CN204730958U - NTC temperature sensor thermal time constant proving installation - Google Patents
NTC temperature sensor thermal time constant proving installation Download PDFInfo
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- CN204730958U CN204730958U CN201520278030.9U CN201520278030U CN204730958U CN 204730958 U CN204730958 U CN 204730958U CN 201520278030 U CN201520278030 U CN 201520278030U CN 204730958 U CN204730958 U CN 204730958U
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- time constant
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Abstract
A kind of NTC temperature sensor thermal time constant proving installation, comprises a power supply; One multiselect switch; One data collecting card; One the one ECU; One the 2nd ECU; One display; The first end of multiselect switch is connected with power electric, and its second end is connected to NTC temperature sensor one end to be measured, NTC temperature sensor other end ground connection to be measured; The first input end of data collecting card is electrically connected with the first end of multiselect switch, and its second input end is electrically connected with the second end of multiselect switch; First output terminal of data collecting card is electrically connected with the first end of an ECU, and second end of an ECU is electrically connected with the 3rd end of multiselect switch; Second output terminal of data collecting card is electrically connected with the first end of the 2nd ECU, and second end of the 2nd ECU is electrically connected with display.The utility model can ensure the degree of accuracy of image data, and automatically calculate the 2nd ECU that the second output voltage values processes and judge to provide conclusion, the measuring error that can reduce thermal time constant reaches accurate measurement.
Description
Technical field
The utility model relates to temperature sensor thermal time constant technical field of measurement and test, particularly a kind of NTC temperature sensor thermal time constant proving installation.
Background technology
Thermal time constant weighs the important parameter of temperature sensor reaction velocity, thermal time constant is defined as: under zero-power conditions, when temperature jump, the temperature variation of thermistor for its initial with final temperature difference 63.2% needed for time, such as temperature is from T
0sudden change is to T
1thermal time constant be from T
0change to T
2the required time, wherein T
2=63.2%* (T
0-T
1)+T
1, because its reaction time is fast, existing detection mode is difficult to accurately measure thermal time constant, automatically can't measure so far to thermistor thermal time constant, can not carry out recording to measuring process dynamic data and analyze.
Utility model content
Can not carry out recording to measuring process dynamic data for solving existing NTC temperature sensor thermal time constant method of testing and analyze and the inaccurate problem of measurement result, be necessary to provide a kind of NTC temperature sensor thermal time constant proving installation.
A kind of NTC temperature sensor thermal time constant proving installation, described NTC temperature sensor thermal time constant proving installation comprises a power supply for powering for NTC temperature sensor thermal time constant proving installation; The multiselect switch that one resistance value is adjustable; One for Real-time Collection first output voltage values, the second output voltage values, and the first output voltage values is sent to an ECU, the second output voltage values is sent to the data collecting card of the 2nd ECU; One for the ECU according to the first output voltage values adjustment multiselect switch resistance; One for calculating the 2nd ECU of thermal time constant according to the second output voltage values; One for showing the display of the 2nd ECU processing procedure and result;
The first end of multiselect switch is connected with power electric, and its second end is connected to NTC temperature sensor one end to be measured, NTC temperature sensor other end ground connection to be measured; The first input end of data collecting card is electrically connected with the first end of multiselect switch, and its second input end is electrically connected with the second end of multiselect switch;
First output terminal of data collecting card is electrically connected with the first end of an ECU, and second end of an ECU is electrically connected with the 3rd end of multiselect switch; Second output terminal of data collecting card is electrically connected with the first end of the 2nd ECU, and second end of the 2nd ECU is electrically connected with display.
The NTC temperature sensor thermal time constant proving installation that the utility model provides, guaranteeing by the electric current in whole loop enough little according to the first output voltage values to carrying out redirect to the resistance value of the multiselect switch sealing in NTC temperature sensor to be measured by an ECU, guaranteeing NTC temperature sensor to be measured and measuring under zero energy.Data collecting card carries out uninterrupted sampling to the second output voltage Value Data, the degree of accuracy of image data can be ensured, automatically calculate the 2nd ECU that the second output voltage values processes and judge to provide conclusion, the measuring error that can reduce thermal time constant reaches accurate measurement.
Accompanying drawing explanation
Fig. 1 is the NTC temperature sensor thermal time constant proving installation structural representation that the utility model embodiment provides;
Fig. 2 is the process flow diagram of the NTC temperature sensor thermal time constant proving installation operation that the utility model embodiment provides.
Embodiment
As shown in Figure 1, the utility model embodiment provides a kind of NTC temperature sensor thermal time constant proving installation, and described NTC temperature sensor thermal time constant proving installation comprises a power supply 1 for powering for NTC temperature sensor thermal time constant proving installation; The multiselect switch 2 that one resistance value is adjustable; One for Real-time Collection first output voltage values, the second output voltage values, and the first output voltage values is sent to an ECU4, the second output voltage values is sent to the data collecting card 3 of the 2nd ECU5; One for the ECU4 according to the first output voltage values adjustment multiselect switch 2 resistance value; One for calculating the 2nd ECU5 of thermal time constant according to the second output voltage values; One for showing the display 6 of the 2nd ECU5 processing procedure and result.
The first end of multiselect switch 2 is electrically connected with power supply 1, and its second end is connected to NTC temperature sensor 7 one end to be measured, NTC temperature sensor 7 other end ground connection to be measured; The first input end of data collecting card 3 is electrically connected with the first end of multiselect switch 2, and its second input end is electrically connected with the second end of multiselect switch 2.
First output terminal of data collecting card 3 is electrically connected with the first end of an ECU4, and second end of an ECU4 is electrically connected with the 3rd end of multiselect switch 2; Second output terminal of data collecting card 3 is electrically connected with the first end of the 2nd ECU5, and second end of the 2nd ECU5 is electrically connected with display 6.
Alternatively, multiselect switch 2 comprises multiple on & off switch 21 and and resistance 22 (R that resistance value different equal from & off switch 21 quantity
l); Each on & off switch 21 one end is connected in series with one end of a resistance 22 respectively, all on & off switch 21 other ends first end as multiselect switch in parallel, the other end second end as multiselect switch 2 in parallel of all resistance 22.
Alternatively, described on & off switch 21 is 8 with the quantity of resistance 22.
As shown in Figure 2, the process flow diagram that the NTC temperature sensor thermal time constant proving installation that the utility model embodiment provides runs, comprises the steps:
S1, to measure in NTC temperature sensor 7 to be measured thermistor NTC at temperature T
0, T
1, T
2under resistance value R
t0, R
t1and R
t2: NTC temperature sensor 7 to be measured is by T
0sudden change is to T
1, wherein T
0for the initial temperature of thermistor in NTC temperature sensor, T
1for the finishing temperature of thermistor, T
2for thermal time constant definition temperature spot, T
2=63.2%* (T
0-T
1)+T
1.
S22, by R
t0, R
t1and R
t2value be sent to an ECU4, an ECU4 stores this data encasement and calculates.
S3, acquisition thermistor NTC power P: connect first via resistance 22R in multiselect switch 2
l, calculate P=UI=I
2* R
nTC=[5/ (R
l+ R
nTC)]
2* R
nTC.
S4, selected R
l: by P and NTC rated power P
0compare, must ensure at T
0, T
1, T
2p≤P under temperature conditions
0, an ECU4 calculating rear control multiselect switch 2 carries out resistance 22 and selects, first via resistance 22R
lthe on & off switch 21 that undesirable then disconnection first via resistance 22 is corresponding, connects the second road resistance 22R
l, carry out successively, determine R
lp≤P can be met
0.
S5, calculating V
t0, V
t1, V
t2: selected R
lrear 2nd ECU5 calculates thermistor NTC at T respectively according to voltage division formulas
0, T
1, T
2partial pressure value under temperature conditions.V
NTC＝5*R
NTC/(R
NTC+R
L)。
S6, to judge V
nTCsample, by thermistor NTC as T
0under environment, the magnitude of voltage V of data collecting card 3 couples of thermistor NTC
nTCcarry out sampling and input the 2nd ECU5 and calculate, as the V that continuous several times sampling calculating mean value obtains
t0 '=calculated value V
t0time, can start to measure, the 2nd ECU5 also starts to record data, and thermistor NTC is transformed into T suddenly
1under environment, and at T
1keep stable under environment, the 2nd ECU5 calculates V
t1 '=calculated value V
t1time, test process terminates, and the data collected all are injected the 2nd ECU5 and carried out processing, calculate, store by data collecting card 3 in this process.
S7, curve: the data that data collecting card 3 in whole test process collects by the 2nd ECU5 carry out calculating and drawing voltage change curve.
S8, determine flex point and V
t2point: the 2nd ECU5 is to V in whole test process
nTCcarry out calculating and contrast with image data the last period, working as V
nTC> (1+X%) * V
t1time, determine that this point is the initial change point of temperature, the 2nd ECU5 is vertical direction line on this point curve, next finds V
t2point, curve is found magnitude of voltage V
nTC=V
t2point and rule in this vertical direction.
S9, calculating △ t, and export △ t and curve: △ t changes to V by flex point
t2the time of point.Because sampling has frequency, the 2nd ECU5 records flex point and changes to V
t2the sampled data number of point calculates this process time △ t.Export △ t and curve: process data set curve outputs on display 6 by the 2nd ECU5.Wherein thermal time constant ζ: directly reading reads thermal time constant ζ=△ t.
The software module that the method described in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in random access memory, internal memory, ROM (read-only memory), electrically programmable ROM, electricity can sassafras except any other forms of storage medium known in programming ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
Be understandable that, for the person of ordinary skill of the art, other various corresponding change and distortion can be made according to technical conceive of the present utility model, and all these change the protection domain that all should belong to the utility model claim with distortion.
Claims (3)
1. a NTC temperature sensor thermal time constant proving installation, is characterized in that, described NTC temperature sensor thermal time constant proving installation comprises a power supply for powering for NTC temperature sensor thermal time constant proving installation; The multiselect switch that one resistance value is adjustable; One for Real-time Collection first output voltage values, the second output voltage values, and the first output voltage values is sent to an ECU, the second output voltage values is sent to the data collecting card of the 2nd ECU; One for the ECU according to the first output voltage values adjustment multiselect switch resistance; One for calculating the 2nd ECU of thermal time constant according to the second output voltage values; One for showing the display of the 2nd ECU processing procedure and result;
The first end of multiselect switch is connected with power electric, and its second end is connected to NTC temperature sensor one end to be measured, NTC temperature sensor other end ground connection to be measured; The first input end of data collecting card is electrically connected with the first end of multiselect switch, and its second input end is electrically connected with the second end of multiselect switch;
First output terminal of data collecting card is electrically connected with the first end of an ECU, and second end of an ECU is electrically connected with the 3rd end of multiselect switch; Second output terminal of data collecting card is electrically connected with the first end of the 2nd ECU, and second end of the 2nd ECU is electrically connected with display.
2. NTC temperature sensor thermal time constant proving installation as claimed in claim 1, it is characterized in that, multiselect switch comprises multiple on & off switch and equal from & off switch quantity and that resistance value is different resistance; Each on & off switch one end is connected in series with one end of a resistance respectively, all on & off switch other ends first end as multiselect switch in parallel, the other end second end as multiselect switch in parallel of all resistance.
3. NTC temperature sensor thermal time constant proving installation as claimed in claim 2, it is characterized in that, the quantity of described on & off switch and resistance is 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520278030.9U CN204730958U (en) | 2015-04-29 | 2015-04-29 | NTC temperature sensor thermal time constant proving installation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520278030.9U CN204730958U (en) | 2015-04-29 | 2015-04-29 | NTC temperature sensor thermal time constant proving installation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403329A (en) * | 2015-11-03 | 2016-03-16 | 中北大学 | Response time calibration device of temperature sensor |
| CN107976265A (en) * | 2017-11-27 | 2018-05-01 | 天津航空机电有限公司 | A kind of time constant test system and method for temperature sensor |
| CN109443601A (en) * | 2018-12-24 | 2019-03-08 | 太原理工大学 | High-precision multipoint temperature measuring system and temperature correction method based on thermal resistance |
| CN110231108A (en) * | 2018-03-05 | 2019-09-13 | 联合汽车电子有限公司 | The caliberating device and scaling method of temperature sensor |
| CN111565625A (en) * | 2017-12-26 | 2020-08-21 | 罗伯特·博世有限公司 | System and method for detecting thickness of layer |
-
2015
- 2015-04-29 CN CN201520278030.9U patent/CN204730958U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403329A (en) * | 2015-11-03 | 2016-03-16 | 中北大学 | Response time calibration device of temperature sensor |
| CN105403329B (en) * | 2015-11-03 | 2017-11-14 | 中北大学 | A kind of response time caliberating device of temperature sensor |
| CN107976265A (en) * | 2017-11-27 | 2018-05-01 | 天津航空机电有限公司 | A kind of time constant test system and method for temperature sensor |
| CN111565625A (en) * | 2017-12-26 | 2020-08-21 | 罗伯特·博世有限公司 | System and method for detecting thickness of layer |
| CN111565625B (en) * | 2017-12-26 | 2024-03-26 | 罗伯特·博世有限公司 | System and method for detecting thickness of layer |
| CN110231108A (en) * | 2018-03-05 | 2019-09-13 | 联合汽车电子有限公司 | The caliberating device and scaling method of temperature sensor |
| CN109443601A (en) * | 2018-12-24 | 2019-03-08 | 太原理工大学 | High-precision multipoint temperature measuring system and temperature correction method based on thermal resistance |
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