An intelligent test interface unit based on a relay circuit

Abstract

The application relates to a relay circuit-based intelligent test interface unit, which comprises a core control layer, an interface adaptation layer and a measured equipment layer connected in sequence, the measured equipment layer comprises multiple measured equipment, the core control layer comprises a control host computer and an IO card, a program-controlled power supply, a CAN card, an oscilloscope and a multimeter connected to the control host computer, and the interface adaptation unit comprises a power supply communication isolation component, a level stage adjustment component, a load adjustment component, a multimeter switching component and a power supply switching component. Compared with the prior art, the application has the advantages of reducing the use of resources, improving compatibility, shortening the test time, making the external condition switching more convenient, being expandable and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of transmitter test tooling, in particular to an intelligent test interface unit based on a relay circuit. BACKGROUND

[0002] At present, in the existing track circuit transmitter test tooling, the transmitter test tooling is divided into relay encoding transmitter test tooling and communication encoding transmitter test tooling, and one test tooling can only be used for a specific type of measured equipment. When testing multiple measured equipment, multiple test toolings need to be prepared and the test personnel need to be frequently replaced. The test tooling is various in type, poor in compatibility and complex in operation. At the same time, the existing track circuit transmitter test tooling is fixed in condition and cannot be adjusted according to user demand. Each test can only test one device, which is low in efficiency. SUMMARY

[0003] The purpose of the present application is to overcome the defects of the prior art that each test can only test one device and is low in efficiency, and to provide an intelligent test interface unit based on a relay circuit.

[0004] The purpose of the present application can be achieved by the following technical solutions:

[0005] An intelligent test interface unit based on a relay circuit, comprising a core control layer, an interface adaptation layer and a measured equipment layer connected in sequence, wherein the measured equipment layer comprises a plurality of measured equipment, the core control layer comprises a control host and an IO card, a program-controlled power supply and a CAN card connected to the control host, and the interface adaptation unit comprises a power supply communication isolation component, the power supply communication isolation component comprises a first relay and a second relay, the first relay and the second relay are connected to the IO card, the input end of the first relay is used to connect a test port, the output end of the first relay is respectively connected to the input end of the second relay and the CAN card through switching, and the output end of the second relay is respectively connected to a test loop and the program-controlled power supply through switching.

[0006] Further, the input end of the first relay is used to switch connection between a relay encoding transmitter base and a communication encoding transmitter base.

[0007] Further, the number of the power supply communication isolation components is multiple.

[0008] Further, the interface adaptation layer further comprises a plurality of level adjustment components, and the level adjustment component comprises a third relay connected to the IO card, and the input end of the third relay is used to connect a test port, and the output end of the third relay is respectively connected to a test port and a test loop through switching.

[0009] Further, the input end and the output end of the third relay are connected with the test port, which is a transmitter FSK signal port.

[0010] Further, the core control layer further comprises an oscilloscope, and the interface adaptation layer further comprises a load adjustment component, the load adjustment component comprising a fourth relay and a fifth relay, the fourth relay and the fifth relay being connected to the IO card, the input end of the fourth relay being connected to the oscilloscope, and the output end of the fourth relay being used for switching connection of two test ports, the input end of the fifth relay being connected to a first load, and the output end of the fifth relay being connected to the output end of the fourth relay.

[0011] Further, the first load has a resistance value in a range of 300-500 ohms.

[0012] Further, the core control layer further comprises a multimeter, and the interface adaptation layer further comprises a multimeter switching component, the multimeter switching component comprising a plurality of sixth relays, each of the sixth relays being connected to the IO card, the input end of each of the sixth relays being connected to the multimeter, and the output end of each of the sixth relays being used for connection of two test ports, and the two output ends of the sixth relays being further connected to a second load.

[0013] Further, the two test ports connected to the output end of the sixth relay are respectively an FBJ signal terminal of a transmitter and a power module, and the second load has a resistance value in a range of 1500-1900 ohms.

[0014] Further, the interface adaptation layer further comprises a power supply switching component, the power supply switching component comprising a plurality of seventh relays, each of the seventh relays being connected to the IO card, and each of the seventh relays being connected to a program-controlled power supply at one end and being used for switching connection of a test port and a test loop at the other end.

[0015] Compared with the prior art, the application has the following advantages:

[0016] (1) The use of resources is reduced, and the compatibility is improved, and the communication coding transmitter test and the relay coding transmitter test are compatible, and when the transmitter test of different coding types is performed, a plurality of transmitter test tools do not need to be prepared, an interface adaptation unit realizes that one oscilloscope board card covers all test points and one 24V condition terminal covers all base configuration condition terminals, and one interface adaptation unit solves the external condition requirement of test of ten measured devices.

[0017] (2) Current similar test system does not have the ability of multiple parallel test, the interface cannot meet the basic requirements of intelligent test, the interface extensibility is poor, and it belongs to island system. The scheme makes up the defect of track circuit test system information island, can adapt to various application scenarios, and the interface adaptation unit has high commercial value as an innovative achievement.

[0018] (3) The test time is fast, ten devices can be supported for parallel test each time, and time cost is saved.

[0019] (4) The external condition switching is more convenient, and the switching of the internal relay of the program control interface adaptation unit can realize the configuration change of the external environment.

[0020] (5) It is expandable, function modules can be added or reduced according to actual requirements, when facing special test requirements, only the internal relay of the interface adaptation unit needs to be adjusted, and perfect fitting with actual test requirements can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A structure block diagram of an intelligent test interface unit based on a relay circuit is provided in the embodiment of the present application;

[0022] Figure 2 A structure schematic diagram of a level adjustment assembly in an interface adaptation layer is provided in the embodiment of the present application;

[0023] Figure 3 A structure schematic diagram of a power supply communication isolation assembly in an interface adaptation layer is provided in the embodiment of the present application;

[0024] Figure 4 A structure schematic diagram of a load adjustment assembly in an interface adaptation layer is provided in the embodiment of the present application;

[0025] Figure 5 A structure schematic diagram of a multimeter switching assembly in an interface adaptation layer is provided in the embodiment of the present application;

[0026] Figure 6 A structure schematic diagram of a power supply switching assembly in an interface adaptation layer is provided in the embodiment of the present application;

[0027] In the figure, test is a test port, Relay is a relay, 1, core control layer, 101, control host, 102, IO card, 103, program-controlled power supply, 104, CAN card, 105, oscilloscope, 106, multimeter, 2, interface adaptation layer, 201, first relay, 202, second relay, 203, third relay, 204, fourth relay, 205, fifth relay, 206, sixth relay, 207, seventh relay, 3, device under test layer, 301, device under test. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0030] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] It should be noted that the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0033] Furthermore, the terms "horizontal," "vertical," and the like are used as terms of convenience to provide reference frames for certain components. They do not imply absolute horizontal or vertical orientations. For example, "horizontal" merely means more horizontal than "vertical," and does not require that the structure be perfectly horizontal, but can be slightly tilted.

[0034] Embodiment 1

[0035] The embodiment provides a smart test interface unit based on a relay circuit, which comprises a core control layer 1, an interface adaptation layer 2 and a device under test layer 3 connected in sequence, the device under test layer 3 comprises a plurality of devices under test 301, the core control layer 1 comprises a control host 101 and an IO card 102, a program-controlled power supply 103 and a CAN card 104 connected to the control host 101, and the interface adaptation unit comprises a power supply communication isolation assembly, the power supply communication isolation assembly comprises a first relay 201 and a second relay 202, the first relay 201 and the second relay 202 are connected to the IO card 102, the input end of the first relay 201 is used for connecting a test port, the output end of the first relay 201 is respectively connected to the input end of the second relay 202 and the CAN card 104 in switching mode, and the output end of the second relay 202 is respectively connected to a test loop and the program-controlled power supply 103 in switching mode.

[0036] The input end of the first relay 201 is used for switching connection of a relay encoding transmitter base and a communication encoding transmitter base. The number of the power supply communication isolation assemblies is multiple.

[0037] The switching control of the first relay 201 and the second relay 202 can solve the conflict problem of the relay encoding transmitter base and the communication encoding transmitter base.

[0038] As a preferred embodiment, in order to realize the level adjustment of the FSK signal of the transmitter, the interface adaptation layer 2 further comprises a plurality of level adjustment assemblies, the level adjustment assembly comprises a third relay 203, the third relay 203 is connected to the IO card 102, and the input end of the third relay 203 is used for connecting a test port and the output end is respectively connected to a test port and a test loop in switching mode.

[0039] The test port connected to the input end and the output end of the third relay 203 is a transmitter FSK signal port.

[0040] As a preferred embodiment, in order to realize the output of the FSK signal of the transmitter, the core control layer 1 further comprises an oscilloscope 105, and the interface adaptation layer 2 further comprises a load adjustment component, the load adjustment component comprising a fourth relay 204 and a fifth relay 205, both of which are connected to the IO card 102, the input end of the fourth relay 204 being connected to the oscilloscope 105, and the output end being used for switching connection of two test ports, respectively, and the input end of the fifth relay 205 being connected to a first load, and the output end being connected to the output end of the fourth relay 204.

[0041] The resistance of the first load is within the range of 300-500 ohms, and in the embodiment, is 400 ohms.

[0042] As a preferred embodiment, in order to realize that one multimeter covers multiple test points, the core control layer 1 further comprises a multimeter 106, and the interface adaptation layer 2 further comprises a multimeter switching component, the multimeter switching component comprising a plurality of sixth relays 206, each of which is connected to the IO card 102, the input end of each of the sixth relays 206 being connected to the multimeter 106, and the output end being used for connecting two test ports, respectively, and the two output ends of the sixth relays 206 being further commonly connected to a second load.

[0043] The two test ports connected by the output end of the sixth relay 206 are the FBJ signal terminal of the transmitter and the power module, respectively, and the resistance of the second load is within the range of 1500-1900 ohms, and in the embodiment, the resistance of the second load is 1700 ohms.

[0044] As a preferred embodiment, in order to realize that one 24V condition terminal covers all base configuration condition terminals, the interface adaptation layer 2 further comprises a power supply switching component, the power supply switching component comprising a plurality of seventh relays 207, each of which is connected to the IO card 102, each of the seventh relays 207 being connected to the program-controlled power supply 103 at one end, and being used for switching connection of a test port and a test loop at the other end, the test port being a base configuration condition terminal of the transmitter, and the program-controlled power supply 103 being a 24V power supply.

[0045] Any combination of the above preferred embodiments can obtain a more optimal embodiment, and the working principle of one optimal embodiment obtained by combining all the preferred embodiments will be described in detail below.

[0046] The intelligent interface unit is responsible for providing an adapter interface between the core control layer and the device under test, providing the 24V power supply required for testing, and providing the external conditions required for testing to the device under test layer. Unlike existing test systems, the addition of an intelligent interface adapter unit can greatly improve the testing capability of the test system, from the original single-machine test to batch testing, greatly improving efficiency. At the same time, the flexible interface allows the test system to be flexibly applied to intelligent scenarios.

[0047] Working principle:

[0048] When the main power supply is turned on, according to the test requirements, the core control layer intelligently switches the internal circuit of the intelligent test interface unit through the program. The intelligent test interface unit adjusts the supply of 24 DC conditions, changes the relay coding conditions and communication coding conditions of the device under test, matches the terminal resistance required for communication, and changes the external load.

[0049] When testing a relay-encoded transmitter, the interface adapter unit automatically switches from communication encoding to relay encoding. When testing a communication-encoded transmitter, the interface adapter unit automatically switches from relay encoding to communication encoding. Setting up the interface adapter unit involves supplying a 24V DC power supply, configuring the transmitter base, communicating with the CAN bus, collecting transmitter FSK signals, isolating signals between devices, and collecting current and voltage.

[0050] When the transmitter FSK signal level needs to be changed, adjust the relays between test 1-7 and test 1-1 to test 1-6, and between test 1-14 and test 1-8 to test 1-13 to adjust the level, such as Figure 3 shown.

[0051] When testing the relay encoder transmitter, disconnect the four relays Relay13, Relay15, Relay17, and Relay19, and attract the four relays Relay14, Relay16, Relay18, and Relay20 to ensure that F1\F2\F3\F4 can obtain 24V conditions; attract the four relays Relay13, Relay15, Relay17, and Relay19, and disconnect the four relays Relay14, Relay16, Relay18, and Relay20 to ensure that the CAN channel between the device under test layer and the core control layer is unobstructed, while ensuring the isolation of the 24V conditional power and the control CAN communication relay to ensure safety; to solve the conflict problem between the relay encoder transmitter base F1\F2\F3\F4 and the communication encoder transmitter base CANDH\CANDL\CANEH\CANEL, such as Figure 4 shown.

[0052] The transmitter FSK signal output is divided into two cases of empty load and 400 ohm band load, in the empty load case, the Relay 42 is attracted, in the 400 ohm band load case, the Relay 42 is disconnected, so as to realize the transmitter FSK signal empty load output and the transmitter FSK signal 400 ohm band load output, as shown in Figure 5 . .

[0053] The FBJ signal terminals and the power module of ten transmitters are connected in parallel with the oscilloscope through the relay, and the attraction of the relay is controlled to determine which terminal is measured by the multimeter, so as to realize that one multimeter covers all test points, as shown in Figure 6 .

[0054] The base configuration condition terminals of ten transmitters are connected in parallel with the 24V condition terminal through the relay, and the attraction of the relay is controlled to determine which base configuration condition terminal is directly connected to the 24V condition terminal, so as to realize that one 24V condition terminal covers all base configuration condition terminals.

[0055] The preferred embodiments of the present application are described in detail above. It should be understood that those skilled in the art can make many modifications and changes without creative labor based on the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment based on the prior art according to the concept of the present application shall be within the protection scope determined by the claims.

Claims

1. A relay-based intelligent test interface unit, characterized by, It comprises a core control layer (1), an interface adaptation layer (2) and a device under test layer (3) connected in sequence, the device under test layer (3) comprises a plurality of devices under test (301), the core control layer (1) comprises a control host (101) and an IO card (102), a program-controlled power supply (103) and a CAN card (104) connected to the control host (101), the interface adaptation unit comprises a power supply communication isolation assembly, the power supply communication isolation assembly comprises a first relay (201) and a second relay (202), the first relay (201) and the second relay (202) are connected to the IO card (102), the input end of the first relay (201) is used for connecting the test port, the output end of the first relay (201) is respectively connected to the input end of the second relay (202) and the CAN card (104), the output end of the second relay (202) is respectively connected to the test loop and the program-controlled power supply (103); The input end of the first relay (201) is used for switching connection between the relay encoding transmitter base and the communication encoding transmitter base; The interface adaptation layer (2) further comprises a plurality of level adjustment assemblies, the level adjustment assembly comprises a third relay (203), the third relay (203) is connected to the IO card (102), the input end of the third relay (203) is used for connecting the test port, and the output end is respectively connected to the test port and the test loop.

2. The intelligent test interface unit based on a relay circuit according to claim 1, characterized in that, The number of the power supply communication isolation assemblies is multiple.

3. The intelligent test interface unit based on a relay circuit according to claim 1, characterized in that, The test port connected to the input end and the output end of the third relay (203) is the transmitter FSK signal port.

4. The intelligent test interface unit based on relay circuit according to claim 1, characterized in that: The core control layer (1) further comprises an oscilloscope (105), and the interface adaptation layer (2) further comprises a load adjustment assembly, the load adjustment assembly comprises a fourth relay (204) and a fifth relay (205), the fourth relay (204) and the fifth relay (205) are connected to the IO card (102), the input end of the fourth relay (204) is connected to the oscilloscope (105), and the output end is respectively used for switching connection between two test ports, the input end of the fifth relay (205) is connected with a first load, and the output end is connected to the output end of the fourth relay (204).

5. The intelligent test interface unit based on a relay circuit according to claim 4, characterized in that The resistance value of the first load is within the range of 300-500 ohms.

6. The intelligent test interface unit based on a relay circuit according to claim 1, characterized in that, The core control layer (1) further comprises a multimeter (106), and the interface adaptation layer (2) further comprises a multimeter switching assembly, the multimeter switching assembly comprises a plurality of sixth relays (206), each sixth relay (206) is connected to the IO card (102), the input end of each sixth relay (206) is connected to the multimeter (106), and the output end is respectively used for connecting two test ports, and the two output ends of the sixth relay (206) are also commonly connected with a second load.

7. The intelligent test interface unit based on a relay circuit according to claim 6, characterized in that The two test ports connected to the output end of the sixth relay (206) are respectively the FBJ signal terminal of the transmitter and the power module, and the resistance value of the second load is within the range of 1500-1900 ohms.

8. The intelligent test interface unit based on a relay circuit according to claim 1, characterized in that, The interface adaptation layer (2) further comprises a power supply switching component, which comprises a plurality of seventh relays (207), each of which is connected to the IO card (102), and each of the seventh relays (207) has one end connected to the program-controlled power supply (103) and the other end used for switching connection of the test port and the test loop.

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