CN204514537U - A kind of wireless pressure data collecting instrument calibrating installation - Google Patents
A kind of wireless pressure data collecting instrument calibrating installation Download PDFInfo
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- CN204514537U CN204514537U CN201520245287.4U CN201520245287U CN204514537U CN 204514537 U CN204514537 U CN 204514537U CN 201520245287 U CN201520245287 U CN 201520245287U CN 204514537 U CN204514537 U CN 204514537U
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Abstract
The utility model discloses a kind of wireless pressure data collecting instrument calibrating installation, comprise head tank, pressure tank cover, digital pressure gauge standard, draft tube, gas outlet, gas admittance valve and vent valve; Described pressure tank cover is arranged on head tank, described digital pressure gauge standard is arranged on pressure tank cover, described draft tube and gas outlet communicate with described head tank through pressure tank cover, and described gas admittance valve is arranged in draft tube, and described vent valve is arranged in gas outlet.Wireless pressure data collecting instrument to be measured is arranged in the head tank of sealing by the utility model, the pressure in head tank is regulated by gas admittance valve and vent valve, the actual pressure in head tank is measured by digital pressure gauge standard, wireless pressure data collecting instrument is calibrated at each spot pressure, and obtain Acquisition Instrument in the error of indication of each calibration point and hysterisis error, solve wireless pressure data collecting instrument magnitude tracing problem.
Description
Technical field
The utility model relates to a kind of instrument calibration device, particularly relates to a kind of wireless pressure data collecting instrument calibrating installation.
Background technology
Along with the development of wireless sensor technology, wireless pressure data collecting instrument is widely used in measuring pressure in closed container.Refer to Fig. 1, it is the structural representation of existing wireless pressure data collecting instrument 10.Wireless pressure data collecting instrument 10 comprises pressure transducer 11, signal condition unit 12, AD sampling unit 13, microprocessor 14, RF module 15 and storer 16.Described pressure transducer 11 exports electric signal and amplifies through signal condition unit 12, by A/D convertor circuit 13 be converted to digital signal send into microprocessor 14 carry out data processing, be transmitted to receiving terminal by RF module 15 or by data stored in storer 16.Wireless pressure data collecting instrument first arranges mode of operation, acquisition interval, start and stop condition usually, then inserts pressure seal container, and equipment pressurizes, and reads wireless pressure data collecting instrument indicating value and acquisition time in real time.In order to ensure and improve measuring accuracy and the stability of wireless pressure data collecting instrument, periodic dosages calibration must be carried out to wireless pressure data collecting instrument.And wireless pressure data collecting instrument is different from normal pressures surveying instrument, it does not possess compression fittings, without the need to jointing during measurement, not yet has the specific calibrating installation to data acquisition instrument in the market.
Utility model content
The utility model is that the shortcoming overcoming prior art is with not enough, provides a kind of calibrating installation calibrated wireless pressure data collecting instrument.
The utility model is achieved through the following technical solutions: a kind of wireless pressure data collecting instrument calibrating installation, comprises head tank, pressure tank cover, digital pressure gauge standard, draft tube, gas outlet, gas admittance valve and vent valve; Described pressure tank cover is arranged on head tank, described digital pressure gauge standard is connected with the compression fittings on pressure tank cover and measures the pressure in head tank, described draft tube and gas outlet communicate with described head tank through pressure tank cover, described gas admittance valve is arranged in draft tube, and described vent valve is arranged in gas outlet.
Wireless pressure data collecting instrument to be measured is arranged in the head tank of sealing by the utility model, the pressure in head tank is regulated by gas admittance valve and vent valve, the actual pressure in head tank is measured by digital pressure gauge standard, wireless pressure data collecting instrument is calibrated at each spot pressure, and obtain Acquisition Instrument in the error of indication of each calibration point and hysterisis error, solve wireless pressure data collecting instrument magnitude tracing problem.
Further, described head tank is airtight tank body.
Further, described head tank is high pressure resistant, high temperature resistant and that heat-conductive characteristic is good tank body.
Further, described pressure tank cover be high pressure resistant, high temperature resistant, heat-conductive characteristic is good and the lid that sealing is good.
Further, described pressure tank cover and described head tank are tightly connected.
In order to understand better and implement, describe the utility model in detail below in conjunction with accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing wireless pressure data collecting instrument 10;
Fig. 2 is the structural representation of the utility model embodiment wireless pressure data collecting instrument calibrating installation 20.
Embodiment
Refer to Fig. 2, it is the structural representation of the utility model embodiment wireless pressure data collecting instrument calibrating installation 20.This wireless pressure data collecting instrument calibrating installation 20 comprises: head tank 21, pressure tank cover 22, digital pressure gauge standard 23, draft tube 24, gas outlet 25, gas admittance valve 26 and vent valve 27.Described pressure tank cover 22 is arranged on head tank 21, and described digital pressure gauge standard 23 is connected with the compression fittings (not shown) on pressure tank cover 22 and measures the pressure in head tank.Described draft tube 24 and gas outlet 25 communicate with described head tank 21 through pressure tank cover 22, and described gas admittance valve 26 is arranged in draft tube 24, and described draft tube 24 is connected with nitrogen cylinder or Manual pressurization pump, and controls the size of air inlet by gas admittance valve 26; Described vent valve 27 is arranged in gas outlet 25.Manually regulate the size of pressure in described vent valve 27 and gas admittance valve 26 controlled pressure tank 21.
Concrete, described head tank 21 is airtight tank body.In the present embodiment, described head tank 21 is high pressure resistant, high temperature resistant and that heat-conductive characteristic is good tank body.Matchingly, described pressure tank cover 22 is high pressure resistant, high temperature resistant and the good and lid that sealing is good of heat-conductive characteristic.For guaranteeing the accuracy of pressure in Acquisition Instrument test pressure tank 21, described pressure tank cover 22 is tightly connected with described head tank 21.
At normal temperatures, when the calibration of pressure indicating value is carried out to wireless pressure data collecting instrument 28, wireless pressure data instrument 28 to be measured is positioned in head tank 21, pressure tank cover 22 is tightened head tank 21 is sealed.Open gas admittance valve 26, external air source to be ventilated pressurization to head tank 21 by draft tube 24, and pointwise improves the pressure in head tank 21; Record digital pressure gauge standard 23 is in the indicating value of each spot pressure; Obtain the positive and negative stroke indicating value of wireless pressure data collecting instrument 28 at each spot pressure; And calculate wireless pressure data collecting instrument 28 error of indication and hysterisis error, realize the calibration to each point in wireless pressure data collecting instrument 28 pressure measurement range.
Concrete, to the measurement of certain pressure calibration point, first open gas admittance valve 26, external air source to be ventilated pressurization to head tank 21 by draft tube 24, in pressure process, the indicating value of Observable digital pressure gauge standard 23 adjusts.When observation digital pressure gauge 23 is near this pressure calibration point, close gas admittance valve 24, the indicating value of record digital pressure gauge standard 23 after pressure stabilisation, and obtain the moment value recording this indicating value.In the utility model, digital pressure gauge standard 23 is as the pressure actual value of standard indicated pressure tank 21.Pressure indicating value in wireless pressure data collecting instrument 28 real time record head tank 21, after having measured, reads the indicating value of the wireless pressure data collecting instrument 26 corresponding with record digital pressure gauge standard 23 moment.For ensureing the reliability of data, to each base measuring pressure calibration point, the indicating value of the positive and negative stroke of Acquisition Instrument need be obtained, and calculating the error of indication and the hysterisis error of this point.
The computing formula of the error of indication is as follows:
Δp＝p
R-p
S
In formula, Δ p is the Acquisition Instrument error of indication, and its unit is kPa or MPa; p
rfor the positive and negative stroke indicating value of each calibration point of Acquisition Instrument, its unit is kPa or MPa; p
sfor digital pressure gauge standard is in the indicating value of each calibration point, its unit is kPa or MPa.
Hysterisis error can utilize the data of the error of indication to calculate, and gets the hysterisis error of absolute value as wireless pressure data collecting instrument of the difference of the positive and negative stroke indicating value of same calibration point.
Wireless pressure data collecting instrument to be measured is arranged in the head tank of sealing by the utility model, the pressure in head tank is regulated by gas admittance valve and vent valve, the actual pressure in head tank is measured by digital pressure gauge standard, wireless pressure data collecting instrument is calibrated at each spot pressure, and obtain Acquisition Instrument in the error of indication of each calibration point and hysterisis error, solve wireless pressure data collecting instrument magnitude tracing problem.
The utility model is not limited to above-mentioned embodiment, if do not depart from spirit and scope of the present utility model to various change of the present utility model or distortion, if these are changed and distortion belongs within claim of the present utility model and equivalent technologies scope, then the utility model is also intended to comprise these changes and distortion.
Claims (5)
1. a wireless pressure data collecting instrument calibrating installation, is characterized in that: comprise head tank, pressure tank cover, digital pressure gauge standard, draft tube, gas outlet, gas admittance valve and vent valve; Described pressure tank cover is arranged on head tank, described digital pressure gauge standard is connected with the compression fittings on pressure tank cover and measures the pressure in head tank, described draft tube and gas outlet communicate with described head tank through pressure tank cover, described gas admittance valve is arranged in draft tube, and described vent valve is arranged in gas outlet.
2. wireless pressure data collecting instrument calibrating installation according to claim 1, is characterized in that: described head tank is airtight tank body.
3. wireless pressure data collecting instrument calibrating installation according to claim 2, is characterized in that: described head tank is high pressure resistant, high temperature resistant and that heat-conductive characteristic is good tank body.
4. wireless pressure data collecting instrument calibrating installation according to claim 3, is characterized in that: described pressure tank cover be high pressure resistant, high temperature resistant, heat-conductive characteristic is good and the lid that sealing is good.
5. wireless pressure data collecting instrument calibrating installation according to claim 4, is characterized in that: described pressure tank cover and described head tank are tightly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520245287.4U CN204514537U (en) | 2015-04-22 | 2015-04-22 | A kind of wireless pressure data collecting instrument calibrating installation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520245287.4U CN204514537U (en) | 2015-04-22 | 2015-04-22 | A kind of wireless pressure data collecting instrument calibrating installation |
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| CN204514537U true CN204514537U (en) | 2015-07-29 |
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| CN201520245287.4U Active CN204514537U (en) | 2015-04-22 | 2015-04-22 | A kind of wireless pressure data collecting instrument calibrating installation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792458A (en) * | 2015-04-22 | 2015-07-22 | 湖南省计量检测研究院 | Wireless pressure data acquiring instrument calibrating device and method thereof |
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2015
- 2015-04-22 CN CN201520245287.4U patent/CN204514537U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792458A (en) * | 2015-04-22 | 2015-07-22 | 湖南省计量检测研究院 | Wireless pressure data acquiring instrument calibrating device and method thereof |
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