Summary of the invention
The objective of the invention is; For fear of resistor-type temperature sensor on the hydrogen cylinder is carried out in the verification process it being pulled down at every turn; Test with nitrogen replacement thereby cause needing to carry out complicated air-tight test, propose a kind of hydrogen cylinder exempting to open and inspect and decide device and method with the resistor-type temperature sensor to hydrogen cylinder.
Technical scheme is, a kind of hydrogen cylinder is exempted to open and inspect and decided device with the resistor-type temperature sensor, it is characterized in that said device comprises power switch, stabilized voltage supply, adjustable precision resistance, first precision resistance, second precision resistance and the resistor-type temperature sensor of having demarcated;
Said adjustable precision resistance and hydrogen cylinder connect into electric bridge with resistor-type temperature sensor, the resistor-type temperature sensor of having demarcated, first precision resistance, second precision resistance, specifically:
Said first precision resistance links to each other with second precision resistance with the resistor-type temperature sensor of having demarcated respectively;
Said second precision resistance links to each other with adjustable precision resistance with first precision resistance respectively;
Said adjustable precision resistance links to each other with second precision resistance with the resistor-type temperature sensor with hydrogen cylinder respectively;
Said hydrogen cylinder links to each other with adjustable precision resistance with the resistor-type temperature sensor of having demarcated respectively with the resistor-type temperature sensor;
One end of said power switch connects the junction of first precision resistance and the resistor-type temperature sensor demarcated; The other end connects the positive pole of stabilized voltage supply;
The positive pole of said stabilized voltage supply is connected in power switch; The negative pole of stabilized voltage supply is connected in the junction of second precision resistance and adjustable precision resistance;
Said first precision resistance is identical with the resistance value of second precision resistance;
The said resistor-type temperature sensor of having demarcated is identical with resistor-type temperature sensor model with hydrogen cylinder.
Said resistor-type temperature sensor of having demarcated and hydrogen cylinder use the resistor-type temperature sensor all to be PT100 type temperature sensor, all have two resistance output terminals.
The resistance of said first precision resistance and second precision resistance is 100 ohm, and precision is 0.1%.
Said adjustable precision resistance is the magnetic disc type adjustable resistance, and adjustable Standard resistance range is 0~100 ohm, and precision is 0.1%.
Said stabilized voltage supply is the 5V stabilized voltage supply.
A kind of hydrogen cylinder exempts to open and inspect the method for deciding with the resistor-type temperature sensor, it is characterized in that said method comprises:
Step 1: carry out device and connect, adjustable precision resistance and hydrogen cylinder are connected into electric bridge with resistor-type temperature sensor, the resistor-type temperature sensor of having demarcated, first precision resistance, second precision resistance;
Step 2: make hydrogen cylinder be in the first room temperature T with resistor-type temperature sensor and the resistor-type temperature sensor demarcated
1Descend and left standstill 1~3 minute;
Step 3: turn on the power switch, regulate adjustable precision resistance and make bridge balance, the resistance of record adjustable precision resistance this moment is designated as R '
0
Step 4: compare R '
0With 0 difference, if R '
0With 0 difference greater than first setting threshold, then skip to step 10;
Step 5: the resistor-type temperature sensor that will demarcate places temperature control box, and temperature control box is warming up to the second room temperature T
2, left standstill 1~3 minute;
Step 6:, calculate from T according to original calibration coefficient of hydrogen cylinder with the resistor-type temperature sensor
1Be warmed up to T
2Hydrogen cylinder is designated as Δ R ' with the change in resistance value of resistor-type temperature sensor in the process
2
Step 7: regulate adjustable precision resistance and make electric bridge balance once more, measure and write down the change in resistance value of adjustable precision resistance, be designated as Δ R '
0
Step 8: compare Δ R '
2With Δ R '
0Difference, if Δ R '
2With Δ R '
0The absolute value of difference greater than second setting threshold, then execution in step 9; Otherwise, execution in step 10;
Step 9: hydrogen cylinder does not need to demarcate again with the resistor-type temperature sensor;
Step 10: hydrogen cylinder needs to demarcate again with the resistor-type temperature sensor.
Effect of the present invention is; Use apparatus and method provided by the invention to carry out the calibrating of hydrogen cylinder with the resistor-type temperature sensor; Avoided all will it being pulled down from the hydrogen cylinder cylinder valve at every turn, and then caused needing hydrogen cylinder is carried out the problem of complicated air-tight test and nitrogen replacement test.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.Should be emphasized that following explanation only is exemplary, rather than in order to limit scope of the present invention and application thereof.
Embodiment 1
Fig. 1 exempting to open and inspect and decide equipment equivalent circuit figure that be hydrogen cylinder with the resistor-type temperature sensor.A kind of hydrogen cylinder provided by the invention is exempted to open and inspect and is decided device with the resistor-type temperature sensor, comprises power switch S, stabilized voltage supply E
0, the adjustable precision resistance R
0, the first precision resistance R
3, the second precision resistance R
4The resistor-type temperature sensor C that has demarcated
1
The adjustable precision resistance R
0With hydrogen cylinder with resistor-type temperature sensor C
2, the resistor-type temperature sensor C that demarcated
1, the first precision resistance R
3, second precision resistance connects into Huygens's electric bridge R
4, concrete connected mode is as shown in Figure 1.The first precision resistance R
3Respectively with the resistor-type temperature sensor C that has demarcated
1With the second precision resistance R
4Link to each other; The second precision resistance R
4Respectively with the first precision resistance R
3With the adjustable precision resistance R
0Link to each other; The adjustable precision resistance R
0Respectively with hydrogen cylinder with resistor-type temperature sensor C
2With the second precision resistance R
4Link to each other; Hydrogen cylinder is with resistor-type temperature sensor C
2Respectively with the resistor-type temperature sensor C that has demarcated
1With the adjustable precision resistance R
0Link to each other; The end of power switch S is connected in the first precision resistance R
3With the resistor-type temperature sensor C that has demarcated
1Junction a, the other end connects stabilized voltage supply E
0Positive pole; Stabilized voltage supply E
0Positive pole be connected in power switch S; Stabilized voltage supply E
0Negative pole be connected in the second precision resistance R
4With the adjustable precision resistance R
0Junction c.
Hydrogen cylinder provided by the invention exempting to open and inspect and decide in the device the first precision resistance R with the resistor-type temperature sensor
3With the second precision resistance R
4Resistance value identical; Particularly, the first precision resistance R
3With the second precision resistance R
4Resistance be 100 ohm, precision is 0.1%.The resistor-type temperature sensor C that has demarcated
1With hydrogen cylinder with resistor-type temperature sensor C
2Model is identical.Particularly, the resistor-type temperature sensor C that has demarcated
1With hydrogen cylinder with resistor-type temperature sensor C
2All be PT100 type temperature sensor, and all have two resistance output terminals, be used for being connected into electric bridge.The adjustable precision resistance R
0Be the magnetic disc type adjustable resistance, adjustable Standard resistance range is 0~100 ohm, and precision is 0.1%.Stabilized voltage supply adopts the 5V stabilized voltage supply.Hydrogen cylinder is with resistor-type temperature sensor C
2Be fixed in hydrogen cylinder cylinder valve place, and process demarcation before being installed on gas cylinder last time.
Embodiment 2
The present invention also provides a kind of aforementioned hydrogen cylinder exempting to open and inspect and decide device and carry out hydrogen cylinder and exempt to open and inspect fixed method with the resistor-type temperature sensor with the resistor-type temperature sensor of using.Fig. 2 is a hydrogen cylinder with the exempting to open and inspect and decide method flow diagram of resistor-type temperature sensor, and its process comprises:
Step 1: carry out device and connect, with the adjustable precision resistance R
0With hydrogen cylinder with resistor-type temperature sensor C
2, the resistor-type temperature sensor C that demarcated
1, the first precision resistance R
3, the second precision resistance R
4Connect into Huygens's electric bridge as shown in Figure 1, and, be connected into power switch S, stabilized voltage supply E according to shown in Figure 1
0
Step 2: make hydrogen cylinder with resistor-type temperature sensor C
2The resistor-type temperature sensor C that has demarcated
1Be in the first room temperature T
1Following, and left standstill 1~3 minute.
Step 3: turn on the power switch S, regulate the adjustable precision resistance R
0Make bridge balance, make that promptly the voltage difference at electric bridge b, d two places is 0.The resistance of record adjustable precision resistance this moment is designated as R '
0
The voltage of setting stabilized voltage supply is U
0, the resistor-type temperature sensor C that has demarcated
1Resistance be R '
1, hydrogen cylinder is with resistor-type temperature sensor C
2Resistance be R '
2, the first precision resistance R
3Resistance be R '
3, the second precision resistance R
4Resistance be R '
4, according to Huygens's electric bridge law, the voltage difference U at electric bridge b, d two places
xFor:
Desire to make the voltage difference U at electric bridge b, d two places
x=0, should make
And because the first precision resistance R
3Resistance R '
3With the second precision resistance R
4Resistance R '
4Equate, i.e. R '
3=R '
4, then R ' should be arranged
1=R '
2+ R '
0Again because the resistor-type temperature sensor C that has demarcated
1With hydrogen cylinder with resistor-type temperature sensor C
2Model is identical, and R ' is then arranged
1=R '
2Thereby can know R '
0Be 0 o'clock, the voltage difference at electric bridge b, d two places is 0.
Step 4: compare R '
0With 0 difference, if R '
0With 0 difference greater than first setting threshold, then skip to step 10.
Consider systematic error, can set first threshold, be i.e. a very little numerical value.Regulate the adjustable precision resistance R
0Resistance, when the voltage difference at electric bridge b, d two places is 0, the adjustable precision resistance R
0Resistance R '
0During less than the setting first threshold, then can assert and measure effectively, need carry out next step measurement.But, if when the voltage difference at electric bridge b, d two places is 0, the adjustable precision resistance R
0Resistance R '
0Beyond first setting threshold (promptly greater than first setting threshold), explain that then hydrogen cylinder is with resistor-type temperature sensor C
2Resistance R '
2Inaccurate, need calibrating again.
Step 5: the resistor-type temperature sensor C that will demarcate
1Place temperature control box, temperature control box is warming up to the second room temperature T
2, left standstill 1~3 minute.
The resistor-type temperature sensor C that has demarcated
1Place before the temperature control box, its resistance is R '
1The resistor-type temperature sensor C that has demarcated
1Place temperature control box, temperature control box is warming up to the second room temperature T
2, leave standstill 1~3 minute after, its resistance is R '
1+ Δ R '
1At this moment, temperature-resistant in the hydrogen cylinder, hydrogen cylinder is with resistor-type temperature sensor C
2Resistance still be R '
2
Step 6:, calculate from T according to original calibration coefficient of hydrogen cylinder with the resistor-type temperature sensor
1Be warmed up to T
2Hydrogen cylinder is designated as Δ R ' with the change in resistance value of resistor-type temperature sensor in the process
2
Step 7: regulate adjustable precision resistance and make electric bridge balance once more, measure and write down the change in resistance value of adjustable precision resistance, be designated as Δ R '
0
Because the resistor-type temperature sensor C that has demarcated
1Place temperature control box and be warming up to the second room temperature T
2, leave standstill 1~3 minute after, its resistance is R '
1+ Δ R '
1The voltage difference at electric bridge b, d two places changes at this moment, no longer is 0.Regulate the adjustable precision resistance R
0Make electric bridge balance once more, even the voltage difference at electric bridge b, d two places is 0 once more.At this moment, adjustable precision resistance R
0Resistance by R '
0Become R '
0+ Δ R '
0So, R ' is arranged according to Huygens's electric bridge law
1+ Δ R '
1=R '
2+ R '
0+ Δ R '
0, further have: Δ R '
1=Δ R '
0The resistor-type temperature sensor C that has promptly demarcated
1From the first room temperature T
1Be warming up to the second room temperature T
2, its resistance change amount Δ R '
1Size, by electric bridge once more during balance, the adjustable precision resistance R
0Change in resistance amount Δ R '
0Sign.If hydrogen cylinder is with resistor-type temperature sensor C
2Do not need to demarcate again, then its original calibration coefficient is still true and reliable, then along with variation of temperature, and the increased resistance value Δ R ' that calculates according to original calibration coefficient
2Should with Δ R '
1Identical, the taking into account system error also is Δ R '
2Should with Δ R '
0Basic identical.
Step 8: compare Δ R '
2With Δ R '
0Difference, if Δ R '
2With Δ R '
0The absolute value of difference greater than second setting threshold, then execution in step 9; Otherwise, execution in step 10.
Step 9: hydrogen cylinder does not need to demarcate again with the resistor-type temperature sensor.
Step 10: hydrogen cylinder needs to demarcate again with the resistor-type temperature sensor.
Embodiment 3
Present embodiment specifies under the real room temperature environment after providing first setting threshold and second setting threshold, and hydrogen cylinder exempts to open and inspect the method for deciding with the resistor-type temperature sensor.We set first setting threshold earlier is 0.1 ohm, and second setting threshold is 0.15 ohm.
Step 101: connect according to the device that carries out shown in Figure 1.
Step 102: make hydrogen cylinder with resistor-type temperature sensor C
2The resistor-type temperature sensor C that has demarcated
1Be under 24.9 ℃ of first room temperatures, and left standstill 1~3 minute.
Step 3: turn on the power switch S, regulate the adjustable precision resistance R
0Make bridge balance, make that promptly the voltage difference at electric bridge b, d two places is 0.Record adjustable precision resistance R this moment
0Resistance R '
0=0.08 ohm.
Step 104: compare R '
0With 0 difference.Because this moment R '
0With 0 difference be 0.08 ohm, less than 0.1 ohm of first setting threshold, so order is carried out the next procedure of flow process, i.e. step 105.
Step 105: the resistor-type temperature sensor C that will demarcate
1Place temperature control box, temperature control box is warming up to 30 ℃ of second room temperatures, left standstill 1~3 minute.
Step 106: according to hydrogen cylinder with resistor-type temperature sensor C
2Original calibration coefficient, calculate and be warmed up to 30 ℃ of processes hydrogen cylinder from 24.9 ℃ with resistor-type temperature sensor C
2Change in resistance value Δ R '
2Model is that the hydrogen cylinder of PT100 is with resistor-type temperature sensor C
2The changing value that calculates according to original calibration coefficient of resistance be 1.94 ohm.
Step 107: regulate the adjustable precision resistance R
0Make electric bridge balance once more, even the voltage difference at electric bridge b, d two places is 0 once more.Measure and record adjustable precision resistance R
0Change in resistance value Δ R '
0, its result is 2.01 ohm.
Step 108: compare Δ R '
2With Δ R '
0Difference.The two difference is 0.07 ohm, is 0.15 ohm less than second setting threshold.Therefore, execution in step 109.
Step 109: hydrogen cylinder does not need to demarcate again with the resistor-type temperature sensor.
Use apparatus and method provided by the invention, avoided resistor-type temperature sensor on the hydrogen cylinder being carried out in the verification process it being pulled down at every turn, thereby needing causing carries out the air-tight test of complicacy and the process of nitrogen replacement test to hydrogen cylinder.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.