concept, see [link to inventive concept] Figure 5 This embodiment provides a signal conditioning box, including a conditioning box body and multiple crossbeams 3. In this embodiment, two crossbeams 3 are used as an example. The two crossbeams 3 are arranged parallel to each other in the conditioning box body, and multiple slots 4 are arranged vertically between adjacent crossbeams 3. The slots are designed according to actual needs. In this embodiment, the specific number of slots is not given as an example or limited. The multiple slots 4 are evenly arranged along the length of the crossbeams 3. The aforementioned fault injection board based on the serial bus RS485 is respectively installed in the multiple slots 4, and the injection board body 1 is connected to the conditioning box body through a mounting baffle 2.

[0029] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A fault injection board based on RS485 serial bus, comprising an injection board body (1); the injection board body (1) is provided with an electrical interface (11), a relay driver (12), a signal module (13) and a fault excitation module (14); the electrical interface (11) includes a power supply interface, a communication interface, a signal interface and a fault excitation interface; The electrical interface (11) is connected to the relay driver (12); the relay driver (12) is connected to the signal module (13) and the fault excitation module (14) respectively, and is used to output signals and inject fault excitation according to the control commands input by the communication interface; The power supply interface is used to connect to an external power supply. The signal interface is used to connect to the device under test and the test equipment; The fault excitation interface is used to connect to an external fault excitation source; Its features are: Includes a mounting baffle (2) disposed at one end of the injection board body (1); the injection board body (1) is installed in the signal conditioning box via the mounting baffle (2); The injection board body (1) is made of a standard 3U printed circuit board; The electrical interface (11) uses a DIN96 connector and is installed at the other end of the injection board body (1); The communication interface adopts an RS485 communication interface; the communication interface is connected to an external RS485 control bus and is used to receive control commands input from the external RS485 control bus.

2. The fault injection board based on RS485 serial bus according to claim 1, characterized in that: The signal module (13) includes 32 signal channels; the fault excitation module (14) includes 3 fault excitation channels; Each of the aforementioned signal channels is equipped with 3 relays, and each of the aforementioned fault excitation channels is equipped with 1 relay; The relay driver (12) is connected to the control terminals of 96 relays in the signal channel and 3 relays in the fault excitation channel, respectively.

3. The fault injection board based on RS485 serial bus according to claim 1 or 2, characterized in that: The injection board body (1) has a plurality of first through holes (15) on one side edge, and the mounting baffle (2) has a plurality of first screw holes (21); the plurality of first screw holes (21) correspond to the plurality of first through holes (15); the injection board body (1) is assembled with the mounting baffle (2) by screws.

4. The fault injection board based on RS485 serial bus according to claim 3, characterized in that: There are two of each of the first through hole (15) and the first screw hole (21); The two first through holes (15) are respectively provided on both sides of the end face of the injection board body (1) along the width direction; The mounting baffle (2) has two second through holes (22) at both ends along its length; the mounting baffle (2) has two L-shaped mounting plates (25) on its inner side, and one end of each mounting plate (25) has a second screw hole (23). The two mounting plates (25) are assembled with the mounting baffle (2) using screws through two second through holes (22) and two second screw holes (23); The two first screw holes (21) are respectively located at the other end of the two mounting plates (25); The mounting baffle (2) has two third through holes (24) at both ends along its length direction. The mounting baffle (2) is installed in the signal conditioning box using screws through the two third through holes (24).

5. A signal conditioning box, characterized in that: Includes the main body of the cooking box and multiple crossbeams (3); Multiple crossbeams (3) are arranged parallel to each other in the body of the conditioning box, and multiple slots (4) are arranged vertically between two adjacent crossbeams (3). The multiple slots (4) are evenly arranged along the length of the crossbeams (3). Each of the multiple card slots (4) is provided with a fault injection board based on the RS485 serial bus as described in any one of claims 1-4, and the injection board body (1) is connected to the conditioning box body through a mounting baffle (2).

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