CN219737745U - Portable off-line test fixture - Google Patents

Abstract

The utility model discloses a portable off-line testing tool, which relates to the field of electric energy meter testing devices and comprises a shell, wherein a main controller, a communication module, a power module and a man-machine interaction module are arranged in the shell, the communication module, the power module and the man-machine interaction module are respectively connected with the main controller, the power module is respectively connected with equipment to be tested and is used for supplying power to the main controller through the equipment to be tested, and the main controller is in communication connection with the equipment to be tested through the communication module. The utility model provides a portable offline testing tool capable of being hot plugged and unplugged, which is provided with an MCU main controller and an interface for directly communicating with equipment to be tested, namely a tested meter, so that networking communication can be performed without connecting a computer, meanwhile, the power supply of the tool is provided by the tested meter, the tool is not required to be provided with a power supply or connected with an external power supply, the volume of the tool is reduced, and the tool is convenient to carry.

Description

Portable off-line test fixture

Technical Field

The utility model relates to the field of electric energy meter testing devices, in particular to a portable off-line testing tool.

Background

When the intelligent ammeter manufacturer tests the reliability of the ammeter in the research and development process, the communication aspect of the ammeter needs to be tested to verify that the communication function of the ammeter is not affected in the reliability test process, and in order to realize the communication function of the ammeter, the ammeter is usually connected in a 485 networking way and then is communicated online by a computer, so that the technical scheme has the defect that the ammeter cannot be in offline communication, other things cannot be done when the computer is used for the reliability test, and equipment resources are wasted.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a portable off-line testing tool, which solves the problem that an off-line communication cannot be carried out when a test meter is subjected to a reliability test.

In order to achieve the above purpose, the utility model is solved by the following technical scheme:

the utility model provides a portable off-line test fixture, includes the shell, be equipped with main control unit in the shell and respectively with communication module, power module and the human-computer interaction module that main control unit is connected, wherein, power module connects respectively main control unit and equipment that awaits measuring, be used for through equipment that awaits measuring does main control unit power supply, main control unit passes through communication module with equipment communication connection that awaits measuring.

As an implementation manner, the power module further includes a low dropout linear stabilizer, where the low dropout linear stabilizer is connected to the device under test and the main controller, respectively, and is configured to convert a voltage provided by the device under test into a rated voltage of the main controller.

As an implementation manner, the communication module comprises a serial communication module, and the serial communication module is connected with the equipment to be tested through a serial interface.

As an implementation mode, the communication module further comprises an RS485 communication module, and the RS485 communication module is connected with the equipment to be tested through an RS485 interface.

As an implementation manner, the shell is further provided with two status indicator lamps, and the status indicator lamps are connected with the output end of the main controller.

As an implementation manner, the status indicator lamps are a green indicator lamp for successful test and a red indicator lamp for failed test respectively.

As an implementation mode, the shell is also provided with a key, and the key is connected with the man-machine interaction module.

As an implementation manner, the main controller is a single-chip microcomputer.

The utility model has the remarkable technical effects due to the adoption of the technical scheme:

the utility model provides a portable offline testing tool capable of being hot plugged and unplugged, which is provided with an MCU main controller and an interface for directly communicating with equipment to be tested, namely a tested meter, so that networking communication can be performed without connecting a computer, meanwhile, the power supply of the tool is provided by the tested meter, the tool is not required to be provided with a power supply or connected with an external power supply, the volume of the tool is reduced, and the tool is convenient to carry.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is an exemplary diagram of an apparatus of the present utility model;

fig. 2 is a schematic diagram of the operation of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

As shown in fig. 1, the portable offline testing tool provided by the utility model comprises a housing, wherein a main controller, a communication module, a power module and a man-machine interaction module are arranged in the housing, the communication module, the power module and the man-machine interaction module are respectively connected with the main controller, the power module is respectively connected with the main controller and equipment to be tested and is used for supplying power to the main controller through the equipment to be tested, and the main controller is in communication connection with the equipment to be tested through the communication module.

In the utility model, the portable off-line test fixture is provided with a shell, the overall external dimension is the same as the dimension of the pluggable module of the device to be tested, so that the device to be tested is connected with the device to be tested in a pluggable manner, meanwhile, a main controller, namely a main MCU, is also designed in the shell of the test fixture, and a communication module, a power module and a man-machine interaction module are respectively connected with the main controller, wherein the device to be tested is provided with a weak current interface, the weak current interface adopts a 2*6 double-row socket, one end of the power module is connected with the device to be tested through 1, 2, 3 and 4 terminals of the interface to obtain a power supply, the other end of the power module is connected with the main controller to transmit the power supply obtained from the device to be tested to the main controller, so that the power supply is realized for the whole test fixture, and the main controller is also connected with the device to be tested in a communication manner through the communication module, so that the test fixture can realize communication without connecting a computer.

Further, the power module further comprises a low-dropout linear stabilizer, and the low-dropout linear stabilizer is respectively connected with the device to be tested and the main controller and is used for converting the voltage provided by the device to be tested into the rated voltage of the main controller.

The power supply module further comprises an LDO low dropout linear stabilizer which is respectively connected with the equipment to be tested and the main controller, the low dropout linear stabilizer has the function of subtracting excess voltage from input voltage to generate regulated output voltage, in the embodiment, 12V voltage provided by the equipment to be tested is converted into 5V voltage required by the main controller, namely the testing equipment, and noise is low.

Further, the communication module comprises a serial communication module, and the serial communication module is connected with the equipment to be tested through a serial interface.

Further, the communication module further comprises an RS485 communication module, and the RS485 communication module is connected with the equipment to be tested through an RS485 interface.

The communication module comprises a serial port communication module and an RS485 communication module, wherein the serial port communication module is connected with 5 and 8 terminals of equipment to be tested through a serial interface of the test tool, serial port communication between the test tool and the equipment to be tested is realized, the RS485 communication module is connected with 11 and 12 terminals of the equipment to be tested through an RS485 interface of the test tool, the connecting wire is a flexible wire, RS485 communication between the equipment to be tested and the test tool is realized, and system redundancy is increased through two communication modes of the serial port and the RS485, so that normal operation of the test tool is ensured.

Further, two status indicator lamps are further arranged on the shell, and the status indicator lamps are connected with the output end of the main controller.

Further, the status indicator lamps are a green indicator lamp for successful test and a red indicator lamp for failed test respectively.

The shell of the testing tool is also provided with two testing state indicator lamps, namely a green LED indicator lamp and a red LED indicator lamp, which are respectively connected with the output end of the main controller, when the main controller outputs successful testing, the green indicator lamp is on, and when the testing fails, the red indicator lamp is on, so that the testing result can be known according to the on lamp, and the testing tool is convenient and quick.

Further, a key is further arranged on the shell, and the key is connected with the man-machine interaction module.

The shell of the test tool is also provided with a key connected with the man-machine interaction module and used for triggering a test instruction, wherein the specific test instruction such as a cycle reading current combined active power data block, a specific cycle command and times and the like are all set by a main controller, namely, the inside of a program.

Further, the main controller is a singlechip.

The main controller of the test tool is a singlechip, and has low cost, small volume and portability.

The test tool provided by the utility model has the same appearance as the hot plug module of the equipment to be tested, is small in size and convenient to carry, is provided with an interface for communicating with the equipment to be tested, can realize communication without connecting a computer, and has lower cost.

The working principle of the utility model is as follows:

as shown in fig. 2, the power-on initialization is performed first, the test fixture and the device to be tested are assembled and connected, that is, the test fixture is connected with the weak current interface of the device to be tested in a hot plug mode, and the interface is used for acquiring a power supply from the device to be tested, after the power supply is turned on, a worker presses a key on the test fixture, so as to trigger a test command, the test command is sent to the main MCU, the main MCU sends the test command to the device to be tested through a serial port and an RS485 interface, then the test fixture starts to perform test work, after the work is finished, the test result is returned to the main MCU, the main MCU feeds back the result to the status indicator lamp, when the result is that the test is successful, the green indicator lamp is on, otherwise, the red indicator lamp is on.

Furthermore, it is to be noted that the foregoing has shown and described the basic principles, main features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.

Claims (8)

1. The utility model provides a portable off-line test fixture, its characterized in that, includes the shell, be equipped with main control unit in the shell and respectively with communication module, power module and the human-computer interaction module that main control unit is connected, wherein, power module connects respectively main control unit and equipment to be tested, is used for through equipment to be tested is for main control unit power supply, main control unit passes through communication module with equipment to be tested communication connection.

2. The portable offline testing tool according to claim 1, wherein the power module further comprises a low-dropout linear stabilizer, the low-dropout linear stabilizer being connected to the device under test and the main controller, respectively, and configured to convert a voltage provided by the device under test into a rated voltage of the main controller.

3. The portable off-line testing tool according to claim 1, wherein the communication module comprises a serial communication module, and the serial communication module is connected with the device to be tested through a serial interface.

4. The portable off-line testing tool according to claim 3, wherein the communication module further comprises an RS485 communication module, and the RS485 communication module is connected with the device to be tested through an RS485 interface.

5. The portable off-line testing tool according to claim 1, wherein the housing is further provided with two status indicator lights, and the status indicator lights are connected with the output end of the main controller.

6. The portable off-line testing fixture of claim 5, wherein the status indicator lights are a green indicator light for successful testing and a red indicator light for failed testing, respectively.

7. The portable off-line testing tool according to claim 1, wherein keys are further arranged on the housing and are connected with the man-machine interaction module.

8. The portable off-line testing tool according to claim 1, wherein the main controller is a single-chip microcomputer.