CN109855798A - A kind of portable pressure in-line calibration device based on PXI bussing technique - Google Patents
A kind of portable pressure in-line calibration device based on PXI bussing technique Download PDFInfo
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- CN109855798A CN109855798A CN201811499813.4A CN201811499813A CN109855798A CN 109855798 A CN109855798 A CN 109855798A CN 201811499813 A CN201811499813 A CN 201811499813A CN 109855798 A CN109855798 A CN 109855798A
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Abstract
The invention discloses a kind of portable pressure in-line calibration device based on PXI bussing technique, belong to pressure measurement technical field, including portable PXI cabinet, PXI power supply module, PXI DC current acquisition module, PXI DC voltage acquisition module, display, keyboard, controller and standard pressure transducer；Controller is connected with PXI power supply module, PXI DC current acquisition module, PXI DC voltage acquisition module, display, keyboard respectively by PXI bus, display, keyboard, controller etc. are integrated in portable PXI cabinet, and PXI power supply module, PXI DC current acquisition module and PXI DC voltage acquisition module are connected with standard pressure transducer respectively.Portable pressure in-line calibration device based on PXI bussing technique of the invention is able to solve the fast and automatically change calibrating of pressure sensor, reduces the quantity and volume of normal pressure equipment, greatly promotes the calibrating efficiency of pressure sensor.
Description
Technical field
The present invention relates to a kind of portable pressure in-line calibration device based on PXI bussing technique is used for pressure sensor
In-line calibration, in-line calibration is carried out to the error of indication of pressure sensor in pipeline, repeated parameter, belongs to pressure measurement skill
Art field.
Background technique
Now each type III pressure vessel, in pressure delivery equipment, largely measured and monitored in pipeline using pressure sensor
Pressure medium, if these pressure sensors failure cause display malfunction, can have security risk.According to state's domestic discipline and family rules
Fixed, for the accuracy for ensuring pressure detecting, above-mentioned pressure sensor needs periodically to be examined and determine by professional metrological service.
The calibration method of existing pressure sensor is: being sent to professional institution after above-mentioned pressure sensor is removed and examines
It is fixed, but due to removing and installation process is likely to result in helicitic texture and is undermined leakage again.
In-line calibration can effectively solve the above problem, and pressure in-line calibration is mainly with pressure sensor, number pressure at present
Power is counted as being connected into tested pressure gauge pipeline for standard, when standard is pressure sensor, it is also necessary to configure power supply and supply for it
Electricity, and the analog quantity that standard transducer exports is read using DC ammeter/D.C. voltmeter, so that number of devices is more, no
It is easy to carry, it is unfavorable for the raising of working efficiency；In addition, being detected pressure sensor output valve with the raising of automatization level
It is generally obtained by its host computer, and feedback and control as some movements, if it is possible to realize calibrating installation and its host computer
It is communicated to obtain tested pressure sensor numerical value, it will calibrating efficiency is greatly improved, becoming automation pressure calibration can
Energy.
Therefore it provides it is a kind of miniaturization, automation pressure in-line calibration device, by on accredited pressure sensor
Position machine is communicated, and realizes the on-line automaticization calibrating of pressure sensor, it is difficult just to become technical field technology urgently to be solved
Topic.
Summary of the invention
It is an object of the present invention to provide a kind of portable pressure in-line calibration device based on PXI bussing technique overcomes existing
There is defect of the pressure in-line calibration method in terms of portability, automation, establishes a kind of miniaturization, automation using PXI bus
Pressure in-line calibration method realize the online of pressure sensor by being communicated with accredited pressure sensor host computer
Automatic calibration.
Above-mentioned purpose of the invention reaches by the following technical programs
A kind of portable pressure in-line calibration device based on PXI bussing technique, it is characterised in that: including portable PXI
Cabinet, PXI power supply module, PXI DC current acquisition module, PXI DC voltage acquisition module, display, keyboard, controller with
And standard pressure transducer；The controller acquires mould with the PXI power supply module, PXI DC current respectively by PXI bus
Block, PXI DC voltage acquisition module, display, keyboard are connected, the display, keyboard, controller, PXI power supply module,
PXI DC current acquisition module and PXI DC voltage acquisition module are integrated in portable PXI cabinet, the PXI power supply mould
Block, PXI DC current acquisition module and PXI DC voltage acquisition module are connected with the standard pressure transducer respectively.
Preferably, the portable PXI cabinet is equipped with 4 or more PXI slots.
Preferably, the controller is equipped with network interface and serial ports.
Preferably, the PXI slot provides network interface, RS232/RS422 serial ports.
Preferably, the standard pressure transducer acquisition pressure mode can be serial ports, DC voltage (1~5) V, (4~20)
Tri- kinds of modes of mA.
Preferably, the measurement range of the standard pressure transducer should be greater than or equal to tested pressure sensor measurement model
It encloses.
Preferably, it is maximum to be no more than tested pressure sensor for the limits of error absolute value of the standard pressure transducer
The 1/2 of allowable error absolute value.
The utility model has the advantages that
Portable pressure in-line calibration device based on PXI bussing technique of the invention is built upon on PXI bussing technique,
By by display, keyboard, controller, standard transducer power supply module, DC current acquisition module, DC voltage acquisition module
Be integrated in a miniaturization, portability PXI cabinet in, and using network interface, serial ports realize with tested pressure sensor host computer
Communication, it is automatic to obtain tested pressure sensor numerical value, it is compared, reduces with the standard pressure transducer of outfit acquisition numerical value
Manual operation bring error.
Portable pressure in-line calibration device based on PXI bussing technique of the invention is able to solve the fast of pressure sensor
Speed, automatic calibration reduce the quantity and volume of normal pressure equipment, greatly promote the calibrating efficiency of pressure sensor.
Elaborate with reference to the accompanying drawings and detailed description to the present invention: the present embodiment is with the technology of the present invention side
Implemented under premised on case, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not
It is limited to following embodiments.
Detailed description of the invention
Fig. 1 is that the present invention is based on the structural schematic diagrams of the portable pressure in-line calibration device of PXI bussing technique.
Fig. 2 is that the present invention is based on the application connection figures of the portable pressure in-line calibration device of PXI bussing technique.
Specific embodiment
Embodiment 1
As shown in Figure 1, for the present invention is based on the structural representations of the portable pressure in-line calibration device of PXI bussing technique
Figure；
A kind of portable pressure in-line calibration device based on PXI bussing technique, including portable PXI cabinet, PXI power supply
Module, PXI DC current acquisition module, PXI DC voltage acquisition module, display, keyboard, controller and normal pressure pass
Sensor；Controller acquires mould with PXI power supply module, PXI DC current acquisition module, PXI DC voltage respectively by PXI bus
Block, display, keyboard are connected, display, keyboard, controller, PXI power supply module, PXI DC current acquisition module and PXI
DC voltage acquisition module is integrated in portable PXI cabinet, and PXI power supply module, PXI DC current acquisition module and PXI are straight
Stream voltage acquisition module is connected with standard pressure transducer respectively；Portable PXI cabinet is equipped with 4 or more PXI slots；PXI
Slot provides network interface, RS232/RS422 serial ports；Standard pressure transducer acquire pressure mode can for serial ports, DC voltage (1~
5) tri- kinds of V, (4~20) mA modes；The measurement range of standard pressure transducer should be greater than or equal to tested pressure sensor survey
Measure range；It is absolute that the limits of error absolute value of standard pressure transducer is no more than the tested pressure sensor limits of error
The 1/2 of value；Portable PXI cabinet integrates display, keyboard, controller, have the characteristics that miniaturization, it is light-weight,
4 or more PXI slots are capable of providing, network interface, RS232/RS422 serial ports are capable of providing；PXI power supply module can be normal pressure
Sensor provides DC voltage, and the specific nominal supply voltage of voltage value establishing criteria pressure sensor executes；PXI DC current is adopted
Collection module is used to acquire (4~20) mA DC current values of standard pressure transducer output, generally takes up a PXI slot, adopts
Current collection flow valuve is sent to portable PXI crate controller by PXI bus；PXI DC voltage acquisition module is for acquiring standard
(1~5) V DC voltage value of pressure sensor output, generally takes up a PXI slot, collection voltages value is sent out by PXI bus
Give portable PXI crate controller；It can be serial ports, DC voltage (1~5) V, (4 that standard pressure transducer, which acquires pressure mode,
~20) tri- kinds of modes of mA, measurement range should be greater than or equal to tested pressure sensor measurement range, the limits of error
Absolute value is no more than the 1/2 of tested pressure sensor limits of error absolute value.
As shown in Fig. 2, for the present invention is based on the application connections of the portable pressure in-line calibration device of PXI bussing technique
Figure；When carrying out pressure sensor in-line calibration, standard pressure transducer is connected to tested pressure sensing by pipe joint
Where device in pipeline, while portable PXI cabinet being passed through on the network interface/serial ports and tested pressure sensor on controller module
Position machine is attached, the automatic adjustment of loine pressure and tested pressure sensor pressure value where realizing tested pressure sensor
Automatic acquisition；It is standard pressure transducer power supply by PXI power supply module, while according to standard pressure transducer signal output class
Type selects portable PXI crate controller serial ports, PXI DC current acquisition module, PXI DC voltage acquisition module to acquire
Standard pressure transducer signal, using the comparison of standard pressure transducer numerical value and tested pressure sensor numerical value, realize it is online,
Automation, portability calibrating.
Portable pressure in-line calibration device based on PXI bussing technique of the invention is based on PXI bus principle, using collection
The portable PXI cabinet that display, keyboard, controller are integrated is permitted according to the measurement range of tested pressure sensor and maximum
Perhaps error selects corresponding standard pressure transducer, and is powered by PXI power supply module for it；Standard pressure transducer access is tested
Pipeline where pressure sensor is when selecting standard pressure transducer is that (4~20) mA DC current exports, then straight using PXI
It flows current acquisition module and acquires standard pressure transducer output signal；When selection standard pressure transducer is (1~5) V direct current
When stream output, then standard pressure transducer output signal is acquired using PXI DC voltage acquisition module；When selection normal pressure passes
When sensor is serial communication, portable PXI crate controller acquisition standard pressure transducer output signal is directlyed adopt；In addition,
For the difference of tested pressure sensor host computer communication mode, work out pressure in-line calibration software, by controller network interface,
RS232/RS422 serial ports is communicated with tested pressure sensor host computer, realizes loine pressure where tested pressure sensor
Automatic control while, it is automatic to obtain tested pressure sensor numerical value, since all controls, acquisition function are integrated in miniaturization
Portable PXI cabinet in, to realize on-line Fullization of pressure sensor, portable calibrating.
Portable pressure in-line calibration device based on PXI bussing technique of the invention, PXI bussing technique can be by matching
Power supply, acquisition, communication and data processing are integrated in the cabinet of a miniaturization by the PXI board for setting different function, realize inspection
The automation for determining process changes existing calibrating mode.
Claims (7)
1. a kind of portable pressure in-line calibration device based on PXI bussing technique, it is characterised in that: including portable PXI machine
Case, PXI power supply module, PXI DC current acquisition module, PXI DC voltage acquisition module, display, keyboard, controller and
Standard pressure transducer；The controller acquires mould with the PXI power supply module, PXI DC current respectively by PXI bus
Block, PXI DC voltage acquisition module, display, keyboard are connected, the display, keyboard, controller, PXI power supply module,
PXI DC current acquisition module and PXI DC voltage acquisition module are integrated in portable PXI cabinet, the PXI power supply mould
Block, PXI DC current acquisition module and PXI DC voltage acquisition module are connected with the standard pressure transducer respectively.
2. the portable pressure in-line calibration device based on PXI bussing technique as described in claim 1, it is characterised in that: institute
Portable PXI cabinet is stated equipped with 4 or more PXI slots.
3. the portable pressure in-line calibration device based on PXI bussing technique as described in claim 1, it is characterised in that: institute
Controller is stated equipped with network interface and serial ports.
4. the portable pressure in-line calibration device based on PXI bussing technique as described in claim 1, it is characterised in that: institute
It states PXI slot and network interface, RS232/RS422 serial ports is provided.
5. the portable pressure in-line calibration device based on PXI bussing technique as described in claim 1, it is characterised in that: institute
Stating standard pressure transducer acquisition pressure mode can be tri- kinds of serial ports, DC voltage (1~5) V or (4~20) mA modes.
6. the portable pressure in-line calibration device based on PXI bussing technique as described in claim 1, it is characterised in that: institute
The measurement range for stating standard pressure transducer should be greater than or equal to tested pressure sensor measurement range.
7. the portable pressure in-line calibration device based on PXI bussing technique as described in claim 1, it is characterised in that: institute
The limits of error absolute value for stating standard pressure transducer is no more than tested pressure sensor limits of error absolute value
1/2。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811499813.4A CN109855798A (en) | 2018-12-09 | 2018-12-09 | A kind of portable pressure in-line calibration device based on PXI bussing technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811499813.4A CN109855798A (en) | 2018-12-09 | 2018-12-09 | A kind of portable pressure in-line calibration device based on PXI bussing technique |
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ID=66890870
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110262381A (en) * | 2019-07-06 | 2019-09-20 | 精华电子(苏州)有限公司 | A kind of industrial control unit (ICU) |
| CN111664993A (en) * | 2020-07-16 | 2020-09-15 | 毕节市质量技术监督检测所 | Automatic calibrating device and method for force measuring equipment |
| CN112082694A (en) * | 2019-06-14 | 2020-12-15 | 北京振兴计量测试研究所 | Power supply and signal acquisition device for pressure sensor |
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Application publication date: 20190607 |
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