Fluid temperature measuring device

Abstract

The present disclosure relates to a temperature measurement device for moving a fluid, the device comprising: a base configured such that a fluid flowing in a flow direction passes through the base; and the plurality of temperature sensors are arranged on the base or arranged around the base. The plurality of temperature sensors are configured to measure a plurality of temperatures of the fluid.

Description

Technical Field

[0001] The present disclosure relates to a device for measuring the temperature of a moving fluid. Background Art

[0002] The engine uses combustion pressure generated by the combustion of fuel and oxygen in the air to move the piston in the cylinder. The combustion gas is discharged to the air via an exhaust system, which includes an exhaust valve, an exhaust manifold, a catalytic converter, an exhaust pipe, etc. The gas temperature at each location of the exhaust system can be a very important factor directly related to the performance of the machine including the engine.

[0003] For example, in a vehicle (which is a machine including an engine), when the output of the engine increases due to its performance improvement, the temperature of the exhaust system increases accordingly. Therefore, the vehicle should be designed so that the temperature of the exhaust system meets the limit temperature that can be allowed for achieving the best performance of the engine. When the limit temperature is excessively lowered unnecessarily, performance loss equivalent to the amount of temperature reduction may be caused.

[0004] However, when the temperature of the exhaust system increases, problems due to heat damage may occur. Therefore, the engine controls the temperature at all times through the protection component (COP) control so that the temperature of the exhaust gas does not exceed the limit temperature.

[0005] Therefore, it is necessary to accurately measure the temperature of the exhaust system to control the temperature. Only when the temperature of the exhaust gas is accurately acquired can the optimal catalyst and exhaust system components be designed. Since it is actually difficult to accurately measure the temperature of the exhaust gas and high development cost and production cost are required to accurately measure the temperature of the exhaust gas, COP control is performed using temperature modeling instead of using a temperature sensor.

[0006] Specifically, during the vehicle development phase, sensors are installed at each key point inside the exhaust system. The sensors measure the temperature in various driving modes of the vehicle, and each of the temperature values ​​measured by the sensors corresponds to a virtual modeling temperature.

[0007] However, in the event that there is an error in the modeled temperature, the temperature of the exhaust system may exceed a limit temperature and thus may cause problems in the vehicle.

[0008] In order to install the sensor in the exhaust system, it is necessary to remove the exhaust system components, perforate the exhaust pipe and the like at various locations, and install a thermocouple therein. These operations cause a loss of man-hours. In addition, when the route of the exhaust pipe is changed or the factors affecting the temperature are changed during the development stage, the above operations should be repeated. In addition, during the operations including perforation, it is difficult to accurately install the sensor at the center line of the exhaust pipe, and therefore errors are inevitable. In the case of a vehicle with a high exhaust volume, it may be difficult to remove the exhaust system components, so work to disassemble the engine is performed instead.

[0009] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore the above information may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the invention

[0010] The present disclosure is made in an effort to solve the above-mentioned problems associated with the prior art, and an object of the present disclosure is to provide a temperature measuring device for a fluid, which can accurately and effectively measure the temperature of an exhaust gas.

[0011] In one aspect, the present disclosure provides a temperature measurement device for a fluid, comprising: a base configured to allow a fluid flowing in a flow direction to pass through the base; and a plurality of temperature sensors disposed on or around the base and configured to measure the temperature of the fluid.

[0012] On the other hand, the present disclosure provides a temperature measurement method for moving fluid performed by a temperature measuring device, the temperature measuring device including a base, a temperature collector and multiple temperature sensors, the temperature collector being configured to collect and process the temperatures measured by the multiple temperature sensors, the temperature measurement method including: comparing a first temperature of the fluid measured at an upstream area of ​​the base with a second temperature of the fluid measured at the center of a fluid flow configured to pass through the base; comparing the second temperature with a third temperature of the fluid measured at a downstream area of ​​the base; comparing the second temperature with at least one fourth temperature of the fluid measured at multiple points in the periphery of the fluid flow configured to pass through the base; and determining whether the sizes of the first temperature, the second temperature, the third temperature and at least one fourth temperature follow a predetermined order based on the above comparisons.

[0013] Other aspects and preferred embodiments of the present disclosure are discussed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above-mentioned and other features of the present disclosure will now be described in detail with reference to some exemplary embodiments of the present disclosure shown in the accompanying drawings, which are given below by way of illustration only and therefore do not limit the present disclosure, and in which:

[0015] Figure 1 is a schematic diagram of a temperature measurement device for a fluid according to one embodiment of the present disclosure;

[0016] Figure 2 , Figure 3 , Figure 4 and Figure 5 is a perspective view of a temperature measuring device according to an embodiment of the present disclosure; and

[0017] Figure 6 Detailed description is a flowchart showing a method of measuring temperature by a temperature measuring device according to an embodiment of the present disclosure.

[0018] It should be understood that the accompanying drawings are not necessarily drawn to scale, and that they present somewhat simplified representations of various features illustrating the basic principles of the present disclosure. The specific design features of the present disclosure as disclosed herein (including, for example, specific dimensions, orientations, locations, and shapes) will be determined in part by specific intended applications and use environments.

[0019] In the drawings, reference numbers refer to the same or equivalent parts of the present disclosure throughout the several figures of the drawing. DETAILED DESCRIPTION

[0020] The specific structure or function description in the embodiments of the present disclosure set forth in the following description will be given exemplarily to describe the embodiments of the present disclosure, and the present disclosure can be presented in many alternative forms. In addition, it should be understood that the present disclosure should not be interpreted as being limited to the embodiments set forth herein, and the embodiments of the present disclosure are provided only to fully disclose the present disclosure and cover modifications, equivalents or substitutes falling within the scope and technical scope of the present disclosure.

[0021] In the following description of the embodiments, terms such as "first" and "second" are used only to describe various elements, and these elements should not be interpreted as being limited by these terms. These terms are used only to distinguish one element from other elements. For example, without departing from the scope of the present disclosure, a first element described below may be referred to as a second element, and similarly, a second element described below may be referred to as a first element.

[0022] When an element or layer is referred to as being "connected to" or "coupled to" another element or layer, it may be directly connected to or coupled to the other element or layer, or there may be intervening elements or layers. Conversely, when an element or layer is referred to as being "directly connected to" or "directly coupled to" another element or layer, there may not be intervening elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner, for example, "between" versus "directly between," "adjacent" versus "directly adjacent," etc.

[0023] Whenever possible, throughout the accompanying drawings, the same reference numerals will be used to refer to the same or similar parts. The terms used herein are used only for the purpose of describing specific embodiments and are not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular form may also be intended to include the plural form. The terms "comprise", "include", "contain" and "have" are open and therefore refer to the presence of the features, wholes, operations, elements, parts and / or combinations thereof, but do not exclude the presence or addition of one or more other features, wholes, operations, elements, parts and / or combinations thereof.

[0024] Hereinafter, reference will be made in detail to various embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings and described below.

[0025] like Figure 1 As shown, the temperature measuring device 1 for a fluid according to the present disclosure can measure the temperature of a moving fluid. For example, the temperature measuring device 1 can measure the temperature of a moving fluid passing through one or more exhaust system components 2. In one example of an implementation, the temperature measuring device 1 can be disposed on the exhaust system component 2. For example, the temperature measuring device 1 can include a gasket configured to maintain airtightness between the exhaust system components 2.

[0026] like Figure 2 and Figure 3 As shown, the temperature measurement device 1 includes a base 100 and one or more temperature sensors 200. The base 100 may be disposed on a path where a fluid or exhaust gas flows. In one example of implementation, the base 100 may be a gasket configured to maintain airtightness between exhaust system components 2.

[0027] The base 100 includes a hole 110. Fluid or exhaust gas may pass through the hole 110. Additionally, the base 100 may include two or more holes 120 coupled to the exhaust system component 2.

[0028] The temperature sensor 200 may be disposed on the base 100. The temperature sensor 200 may be disposed in or around the hole 110, and may measure the temperature of the fluid passing through the hole 110. In one example of implementation, the temperature sensor 200 is a thermocouple.

[0029] In one example of implementation, the temperature sensor 200 includes a first group of temperature sensors 210a, 210b, 210c, and 210d. The first group of temperature sensors 210a, 210b, 210c, and 210d may be disposed in the hole 110. In one example of implementation, the first group of temperature sensors 210a, 210b, 210c, and 210d may be disposed around the hole 110. For example, the first group of temperature sensors 210a, 210b, 210c, and 210d may be disposed around the hole 110 by one or more support rods 300. In one example of implementation, the temperature sensors 210a and 210c or the temperature sensors 210b and 210d may be disposed at both ends of each of the plurality of support rods 300, respectively. Each of the plurality of support rods 300 having the temperature sensors 210a and 210c or the temperature sensors 210b and 210d disposed thereon may be inserted into the hole 110 to be fixed to the hole.

[0030] The temperature sensor 200 is in contact with the base 100 and is fixed to the base by inserting the support rod 300 into the hole 110. In one example of implementation, at least one support rod 300 may be disposed in the hole 110. For example, each support rod 300 may be installed in the hole 110 while intersecting with another support rod 300 at the center of the hole 110. Although the example of the implementation shown shows two support rods 300, the number of support rods 300 may be increased or decreased. In one example of implementation, the support rod 300 may be integrally formed with the temperature sensor 200 (which is a thermocouple) and may prevent the base 100 (which is a thin pad) from being twisted.

[0031] In one example of implementation, the temperature sensor 200 includes a second group of temperature sensors 220a and 220b. The second group of temperature sensors 220a and 220b can be arranged outside the hole 110 or at a position spaced apart from the hole 110. For example, the second group of temperature sensors 220a and 220b can be arranged at a position spaced apart from the hole 110 by an extension rod 400. The extension rod 400 can extend in a direction substantially parallel to the flow direction (z-axis direction) of the fluid. The extension rod 400 can be connected to the support rod 300 and can be arranged in the hole 110. The second group of temperature sensors 220a and 220b can be arranged at both ends of the extension rod 400. In the second group of temperature sensors 220a and 220b arranged at the respective ends of the extension rod 400, one temperature sensor 220a in the second group of temperature sensors can be arranged upstream in the flow direction of the fluid, and another temperature sensor 220b in the second group of temperature sensors can be arranged downstream in the flow direction of the fluid.

[0032] In one example of implementation, the third group of temperature sensors 220c may be disposed at the center of the hole 110. For example, the third group of temperature sensors 220c may be disposed at the intersection where the support rod 300 and the extension rod 400 intersect each other. That is, the third group of temperature sensors 220c may be disposed at the center of the hole 110.

[0033] Only when the temperature measured by the first group of temperature sensors 210a, 210b, 210c and 210d is higher than the temperature measured by the third group of temperature sensors 220c, a correctly measured temperature value is obtained. Therefore, according to the present disclosure, the temperature of the fluid at several specific points of the cross section of the path where the fluid flows can be measured. Therefore, the reliability of temperature measurement can be improved.

[0034] In addition, the temperature measured by the temperature sensor 220a disposed upstream of the second group of temperature sensors 220a and 220b should be higher than the temperature measured by the third group of temperature sensors 220c. The temperature measured by the third group of temperature sensors 220c should be higher than the temperature measured by the temperature sensor 220b disposed downstream of the second group of temperature sensors 220a and 220b. According to the present disclosure, it is possible to easily determine whether the temperature measurement is correct from the temperature values ​​measured by the second group of temperature sensors 220a and 220b and the third group of temperature sensors 220c. Therefore, the reliability of temperature measurement can be improved.

[0035] In some examples of implementations, the temperature sensors 200 may be additionally installed at positions other than the above positions of the support rod 300 and the extension rod 400. In addition, additional first to third groups of temperature sensors 200 may be provided in the temperature measuring device 1, so that the respective numbers of the first to third groups of temperature sensors 200 exceed the number shown in the figure.

[0036] In one example of an implementation of the present disclosure, the temperature measuring device 1 includes one or more reinforcing members 500. The reinforcing members 500 can firmly fix the support rod 300 or the extension rod 400 disposed in the hole 110. For example, as in the illustrated example, a pair of reinforcing members 500 can connect each of the plurality of support rods 300 to the base 100.

[0037] refer to Figure 4 In some examples of the implementation of the present disclosure, the extension rod 400 may be formed of a soft material. For example, when the path of the exhaust system component 2 where the fluid flows is bent at a portion of the exhaust system component 2 connected to the base 100, the extension rod 400 may also bend to be parallel to the bent path.

[0038] like Figure 5 As shown, the temperature measuring device 1 according to the present disclosure includes a temperature collector 600. For example, the temperature collector 600 may include a processor and a memory, and may process and store the temperature information measured by the temperature sensor 200.

[0039] The temperature collector 600 can communicate with the temperature sensor 200. For example, the temperature collector 600 can communicate with the temperature sensor 200 by wire or wirelessly. In one example of the implementation, the temperature collector 600 can be connected to the temperature sensor 200 by a wire 610. In one example of the implementation, the wire 610 can be connected to the temperature sensor 200 via the base 100 and additionally via the support rod 300 or the extension rod 400. The wire 610 can be connected to the temperature sensor 200 by passing through the base 100, so that a stable structure can be ensured. In one example of the implementation, the temperature collector 600 may include an interface. The temperature collector 600 can output the measured temperature value, error count and warning message, etc., which will be described below, to the user through the interface.

[0040] The temperature collector 600 can monitor the temperature of the fluid based on the measured temperature. For example, the temperature collector 600 can perform monitoring operations such as Figure 6 That is, the temperature collector 600 can easily determine whether the temperature measurement is properly performed by comparing the temperature values ​​measured by the respective temperature sensors 200, which improves the reliability of the temperature measurement.

[0041] At operation S600 , the temperature sensor 200 starts measuring the temperature of the fluid or exhaust gas in the exhaust system. The temperature collector 600 receives temperature information from each temperature sensor 200 .

[0042] At operation S610, the temperature collector 600 compares the first temperature T1 measured by the temperature sensor 220a disposed upstream in the flow direction of the fluid among the second group of temperature sensors 220a and 220b with the second temperature T2 measured by the third group of temperature sensors 220c disposed at the center of the temperature measuring device 1. Specifically, the temperature collector 600 determines whether the first temperature T1 exceeds the second temperature T2. When it is determined that the first temperature T1 exceeds the second temperature T2, operation S620 is performed. When it is determined that the first temperature T1 is equal to or lower than the second temperature T2, at operation S660, the temperature collector 600 determines this situation as an error, sets the error count to +1, and then stores the set error count.

[0043] At operation S620, the temperature collector 600 compares the second temperature T1 with the third temperature T3 measured by the temperature sensor 220b disposed downstream in the flow direction of the fluid in the second group of temperature sensors 220a, 220b. Specifically, the temperature collector 600 determines whether the second temperature T2 exceeds the third temperature T3. When it is determined that the second temperature T2 exceeds the third temperature T3, operation S630 is performed. When it is determined that the second temperature T2 is equal to or lower than the third temperature T3, the temperature collector 600 determines this situation as an error and counts the error by +1.

[0044] At operation S630, the temperature collector 600 determines whether the corresponding temperatures T4, T5, T6, and T7 measured by the first group of temperature sensors 210a, 210b, 210c, and 210d are similar to each other or within a predetermined range. The temperature collector 600 performs operation S640 when it is determined that the temperatures T4, T5, T6, and T7 are similar to each other, and counts the error by +1 at operation S660 when it is determined that the temperatures T4, T5, T6, and T7 are not similar.

[0045] At operation S640, the temperature collector 600 determines whether any one of the temperatures T4, T5, T6, and T7 measured by the first group of temperature sensors 210a, 210b, 210c, and 210d (e.g., temperature T4) exceeds the second temperature T2. When it is determined that the temperature T4 exceeds the second temperature T2, at operation S650, the temperature collector 600 initializes an error count, and at operation S690, terminates the temperature measurement.

[0046] At operation S670, whenever the error count is calculated, the temperature collector 600 determines whether the error count is greater than a predetermined number q. When it is determined that the error count is equal to or less than the predetermined number q, the temperature measurement process returns to operation S600 to remeasure the temperature. On the contrary, when the temperature collector 600 determines that the error count is greater than the predetermined number q, that is, when a value different from the expected value is repeatedly measured, the temperature collector determines that there is an error in the temperature sensor 200. In one example of an implementation, the temperature collector 600 may output a warning message. In this case, for example, the temperature collector 600 may output a message indicating an erroneous temperature measurement. After outputting the message, the temperature measurement is terminated at operation S690.

[0047] According to the present disclosure, man-hours required to additionally install a sensor configured to measure the temperature of an exhaust system can be reduced, and efficiency can be improved.

[0048] According to the present disclosure, deformation and damage of exhaust system components due to perforation and welding can be prevented, and reliability can be improved.

[0049] According to the present disclosure, it is possible to ensure reliability of the accuracy of the temperature of the exhaust system measured based on the fluid temperature measured at a plurality of points.

[0050] As is apparent from the above description, the present disclosure provides a temperature measuring device for a fluid, which can accurately and effectively measure the temperature of an exhaust gas.

[0051] The present disclosure has been described in detail with reference to the preferred embodiments of the present disclosure. However, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A temperature measuring device for a fluid, comprising: a base through which a fluid flowing in a flow direction passes; and A plurality of temperature sensors are disposed on or around the base, and the plurality of temperature sensors are configured to measure a plurality of temperatures of the fluid. 2 . The temperature measuring device according to claim 1 , further comprising a temperature collector configured to collect and process a plurality of temperatures of the fluid measured by a plurality of the temperature sensors. 3 . The temperature measurement device according to claim 2 , further comprising a wire configured to connect the plurality of temperature sensors to the temperature collector.

4. The temperature measuring device according to claim 1, wherein: The base is a gasket disposed between parts connected to each other, wherein the fluid flows through the parts.

5. The temperature measuring device according to claim 4, wherein: The fluid is exhaust gas flowing along exhaust system components of a vehicle, and wherein the base is a gasket configured to air-tightly connect the exhaust system components to each other.

6. The temperature measuring device according to claim 1, further comprising a support rod fixed in the base, and wherein, A plurality of the temperature sensors are mounted to the support rod. 7 . The temperature measurement device of claim 6 , further comprising one or more reinforcement members configured to reinforce the fixation of the support rod to the base.

8. The temperature measurement device according to claim 1, further comprising an extension rod connected to the base and configured to extend parallel to the flow direction, in, A plurality of the temperature sensors are mounted on the extension rod.

9. The temperature measuring device according to claim 8, wherein: The extension rod is made of soft material.

10. The temperature measurement device according to claim 1, further comprising a support rod fixed in the base and configured to extend through the center of the base, in, At least one temperature sensor among the plurality of temperature sensors is mounted on the support rod.

11. The temperature measurement device of claim 1 , further comprising a hole formed through the base and configured to allow the fluid to pass through the hole, in, The plurality of temperature sensors includes a group of temperature sensors disposed around the hole.

12. The temperature measurement device of claim 1, further comprising a hole formed through the base and configured to allow the fluid to pass through the hole, in, The plurality of temperature sensors include a group of temperature sensors connected to the base and disposed to be spaced apart from the base.

13. The temperature measurement device of claim 1, further comprising a hole formed through the base and configured to allow the fluid to pass through the hole, in, The plurality of temperature sensors include a group of temperature sensors connected to the base and disposed in the center of the hole.

14. A temperature measurement method for a moving fluid performed by a temperature measurement device, the temperature measurement device comprising a base, a temperature collector and a plurality of temperature sensors, the temperature collector being configured to collect and process a plurality of temperatures measured by the plurality of temperature sensors, the temperature measurement method comprising: comparing a first temperature of the fluid measured upstream of the susceptor to a second temperature of the fluid measured at a center of a fluid flow configured to pass through the susceptor; comparing the second temperature to a third temperature of the fluid measured downstream of the base; comparing the second temperature to one or more fourth temperatures of the fluid measured at a plurality of points in a perimeter of a flow of the fluid configured to pass through the susceptor; as well as Based on these comparisons it is determined whether the values ​​of the first temperature, the second temperature, the third temperature and the one or more fourth temperatures follow a predetermined order.

15. The temperature measurement method according to claim 14, further comprising: determining whether the one or more fourth temperatures measured at the plurality of points are within a specified error range relative to each other; as well as When it is determined that the one or more fourth temperatures are within the specified error range, the second temperature is compared with the one or more fourth temperatures.

16. The temperature measurement method according to claim 14, further comprising: When the first temperature is equal to or lower than the second temperature, it is determined that a first error occurs.

17. The temperature measurement method according to claim 16, further comprising: When the second temperature is equal to or lower than the third temperature, it is determined that a second error occurs.

18. The temperature measurement method according to claim 17, further comprising: When the one or more fourth temperatures are equal to or lower than the second temperature, it is determined that a third error occurs.

19. The temperature measurement method according to claim 18, further comprising: When the sum of the number of occurrences of the first error, the second error, and the third error exceeds a specified number of times, a message indicating a measurement error is output.

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