CN110174531B - Reconfigurable interface circuit for signal path of airplane/suspended object test system - Google Patents
Reconfigurable interface circuit for signal path of airplane/suspended object test system Download PDFInfo
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- CN110174531B CN110174531B CN201910438614.0A CN201910438614A CN110174531B CN 110174531 B CN110174531 B CN 110174531B CN 201910438614 A CN201910438614 A CN 201910438614A CN 110174531 B CN110174531 B CN 110174531B
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- 238000012360 testing method Methods 0.000 title claims abstract description 68
- 230000005284 excitation Effects 0.000 claims description 6
- 238000012790 confirmation Methods 0.000 claims description 4
- 238000012795 verification Methods 0.000 claims description 4
- 239000000725 suspension Substances 0.000 abstract description 6
- 230000008054 signal transmission Effects 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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Abstract
The invention belongs to the technical field of system synthesis and test, and relates to a reconfigurable interface circuit of a signal path of an airplane/suspension test system. The circuit comprises a protection circuit, a signal path switching circuit and a configuration confirming circuit; the existence of the protection circuit and the configuration circuit ensures that the instrument cannot cause the damage of the measured object due to the inconsistent state of the switching circuit; the microprocessor is utilized in the process of executing the configuration switching, the response is rapid, and the execution stability of the configuration switching is good. The invention provides a testing interface circuit with high safety and good stability and a reconfigurable signal path, which ensures that a tester can rapidly configure the signal transmission path by using software of a microprocessor under the conditions of not damaging a tested object, not replacing special testing equipment and not replacing an adapter, can adapt to different testing tasks, reduces reconfiguration time and lowers reconfiguration cost.
Description
Technical Field
The invention belongs to the technical field of system synthesis and test, and relates to a reconfigurable interface circuit of a signal path of an airplane/suspension test system.
Background
At present, when a special test device of an aircraft/suspension electrical connection system executes a test task on a signal transmission state between an aircraft and a suspension, a signal path in an interface circuit at a test resource end cannot be changed, and the special test device or adapters with different configuration configurations need to be changed in the face of different test tasks, so that the problems of high test reconstruction cost and long reconstruction time are caused.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the problems of long test reconstruction time and high reconstruction cost caused by the fact that the existing test instrument cannot be flexibly adjusted in signal configuration, the invention provides the test interface circuit with the reconfigurable signal path, which has high safety and good stability, and ensures that a tester can rapidly configure the signal transmission path by using software of a microprocessor under the conditions of not damaging a tested object, not replacing special test equipment and not replacing an adapter, thereby being suitable for different test tasks, reducing reconstruction time and reducing reconstruction cost.
The technical scheme of the invention is as follows: the reconfigurable interface circuit of the signal path of the airplane/suspended object test system is characterized by comprising a protection circuit, a signal path switching circuit and a configuration confirming circuit; the signal path switching circuit consists of a plurality of double-pole double-throw relays Kn, and each double-pole double-throw switch is respectively connected with an excitation resource and a response resource; the configuration confirming circuit main body is a microprocessor, the microprocessor is loaded with a renewable signal path configuration table and is provided with a plurality of logic input interfaces and a logic output interface, the logic input interfaces are connected with the signal path switching circuit, and the logic output interface is connected with the protection circuit; the protection circuit consists of a plurality of high-reliability relays SWn and is connected with a logic output interface of the configuration confirmation circuit.
Each double-pole double-throw switch in the signal path switching circuit executes signal path switching according to a signal path configuration table to form excitation and response signal path combination.
The signal path switching circuit checks the switched signal configuration and the signal configuration expected to be realized through the signal configuration confirming circuit after completing a series of switching of the signal path.
The double-pole double-throw switch adopts a high-reliability switch device.
After the configuration confirming circuit receives the signal combination transmitted by the signal path switching circuit, the microprocessor verifies the received actual signal combination and the signal path configuration table, and outputs a corresponding control signal to the protection circuit according to a verification result.
The protection circuit is in an open state by default, and is closed when the control signal is true, namely the configuration confirms that the circuit verification is successful, so that the tested object is connected with the test resource.
Before the instrument state of the airplane/suspension object to be tested meets the test requirement, the interface of the object to be tested and the test resource interface of the test instrument are controlled by the protection circuit, so that the object to be tested and the test resource interface of the test instrument are in a disconnected state.
When the test resource system utilizes the microprocessor, the configuration switching is rapidly carried out on all the signal paths through software, and then the actual switching result is verified with the signal path configuration table of the new test task.
When the actual switching result is in accordance with the configuration table of the test task, the microprocessor closes the protection circuit, and finally the tested object is safely connected with the test resource.
The invention has the beneficial effects that: the existence of the protection circuit and the configuration circuit ensures that the instrument cannot cause the damage of the measured object due to the inconsistent state of the switching circuit; the microprocessor is utilized in the process of executing the configuration switching, the response is rapid, and the execution stability of the configuration switching is good.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1, the reconfigurable interface circuit of the signal path of the airplane/suspended object test system comprises a protection circuit, a signal path switching circuit and a configuration confirming circuit; the signal path switching circuit consists of a plurality of double-pole double-throw relays Kn, and each double-pole double-throw switch is respectively connected with an excitation resource and a response resource; the configuration confirming circuit main body is a microprocessor, the microprocessor is loaded with a renewable signal path configuration table and is provided with a plurality of logic input interfaces and a logic output interface, the logic input interfaces are connected with the signal path switching circuit, and the logic output interface is connected with the protection circuit; the configuration confirmation circuit is the core of the whole circuit; the protection circuit consists of a plurality of high-reliability relays SWn and is connected with a logic output interface of the configuration confirmation circuit.
The main functions of the circuit are as follows: after a series of switching of the signal paths is completed, the switched signal configuration and the expected signal configuration are checked through the signal configuration confirming circuit, and the high-reliability switch device is selected to ensure that the test state of the test instrument meets the test safety requirement, so that the protection circuit is closed, and the tested object is safely connected with the test resources under the condition of not being accidentally damaged. The use scenario is as follows: when receiving a test task, before the instrument state of the tested object of the airplane/suspension meets the test requirement, the interface of the tested object and the test resource interface of the test instrument are controlled by the protection circuit, so that the tested object and the test resource interface are in a disconnected state. When the test resource system utilizes the micro embedded chip, the configuration switching is rapidly carried out on all signal paths through software, the actual switching result is verified with a signal path configuration table of a new test task, only when the actual switching result is consistent with the test task configuration table, the micro processor can carry out closing action on the protection circuit, and finally the tested object is safely connected with the test resource. The circuit can safely, quickly and inexpensively execute the reconstruction work of the signal path under the condition of not replacing special test equipment or an adapter.
The test interface circuit consists of three parts, namely a protection circuit, a signal path switching circuit and a configuration circuit. Each signal channel Wn in the interface of the test object is connected to a protection control switch SWn (n =1,2, 3.. eta.). And the SWn is connected with a double-pole double-throw switch, and two ports of the first group of double-throw switches Kn are defined as Kn-1 and Kn-2 respectively, wherein Kn-1 corresponds to an excitation signal channel of the test resource, and Kn-2 corresponds to a response signal channel of the test resource. Two ports of the second set of double throw switches Kn' are defined as Kn-3 and Kn-4 respectively, Kn-3 corresponds to a 5V high level signal, and Kn-4 corresponds to a ground signal. Kn' is connected to a port PAn of an embedded processor of a certain model. In this way, Kn' corresponding to each signal channel Wn is connected to PAn to form logic input ends PA 1-PAn of the configuration circuit. When the microprocessor receives a corresponding ground signal or a high-level signal, the excitation and response sequences of a signal path configuration table of a certain test task are compared, and if the comparison is successful (namely the expected configuration table is consistent with the actual path configuration), the protection circuit can execute a closing action to realize the safe connection between the tested object and the reconstructed test resource.
Claims (8)
1. The reconfigurable interface circuit of the signal path of the airplane/suspended object test system is characterized by comprising a protection circuit, a signal path switching circuit and a configuration confirming circuit; the signal path switching circuit consists of a plurality of double-pole double-throw relays Kn, and each double-pole double-throw switch is respectively connected with an excitation resource and a response resource; the configuration confirming circuit main body is a microprocessor, the microprocessor is loaded with a renewable signal path configuration table and is provided with a plurality of logic input interfaces and a logic output interface, the logic input interfaces are connected with the signal path switching circuit, and the logic output interface is connected with the protection circuit; the protection circuit consists of a plurality of high-reliability relays SWn and is connected with a logic output interface of the configuration confirming circuit; after the configuration confirming circuit receives the signal combination transmitted by the signal path switching circuit, the microprocessor verifies the received actual signal combination and the signal path configuration table, and outputs a corresponding control signal to the protection circuit according to a verification result.
2. The aircraft/hangar test system signal path reconfigurable interface circuit of claim 1, wherein each double pole double throw switch in the signal path switching circuit performs signal path switching according to a signal path configuration profile to form stimulus, responsive signal path combinations.
3. The aircraft/hangar test system signal path reconfigurable interface circuit as claimed in claim 1, wherein the signal path switching circuit checks the switched signal configuration against a desired signal configuration via the signal configuration confirmation circuit after completing switching of the signal path.
4. An aircraft/hangar test system signal path reconfigurable interface circuit as claimed in claim 1, wherein said double pole double throw switch employs high reliability switching devices.
5. The aircraft/hangar test system signal path reconfigurable interface circuit as claimed in claim 1, wherein said protection circuit defaults to an open state and closes when the control signal is true, i.e., the configuration confirms that the circuit verification has been successful, to connect the tested object to the test resource.
6. The reconfigurable interface circuit for signal paths of an aircraft/hangar test system as claimed in claim 1, wherein before the instrument state of the aircraft/hangar to be tested meets the test requirements, the interface of the to-be-tested object and the test resource interface of the test instrument are controlled by the protection circuit to be in a disconnected state.
7. An aircraft/hangar test system signal path reconfigurable interface circuit as defined in claim 1, wherein, when the test system utilizes the microprocessor, the actual switching results are verified against the signal path configuration table for the new test task by rapidly switching the configuration of all signal paths.
8. An aircraft/hangar test system signal path reconfigurable interface circuit as defined in claim 7, wherein when the actual switching result matches the test task configuration table, the microprocessor closes the protection circuit, and finally the tested object is safely connected to the test resources.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910438614.0A CN110174531B (en) | 2019-05-24 | 2019-05-24 | Reconfigurable interface circuit for signal path of airplane/suspended object test system |
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| CN201910438614.0A CN110174531B (en) | 2019-05-24 | 2019-05-24 | Reconfigurable interface circuit for signal path of airplane/suspended object test system |
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| CN110174531B true CN110174531B (en) | 2021-08-03 |
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| CN202267741U (en) * | 2011-10-14 | 2012-06-06 | 北京博电新力电气股份有限公司 | Automatic calibration device of relay protection tester |
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| CN106199485A (en) * | 2016-06-22 | 2016-12-07 | 国网宁夏电力公司电力科学研究院 | High-voltage electric energy meter remote online check system |
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| US4894818A (en) * | 1987-10-22 | 1990-01-16 | Kokusai Denshin Denwa Kabushiki Kaisha | Optical packet switching system using multi-stage combination of light triggering switches |
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| CN110174531A (en) | 2019-08-27 |
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