CN109253837B - Pressure calibration device and processing method of pressure instrument calibration information - Google Patents
Pressure calibration device and processing method of pressure instrument calibration information Download PDFInfo
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
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Abstract
The invention provides a pressure calibration device and a processing method of calibration information of a pressure instrument, belonging to the field of metering and calibrating of the pressure instrument, wherein the device comprises a pressure calibration unit, a main control unit and a communication module, wherein the main control unit is respectively and electrically connected with the pressure calibration unit and the communication module; the device is also provided with a camera assembly electrically connected to the master control unit. The invention can establish connection between the communication module and the remote database, can realize the processing of the calibration information of the calibrated pressure instrument on the industrial site, and is suitable for calibrating the calibrated pressure instrument on the industrial site.
Description
Technical Field
The invention belongs to the field of metering and calibrating of pressure instruments and meters, and relates to a pressure calibrating device capable of remotely communicating with a database in real time and a pressure instrument calibration information processing method.
Background
Pressure instruments used in the fields of industrial production, pressure measurement and the like need to be regularly checked so as to ensure the accuracy of pressure detection of the pressure instruments and ensure that pressure equipment is used in a safety range. For the pressure meters existing in large quantities in the industrial field, a field pressure calibration device is needed to calibrate the pressure meters. For different types of pressure meters, different calibration schemes are used.
More advanced calibration methods for existing pressure meters typically involve first carrying the calibration device to a laboratory and connecting it to a computer in the laboratory, and downloading the required information from a database via the computer, including the calibration protocol, historical calibration data, and other attributes of the pressure meter being calibrated. Or the operator can record the required information in a paper pen for a laboratory and carry the information to an industrial field; after the pressure gauge reaches the industrial field where the pressure gauge is located, the pressure gauge is calibrated, the acquired calibration data and other data are stored in a calibration device or recorded on paper, and then the pressure gauge returns to a laboratory and is uploaded to a database through a computer.
The above method requires a back and forth wave between the laboratory and the industrial site, which does not allow for calibration and real-time data upload to the calibrated pressure gauge at the industrial site. The method of recording data using a pen and paper also involves problems with data reliability.
In addition, a solution for connecting the pressure calibration device to the database through communication media such as a mobile phone is available at present, and the solution requires that networks are respectively configured on the mobile phone and the pressure calibration device for connection setting, which is often complicated and complicated, and in some industrial fields, general technicians cannot complete operations.
Therefore, it is necessary to provide a pressure calibration device and a method for processing calibration information of a pressure meter, which can be connected to a database in real time, and implement real-time downloading of historical calibration data and calibration schemes of a calibrated pressure meter and real-time uploading of the current calibration data in an industrial field.
Disclosure of Invention
The invention aims to solve the problems and provides a pressure calibration device which is simple to operate, convenient to use and capable of communicating with a remote database in real time, and the device can calibrate a calibrated pressure instrument in an industrial field and perform real-time information interaction with the remote database.
The above object of the invention is achieved by the following solutions:
the pressure calibration device is used for calibrating a field calibrated pressure instrument (100), and comprises a pressure calibration unit (1), a main control unit (2) and a communication module (3), wherein the main control unit (2) and the communication module (3) are electrically connected with the pressure calibration unit (1), the pressure calibration unit (1) is externally connected with the calibrated pressure instrument (100), and the communication module (3) is connected into a remote database (300) through a network (200).
In the pressure calibration device, the communication module (3) is a communication program integrated in the main control unit (2), the main control unit (2) is provided with a network interface, and the communication module (3) is accessed to the remote database (300) through the network (200) via the network interface.
In the pressure calibration device, the communication module (3) is a hardware unit with a connection plug and a network interface, the communication module (3) is mechanically and electrically connected with the main control unit (2) through the connection plug, and is connected to the network (200) and the remote database (300) through the network interface.
The pressure calibration device further comprises a camera assembly electrically connected to the main control unit (2), the camera assembly comprises a camera (4), a camera (5) arranged on the camera (4) and an image recognition program implanted into the main control unit (2), the camera (5) is right opposite to the front appearance of the calibrated pressure instrument (100), a shot picture is transmitted to the main control unit (2) through the camera (4), and the image recognition program performs image recognition on the shot picture to acquire the model of the calibrated pressure instrument and basic information of the calibrated pressure instrument.
The pressure calibration device further comprises a power supply (9) and/or a display screen (10) which are electrically connected to the main control unit (2), wherein the power supply (9) is a replaceable battery pack or a rechargeable battery pack or an external power supply; the display screen (10) is a touch screen or an LED display.
In the pressure calibration device, the pressure calibration unit (1) comprises a pressure generation unit (13), a pressure control module (11), a pressure measurement module (12) and a pressure interface module (14) which are communicated through a gas pipeline, and the pressure measurement module (12) and the pressure control module (11) are respectively and electrically connected to the main control unit (2); the pressure interface unit (14) is externally connected with a pressure instrument (100) to be calibrated, the pressure measuring module (12) provides pressure standard data, and high-pressure gas generated by the pressure generating unit (13) enters the pressure control module (11) through a gas pipeline and reaches the pressure instrument (100) to be calibrated through the pressure interface module (14).
The pressure calibration device further comprises a temperature calibration unit (6) and an electrical signal calibration unit which are electrically connected to the main control unit (2), wherein the electrical signal calibration unit comprises a current calibration unit (7) and/or a voltage calibration unit (8).
The invention also provides a processing method of the calibration information of the pressure instrument, which adopts the pressure calibration device to operate, realizes the real-time information interaction between the calibrated pressure instrument and the remote database in the industrial field, and comprises the following steps:
information acquisition: the pressure calibration method comprises the steps that a pressure calibration unit (1) is connected with a pressure instrument (100) to be calibrated, a communication module (3) is connected into a network (200) and is connected with a database (300), and calibration information corresponding to the type of the pressure instrument (100) to be calibrated in the database (300) is obtained in real time and comprises basic information of the pressure instrument to be calibrated, historical calibration data and a calibration scheme;
calibration and data transmission: the main control unit (2) generates the current calibration data of the calibrated pressure instrument (100) according to the obtained calibration scheme, and the main control unit (2) uploads the current calibration data to the database (300) in real time through the communication module (3).
In the information acquisition step of the processing method of the pressure instrument calibration information, the model information of the pressure instrument (100) to be calibrated is transmitted into the main control unit (2) of the pressure calibration device, and the main control unit (2) transmits the model information of the pressure instrument (100) to be calibrated to the communication module (3).
In the above method for processing calibration information of a pressure meter, the model information of the pressure meter (100) to be calibrated is input through the display screen (10) as set forth in claim 5 or loaded through a configuration file, or is obtained by taking a picture through the camera (4) as set forth in claim 4 and recognizing the taken picture through an image recognition program in the main control unit (2).
In the processing method of the calibration information of the pressure instrument, the historical calibration data includes pressure indication values and pressure indication errors of all pressure calibration points of the calibrated pressure instrument or pressure indication values, pressure indication errors, current values and current indication errors of all pressure calibration points; the calibration scheme includes an automatic calibration procedure that performs a calibration operation; the basic information of the pressure meter to be calibrated comprises the measuring range, the precision, the number and the manufacturing plant information of the pressure meter to be calibrated.
Due to the adoption of the design, the invention has the following characteristics: the device integrates the communication module into the device, can establish connection with the remote database through simple setting, saves intermediate communication media and a complicated network connection setting process, and can realize the processing of the calibration information of the calibrated pressure instrument on an industrial field, namely downloading the historical calibration information from the remote database in real time and uploading the generated calibration data to the remote database in real time; the pressure instrument can be evaluated for long-term stability by comparing with historical calibration data; the camera component is adopted to automatically identify the basic information such as the model of the pressure instrument to be calibrated, the preset step is omitted, and the operation efficiency is improved.
Drawings
FIG. 1 is a block diagram of the pressure calibration device of the present invention;
FIG. 2 is a block diagram of a first embodiment of a pressure calibration device according to the present invention;
fig. 3 is a block diagram of a second embodiment of the pressure calibration apparatus of the present invention.
The main labels are as follows:
1: a pressure calibration unit;
11: pressure control module, 111: intake valve, 112: buffer, 113: micro-pressure adjustment mechanism, 114: a pressure regulation drive circuit;
12: pressure measurement module, 121: valve switching circuit, 122, 123: solenoid valve, 124, 125: pressure module, 126: pressure joint, 127: a standard table;
13: pressure generation module, 131: motor, 132: a pump body;
14: pressure interface module, 141: standard pressure input, 142: pressure joint, 144: exhaust valve, 145: a muffler;
2: master control unit, 21: control chip, 21-1: a main control circuit board; 22: pressure module switching element, 22-1: an interface circuit board; 23: digital communication interface, 24: display interface, 25: keyboard interface, 27: a keyboard;
29: an electrical signal detection circuit;
3: a communication module;
4: a camera; 5: a camera;
6: a temperature calibration unit; 7: a current calibration unit; 8: a voltage calibration unit; 87: an external electrical measurement interface;
9: a power source; 10: a display screen;
100: a calibrated pressure meter; 200: a network; 300: a database.
Detailed Description
The pressure calibration device and the processing method of the calibration information of the pressure meter according to the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Device for measuring the position of a moving object
The existing pressure calibration device generally adopts an off-line mode to detect or calibrate a pressure instrument on site, and the obtained data information cannot be uploaded to a database in real time, or although the data information is uploaded to the database through communication media such as a mobile phone and the like, network configuration and connection setting are complicated, and general operators cannot complete the operation; the pressure calibration device provided by the invention adopts a modular design, integrates a remote communication function, is simple in connection and configuration with a database, can realize calibration and download of basic information (including information such as range, precision, serial number and manufacturing factory of the pressure instrument to be calibrated), historical calibration data, calibration scheme and real-time uploading generated calibration data of the pressure instrument to be calibrated in an industrial field, and is more convenient, rapid and intelligent.
As shown in fig. 1, the pressure calibration device of the present invention includes a pressure calibration unit 1, a main control unit 2 and a communication module 3, the main control unit 2 is electrically connected to the pressure calibration unit 1 and the communication module 3, the pressure calibration unit 1 is externally connected to a calibrated pressure instrument 100, the communication module 3 is connected to a database 300 through a network 200, the main control unit 2 sends a control command to the pressure calibration unit 1 and the communication module 3 to control the actions of each component in the pressure calibration unit 1 and the communication module 3, receives the working state information of each component, and implements the safe and orderly operation of the pressure calibration device.
The pressure calibration unit 1 includes a pressure generation unit 13, a pressure control module 11, a pressure measurement module 12, and a pressure interface module 14, which are communicated with each other through a gas pipeline, and the pressure measurement module 12 and the pressure control module 11 are respectively electrically connected to the main control unit 2 (in fig. 1, a thick line indicates gas circuit connection, and a thin line indicates electrical connection). The pressure interface unit 14 is externally connected to the pressure instrument 100 to be calibrated, the pressure measurement module 12 provides pressure standard data, the high-pressure gas generated by the pressure generation unit 13 enters the pressure control module 11 through a gas pipeline, reaches the pressure instrument 100 to be calibrated through the pressure interface module 14, and is calibrated under the control of the main control unit 2 according to the pressure standard data of the pressure measurement module 12.
The pressure calibration device also comprises a temperature calibration unit 6 and an electric signal calibration unit which are electrically connected to the main control unit 2, wherein the electric signal calibration unit comprises a current calibration unit 7 and a voltage calibration unit 8, and the temperature calibration unit 6, the current calibration unit 7 and the voltage calibration unit 8 can be externally connected with a calibrated instrument to realize the calibration of the output electric signal of the calibrated instrument.
The temperature calibration unit 6 mainly includes a high-accuracy current/voltage signal detection unit and a temperature/electric signal conversion unit. The output end of the calibrated instrument outputs corresponding current/voltage signals corresponding to different temperatures, the signals are connected to the current/voltage signal detection unit through an electrical interface (an analog current/voltage input interface or a digital current/voltage signal input interface) to carry out measurement comparison (comparison with standard temperature and current/voltage signal values) and temperature conversion, and therefore calibration of the calibrated temperature instrument is achieved.
The current calibration unit 7 mainly includes a high-accuracy current signal detection unit. The output end of the calibrated instrument outputs corresponding current signals corresponding to different current display values, and the signals are connected to the current signal detection unit through an electrical interface (an analog current input interface or a digital current signal input interface) to be measured and compared (compared with a standard current value), so that the calibration of the output current signals of the calibrated instrument is realized.
The voltage calibration unit 8 mainly includes a high-accuracy voltage signal detection unit, the calibrated instrument outputs corresponding voltage signals corresponding to different voltage display values, and the signals are accessed to the voltage signal detection unit through an electrical interface (an analog voltage input interface or a digital voltage signal input interface) to perform measurement comparison (comparison with a standard voltage value), so that the calibration of the output voltage signals of the calibrated instrument is realized.
The main control unit 2 includes a main control chip and peripheral circuits thereof, a corresponding control algorithm is usually implanted in the main control chip, the main control unit 2 is electrically connected with the pressure generation unit 13, the pressure control module 11, the pressure measurement module 12 and the pressure interface module 14 of the pressure calibration unit 1, respectively, and sends control commands to the modules to control the actions of the modules and receives state information of the modules. The main control unit 2 is also electrically connected with a power supply 9 and a display screen 10, the power supply 9 can be a replaceable battery pack or a rechargeable battery pack, and can also be an external power supply for supplying power to other units of the device; the display screen 10 may be a touch screen or an LED display for setting or inputting operating parameters, displaying data results and/or data curves.
The communication module 3 completes data interaction between the main control unit 2 and the remote database 300, and has a remote communication function. In an implementation form, the communication module may be a communication program integrated in the main control unit 2, the main control unit 2 is provided with a network interface to access the network 200, and may also be an independent hardware module, for example, the communication module 3 has a connection plug and a network interface, the connection plug is used for coupling with the main control unit 2 to implement mechanical connection and electrical connection between the communication module 3 and the main control unit 2, the network interface is connected to the network 200 and accesses the database 300 through the network 200, where the network 200 is an Internet-based industrial ethernet network, and may also be another wireless network supporting Internet connection, and may implement a remote communication function.
The device also comprises a camera component electrically connected to the main control unit 2, wherein the camera component comprises a camera 4, a camera 5 arranged on the camera 4 and an image recognition program implanted into the main control unit 2, the camera is opposite to the front appearance of the pressure meter 100 to be calibrated, data displayed on a dial plate of the pressure meter 100 to be calibrated, model information (including unique identity information (ID code) of the pressure meter 100 to be calibrated) and appearance characteristics thereof can be shot, the shot picture is transmitted to the main control unit 2 through the camera 4, and the image recognition program implanted into the main control unit 2 in advance carries out image recognition on the shot picture, so that the model of the pressure meter to be calibrated and basic information of the pressure meter to be calibrated, such as the range, precision, serial number, manufacturing plant and the like of the pressure meter to be calibrated are obtained.
In the device of the present invention, the communication module 3 is integrated inside the device, so that the device has a remote communication function, an intermediate communication medium is omitted, the device can be connected to the remote database 300 by a simple setup by accessing the device to a network supported by the device, pre-stored basic information of the pressure meter under calibration (including information on the range, accuracy, number, and manufacturer of the pressure meter under calibration), historical calibration data of the pressure meter under calibration 100 (including pressure indication values of all pressure calibration points, pressure indication error, or pressure indication values of all pressure calibration points, pressure indication error, current value, current indication error, etc.), and calibration schemes (including an automatic calibration program for performing calibration operations) can be downloaded from the database in real time, therefore, the calibration data of the pressure instrument 100 to be calibrated can be automatically generated, and the calibration data can be uploaded to the database in real time through the network 200.
The combination of the pressure calibration unit 1 and the main control unit 2 forms a standard pressure calibration device, the standard pressure calibration device has different implementation forms, and the purpose of pressure calibration can be achieved, the device of the present invention forms a more intelligent and more convenient pressure calibration device by integrating the communication module 3 or the communication module 3 and the camera component into the standard pressure calibration device, and the implementation process of the present invention is described in the following two embodiments, but is not limited to the following embodiments.
The first embodiment is as follows:
in the embodiment shown in fig. 2, the pressure generating unit 13 generates the gas pressure by a gas pressure pump, and the gas pressure pump is directly communicated with the atmosphere and generates the gas pressure by compressing air without an external gas cylinder. In theory, any air pump capable of generating air pressure by compressing air can be used in the present invention, and in the present invention, a gas pressurizing pump, i.e., a high-pressure bidirectional micro electric air pump (micro pressure pump) which has been developed by the applicant itself, has functional characteristics of automatic pressurization, high pressurizing pressure and high-efficiency pressurization, and employs a high-pressure check valve technology is preferably used. In the first embodiment shown in fig. 2, the pressure generating unit 13 comprises a pump body 132 and a motor 131 for driving the pump body 132 to operate, the pump body 132 is driven by the motor 131 to repeat the suction process and the exhaust process, the gas is compressed continuously to generate high-pressure gas, and the specific structure and the operation principle thereof are described in the patent with the applicant's publication number CN 102252805B.
The pressure control module 11 controls the gas pressure, and the gas path part of the pressure control module 11 includes a gas inlet valve 111, a buffer 112 and a micro-pressure adjusting mechanism 113 which are in gas path communication (indicated by thick lines in fig. 2), the gas inlet valve 111 is communicated with the gas output pipeline of the pump body 132 in the pressure generating unit 13 to serve as the pressure input end of the pressure control module 11, the micro-pressure adjusting mechanism 113 is in gas path communication with the pressure interface module 114, and the buffer 112 is a pressure container with a fixed shape and is mainly used for filtering the fluctuation of the gas flow entering from the gas inlet valve 111 and stabilizing and storing the gas pressure; the gas passing through the buffer 112 enters the micro-pressure adjusting mechanism 113 for achieving accurate control and adjustment of the pressure. The control part of the pressure control module 11 includes a pressure regulation driving circuit 114, the pressure regulation driving circuit 114 is electrically connected to the power supply 9, the air inlet valve 111, the micro-pressure regulating mechanism 113, the air outlet valve 144 of the pressure interface module 14 and the main control chip 21 of the main control unit 2 respectively (indicated by thin lines in fig. 2), the control function of the pressure regulation driving circuit 114 is completed by the driving of the main control chip 21 of the main control unit 2, and the control circuit mainly implements electric control on the on-off state of the air inlet valve 111 and the air outlet valve 144 to realize pressure regulation of air inflow or air discharge and fine-tuning control of output pressure by controlling the micro-pressure regulating mechanism 113. In addition, when the pressure generating unit 13 used in fig. 2 is used, the pressure regulation driving circuit 114 is also electrically connected to the motor 131 to control the orderly operation thereof.
The pressure interface module 14 includes a vent valve 144 and a standard pressure input 141, the standard pressure input 141 is in air-path communication with the micro-pressure adjusting mechanism 113 of the pressure control module 11 and is externally connected to the calibrated pressure meter 100 through a pressure connector 142, and the vent valve 144 is in communication with the atmosphere through a silencer 145.
The pressure measurement module 12 comprises a pressure joint 126 in air-path communication with a standard pressure input end 141 of the pressure interface module 14, the pressure joint and the pressure joint 142 are connected to the standard pressure input end 141 in parallel and are used for connecting a pressure standard, when the pressure standard is a standard meter 127, the standard meter 127 is directly connected to the pressure joint 126, and the standard meter 126 with different measuring ranges is replaced manually to calibrate the detected pressure meter 100 with the corresponding measuring range; when the pressure standard is a pressure module (pressure sensor), the pressure connector 126 is respectively connected to the pressure modules 124 or 125 through a plurality of solenoid valves 122 or 123, and switches the pressure modules 124 or 125 with different ranges through a valve switching circuit 121, wherein each pressure module is connected to the pressure connector 126 through a corresponding solenoid valve, and each solenoid valve is electrically connected to the valve switching circuit 121.
The main control unit 2 comprises a control chip 21, and a display interface 24, a keyboard interface 25 and a data communication interface 23 which are connected to the control chip 21, wherein a control algorithm (such as a well-known special adaptive PID pressure control algorithm and a voltage and current related algorithm) is implanted in the control chip 21, and the control algorithm is the brain of the whole device and is used for sending out a control command; the data communication interface 23 is electrically connected to the main control chip 21, and when the pressure standard of the pressure measurement module 12 uses the standard meter 127, the data communication interface 23 may be directly connected to the standard meter 127 to receive the pressure value of the standard meter 127 and transmit the pressure value to the main control chip 21; when the pressure standard is a plurality of pressure modules (with different ranges), the digital communication interface 23 transmits the pressure value of the positioned pressure module 124 or 125 to the control chip 21 through the digital communication interface 23 by a pressure module switching element 22 (such as a positioner), the pressure control algorithm calculates the control quantity according to the difference by comparing the pressure value with the preset pressure value in the control chip 21, and transmits the calculated control quantity to the pressure regulation driving circuit 114, and the pressure regulation driving circuit 114 controls the air inlet valve 111, the air outlet valve 144 and the micro-pressure adjusting mechanism 113 to implement the feedback control of accurate pressure generation; the control chip 21 is externally connected with a keyboard 27 through a keyboard interface 25, is externally connected with a display 26 through a display interface 24, inputs set pressure and program control operation data parameters through the keyboard 27, and displays a pressure control result and a curve through a standard table 127 or a display screen 26.
The control chip 21 of the main control unit 2 is also connected with an electric signal detection circuit 29, and when the calibrated pressure instrument 100 is calibrated, the electric signal detection and calibration can be carried out, so that the integrated calibration of pressure and electric signals can be implemented; and the electric signal detection and calibration can be carried out on other current and voltage meters. When the electrical signal of the calibrated instrument is connected to the electrical signal detection circuit 29, the electrical signal is converted into a digital signal and is input to the control chip 21 connected with the electrical signal detection circuit, and the digital signal is calculated in the control chip 21 through a calculation formula preset in the control chip 21 to obtain detected electrical signal data or on-off state information of the pressure switch, and the detected electrical signal data or the on-off state information of the pressure switch is displayed through the display screen 10. At this time, the detected value of the electrical signal can be used as the displayed value of the electrical signal output by the calibrated meter, or as the calibrated value of the output signal of the calibrated pressure meter 100, for judging the accuracy of the difference between the output electrical signal value of the calibrated meter and the standard value, or for judging whether the output electrical signal value of the calibrated pressure meter 100 is consistent with the specified value. The electrical signal calibration data will be temporarily stored in the memory of the control chip 21 and can be uploaded to the database 300 through the communication module 3.
The communication module 3 or the communication module 3 and the camera assembly are directly electrically connected to the control chip 21 of the main control unit 2, and directly perform data interaction with the control chip 21. The communication module 3 supports an industrial ethernet communication protocol and a wireless network protocol, and can access the Internet network.
Example two:
in the second embodiment shown in fig. 3, the main control unit 2 includes a main control circuit board 21-1 and an interface circuit board 22-1, where the interface circuit board 22-1 is a circuit integrated board of an air path component of the pressure calibration unit 1, the pressure control module 11, the pressure interface module 14, and the pressure measurement module 12 of the pressure calibration unit 1 are all connected to the interface circuit board 22-1, the interface circuit board 22-1 is connected to the main control circuit board 21-1 through an interface circuit board plug mounted thereon, and the main control circuit board 21-1 intelligently controls an air path through the interface circuit board 22-1. The main control circuit board 21-1 is a circuit integrated board, on which a core control board (a central control unit, a commercial system control software, a pressure check supporting algorithm, and an electrical measurement calculation algorithm software) is distributed, a memory, a measurement circuit (connected with an external electrical measurement interface), a display screen socket, a USB interface, and the like.
The main control circuit board 21-1 is further connected with a voltage measuring circuit 71 and a voltage measuring circuit 81, which are connected to an electrical interface of an external calibrated instrument through a pair of external electrical measurement interfaces 87, the electrical interface may be an output electrical interface of an ammeter and a voltmeter, or an electrical signal output end of the calibrated pressure instrument 100, and integrated calibration operation of pressure and electrical signals can be realized.
Method of producing a composite material
The invention provides a method for processing calibration information of a pressure instrument, which is operated by adopting the pressure calibration device and comprises the following steps:
information acquisition: connecting the pressure instrument 100 to be calibrated with the pressure calibration unit 1, connecting the communication module 3 to the network 2, establishing connection with the database 300, and acquiring information corresponding to the model information of the pressure instrument 100 to be calibrated in the database 300 in real time, wherein the information comprises basic information of the pressure instrument to be calibrated, historical calibration data and a calibration scheme; wherein the model information of the pressure meter under calibration 100 includes unique identity information, i.e., an ID code, of the pressure meter under calibration 100.
Calibration and data transmission: the main control unit 2 generates the calibration data of the pressure instrument 100 to be calibrated according to the obtained calibration scheme, and the main control unit 2 uploads the calibration data to the database 300 in real time through the communication module 3.
In the above information obtaining step, the model information of the pressure gauge 100 to be calibrated is transmitted to the main control unit 2 of the pressure calibration apparatus, and the main control unit 2 transmits the model information of the pressure gauge 100 to be calibrated to the communication module 3. The model information transmission modes of the pressure meter 100 to be calibrated are divided into the following three types according to different configurations of the pressure calibration device:
(1) when the camera assembly is not provided in the pressure calibration apparatus, the model information of the calibrated pressure meter 100 is manually input through the display screen 10, that is, the model information is manually input through the display screen 10 and is transmitted to the main control unit 2.
(2) When the camera module is not provided in the pressure calibration apparatus, the configuration file is loaded, that is, the configuration file configured with the model information of the pressure meter 100 to be calibrated is loaded into the main control unit 2, and the model information of the pressure meter 100 to be calibrated is extracted by the main control unit 2.
(3) When the pressure calibration device is provided with the camera assembly, the camera 4 takes a picture and the image recognition program in the main control unit 2 recognizes the taken picture and then obtains the picture, namely, the camera 4 of the camera assembly takes a picture of the pressure instrument (100) to be calibrated, and the image recognition program implanted into the main control unit (2) in advance recognizes the taken picture and obtains the model information of the pressure instrument (100) to be calibrated.
The present calibration information acquired in the above method may be compared with historical calibration information to determine the long-term stability of the calibrated pressure meter 100. The stability determination may be performed anywhere, that is, by connecting the database 300 to download the current calibration data and the historical calibration data, and determining the long-term stability of the pressure meter under calibration 100 through comparison or statistical analysis, for example, determining the long-term stability of the pressure meter under calibration 100 through regression analysis, variance analysis, and the like in the statistical analysis method.
The calibration protocol acquired by the apparatus of the present invention refers to an automatic calibration procedure that performs the calibration operation. The device of the invention carries out automatic calibration according to the acquired calibration scheme and comprises the following steps:
the main control unit 2 controls the pressure calibration module 11 to generate calibration pressure and provide the calibration pressure to the pressure calibration loop according to the obtained calibration scheme, i.e. the automatic calibration program, the calibrated pressure instrument 100 outputs a current signal after receiving the standard pressure and is connected to the current calibration unit 7 through the electrical interface, and the main control unit 2 controls the current calibration unit 7 through the automatic calibration program to read the output current value of the calibrated pressure instrument.
According to the calibration requirements of different calibrated pressure instruments, different calibration points (for example, 10 calibration points of the high-accuracy calibrated pressure instrument and 5 calibration points of the low-accuracy calibrated pressure instrument) are set in the calibration scheme, so that according to the number of the set calibration points, the main control unit 2 implements calibration operation control, performs point-by-point calibration operation on the calibrated pressure instrument 100, and obtains calibration data of each calibration point.
When the camera assembly is not provided in the pressure calibration apparatus described above, acquiring the historical calibration data and the calibration protocol in the information acquisition requires the following steps:
the model information of the pressure instrument 100 to be calibrated is preset through the display screen 10 and stored in the main control unit 2, the main control unit 2 transmits the model information of the pressure instrument 100 to be calibrated to the communication module 3, and then the communication module 3 downloads the basic information, the historical calibration data and the calibration scheme of the pressure instrument to be calibrated from the database 300 in real time through the network 200.
It will be understood by those skilled in the art that these examples or embodiments are for illustrative purposes only and are not intended to limit the invention, and that various equivalent modifications and changes may be made to the invention within the scope of the present disclosure.
Claims (10)
1. A pressure calibration device is used for calibrating a pressure instrument (100) to be calibrated on site, and comprises a pressure calibration unit (1) and a main control unit (2) electrically connected with the pressure calibration unit (1), wherein the pressure calibration unit (1) is externally connected with the pressure instrument (100) to be calibrated, the pressure calibration device is characterized in that the pressure calibration device is further integrated with a communication module (3), the communication module (3) is electrically connected with the main control unit (2) and is accessed into a remote database (300) through a network (200) for downloading historical calibration information and a calibration scheme in real time from the remote database and uploading generated calibration data to the remote database in real time, and the calibration scheme comprises an automatic calibration program for implementing calibration operation;
the pressure calibration unit (1) comprises a pressure generation unit (13), a pressure control module (11), a pressure measurement module (12) and a pressure interface module (14) which are communicated through a gas pipeline, and the pressure measurement module (12) and the pressure control module (11) are respectively and electrically connected to the main control unit (2); the pressure interface module (14) is externally connected with a pressure instrument (100) to be calibrated, the pressure measuring module (12) provides pressure standard data, and high-pressure gas generated by the pressure generating unit (13) enters the pressure control module (11) through a gas pipeline and reaches the pressure instrument (100) to be calibrated through the pressure interface module (14).
2. A pressure calibration device according to claim 1, characterized in that the communication module (3) is a communication program integrated in the master control unit (2), the master control unit (2) being provided with a network interface via which the communication module (3) accesses the remote database (300) over the network (200).
3. A pressure calibration device according to claim 1, characterized in that the communication module (3) is a hardware unit with a connection plug and a network interface, by means of which the communication module (3) is mechanically and electrically connected to the main control unit (2), and by means of which the network interface is connected to the network (200) and to the remote database (300).
4. The pressure calibration device according to claim 1, further comprising a camera assembly electrically connected to the main control unit (2), wherein the camera assembly comprises a camera (4), a camera (5) arranged on the camera (4) and an image recognition program implanted in the main control unit (2), the camera (5) is opposite to the front appearance of the calibrated pressure meter (100), the taken picture is transmitted to the main control unit (2) through the camera (4), and the image recognition program performs image recognition on the taken picture to acquire the model of the calibrated pressure meter and basic information of the calibrated pressure meter.
5. A pressure calibration device according to any of claims 1 to 4, further comprising a power source (9) and/or a display screen (10) electrically connected to the main control unit (2), said power source (9) being a replaceable battery pack or a rechargeable battery pack or an external power source; the display screen (10) is a touch screen or an LED display.
6. A pressure calibration device according to any of claims 1 to 4, further comprising a temperature calibration unit (6) and an electrical signal calibration unit electrically connected to the main control unit (2), the electrical signal calibration unit comprising a current calibration unit (7) and/or a voltage calibration unit (8).
7. A method for processing calibration information of a pressure meter, which is operated by the pressure calibration device of any one of claims 1 to 6, comprising the steps of:
information acquisition: the pressure calibration method comprises the steps that a pressure calibration unit (1) is connected with a pressure instrument (100) to be calibrated, a communication module (3) is connected into a network (200) and is connected with a database (300), and calibration information corresponding to the type of the pressure instrument (100) to be calibrated in the database (300) is obtained in real time and comprises basic information of the pressure instrument to be calibrated, historical calibration data and a calibration scheme;
calibration and data transmission: the main control unit (2) generates the current calibration data of the calibrated pressure instrument (100) according to the obtained calibration scheme, and the main control unit (2) uploads the current calibration data to the database (300) in real time through the communication module (3).
8. The method for processing calibration information of a pressure meter according to claim 7,
in the information acquisition step, the model information of the pressure instrument (100) to be calibrated is transmitted into a main control unit (2) of the pressure calibration device, and the main control unit (2) transmits the model information of the pressure instrument (100) to be calibrated to a communication module (3).
9. The method of processing pressure meter calibration information according to claim 8,
the model information of the pressure instrument (100) to be calibrated is input through a display screen or loaded through a configuration file, or is acquired after a camera shooting image and an image recognition program in the main control unit (2) recognize the shooting image.
10. The method for processing calibration information of a pressure instrument according to any one of claims 7 to 9, wherein the historical calibration data comprises pressure indication values, pressure indication error or pressure indication values, pressure indication error, current value and current indication error of all pressure calibration points of the calibrated pressure instrument; the calibration scheme includes an automatic calibration procedure that performs a calibration operation; the basic information of the pressure meter to be calibrated comprises the measuring range, the precision, the number and the manufacturing plant information of the pressure meter to be calibrated.
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| CN201710574039.8A CN109253837B (en) | 2017-07-14 | 2017-07-14 | Pressure calibration device and processing method of pressure instrument calibration information |
| US16/613,676 US11209332B2 (en) | 2017-07-14 | 2018-09-13 | Pressure calibration apparatus and pressure instrument calibration information processing method |
| PCT/CN2018/105370 WO2019011353A1 (en) | 2017-07-14 | 2018-09-13 | Pressure calibration apparatus and pressure instrument calibration information processing method |
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| CN111060342B (en) * | 2019-12-30 | 2022-06-17 | 3M材料技术（广州）有限公司 | System and method for calibrating a functional module of a water treatment device |
| CN111751049A (en) * | 2020-07-30 | 2020-10-09 | 江南大学 | Automatic detection device and detection method for mechanical pointer instrument |
| CN113970402A (en) * | 2020-12-14 | 2022-01-25 | 北京康斯特仪表科技股份有限公司 | Measurement and calibration device and its management system |
| CN112903186B (en) * | 2021-02-24 | 2022-09-27 | 北京康斯特仪表科技股份有限公司 | Pressure calibration method and pressure calibration device |
| CN113091829B (en) * | 2021-05-07 | 2025-03-04 | 北京康斯特仪表科技股份有限公司 | Structure, method and multiple verification devices supporting module combination configuration |
| CN113465804B (en) * | 2021-06-24 | 2023-09-12 | 珠海市集森电器有限公司 | Quincuncial contact finger clamping force detection method and device |
| CN113375858B (en) * | 2021-06-24 | 2024-07-16 | 北京康斯特仪表科技股份有限公司 | Pressure controller and pressure calibration method based on same |
| CN118376375A (en) * | 2023-09-21 | 2024-07-23 | 中国空气动力研究与发展中心超高速空气动力研究所 | Multi-meter simultaneous calibration method for pressure instrument of large combustion wind tunnel |
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| CN102435392B (en) * | 2011-10-27 | 2014-02-05 | 西北工业大学 | Remote intelligent pressure sensor calibration system |
| CN102706511B (en) * | 2012-05-29 | 2014-03-12 | 西北工业大学 | Device for transferring pressure quantity value through internet in real-time environment |
| CN102680170B (en) * | 2012-05-29 | 2014-04-16 | 西北工业大学 | System for improving accuracy of pressure measuring equipment |
| CN102840948B (en) * | 2012-09-28 | 2014-02-12 | 长庆石油勘探局技术监测中心 | Batch calibration equipment and batch calibration method for intelligent pointer-type pressure gages |
| CN102980715B (en) * | 2012-11-16 | 2015-12-30 | 上海朝辉压力仪器有限公司 | Capacitance pressure transmitter and pressure capsule system |
| US9341537B2 (en) * | 2013-03-12 | 2016-05-17 | Wabtec Holding Corp. | System, method, and apparatus for certifying a brake pressure calibration for an end-of-train device |
| CN103487210A (en) * | 2013-09-27 | 2014-01-01 | 意赛德（天津）自动化仪器有限公司 | Full-automatic calibrating and debugging method and apparatus for intelligent pressure meter |
| CN105547587A (en) * | 2016-01-16 | 2016-05-04 | 德杉科技（北京）有限公司 | Pressure instrument calibration system based on cloud platform |
| CN207074102U (en) * | 2017-07-14 | 2018-03-06 | 北京康斯特仪表科技股份有限公司 | pressure calibration device |
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