ASA-based special test fixture for communication equipment plate fault detection instrument

Abstract

The utility model discloses an ASA-based special test fixture for a communication equipment plate fault detection instrument. The ASA-based special test fixture comprises a circuit board and a protective shell, the protective shell comprises a detachable cover plate, a bottom plate and side plates, and the bottom plate and the side plates define an accommodating space for accommodating the circuit board; the side plate on at least one side is provided with a hole for inserting a test flat cable and a hole for a control line, and the holes are used for connecting and fixing the test flat cable and the control line; the circuit board comprises a test flat cable interface, a control interface, a plurality of microcontrollers, a plurality of analog chip switches and a plurality of sockets, the control interface is respectively connected with the plurality of microcontrollers, each microcontroller is connected with one or more analog chip switches, the test flat cable interface is connected with each analog chip switch, and the sockets are connected with the test flat cable interface. Each socket is connected with all analog chip switches; the control interface and the test flat cable interface are used for externally connecting control equipment, and the socket is used for externally connecting tested equipment. According to the utility model, the fault plate of the communication equipment can be detected conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of test fixtures, and more specifically to a special test fixture for a communication equipment board fault detection instrument based on ASA. Background Art

[0002] In the current field of ASA-based communication equipment board fault diagnosis equipment, probes or test cables are usually used to detect communication equipment fault boards, such as the domestic Huineng ASA fault detection equipment, the foreign ABI-2400 circuit board fault detector, and the FADOS9F1 fault detector. This type of equipment usually only provides test resources for a specified number of channels using probes or test cables, but the number of channels that need to be tested on communication equipment boards often varies greatly, ranging from dozens to hundreds of pins. This requires that during the detection process, the test channels must be switched manually to ensure that all board pins are tested. However, this method faces the following problems: First, if the probe test method is used, when the number of test board pins is large, it takes a lot of time, and the probe test is mainly operated manually, which is easy to cause test deviation when the probe contact is poor; second, if the test cable test method is used, the number of manual switching of test channels can be appropriately reduced, shortening the test time, but this method requires the test pins of the board to be consistent with the test cable interface in terms of physical properties (pin spacing, arrangement, etc.). In the actual fault detection process, there are few cases where the test cable matches the pins of the board under test, which restricts the application scenarios of the test cable. Utility Model Content

[0003] In view of at least one defect or improvement demand of the prior art, the utility model provides a special test fixture for a communication equipment board fault detection instrument based on ASA, which is convenient for detecting faulty boards of communication equipment.

[0004] In order to achieve the above purpose, the implementation method of the utility model provides the following technical solutions:

[0005] A special test fixture for a communication equipment board fault detection instrument based on ASA, comprising:

[0006] Circuit boards and protective cases;

[0007] The protective shell includes a detachable cover plate, a bottom plate and a side plate, wherein the bottom plate and the side plate enclose a storage space for accommodating the circuit board; at least one side plate has a hole for plugging in a test cable and a hole for a control cable, for connecting and fixing the test cable and the control cable;

[0008] The circuit board includes a test cable interface, a control interface, several microcontrollers, several analog chip switches and several sockets, wherein:

[0009] The control interface is connected to the several microcontrollers respectively, each microcontroller is connected to one or more analog chip switches, the test cable interface is connected to each analog chip switch, and each socket is connected to all analog chip switches;

[0010] The control interface and the test cable interface are used for externally connecting to a control device, and the socket is used for externally connecting to a device under test.

[0011] As a preferred solution of the utility model, the circuit board also includes a ground control analog chip switch, the ground control analog chip switch is connected to a microcontroller, and the connecting line connected to the test cable interface and each analog chip switch is also connected to the ground control analog chip switch.

[0012] As a preferred solution of the present invention, the microcontroller is an STM32 series microcontroller.

[0013] As a preferred solution of the utility model, the control device is a single chip microcomputer or a computer.

[0014] As a preferred solution of the utility model, different sockets match the test pin specifications of different devices under test.

[0015] As a preferred solution of the present invention, the socket is detachably arranged on the circuit board.

[0016] As a preferred solution of the present utility model, the control interface is an RS232 interface.

[0017] As a preferred solution of the utility model, the circuit board also includes a DCDC module, which is connected to each microprocessor and also connected to the control interface, and is used to supply power to the microprocessor and the control interface.

[0018] In general, the above technical solutions conceived by the utility model can achieve the following beneficial effects compared with the prior art:

[0019] The utility model provides a special test fixture for a communication equipment board fault detection instrument based on ASA, which is convenient for detecting faulty boards of communication equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1A schematic diagram of an application scenario of a special test fixture for a communication equipment panel fault detection instrument based on ASA provided in an embodiment of the utility model;

[0022] Figure 2 A schematic diagram of the appearance of a special test fixture for a communication equipment panel fault detection instrument based on ASA provided in an embodiment of the utility model;

[0023] Figure 3 A schematic diagram of the circuit board connection relationship provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model 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 utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0025] The terms "first", "second", "third", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0026] As the first embodiment of the utility model, a special test fixture for a communication equipment board fault detection instrument based on ASA is provided. Figure 1 As shown, the test fixture provided in this embodiment is applied between the faulty board of the communication equipment to be tested and the detection instrument, wherein the detection instrument includes a host computer hardware platform and a corresponding host computer software part. A test cable and a control line are arranged between the test fixture and the host computer, wherein the control line is for the host computer to communicate with the test fixture, and the test path is switched by the microcontroller inside the test fixture. The test cable connects the host computer to the test fixture, and provides a number of test channels for the test fixture through the test cable interface in the test fixture, thereby realizing the testing of the faulty board of the communication equipment to be tested. For the testing of the faulty board of the communication equipment to be tested, the host computer exchanges information with the test fixture through the test cable, and the test fixture then exchanges information with the faulty board of the communication equipment to be tested to realize the testing function.

[0027] like Figure 2As shown, the test fixture provided in this embodiment includes a circuit board and a protective shell, wherein the test fixture provided in this embodiment realizes the above functions through the circuit board and the components arranged on the circuit board, and the protective shell plays the role of external protection. The protective shell of this embodiment is a rectangular box, including a detachable cover plate, a bottom plate and a side plate. Among them, the bottom plate and the side plate enclose a storage space for accommodating the circuit board, and the circuit board can be placed in the storage space. The cover plate is set as a detachable structure. When the test fixture is not used, the cover plate can be covered to protect the entire circuit board. When the test fixture is used, the upper computer and the fault panel of the communication device to be tested can be connected by removing the cover plate. The detachable cover plate in this embodiment can realize the detachable function in a variety of ways, for example, it can be a side plate with a plurality of screw holes, the cover plate has corresponding screw holes, and is connected by screws; for another example, a slide groove can be set on the side plate, and the cover plate is covered by sliding. Those skilled in the art can also realize detachable connection in other similar ways, which is not limited here.

[0028] At the same time, the protective case in this embodiment also needs to have corresponding holes on the side panel. Specifically, holes for plugging in test cables and holes for plugging in control cables need to be provided on the side panel. The corresponding holes on the side panel can be used to connect the corresponding test cables and control cables, and can also play a role in fixing the test cables and control cables.

[0029] The circuit board in this embodiment is as follows Figure 3 As shown, it includes a test cable interface, a control interface, several microcontrollers, several analog chip switches and several sockets. Figure 3 A specific implementation method of controlling 40 analog switch chips by two microcontrollers is shown in FIG. The microcontroller is connected to the control interface, and the microcontroller is further connected to multiple analog chip switches, and the analog chip switches are used to switch the test channel. The test cable interface is connected to the analog chip switch, so that the test channel described above can be opened. Each analog chip switch is connected to a socket, and the socket is used to connect the device under test, that is, the faulty board of the communication device under test.

[0030] In this embodiment, the circuit board can be a printed circuit board, or it can be other circuit board structures that can be used to install devices and make electrical connections. Furthermore, the control interface in this embodiment is an RS232 interface, and the control line is an RS232 connection line to realize the connection between the host computer and the microcontroller. The test cable interface can use a European connector, or other interfaces that can realize the test cable connection function. In this embodiment, the socket can be selected such as an FFC / FPC connector, a 2.0mm pitch pin header, a 2.54mm pitch pin header, etc., which can be used to plug in the faulty board of the communication equipment to be tested. Figure 3It is shown that the control commands are distributed between microcontrollers inside the circuit board by connecting them via serial ports. Those skilled in the art can also distribute the control commands by connecting all microcontrollers to the control interface.

[0031] Furthermore, the circuit board also includes a ground control analog chip switch, which is connected to a microcontroller, and the connection line between the test line interface and each analog chip switch is also connected to the ground control analog chip switch. The ground control analog chip switch receives the corresponding ground control signal through the microcontroller, which can ensure that the line connected to each control analog switch and the test line interface is correctly grounded.

[0032] The microcontroller in this embodiment is an STM32 series microcontroller, and the control device is a host computer, for example, a personal computer or a single-chip microcomputer dedicated to testing. The socket in this embodiment can be a plurality of fixedly welded sockets, wherein different sockets match the test pin specifications of different devices under test. In another embodiment, the socket can be selected in a detachable manner, for example, by plugging the structure of the pluggable pins with the circuit board, so that the socket corresponding to the pin can be replaced during the testing of different devices under test.

[0033] Furthermore, if Figure 3 As shown, the circuit board also includes a DCDC module, which is connected to each microprocessor and the control interface, and is used to power the microprocessor and the control interface. Generally speaking, this DCDC module can be a DCDC module that provides a 3.3V voltage, providing 3.3V direct current to the microprocessor and the control interface.

[0034] The principle of testing in this embodiment is as follows: the device under test is connected to the analog chip switch through the socket. Since each analog chip switch is connected to each socket, and each analog chip switch is connected to the test cable interface, each socket can form several test channels with the test cable interface through all analog chip switches. For example, socket 1 is connected to the analog switch chips numbered 1 to 40, which can be recorded as the 1 to 40 test channels of socket 1, and the 1 to 40 analog switch chips are all connected to the test cable interface, so that the device under test of socket 1 can be tested through the 1 to 40 test channels. Further, the microprocessor is connected to the host computer through the control interface and the control line, obtains the control signal of the host computer, and can control the on and off of the analog switch chip. For example, in the above case, the host computer can choose to turn off the analog switch chips 1 to 39, so that the device under test of socket 1 will be tested through the test channel formed by the 40th analog switch chip.

[0035] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A special test fixture for a communication equipment board fault detection instrument based on ASA, comprising: Circuit boards and protective cases; The protective shell comprises a detachable cover plate, a bottom plate and side plates, wherein the bottom plate and the side plates enclose a receiving space for receiving the circuit board; At least one side panel has a hole for inserting a test cable and a hole for inserting a control cable, which are used to connect and fix the test cable and the control cable; The circuit board includes a test cable interface, a control interface, several microcontrollers, several analog chip switches and several sockets, wherein: The control interface is connected to the several microcontrollers respectively, each microcontroller is connected to one or more analog chip switches, the test cable interface is connected to each analog chip switch, and each socket is connected to all analog chip switches; The control interface and the test cable interface are used for externally connecting to a control device, and the socket is used for externally connecting to a device under test.

2. The ASA-based communication equipment board fault detection instrument dedicated test fixture as claimed in claim 1, characterized in that: The circuit board also includes a ground control analog chip switch, which is connected to a microcontroller. The connection line between the test cable interface and each analog chip switch is also connected to the ground control analog chip switch.

3. The ASA-based communication equipment board fault detection instrument dedicated test fixture as claimed in claim 1, characterized in that: The microcontroller is a STM32 series microcontroller.

4. The ASA-based communication equipment board fault detection instrument dedicated test fixture as claimed in claim 1, characterized in that: The control device is a single chip microcomputer or a computer.

5. The ASA-based communication equipment board fault detection instrument dedicated test fixture as claimed in claim 1, characterized in that: Different sockets match the test pin specifications of different devices under test.

6. The ASA-based communication equipment board fault detection instrument dedicated test fixture as claimed in claim 5, characterized in that: The socket is detachably arranged on the circuit board.

7. The ASA-based communication equipment board fault detection instrument dedicated test fixture as claimed in claim 1, characterized in that: The control interface is an RS232 interface.

8. The ASA-based communication equipment board fault detection instrument dedicated test fixture as claimed in claim 1, characterized in that: The circuit board also includes a DCDC module connected to each microprocessor and the control interface, and is used to supply power to the microprocessor and the control interface.

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