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Paired Temperature Sensor And Method Of Manufacturing The Same

A technology of temperature sensor and manufacturing method, applied to thermometers, parts of thermometers, thermometers using electric/magnetic elements that are directly sensitive to heat, etc., can solve problems such as changes in temperature and electrical characteristics, the same, inaccurate transmission of information, etc. , to achieve the effect of preventing wrong connection, preventing wrong assembly and improving production efficiency

Inactive Publication Date: 2014-07-16
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, if the pair sensor is attached to the vehicle or the like in a wrong way (for example, attached to an inverted position relative to the catalytic converter), even for the pair of temperature sensors (heat-sensitive elements) in the above pair sensor The electrical properties of temperature are quite the same, and the temperature difference between the two measured objects also becomes inverted, so the information cannot be transmitted accurately
[0008] Also, if the lead wires of the pair temperature sensor are connected to the wrong destination when the pair sensor is connected to the controller side, the temperature between the two measured objects will The difference also becomes inverted, so the information cannot be transmitted accurately
[0009] Also, if the electrical characteristics for the temperature of the pair of temperature sensors (thermal elements) in the pair temperature sensor are significantly different, it is impossible to accurately measure the temperature difference between the two measured objects of the pair temperature sensor
[0010] On the other hand, the electrical characteristics with respect to the temperature in the thermal element may vary due to manufacturing variations
[0011] That is to say, it is difficult to make the electrical characteristics with respect to temperature exactly the same, and for example, two thermosensitive elements selected at random will output different output values ​​for the same temperature
[0012] However, there arises such a problem that if a large difference occurs between the electrical characteristics of the thermosensitive elements in the two temperature sensors constituting a single pair temperature sensor, as described above, the two measurement objects cannot be accurately measured temperature difference between
[0013] Therefore, for example, the temperature difference between the upstream side and the downstream side of the catalytic converter may not be accurately measured, and thus, accurate determination of catalyst decay becomes difficult
[0014] In addition, although it is conceivable to assume that there is a difference in electrical characteristics below a predetermined value of the pair of temperature sensors with thermal elements, it is impossible to increase the finished product after inspecting the entire pair of temperature sensors after manufacture. Yield and difficult to obtain high production efficiency
[0015] Also, if the lead wires of the pair temperature sensor are attached to a single connector, the lead wires are connected to the wrong position, the temperature difference between the two measured objects similarly becomes reversed, and thus the information cannot be transmitted accurately

Method used

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  • Paired Temperature Sensor And Method Of Manufacturing The Same
  • Paired Temperature Sensor And Method Of Manufacturing The Same
  • Paired Temperature Sensor And Method Of Manufacturing The Same

Examples

Experimental program
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no. 1 example

[0061] Such as figure 1 and figure 2 As shown, the method of manufacturing a pair temperature sensor is a method of manufacturing an integrally combined pair temperature sensor 1 by connecting two temperature sensors 2 to a single connector 3 via lead wires 22 .

[0062] Such as figure 2 As shown, in each temperature sensor 2 there is a thermosensitive element 21 which changes its electrical characteristics according to temperature and a pair of lead wires 22 .

[0063] A method of manufacturing a pair temperature sensor has an element manufacturing step, a sorting step, a selecting step, and an assembling step.

[0064] In the element manufacturing step, a plurality of thermosensitive elements 21 are manufactured.

[0065] In the classifying step, the plurality of thermosensitive elements 21 are classified into a plurality of classes by differences in electrical characteristics for a given temperature.

[0066] In the selection step, two heat-sensitive elements 21 are r...

no. 2 example

[0153] Such as Figure 4 As shown, the current embodiment is an example in which, for each of two different given temperatures T1, T2, a plurality of heat-sensitive elements 21 are divided into more than four in the classification step according to the difference in combination of electrical characteristics. categories.

[0154] That is, in the classification step, for each of the plurality of thermosensitive elements 21 , the resistance R1n for a given temperature T1 and the resistance value R2n for another given temperature T2 are measured.

[0155] Then, any heat-sensitive element 21 matching any one of R1n>Rmax, Rmin>R1n, R2n>Rmax, or Rmin>R2n is treated as non-standard, and is not adopted as a product.

[0156] In other words, R1max and R2max are the upper limit of the standard value of each of the resistances R1n and R2n, and R1min and R2min are the lower limit of the standard value of each of the resistances R1n and R2n.

[0157] Therefore, the thermal sensor 21 satis...

no. 3 example

[0180] Such as Figure 5 -7, the current embodiment is an example of a pair temperature sensor 1 integrally combined by connecting two temperature sensors 2 to a single connector 3 via a lead wire 22, and the two temperature sensors 2 of the pair temperature sensor 1 have At least one noticeable difference between the two.

[0181] The two temperature sensors 2 of the pair temperature sensor 1 have substantially identical electrical characteristics in the same temperature range.

[0182] Such a pair temperature sensor 1 can be obtained by the method of manufacturing a pair temperature sensor according to the first embodiment or the second embodiment.

[0183] The connector 3 has a positioning portion that allows the connector 3 to be connected in a predetermined orientation relative to the complementary connector 4 .

[0184] In the present embodiment, the positioning portion is a key groove 33 described below.

[0185] Then, at least one significant difference is set betwe...

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Abstract

A paired temperature sensor includes two temperature sensors having electrical characteristics substantially equivalent at the same temperature range, each of the temperature sensor having a thermosensitive element therein that changes its electrical characteristics according to temperature, and a pair of lead wires, and a single connector 3 to which the two temperature sensors are connected via the lead wires. The two temperature sensors have electrical characteristics substantially equivalent at the same temperature range. The connector has positioning portions for allowing the connector to be connected in a predetermined orientation relative to a counterpart connector. There is provided at least one distinguishing difference between the two temperature sensors.

Description

technical field [0001] The present invention relates to a pair temperature sensor integrally combined by connecting two temperature sensors to a single connector and a manufacturing method thereof. Background technique [0002] For example, there is a temperature sensor provided in an exhaust system of a vehicle for measuring the temperature of exhaust gas. [0003] The temperature sensor has a built-in thermal element that changes its electrical characteristics with temperature. [0004] A pair-type temperature sensor integrated by connecting two such temperature sensors to a single connector has been proposed (for example, refer to Japanese Translation No. 2010-530540 of PCT International Application). [0005] For example, a pair-type temperature sensor may be used by arranging a pair of temperature sensors upstream and downstream of a catalytic converter for exhaust gas purification, respectively. [0006] Therefore, the decay state of the catalyst in the catalytic con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/22
CPCG01K7/22G01K1/026G01K1/14Y10T29/49085
Inventor 足立智宏堀恒丹井之口和宏
Owner DENSO CORP