CN114324046A - Low-pressure box calibrating device - Google Patents
Low-pressure box calibrating device Download PDFInfo
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- CN114324046A CN114324046A CN202011055660.1A CN202011055660A CN114324046A CN 114324046 A CN114324046 A CN 114324046A CN 202011055660 A CN202011055660 A CN 202011055660A CN 114324046 A CN114324046 A CN 114324046A
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Abstract
The invention discloses a low-pressure box calibration device, which comprises a standard air pressure detection module, a wireless transmission module and a control module which are arranged in a low-pressure box to be calibrated, and also comprises a receiving module and an upper computer which are arranged outside the low-pressure box to be calibrated; the standard air pressure detection module is used for collecting an air pressure value in the low-air-pressure box to be calibrated and sending the air pressure value to the control module, the control module is used for sending the air pressure value to the receiving module through the wireless transmission module, the receiving module is used for sending the air pressure value to the upper computer, and the upper computer is used for comparing the air pressure value with an air pressure set value of the low-air-pressure box to be calibrated and calculating an error; the device can avoid the loaded down with trivial details step of traditional measurement mode, realizes the quick full-automatic examination of low atmospheric pressure test case, greatly improves work efficiency, reduces system error, covers most low atmospheric pressure test cases, and the commonality is strong.
Description
Technical Field
The invention relates to the technical field of metering, in particular to a low-pressure box calibration device.
Background
The low-pressure test equipment is widely applied to product and weapon equipment tests in the fields of military affairs and aerospace. Firstly, testing whether the aerospace product can bear a certain vacuum environment and bear the capability of rapid change of air pressure; and secondly, the device is used for analyzing the strength of the components and the products under the condition of pressure difference resistance to determine the influence of the vacuum environment on the working quality characteristics of the components. Therefore, to ensure the accuracy and reliability of low pressure testing of products and equipment, periodic calibration of the low pressure testing apparatus is required. And the low-pressure test equipment is large-scale test equipment, is not easy to move and generally needs to be calibrated on site.
The problems of the calibration of the conventional low-pressure test chamber mainly include the following aspects: the test box with the air path interface has the defects that the internal and external distribution of an air pressure field is inconsistent under a vacuum environment due to the difference between the internal and external test environments of the low-pressure test box, and the accuracy is not high by utilizing the external air pressure interface to measure data; the electric connection is carried out in a narrow space in the test box due to the existence of the electric interface test box, so that time and labor are wasted; the air-circuit-free and electric-interface-free test box has the advantages that the sensor is arranged in the test box, and the signal wire and the power supply wire are led out from the inside, so that the low-pressure test box has a sealing problem, the low-pressure test box is difficult to pump to the limit low-pressure degree, the pumping speed is reduced, and the metering test efficiency is reduced; calibration data needs to be manually recorded by a metering person, so that the metering workload is increased, and larger errors caused by human factors are increased.
Disclosure of Invention
The invention provides a calibration device for a low-pressure box, which aims to solve the problem of large calibration error of a low-pressure test box in the prior art.
A calibration device for a low pressure tank comprises a standard air pressure detection module, a wireless transmission module and a control module which are arranged in the low pressure tank to be calibrated, and also comprises a receiving module and an upper computer which are arranged outside the low pressure tank to be calibrated;
the standard air pressure detection module is connected with the control module, the control module is connected with the wireless transmission module, the wireless transmission module is in wireless communication connection with the receiving module, and the receiving module is also connected with the upper computer;
the standard air pressure detection module is used for collecting an air pressure value in the low-air-pressure box to be calibrated and sending the air pressure value to the control module, the control module is used for enabling the air pressure value to pass through the wireless transmission module to be sent to the receiving module, the receiving module is used for sending the air pressure value to the upper computer, and the upper computer is used for comparing the air pressure value with an air pressure set value of the low-air-pressure box to be calibrated and calculating errors.
A calibration device for a low-pressure box comprises a standard air pressure detection module, a wireless transmission module and a control module which are arranged in each low-pressure box to be calibrated, and also comprises a receiving module and an upper computer which are arranged outside the low-pressure box to be calibrated;
the standard air pressure detection module is connected with the control module, the control module is connected with the wireless transmission modules, each wireless transmission module is in wireless communication connection with the receiving module, and the receiving module is further connected with the upper computer;
the standard air pressure detection module is used for collecting air pressure values in the low-air-pressure box to be calibrated and sending the air pressure values to the control module, the control module is used for enabling the air pressure values to pass through the wireless transmission module to be sent to the receiving module, the receiving module is used for sending the air pressure values to the upper computer, and the upper computer is used for comparing the air pressure values with air pressure set values of the low-air-pressure box to be calibrated respectively and calculating errors.
In some embodiments, the standard air pressure detection module is a standard low air pressure sensor, and the standard low air pressure sensor is connected with the control module through an RS232 bus.
In some embodiments, the control module comprises a single chip microcomputer.
In some embodiments, the wireless transmission module is a Zigbee wireless transmission module.
In some embodiments, the receiving module is a Zigbee coordinator.
In some embodiments, the host computer is a tablet computer.
In some embodiments, the receiving module is connected with the upper computer through an RS232 bus.
The low-pressure tank calibration device provided by the invention at least comprises the following beneficial effects:
(1) the method has the advantages that the complicated steps of the traditional metering mode are avoided, the quick full-automatic verification of the low-pressure test box is realized, the working efficiency is greatly improved, the system error is reduced, most of low-pressure test boxes are covered, and the universality is strong;
(2) the method gets rid of the constraint of the lead, can achieve the calibration of lower limit air pressure, and is suitable for a high-precision low-air-pressure box;
(3) the calibration of a plurality of low pressure boxes can be realized simultaneously, and the expansibility is strong.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a calibration apparatus for a low pressure tank according to the present invention.
Fig. 2 is a schematic structural diagram of another embodiment of the calibration apparatus for a low pressure tank provided in the present invention.
Detailed description of the preferred embodiments
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Referring to fig. 1, in some embodiments, a calibration apparatus for a low pressure tank is provided, which includes a standard pressure detection module 2, a wireless transmission module 3, and a control module 4 disposed in a low pressure tank 1 to be calibrated, and further includes a receiving module 5 and an upper computer 6 disposed outside the low pressure tank 1 to be calibrated;
the standard air pressure detection module 2 is connected with the control module 4, the control module 4 is connected with the wireless transmission module 3, the wireless transmission module 3 is in wireless communication connection with the receiving module 5, and the receiving module 5 is also connected with the upper computer 6;
the standard air pressure detection module 2 is used for collecting an air pressure value in the low air pressure box 1 to be calibrated and sending the air pressure value to the control module 4, the control module 4 is used for sending the air pressure value to the receiving module 5 through the wireless transmission module 3, the receiving module 5 is used for sending the air pressure value to the upper computer 6, and the upper computer 6 is used for comparing the air pressure value with an air pressure set value of the low air pressure box 1 to be calibrated and calculating an error.
In some embodiments, simultaneous calibration of a plurality of low pressure tanks to be calibrated can be realized, and referring to fig. 2, a low pressure tank calibration device is provided, which includes a standard air pressure detection module 2, a wireless transmission module 3 and a control module 4 which are arranged in each low pressure tank 1 to be calibrated, and further includes a receiving module 5 and an upper computer 6 which are arranged outside the low pressure tank 1 to be calibrated;
the standard air pressure detection module 2 is connected with the control module 4, the control module 4 is connected with the wireless transmission modules 3, each wireless transmission module 3 is in wireless communication connection with the receiving module 5, and the receiving module 5 is also connected with the upper computer 6;
the standard air pressure detection module 2 is used for collecting air pressure values in the low air pressure box 1 to be calibrated and sending the air pressure values to the control module 4, the control module 4 is used for sending the air pressure values to the receiving module 5 through the wireless transmission module 3, the receiving module 5 is used for sending the air pressure values to the upper computer 6, and the upper computer 6 is used for comparing the air pressure values with air pressure set values of the low air pressure box 1 to be calibrated respectively and calculating errors.
In some embodiments, the standard barometric pressure monitoring module 2 is a standard barometric pressure sensor, and the standard barometric pressure sensor is connected to the control module 4 through an RS232 bus.
In some embodiments, the standard air pressure detection module 2 adopts a U.S. Delux RPT350 ultra-high precision silicon resonance low air pressure sensor, the precision reaches 0.01% FS, and RS232/485 output is supported.
In some embodiments, the control module 4 comprises a single-chip microcomputer.
In some embodiments, the wireless transmission module 3 is a Zigbee wireless transmission module.
In some embodiments, the receiving module 5 is a Zigbee coordinator.
In some embodiments, the upper computer 6 is a tablet computer.
In some embodiments, the receiving module 5 is connected with the upper computer 6 through an RS232 bus.
The standard air pressure detection module 2 is responsible for collecting air pressure value information in the low air pressure test box 1 to be calibrated, and the measured air pressure value is sent to the Zigbee coordinator through a ZigBee transmission protocol by relying on a control module 4 with a single chip microcomputer as a main control chip; and the Zigbee coordinator also receives ZigBee transmission data by using a CC2630 chip, communicates with the tablet personal computer through an RS485 serial port, and utilizes LabVIEW to write upper computer software to collect, process, store and display the air pressure value. And comparing the measured air pressure value with the set air pressure value of the low-air-pressure test box to be calibrated and calculating various errors of each set point. After the calibration is finished, the computer automatically processes and stores the error data, and finally, a record table is automatically generated. In addition, a plurality of low-pressure test boxes to be calibrated can be calibrated simultaneously.
In summary, the calibration device for the low pressure tank provided by the above embodiment at least comprises the following beneficial effects:
(1) the method has the advantages that the complicated steps of the traditional metering mode are avoided, the quick full-automatic verification of the low-pressure test box is realized, the working efficiency is greatly improved, the system error is reduced, most of low-pressure test boxes are covered, and the universality is strong;
(2) the method gets rid of the constraint of the lead, can achieve the calibration of lower limit air pressure, and is suitable for a high-precision low-air-pressure box;
(3) the calibration of a plurality of low pressure boxes can be realized simultaneously, and the expansibility is strong.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. The calibration device for the low-pressure box is characterized by comprising a standard air pressure detection module, a wireless transmission module and a control module which are arranged in the low-pressure box to be calibrated, and also comprising a receiving module and an upper computer which are arranged outside the low-pressure box to be calibrated;
the standard air pressure detection module is connected with the control module, the control module is connected with the wireless transmission module, the wireless transmission module is in wireless communication connection with the receiving module, and the receiving module is also connected with the upper computer;
the standard air pressure detection module is used for collecting an air pressure value in the low-air-pressure box to be calibrated and sending the air pressure value to the control module, the control module is used for enabling the air pressure value to pass through the wireless transmission module to be sent to the receiving module, the receiving module is used for sending the air pressure value to the upper computer, and the upper computer is used for comparing the air pressure value with an air pressure set value of the low-air-pressure box to be calibrated and calculating errors.
2. The calibration device for the low-pressure boxes is characterized by comprising a standard air pressure detection module, a wireless transmission module and a control module which are arranged in each low-pressure box to be calibrated, and also comprising a receiving module and an upper computer which are arranged outside the low-pressure box to be calibrated;
the standard air pressure detection module is connected with the control module, the control module is connected with the wireless transmission modules, each wireless transmission module is in wireless communication connection with the receiving module, and the receiving module is further connected with the upper computer;
the standard air pressure detection module is used for collecting air pressure values in the low-air-pressure box to be calibrated and sending the air pressure values to the control module, the control module is used for enabling the air pressure values to pass through the wireless transmission module to be sent to the receiving module, the receiving module is used for sending the air pressure values to the upper computer, and the upper computer is used for comparing the air pressure values with air pressure set values of the low-air-pressure box to be calibrated respectively and calculating errors.
3. The calibration device of claim 1 or 2, wherein the standard barometric pressure test module is a standard barometric pressure sensor, and the standard barometric pressure sensor is connected to the control module through an RS232 bus.
4. The calibration device of claim 1 or 2, wherein the control module comprises a single-chip microcomputer.
5. The calibration device of claim 1 or 2, wherein the wireless transmission module is a Zigbee wireless transmission module.
6. The calibration device of claim 5, wherein the receiving module is a Zigbee coordinator.
7. The calibration device of claim 1 or 2, wherein the upper computer is a tablet computer.
8. The calibration device of claim 1 or 2, wherein the receiving module is connected to the upper computer through an RS232 bus.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011055660.1A CN114324046A (en) | 2020-09-30 | 2020-09-30 | Low-pressure box calibrating device |
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| CN202011055660.1A CN114324046A (en) | 2020-09-30 | 2020-09-30 | Low-pressure box calibrating device |
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