CN105953938A - Method for measuring temperature of equipment cabinet - Google Patents
Method for measuring temperature of equipment cabinet Download PDFInfo
- Publication number
- CN105953938A CN105953938A CN201610253082.XA CN201610253082A CN105953938A CN 105953938 A CN105953938 A CN 105953938A CN 201610253082 A CN201610253082 A CN 201610253082A CN 105953938 A CN105953938 A CN 105953938A
- Authority
- CN
- China
- Prior art keywords
- temperature
- value
- microprocessor
- obtains
- resistance value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K2219/00—Thermometers with dedicated analog to digital converters
Abstract
The invention relates to a method for measuring the temperature of an equipment cabinet. The method comprises the following steps that a temperature sensor inside the cabinet outputs different resistance values; the resistance values are loaded onto the signal input end of an amplifier and a microprocessor obtains corresponding sampling digital value after amplification; the microprocessor converts the digital value into temperature values corresponding to the resistance values and records in a table the temperature values as known quantity; and the microprocessor, according to the sampled digital values, obtains the actual temperature of the equipment cabinet by means of segmented calibration and linearity calculation. The method may measure the actual temperature inside the equipment cabinet at high precision.
Description
Technical field
The method that the present invention relates to measure temperature, a kind of method measuring housing temperature.
Background technology
Usually, the resistance signal that temperature sensor is exported by microprocessor is sampled, and first sampled value is converted into electricity
Resistance, then reconvert becomes temperature value, then is obtained the actual temperature of cabinet by temperature-resistance linear corresponding relation.But by
Resistance value and temperature in temperature sensor are not strict linear relationship, so it is the highest to measure the temperature accuracy obtained.
Summary of the invention
For problem in prior art, the invention provides a kind of method measuring housing temperature, can measure accurately
Go out temperature actual in cabinet.
The present invention is achieved by the following technical solutions, and the present invention comprises the following steps:
Step one, the resistance value different by the output of temperature in chassis sensor；
Step 2, is added to the signal input part of amplifier by resistance value load, and amplified, microprocessor obtains the sampling of correspondence
Digital value；
Step 3, this digital value is converted into temperature value record corresponding to resistance value in internal form as by microprocessor
The amount of knowing uses；
Step 4, microprocessor, according to sample numerical value, obtains the actual temperature of cabinet by sectional calibration, the calculating linearity.
Described sectional calibration is for carry out by equation below:
T =*,<
Wherein, T represents housing temperature, and x is temperature sensor sampling value to be calibrated, and a, b represent the sampling that microprocessor obtains
Digital value, m, n are the temperature value that resistance value is corresponding.
Described m, n step-length is 10.
There is advantages that the sampled value that microprocessor obtains can be directly translated into temperature by described method
Angle value, simplifies and first sampled value is converted into resistance value, and then reconvert becomes the step of temperature value.
Detailed description of the invention
Below in conjunction with specific embodiment, invention is expanded on further.
The present invention uses sectional calibration, the method calculating the linearity, comprises the following steps:
Step one, is exported different resistance (i, j, k, l etc.) by temperature in chassis sensor；
Step 2, is added to the signal input part of amplifier by resistance value (i, j, k, l etc.) load, and amplified, microprocessor obtains
To corresponding sample numerical value (a, b, c, d etc.)；
Step 3, microprocessor this digital value (a, b, c, d etc.) is converted into temperature value corresponding to resistance value (m, n, o, p etc., this
Sample does and sampled value can be directly translated into temperature value, simplifies and first sampled value is converted into resistance value, then reconvert Cheng Wen
The step of angle value) record uses as known quantity in internal form.As shown in the table:
Step 4, microprocessor, according to sample numerical value, obtains the actual temperature of cabinet by sectional calibration, the calculating linearity.
The step-length of form is 10 degrees Celsius, i.e. p o=o n=n m=10, by above table after calibration
It is stored in microprocessor internal memorizer, tables look-up during use.The computational methods of temperature value are as follows:
Assume that the temperature sensor digital value that microprocessor samples obtains is x, (<)), the calculating of temperature T the most now
Formula is:
T = *
It practice, the resistance signal of temperature sensor output needs to be converted into voltage or the electric current letter that microprocessor can directly be sampled
Number, in the present invention by difference amplifier, such as AD8554(difference amplifier is also changed to other models) convert thereof into
Voltage signal, (ADC is integrated with in microprocessor, and sample frequency can set, the most permissible then to carry out AD sampling by microprocessor
Sampling in every half second is once) and record, then convert back resistance value, therefore sampling and recording obtained by substantially is temperature sensing
The AD sample numerical value of the resistance value of device, is closed by the resistance-temperature linearity stored in searching the memorizer calculating microprocessor
System just can calculate the temperature value of correspondence.
The signal of timing microprocessor monitoring temperature sensor output, by above method, precisely measures out cabinet
The temperature of middle reality.
Claims (3)
1. the method measuring housing temperature, it is characterised in that: comprise the following steps:
Step one, the resistance value different by the output of temperature in chassis sensor；
Step 2, is added to the signal input part of amplifier by resistance value load, and amplified, microprocessor obtains the sampling of correspondence
Digital value；
Step 3, this digital value is converted into temperature value record corresponding to resistance value in internal form as by microprocessor
The amount of knowing uses；
Step 4, microprocessor, according to sample numerical value, obtains the actual temperature of cabinet by sectional calibration, the calculating linearity.
A kind of method measuring housing temperature the most according to claim 1, it is characterised in that: segmentation school described in step 4
Accurate for be carried out by equation below:
T =*,<
Wherein, T represents housing temperature, and x is temperature sensor sampling value to be calibrated, and a, b represent the sampling that microprocessor obtains
Digital value, m, n are the temperature value that resistance value is corresponding.
A kind of method measuring housing temperature the most according to claim 2, it is characterised in that: described m, n step-length is 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610253082.XA CN105953938A (en) | 2016-04-22 | 2016-04-22 | Method for measuring temperature of equipment cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610253082.XA CN105953938A (en) | 2016-04-22 | 2016-04-22 | Method for measuring temperature of equipment cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105953938A true CN105953938A (en) | 2016-09-21 |
Family
ID=56915509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610253082.XA Pending CN105953938A (en) | 2016-04-22 | 2016-04-22 | Method for measuring temperature of equipment cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105953938A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649105A (en) * | 2020-12-26 | 2021-04-13 | 青岛鼎信通讯股份有限公司 | PT100 temperature calibration and measurement method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57179758A (en) * | 1981-04-30 | 1982-11-05 | Fujitsu General Ltd | Method and device for measurement of temperature coefficient of resistance |
| CN88203185U (en) * | 1988-02-22 | 1988-10-05 | 机械委北京机械自动化研究所 | Thermistor linearized device |
| CN102589741A (en) * | 2012-03-14 | 2012-07-18 | 华为终端有限公司 | Method and device for detecting temperature |
| CN103616086A (en) * | 2013-11-19 | 2014-03-05 | 浙江工业大学 | Thermal resistance temperature transmitter |
| WO2014094775A1 (en) * | 2012-12-18 | 2014-06-26 | Miitors Aps | A method for linearization of the output of an analog-to-digital converter and measuring instruments using such method |
-
2016
- 2016-04-22 CN CN201610253082.XA patent/CN105953938A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57179758A (en) * | 1981-04-30 | 1982-11-05 | Fujitsu General Ltd | Method and device for measurement of temperature coefficient of resistance |
| CN88203185U (en) * | 1988-02-22 | 1988-10-05 | 机械委北京机械自动化研究所 | Thermistor linearized device |
| CN102589741A (en) * | 2012-03-14 | 2012-07-18 | 华为终端有限公司 | Method and device for detecting temperature |
| WO2014094775A1 (en) * | 2012-12-18 | 2014-06-26 | Miitors Aps | A method for linearization of the output of an analog-to-digital converter and measuring instruments using such method |
| CN103616086A (en) * | 2013-11-19 | 2014-03-05 | 浙江工业大学 | Thermal resistance temperature transmitter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649105A (en) * | 2020-12-26 | 2021-04-13 | 青岛鼎信通讯股份有限公司 | PT100 temperature calibration and measurement method |
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| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160921 |
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| WD01 | Invention patent application deemed withdrawn after publication |