Temperature sensor correction device for use with a thermostat bath

Abstract

The present invention relates to a temperature sensor correction device using a thermostat tank, in detail, the present invention is as follows: the device with thermostat tank function can be used to accurately match the temperature between the measurement sensors to accurately measure the temperature, thereby improving the measurement accuracy of the sensor.

Description

TECHNICAL FIELD

[0001] The present invention relates to a temperature sensor correction device using a thermostat, and more particularly, to an invention capable of using a device having a thermostat function to accurately match temperatures between measurement sensors to precisely measure temperature, thereby improving the measurement accuracy of a temperature sensor. BACKGROUND

[0002] A thermostat refers to a device in which a container is used to maintain a constant temperature for a long time.

[0003] The principle is to maintain a constant temperature by using the physical properties of a heavy soup material, i.e., melting point, boiling point, freezing point, and transition temperature, using a regulator.

[0004] The structure is composed of a container wrapped with an insulating material on the outside, and subsidiary devices such as a temperature regulator, a heat source, a stirrer, a thermometer, etc. are placed therein.

[0005] Electricity or gas can be used as a heat source, and water, alcohol, air, and oil can be used as a heavy soup.

[0006] If saturated calcium chloride, glycerin, paraffin, etc. are used as a heavy soup, the temperature can be adjusted to 100°C to 200°C.

[0007] When a sensor for precise measurement is inserted into a thermostat and used, even a slight temperature difference occurs, which exceeds the tolerance, so that precise measurement cannot be performed.

[0008] In a sensor for precise measurement, the temperature between sensors must be exactly the same, and for this purpose, a thermostat system that maintains a constant temperature can be used.

[0009] However, in order to obtain a certain degree of constant temperature environment, precise temperature control that repeatedly cools and heats is required, and thus there is a problem in that it is difficult to precisely control the temperature.

[0010] Recently, a technology that precisely controls the constant temperature by adjusting the power supply using a thermoelectric element has been developed.

[0011] Such a thermoelectric element is configured in the form of a module in which n-type and p-type thermocouples are connected in electrical series and in thermal parallel. When a direct current flows, a temperature difference occurs on both sides of the module due to the thermoelectric effect.

[0012] This generally refers to a solid-state heat pump using a cooling effect due to the Peltier phenomenon.

[0013] In the case of the thermoelectric element, if one side is heated (cooled), the other side is cooled (heated), and thus a proper heat sink is installed to control the temperature.

[0014] However, since the existing constant temperature bath system cannot perform sufficient heat exchange, it cannot promote heat circulation in the constant temperature bath, and thus has a problem in that it is difficult to control the overall temperature.

[0015] In addition, for a thermometer having a relative accuracy of ±0.01°C or more, only when a sensor is accurately calibrated, a desired ultra-accurate thermometer can be developed.

[0016] In addition, the existing commercially available sensor or newly developed sensor has a disadvantage in that it is difficult to arbitrarily obtain mutual accuracy of ±0.01°C or more.

[0017] Therefore, there is a need for a temperature sensor correction device using a constant temperature bath that effectively controls heat exchange and thereby improves the function of the constant temperature bath.

[0018] Patent Document 1 Patent No. 2005-0023879 SUMMARY

[0019] Technical Problem to be Solved

[0020] The present invention is an invention that can improve the accuracy of a sensor by maintaining the temperature of the sensor within a certain range using a constant temperature bath that can stably maintain the temperature, and the purpose thereof is to minimize the problem of measurement error due to a temperature difference between existing measurement sensors, and to set an accurate measurement value and a temperature value at which the sensor exhibits the best performance, thereby being able to obtain an accurate measurement value.

[0021] Means for Solving the Problem

[0022] To solve the above problem, the temperature sensor correction device using a constant temperature bath according to the present invention can include a housing portion in which a hollow portion filled with constant temperature bath oil is formed, a cover portion that seals the housing portion, a block portion formed in the inside of the housing portion and formed to penetrate the cover portion at a predetermined portion, a reference sensor and an experimental sensor inserted into the block portion, a control portion that controls the circulation of the constant temperature bath oil so that the temperature of the block portion is maintained within a predetermined range, and a correction circuit portion for correcting the experimental sensor.

[0023] In addition, a rotating device is further included, which is disposed in the hollow portion of the housing portion and performs a rotating motion at the lower side of the hollow portion, and the rotating device can perform forced convection of the constant temperature bath oil.

[0024] In addition, the housing portion and the cover portion can be vacuum heat treated.

[0025] In addition, a reference sensor and an experimental sensor are inserted into the block part, and a temperature value of the experimental sensor can be corrected in a manner corresponding to a preset value of the reference sensor.

[0026] In addition, a circulation part for circulating the constant-temperature tank oil is included, and the circulation part can include an oil pipe combined with the housing part through which the constant-temperature tank oil flows, a refrigerator for cooling the constant-temperature tank oil, a heat exchanger for exchanging heat of the constant-temperature tank oil flowing into the refrigerator, and a pump for generating a driving force for circulating the constant-temperature tank oil filled into the hollow part of the housing part.

[0027] In addition, the correction circuit part includes a Wheatstone bridge circuit, the experimental sensor includes an RTD sensor whose resistance varies according to temperature, and the RTD sensor can form a bridge structure of the Wheatstone bridge circuit of the correction circuit part.

[0028] In addition, the Wheatstone bridge circuit includes a variable resistor connected in parallel to one of a plurality of resistors forming a bridge structure in the Wheatstone bridge circuit and capable of fine adjustment of the one resistor.

[0029] To solve the above problems, a temperature sensor correction device using a constant-temperature tank according to the present application includes a housing part in which a hollow part filled with constant-temperature tank oil is formed, a cover part for sealing the housing part, a block part formed in the inside of the housing part and penetrating the cover part at a predetermined portion, a reference sensor and an experimental sensor inserted into the block part, a control part for controlling circulation of the constant-temperature tank oil so that the temperature of the block part is maintained within a predetermined range, and a correction circuit part for correcting the experimental sensor. The block part includes a first block part in a cylindrical shape and having a diameter smaller than that of the housing part, a second block part formed in contact with and extending from the upper surface of the first block part and having a diameter smaller than that of the first block part, a third block part formed in contact with and extending from the upper surface of the second block part and having a diameter smaller than that of the second block part and penetrating from the inside to the outside of the cover part, a fourth block part formed at the upper side of the third block part and threadedly combined with the third block part, a fifth block part formed at the upper side of the fourth block part and having the same diameter as that of the third block part, and a penetration groove penetrating the center of the first to fifth block parts. The upper side of the third block part and the fourth block part are formed to protrude outward of the upper side of the cover part, a thread is formed on the outer circumferential surface of the upper side of the third block part, a thread groove is formed on the inner circumferential surface of the fourth block part, and the thread is combined with the thread groove so that the block part and the cover part are fixed to each other.

[0030] To solve the above problems, the temperature sensor correction device using a thermostat bath according to the present application includes a housing part in which a hollow part filled with a thermostat bath oil is formed, a cover part sealing the housing part, a block part formed in the inside of the housing part and penetrating the cover part at a predetermined portion, a reference sensor and an experimental sensor inserted into the block part, a control part controlling circulation of the thermostat bath oil so that the temperature of the block part is maintained within a prescribed range, and a correction circuit part for correcting the experimental sensor; the block part includes a first block part in a cylindrical shape and having a diameter smaller than that of the housing part, the entire area of the first block part being immersed in the thermostat bath oil, a second block part formed so as to be in contact with the upper surface of the first block part and extend, the second block part having a diameter smaller than that of the first block part, a third block part formed so as to be in contact with the upper surface of the second block part and extend, the third block part having a diameter smaller than that of the second block part and penetrating from the inside to the outside of the cover part, a fourth block part formed on the upper side of the third block part and threadedly coupled to the third block part, a fifth block part formed on the upper side of the fourth block part and having the same diameter as that of the third block part, and a penetration groove penetrating the center of the first block part to the fifth block part; the upper side of the third block part and the fourth block part are formed so as to protrude to the outside of the upper side of the cover part, a thread is formed on the outer circumferential surface of the upper side of the third block part, a thread groove is formed on the inner circumferential surface of the fourth block part, the thread is coupled to the thread groove, thereby fixing the block part and the cover part to each other, the correction circuit part includes a Wheatstone bridge circuit, the experimental sensor includes an RTD sensor whose resistance varies according to temperature, the RTD sensor forms a bridge structure of the Wheatstone bridge circuit of the correction circuit part, the Wheatstone bridge circuit includes a variable resistor connected in parallel to one of a plurality of resistors forming a bridge structure in the Wheatstone bridge circuit, and the one resistor is finely adjusted.

[0031] Effects of the Invention

[0032] The present application has an effect that a more accurate sensor can be manufactured, by inserting the reference sensor and the experimental sensor into the thermostat bath and correcting the experimental sensor under the same conditions as the reference sensor.

[0033] In addition, the present application has an effect that a temperature sensor correction device capable of equally correcting a reference sensor and an experimental sensor can be provided, by providing a thermostat having an organic combination of a heating part and a thermostat bath treated by oil circulation and vacuum heat insulation, thereby finely adjusting the temperature.

[0034] In addition, the present application provides a coating capable of preventing corrosion because copper or aluminum having a high thermal conductivity and various materials are used for the block portion and the heating portion in the constant-temperature tank which maintains a constant temperature for a long time, and thus corrosion can occur. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a perspective view of a housing portion and a cover portion of the present application.

[0036] Figure 2 shows a sectional view and a circulation portion of the present application.

[0037] Figure 3 is a vacuum insulation for explaining the housing portion and the cover portion of the present application.

[0038] Figure 4 is an internal heating portion for explaining the housing portion of the present application.

[0039] Figure 5 is a perspective view of a block portion of the present application.

[0040] Figure 6 is a convection of constant-temperature tank oil according to a rotating device for explaining the present application.

[0041] Figure 7 is a sensor located inside the block portion for explaining the present application.

[0042] Figure 8 is a circulation process of constant-temperature tank oil for explaining the present application.

[0043] Figure 9 shows a correction circuit portion of the present application.

[0044] Figure 10 is a graph showing the last two clusters of the present application.

[0045] REFERENCE NUMERALS

[0046] 100: housing portion,

[0047] 110: heating portion,

[0048] 120: first hole,

[0049] 130: second hole,

[0050] 200: cover portion,

[0051] 300: block portion,

[0052] 310: first block portion,

[0053] 320: second block portion,

[0054] 330: third block portion,

[0055] 340: fourth block portion,

[0056] 350: fifth block portion,

[0057] 400: rotating device,

[0058] 500: motor,

[0059] 600: circulating portion,

[0060] 610: oil pipe,

[0061] 620: pump,

[0062] 630: refrigerator,

[0063] 640: heat exchanger,

[0064] 700: support portion,

[0065] 800: control portion,

[0066] S: sensor,

[0067] HO: constant temperature tank oil,

[0068] H: hollow portion. DETAILED DESCRIPTION

[0069] Hereinafter, embodiments of the present application will be described in detail so that those skilled in the art to which the present application pertains can easily practice the present application. However, the present application can be implemented in various different forms and is not limited to the embodiments described below.

[0070] Hereinafter, definitions of terms used below are as follows. "Length direction" means "X axis direction" based on Figure 2 "width direction" means "Y axis direction" based on Figure 2 "vertical direction" means "Z axis direction" based on Figure 2

[0071] In addition, constant temperature means maintaining a constant temperature, and a process of cooling or heating for a constant temperature (target temperature) can also be referred to as constant temperature.

[0072] In addition, adiabatic used in the present application can be explained as preventing movement of heat, and means that a constant temperature can be maintained by preventing movement of heat.

[0073] The temperature sensor correction device using a constant temperature tank according to the present application is an invention which can optimally derive performance of a sensor by maintaining a certain temperature range through temperature maintenance, adiabatic, and temperature adjustment functions of the constant temperature tank, and can significantly reduce a temperature difference between sensors through temperature correction.

[0074] ​To this end, the temperature sensor correction device using a thermostat bath according to the present application includes a housing part 100, a cover part 200, a block part 300, a rotating device 400, a motor 500, a circulating part 600, a support part 700, a control part 800, and a correction circuit part 900.

[0075] First, referring to Figure 1 , the housing part 100 serves as an overall frame in which constituent elements of the present application are disposed or connected, has a cylindrical shape, and is in an open shape at an upper surface, and a portion of a lower part is formed in a shape that narrows toward a lower side.

[0076] Although the housing part 100 is shown in a cylindrical shape in the present application, it can have various outer shapes such as a quadrangular shape, a trapezoidal shape, etc., and is not limited thereto.

[0077] Referring to Figure 2 , the housing part 100 is formed with a hollow part H inside, and the block part 300 and the rotating device 400, which will be described later, can be built in the hollow part H.

[0078] Further, the hollow part H of the housing part 100 can be filled with a thermostat bath oil HO to have a thermostat effect. The thermostat bath oil HO is filled inside the housing part 100 to maintain a thermostat of the block part 300, which will be described later, and a description about the thermostat effect of the block part 300 by the thermostat bath oil HO will be made later.

[0079] In addition, in the present application, the thermostat bath oil HO refers to a fluid for maintaining a constant temperature, and various materials such as water, alcohol, saturated calcium chloride, glycerin, paraffin, etc. can be used instead of oil.

[0080] The present application does not limit the kind of the fluid having a thermostat function described above, and as an example of the present application, silicon oil can be used.

[0081] Since the silicon oil does not freeze at a temperature below zero and does not evaporate at a temperature above 100℃, it has an advantage that temperature correction can be performed in a wide range.

[0082] In addition, since temperature correction can be performed from -40℃ below zero to 300℃ above zero, it has an advantage that appropriate temperature correction can be performed under the climate conditions of Korea.

[0083] Thus, in response to the feature of the present application to correct a temperature in decimal point units, the housing part 100 includes a first hole 120 and a second hole 130 for connection to the circulating part 600, which will be described later, the first hole 120 and the second hole 130 are formed to penetrate the outside and the inside of the housing part 100 at the upper side and the lower side of the housing part 100, respectively, and to communicate with the hollow part H.

[0084] Referring to Figure 4A heating portion 110, which can be heated to increase the temperature of the constant-temperature tank oil HO, is formed inside the housing portion 100.

[0085] Preferably, a plurality of heating portions 110 are formed along the inner circumferential surface of the housing portion 100, and each heating portion 110 is formed at a certain interval from each other in the vertical direction in a circular band shape along the inner circumferential surface of the housing portion 100.

[0086] The heating portion 110 has a feature that the temperature of the constant-temperature tank oil HO can be increased in the circulation process of the constant-temperature tank oil HO according to the circulation portion 600 of the control portion 800 described later, and in this regard, it is described while the circulation portion 600 is described later.

[0087] Referring to Figure 1 , a cover portion 200 covering the upper side of the housing portion 100 is shown.

[0088] The cover portion 200 has a feature of sealing the upper surface of the housing portion 100, thereby having an effect of increasing the heat insulation function of the housing portion 100.

[0089] In detail, the cover portion 200 preferably has the same outer diameter as the upper surface of the housing portion 100, and the inner diameter can be equal to or less than the inner diameter of the housing portion 100.

[0090] Although not shown, the center of the cover portion 200 can be formed with a groove so that a part of the block portion 300 described later can be penetrated and protrude. At this time, the groove is preferably formed in a shape penetrating the outer side and the inner side of the cover portion.

[0091] The cover portion 200 has an effect of preventing foreign matter and moisture from flowing into the constant-temperature tank oil HO filled in the hollow portion H of the housing portion 100 by sealing the housing portion 100.

[0092] In addition, since the cover portion 200 is also subjected to the same vacuum heat insulation treatment as the housing portion 100, it has an effect of increasing the heat insulation effect.

[0093] Referring to Figure 3 , the vacuum heat insulation of the housing portion 100 and the cover portion 200 is described.

[0094] Figure 3 The P1 portion of Figure 2 is shown in an enlarged manner.

[0095] In this regard, in the housing portion 100 of the present application, a vacuum space V is formed between the inner wall and the outer wall.

[0096] In detail, preferably, the inner wall and the outer wall are spaced apart at a certain interval, and an empty space is formed between the outer wall and the inner wall, and the empty space is subjected to vacuum treatment.

[0097] The vacuum adiabaticity of the case part 100 described above is preferably identically applied to the cover part 200, having a feature of minimizing the influence of external temperature changes through vacuum adiabatic treatment of the case part 100 and the cover part 200.

[0098] Accordingly, the case part 100 and the cover part 200 exhibit high adiabatic performance by blocking radiation and heat conduction through convection.

[0099] This has the effect of minimizing heat supply or heat loss from the outside and enabling the stable constant-temperature effect of the constant-temperature bath oil HO of the present application to be continuously maintained.

[0100] Figure 3 The arrows merely indicate blocking of radiation, convection, and heat conduction, and do not refer to external force or additional members.

[0101] Second, referring to Figure 2 and Figure 5 , the block part 300 will be described.

[0102] First, referring to Figure 2 , the block part 300 is inserted into the internal hollow part H of the case part 100, and a portion of the upper part penetrates the cover part 200 and protrudes to the outside.

[0103] The material of the block part 300 can use various materials such as iron, nickel, alloy, gold, silver, platinum, etc., and in the present application, a copper material is used, and since copper has the characteristics of large heat capacity and fast thermal conductivity, a stable state temperature can be obtained. However, the above-described material can be modified by the designer or the user, and is not limited thereto.

[0104] Referring to Figure 5 , the block part 300 includes a first block part 310, a second block part 320, a third block part 330, a fourth block part 340, and a fifth block part 350.

[0105] The first block part 310 is cylindrical, and its diameter is preferably smaller than the diameter of the case part 100, and the vertical length is also preferably smaller than the vertical length of the case part 100. This is because the first block part 310 has an effective constant-temperature effect by being immersed in the constant-temperature bath oil HO through the entire area.

[0106] The second block part 320 is formed to be in contact with and extend from the upper surface of the first block part 310, is preferably cylindrical, and is preferably smaller than the diameter of the first block part 310.

[0107] The third block part 330 is formed to be in contact with and extend from the upper surface of the second block part 320, and is preferably smaller than the diameter of the second block part 320.

[0108] The third block 330 is formed to penetrate the cover 200, and the reason that the third block 330 is formed to have a smaller diameter than the second block 320 is that the third block 330 directly penetrates the cover 200, and the diameter of a groove of the cover 200, which is not shown, is minimized in order to maximize the constant temperature effect of the present application.

[0109] The upper outer surface of the third block 330 is formed with a screw thread 331.

[0110] The fourth block 340, which is threadedly combined with the third block 330, is formed on the upper side of the third block 330.

[0111] The inner circumferential surface of the fourth block 340 is preferably formed with a screw groove 341 so as to be threadedly combined with the third block 330, and preferably, the third block 330 and the fourth block 340 are thereby threadedly combined with each other.

[0112] The fourth block 340 is formed to have a larger diameter than the third block 330, in order to be combined with the third block 330, which penetrates the cover 200, and to tightly fix the cover 200, the third block 330, and the fourth block 340.

[0113] In other words, a portion of the upper side of the third block 330 penetrates the cover 200 from the inside to the outside of the cover 200, and the third block 300 is thereby fixed to the cover 200 by the thread 331 of the third block 300 being combined with the screw groove 341 of the fourth block 340.

[0114] The fifth block 350 is formed on the upper side of the fourth block 340, and the fifth block 350 preferably has the same diameter as the third block 330.

[0115] The fifth block 350 is preferably formed with a groove penetrating the center, and preferably, a penetration groove 360, which penetrates the fourth block 340, the third block 330, the second block 320, and the first block 310, is formed with the groove of the fifth block 350 as a reference.

[0116] Referring to Figure 2 , the first block 310 to the fifth block 350 are preferably communicated by the penetration groove 360, and the sensor S, which will be described later, is inserted into the fifth block 350, and referring to Figure 7 , the sensor S, which will be described later, is preferably located inside the block 300 by the penetration groove 360.

[0117] That is, the sensor S, which will be described later, is preferably introduced into the block 300 by the penetration groove 360, which penetrates the center.

[0118] In addition, the penetration groove 360 penetrates only a portion of the vertical direction of the first block 310, not the entire block 300, and is not communicated with the hollow portion H of the housing 100 by penetrating the entire body.

[0119] Referring to Figure 6 , a rotating device 400 for forcibly convection of the constant temperature tank oil HO is shown inside the housing part 100 of the present application.

[0120] The rotating device 400 is formed at the lower side inside the housing part 100, and is combined with the motor 500 located outside the housing part 100 to receive a driving force.

[0121] By receiving the driving force of the motor 500, the rotating device 400 can rotate in the form of a propeller, and by the rotation, the constant temperature tank oil HO filled in the hollow part H of the housing part 100 can be forcibly convection.

[0122] The forcibly convection is one of convection, and refers to a convection phenomenon that occurs due to an external force that moves fluid.

[0123] The constant temperature tank oil HO is mixed by the forcibly convection of the constant temperature tank oil HO by the rotating device 400, which has an effect of suppressing a thermal convection phenomenon, and the temperature of the entire constant temperature tank oil HO is uniform.

[0124] In addition, referring to Figure 2 , the constant temperature tank oil HO having a uniform temperature by the rotating device 400 rotates along the outer peripheral surface of the block part 300, thereby having an effect of making the entire temperature of the block part 300 uniform.

[0125] Next, the circulation part 600 for adjusting the temperature of the constant temperature tank oil HO to maintain an optimal temperature range will be described.

[0126] Referring to Figure 8 , in Figure 8 , in order to explain the circulation process of the constant temperature tank oil HO by the circulation part 600, a part of the structure located inside the housing part 100 is omitted.

[0127] Therefore, the circulation part 600 includes an oil pipe 610, a refrigerant 630, a heat exchanger 640, and a pump 620.

[0128] The oil pipe 610 is combined with the housing part 100 so that the constant temperature tank oil HO flows.

[0129] In detail, the oil pipe 610 can be a pipe or a hose through which the constant temperature tank oil HO flows, and is combined with the first hole 120 and the second hole 130 of the housing part 100, respectively, so that the constant temperature tank oil HO inside the housing part 100 can be circulated.

[0130] The refrigerant 630 is a device that utilizes the phenomenon of making a refrigerant that is easy to gasify into a liquid and absorbing gasification heat from the surroundings when the refrigerant is gaseous, and is used to lower the temperature of the thermostatic tank oil HO flowing into the refrigerant 630 through the oil pipe 610 when it is necessary to lower the temperature of the block 300.

[0131] The heat exchanger 640 is a device capable of exchanging heat of a fluid, can prevent excessive cooling of the thermostatic tank oil HO passing through the refrigerant 630, and has the effect of preventing the temperature of the thermostatic tank oil HO from sharply changing according to the temperature of the oil pipe 610.

[0132] Second, the pump 620 is a device that generates a driving force to circulate the thermostatic tank oil HO, and the thermostatic tank oil HO can be circulated in the hollow portion H of the housing portion 100 due to the driving force of the pump 620, passing through the oil pipe 610, the refrigerant 630, the heat exchanger 640, and again through the oil pipe 610.

[0133] Next, the circulation process and the temperature adjustment method of the circulation portion 600 in which the temperature of the thermostatic tank oil HO is adjusted according to the present application will be described.

[0134] [When lowering the temperature]

[0135] When it is sensed through the control portion 800 that the block 300 and the thermostatic tank oil HO are overheated, the thermostatic tank oil HO filled in the inside of the housing portion 100 is flowed into the refrigerant 630 through the oil pipe 610 by the pump 620.

[0136] Therefore, the temperature of the thermostatic tank oil HO is lowered by the refrigerant 630. At this time, the cooling temperature is set to be lower than the target temperature (optimum temperature) by, for example, 1 to 2°C. Since the cold and heat control of the refrigerant 630 is difficult to perform precise temperature control, the thermostatic tank oil HO cooled by 1 to 2°C can be adjusted to maintain a constant temperature by the heating portion 110 located on the inner peripheral surface of the housing portion 100.

[0137] [When raising the temperature]

[0138] When it is recognized through the control portion 800 that the temperature of the block 300 and the thermostatic tank oil HO is lowered, the thermostatic tank oil HO is heated to the target temperature and maintained at a constant temperature by the heating portion 110 located on the inner peripheral surface of the housing portion 100.

[0139] Further, referring to Figure 1 , a pair of support portions 700 for restricting the movement of the housing portion 100 are formed on the outer surface of the housing portion 100 of the present application.

[0140] The pair of support portions 700 prevent the flow of the thermostatic tank oil HO filled in the inside by fixing the housing portion 100, thereby maximizing the constant temperature maintaining effect.

[0141] In addition, the support part 700 prevents a fatigue failure phenomenon from occurring due to fatigue accumulated in the case part 100 by heat or vibration generated from the ground by spacing the case part 100 apart from the ground by a certain interval.

[0142] Accordingly, the support part 700 absorbs an impact that can be applied to the case part 100 and closely supports the case part 100, so that a constant temperature effect of the present application can be maximized.

[0143] In addition, the control part 800 of the present application can be directly implemented by hardware, or implemented by a software module executed by hardware, or can be implemented by a combination of both. The software module can reside in a random access memory (RAM), a read only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a flash memory, a hard disk, a removable magnetic disk, a CD-ROM, or any type of computer readable recording medium well known in the art to which the present application pertains.

[0144] In addition, in order to maintain a constant temperature of the block part 300 of the present application, preferably, the control part 800 can perform data values, sensing, and overall control of constituent elements of the present application.

[0145] The constituent elements of the present application can be executed in combination with a computer as hardware, and for this, can be implemented as a program (or an application) and stored in a medium. The constituent elements of the present application can be implemented as a software program or a software component, and similarly, the embodiments can include various algorithms implemented as a combination of data structures, processes, routines, or other programming constructs, and can be implemented by programming or a scripting language such as C, C++, Java, assembler, etc. A functional aspect can be implemented by an algorithm running on one or more processors.

[0146] Referring to Figure 2 and Figure 7 A sensor S inserted into the through groove 360 of the block part 300 will be described.

[0147] The sensor S includes a reference sensor S1 and an experimental sensor S2, and the sensor S is preferably connected to each other with the above-described control part 800.

[0148] The reference sensor S1 and the experimental sensor S2 are preferably inserted into the through groove 360 and located inside the block part 300, and are preferably located adjacent to each other.

[0149] In addition, a predetermined temperature value, i.e., a temperature range for the sensor to exhibit optimal performance, is preferably preset for the reference sensor S1.

[0150] After the reference sensor S1 and the experimental sensor S2 are brought close to each other inside the block 300 and the reference sensor S1 to obtain specific data of resistance and electromotive force, the accurate temperature value indicated by the reference sensor S1 is corrected to the temperature value of the experimental sensor.

[0151] For example, it is assumed that the temperature at which the experimental sensor S2 exhibits optimal performance is 10°C, and the temperature value of 10°C is preset for the reference sensor.

[0152] If it is assumed that the temperature of the block 300 and the thermostat oil HO is 11°C, the experimental sensor cannot exhibit optimal performance.

[0153] Therefore, the reference sensor S1 transmits data on the measured temperature value to the control portion 800 to exhibit optimal performance of the experimental sensor S2.

[0154] That is, when the reference sensor S1 exceeds the preset temperature range, data on the current temperature value is transmitted to the control portion 800.

[0155] In order to maintain the temperature of the block 300 at 10°C, the control portion 800 drives the circulation portion 600 according to the temperature value sensed by the reference sensor S1 so that the thermostat oil HO is maintained at 10°C by circulation of the thermostat oil HO.

[0156] The block is maintained at 10°C due to the change in the temperature of the thermostat oil HO, so that the experimental sensor S2 can exhibit optimal performance.

[0157] The reference sensor S1 senses the temperature of the block 300 at a certain period, and when the temperature of the block 300 exceeds the optimal range, the sensed value can be transmitted to the control portion 800 to maintain the optimal temperature range.

[0158] Referring to Figure 2 and Figure 9 The experimental sensor S2 and the correction circuit portion 900 according to the present application will be described.

[0159] The experimental sensor S2 according to the present application can include a resistance temperature detector (RTD) sensor represented by PT100. That is, the experimental sensor S2 is a sensor in which resistance varies according to temperature, and temperature can be measured by measuring the varied resistance. A Wheatstone bridge circuit can be used to measure the varied resistance.

[0160] According to Figure 2The correction circuit portion 900 is connected to the experimental sensor S2, and can be included inside the control portion 800. The correction circuit portion 900 can adjust the included variable resistance by a control command of the control portion 800.

[0161] According to Figure 9 , the correction circuit portion 900 can include a Wheatstone bridge circuit. The variable resistance can be connected in parallel to one of the multiple resistances constituting the Wheatstone bridge structure. The equivalent resistance of one of the multiple resistances constituting the Wheatstone bridge structure can be fine-tuned by adjusting the variable resistance connected in parallel.

[0162] According to Figure 9 , the RTD sensor among the experimental sensors can be one of the multiple resistances constituting the Wheatstone bridge structure.

[0163] The resistance value of the RTD sensor can be set to R x , and the multiple resistances constituting the Wheatstone bridge structure can be set to R1, R2, R3. At this time, R3 is connected in parallel to R4 as the variable resistance, and the equivalent resistance of R3 and R4 can be set to R th .

[0164] At this time, the value of R th is as Equation 1 below.

[0165] [Equation 1]

[0166]

[0167] In addition, when the values of R1, R2, and R th are known, the resistance value R x of the RTD sensor can be derived as Equation 2 below.

[0168] [Equation 2]

[0169]

[0170] Therefore, the temperature of the experimental sensor can be corrected by adjusting the variable resistance R4. That is, the control portion can correct the temperature of the experimental sensor by adjusting the variable resistance R4. In addition, the variable resistance R4 can also be manually adjusted by an engineer.

[0171] According to Figure 9 , a Wheatstone bridge circuit connected to the RTD sensor is shown. At this time, the Wheatstone bridge circuit can be understood as one example.

[0172] In addition, the equivalent resistance R can be derived as shown by including a correction constant as Equation 3 below.

[0173] [Equation 3]​

[0174]

[0175] wherein the correction constants a and b can be the same as Equations 4, 5.

[0176] [Equation 4]

[0177]

[0178] [Equation 5]

[0179]

[0180] wherein, is the amount of change per unit time of the temperature of the RTD sensor before correction, is the amount of change per unit time of the temperature of the R3, R4 resistors, at this time, the unit time can be 1 minute (60 seconds). In addition, the unit of the amount of temperature change can be degrees Celsius (°C).

[0181] [Experimental Example]

[0182] For the constant temperature bath according to the present application, when the correction constants a, b of the present application are applied, the resistance value R x of the RTD sensor can be corrected for the numerical difference due to the temperature change of the sensor itself and the temperature change of the resistance itself according to the flow of current. When there is a meaningful temperature change, the accuracy of the measured result value is expressed numerically, and can be as follows [Table 1].

[0183] [Table 1]

[0184]

[0185] The Table 1 is the accuracy score measured by a precision device, and the accuracy score when the correction constant is applied is significantly higher. The accuracy score can refer to the number of cases in which the calculated R x differs from the R x measured by the actual precision device within a predetermined range. That is, the accuracy can be the number of cases in which the error rate of R x is less than 0.7% out of 500 sample circuits, which is scored as 100 points.

[0186] The control portion 800 according to the present application maintains the optimal temperature range by the following process. That is, the control portion 800 according to the present application can learn the sensing value by the following K-center clustering process, and can control based on the learning result so that the temperature of the block portion 300 is maintained in the optimal temperature range.

[0187] The K-center clustering process according to the present application can extract precise temperature value data per unit time within a predetermined time. The control part 800 can extract any K data about the data. The precise temperature value can be a temperature value measured at a point of the block part 300 (especially, a central portion of the first block part).

[0188] The control part 800 generates a plurality of clusters centered on the K data, can extract each center value of the plurality of clusters. The control part 800 extracts an intermediate distance value between each center value, allocates data to a cluster having the shortest distance based on the intermediate distance value, and can update the center of the cluster including the allocated data.

[0189] However, in the present application, the intermediate distance value can refer to a distance value between clusters in a clustering process of generating the final two clusters.

[0190] At this time, the data can be coordinate data about a precise temperature value (℃) according to time (second, s).

[0191] At this time, the control part 800 can perform a K-center clustering process on the data, and can perform the clustering process according to Equation 6 representing the following Euclidean distance.

[0192] [Equation 6]

[0193]

[0194] where d is a distance value, (x, y) is a coordinate value, x corresponds to time (s), and y corresponds to a precise temperature value (℃).

[0195] According to Figure 10 , the x-axis as a feature 1 can correspond to time (s), and the y-axis as a feature 2 can correspond to a precise temperature value (℃). Cluster 1 about a shorter time (s) and a precise temperature value (℃) can mean a stable block part 300 state. Cluster 2 about a longer time (s) and a precise temperature value (℃) can mean an unstable block part 300 state. Each point is a size representing each time (s) and a precise temperature value (℃) in coordinates, and can mean a size at a specific time point.

[0196] The control part 800 according to the present application extracts a final distance value of cluster 1 and cluster 2, and can acquire / generate information about occurrence of an unstable state of the block part 300 based on the final distance value.

[0197] At this time, the final distance value according to the present application can be extracted in the following order.

[0198] (1) Extracting a first average value (x1, y1) of cluster 1 and a second average value (x2, y2) of cluster 2

[0199] (2) The first average value and the second average value are coordinate values, and a final distance value (L) between the first average value and the second average value is extracted based on Equation 7 below

[0200] [Equation 7]

[0201]

[0202] where (x1, y1) is a coordinate value generated based on the average value of cluster 1, and (x2, y2) is a coordinate value generated based on the average value of cluster 2.

[0203] In the present application, when the extracted final distance value (L) is greater than a predetermined distance value, it is determined that an unstable state occurs in the block part 300, and based on this, the control part 800 can derive the equivalent resistance R th .

[0204] In addition, the control part 800 according to the present application can extract different final distance values (L) according to the resistance ratio of the Wheatstone bridge of the constant temperature bath. This is referred to as a corrected final distance value (L') and can be extracted based on Equations 8 and 9 below.

[0205] [Equation 8]

[0206]

[0207] where (x1, y1) is a coordinate value generated based on the average value of cluster 1, and (x2, y2) is a coordinate value generated based on the average value of cluster 2.

[0208] [Equation 9]

[0209]

[0210] K is a constant, and can be a constant that optimizes the clustering result according to the situation. At this time, R1, R2, and R3 can be a plurality of resistances that constitute the above-described Wheatstone bridge structure. At this time, R3 can be a resistance connected in parallel with R4, which is a variable resistance.

[0211] Thus, when the unstable state of the block part 300 is determined based on the final distance value (L') corrected using Equations 8 and 9, the control part 800 according to the present application can control the effect of the constant temperature bath through more accurate control.

[0212] The above, the preferred embodiments of the present application are described in detail, but the scope of claims of the present application is not limited thereto, the various modifications and improvements of the person skilled in the art applying the basic concept of the present application limited by the scope of claims attached also belong to the scope of claims of the present application.

Claims

1. A temperature sensor correction device using a thermostat bath, wherein, Comprising: a housing portion, in which a hollow portion filled with a thermostat oil is formed inside, a cover portion, which seals the housing portion, a block portion, which is formed inside the housing portion, and is formed to penetrate the cover portion at a predetermined portion, a reference sensor and an experimental sensor, which are inserted into the block portion, a control portion, which controls circulation of the thermostat oil so that the temperature of the block portion is maintained within a prescribed range, and a correction circuit portion, which is used to correct the experimental sensor; the block portion comprises: a first block portion, which is cylindrical, and the diameter of the first block portion is smaller than the diameter of the housing portion, and the entire area of the first block portion is immersed in the thermostat oil, a second block portion, which is formed to contact and extend from the upper surface of the first block portion, and the diameter of the second block portion is smaller than the diameter of the first block portion, a third block portion, which is formed to contact and extend from the upper surface of the second block portion, the diameter of the third block portion is smaller than the diameter of the second block portion, and the third block portion penetrates from the inside to the outside of the cover portion, a fourth block portion, which is formed on the upper side of the third block portion and is threadedly combined with the third block portion, a fifth block portion, which is formed on the upper side of the fourth block portion, and the diameter of the fifth block portion is the same as the diameter of the third block portion, and a penetration groove, which penetrates the center of the first block portion to the fifth block portion; the upper side of the third block portion and the fourth block portion are formed to protrude to the outside of the upper side of the cover portion, a thread is formed on the outer peripheral surface of the upper side of the third block portion, a thread groove is formed on the inner peripheral surface of the fourth block portion, the thread is combined with the thread groove, thereby fixing the block portion and the cover portion to each other, the correction circuit portion comprises a Wheatstone bridge circuit, the experimental sensor comprises an RTD sensor, in which the resistance varies according to the temperature, the RTD sensor forms a bridge structure of the Wheatstone bridge circuit of the correction circuit portion, the Wheatstone bridge circuit comprises a variable resistor, the variable resistor is connected in parallel to one of a plurality of resistors forming a bridge structure in the Wheatstone bridge circuit, and fine tunes the one resistor.

2. The temperature sensor correction device using a thermostat according to claim 1, wherein: a rotating device is further included, which is provided in the hollow portion of the housing portion, and performs a rotating motion at the lower side of the hollow portion; the rotating device performs forced convection of the thermostat oil.

3. The temperature sensor correction device using a thermostat according to claim 2, wherein: the housing portion and the cover portion are vacuum heat treated.

4. The temperature sensor correction device using a thermostat according to claim 3, wherein: the temperature value of the experimental sensor is corrected in a manner corresponding to a preset value of the reference sensor.

5. The temperature sensor correction device using a thermostat according to claim 4, wherein: a circulation portion is further included, which is used to circulate the thermostat oil; the circulation portion comprises: an oil pipe, which is combined with the housing portion, and the thermostat oil flows through the oil pipe, a refrigerator, which cools the thermostat oil, a heat exchanger, which exchanges heat of the thermostat oil flowing into the refrigerator, and a A pump generates a driving force for circulating the constant-temperature tank oil filled into the hollow portion of the housing portion.

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