Universal signal converter capable of setting detection of various electric parameters

Abstract

The utility model relates to the technical field of power distribution signal detection of an electric power department, in particular to a universal signal converter capable of setting various electric quantity parameter detection, which comprises a shell formed by splicing a front panel and a rear cover shell, an input wiring terminal strip, an eight-bit nixie tube, a key module and an output wiring terminal strip are sequentially embedded in the front panel from top to bottom, an upper layer circuit board and a lower layer circuit board are arranged in the rear cover shell, and the lower layer circuit board is electrically connected with the output wiring terminal strip. The upper layer circuit board is electrically connected with the lower layer circuit board through a first plug-in flat cable, the eight-bit nixie tube and the key module are electrically connected with the lower layer circuit board through a second plug-in flat cable, and the lower layer circuit board is provided with a control circuit used for adapting to multi-electric-quantity parameter detection. According to the utility model, the control circuit with the microprocessor as the core is adopted, and test modes and output modes of different parameters can be selected through operation setting, so that convenience is provided for general tests of various electric quantities.

Description

Technical Field

[0001] This utility model relates to the field of power distribution signal detection technology, and in particular to a universal signal converter that can be set to detect multiple electrical parameters. Background Technology

[0002] Multifunctional and versatile power and non-power signal converters are suitable for various industrial scenarios, such as power, electromechanical, petrochemical, railway, rail transit, mining, telecommunications, communications, and monitoring industries. They can convert parameters such as voltage, current, power, pressure, and temperature into electrical signals, which are then transmitted to the monitoring center via wired or wireless means to achieve real-time monitoring and remote control of the production process. In the power industry, power signal converters play a crucial role, converting electrical quantities into computer-recognizable signal outputs for power measurement, transmission, and control. They are widely used in power grid automation, power quality control, and substation operation management. Furthermore, in the new energy field, power converters are also used for monitoring solar and wind power. Designed to meet the needs of intelligent power monitoring and energy metering in these scenarios, these converters can accurately measure common power parameters in three-phase power grids and feature extended functions such as communication interfaces and analog outputs.

[0003] However, ordinary power converters have relatively limited functions. Different power converters are designed according to specific measurement parameters, and various measurement parameters cannot be simultaneously considered. The output analog or digital signals cannot be connected to multiple external circuits. In addition, because the price of fully functional power converters is relatively high, they have not yet been widely used in conventional power distribution systems. Most power converters still use the method of rectifying AC signals into DC signals for power conversion, which results in problems such as current and voltage phase deviation, large conversion accuracy errors, and non-digitalized output signals, which bring inconvenience to signal monitoring in power systems.

[0004] To solve the above problems, we need to develop a universal signal converter that can detect multiple electrical parameters. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a universal signal converter that can set multiple electrical parameters for detection, so as to solve the problems that existing electrical signal converters have relatively simple functions, cannot simultaneously take into account various measurement parameters, and cannot output analog or digital signals that can be connected to multiple external channels.

[0006] Based on the above objectives, this utility model provides a universal signal converter that can be set to detect multiple power parameters, including a housing. The housing is composed of a front panel and a rear cover assembled together. The front panel is inlaid with an input terminal block, an eight-digit digital tube, a key module and an output terminal block from top to bottom.

[0007] The rear cover houses an upper circuit board and a lower circuit board. The upper circuit board is electrically connected to the input terminal block, and the lower circuit board is electrically connected to the output terminal block. The upper circuit board is electrically connected to the lower circuit board via a connector cable. The eight-digit digital tube and the key module are electrically connected to the lower circuit board via a connector cable. The lower circuit board is equipped with a control circuit for detecting multiple electrical parameters.

[0008] Preferably, the front panel has multiple front mounting holes, and the rear cover has multiple rear mounting holes.

[0009] Preferably, the control circuit includes a microprocessor, a metering module, a digital isolation module, a data signal amplification module, an external storage module, an external clock module, an isolation power supply I, an isolation power supply II, a boost power supply module, a voltage output module, a current output module I, a current output module II, a current output module III, and a serial communication module, all mounted on the lower circuit board.

[0010] Preferably, the input terminal block has terminals 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, and 24.

[0011] The output terminal block has terminals 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12.

[0012] Preferably, terminals 13 to 22 in the input terminal block are all connected to the input terminal of the metering module, and terminals 23 and 24 in the input terminal block are connected to the isolation power supply.

[0013] The first isolation power supply is used to supply power to the microprocessor, metering module, external storage module, external clock module, eight-digit LED display, serial communication module and the second isolation power supply.

[0014] The second isolation power supply is used to power the digital isolation module, the data signal amplification module, and the boost power supply module;

[0015] The boost power supply module supplies power to current output module one, current output module two, and current output module three.

[0016] Preferably, the signal interface of the microprocessor is connected to the metering module, and the microprocessor is also connected to an external storage module, an external clock module, an eight-digit LED display, a keypad module, a digital isolation module, and a serial communication module.

[0017] The digital isolation module is connected to the voltage output module and the data signal amplification module, and the voltage output module is connected to terminals 1 and 2 in the output terminal block.

[0018] Furthermore, the data signal amplification module is connected to current output module one, current output module two, and current output module three. Current output module one is connected to terminals 4 and 5 in the output terminal block, current output module two is connected to terminals 6 and 7 in the output terminal block, current output module three is connected to terminals 8 and 9 in the output terminal block, and the serial communication module is connected to terminals 10, 11, and 12 in the output terminal block.

[0019] The beneficial effects of this utility model are as follows: This utility model provides a universal signal converter that can be set to detect multiple electrical parameters. By adopting a control circuit with a microprocessor as the core, it can operate, set, and select different test modes, and can be applied to various electrical detection requirements. Through the multiple precise algorithms of the internal microprocessor circuit, it can achieve the functions of multi-purpose testing, universal detection of various parameters, multi-channel analog signal output, and remote communication without changing the hardware circuit, which provides convenience for the configuration and use of testing equipment in the power sector.

[0020] In addition, the entire circuit is electrically isolated from the input power supply, input electrical signal, output analog signal and communication interface through isolation power supply one, isolation power supply two and boost power supply module, which effectively improves the anti-interference capability of this utility model. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of an embodiment of the present utility model;

[0024] Figure 3This is a schematic diagram of the circuit connection of the control circuit in an embodiment of this utility model.

[0025] In the diagram: 1. Front panel; 2. Rear cover; 3. Upper circuit board; 4. Lower circuit board; 5. Input terminal block; 6. Output terminal block; 7. Microprocessor; 8. Metering module; 9. Digital isolation module; 10. Data signal amplification module; 11. External storage module; 12. External clock module; 13. Eight-digit LED display; 14. Keypad module; 15. Isolation power supply one; 16. Isolation power supply two; 17. Boost power supply module; 18. Voltage output module; 19. Current output module one; 20. Current output module two; 21. Current output module three; 22. Serial communication module; 23. Connector cable one; 24. Connector cable two; 25. Front mounting hole; 26. Rear mounting hole. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0027] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] like Figure 1 , Figure 2 , Figure 3 As shown, a universal signal converter capable of detecting multiple power parameters includes a housing, which is assembled from a front panel 1 and a rear cover 2. The front panel 1 is sequentially fitted with an input terminal block 5, an eight-digit digital tube 13, a key module 14, and an output terminal block 6 from top to bottom. The input terminal block 5 is used to connect to the working power supply line and the power test line, and the output terminal block 6 is used to connect to external communication lines and output multiple analog voltage and current signals.

[0029] The eight-digit LED display 13 consists of eight seven-segment LED displays with a decimal point. The button module 14 consists of three buttons: "Set", "Add / Subtract", and "OK", as well as an anti-shake circuit. The operation of the button module 14 can be displayed on the eight-digit LED display 13 to select more than 20 parameter detections. It can set various output modes for analog and digital quantities, determine the transformation ratio of various parameters, set the address, rate and protocol of serial communication, and display various electrical signal parameters, including the effective value of phase voltage (A, B, C), the effective value of phase current, the active power of each phase, the active power of the combined phase, the reactive power of each phase, the reactive power of the combined phase, the apparent power of each phase, the apparent power of the combined phase, the power factor of the combined phase, and the line frequency.

[0030] The rear cover 2 houses an upper circuit board 3 and a lower circuit board 4. The upper circuit board 3 is electrically connected to the input terminal block 5, and the lower circuit board 4 is electrically connected to the output terminal block 6. The upper circuit board 3 is electrically connected to the lower circuit board 4 via connector cable 23. The eight-digit digital tube 13 and the key module 14 are electrically connected to the lower circuit board 4 via connector cable 24. The lower circuit board 4 is equipped with a control circuit for adapting to the detection of multiple electrical parameters.

[0031] By adopting a control circuit based on a microprocessor 7, it integrates detection algorithms for more than 20 electrical parameters. Through button settings and digital display, users can select and set various test modes for electrical parameters, and choose simultaneous output of multiple analog and data communication channels. This provides a universal option for configuring electrical testing devices in the power sector and greatly facilitates analysis and use by management personnel.

[0032] In a preferred embodiment of this utility model, a plurality of front mounting holes 25 are provided on the front panel 1 and a plurality of rear mounting holes 26 are provided on the rear cover 2. The whole machine can be fixed to the panel side of the test cabinet through the front mounting holes 25, or it can be fixed to the inside of the test cabinet through the rear mounting holes 26.

[0033] In another preferred embodiment of this utility model, the control circuit includes a microprocessor 7, a metering module 8, a digital isolation module 9, a data signal amplification module 10, an external storage module 11, an external clock module 12, an isolation power supply 15, an isolation power supply 2 16, a boost power supply module 17, a voltage output module 18, a current output module 19, a current output module 20, a current output module 3 21, and a serial communication module 22, all mounted on the lower circuit board 4.

[0034] The input terminal block 5 has terminals 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 and 24.

[0035] Terminals 23 and 24 in input terminal block 5 are power input terminals, connected to an external DC 24V power supply. Terminal 23 is IN+ and terminal 24 is IN-, providing power to the internal circuitry of the entire unit. Terminals 17 to 22 in input terminal block 5 are current input terminals, connected to three different phase currents from a three-phase power supply. Terminals 21 and 22 are connected to phase A current Ia, terminals 19 and 20 are connected to phase B current Ib, and terminals 17 and 18 are connected to phase C current Ic. Terminals 13 to 16 in input terminal block 5 are connected to three-phase voltages. Terminal 16 is connected to phase A voltage Ua, terminal 15 is connected to phase B voltage Ub, terminal 14 is connected to phase C voltage Uc, and terminal 13 is connected to the voltage neutral point Un.

[0036] The output terminal block 6 has terminals 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12.

[0037] Terminals 10 to 12 in output terminal block 6 are serial communication terminals for connecting to an external RS-485 communication device. Terminal 12 is the positive communication terminal A+, terminal 11 is the negative communication terminal B-, and terminal 10 is the signal ground terminal G. Terminals 4 to 9 in output terminal block 6 are three-channel current output terminals, used to provide three independent 4-20mA or 0-20mA current signals. Terminals 4 and 5 are current output 1 AI1, terminals 6 and 7 are current output 2 AI2, and terminals 8 and 9 are current output 3 AI3. Terminals 1 and 2 in output terminal block 6 are voltage output terminals, used to output a 0-5V voltage signal DI. These multi-channel analog signals contain various data after detection and conversion.

[0038] Terminals 13 to 22 in the input terminal block 5 are all connected to the input terminal of the metering module 8, and terminals 23 and 24 in the input terminal block 5 are connected to the isolation power supply 15.

[0039] Isolation power supply 15 is used to supply power to microprocessor 7, metering module 8, external storage module 11, external clock module 12, eight-digit LED display 13, serial communication module 22 and isolation power supply 26.

[0040] The isolation power supply 15 outputs two 5V and one 3.3V power supply. The 3.3V power supply powers the microprocessor 7, the one 5V power supply powers the metering module 8, the external storage module 11 and the external clock module 12, and the other 5V power supply powers the eight-digit LED display 13, the serial communication module 22 and the isolation power supply 16.

[0041] The isolation power supply 16 is used to supply power to the digital isolation module 9, the data signal amplification module 10, and the boost power supply module 17;

[0042] After internal isolation transformation, the isolation power supply 16 outputs two 5V power supplies. One 5V power supply powers the digital isolation module 9 and the data signal amplification module 10, while the other 5V power supply is connected to the boost power supply module 17.

[0043] The boost power supply module 17 supplies power to the current output module 19, the current output module 20, and the current output module 31.

[0044] After internal isolation and transformation, the boost power module 17 outputs three independent 24V power supplies, which are used by the three current output modules respectively.

[0045] The microprocessor 7's signal interface connects to the metering module 8 to acquire multiple power acquisition signals; the microprocessor 7 connects to the external storage module 11 to save data information; the microprocessor 7 connects to the external clock module 12 to acquire a reference clock, which can provide real-time information when exchanging data with external devices; the microprocessor 7 connects to the eight-digit LED display 13 to drive the display settings, communication, and measurement data; the microprocessor 7 connects to the button module 14 to acquire various manually set instructions; the microprocessor 7 also connects to the digital isolation module 9 to transmit various power detection data.

[0046] Digital isolation module 9 is connected to voltage output module 18 and data signal amplification module 10. Digital isolation module 9 outputs one signal to voltage output module 18 and three signals to data signal amplification module 10. Voltage output module 18 is connected to terminal 1 and terminal 2 in output terminal block 6 and outputs analog voltage signal.

[0047] Furthermore, the data signal amplification module 10 is connected to the current output module 19, the current output module 20, and the current output module 31. The data signal amplification module 10 amplifies and calibrates the three data signals and then connects them to the three current output modules respectively. The current output module 19 is connected to terminals 4 and 5 in the output terminal block 6, the current output module 20 is connected to terminals 6 and 7 in the output terminal block 6, and the current output module 3 is connected to terminals 8 and 9 in the output terminal block 6, respectively, and outputs three independent analog current signals. The serial communication module 22 is connected to terminals 10, 11, and 12 in the output terminal block 6.

[0048] The entire circuit is electrically isolated from the input power supply, input electrical signal, output analog signal and communication interface through isolation power supply 15, isolation power supply 2 16 and boost power supply module 17, which effectively improves the anti-interference capability of this utility model.

[0049] This utility model discloses a universal signal converter capable of detecting multiple electrical parameters, which effectively solves the problem of comprehensive acquisition of various electrical parameters in the power sector. It enables a multi-functional and multi-purpose electrical signal converter to undertake various electrical testing functions. Through human-machine dialogue settings, different electrical parameters can be set and selected for measurement. It can select multiple analog signal outputs of current and voltage, and can use serial communication to realize long-distance real-time signal data transmission. This makes electrical parameter conversion and measurement devices develop towards intelligence, bringing convenience to the operation and management of power systems.

[0050] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0051] The embodiments of this utility model are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A general signal converter capable of setting various electric quantity parameter detection, comprising a shell, characterized in that, The shell is composed of a front panel (1) and a rear cover (2) by assembling, the front panel (1) is sequentially embedded with an input terminal block (5), an eight-digit nixie tube (13), a key module (14) and an output terminal block (6) from top to bottom; The rear cover (2) is provided with an upper layer circuit board (3) and a lower layer circuit board (4), the upper layer circuit board (3) is electrically connected with the input terminal block (5), the lower layer circuit board (4) is electrically connected with the output terminal block (6), the upper layer circuit board (3) is electrically connected with the lower layer circuit board (4) through a plug-in wire (23), the eight-digit nixie tube (13) and the key module (14) are electrically connected with the lower layer circuit board (4) through a plug-in wire (24), and the lower layer circuit board (4) is provided with a control circuit for adapting to multi-parameter detection.

2. The universal signal converter of claim 1, wherein, A plurality of front mounting holes (25) are formed in the front panel (1), and a plurality of rear mounting holes (26) are formed in the rear cover (2).

3. The universal signal converter of claim 1, wherein, The control circuit comprises a microprocessor (7), a metering module (8), a digital isolation module (9), a data signal amplification module (10), an external storage module (11), an external clock module (12), an isolation power supply (15), an isolation power supply (16), a voltage output module (18), a current output module (19), a current output module (20), a current output module (21) and a serial communication module (22) mounted on the lower layer circuit board (4).

4. The universal signal converter of claim 3, wherein, The input terminal block (5) is provided with a No. 13 terminal, a No. 14 terminal, a No. 15 terminal, a No. 16 terminal, a No. 17 terminal, a No. 18 terminal, a No. 19 terminal, a No. 20 terminal, a No. 21 terminal, a No. 22 terminal, a No. 23 terminal and a No. 24 terminal; The output terminal block (6) is provided with a No. 1 terminal, a No. 2 terminal, a No. 3 terminal, a No. 4 terminal, a No. 5 terminal, a No. 6 terminal, a No. 7 terminal, a No. 8 terminal, a No. 9 terminal, a No. 10 terminal, a No. 11 terminal and a No. 12 terminal.

5. The universal signal converter of claim 4, wherein, The No. 13 terminal to the No. 22 terminal in the input terminal block (5) are connected with the input end of the metering module (8), and the No. 23 terminal and the No. 24 terminal in the input terminal block (5) are connected with the isolation power supply (15); The isolation power supply (15) is used for supplying power for the microprocessor (7), the metering module (8), the external storage module (11), the external clock module (12), the eight-digit nixie tube (13), the serial communication module (22) and the isolation power supply (16); The isolation power supply (16) is used for supplying power for the digital isolation module (9), the data signal amplification module (10) and the voltage output module (18); The voltage output module (18) is used for supplying power for the current output module (19), the current output module (20) and the current output module (21).

6. The universal signal converter of claim 5, wherein, The signal interface of the microprocessor (7) is connected with the metering module (8), and the microprocessor (7) is also connected with an external storage module (11), an external clock module (12), an eight-digit nixie tube (13), a key module (14), a digital isolation module (9) and a serial communication module (22); The digital isolation module (9) is connected with a voltage output module (18) and a data signal amplification module (10), the voltage output module (18) is connected with a No. 1 terminal and a No. 2 terminal in the output terminal block (6); And the data signal amplification module (10) is connected with a current output module one (19), a current output module two (20) and a current output module three (21), the current output module one (19) is connected with a No. 4 terminal and a No. 5 terminal in the output terminal block (6), the current output module two (20) is connected with a No. 6 terminal and a No. 7 terminal in the output terminal block (6), the current output module three (21) is connected with a No. 8 terminal and a No. 9 terminal in the output terminal block (6), and the serial communication module (22) is connected with a No. 10 terminal, a No. 11 terminal and a No. 12 terminal in the output terminal block (6).

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