CN105371976A - Thermal resistance temperature measuring device and temperature measuring method - Google Patents
Thermal resistance temperature measuring device and temperature measuring method Download PDFInfo
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- CN105371976A CN105371976A CN201410411270.1A CN201410411270A CN105371976A CN 105371976 A CN105371976 A CN 105371976A CN 201410411270 A CN201410411270 A CN 201410411270A CN 105371976 A CN105371976 A CN 105371976A
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- thermal resistance
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- protective casing
- thermal
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Abstract
The invention provides a thermal resistance temperature measuring device and a temperature measuring method. It is particularly important to control temperature whether in the industrial field or in the daily life. The temperature, a physical quantity showing the hot and cold degree of an object, is closely related to the life of people, industrial and agricultural production and scientific research. The thermal resistance temperature measuring device comprises a thermal resistance wire (1), a resistor body support (2), a lead wire (3), an insulating porcelain tube (4), a protective sleeve pipe (5), a connection flange (6), a conjunction box (7) and a lead wire hole (8). The thermal resistance wire is wound around the resistor body support. The insulating porcelain tube sleeves one end of the resistor body support. The lead wire is arranged at the edge of the resistor body support. The thermal resistance wire, the resistor body support, the lead wire and the insulating porcelain tube are all disposed inside the protective sleeve pipe. The protective sleeve pipe A is connected to the protective sleeve pipe B through the connection flange. The protective sleeve pipe B is provided with the conjunction box. One end of the conjunction box is equipped with the lead wire hole. One end of the conjunction box is connected to a secondary instrument (9). The thermal resistance temperature measuring device is used for measuring the temperature.
Description
technical field:
the present invention relates to a kind of Thermistor Temperature Measurement device and temp measuring method.
background technology:
no matter in industry or in living, control for temperature is all particularly important, temperature is the physical quantity characterizing the cold and hot degree of object, it and human lives, industrial and agricultural production and scientific research close relation, along with scientific and technological level improves constantly, temperature measurement technology is development also, temp measuring method and equipment have with multiple, when using thermocouple measurement less than 500 DEG C temperature in the industry, thermoelectrical potential is little, measuring accuracy is low, and often need in use procedure to carry out cold junction compensation, bring a lot of trouble.
summary of the invention:
the object of this invention is to provide a kind of Thermistor Temperature Measurement device and temp measuring method.
above-mentioned object is realized by following technical scheme:
a kind of Thermistor Temperature Measurement device, its composition comprises: hot water radiation wire, resistive element support, lead-in wire, porcelain tube, protective casing, joint flange, terminal box, fairlead, described hot water radiation wire is wrapped on resistive element support, on described resistive element support one end, cover has porcelain tube, described resistive element bracket lip has lead-in wire, described hot water radiation wire, described resistive element support, described lead-in wire, described porcelain tube is installed in protective casing A, described protective casing A is connected with protective casing B by joint flange, described protective casing B has terminal box, described terminal box one end has fairlead, described terminal box one end is connected with secondary instrument.
the method of the Thermistor Temperature Measurement device thermometric described in utilization, must check its good ring, be extracted out by thermal resistance, measure its resistance with multimeter, if multimeter reading is less than R for " 0 " or multimeter reading from protection tube before first using Thermistor Temperature Measurement device
0
value, then this thermal resistance short circuit, must find out short circuit place reparation; If multimeter reading is " ∞ ", then this thermal resistance open circuit, can not use; If multimeter read-around ratio R
0
resistance more higher, illustrate that this thermal resistance is normal; When the resistance of thermal resistance is incorrect, from bottom end points infall increase and decrease resistance wire, and should should not adjust from other.By resistance wire marshalling, should can not abut against, still in statu quo bandage after mixing up completely.The method of the Thermistor Temperature Measurement device thermometric described in utilization, when secondly thermal resistance is installed, its insertion depth is not less than 8 times ~ 10 times of thermal resistance protection tube external diameter, makes thermal resistance heated portion increase as far as possible.Thermal resistance is at right angle setting as far as possible, in case at high temperature flexural deformation; Thermal resistance in use in order to reduce the error that radiation heat and heat transfer produce, should make as far as possible protective casing surface and measured medium temperature close, the black coefficient of reduction thermal resistance protective casing.The method of described Thermistor Temperature Measurement device thermometric, finally when with the secondary instrument measuring tempeature matched with thermal resistance, thermal resistance is placed in the scene of dut temperature, and secondary instrument is then placed in operation room; If measured with unbalanced bridge, so the wire of connection thermal resistor is all distributed on an arm on bridge road; Owing to generally there being the distance of a section longer between thermal resistance and instrument, therefore two connect the resistance variation with temperature of wire, the change of same thermal resistance resistance are added in together on an arm of unbalanced bridge, make measurement produce larger error.For reducing this error, generally when thermometric thermal resistance and Instrument connection, adopting three-wire system connection, namely drawing three wires from thermal resistance, two of connection thermal resistor wires are just in time in two adjacent brachium pontis respectively.When making conductor resistance value change when variation of ambient temperature, its effect produced just in time cancels each other, and the unbalance voltage that Shi Qiao road exports can not therefore change; The variation of another conductor resistance R1, only has atomic little impact to for bridge voltage, measures accurately.
beneficial effect:
thermistor Temperature Measurement device of the present invention, output signal is large, and temperature measurement accuracy is high, and resistance signal is partial to teletransmission, without the need to carrying out cold junction compensation, can realize multiple spot handover measurement; Because Material selec-tion is platinum, copper, its physics of nickel and stable chemical nature, temperature-coefficient of electrical resistance is large, resistivity is large, and resistance value and temperature linear approximate relationship are measured more accurately and stablized, and repdocutbility is good.
accompanying drawing illustrates:
accompanying drawing 1 is the structural representation of invention.
accompanying drawing 2 is three-wire connection schematic diagram of thermal resistance of the present invention.
embodiment:
embodiment 1:
a kind of Thermistor Temperature Measurement device, its composition comprises: hot water radiation wire 1, resistive element support 2, lead-in wire 3, porcelain tube 4, protective casing 5, joint flange 6, terminal box 7, fairlead 8, described hot water radiation wire is wrapped on resistive element support, on described resistive element support one end, cover has porcelain tube, described resistive element bracket lip has lead-in wire, described hot water radiation wire, described resistive element support, described lead-in wire, described porcelain tube is installed in protective casing A, described protective casing A is connected with protective casing B by joint flange, described protective casing B has terminal box, described terminal box one end has fairlead, described terminal box one end is connected with secondary instrument 9.
embodiment 2:
utilize the method for the Thermistor Temperature Measurement device thermometric described in embodiment 1; first its good ring must be checked before using Thermistor Temperature Measurement device; thermal resistance is extracted out from protection tube, measures its resistance with multimeter, if multimeter reading is less than R for " 0 " or multimeter reading
0
value, then this thermal resistance short circuit, must find out short circuit place reparation; If multimeter reading is " ∞ ", then this thermal resistance open circuit, can not use; If multimeter read-around ratio R
0
resistance more higher, illustrate that this thermal resistance is normal; When the resistance of thermal resistance is incorrect, from bottom end points infall increase and decrease resistance wire, and should should not adjust from other.By resistance wire marshalling, should can not abut against, still in statu quo bandage after mixing up completely.Embodiment 3:
utilize the method for the Thermistor Temperature Measurement device thermometric described in embodiment 1 or 2, when secondly thermal resistance is installed, its insertion depth is not less than 8 times ~ 10 times of thermal resistance protection tube external diameter, makes thermal resistance heated portion increase as far as possible.Thermal resistance is at right angle setting as far as possible, in case at high temperature flexural deformation; Thermal resistance in use in order to reduce the error that radiation heat and heat transfer produce, should make as far as possible protective casing surface and measured medium temperature close, the black coefficient of reduction thermal resistance protective casing.Embodiment 4:
utilize the method for embodiment 1 or the Thermistor Temperature Measurement device thermometric described in 2 or 3, the material selection metallic conductor of temperature-sensing element and semiconductor, in platinum, copper, nickel three, finally when with the secondary instrument measuring tempeature matched with thermal resistance, thermal resistance is placed in the scene of dut temperature, and secondary instrument is then placed in operation room; If measured with unbalanced bridge, so the wire of connection thermal resistor is all distributed on an arm on bridge road; Owing to generally there being the distance of a section longer between thermal resistance and instrument, therefore two connect the resistance variation with temperature of wire, the change of same thermal resistance resistance are added in together on an arm of unbalanced bridge, make measurement produce larger error.For reducing this error, generally when thermometric thermal resistance and Instrument connection, adopting three-wire system connection, namely drawing three wires from thermal resistance, two of connection thermal resistor wires are just in time in two adjacent brachium pontis respectively.When making conductor resistance value change when variation of ambient temperature, its effect produced just in time cancels each other, and the unbalance voltage that Shi Qiao road exports can not therefore change; The variation of another conductor resistance R1, only has atomic little impact to for bridge voltage, measures accurately.
Claims (4)
1. a Thermistor Temperature Measurement device, its composition comprises: hot water radiation wire, resistive element support, lead-in wire, porcelain tube, protective casing, joint flange, terminal box, fairlead, it is characterized in that: described hot water radiation wire is wrapped on resistive element support, on described resistive element support one end, cover has porcelain tube, described resistive element bracket lip has lead-in wire, described hot water radiation wire, described resistive element support, described lead-in wire, described porcelain tube is installed in protective casing A, described protective casing A is connected with protective casing B by joint flange, described protective casing B has terminal box, described terminal box one end has fairlead, described terminal box one end is connected with secondary instrument.
2. one kind utilizes the method for the Thermistor Temperature Measurement device thermometric described in claim 1; it is characterized in that: the good ring that must check it before first using Thermistor Temperature Measurement device; thermal resistance is extracted out from protection tube; its resistance is measured, if multimeter reading is less than R for " 0 " or multimeter reading with multimeter
0value, then this thermal resistance short circuit, must find out short circuit place reparation; If multimeter reading is " ∞ ", then this thermal resistance open circuit, can not use; If multimeter read-around ratio R
0resistance more higher, illustrate that this thermal resistance is normal; When the resistance of thermal resistance is incorrect, from bottom end points infall increase and decrease resistance wire, and from other adjustment, by resistance wire marshalling, should should should can not abut against after mixing up completely, still in statu quo bandage.
3. the method for Thermistor Temperature Measurement device thermometric according to claim 1, it is characterized in that: when secondly thermal resistance is installed, its insertion depth is not less than 8 times ~ 10 times of thermal resistance protection tube external diameter, thermal resistance heated portion is made to increase as far as possible, thermal resistance is at right angle setting as far as possible, in case at high temperature flexural deformation; Thermal resistance in use in order to reduce the error that radiation heat and heat transfer produce, should make as far as possible protective casing surface and measured medium temperature close, the black coefficient of reduction thermal resistance protective casing.
4. the Thermistor Temperature Measurement device according to claim 1 or 2 or 3 and temp measuring method, is characterized in that: finally when with the secondary instrument measuring tempeature matched with thermal resistance, thermal resistance is placed in the scene of dut temperature, and secondary instrument is then placed in operation room, if measured with unbalanced bridge, so the wire of connection thermal resistor is all distributed on an arm on bridge road, owing to generally there being the distance of a section longer between thermal resistance and instrument, therefore two connect the resistance variation with temperature of wire, the change of same thermal resistance resistance is added in together on an arm of unbalanced bridge, measurement is made to produce larger error, for reducing this error, general when thermometric thermal resistance and Instrument connection, adopt three-wire system connection, namely three wires are drawn from thermal resistance, two of connection thermal resistor wires are just in time in respectively in two adjacent brachium pontis, when making conductor resistance value change when variation of ambient temperature, its effect produced just in time cancels each other, the unbalance voltage that Shi Qiao road exports can not therefore change, the variation of another conductor resistance R1, only has atomic little impact to for bridge voltage, measures accurately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410411270.1A CN105371976A (en) | 2014-08-20 | 2014-08-20 | Thermal resistance temperature measuring device and temperature measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410411270.1A CN105371976A (en) | 2014-08-20 | 2014-08-20 | Thermal resistance temperature measuring device and temperature measuring method |
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| Publication Number | Publication Date |
|---|---|
| CN105371976A true CN105371976A (en) | 2016-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410411270.1A Withdrawn CN105371976A (en) | 2014-08-20 | 2014-08-20 | Thermal resistance temperature measuring device and temperature measuring method |
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| CN (1) | CN105371976A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784181A (en) * | 2016-04-21 | 2016-07-20 | 诸琢玉 | Temperature apparatus capable of measuring and controlling linear length and method thereof |
| CN107807145A (en) * | 2016-09-09 | 2018-03-16 | 中核兰州铀浓缩有限公司 | It is a kind of to detect UF without heat source type6The sensor of dielectric gas flow direction |
| CN108955933A (en) * | 2018-08-15 | 2018-12-07 | 四川西南交大铁路发展股份有限公司 | A kind of measuring circuit and parameter selection method improving rail temperature measurement accuracy |
| CN109030929A (en) * | 2018-07-06 | 2018-12-18 | 杰华特微电子（杭州）有限公司 | load insertion detection circuit and method |
| CN109443565A (en) * | 2018-12-18 | 2019-03-08 | 海盐县秦山热工仪表厂 | A kind of anticollision self-protection type thermal resistance |
| CN109974881A (en) * | 2019-03-15 | 2019-07-05 | 上海电仪仪器仪表有限公司 | A kind of thermal resistance thermometer |
| CN109030929B (en) * | 2018-07-06 | 2024-05-24 | 杰华特微电子股份有限公司 | Load insertion detection circuit and method |
-
2014
- 2014-08-20 CN CN201410411270.1A patent/CN105371976A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784181A (en) * | 2016-04-21 | 2016-07-20 | 诸琢玉 | Temperature apparatus capable of measuring and controlling linear length and method thereof |
| CN105784181B (en) * | 2016-04-21 | 2018-04-06 | 诸琢玉 | The temperature device and its method of measurement control line length |
| CN107807145A (en) * | 2016-09-09 | 2018-03-16 | 中核兰州铀浓缩有限公司 | It is a kind of to detect UF without heat source type6The sensor of dielectric gas flow direction |
| CN109030929A (en) * | 2018-07-06 | 2018-12-18 | 杰华特微电子（杭州）有限公司 | load insertion detection circuit and method |
| CN109030929B (en) * | 2018-07-06 | 2024-05-24 | 杰华特微电子股份有限公司 | Load insertion detection circuit and method |
| CN108955933A (en) * | 2018-08-15 | 2018-12-07 | 四川西南交大铁路发展股份有限公司 | A kind of measuring circuit and parameter selection method improving rail temperature measurement accuracy |
| CN109443565A (en) * | 2018-12-18 | 2019-03-08 | 海盐县秦山热工仪表厂 | A kind of anticollision self-protection type thermal resistance |
| CN109974881A (en) * | 2019-03-15 | 2019-07-05 | 上海电仪仪器仪表有限公司 | A kind of thermal resistance thermometer |
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Application publication date: 20160302 |