Digital display meter testing device
By designing a digital display meter testing device, which uses sockets and switches to simulate signals, the problem of complex digital display meter testing was solved, enabling rapid testing and signal changes without disassembly, thus simplifying the testing process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIAONING HONGYANHE NUCLEAR POWER
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-05
AI Technical Summary
The testing process of digital display meters is complex, requires disassembly, and the test signals are difficult to change in real time, making it impossible to effectively test fault tolerance.
Design a digital display meter testing device, including a power module, a digital switch, a range switch, a decimal point switch, a first test socket, and a second test socket. The sockets and switches simulate the test signals of the digital display meter to achieve rapid signal changes and detection.
Testing can be performed without disassembling the digital display, simplifying the testing process and quickly determining whether the digital display is displaying an abnormality, thus improving the convenience and efficiency of testing.
Smart Images
Figure CN224202484U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of device testing technology, and in particular to a digital display meter testing device. Background Technology
[0002] A full-range simulator is a training device primarily used for operator training, emergency drills, and accident analysis. It helps operators master operational skills and respond to abnormal situations. A full-range simulator may include a digital display, control system, simulation software, and hardware interfaces. The digital display is an instrument that converts analog signals (such as voltage, current, temperature, and pressure) into digital signals and displays the measured values through a digital tube, LCD screen, or LED display.
[0003] To ensure the proper functioning of the digital display meter, it is necessary to test it regularly. However, the testing process is quite complex due to the need to disassemble the digital display meter from the full-range simulator for testing and the difficulty in changing the test signal in real time. Utility Model Content
[0004] In view of the above problems, this application provides a digital display meter testing device to simplify the digital display meter testing process. The specific solution is as follows:
[0005] The first aspect of this application provides a digital display meter testing device, which includes a power module, a digital switch, a range switch, a decimal point switch, a first test socket for directly connecting to the digital display meter, and a second test socket for connecting to the digital display meter via an adapter cable.
[0006] The positive terminal of the power module is connected to the power terminals of the first test socket and the second test socket, respectively, and the ground terminals of the first test socket and the second test socket are both connected to the negative terminal of the power module.
[0007] The encoding terminal of the first test socket is connected to one side terminal of the digital switch, the digital display range terminal of the first test socket is connected to the range switch, and the digital display decimal point terminal of the first test socket is connected to one side terminal of the decimal point switch.
[0008] The encoding terminal of the second test socket is connected to one side terminal of the digital switch, the digital display range terminal of the second test socket is connected to the range switch, and the digital display decimal point terminal of the second test socket is connected to one side terminal of the decimal point switch.
[0009] The grounding terminal on the other side of the digital switch, the grounding terminal of the range switch, and the grounding terminal on the other side of the decimal point switch are all connected to the negative terminal of the power module.
[0010] In one possible implementation, the terminals of the first test socket are connected to the terminals of the second test socket respectively.
[0011] In one possible implementation, the digital switch includes a first digital switch, a second digital switch, a third digital switch, and a fourth digital switch, and the first test socket includes a first terminal block, a second terminal block, a third terminal block, and a fourth terminal block;
[0012] The encoding terminal of the first terminal block is connected to the first digital switch, the encoding terminal of the second terminal block is connected to the second digital switch, the encoding terminal of the third terminal block is connected to the third digital switch, and the encoding terminal of the fourth terminal block is connected to the fourth digital switch.
[0013] In one possible implementation, the first test socket includes a first terminal block, a second terminal block, a third terminal block, and a fourth terminal block;
[0014] The digital range terminals of the first terminal block, the second terminal block, and the third terminal block are all connected to the range switch.
[0015] In one possible implementation, the first test socket includes a first terminal block, a second terminal block, a third terminal block, and a fourth terminal block;
[0016] The digital decimal point terminals of the first terminal block, the second terminal block, the third terminal block, and the fourth terminal block are all connected to the decimal point switch.
[0017] In one possible implementation, the power module includes a power input socket and a power output module, the power output module including a first voltage positive terminal, a first voltage negative terminal, a second voltage positive terminal and a second voltage negative terminal, and the second test socket including a fifth terminal block and a sixth terminal block;
[0018] The positive terminal of the power input socket is connected to the power output module, and the negative terminal of the power input socket is connected to the power output module.
[0019] The first positive voltage terminal is connected to the power terminal of the first test socket, the second positive voltage terminal is connected to the power terminal of the first test socket, and the ground terminal of the first test socket is connected to the first negative voltage terminal and the second negative voltage terminal respectively.
[0020] The second voltage positive terminal is connected to the power supply terminal of the fifth terminal block, the ground terminal of the fifth terminal block is connected to the second voltage negative terminal, the first voltage positive terminal is connected to the power supply terminal of the sixth terminal block, and the ground terminal of the sixth terminal block is connected to the first voltage negative terminal.
[0021] The grounding terminal of the digital switch is connected to the first negative voltage terminal, the grounding terminal of the range switch is connected to the second negative voltage terminal, and the grounding terminal of the decimal point switch is connected to the second negative voltage terminal.
[0022] In one possible implementation, the digital display test device further includes a second voltage detection line, which is used to detect whether a second voltage is output;
[0023] The second positive voltage terminal of the power output module is connected to the power terminal of the second voltage detection line, and the ground terminal of the second voltage detection line is connected to the second negative voltage terminal of the power output module.
[0024] In one possible implementation, the digital display testing device further includes a test button for determining whether the digital display is showing an image;
[0025] The test buttons are connected to the encoding terminal and the digital display decimal point terminal of the first test socket, respectively, and the test buttons are connected to the encoding terminal and the digital display decimal point terminal of the second test socket, respectively.
[0026] In one possible implementation, the first test socket includes a first terminal block, a second terminal block, a third terminal block, and a fourth terminal block, each terminal block including multiple coded terminals;
[0027] The target encoding terminals of the first terminal block, the second terminal block, the third terminal block, and the fourth terminal block are all connected to the test button, and the terminal positions of the target encoding terminals of the first terminal block, the second terminal block, the third terminal block, and the fourth terminal block are the same.
[0028] In one possible implementation, a diode is provided on the connection line between the test button and the first test socket, and the diode is also provided on the connection line between the test button and the second test socket.
[0029] By employing the above technical solution, this application provides a digital display meter testing device. This device can connect to a digital display meter via a first test socket or a second test socket. The digital display meter can be directly plugged into the first test socket for testing, while a digital display meter operating in a full-range simulator can also be tested by connecting to the second test socket via an adapter cable, without disassembling the digital display meter. Furthermore, this device simulates the test signals of the digital display meter through a digital switch, a range switch, and a decimal point switch, which can quickly meet the various test signal requirements of the digital display meter to determine whether the digital display meter is displaying abnormalities. Changing the test signals is achieved through switch operations, making it more convenient and efficient. Therefore, this device can effectively simplify the testing process of digital display meters. Attached Figure Description
[0030] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.
[0031] Figure 1 A schematic diagram of the structure of a digital display test device provided in an embodiment of this application;
[0032] Figure 2 This is a schematic diagram of the structure of a power module provided in an embodiment of this application;
[0033] Figure 3 This is a schematic diagram of the structure of a second voltage detection circuit provided in an embodiment of this application;
[0034] Figure 4 A schematic diagram of a digital switch provided in an embodiment of this application;
[0035] Figure 5 This application provides a schematic diagram illustrating the connection between a first test socket and a digital switch.
[0036] Figure 6 A schematic diagram illustrating the connection between a first test socket, a range switch, and a decimal point switch, provided in an embodiment of this application;
[0037] Figure 7 This application provides a schematic diagram illustrating the connection between a second test socket and a digital switch.
[0038] Figure 8 A schematic diagram illustrating the connection between a second test socket, a range switch, and a decimal point switch, provided in an embodiment of this application;
[0039] Figure 9 This is a schematic diagram illustrating the connection between a first test socket and a test button, provided in an embodiment of this application.
[0040] Figure label:
[0041] 1-Power module; 2-Digital switch; 3-Range switch; 4-Decimal point switch; 5-First test socket; 6-Second test socket; 7-Power input socket; 8-Power output module; 9-First terminal block; 10-First digital switch; 11-Second terminal block; 12-Second digital switch; 13-Third terminal block; 14-Third digital switch; 15-Fourth terminal block; 16-Fourth digital switch; 17-Fifth terminal block; 18-Sixth terminal block; 19-Test button. Detailed Implementation
[0042] The embodiments of this application are described below with reference to the accompanying drawings. The terminology used in the implementation section of this application is for explaining specific embodiments only and is not intended to limit the scope of this application.
[0043] The embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.
[0044] The terms "first," "second," etc., used in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of units is not necessarily limited to those units, but may include other units not explicitly listed or inherent to those processes, methods, products, or apparatuses.
[0045] A full-range simulator can replicate a nuclear power plant's main control room at a 1:1 scale, used for operator training, emergency drills, and accident analysis. Its components include digital displays, a control system, simulation software, and hardware interfaces. The digital display is an instrument that converts analog signals (such as voltage, current, temperature, and pressure) into digital signals and displays the measured values through a digital tube, LCD screen, or LED display. Its function is to display key nuclear power plant parameters (temperature, pressure, etc.) in real time. The digital display needs to have high reliability, fast response, anti-interference design, and comply with nuclear power safety standards.
[0046] To ensure the normal use of digital display meters, they need to be tested. However, the testing process is quite complicated because the digital display meters need to be disassembled from the full-range simulator for testing, and the test signals are difficult to change in real time. Furthermore, it is impossible to artificially create abnormal signals to test the fault tolerance of the digital display meters.
[0047] To address the aforementioned problems, this application provides a digital display meter testing device. The digital display meter testing device of this application embodiment will be described in detail below with reference to the accompanying drawings.
[0048] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of a digital display test device provided in an embodiment of this application, as shown below. Figure 1 As shown in the embodiment of this application, a digital display meter testing device may include a power module 1, a digital switch 2, a range switch 3, a decimal point switch 4, a first test socket 5 for directly connecting to the digital display meter, and a second test socket 6 for connecting to the digital display meter via an adapter cable.
[0049] The positive terminal of power module 1 is connected to the power terminal of the first test socket 5 and the power terminal of the second test socket 6, respectively. The grounding terminal of the first test socket 5 and the grounding terminal of the second test socket 6 are both connected to the negative terminal of power module 1.
[0050] The encoding terminal of the first test socket 5 is connected to one side terminal of the digital switch 2, the digital display range terminal of the first test socket 5 is connected to the range switch 3, and the digital display decimal point terminal of the first test socket 5 is connected to one side terminal of the decimal point switch 4.
[0051] The encoding terminal of the second test socket 6 is connected to one side terminal of the digital switch 2, the digital display range terminal of the second test socket 6 is connected to the range switch 3, and the digital display decimal point terminal of the second test socket 6 is connected to one side terminal of the decimal point switch 4.
[0052] The grounding terminal on the other side of the digital switch 2, the grounding terminal on the range switch 3, and the grounding terminal on the other side of the decimal point switch 4 are all connected to the negative terminal of the power module 1.
[0053] In this embodiment, the power module 1, digital switch 2, range switch 3, decimal point switch 4, first test socket 5, and second test socket 6 can all be mounted on a single PCB motherboard to achieve the connection and function between the various parts.
[0054] The power supply module is used to supply power to other parts of the digital display testing device. For example... Figure 2As shown, the power module may include a power input socket 7 and a power output module 8. The positive terminal of the power input socket 7 is connected to the power output module 8, and the negative terminal of the power input socket 7 is connected to the power output module 8. The power output module 8 includes a first voltage positive terminal, a first voltage negative terminal, a second voltage positive terminal, and a second voltage negative terminal. In this embodiment, the power input socket is used to connect to an external power source (which can be a 24V DC power source), and the power output socket is used to convert the voltage of the external power source into a voltage suitable for each component. The power output module can specifically be an isolated power module (a power conversion device that completely isolates the input power source from the output power source). Therefore, the first voltage is different from the second voltage; in this embodiment, the first voltage is 24V, and the second voltage is 5V. Specifically, since the range switch and decimal point switch require different voltages than other parts, this embodiment uses the power output module to convert the 24V voltage from the power input socket into 24V and 5V voltages.
[0055] like Figure 2 As shown, the connection lines between the power input socket 7 and the power output module 8 may include a diode, a Zener diode, an inductor, a capacitor, and a fuse. The Zener diode is connected in parallel with the power input socket. The diode and inductor are connected sequentially to the positive terminal of the power input socket. The fuse and capacitor are connected sequentially to the negative terminal of the power input socket. The negative terminal of the power input socket is divided into two parts: one part directly connects to the power output module as the negative terminal for 24V, and the other part has a capacitor connected before connecting to the power output module as the negative terminal for 5V.
[0056] The connection between the power output module and the first test socket can be as follows: the first positive voltage terminal of the power output module is connected to the power terminal of the first test socket; the second positive voltage terminal of the power output module is connected to the power terminal of the first test socket; and the grounding terminal of the first test socket is connected to the first negative voltage terminal and the second negative voltage terminal of the power output module. Specifically, the first test socket may include a first terminal block, a second terminal block, a third terminal block, and a fourth terminal block. Each terminal block has 24V and 5V power terminals and a grounding terminal. Therefore, the first positive voltage terminal of the power output module is connected to the corresponding 24V power terminal on each terminal block; the second positive voltage terminal of the power output module is connected to the corresponding 5V power terminal on each terminal block; the 24V grounding terminal on each terminal block is connected to the corresponding first negative voltage terminal; and the 5V grounding terminal on each terminal block is connected to the corresponding second negative voltage terminal.
[0057] The connection between the power output module and the second test socket can be as follows: the first and second positive voltage terminals of the power output module are both connected to the power terminals of the second test socket, and the ground terminal of the second test socket is connected to the first and second negative voltage terminals of the power output module. Specifically, the second test socket may include a fifth terminal block and a sixth terminal block. The fifth terminal block has a 5V power terminal and a ground terminal, and the sixth terminal block has a 24V power terminal and a ground terminal. Therefore, the second positive voltage terminal of the power output module is connected to the power terminal (5V) of the fifth terminal block, the ground terminal (5V) of the fifth terminal block is connected to the second negative voltage terminal, the first positive voltage terminal is connected to the power terminal (24V) of the sixth terminal block, and the ground terminal (24V) of the sixth terminal block is connected to the first negative voltage terminal.
[0058] Since the digital switch, range switch, and decimal point switch are connected to either the first or second test socket, they are indirectly connected to the positive terminal of the power output module, and directly connected to the negative terminal of the power output module. Specifically, since the range switch and decimal point switch require 5V, and the digital switch requires 24V, the 24V ground terminal of the digital switch is connected to the first negative voltage terminal, the 5V ground terminal of the range switch is connected to the second negative voltage terminal, and the 5V ground terminal of the decimal point switch is connected to the second negative voltage terminal.
[0059] Furthermore, this embodiment includes a second voltage detection circuit for the power output module. The function of the second voltage detection circuit is to detect whether the power output module outputs a second voltage. Figure 3 As shown, the second voltage detection circuit may include a capacitor, a resistor, and an LED. The positive terminal of the second voltage from the power output module 8 is connected to the power terminal of the second voltage detection circuit, and the ground terminal of the second voltage detection circuit is connected to the negative terminal of the second voltage from the power output module 8. The capacitor is connected in parallel to the positive and negative terminals of the second voltage detection circuit, and the resistor and LED are connected sequentially on the circuit. When the power output module outputs the second voltage, the LED will light up normally, indicating that the power output module has output the second voltage.
[0060] A digital switch can be a switch that controls digital digits to control the analog signal input of a digital display. Specifically, in this embodiment, the digital switches include a first digital switch, a second digital switch, a third digital switch, and a fourth digital switch. The first digital switch can represent the thousands digit and is used to control the digital encoding of the thousands digit; the second digital switch can represent the hundreds digit and is used to control the digital encoding of the hundreds digit; the third digital switch can represent the tens digit and is used to control the digital encoding of the tens digit; and the fourth digital switch can represent the units digit and is used to control the digital encoding of the units digit. Each digital switch can include four encoding terminals, allowing all digital switches to be used to simulate 16-channel DO signal input. 16-channel DO signal means having 16 independent digital output channels, each of which can independently output a 0 or 1 signal.
[0061] Specifically, such as Figure 4 As shown, each digital switch can use a 4-bit DIP switch to implement BCD encoding. A DIP (Dual In-line Package Switch) is a small manual electronic switch. BCD encoding is a binary representation of decimal numbers. Specifically, this embodiment uses 8421 BCD code. The four encoding terminals of each digital switch are labeled 1, 2, 3, and 4, with corresponding BCD binary weights of 8, 4, 2, and 1. By controlling the different connections of the four encoding terminals through the switch, different decimal numbers can be represented. The specific connection methods are shown in Table 1.
[0062] Table 1
[0063]
[0064] The DIP switch positions in the table above represent the connection of different labeled coded terminals of the digital switch. For example, 0000 indicates that none of the four coded terminals of a digital switch are connected. Another example is that the DIP switch position for the first digital switch is 0001, indicating that only coded terminals labeled 4 are connected in the first digital switch. Figure 4 When switch #4 is switched on, the thousands digit of the digital display should show the value 1. The third digital switch's DIP switch position is 0011, indicating that terminal 3 and terminal 4 of the third digital switch are connected. Figure 4 (When switches 3 and 4 are switched on and connected), the tens digit of the digital display should show the value 3.
[0065] The range switch controls the range of the digital display, while the decimal point switch controls the position of the decimal point. Both the range switch and the decimal point switch can be 4-digit DIP switches. Different connection methods between the range switch and the decimal point switch can control the range of numbers displayed on the digital display. Specific connection methods are shown in Table 2.
[0066] Table 2
[0067]
[0068] The DIP switch positions in the table above represent the connection of different labeled coded terminals of the decimal point switch and range switch. For example, a DIP switch position of 0010 indicates that only coded terminal number 3 is connected at this time. Figure 4 (With switch #3 switched on and connected), the range switch's DIP switch position is 1010, indicating that the range switch's 1-code terminal and 3-code terminal are connected at this time. Figure 4 (When switches 1 and 3 are switched on and connected), the display range of the A-type digital display is 0.0 to 999.9.
[0069] In another optional embodiment, under the same connection method of the range switch and decimal point switch, the display range of different types of digital displays can be the same or different. Specifically, as shown in Table 2 of this embodiment, when the digital display type is type A (display range does not carry negative numbers), different connection methods of the range switch and decimal point switch can correspond to the display range of three digital displays respectively, while when the digital display type is type B (display range carries negative numbers), different connection methods of the range switch and decimal point switch can correspond to the two display ranges of the digital display respectively.
[0070] The first test socket is for directly connecting a digital display meter. It can directly test digital display meters that are not yet installed on the full-range simulator. After the digital display meter is connected to the first test socket, when viewed from above, the decimal point on the digital display meter should be at the bottom (near the power module), confirming that the digital display meter is not inserted backwards. The second test socket is for connecting an adapter cable. The adapter cable connects to the adapter board and then to the digital display meter, allowing testing of a running digital display meter. After the digital display meter is connected to the second test socket, when viewed from above, the decimal point on the digital display meter should also be at the bottom, confirming that the digital display meter is not inserted backwards. The adapter board used in this embodiment consists of two simple horn-shaped connectors, four bus slots for soldering plug-in terminal blocks, and a PCB board. The terminal settings of the two simple horn-shaped connectors can be the same as the second test socket, while the four plug-in terminal blocks can be the same as the first test socket. The terminals of the horn-shaped connectors and the plug-in terminal blocks are connected correspondingly on the PCB board. One end of the adapter cable connects to the second test socket, and the other end connects to the two horn-shaped sockets on the adapter board. The plug-in type terminals on the adapter board are plugged into the digital display meter.
[0071] The first test socket and the second test socket can be connected, and the terminals of the first test socket and the second test socket can be connected accordingly. In this case, the power module is connected to the second test socket, the second test socket is connected to the first test socket, and the second test socket is connected to the digital switch, the range switch, and the decimal point switch. Of course, the first test socket and the second test socket can also not be connected, and each can be connected to the power module, the digital switch, the range switch, and the decimal point switch respectively.
[0072] In this embodiment, the first test socket may include a first terminal block, a second terminal block, a third terminal block, and a fourth terminal block. The first terminal block may represent the thousands digit, the second terminal block may represent the hundreds digit, the third terminal block may represent the tens digit, and the fourth terminal block may represent the units digit. Therefore, as... Figure 5 As shown, the encoding terminals of each terminal block can be connected to the corresponding encoding terminals of their respective digital switches. The encoding terminals of the first terminal block 9 can be connected to the first digital switch 10, the encoding terminals of the second terminal block 11 can be connected to the second digital switch 12, the encoding terminals of the third terminal block 13 can be connected to the third digital switch 14, and the encoding terminals of the fourth terminal block 15 can be connected to the fourth digital switch 16. Figure 6 As shown, the digital display range terminals of the first terminal block 9, the second terminal block 11, and the third terminal block 13 can all be connected to the range switch 3, and the digital display decimal point terminals of the first terminal block 9, the second terminal block 11, the third terminal block 13, and the fourth terminal block 15 can all be connected to the decimal point switch 4.
[0073] In this embodiment, the second test socket may include a fifth terminal block and a sixth terminal block. The fifth terminal block may represent the thousands and hundreds digits, and the sixth terminal block may represent the hundreds and units digits. Therefore, as... Figure 7 As shown, the encoding terminals of the fifth terminal block 17 can all be connected to the first digital switch 10 and the second digital switch 12, and the encoding terminals of the sixth terminal block 18 can all be connected to the third digital switch 14 and the fourth digital switch 16. Figure 8 As shown, the digital display range terminal of the fifth terminal block 17 and the digital display range terminal of the sixth terminal block 18 can both be connected to the range switch 3, and the digital display decimal point terminal of the fifth terminal block 17 and the digital display decimal point terminal of the sixth terminal block 18 can both be connected to the decimal point switch 4.
[0074] In this embodiment, the first terminal block, the second terminal block, the third terminal block, the fourth terminal block, the fifth terminal block, and the sixth terminal block can all be wire-bonded gold finger sockets.
[0075] Furthermore, in this embodiment, the digital display meter testing device can also be equipped with a test button. In this embodiment, the test button can be a self-locking button (which, through its own structure or circuit design, maintains its current state (on or off) after being pressed, and only resets when pressed again). This test button can be used to determine whether the digital display meter is displaying, thereby determining whether the digital display tube of the digital display meter is damaged. When there is no connection between the first test socket and the second test socket, the test button can be connected to the encoding terminal and the digital display decimal point terminal of the first test socket, respectively. The test button can also be connected to the encoding terminal and the digital display decimal point terminal of the second test socket, respectively. Of course, in another optional embodiment, when there is a connection between the first test socket and the second test socket, the test button can only be connected to the encoding terminal and the digital display decimal point terminal of the first test socket. During the testing of the digital display meter, when the test button is pressed, the connecting piece inside the test button slides upward (…). Figure 9 The rectangular test button 19 can slide upwards, and the decimal point test terminal and the grounding terminal of the test button are connected. Figure 9 The decimal point test terminal and GND1 terminal can be connected), and the encoding terminal and another grounding terminal can be connected. Figure 9 (The test terminal and GND terminal of the 8-test can be connected). Specifically, when the test button is pressed to connect the terminals, "8.8.8.8." will be displayed on the A-type digital display, and "-8.8.8." will be displayed on the B-type digital display, indicating that the digital display can display normally at this time.
[0076] Since there is a corresponding relationship between the terminals of the first test socket and the second test socket, taking the first test socket as an example, since the first test socket in this embodiment may include a first terminal block, a second terminal block, a third terminal block, and a fourth terminal block, and each terminal block includes multiple coded terminals, the specific connection method between the test button and the first test socket is as follows: Figure 9 As shown, the target encoding terminals of the first terminal block 9, the second terminal block 11, the third terminal block 13, and the fourth terminal block 15 are all connected to the test button 19. The terminal positions of these terminals are the same (i.e., they have the same BCD code binary weight). In this embodiment, all are selected as encoding terminals with a BCD code binary weight of 8. Figure 9 As shown, the digital decimal point terminals of the first terminal block 9, the second terminal block 11, the third terminal block 13, and the fourth terminal block 15 are all connected to the test button 19. In this embodiment, a diode is provided on the connection line between the test button and the first test socket, and a diode is also provided on the connection line between the test button and the second test socket to prevent mutual interference between the encoding signal and the decimal point signal connected to the test button.
[0077] This application provides a digital display meter testing device. The device can connect to a digital display meter via a first test socket or a second test socket. The digital display meter can be directly plugged into the first test socket for testing. A digital display meter operating in a full-range simulator can also be tested by connecting to the second test socket via an adapter cable, without disassembling the digital display meter. Furthermore, this device simulates the test signals of the digital display meter through a digital switch, a range switch, and a decimal point switch, quickly meeting various test signal requirements of the digital display meter to determine if it is displaying an abnormality. Changing the test signal is achieved through switch operations, making it more convenient and efficient. Therefore, this device effectively simplifies the testing process of digital display meters.
[0078] It is understood that before using the technical solutions disclosed in the various embodiments of this disclosure, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in this disclosure in an appropriate manner in accordance with relevant laws and regulations, and user authorization should be obtained.
[0079] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A digital display meter testing device, characterized in that, The digital display meter testing device includes a power module, a digital switch, a range switch, a decimal point switch, a first test socket for directly connecting to the digital display meter, and a second test socket for connecting to the digital display meter via an adapter cable. The positive terminal of the power module is connected to the power terminals of the first test socket and the second test socket, respectively, and the ground terminals of the first test socket and the second test socket are both connected to the negative terminal of the power module. The encoding terminal of the first test socket is connected to one side terminal of the digital switch, the digital display range terminal of the first test socket is connected to the range switch, and the digital display decimal point terminal of the first test socket is connected to one side terminal of the decimal point switch. The encoding terminal of the second test socket is connected to one side terminal of the digital switch, the digital display range terminal of the second test socket is connected to the range switch, and the digital display decimal point terminal of the second test socket is connected to one side terminal of the decimal point switch. The grounding terminal on the other side of the digital switch, the grounding terminal of the range switch, and the grounding terminal on the other side of the decimal point switch are all connected to the negative terminal of the power module.
2. The digital display testing device according to claim 1, characterized in that, The terminals of the first test socket are connected to the terminals of the second test socket.
3. The digital display meter testing device according to claim 1, characterized in that, The digital switch includes a first digital switch, a second digital switch, a third digital switch, and a fourth digital switch, and the first test socket includes a first terminal block, a second terminal block, a third terminal block, and a fourth terminal block; The encoding terminal of the first terminal block is connected to the first digital switch, the encoding terminal of the second terminal block is connected to the second digital switch, the encoding terminal of the third terminal block is connected to the third digital switch, and the encoding terminal of the fourth terminal block is connected to the fourth digital switch.
4. The digital display testing device according to claim 1, characterized in that, The first test socket includes a first terminal block, a second terminal block, a third terminal block, and a fourth terminal block; The digital range terminals of the first terminal block, the second terminal block, and the third terminal block are all connected to the range switch.
5. The digital display meter testing device according to claim 1, characterized in that, The first test socket includes a first terminal block, a second terminal block, a third terminal block, and a fourth terminal block; The digital decimal point terminals of the first terminal block, the second terminal block, the third terminal block, and the fourth terminal block are all connected to the decimal point switch.
6. The digital display meter testing device according to claim 1, characterized in that, The power module includes a power input socket and a power output module. The power output module includes a first voltage positive terminal, a first voltage negative terminal, a second voltage positive terminal, and a second voltage negative terminal. The second test socket includes a fifth terminal block and a sixth terminal block. The positive terminal of the power input socket is connected to the power output module, and the negative terminal of the power input socket is connected to the power output module. The first positive voltage terminal is connected to the power terminal of the first test socket, the second positive voltage terminal is connected to the power terminal of the first test socket, and the ground terminal of the first test socket is connected to the first negative voltage terminal and the second negative voltage terminal respectively. The second voltage positive terminal is connected to the power supply terminal of the fifth terminal block, the ground terminal of the fifth terminal block is connected to the second voltage negative terminal, the first voltage positive terminal is connected to the power supply terminal of the sixth terminal block, and the ground terminal of the sixth terminal block is connected to the first voltage negative terminal. The grounding terminal of the digital switch is connected to the first negative voltage terminal, the grounding terminal of the range switch is connected to the second negative voltage terminal, and the grounding terminal of the decimal point switch is connected to the second negative voltage terminal.
7. The digital display testing device according to claim 6, characterized in that, The digital display test device also includes a second voltage detection line, which is used to detect whether a second voltage is output. The second positive voltage terminal of the power output module is connected to the power terminal of the second voltage detection line, and the ground terminal of the second voltage detection line is connected to the second negative voltage terminal of the power output module.
8. The digital display testing device according to claim 1, characterized in that, The digital display testing device also includes a test button, which is used to determine whether the digital display is showing; The test buttons are connected to the encoding terminal and the digital display decimal point terminal of the first test socket, respectively, and the test buttons are connected to the encoding terminal and the digital display decimal point terminal of the second test socket, respectively.
9. The digital display testing device according to claim 8, characterized in that, The first test socket includes a first terminal block, a second terminal block, a third terminal block, and a fourth terminal block, each terminal block including multiple coded terminals; The target encoding terminals of the first terminal block, the second terminal block, the third terminal block, and the fourth terminal block are all connected to the test button, and the terminal positions of the target encoding terminals of the first terminal block, the second terminal block, the third terminal block, and the fourth terminal block are the same.
10. The digital display meter testing device according to claim 8, characterized in that, A diode is provided on the connection line between the test button and the first test socket, and the diode is also provided on the connection line between the test button and the second test socket.