CN201828358U - Dismantling-free calibrating device of resistor-type temperature sensor for hydrogen cylinder - Google Patents
Dismantling-free calibrating device of resistor-type temperature sensor for hydrogen cylinder Download PDFInfo
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- CN201828358U CN201828358U CN2010205090251U CN201020509025U CN201828358U CN 201828358 U CN201828358 U CN 201828358U CN 2010205090251 U CN2010205090251 U CN 2010205090251U CN 201020509025 U CN201020509025 U CN 201020509025U CN 201828358 U CN201828358 U CN 201828358U
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- resistor
- temperature sensor
- type temperature
- precision resistance
- resistance
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Abstract
The utility model discloses a dismantling-free calibrating device of a resistor-type temperature sensor for a hydrogen cylinder in the technical fields of sensor measurement and control. The device comprises a power supply switch, a voltage-stabilized power supply, an adjustable precision resistor, a first precision resistor, a second precision resistor and a calibrated resistor-type temperature sensor; and the adjustable precision resistor, the resistor-type temperature sensor for the hydrogen cylinder, the calibrated resistor-type temperature sensor, the first precision resistor and the second precision resistor are connected into an electrical bridge. In the utility model, the problem that the resistor-type temperature sensor for the hydrogen cylinder needs to be dismantled for calibration to further cause complicated air-tightness test and nitrogen displacement test for the hydrogen cylinder is avoided.
Description
Technical field
The utility model belongs to sensor observation and control technology field, relates in particular to a kind of hydrogen cylinder exempting to open and inspect and decide device with the resistor-type temperature sensor.
Background technology
Hydrogen is the main energy source of fuel cell car, so hydrogen cylinder is used very extensive in the fuel cell car technology as the hydrogen storage container.In order to monitor the temperature variations of hydrogen in the bottle, need temperature sensor be set at the cylinder valve place of hydrogen cylinder, wherein Chang Yong temperature sensor is the resistor-type temperature sensor.
In order to guarantee the hydrogen temperature monitoring accuracy, fuel cell car is after every operation a period of time, need examine and determine the resistor-type temperature sensor that is installed on hydrogen cylinder cylinder valve place, judge promptly also whether the resistor-type temperature sensor that is installed on hydrogen cylinder cylinder valve place needs to demarcate again.Because temperature is wayward in the hydrogen cylinder, cause directly to adopt a plurality of temperature mode corresponding that the resistor-type temperature sensor is examined and determine with resistance, therefore need at present the resistor-type temperature sensor is unloaded from cylinder valve in this verification process, this will cause air to enter the hydrogen gas bomb.Hydrogen belongs to inflammable gas, stipulates according to State Standard of the People's Republic of China GB 4962-2008 hydrogen technical regulation safe in utilization: if having air to charge in the use of hydrogen gas bomb, need fill hydrogen again.And before filling hydrogen again, also to carry out the test of air-tight test and nitrogen replacement.Test that not only process of the test is very complicated for these two, and must carry out in the mechanism that possesses the dedicated experiments qualification, especially for integrated good fuel cell car, the time cost of these two tests and human cost are all very high.
Summary of the invention
The purpose of this utility model 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, thereby cause needing to carry out the problem of complicated air-tight test and nitrogen replacement test, propose a kind of hydrogen cylinder exempting to open and inspect and decide device 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 described 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;
Described 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:
Described first precision resistance links to each other with second precision resistance with the resistor-type temperature sensor of having demarcated respectively;
Described second precision resistance links to each other with adjustable precision resistance with first precision resistance respectively;
Described adjustable precision resistance links to each other with second precision resistance with the resistor-type temperature sensor with hydrogen cylinder respectively;
Described 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 described 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 described 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;
Described first precision resistance is identical with the resistance value of second precision resistance;
The described resistor-type temperature sensor of having demarcated is identical with resistor-type temperature sensor model with hydrogen cylinder.
Described resistor-type temperature sensor of having demarcated and hydrogen cylinder all are PT100 type temperature sensor with the resistor-type temperature sensor, all have two resistance output terminals.
The resistance of described first precision resistance and second precision resistance is 100 ohm, and precision is 0.1%.
Described adjustable precision resistance is the magnetic disc type adjustable resistance, and adjustable Standard resistance range is 0～100 ohm, and precision is 0.1%.
Described stabilized voltage supply is the 5V stabilized voltage supply.
Effect of the present utility model is, the device that uses the utility model to provide carries out the calibrating of hydrogen cylinder with the resistor-type temperature sensor, avoided all it to be 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.
Description of drawings
Fig. 1 exempting to open and inspect and decide equipment equivalent circuit figure that be hydrogen cylinder with the resistor-type temperature sensor;
Fig. 2 is to use hydrogen cylinder exempting to open and inspect and decide the method flow diagram that device is examined and determine with the resistor-type temperature sensor.
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 utility model and application thereof.
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 that the utility model provides 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 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 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 resistor-type temperature sensor C
2With the second precision resistance R
4Link to each other; Hydrogen cylinder 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.
The hydrogen cylinder that provides at the utility model is exempted to open and inspect and is decided 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 resistor-type temperature sensor C
2Model is identical.Particularly, the resistor-type temperature sensor C that has demarcated
1With hydrogen cylinder 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 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
Fig. 2 is to use hydrogen cylinder exempting to open and inspect and decide the method flow diagram that device is examined and determine with the resistor-type temperature sensor.Its process comprises:
Step 1: carry out device and connect, with the adjustable precision resistance R
0With hydrogen cylinder 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 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 resistor-type temperature sensor C
2Model is identical, and R ' is then arranged
1=R '
2Thereby R ' as can be known,
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, adjustable precision resistance r
0Resistance R '
0Beyond first setting threshold (promptly greater than first setting threshold), hydrogen cylinder resistor-type temperature sensor C is described then
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 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.
Present embodiment describes in detail under the real room temperature environment after providing first setting threshold and second setting threshold, uses hydrogen cylinder exempting to open and inspect and decide the process that device is examined and determine 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 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 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 the hydrogen cylinder of PT100 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.
The device that uses the utility model to provide has been avoided resistor-type temperature sensor on the hydrogen cylinder being carried out in the verification process it being pulled down at every turn, thereby causes needing hydrogen cylinder is carried out the process of complicated air-tight test and nitrogen replacement test.
The above; it only is the preferable embodiment of the utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.
Claims (5)
1. a hydrogen cylinder is characterized in that described 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 with the exempting to open and inspect and decide device of resistor-type temperature sensor;
Described 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:
Described first precision resistance links to each other with second precision resistance with the resistor-type temperature sensor of having demarcated respectively;
Described second precision resistance links to each other with adjustable precision resistance with first precision resistance respectively;
Described adjustable precision resistance links to each other with second precision resistance with the resistor-type temperature sensor with hydrogen cylinder respectively;
Described 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 described 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 described 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;
Described first precision resistance is identical with the resistance value of second precision resistance;
The described resistor-type temperature sensor of having demarcated is identical with resistor-type temperature sensor model with hydrogen cylinder.
2. a kind of hydrogen cylinder according to claim 1 is exempted to open and inspect and is decided device with the resistor-type temperature sensor, it is characterized in that described resistor-type temperature sensor of having demarcated and hydrogen cylinder all are PT100 type temperature sensor with the resistor-type temperature sensor, all have two resistance output terminals.
3. a kind of hydrogen cylinder according to claim 1 is exempted to open and inspect and is decided device with the resistor-type temperature sensor, it is characterized in that the resistance of described first precision resistance and second precision resistance is 100 ohm, and precision is 0.1%.
4. a kind of hydrogen cylinder according to claim 1 is exempted to open and inspect and is decided device with the resistor-type temperature sensor, it is characterized in that described adjustable precision resistance is the magnetic disc type adjustable resistance, and adjustable Standard resistance range is 0～100 ohm, and precision is 0.1%.
5. a kind of hydrogen cylinder according to claim 1 is exempted to open and inspect and is decided device with the resistor-type temperature sensor, it is characterized in that described stabilized voltage supply is the 5V stabilized voltage supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205090251U CN201828358U (en) | 2010-08-27 | 2010-08-27 | Dismantling-free calibrating device of resistor-type temperature sensor for hydrogen cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205090251U CN201828358U (en) | 2010-08-27 | 2010-08-27 | Dismantling-free calibrating device of resistor-type temperature sensor for hydrogen cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201828358U true CN201828358U (en) | 2011-05-11 |
Family
ID=43966885
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205090251U Expired - Lifetime CN201828358U (en) | 2010-08-27 | 2010-08-27 | Dismantling-free calibrating device of resistor-type temperature sensor for hydrogen cylinder |
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| Country | Link |
|---|---|
| CN (1) | CN201828358U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936788A (en) * | 2010-08-27 | 2011-01-05 | 清华大学 | Disassembly-free calibrating device and method of resistance-type temperature sensor for hydrogen cylinder |
-
2010
- 2010-08-27 CN CN2010205090251U patent/CN201828358U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936788A (en) * | 2010-08-27 | 2011-01-05 | 清华大学 | Disassembly-free calibrating device and method of resistance-type temperature sensor for hydrogen cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110511 Effective date of abandoning: 20130306 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110511 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |