Automatic calibration device of equipment test equipment

Abstract

The embodiment of the invention provides an automatic calibration device for equipment test equipment, and the device comprises a matrix switch which comprises a plurality of horizontal flat cables and a plurality of vertical flat cables, each horizontal flat cable is provided with a switch at a node where the horizontal flat cables intersect with any vertical flat cable, and the vertical flat cables of the matrix switch are connected with the test equipment; the LXI bus signal source is connected with the horizontal flat cable of the matrix switch; the LXI bus oscilloscope is connected with the horizontal flat cable of the matrix switch; the LXI bus universal meter is connected with the horizontal flat cable of the matrix switch; one end of the network switch is connected with the LXI bus signal source, the LXI bus oscilloscope and the LXI bus universal meter, and the other end of the network switch is connected with test equipment; and a computer on the test equipment acquires signals required by the test equipment through the LXI bus signal source, and tests the signals output when the test equipment is calibrated through the LXI bus oscilloscope and the LXI bus universal meter.

Description

Technical Field

[0001] The invention relates to the technical field of equipment and component product testing, in particular to an automatic calibration device for equipment testing equipment. Background Art

[0002] Equipment and its components must be tested and inspected before leaving the factory and when used by users. Testing equipment has evolved from the initial use of general instruments such as multimeters and oscilloscopes to later analog electronic equipment. These devices have disadvantages such as low testing efficiency and inconvenient use. With the development of computer technology, test equipment has also developed into an era of intelligent testing where computers are widely used for automated testing. Currently, test equipment is basically based on the hardware platform of the PCI (Peripheral Component Interconect, peripheral component interconnection standard) or PXI (PCI eXtention for Instrumentation, PCI extension in the field of instrumentation) bus, using virtual instrument technology, and using computers to realize automated testing functions.

[0003] The test equipment must be calibrated at the factory before leaving the factory, and must also be calibrated regularly during the later use process. The current calibration method of the test equipment is to manually check and calibrate all input and output channels one by one. Because the number of test and output signals of the equipment test equipment is huge, the input and output channels of the test equipment are also large, and the calibration workload is very large. In addition, during calibration, the operator can easily make mistakes in the connection position of the signal and the voltage value of the signal, causing damage to the equipment. Summary of the invention

[0004] In view of the problem in the prior art that equipment manufacturing factories and users have a large workload for calibrating equipment testing equipment and are prone to errors that may cause equipment damage, an embodiment of the present invention provides an automatic calibration device for equipment testing equipment, which can automatically calibrate the testing equipment, improve calibration efficiency, and prevent accidents that damage the equipment.

[0005] An embodiment of the present invention provides an automatic calibration device for equipment testing equipment, comprising:

[0006] A matrix switch, comprising a plurality of horizontal lines and a plurality of vertical lines, each horizontal line being provided with a switch at a node intersecting with any vertical line, and the vertical lines of the matrix switch being connected to the test equipment;

[0007] An LXI bus signal source connected to the horizontal lines of the matrix switch;

[0008] An LXI bus oscilloscope connected to the horizontal lines of the matrix switch;

[0009] An LXI bus multimeter connected to the horizontal lines of the matrix switch;

[0010] A network switch, one end of which is connected to the LXI bus signal source, the LXI bus oscilloscope and the LXI bus multimeter, and the other end of which is connected to a test device;

[0011] The computer on the test device acquires the signal required by the test device through the LXI bus signal source, and performs a signal test output during calibration of the test device through the LXI bus oscilloscope and the LXI bus multimeter.

[0012] In some embodiments of the present invention, the computer of the test device is provided with calibration software developed based on virtual instrument technology, and the calibration software can be used to control the signal source to output corresponding signals, and switch the matrix switch to the input channel of the test device channel by channel, so as to automatically calibrate the input channel of the test device;

[0013] The output signal of the test equipment is switched channel by channel by the matrix switch to the oscilloscope or multimeter of the calibration device, and the output channel of the test equipment is tested and calibrated automatically;

[0014] After the calibration is completed, the calibration software will automatically give the calibration results.

[0015] In some embodiments of the present invention, the network switch is connected to a network interface on the test device via a network cable to transmit a control signal.

[0016] In some embodiments of the present invention, the test equipment automatic calibration device is connected via a dedicated cable of the test equipment to transmit the test signal.

[0017] In some embodiments of the present invention, the dedicated cable is a single-head cable or a multi-head cable, and the number of heads of the dedicated cable is set corresponding to the number of external connectors of the test device.

[0018] In some embodiments of the present invention, the network cable and the dedicated cable can form an integrated cable.

[0019] In some embodiments of the present invention, the switch is a single-pole single-throw switch.

[0020] In some embodiments of the present invention, the matrix switch is configured in a cascade manner of multiple switches.

[0021] Compared with the prior art, the automatic calibration device for equipment testing equipment provided by the embodiment of the present invention has the beneficial effects of: it can realize automatic calibration of the testing equipment, improve calibration efficiency, save labor costs, and prevent accidents that damage the testing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of an automatic calibration device for equipment testing equipment provided by an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the structure of an automatic calibration device for equipment testing equipment provided by an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of a matrix switch in an automatic calibration device for equipment testing equipment provided in an embodiment of the present invention.

[0025] Reference numerals

[0026] 1- Automatic calibration device chassis, 2- LXI bus signal source, 3- LXI bus oscilloscope, 4- LXI bus multimeter, 5- Matrix switch, 6- Network cable, 7- Special cable, 8- Test equipment, 9- Computer. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0029] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0030] It should also be understood that, although the present application has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present application that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0031] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0032] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to determine the true intent based on the user's historical operations and to avoid unnecessary or redundant details that make the present application unclear. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but are merely used as the basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0033] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0034] At present, test equipment is basically based on the hardware platform of PCI or PXI bus, using virtual instrument technology, and realizing the automatic test function by computer. Usually, computers have network communication function.

[0035] LXI (Lan eXtention for Instrument, network extension of the instrument field) bus instruments are Ethernet-based instruments and have been widely used in the testing industry. Computers can control and communicate with LXI bus instruments through network interfaces, thereby utilizing the functions of LXI bus instruments.

[0036] like Figure 1 , Figure 2 As shown, the present invention provides an automatic calibration device for testing equipment, including an automatic calibration device chassis 1, wherein the automatic calibration device chassis 1 is internally provided with:

[0037] Matrix switch 5, in one embodiment, the switch is a single-pole single-throw switch, such as Figure 3 The matrix switch 5 includes a plurality of horizontal lines and a plurality of vertical lines, switches are arranged at the nodes where the horizontal lines and the vertical lines intersect, and the vertical lines of the matrix switch 5 are connected to the test equipment;

[0038] LXI bus signal source 2, the LXI bus signal source 2 (including positive and negative electrodes) is connected to the horizontal line of the matrix switch 5;

[0039] An LXI bus oscilloscope 3, wherein the LXI bus oscilloscope 3 (including positive and negative electrodes) is connected to the horizontal lines of the matrix switch 5;

[0040] LXI bus multimeter 4, the LXI bus multimeter 4 (including positive and negative poles) is connected to the horizontal line of the matrix switch 5;

[0041] A network switch, one end of which is connected to the LXI bus signal source 2 , the LXI bus oscilloscope 3 and the LXI bus multimeter 4 , and the other end of which is connected to a test device 8 .

[0042] In this way, the control and communication functions of the above LXI devices can be realized through the computer 9 on the test equipment 8. The signal source realizes various signals required for the calibration of the test equipment, and the oscilloscope and multimeter realize the signal test output during the calibration of the test equipment.

[0043] The matrix switch 5 has a multi-channel signal switching function, and can switch various input and output signals of the test equipment 8 to a signal source, an oscilloscope or a multimeter, etc. as needed.

[0044] Calibration software is developed based on virtual instrument technology on the test equipment computer 9, and the control signal source outputs corresponding signals, which are switched to the test equipment input channels by the matrix switch 5 channel by channel, and the test equipment input channels are automatically calibrated. The output signals of the test equipment are switched to the oscilloscope or multimeter of the calibration device by the matrix switch 5 channel by channel, and the test equipment output channels are automatically calibrated. After the calibration is completed, the calibration software automatically gives the calibration results.

[0045] In one embodiment, the network switch is connected to the network interface on the test device through the network cable 6 to transmit the control signal. Further, the dedicated cable 7 is a single-head cable or a multi-head cable, and the number of heads of the dedicated cable 7 is set corresponding to the number of external connectors of the test device. Furthermore, the network cable 6 and the dedicated cable 7 can also be formed into an integrated cable to transmit the control signal and the test signal at the same time.

[0046] In one embodiment, the matrix switch 5 is configured in a cascade manner with multiple switches.

[0047] like Figure 3 As shown, Figure 3 The schematic diagram of the matrix switch 5 is shown in FIG. Each node in the figure is a single-pole single-throw switch. The signal lines (including positive and negative) of the LXI bus signal source 2, the LXI bus oscilloscope 3, and the LXI bus multimeter 4 are respectively connected to the horizontal lines (Y1 to Y6) of the matrix switch 5, and the vertical lines (X1 to Xn) of the matrix switch 5 are connected to the signals of the test equipment 8 that need to be calibrated. The signals of the test equipment 8 that need to be calibrated are introduced into the calibration device through the connector by the dedicated cable 7. The dedicated cable 7 can be made into a multi-head cable according to the number of external connectors of the test equipment 8.

[0048] The control signals (network signals) of the LXI bus signal source 2, the LXI bus oscilloscope 3 and the LXI bus multimeter 4 are connected to the network interface on the test device through a network cable 6 via a connector after passing through the switch, so that they can be controlled by a computer 9 on the test device.

[0049] The network cable 6 and the dedicated cable 7 can be designed according to the interface type and number of the external connectors of the calibrated test equipment 8. The dedicated cable 7 is a supporting product of the calibrated test equipment 8 and is dedicated to the calibrated test equipment 8.

[0050] The number of vertical lines of the matrix switch 5 is maximized, and if necessary, multiple switches can be cascaded to meet the need for a large number of calibration channels.

[0051] According to the input and output signals of the test device 8 to be calibrated, a dedicated calibration software is developed, and the dedicated calibration software is also dedicated to the test device 8 to be calibrated.

[0052] By connecting the calibration device and running the calibration software on the test equipment computer 9 , the automatic calibration of the test equipment 8 can be realized.

[0053] It can be seen from the above technical solutions that the automatic calibration device for the equipment test equipment provided by the above embodiments of the present invention can realize automatic calibration of the test equipment, improve calibration efficiency, save labor costs, and prevent accidents that damage the test equipment.

[0054] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. An automatic calibration device for equipment testing equipment, characterized in that: include: A matrix switch, comprising a plurality of horizontal lines and a plurality of vertical lines, each horizontal line being provided with a switch at a node intersecting with any vertical line, and the vertical lines of the matrix switch being connected to the test equipment; An LXI bus signal source connected to the horizontal lines of the matrix switch; An LXI bus oscilloscope connected to the horizontal lines of the matrix switch; An LXI bus multimeter connected to the horizontal lines of the matrix switch; A network switch, one end of which is connected to the LXI bus signal source, the LXI bus oscilloscope and the LXI bus multimeter, and the other end of which is connected to a test device; The computer on the test device acquires the signal required by the test device through the LXI bus signal source, and performs a signal test output during calibration of the test device through the LXI bus oscilloscope and the LXI bus multimeter.

2. The automatic calibration device for equipment testing equipment according to claim 1, characterized in that: The computer of the test device is provided with calibration software developed based on virtual instrument technology, and the calibration software can be used to control the signal source to output corresponding signals, and switch the matrix switch to the input channel of the test device channel by channel, so as to automatically calibrate the input channel of the test device; The output signal of the test equipment is switched channel by channel by the matrix switch to the oscilloscope or multimeter of the calibration device, and the output channel of the test equipment is tested and calibrated automatically; After the calibration is completed, the calibration software will automatically give the calibration results.

3. The automatic calibration device for equipment testing equipment according to claim 2, characterized in that: The network switch is connected to the network interface on the test device via a network cable to transmit the control signal.

4. The automatic calibration device for equipment testing equipment according to claim 3, characterized in that: The test equipment automatic calibration device is connected to the test equipment through a dedicated cable of the test equipment to transmit a test signal.

5. The automatic calibration device for equipment testing equipment according to claim 4, characterized in that: The dedicated cable is a single-end cable or a multi-end cable, and the number of ends of the dedicated cable is set corresponding to the number of external connectors of the test equipment.

6. The automatic calibration device for equipment testing equipment according to claim 5, characterized in that: The network cable and the dedicated cable can form an integrated cable.

7. The automatic calibration device for equipment testing equipment according to claim 1, characterized in that: The switch is a single-pole single-throw switch.

8. The automatic calibration device for equipment testing equipment according to claim 1, characterized in that: The matrix switch is arranged in a cascade manner with multiple switches.

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