Integrated electrician instrument field calibration device

Abstract

The invention provides an integrated field calibration device for an electrical instrument. The device comprises a centralized control terminal shell, a liquid crystal display screen, a keyboard module, a touch panel module, a centralized control terminal front panel, a lock catch assembly, a code scanner, a label printer, a handle, an output port cover assembly, a foot pad, a USB port, a network port, a signal input / output port, a fuse holder, a power port, a ventilation port, a temperature and humidity sensor interface, an HDMI port and an integrated electrical module. The invention provides an integrated field calibration device for an electrical instrument, which solves the problems of low field calibration excitation power, few signal output types and low field calibration efficiency of a process instrument, realizes field calibration, automatic certificate generation and metering identifier printing of the electrical instrument on site, and improves the field calibration efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of instrument measurement and calibration, and in particular relates to an integrated electrician instrument on-site calibration device. Background Art

[0002] With the development of science and technology, intelligent technology has been widely used in industry. As an important part of intelligent instruments, the accuracy and stability of electrical instruments are directly related to the safe operation of the power system. In order to ensure the accuracy and reliability of electrical instruments, electrical instruments must be calibrated regularly according to the national metrology technical specifications to ensure accurate data and uniform values. Electrical instruments involve voltmeters, ammeters, power meters, etc., and a variety of electrical excitation sources are required for the calibration of different instruments. The traditional method of disassembling and transporting instruments from the project site to the laboratory for measurement can no longer meet the needs of industrial production, and on-site calibration has become an urgent need for customers.

[0003] At present, in order to meet customers' needs for on-site calibration, some electrical process instruments have come into being. The positioning of process instruments is mainly focused on portability, light size and weight, but their performance is limited. They can only output low-power electrical excitation sources and output single electrical excitation signals. At the same time, other auxiliary parameter measurements require the configuration of other instruments, such as insulation resistance meters, temperature and humidity sensors, etc., and the integration is not high; at the same time, process instruments can only output excitation signals to compare or calibrate the instruments on site, and the ability to record and process the original data required by the measurement technical specifications is weak. After recording the data, it is necessary to go to the laboratory again for data processing and prepare a calibration certificate report. The calibration of the instrument cannot be completed on site at one time, and the work efficiency is low and not intuitive.

[0004] Therefore, based on the problems arising from the above-mentioned engineering applications, the present invention proposes an integrated on-site calibration device for electrical instruments. Multiple high-power and wide-range electrical excitation sources are integrated in the centralized control terminal. The excitation sources are controlled by the host software of the centralized control terminal, and the data is displayed and recorded in real time. The certificate report can be automatically generated according to the template preset in the software, and the measurement mark can be printed on-site according to the on-site calibration results. All work processes are solved on-site at one time, which greatly improves the on-site work efficiency and has the conditions for engineering promotion. Summary of the invention

[0005] The purpose of the present invention is to provide an integrated electrical instrument field calibration device to solve the problems of small excitation power, few signal output types and low field calibration efficiency during field calibration of process instruments, so as to realize on-site calibration of electrical instruments, automatic generation of certificates and printing of measurement marks, thereby improving the efficiency of field calibration.

[0006] The present invention provides an integrated on-site calibration device for electrical instruments, which includes: a centralized control terminal housing, a liquid crystal display screen, a keyboard module, a touchpad module, a front panel of the centralized control terminal, a latch assembly, a barcode scanner, a label printer, a handle, an output port cover assembly, a foot pad, a USB port, a network port, a signal input / output port, a fuse holder, a power port, a ventilation port, a temperature and humidity sensor interface, an HDMI port, and an integrated electrical module.

[0007] The centralized control terminal housing and the front panel of the centralized control terminal are opened and closed through the latch assembly, opened during work and closed during transportation. The liquid crystal display screen, the keyboard module, and the touchpad module display the upper computer software and input signals.

[0008] A barcode scanner and a label printer are arranged on one side of the centralized control terminal housing. The label printer can print the metering identification of the instrument, and the barcode scanner can scan the printed metering identification to identify the information in the metering identification.

[0009] An output port cover assembly, a USB port, a network port, a signal input / output port, a fuse holder, a power port, a ventilation port, a temperature and humidity sensor interface, and an HDMI port are arranged on the other side of the centralized control terminal housing. The output port cover assembly is opened during work and works by connecting corresponding signals through the USB port, the network port, the signal input / output port, the temperature and humidity sensor interface, and the HDMI port. When not working, the output port cover assembly is closed, and the integrated terminal is a whole, protecting the interfaces and making the appearance simpler. The ventilation port realizes the interaction of internal and external air and cools and dissipates heat from the integrated electrical module.

[0010] A handle is arranged on the integrated on-site calibration device for electrical instruments, and a foot pad is arranged at the bottom. The handle provides convenience during the handling of the on-site calibration device; the foot pad protects the bottom of the on-site calibration device, and at the same time, by adjusting the height of the foot pad, different arrangement angles of the on-site calibration device can be achieved, facilitating the operation and viewing of on-site personnel.

[0011] The integrated electrical module integrates the support module, output module, and measurement module of the on-site calibration device. The support module includes the main board module, display module, power supply module, interface module, and cooling module, providing the underlying hardware support conditions for the entire on-site calibration device; the output module includes DC current, AC current, DC voltage, AC voltage, DC resistance, and square wave output sub-modules. Since the output module is integrated in the centralized control terminal and has sufficient volume and space, the power and range of the output signal can achieve an output of 20A for current and 1000V for voltage. The high power and wide range can achieve a higher coverage rate of on-site calibration of instruments. The output standard signal source is used to calibrate the instrument to be calibrated by the standard source method; the measurement module includes DC current, DC voltage, and DC resistance sub-modules, measuring instruments such as secondary instruments, transmitters, or thermal resistors, and also integrating insulation resistance and temperature and humidity measurement sub-modules, which can measure the insulation resistance of the instrument to be calibrated and the temperature and humidity of the environment. The integrated electrical module 20 integrates all the output and input modules for on-site calibration of electrical instruments, without the need to externally connect other devices, and one device can complete all on-site calibration work.

[0012] The present invention has the following characteristics:

[0013] First, the integrated on-site device for electrical instruments of the present invention integrates an insulation resistance meter and a temperature and humidity measurement module, integrating the equipment required for calibrating electrical instruments, with a high degree of integration;

[0014] Second, the integrated on-site device for electrical instruments of the present invention integrates a barcode scanner and a label printer, which can perform metering identification printing and label information reading on-site, completing the on-site calibration work at one time, and improving the on-site calibration efficiency;

[0015] Third, in the integrated on-site device for electrical instruments of the present invention, the output and measurement modules are integrated in the centralized control terminal, and can output standard signals with high power and wide range, with a high coverage rate of the instrument to be calibrated;

[0016] Finally, the integrated on-site device for electrical instruments of the present invention integrates upper computer software, which can perform program control on the output and measurement modules on-site, automatically collect and record data, and can automatically generate reports according to a preset template, with a high degree of informatization. Description of the Drawings

[0017] Figure 1 Shows a schematic structural diagram of an integrated on-site calibration device for electrical instruments of the present invention;

[0018] Figure 2 Shows a right view of a schematic structural diagram of an integrated on-site calibration device for electrical instruments of the present invention;

[0019] Figure 3Shows a schematic structural diagram when the output port cover assembly of an integrated on-site calibration device for electrical instruments of the present invention is opened;

[0020] Figure 4 Shows the rear view of a schematic structural diagram of an integrated on-site calibration device for electrical instruments of the present invention;

[0021] Figure 5 Shows the framework diagram of the integrated electrical module of an integrated on-site calibration device for electrical instruments of the present invention;

[0022] Among them, the centralized control terminal housing 1, liquid crystal display screen 2, keyboard module 3, touchpad module 4, centralized control terminal front panel 5, latch assembly 6, barcode scanner 7, label printer 8, handle 9, output port cover assembly 10, foot pads 11, USB port 12, network port 13, signal input / output port 14, fuse base 15, power port 16, ventilation port 17, temperature and humidity sensor interface 18, HDMI port 19, integrated electrical module 20. Specific embodiments

[0023] The present invention provides an integrated on-site calibration device for electrical instruments, as Figures 1 to 5 shown, the device includes: centralized control terminal housing 1, liquid crystal display screen 2, keyboard module 3, touchpad module 4, centralized control terminal front panel 5, latch assembly 6, barcode scanner 7, label printer 8, handle 9, output port cover assembly 10, foot pads 11, USB port 12, network port 13, signal input / output port 14, fuse base 15, power port 16, ventilation port 17, temperature and humidity sensor interface 18, HDMI port 19, integrated electrical module 20.

[0024] The following further describes in detail the assembly relationship and functions of each part of an integrated on-site calibration device for electrical instruments of the present invention with reference to the accompanying drawings:

[0025] Combined with the attached Figure 1 :

[0026] The liquid crystal display screen 2 is embedded in the centralized control terminal housing 1, and the keyboard module 3 and touchpad module 4 are embedded and installed on the centralized control terminal front panel 5. The centralized control terminal front panel 5 and the centralized control terminal housing 1 can be opened and closed through the latch assembly 6. The liquid crystal display screen 2 displays the upper computer software, and the keyboard module 3 and touchpad module 4 input signals. The centralized control terminal housing 1 adopts a plate-type assembled structure and is fixed by screws, which is convenient for assembly and maintenance.

[0027] The barcode scanner 7 and label printer 8 are installed on one side of the centralized control terminal. The barcode scanner 7 is above the label printer, which is convenient for scanning the label to obtain relevant information.

[0028] Combined with the attached Figure 2 、Figure 3 :

[0029] On the other side of the centralized control terminal, a USB port 12, a network port 13, a signal input / output port 14, a fuse base 15, a power port 16, a ventilation port 17, a temperature and humidity sensor interface 18, an HDMI port 19, and an output port cover assembly 10 are installed. This side mainly serves as the power input interface for the on-site calibration device and the electrical information input / output interface, and is mainly connected to external devices or instruments through cables.

[0030] The output port cover assembly 10 can protect the USB port 12, the network port 13, the signal input / output port 14, the temperature and humidity sensor interface 18, and the HDMI port 19. When external connection is not required, the output port cover assembly 10 is fixed to the centralized control terminal housing 1 with screws; when external connection is needed, the output port cover assembly 10 is opened, and each interface is connected to the corresponding cable.

[0031] A handle 9 is installed above the centralized control terminal housing 1 for easy handling.

[0032] Four feet 11 are fixed under the centralized control terminal housing 1, and the height of the feet 11 can be adjusted independently. By adjusting the height of the feet 11, the on-site calibration device is fixed at different angles, facilitating on-site personnel to operate and observe.

[0033] Combined with the attached Figure 4 、 Figure 5 :

[0034] The integrated electrical module 20 is installed in the centralized control terminal housing 1 with screws. The integrated electrical module 20 integrates the support module, output module, and measurement module of the on-site calibration device.

[0035] Among them, the support module includes a main board module, a display module, a power module, an interface module, and a cooling module, providing underlying hardware support conditions for the entire on-site calibration device;

[0036] The output module includes DC current, AC current, DC voltage, AC voltage, DC resistance, and square wave output sub-modules. Since the output module is integrated in the centralized control terminal and has sufficient volume and space, the power and range of the output signal can achieve an output of 20 A for current and 1000 V for voltage. High power and wide range can achieve a higher coverage rate of on-site calibration of instruments, and an output standard signal source is used to calibrate the instrument to be calibrated by the standard source method;

[0037] The measurement module includes DC current, DC voltage, and DC resistance sub-modules, which measure instruments such as secondary instruments, transmitters, or thermal resistors. At the same time, it also integrates insulation resistance and temperature and humidity measurement sub-modules, which can measure the insulation resistance of the instrument to be calibrated and the temperature and humidity of the environment.

[0038] The integrated electrical module 20 integrates all output and input modules for on-site calibration of electrical instruments. Without connecting other external devices, one device can complete all on-site calibration work.

[0039] The installation steps of each component of an integrated on-site calibration device for electrical instruments according to the present invention are as follows:

[0040] a) Embed the liquid crystal display screen 2 in the central control terminal housing 1;

[0041] b) Embed and install the keyboard module 3 and the touchpad module 4 on the front panel 5 of the central control terminal. The latch assembly 6 is fixed on the front panel 5 of the central control terminal and the central control terminal housing 1, and the connection can be opened and closed through the latch assembly 6;

[0042] c) The barcode scanner 7 and the label printer 8 are arranged on one side of the central control terminal. The barcode scanner 7 is above the label printer, which is convenient for scanning barcodes of labels to obtain relevant information, and the label printer 8 can print the measurement identification of the instrument;

[0043] d) Fix the USB port 12, network port 13, signal input / output port 14, fuse holder 15, power port 16, ventilation port 17, temperature and humidity sensor interface 18, HDMI port 19 and output port cover assembly 10 on one side of the central control terminal. The output port cover assembly 10 can be fixed and opened with the central control terminal housing 1 by screws to protect the interfaces when not in use. The signal input / output port 14 includes a standard electrical signal output interface, an external electrical signal input interface, an insulation resistance measurement interface, a temperature and humidity sensor interface, and communication interfaces for the network and USB.

[0044] e) The integrated electrical module 20 is installed in the central control terminal housing 1 by screws. The integrated electrical module 20 integrates the support module, output module, and measurement module of the on-site calibration device. The support module includes a main board module, a display module, a power module, an interface module, and a cooling module, providing underlying hardware support conditions for the entire on-site calibration device; the output module includes sub-modules for direct current, alternating current, direct voltage, alternating voltage, direct resistance, and square wave output.

[0045] The usage method of an integrated on-site calibration device for electrical instruments according to the present invention is as follows:

[0046] (1) Adjust the height of the foot pads 11 to achieve the layout angle of the on-site calibration device;

[0047] (2) Open the central control terminal housing 1 and the front panel 5 of the central control terminal through the latch assembly 6 to expand the central control terminal;

[0048] (3) Open the output cover assembly 10 and work by connecting corresponding signals through the USB port 12, network port 13, signal input / output port 14, temperature and humidity sensor interface 18, and HDMI port 19. Connect to external devices or instruments through cables. The cables connected to each interface provide a power input interface and an electrical information input / output interface for the integrated electrical instrument on-site calibration device;

[0049] (4) The liquid crystal display 2, keyboard module 3, and touchpad module 4 display and input signals to the host computer software;

[0050] (5) When calibrating an analog pointer meter or digital multimeter on-site using the standard source method, the signal input / output port 14 outputs a standard signal source through the host computer software, reads the value of the instrument to be calibrated, and calibrates the indication error and rising and falling variation calibration items; When calibrating a secondary instrument on-site, the signal input / output port 14 receives the signal input by the instrument to be calibrated and displays it on the host computer software, calculates the difference between the actual display value and the theoretical value, and calibrates the indication calibration item;

[0051] (6) Since the output module is integrated in the centralized control terminal and has sufficient volume and space, the power and range of the output signal can achieve an output of 20 A for current and 1000 V for voltage. The high power and wide range can achieve a higher coverage rate of on-site calibration of instruments. Output a standard signal source to calibrate the instrument to be calibrated using the standard source method;

[0052] (7) The measurement module includes DC current, DC voltage, and DC resistance sub-modules, and measures instruments such as secondary instruments, transmitters, or thermal resistors;

[0053] (8) The integrated electrical module 20 insulation resistance measurement module measures the insulation resistance value of the instrument to be calibrated; The temperature and humidity measurement module measures the temperature and humidity values of the on-site environment;

[0054] (9) The integrated electrical module 20 integrates all output and input modules for on-site calibration of electrical instruments. There is no need to connect other external devices. One device can complete all on-site calibration work. The metering label of the instrument can be printed through the label printer 8;

[0055] (10) The barcode scanner 7 can scan the printed metering label and identify the information in the metering label.

[0056] The advantages of the present invention are as follows: it integrates an insulation resistance meter and a temperature and humidity measurement module, integrating the equipment required for calibrating electrical instruments, with a high degree of integration; it integrates a barcode scanner and a label printer, enabling on-site printing of measurement identifications and reading of label information, completing on-site calibration work at one time, reducing the workflow of separately filling in measurement standards required for traditional calibration, and improving on-site calibration efficiency; the output and measurement modules are integrated in the centralized control terminal, capable of outputting standard signals with high power and wide range, and having a high coverage rate for the instruments to be calibrated; it integrates a host computer software, enabling on-site programming control of the output and measurement modules, automatically collecting and recording data, and automatically generating reports according to preset templates, with a high degree of informatization.

Claims

1. An integrated electrical instrument field calibration device, characterized in that: The device includes: a centralized control terminal housing 1, a liquid crystal display screen 2, a keyboard module 3, a touch panel module 4, a centralized control terminal front panel 5, a lock assembly 6, a barcode scanner 7, a label printer 8, a handle 9, an output port cover assembly 10, a foot pad 11, a USB port 12, a network port 13, a signal input and output port 14, a fuse seat 15, a power port 16, a vent 17, a temperature and humidity sensor interface 18, an HDMI port 19, and an integrated electrical module 20; The liquid crystal display screen 2 is embedded in the centralized control terminal housing 1, the keyboard module 3 and the touch panel module 4 are embedded in the centralized control terminal front panel 5, and the centralized control terminal front panel 5 and the centralized control terminal housing 1 can be opened and closed through the locking component 6; The LCD screen 2 displays the upper computer software, the keyboard module 3 and the touch panel module 4 input signals, and the housing 1 of the centralized control terminal adopts a plate-type assembly structure and is fixed by screws, which is convenient for assembly and maintenance; The integrated barcode scanner 7 and label printer 8 can print metrological marks and read label information on site, completing the on-site calibration work at one time, thus improving the efficiency of on-site calibration.

2. The integrated electrical instrument field calibration device according to claim 1, characterized in that: The integrated electrical module 20 integrates the support module, output module, and measurement module of the field calibration device; The support modules include mainboard module, display module, power module, interface module and cooling module, which provide the underlying hardware support conditions for the entire on-site calibration device; The output module includes DC current, AC current, DC voltage, AC voltage, DC resistance, and square wave output submodules. Since the output module is integrated in the centralized control terminal and has sufficient volume and space, the power and range of the output signal can achieve an output of 20A current and 1000V voltage. The high power and wide range can achieve a higher coverage of instrument field calibration, and the output standard signal source can perform standard source method calibration on the calibrated instrument. The measurement module includes DC current, DC voltage, and DC group sub-modules to measure secondary instruments, transmitters, thermal resistors and other instruments. It also integrates insulation resistance and temperature and humidity measurement sub-modules to measure the insulation resistance of the calibrated instrument and the temperature and humidity of the environment.

3. The integrated electrical instrument field calibration device according to claim 1, characterized in that: The installation steps are as follows: a) Embedding the liquid crystal display screen 2 in the housing 1 of the centralized control terminal; b) The keyboard module 3 and the touchpad module 4 are embedded in the front panel 5 of the centralized control terminal, and the locking component 6 is fixed on the front panel 5 of the centralized control terminal and the housing 1 of the centralized control terminal, and the connection can be opened and closed through the locking component 6; c) The barcode scanner 7 and the label printer 8 are on one side of the centralized control terminal, and the barcode scanner 7 is above the label printer, so as to facilitate scanning the label to obtain relevant information, and the label printer 8 can print the metering mark of the instrument; d) The USB port 12, the network port 13, the signal input and output port 14, the fuse holder 15, the power port 16, the ventilation port 17, the temperature and humidity sensor interface 18, the HDMI port 19 and the output port cover assembly 10 are fixed to one side of the centralized control terminal. The output port cover assembly 10 can be fixed and opened with screws to the centralized control terminal housing 1 to protect the interface when not in use; the signal input and output port 14 includes a standard electrical signal output interface, an external electrical signal input interface, an insulation resistance measurement interface, a temperature and humidity sensor interface, and a network and USB communication interface; e) The integrated electrical module 20 is installed in the centralized control terminal housing 1 by means of screws.

4. The integrated electrical instrument field calibration device according to claim 1, characterized in that: The handle 9 is installed above the centralized control terminal housing 1 for easy carrying; four foot pads 11 are fixed below the centralized control terminal housing 1, and the heights of the foot pads 11 can be adjusted independently. By adjusting the heights of the foot pads 11, the on-site calibration device can be fixed at different angles, which is convenient for on-site personnel to operate and watch.

5. The integrated electrical instrument field calibration device according to claim 1, characterized in that: Here’s how to use it: (1) The arrangement angle of the on-site calibration device is achieved by adjusting the height of the foot pad 11; (2) Opening the centralized control terminal housing 1 and the centralized control terminal front panel 5 through the locking assembly 6 to realize the deployment of the centralized control terminal; (3) Open the output port cover assembly 10, connect the corresponding signals through the USB port 12, the network port 13, the signal input and output port 14, the temperature and humidity sensor interface 18, and the HDMI port 19 interface to work, and connect with external devices or instruments through cables. The corresponding cables connected to each interface provide a power input interface and an electrical information input and output interface for the integrated electrical instrument field calibration device; (4) LCD screen 2, keyboard module 3, and touchpad module 4 are used to display and input signals to the host computer software; (5) When the standard source method is used for on-site calibration to calibrate an analog pointer meter or a digital multimeter, the signal input and output port 14 outputs a standard signal source through the host computer software, reads the value of the calibrated instrument, and calibrates the indication error and rise and fall variation calibration items; When calibrating the secondary instrument on site, the signal input and output port 14 receives the signal input by the calibrated instrument and displays it in the upper computer software, calculates the difference between the actual displayed value and the theoretical value, and calibrates the indication calibration item; (6) Since the output module is integrated in the centralized control terminal, there is enough volume and space, so the power and range of the output signal can achieve an output of 20A current and 1000V voltage. The high power and wide range can achieve a higher coverage of instrument field calibration, and the output standard signal source can perform standard source method calibration on the instrument to be calibrated; (7) The measurement module includes DC current, DC voltage, and DC group submodules to measure secondary instruments, transmitters, or thermal resistors; (8) The insulation resistance measurement module of the integrated electrical module 20 measures the insulation resistance value of the calibrated instrument; the temperature and humidity measurement module measures the temperature and humidity values ​​of the on-site environment; (9) The integrated electrical module 20 integrates all the output and input modules for on-site calibration of electrical instruments. No external equipment is required. One device can complete all on-site calibration work. The meter identification of the instrument can be printed through the label printer 8. (10) The barcode scanner 7 can scan the printed measurement mark to identify the information in the measurement mark.

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