CN2230924Y - Integrated digital pressure and pressure difference meter checking instrument - Google Patents
Integrated digital pressure and pressure difference meter checking instrument Download PDFInfo
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- CN2230924Y CN2230924Y CN 94229870 CN94229870U CN2230924Y CN 2230924 Y CN2230924 Y CN 2230924Y CN 94229870 CN94229870 CN 94229870 CN 94229870 U CN94229870 U CN 94229870U CN 2230924 Y CN2230924 Y CN 2230924Y
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Abstract
The utility model relates to a testing device for pressure and differential pressure instruments, which is composed of a pressure signal generator, a diffusion silicon pressure transducer, a current signal range converter, a current signal range option switch, a pressure range option switch, a resistor array, a display mode option switch, an error detecting converter, an error alarm, an input/outgoing signal displayer, an accumulator battery, a power supply converter, a case, a panel, etc. The utility model integrates all the required instruments for the test of the pressure and pressure difference instruments and adopts a collation testing method of the input/output pressure and an error testing method. Therefore, the utility model has the characteristics of high testing accuracy and testing efficiency, small size, light weight, powerful functions, etc.
Description
What the new wall of this practicality related to is industrial manometer calibrating instrument, is a kind of integrative digit type pressure and differential pressure meter calibrating instrument.
Industrial manometer calibrating instrument has the precision digital tensimeter in the prior art, digital electrical pressure transmitter check meter, portable pressure signal generators etc. are in these calibrating instruments, more complete with portable pressure signal generator function, but also have following problem:
1, still having kept traditional tested table input is standard with " pressure ", and output is standard with " electric current ", and this method has the following disadvantages:
(1), input and output unit be inconsistent, can not directly compare;
(2), input and output signal relationship value, must determine by calculating, increased the calibration operation amount;
(3), require each calibrating point input pressure set-point of tested table very accurate, otherwise will produce gauging error; In addition, accurately the setting pressure signal the running time of length, hinders the raising of calibrating efficient.
2, instrument fully integratedization not as yet
24V.DC is provided power supply can not for tested table, when calibrating, need be equipped with the 24V.DC power-supply device in addition.
3, no tested Watch Error Presentation Function
Still rest on traditional method, go out tested table by the calibrating data computation and respectively examine and determine point tolerance, be an impediment to the raising of calibrating efficient and quality.
4, error free overload alarm
Must be behind the error amount that draws each calibrating point, after contrasting with tested table permissible error, know to be equipped with calibrating point whether overproof (limit).Be unfavorable for examining and determine the raising of efficient.
5, the charging of instrument and the non-parallel mode of work
Can not charge during instrument work, charging then can not be worked, and has reduced " utilization factor " of instrument.
6, manually pressure device provides pressure signal, must set up pressurizing valve, reduction valve and air-capacitor etc.
Both increased the device fabrication expense, also made troubles to operation.
The purpose of this utility model is to provide a kind of integrative digit type pressure and differential pressure meter calibrating instrument that can overcome above-mentioned deficiency.
Above-mentioned purpose of the present utility model is to realize by such technical scheme.Being it is made up of the input of pressure signal generator, diffused-silicon pressure transducer, current signal range converter, current signal range switch, pressure range switch, resistor chain, display mode selector switch, error-detecting transducer, error alarm, tested table and output signal display, supply convertor etc., it is characterized in that: the pressure signal input end that the output terminal of pressure signal generator divides two-way one tunnel to be connected to tested table, another road is connected to pressure converter, and the tested table input pressure value of pressure converter output is delivered to the input pressure display; The signal output part of tested table is by the current signal range switch, the pressure range switch, resistor chain, the display mode selector switch is connected to tested gauge pressure Output Display Unit after range conversion, export the force value of the tested table output signal of 0～10mA by it, or directly connect the pressure Output Display Unit through the display mode selector switch, show current value by it, or through current signal range selector switch, the current signal range converter, the pressure range switch, resistor chain, be connected to Output Display Unit after the display mode selector switch, show the force value of the tested table output signal of 4～20mA by it, the output terminal of pressure converter and resistor chain also is connected to the error-detecting transducer, its output terminal divides two-way, one the tunnel through showing that selector switch shows tested Watch Error value by the pressure Output Display Unit, and the error alarm is transported on another road; Supply convertor provides stable working power to other circuit.
Said structure of the present utility model can further specify by accompanying drawing.
Accompanying drawing 1 is a theory diagram of the present utility model;
Accompanying drawing 2 is the structured flowchart of the utility model pressure signal generator;
Accompanying drawing 3 is the structured flowchart of supply convertor;
Accompanying drawing 4 is a circuit structure diagram of the present utility model.
Referring to Fig. 1, Fig. 4, the utility model is examined by pressure signal generator PFX, diffused-silicon pressure transducer KBY, current signal range converter PIC, current signal range switch LK, pressure range switch LKS, resistor chain RSP, display mode selector switch SGK, error that then transducer WC, error alarm WCA, pressure input value and output valve display CRT1 and CRT2, accumulator CD, supply convertor CDH, front and back panels etc. are formed.Wherein:
Current signal range converter PLC is that model is the power pack of TC4A, and it is 0～10m with 4～20mA conversion of signals of tested table BPD output, and A delivers to CRT2 through LKS, RSP, SGK and shows.
Current signal range switch LK adopts waver, because the output of tested table has 0～10mA and two kinds of signals of 4～20mA, switches through LK, send PLC to do range conversion 4～20mA, is that 0～10mA signal then send LKS as output.
Pressure range switch LKS adopts Position change switch, is used to select the range of tested table.
Resistor chain RSP forms for several resistance corresponding with range, and it cooperates with LKS, finishes the range conversion of tested table.The conversion of signals that is about to 0～10mA of output is a voltage signal, send CRT2 to show, the output signal force value that is the inspection table shows.
Error-detecting transducer WC model is the data amplifier of ZF-640, and it is delivered to the signal of diffused-silicon pressure transducer KBY and the resistor chain RS output processing and amplifying of making comparisons CRT2 through display mode selector switch SGK and show that displayed value is the error amount of tested table.
Error alarm WCA is by benchmark constant pressure source, error setting apparatus, and voltage comparator and light emitting diode constitute, and it compares to determine output and the error setting value of WC, when error transfinites, light emitting diode sends the light warning.
Diffused-silicon pressure transducer KBY is a pressure conversion standard package, and it is converted to voltage signal with the pressure signal of input, send CRT1 to show that this display indicating value is the force value of the input of tested table, and this signal is also delivered to WC and made error ratio.
What display mode selector switch SGK adopted is waver, and it finishes the selection that CRT2 shows the error that tested table output current shows, pressure shows and WC exports.
Input, Output Display Unit CRT1 and CRT2, adopting model is 41/2 LED digital indicator of SM-48A type, shows tested table input pressure value respectively, output current value, force value or error amount.
Referring to Fig. 2, pressure generator PFX of the present utility model is made of cylinder 1, piston 2, T type screw rod 3, handle 4 and pressure efferent duct 5, wherein piston is connected with an end of T type screw rod 3, and can in cylinder, move vertically, pressure efferent duct 5 is positioned at the end of cylinder, and it is connected with pressure converter KBY with tested table signal input part respectively by three-way pipe.The course of work of this pressure signal generator is such, and promptly during turning handle 4, screw rod 3 changes thereupon, promotes piston 2 and moves axially, and the volume in the cylinder is changed, and pressure also servo-actuated changes, and by efferent duct 5 outputs.
Referring to Fig. 3, supply convertor CDH is made of power transformer TB, rectifier bridge DI, wave filter LB, voltage stabilizer WE, DC/DC transducer, battery pack DC etc.Wherein DC/DC input 5V.DC exports 24V.DC, for KBY, PLC, WC, WCA etc.; WE1 exports 10V.DC, for WE3～WE5 and DC; 24V.DC is for tested table BPD in WE2 output; WE3 and WE5 output 5V.DC are for CRT1 and CRT2; WE4 is for DC/DC transducer 5V.DC.
Front panel of the present utility model is provided with CRT1, CRT2, LK, LKS, SGK, PFX handle, KBY zero potentiometer and PLC zero potentiometer etc.; Rear panel is provided with: I/O line bank, 24V.DC line bank, AC power insert and safety box, 24V.DC safety box, DC power supply switch, CRT2 power switch etc.
Principle of work of the present utility model is such:
Send pressure signal by PFX, send BPD and KBY respectively.Voltage signal after the KBY conversion process is divided into two-way, and one the tunnel send CRT1 to show the input pressure value of BPD, and the input end of WC is sent on another road; Pressure signal is after the DPD conversion process, output 0～10mA or 4～20mA current signal input LK, LK send LKS with 0～10mA, 4～20mA send PLC, export 0～10mA after the PLC conversion and send LKS, the output of LKS is through the RSP conversion, and CRT7 shows through the SGK input, and its indicating value is the force value of tested table output.Another input end of WC is also sent in the output of RSP.WC receives the output signal of KBY and RSP, and after calculation process, the output difference signal send WCA and SG3K respectively.After WCA receives the output of WC, in module with the error setting value relatively, send the error light warning that transfinites.SGK receives the output signal of BPD, WC, RSP, and it is selected output envelope CRT2, shows output and the error of BPD with different display modes.
The utility model can have following characteristics owing to adopt said structure:
1, integral structure
It integrates pressure and differential pressure meter is examined and determine required instrument and equipment. Volume is little (275 * 218 * 100), (about 3Kg) in light weight, Portable machine box.
2, the input/output signal unification shows with pressure unit, and this method has following advantage:
(1) being convenient to input/output signal compares;
(2) must not calculate I/O corresponding relation value;
(3) each calibrating point setting pressure signal value does not have strict demand;
(4) can improve calibrating work efficiency and calibrating quality.
3, error directly shows
Error directly shows, can rapidly, accurately understand each inspection of tested table and walk a little error amount, saves time, saving of labor, raising examine and determine efficient.
4, error overload alarm
Can in verification process, know immediately whether each calibrating point of tested table is overproof.This method can improve calibrating efficient.
5, input/output signal and error direct digital display make reading easy and simple to handle, rapid, accurate.
6, provide 24V.DC power supply for tested table
7, rotating type manual pressure signal generator
Rotate same handle, both can produce negative pressure signal, also can produce the malleation signal, go back the size of adjustable pressure signal, operate very easy.
8, have battery pack in the calibrating instrument
The utility model is specially adapted to the calibrating of the online instrument and meter for automation of production run and the fault diagnosis of on-line automaticization system.
9, it is selective that tested table output signal has three kinds of display modes such as current value demonstration, force value demonstration and error amount demonstration.
Claims (2)
1, a kind of integrative digit type pressure and differential pressure meter calibrating instrument, by pressure signal generator PFX, diffused-silicon pressure transducer KBY, current signal range converter PLC, current signal range switch LK, pressure range switch LKS, resistor chain RSP, display mode selector switch SGK, error-detecting transducer WC, error alarm CWA, input and output display CRT1 and CRT2, battery pack CD, compositions such as supply convertor DC11 and Instrument shell and panel is characterized in that the output terminal of PFX divides two-way to be connected to tested table BPD and KBY input end respectively, KBY output shows that by CRT1 its displayed value is tested table input pressure value; The signal output part of BPD is connected to Output Display Unit CRT2 through LK, LKS, RSP and SGK after range conversion, export the force value of the tested signal of 0～10mA by it, or directly behind SGK, meet CRT2, show current value, or behind LK, PLC, LKS, RSP and SGK, be connected to Output Display Unit CRT2, show the force value of the tested signal of 4～20mA by it; The output terminal of pressure converter KBY and RSP also has been connected to error-detecting transducer WC, and a road of WC output shows tested Watch Error value through SGK by CRT2; WCA is transported on another road, controls it and carries out the error warning, and supply convertor CDH provides stable working power to other circuit.
2, integrative digit type pressure according to claim 1 and differential pressure meter calibrating instrument, it is characterized in that pressure signal generator PFX is by cylinder (1), piston (2), T type screw rod (3), handle (4) and pressure efferent duct (5) constitute, piston (2) is connected with an end of T type screw rod (3) and can moves vertically in cylinder, and pressure efferent duct (5) is connected with diffused-silicon pressure transducer KBY signal input part with tested table signal input part respectively after connecting three-way pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94229870 CN2230924Y (en) | 1994-11-19 | 1994-11-19 | Integrated digital pressure and pressure difference meter checking instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94229870 CN2230924Y (en) | 1994-11-19 | 1994-11-19 | Integrated digital pressure and pressure difference meter checking instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2230924Y true CN2230924Y (en) | 1996-07-10 |
Family
ID=33842103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94229870 Expired - Fee Related CN2230924Y (en) | 1994-11-19 | 1994-11-19 | Integrated digital pressure and pressure difference meter checking instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2230924Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325891C (en) * | 2003-07-21 | 2007-07-11 | 陕西帅克传感仪器制造有限公司 | Full-automatic accurate pressure testing control instrument |
| CN102455237A (en) * | 2010-11-01 | 2012-05-16 | 南车洛阳机车有限公司 | Digital display pressure gauge test bench |
| CN111174971A (en) * | 2019-11-26 | 2020-05-19 | 苏州纳芯微电子股份有限公司 | Detection assembly and pressure sensor calibration equipment |
-
1994
- 1994-11-19 CN CN 94229870 patent/CN2230924Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325891C (en) * | 2003-07-21 | 2007-07-11 | 陕西帅克传感仪器制造有限公司 | Full-automatic accurate pressure testing control instrument |
| CN102455237A (en) * | 2010-11-01 | 2012-05-16 | 南车洛阳机车有限公司 | Digital display pressure gauge test bench |
| CN111174971A (en) * | 2019-11-26 | 2020-05-19 | 苏州纳芯微电子股份有限公司 | Detection assembly and pressure sensor calibration equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |