CN216925854U - Temperature calibration device - Google Patents

Abstract

The utility model provides a temperature calibration device, which comprises a positioning support, a cantilever assembly, a driving motor and a controller, wherein the positioning support is vertically arranged, the cantilever assembly is horizontally arranged, the controller is electrically connected with the driving motor and controls the driving motor, and the cantilever assembly comprises a first cantilever, a second cantilever and a cantilever positioning part; the first cantilever is provided with a sensor fixing part for fixing a temperature sensor; one end of the second cantilever is hinged with the first cantilever, so that the first cantilever can horizontally rotate relative to the second cantilever, and the other end of the second cantilever is hinged with the cantilever positioning part, so that the second cantilever can horizontally rotate relative to the cantilever positioning part; the driving motor drives the cantilever positioning part to vertically move along the positioning bracket. The design of the utility model can control the moving distance of the temperature sensor more accurately, and can compensate and adjust the horizontal position of the fixed part of the sensor in the control process, thereby taking high efficiency, personnel safety and equipment safety into consideration.

Description

Temperature calibration device

Technical Field

The utility model relates to the technical field of temperature metering calibration, in particular to a temperature calibration device for calibration of a dry body furnace or calibration of a temperature sensor.

Background

The dry body furnace, also called dry well furnace, is a kind of common temperature source equipment in the field of measurement calibration, generally, the dry body furnace will be disposed with an axial temperature field of vertical direction (up-down direction), the bottom of the dry body furnace axial temperature field is closed, the top of the dry body furnace axial temperature field is equipped with the fire door, devices such as temperature sensor can be put into the temperature field of the dry body furnace through the fire door to carry out measurement test, according to the specific use and configuration difference, the dry body furnace can provide the temperature field of-40 ℃ -1200 ℃ or even lower or higher temperature, compared with the equipment such as liquid bath, tubular furnace, etc., the dry body furnace has the advantages of fast temperature control speed, small volume and portability, and is widely applied to the field temperature calibration, and has no wrong performance under the environment such as laboratory, etc.

The temperature sensor is used for measuring temperature and generating an electric signal for representing the temperature, common temperature sensors comprise a thermocouple, a thermal resistor and the like, due to the material characteristics, the working characteristics and the like, most of the temperature sensors used in the field of measurement and calibration are of a slender shape and are also called temperature probes (probes) at some times, and from the perspective of specific use working conditions, on one hand, the temperature sensors can measure or calibrate other temperature equipment devices under the condition of sufficient accuracy, and on the other hand, in order to ensure that the measurement and calibration results of the temperature sensors are accurate enough, the temperature sensors need to be verified or calibrated.

In order to ensure that a temperature field provided by a dry body furnace meets requirements, the dry body furnace needs to be calibrated, generally, the calibration process comprises the steps of extending a temperature sensor from a furnace mouth of the dry body furnace, enabling a temperature sensing part of the temperature sensor to be located at a specified position of the temperature field of the dry body furnace, controlling the temperature of the dry body furnace to rise to a specific temperature, obtaining a control temperature value and an actual temperature value of the dry body furnace (the actual temperature value is provided by the temperature sensor serving as a standard), judging according to the deviation of the control temperature value and the actual temperature value, and inevitably performing two operations: the temperature sensor is arranged in the dry body furnace and taken out of the dry body furnace.

In the prior art, manual operation is generally adopted, and the method faces the following risks or problems:

1) the working voltage of the dry body furnace is high (the common dry body furnace products in China generally use 220V or 380V as the working voltage), and in order to ensure the uniformity of the temperature field, the temperature field is wrapped by materials with good heat conduction conditions, such as some metal alloys, these metal alloys often have conductivity, and in addition, in order to further improve the uniformity of the internal temperature field of the dry body furnace during operation, some liquid media may be injected in an auxiliary manner, these liquid media may be present outside the furnace mouth for various reasons (dripping, spilling during injection, carry-over during handling of the temperature sensor, etc.), and are generally also electrically conductive, due to the above circumstances, once the electric isolation of the electric temperature control device is damaged or broken down, the temperature sensor arranged in the dry body furnace can carry high voltage, and at the moment, the direct manual operation can cause electric shock risk;

2) the temperature inside the dry body oven may be very high (e.g. up to 1000 c) and correspondingly the temperature of the temperature sensor measuring it may also be very high, with the risk of scalding by direct manual operation for such high temperatures or for the movement of objects where high temperatures may exist.

Based on the above risks, the conventional method in the prior art is to manually place a temperature sensor in a work preparation stage, stop the work of a high-pressure temperature control device after the work is completed, and simultaneously cool the temperature by air cooling and other measures, and take out the temperature sensor after a period of time when the temperature in the dry body furnace is close to the ambient temperature.

In order to solve the foregoing problems, there is a motivation in the prior art to design a calibration or positioning device to provide operational support for picking, placing, and moving a temperature sensor in a dry body furnace, for example, a tubular structure furnace chamber temperature field distribution detection device, which includes a lifting stepping motor, a flange, a coupling, a fixed support, a guide rail, a slider, a screw rod, a moving support, a rotating stepping motor, a rotating shaft, a detector mounting platform, a first probe and a second probe; the lifting stepping motor is arranged on an upper flange of the fixed support and is connected with the screw rod through a coupler, the slide block is connected in series on the screw rod, and the side surface of the slide block is connected with a guide rail arranged on the back surface of the fixed support; one end of the movable support is arranged on the side surface of the sliding block, the upper part of the other end of the movable support is provided with a rotary stepping motor, the rotary stepping motor is connected with one end of the rotating shaft, and the other end of the movable support is connected with a detector mounting platform.

However, in the practical use process of the above solution, the problems to be considered and solved still exist: from the positioning of the temperature sensor in the horizontal direction, theoretically, the positioning and the insertion in the horizontal direction can be realized as long as the horizontal relative position of the lower end of the temperature sensor is found accurately and the horizontal relative position of the hole in the dry body furnace, which is required to be inserted into the temperature sensor, is adjusted to be coincident, however, the horizontal positioning and the insertion can be realized, the difficulty exists in finding the relative position per se, due to the problem of manufacturing consistency, even if the dry body furnace is the same in model, due to the deviation of the shell structure of the furnace body, the deviation exists in the position of the furnace liner, the deviation exists in the structure of the furnace liner, the deviation exists in the soaking block arranged in the furnace liner, and the like, the result is that, only by means of manufacturing standard data, even if the dry body furnace and the soaking block are completely required to be arranged, the horizontal position of the temperature sensor in the horizontal direction and the horizontal position which is required to be arranged cannot completely correspond to each other due to the existence of the deviation (or the existence of the deviation inevitably leads to the incompletely correspond to the occurrence of the condition that the incomplete correspondence occurs ) And this incomplete correspondence is not predictable by the user (the manufacture of the various structures and components is completely acceptable), at this point, if implemented according to the aforementioned prior art solution, when the deviation is small, the displacement/wear occurs between the temperature sensor and the heat spreader with respect to the deviation portion, resulting in a substantial reduction in the service life of the temperature sensor, a reduction in the measurement accuracy of the temperature sensor, and when the deviation is large, a rigid collision occurs between the temperature sensor and the heat spreader, and the temperature sensor is damaged.

Furthermore, for the temperature sensor with a slender shape, either because of the existence of manufacturing tolerance or because of long-term use, it may result in the fact that the temperature sensor cannot extend along an absolute straight line, but more or less may have some bending, deflection or other similar deformation problems, whereas the prior art solution is essentially a straight-up and straight-down positioning manner, which may result in that, alternatively, the position of the lower end of the temperature sensor is not aligned with the required arrangement position, thereby preventing the temperature sensor from being inserted, or, after the temperature sensor is inserted, because the fixed end of the temperature sensor is still configured according to the horizontal position before the temperature sensor is inserted, thereby making the non-inserted part of the temperature sensor in an "over-bent" state, so that the temperature sensor is continuously in a "tensed and deformed" state, thereby affecting the service life of the temperature sensor, the serious person can lead to the temperature sensor to break (the temperature sensor rigidity is stronger, or the deviation degree is great), this problem of the prior art scheme is wanted to be solved, either, change the control of device from full-automatic to semi-automatic, namely after every section of temperature sensor inserts, adjust horizontal position according to its "tight deformation" condition by the manual work, insert a section of temperature sensor again, or, treat the whole shape of the temperature sensor who inserts earlier before measuring and measure, model building, analysis, form the deformation orbit in the temperature sensor insertion process, insert process control according to deformation orbit again, former mode work efficiency is low down, the latter mode realizes that the degree of difficulty is great, it is with high costs to realize, both modes are not the industrialized better choice among the prior art.

The foregoing problems to be considered and solved result in that, although the prior art does exist with automated solutions, the skilled person cannot properly use the automated solutions until they fail to solve the related problems, because either inaccurate metering results or damage to the temperature sensor is an unacceptable situation to be expected by the skilled person.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved is as follows: the existing positioning/calibrating device has risks and poor arrangement precision due to manual operation or is difficult to overcome structural deviation, and equipment is easy to damage.

The application provides a temperature calibration device, which comprises a positioning support, a cantilever assembly, a driving motor and a controller, wherein the positioning support is vertically arranged, the cantilever assembly is horizontally arranged, and the controller is electrically connected with the driving motor and controls the driving motor;

the cantilever assembly comprises a first cantilever, a second cantilever and a cantilever positioning part;

the first cantilever is provided with a sensor fixing part for fixing a temperature sensor;

one end of the second cantilever is hinged with the first cantilever, so that the first cantilever can horizontally rotate relative to the second cantilever, and the other end of the second cantilever is hinged with the cantilever positioning part, so that the second cantilever can horizontally rotate relative to the cantilever positioning part;

the driving motor drives the cantilever positioning part to vertically move along the positioning support.

Preferably, the sensor fixing part comprises a sensor through hole which is vertically penetrated, and a micro switch which is arranged near the upper end face of the sensor through hole, the micro switch generates an electric signal when the upper surface of the micro switch is pressed, and the micro switch is electrically connected with the controller; the temperature sensor comprises a temperature sensing section and a limiting section, the temperature sensing section of the temperature sensor can be arranged in the sensor through hole in a penetrating mode, and the limiting section of the temperature sensor can be arranged in the microswitch in a pressing mode.

Preferably, when temperature calibration data is acquired, at least part of the temperature sensing section of the temperature sensor penetrates through the sensor through hole and is located below the sensor through hole, and the limiting section of the temperature sensor is located above the sensor through hole and is in pressure joint with the upper surface of the microswitch.

Preferably, the positioning support comprises a vertically extending guide mechanism, at least part of the cantilever positioning portion is connected with the guide mechanism, and the driving motor drives the cantilever positioning portion to move along the guide mechanism.

Preferably, the temperature sensor further comprises a weight member, and the weight member is arranged on the temperature sensor.

Preferably, the device also comprises a device base, the positioning support is fixedly arranged on the device base, a temperature source arrangement area is arranged on one side of the positioning support of the device base, and the height of the temperature source arrangement area is 60cm-120 cm.

Preferably, a power distribution assembly is arranged in the device base, the power distribution assembly is electrically connected with the controller, the driving motor and the temperature source equipment respectively, and the controller is electrically connected with the temperature source equipment.

Preferably, the temperature calibration device is a dry body furnace temperature zone calibration device, the temperature sensor is a first standard temperature sensor, the temperature calibration device further comprises a second standard temperature sensor, a temperature equalization block is arranged in the temperature zone of the calibrated dry body furnace, a first blind hole and a second blind hole are arranged on the equalization block, during calibration, the second standard temperature sensor is inserted in the second blind hole, a temperature sensing section of the second standard temperature sensor is contacted with the bottom surface of the second blind hole, and the first standard temperature sensor is inserted in the first blind hole.

Preferably, the first reference temperature sensor includes a first position where the temperature sensing section of the first reference temperature sensor is in contact with the bottom surface of the first blind hole, and a second position where the temperature sensing section of the first reference temperature sensor is at a predetermined distance from the bottom surface of the first blind hole.

Preferably, the temperature calibration device is a sensor calibration device, the temperature sensor is calibrated temperature sensor and/or standard temperature sensor, a temperature zone of the calibrated dry body furnace is internally provided with a soaking block, the soaking block is provided with a blind hole, and during calibration, the temperature sensor is inserted into the blind hole and is contacted with the bottom surface of the blind hole.

Has the advantages that:

1) the temperature sensor is placed in and taken out of the temperature source equipment through mechanical execution, manual touch under the high-temperature electrified condition is avoided, compared with manual displacement, the displacement controlled by the motor is more accurate in control over the moving distance of the temperature sensor, and high efficiency and personnel safety are both considered;

2) the arrangement of the cantilever assembly can enable the horizontal relative position of the sensor fixing part to be adjustable, so that the adjustment requirements of the arrangement positions of different temperature sensors are met, and can also enable the position of the sensor fixing part to be compensated and adjusted by the temperature sensor according to the stress/deformation condition of the temperature sensor when the driving motor drives the temperature sensor to move, so that the temperature sensor is prevented from being deformed under pressure due to the stress of the temperature sensor at the arrangement position and the sensor fixing part, and the safety of equipment is guaranteed;

3) in the preferred scheme, still through micro-gap switch's setting, can guarantee on the one hand that temperature sensor can not receive the compulsory fixed force when the vertical direction overshoots, avoided the damage to temperature sensor, on the other hand can accurately judge temperature sensor's position state through micro-gap switch's state, both can be used for the position location to temperature sensor, can be used for in time discovering the problem when temperature sensor abnormal movement is obstructed again, has compromise high efficiency and equipment safety.

Drawings

FIG. 1 is a schematic front (rear) sectional view of an exemplary temperature calibration device.

FIG. 2 is a schematic diagram of the connection of an exemplary temperature calibration device.

Fig. 3 is a schematic front (rear) sectional view of a further exemplary temperature calibration device.

Fig. 4 is a schematic diagram of a connection of a further exemplary temperature calibration device.

Fig. 5 is a schematic top view of a partial structure of a further exemplary temperature calibration device.

Fig. 6 is a schematic front (rear) sectional view of a further exemplary temperature calibration device.

Fig. 7 is a schematic diagram of a connection of a further exemplary temperature calibration device.

Fig. 8 is a schematic front (rear) sectional view of a further exemplary temperature calibration device.

Fig. 9 is a schematic diagram of a connection of a further exemplary temperature calibration device.

Fig. 10 is a schematic top view of a partial structure of a further exemplary temperature calibration device.

Fig. 11 is a schematic perspective view of a further exemplary temperature calibration device.

Fig. 12 is a partially enlarged view of fig. 11 in a region a.

Reference numerals:

100. the device comprises a positioning support, 110, a guide groove, 111, a transmission gear, 120, a guide post, 210, a first cantilever, 211, a sensor fixing part, 212, a sensor through hole, 213, a microswitch, 214, a standard device through hole, 220, a second cantilever, 230, a cantilever positioning part, 231, a positioning tooth, 241, a first rotating shaft, 242, a second rotating shaft, 300, a driving motor, 400, a controller, 410, a device base, 420, a power distribution assembly, 430, a control console, 421, an external power interface, 510, a first temperature sensor, 511, a temperature sensing section (of the first temperature sensor), 512, a limiting section (of the first temperature sensor), 513, a counterweight part, 520, a second temperature sensor, 550, a temperature source device, 551, a first temperature measuring blind hole, 552, a second temperature measuring blind hole, 553 and a heat equalizing block.

Detailed Description

The present application is described in detail below, and if a detailed description of known techniques is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Detailed description of the preferred embodiment

And the temperature calibration device is used for assisting the positioning, the putting in and the taking out between the temperature source equipment and the temperature sensor so as to finish the temperature calibration operation.

Temperature source device, comprising the following features: 1) the temperature source equipment can be heating equipment, refrigerating equipment or the combination of the heating equipment and the refrigerating equipment; 2) the temperature source equipment comprises at least one axial temperature field arranged along the vertical direction (up and down direction), the axial temperature field is positioned in a temperature-controlled cavity, the upper end of the cavity is provided with an opening for placing a temperature sensor and the like, and the lower end of the cavity is closed or at least closed during metering and calibrating operation; 3) the temperature source equipment is used for metering calibration, can provide a temperature field meeting specific temperature requirements, and also needs to be calibrated according to the metering calibration specification; the temperature source equipment is typically a dry body furnace, and can also be other similar temperature source equipment.

Temperature sensor, comprising the following features: 1) the whole shape is slender; 2) the temperature sensor is provided with a temperature sensing section, and the temperature sensing section is positioned at one end of the temperature sensor and a section of area near the end of the temperature sensor.

As an example, as shown in fig. 1 and 2, the temperature calibration apparatus includes a positioning bracket 100, a cantilever assembly, a driving motor 300, and a controller 400.

The cantilever assembly, which is horizontally arranged (i.e. extending in the horizontal direction) as a whole, includes a first cantilever 210, a second cantilever 220 and a cantilever positioning portion 230; the first cantilever 210 is provided with a sensor fixing part 211, and the sensor fixing part 211 is provided with a fixing structure matched with the first temperature sensor 510 and used for fixing the first temperature sensor 510; the second cantilever 220 is located between the first cantilever 210 and the cantilever positioning portion 230, the first end of the second cantilever 220 is hinged to the first cantilever 210 through the first rotating shaft 241, the axial direction of the first rotating shaft 241 is a vertical direction, and because the second cantilever 220 and the first cantilever 210 are both horizontally arranged, the first cantilever 210 can rotate in a horizontal direction relative to the second cantilever 220 through the first rotating shaft 241; the second end of the second cantilever 220 is hinged to the cantilever positioning portion 230 through the second rotating shaft 242, the axial direction of the second rotating shaft 242 is a vertical direction, and since the second cantilever 220 and the cantilever positioning portion 230 are both horizontally arranged, the second cantilever 220 can rotate in a horizontal direction relative to the cantilever positioning portion 230 through the second rotating shaft 242.

The positioning bracket 100 is vertically disposed (i.e., extends in the up-down direction) and is used for providing a reference/guiding function in the vertical moving direction for the cantilever assembly/cantilever positioning portion 230, the driving motor 300 drives the cantilever positioning portion 230 to vertically move along the positioning bracket 100, and on this basis, there are many different implementations or implementations, for example, the positioning bracket 100 may be a vertically disposed guiding column, the cantilever positioning portion 230 is sleeved on the column structure of the positioning bracket 100, the driving belt is connected to the driving motor 300 and the cantilever positioning portion 230 respectively, the driving motor 300 rotates in the forward/direction to drive the driving belt to move in the forward/reverse direction, the cantilever positioning portion 230 is fixed in a partial region and a partial region of the driving belt, and therefore, the driving belt can move along with the movement of the driving belt, because the driving belt is disposed along the extending direction of the positioning bracket 100, therefore, it is defined that, when the driving motor 300 moves in the forward direction, the cantilever positioning portion 230 is driven to move upward, and when the driving motor 300 moves in the reverse direction, the cantilever positioning portion 230 is driven to move downward; there are other various prior art implementations for achieving the above technical effect, and those skilled in the art can also obtain various technical solutions based on the above examples, combinations of the examples, the technical effects thereof, and the like, which are not described herein in detail.

The driving motor 300 drives the cantilever positioning portion 230 to move vertically (upward or downward) along the positioning bracket 100 through a transmission mechanism.

The controller 400 is electrically connected to the driving motor 300 and controls the driving motor 300.

During operation, the first temperature sensor 510 is arranged on the sensor fixing part 211, the temperature source equipment 550 is arranged beside the positioning support 100, the driving motor 300 is controlled to drive the cantilever positioning part 230 to ascend, and then the first temperature sensor 510 is driven to ascend until the lower end of the first temperature sensor 510 is higher than the upper end of the temperature source equipment 500, the first cantilever 210 and/or the second cantilever 220 are/is moved until the lower end of the first temperature sensor 510 is aligned with the upper end surface of the first temperature measuring blind hole 551 on the temperature source equipment 500 (so that the horizontal plane projection of the lower end of the first temperature sensor 510 is coincident with the horizontal plane projection of the first temperature measuring blind hole 551);

the driving motor 300 is controlled to drive the cantilever positioning portion 230 to move downwards, so as to drive the first temperature sensor 510 to move downwards and be inserted into the first temperature measuring blind hole 551, and the preset temperature can be set in the controller 400 if the distance that the first temperature sensor 510 needs to move downwards is known in advance, and the driving motor 300 is controlled to drive the cantilever positioning portion 230 to move downwards for a specified distance, so as to drive the first temperature sensor 510 to reach a specified position, so that the temperature measurement calibration operation is performed;

in the process of temperature measurement calibration, if the first temperature sensor 510 needs to be moved, since the moved position is also located in the first blind temperature measuring hole 551, only the displacement parameters (including the moving direction and the moving length) between the moved position and the pre-moved position need to be given, the displacement parameters can be input in the controller 400, the controller 400 controls the driving motor 300, and the driving motor 300 moves the cantilever positioning portion 230 according to the displacement parameters, so as to achieve the desired new position.

Compare in prior art's manual operation, adopt driving motor 300 to drive cantilever location portion 230 and remove to the assigned position in this scheme to it is more accurate to make the location, and owing to be mechanical drive, does not relate to personnel and directly or indirect contact temperature sensor 510, consequently, even temperature source equipment 550 is in the course of the work (electrified and high temperature), also can not have manual operation's among the prior art risk.

To more particularly illustrate the advantages of this example, the simplified model is described below.

The deformation of the first temperature sensor 510 is unknown, and in an extreme case, the deformation of the first temperature sensor 510 in each segment is considered to be different and irregular, so the sum of the radial deformations of the first temperature sensor 510 between two points thereof can be set as the following formula 1:

in the formula 1, h_mAnd h_nAxial coordinates of two points on the first temperature sensor, i.e., ordinate when the first temperature sensor 510 is placed as vertically as possible (placed vertically by gravity), Δ w represents the sum of radial deformations of two vertical points, i.e., the difference between abscissa of two points when the first temperature sensor 510 is placed as vertically as possible (placed vertically by gravity), and f (h) represents a radial deformation function at a position corresponding to the axial (longitudinal) direction.

When the first temperature sensor 510 is fixed to the sensor fixing portion 211, the first temperature sensor 510 has only the unique force point except for gravity, and the coordinates of the lower end portion of the first temperature sensor 510 are (0,0) and the coordinates of the fixing position of the first temperature sensor 510 (i.e., the position of the sensor fixing portion 211) are (w)₁,h₁) From equation 1, it can be seen that:

when the first temperature sensor 510 is just inserted into the first blind temperature measuring hole 551, it is necessary to ensure that the lower end of the first temperature sensor 510 is aligned with the first blind temperature measuring hole 551, and therefore, in this state, the horizontal position of the sensor fixing portion 211 needs to be adjusted to w₁；

When the first temperature sensor 510 is inserted into the first blind temperature measuring hole 551 for a certain depth l, the first temperature sensor 510 is exposed out of the first blind temperature measuring hole 551 for h₁At this time, in the present example, due to the existence of the cantilever assembly structure, the first temperature sensor 510 is still in a horizontal unstressed state at the sensor fixing portion 211, and the horizontal stress is limited to the position of the opening of the first temperature measuring blind hole 551, so that the combination of formula 1 can obtain:

as can be seen from formula 3, since a part of the first temperature measuring blind hole 551 is inserted, the exposed part of the first temperature sensor 510 outside the first temperature measuring blind hole 551 is less than the state just inserted, and accordingly, the sensor fixing portion 211 should be adjusted, one of the technical advantages of this example is that, due to the stress in the vertical direction, the horizontal position of the sensor fixing portion 211 caused by different insertion depths is automatically adjusted, and the control of the sensor fixing portion 211 under the condition that the specific deformation condition is unknown is realized for various deformation conditions (within the allowable use range).

On the contrary, if the prior art is adopted, it can be known from the combination of formula 3 and formula 2 that the sensor fixing portion 211 is locked to w in the horizontal position₁(i.e., kept in a straight-up and straight-down state), therefore, a dimension w exists between the actual fixing position and the ideal fixing position of the sensor fixing portion 211₁(l) Due to the rigidity of the sensor fixing portion 211 in the horizontal direction in the prior art, the first temperature sensor 510 is stressed at two different points in opposite directions, so that the first temperature sensor 510 is forced to be weakly deformed or even damaged.

There is still further room for improvement in the foregoing examples, and in order to accurately insert the first temperature sensor 510 into a given position, it is necessary to know the relative position of the first temperature sensor 510 before insertion, the relative position of the desired insertion, and then determine the displacement parameter according to the two relative positions, and it is difficult for the controller 400 to determine the relative position of the desired insertion, because, in many cases, the temperature calibration device and the temperature source device 550 are not integrated, or there are multiple temperature source devices 550 with respect to the same temperature calibration device, and the desired insertion relative positions of the different temperature source devices 550 are often different although they are similar in general structure.

For example, the temperature source device 550 is a dry body oven including a device housingThe height (length from bottom to top) of the equipment housing is l₁The temperature chamber is fixed in a chamber enclosed by the equipment shell, and the well depth of the temperature chamber (namely the distance from the bottom of the temperature chamber to the top of the equipment shell) is l₂The soaking block is arranged in the temperature chamber, and in the final working state, the bottom of the soaking block is in contact with the bottom of the temperature chamber (in the figure, the bottom of the soaking block and the temperature chamber are separately shown for clearly distinguishing the temperature chamber space and the soaking block, the figure state is not the final working state), and the axial length of the soaking block is l₃The hole opening of the first temperature measuring blind hole is arranged at one end of the soaking block and extends along the axial direction of the soaking block, and the hole depth of the first temperature measuring blind hole is l₄Since the temperature sensing section is located at the lower portion of the first temperature sensor, the expected insertion position is the bottom of the first temperature measuring blind hole, and if the distance between the bottom of the first temperature sensor 510 (i.e. the position of the temperature sensing section) and the bottom of the temperature source device 550 is known to be l₅It can be known that the vertical distance that the sensor fixing part 211 (cantilever assembly) needs to control the movement of the first temperature sensor 510 is:

L＝l₅-(l₁-l₂+l₃-l₄) Equation 4

There are two sources for each parameter in equation 4: one is that theoretical data (manufacturing data) given at the factory/manufacturing stage is calculated according to formula 4 to obtain configuration parameters, and theoretically, control is performed according to the configuration parameters to enable the first temperature sensor 510 to just reach a desired insertion position, but actually, deviations often exist between the manufacturing data and actual data, and causes the deviations include but are not limited to manufacturing tolerances of structures of components, and the calculated configuration parameters accumulate the deviations of the data, so that the deviations may have larger deviations with actually required control data and cannot meet the requirements well; the second is actual measurement data, which eliminates deviation in factory theoretical data as much as possible, but requires measurement steps, and for the temperature source device 550, many lengths (for example, the hole depth of the first temperature measurement blind hole 551) are not well measured, and manual work and other special equipment are needed to be involved, so that the efficiency is low.

In a second example, as shown in fig. 3 and 4, the modified area is mainly concentrated on the sensor fixing portion 211, specifically, the sensor fixing portion 211 includes a vertically penetrating sensor through hole 212, the first temperature sensor 510 includes a temperature sensing section 511 with a smaller outer diameter and a limiting section 512 with a larger outer diameter, the hole diameter of the sensor through hole 212 is greater than or equal to the outer diameter of the temperature sensing section 511 and smaller than the outer diameter of the limiting section 512, when the first temperature sensor 510 is disposed, the temperature sensing section 511 faces downward and passes through the sensor through hole 212 until the upper end face of the sensor through hole 212 reaches the lower end face of the limiting section 512, and due to the influence of gravity on the first temperature sensor 510, the limiting section 512 cannot pass through the sensor through hole 212 unless other external forces are applied, so that the first temperature sensor 510 is fixed by the sensor through hole 212.

A micro switch 213 is further arranged near the upper end face of the sensor through hole 212, the position of the micro switch 213 is close enough to the position of the upper end face of the sensor through hole 212, or the outer diameter of the limiting section 512 is large enough, so that when the temperature sensing section 511 of the first temperature sensor 510 passes through the sensor through hole 212, at least a partial area (close to the direction of the micro switch 213) of the limiting section 512 can contact a partial area (close to the direction of the sensor through hole 212) of the micro switch 213; at this time, the stopper section 512 applies a pressure to the micro switch 213 at a position contacting the micro switch 213 due to the influence of gravity.

The microswitch 213, which generates an electrical signal when its upper surface is pressed, can be implemented in a variety of ways:

in one implementation, a pressure sensor is disposed in the micro switch 213, the pressure sensor generates a pressure signal based on a pressure on the upper surface of the micro switch 213, the micro switch 213 is electrically connected to the controller 400, so that the pressure signal generated by the pressure sensor reaches the controller 400, the controller 400 is configured to analyze the pressure signal, when a pressure value represented by the pressure signal is zero (or less than or equal to a certain set value), it indicates that the micro switch 213 is not pressurized, that is, the limiting section 512 and the micro switch 213 are not in contact or have just been in contact without applying pressure, and when the pressure value represented by the pressure signal is not zero (or greater than or equal to a certain set value), it indicates that the micro switch 213 is pressurized, that is, the limiting section 512 is pressurized on the micro switch 213; the realization mode actually takes continuous analog electric signals as switching values to be identified and used;

in another implementation manner, a metal plectrum is arranged on the upper surface of the micro switch 213, the metal plectrum is located in a signal loop built in the micro switch 213 and forms a loop switch, when the metal plectrum is pressed down, the loop is closed and conducted, the micro switch 213 generates a pressure electric signal, when the metal plectrum is not pressed, the loop is not closed and disconnected, the micro switch 213 does not generate a pressure electric signal, the micro switch 213 is electrically connected with the controller 400, so that the electric signal reaches the controller 400, the controller 400 is configured to analyze the pressure electric signal, if the pressure electric signal exists, the micro switch 213 is pressed, that is, the limit section 512 is pressed on the micro switch 213, otherwise, if the pressure electric signal does not exist, the micro switch 213 is not pressed, that is, the limit section 512 and the micro switch 213 are not contacted or just contacted, but not pressed;

in another implementation manner, if the first temperature sensor 510 has a conductive metal sheet on its lower end surface, and the micro switch 213 has a loop with a break point on its upper surface, where the break point of the loop corresponds to the conductive metal sheet of the first temperature sensor 510, when the first temperature sensor 510 is pressed on the micro switch 213, the conductive metal sheet and the break point of the loop are in full contact, the loop is turned on, and the micro switch 213 generates a pressure electrical signal, and when the first temperature sensor 510 and the micro switch 213 are not in contact, the loop is kept off, the micro switch 213 does not generate a pressure electrical signal, and the micro switch 213 is electrically connected to the controller 400, so that the electrical signal reaches the controller 400, and the controller 400 is configured to analyze the pressure electrical signal, if the pressure electrical signal exists, it indicates that the micro switch 213 is pressed, i.e. the limit section 512 is pressed on the micro switch 213, otherwise, if no pressure electric signal exists, the microswitch 213 is not pressed, namely the limit section 512 is not contacted with the microswitch 213;

in the prior art, there are many implementation manners, which are not described herein any more, and in general, when the upper surface of the micro switch 213 is pressed, an electrical signal is generated, the micro switch 213 is electrically connected to the controller 400, and the electrical signal of the micro switch 213 can reach the controller 400, so that the controller 400 can confirm the pressed condition of the micro switch 213.

During the measurement calibration operation, the first temperature sensor 510 is fixed to the sensor fixing portion 211, the temperature sensing section 511 of the first temperature sensor 510 penetrates through the sensor through hole 212 and is influenced by gravity, the limiting section 512 of the first temperature sensor 510 is pressed on the microswitch 213, the microswitch 213 generates an electric signal and transmits the electric signal to the controller 400, and the controller 400 determines that the first temperature sensor 510 is configured, and can drive the first temperature sensor 510 to move according to a preset displacement parameter;

obviously, in this process, the micro switch 213 can be used as a generation mechanism of the configuration completion signal, so as to avoid the situation that the first temperature sensor 510 is not configured, and the controller 400, i.e., the controller driving motor 300, starts to operate.

In the process that the driving motor 300 drives the cantilever positioning portion 230 to move (at this time, the moving target of the displacement parameter is not achieved), if the first temperature sensor 510 moves from top to bottom, when the aperture of the first temperature measuring blind hole 551 is small, or the deformation amplitude of the first temperature sensor 510 is large, or the outer surface of the first temperature sensor 510 and the inner surface of the first temperature measuring blind hole 511 are adhered under the high temperature/low temperature environment, an upward resistance may be generated to the first temperature sensor 510, if the resistance is greater than or equal to the gravity (the moment of overcoming the inertia is greater than the gravity, and is equal to the gravity when stable), the first temperature sensor 510 is in a stress balance state and does not move down, the cantilever positioning portion 230 moves down continuously and drives the sensor fixing portion 211 to move down continuously, the micro switch 213 is separated from the limit section 512 of the first temperature sensor 510, and the upper surface of the micro switch 213 is not pressed any more, the micro switch 213 does not generate an electric signal or generate an electric signal different from the electric signal generated when the micro switch is pressed, and the micro switch 213 is electrically connected with the controller 400, so that the controller 400 can immediately acquire the change condition of the switch, stop the continuous work of the driving motor 300 and/or give a prompt to a user;

obviously, in the process, the micro switch 213 functions as a detector, and when the first temperature sensor 510 does not move according to the preset condition, the micro switch 213 can detect and feed back the problem in real time, so as to avoid the problem that the driving motor 300 has achieved the displacement target, but the actual first temperature sensor 510 does not move to the designated position.

If the temperature source device 550 is a dry body furnace or the like, since the temperature field to be measured is located at the bottom of the whole chamber, that is, the temperature sensing section of the first temperature sensor 510 needs to be in contact with the bottom of the chamber, the prior art scheme can achieve this purpose either manually by a human being, or by inputting parameters in advance, and this example scheme is different from this example scheme in that the first temperature sensor 510 can reach the bottom of the chamber without manually inputting or inputting parameters in advance through the configuration of the micro switch 213, specifically:

the driving motor 300 drives the cantilever positioning portion 230 to continuously move downwards, if the first temperature sensor 510 is normally fixed on the sensor fixing portion 211, the limit section 512 of the first temperature sensor 510 is continuously pressed on the micro switch 213, and so on, when the bottom of the first temperature sensor 510 reaches the bottom of the first temperature measuring blind hole 551, the limit section 512 of the first temperature sensor 510 is just pressed on the micro switch 213, the bottom of the first temperature sensor 510 and the bottom of the first temperature measuring blind hole 551 are in a state of proper contact (no stress), at the next moment, the cantilever positioning portion 230 continuously moves downwards, so the micro switch 213 continuously moves downwards, the bottom of the first temperature sensor 510 is supported by the bottom of the first temperature measuring blind hole 551, the first temperature sensor 510 does not move downwards any more, the limit section 512 of the first temperature sensor 510 is not pressed on the micro switch 213 any more, and the two are separated, the electric signal generated by the micro switch 213 changes, and the controller 400 acquires the change;

in one of the following processing modes, when acquiring the change of the electric signal of the micro switch 213, the controller 400 immediately controls the driving motor 300 to stop the continuous downward movement of the cantilever positioning portion 230, at this time, theoretically, the first temperature sensor 510 is in the next moment state just contacting with the bottom of the first temperature measurement blind hole 551, and the controller 400 controls the driving motor 300 to reversely drive at the minimum moment, so that the state reached after the reverse driving is that the bottom of the first temperature sensor 510 and the bottom of the first temperature measurement blind hole 551 are in the state just contacting, that is, the position state expected to be reached;

in another mode of the subsequent processing, if the controller 400 has a clock circuit built therein and performs timing when the electric signal of the micro switch 213 is acquired, the controller 400 can acquire the time T when the first temperature sensor 510 and the micro switch 213 are just disengaged₁Immediately, the driving motor 300 is controlled to stop the downward movement of the arm positioning part 230, and the time T when the arm positioning part 230 stops the downward movement is recorded₂At this time, theoretically, if the driving of the boom positioning part 230 by the driving motor 300 is performed at a constant speed, the T is driven in the reverse direction (the boom positioning part 230 is controlled to move upward)₂-T₁After the moment +1, the bottom of the first temperature sensor 510 and the bottom of the first temperature measuring blind hole 551 can be in a state of right contact, namely a position state expected to be reached;

in another way of the subsequent processing, when the controller 400 obtains the change of the electrical signal of the micro switch 213 (indicating that the micro switch 213 is no longer pressed), it continuously controls the driving motor 300 to move the cantilever positioning portion 230 downward for a short distance, so that the sensor fixing portion 211 and the first temperature sensor 510 reach a determined completely separated state, and reversely controls the driving motor 300 to move the cantilever positioning portion 230 upward until the micro switch 213 generates an electrical signal to represent that the upper surface of the micro switch is pressed, and immediately stops the continuous movement of the cantilever positioning portion 230, at this time, the limit section 512 of the first temperature sensor 510 and the micro switch 213 are in a state of being pressed by a right force, that is, a position state expected to be reached is reached; compared with the first two methods, this method has the advantages that the first temperature sensor 510 can be controlled to move down quickly, and then move up at a slower speed when the driving motor 300 is controlled in a reverse direction, so that the accuracy and speed of position recognition are both guaranteed.

Example three, further improved on the basis of example two, an operation posture when calibration is performed using the temperature calibration device of this example is determined, that is, when temperature calibration data is acquired, the temperature sensing section 511 of the first temperature sensor 510 at least partially passes through the sensor through hole 212 and is located below the sensor through hole 212, and the limit section 512 of the first temperature sensor 510 is located above the sensor through hole 213 and is in pressure contact with the upper surface of the micro switch 213.

Further, in order to improve the foregoing examples, particularly the second and third examples, as shown in fig. 3, a weight 513 is disposed at an upper portion of the first temperature sensor 510, generally, the weight 513 is located above the sensor fixing portion 211 without contacting the sensor fixing portion 211, and the weight 513 is fixed to the (movable, detachable) first temperature sensor 510, thereby increasing the downward force applied to the first temperature sensor 510.

The foregoing examples, and particularly example two and example three, are improved to better ensure the stability and accuracy of the movement of the first temperature sensor 510 in the vertical direction, as follows.

Fourth, as shown in fig. 5, the positioning bracket 100 includes a guide slot 110 (coinciding with the cantilever positioning portion 230 in the figure) disposed in the body of the positioning bracket 100 and extending up and down, and further includes a transmission rod movable in the guide slot 110, the bottom of the transmission rod is fixed to the cantilever positioning portion 230, and the upper end of the transmission rod passes through the positioning bracket 100 and is drivingly connected to the driving motor 300; driven by the driving motor 300, the driving rod can move up and down, part of the cantilever positioning part 230 is embedded in the guide groove 110 and limited by the guide groove 110, and the cantilever positioning part 230 cannot move horizontally, so that when the driving rod 120 drives the cantilever positioning part 230 to move, the cantilever positioning part 230 can move up and down only while being limited by the guide groove 110;

other structures including the first cantilever 210, the second cantilever 220, the sensor fixing portion 211, the sensor through hole 212, the micro switch 213, and the like are the same as those of the second example and the third example, and are not described again; the connection relationship between the controller 400 and the driving motor 300 and the microswitch 213 is the same as that in the second and third examples, and is not described again; the temperature source device 550 and the first temperature sensor 510 are not shown in the figure because they are not essential structures of the temperature calibration apparatus.

Fifth example, the positioning bracket includes a guide groove disposed in the positioning bracket body and extending vertically, and the difference from the fourth example is that the cantilever positioning portion is completely embedded in the guide groove, positioning teeth are disposed at horizontally opposite ends of the cantilever positioning portion, two sets of transmission gears are disposed on two inner sides of the guide groove (two sides opposite to the two ends of the cantilever positioning portion having the positioning teeth), the driving motor drives the two sets of transmission gears to rotate (which can be driven by belts, gears, etc. in the prior art, and will not be described herein), the transmission gears and the positioning teeth are engaged with each other, when the left set of transmission gears rotates clockwise, the right set of transmission gears rotates counterclockwise and the linear velocities of the two sets of gears are the same, the cantilever positioning portion located between the two sets of transmission gears is driven by the gear set to move downward, when the left set of transmission gears rotates counterclockwise, the right set of transmission gears rotates clockwise and the linear velocities of the two sets of gears are the same, the cantilever positioning part is driven by the gear set to move upwards.

Similar to the fourth and fifth examples, there may be other implementation schemes, a positioning mechanism extending vertically is disposed in the positioning bracket 100, and the cantilever positioning portion 230 is at least partially connected to the positioning mechanism, so that the positioning mechanism limits the movement of the cantilever positioning portion 230, the driving motor 300 drives the cantilever positioning portion 230 to move along the guiding mechanism, and unnecessary movements such as horizontal movement and rotation of the cantilever positioning portion 230 are avoided.

Detailed description of the utility model

As shown in figures 6 and 7, the temperature calibration device is mainly used for calibrating the temperature zone of a dry body furnace, and comprises a device base 410, wherein the bottom surface of the device base 410 is provided with rollers for assisting the movement of the whole temperature calibration device, the upper end surface of the device base 410 is provided with a positioning support 100, the upper end surface of the device base 410 is provided with a temperature source arrangement area at one side of the positioning support 100, the temperature source arrangement area is used for placing one or more dry body furnaces to be calibrated, and the height of the device base 410 in the temperature source arrangement area (including the rollers if any) is 60cm-120 cm.

The power distribution assembly 420 is arranged inside the device base 410, the power distribution assembly 420 is electrically connected with an external power supply through an external power supply interface 421 arranged on the surface of the device base 410, the power distribution assembly 420 is electrically connected with the controller 400 and supplies power to the controller 400, the power distribution assembly 420 is electrically connected with the driving motor 300 and supplies power to the driving motor 300, the power distribution assembly 420 is further provided with a power supply interface 422 on the surface of the device base 410 and is electrically connected with the calibrated dry body furnace 550 through the power supply interface 422, and therefore power is supplied to the calibrated dry body furnace 550; the controller 400 is electrically connected to the driving motor 300, thereby controlling the operation of the driving motor 300.

Similar to the embodiment, the temperature calibration apparatus further includes a cantilever assembly, the cantilever assembly includes a first cantilever 210, a second cantilever 220 and a cantilever positioning portion 230, the first cantilever 210, the second cantilever 220 and the cantilever positioning portion 230 are all horizontally arranged, one end of the first cantilever 210 is hinged to one end of the second cantilever 220, so that the first cantilever 210 can horizontally rotate relative to the second cantilever 220, the other end of the second cantilever 220 is hinged to the cantilever positioning portion 230, so that the second cantilever 220 can horizontally rotate relative to the cantilever positioning portion 230, the cantilever positioning portion 230 is movably connected to the positioning bracket 100, and the driving motor 300 can drive the cantilever positioning portion 230 to vertically move along the positioning bracket 100.

In this embodiment, one end of the first cantilever 210 is hinged to the second cantilever 220, the other end of the first cantilever 210 is provided with a sensor fixing portion 211, a sensor through hole 212 penetrating up and down is formed in the sensor positioning portion 211, a micro switch 213 is further arranged on the sensor positioning portion 211, a switch trigger portion of the micro switch 213 is located near the upper end face of the sensor through hole 212, the micro switch 213 generates a signal when the switch trigger portion is pressed, the micro switch 213 is electrically connected to the controller 400, and the controller 400 controls the driving motor 300 according to the signal when the micro switch 213 generates the signal.

For temperature metering of the calibrated dry body oven 550, two standard temperature sensors were used.

The first standard temperature sensor 510, which may also be referred to as a first temperature sensor 510, includes a temperature sensing section 511 and a limiting section 512, the temperature sensing section 511 of the first standard temperature sensor 510 is located at one end thereof, the limiting section 512 of the first standard temperature sensor 510 is located at the middle thereof and near the other end thereof, the temperature sensing section 511 of the first standard temperature sensor 510 passes through the sensor through hole 212 and is influenced by gravity, the first standard temperature sensor 510 is inserted into the sensor through hole 212 until the limiting section 512 contacts with the upper end surface of the sensor positioning portion 211, and the outer diameter of the limiting section 512 of the first standard temperature sensor 510 is large enough, so that the limiting section 512 of the first standard temperature sensor 510 is pressed on the switch trigger portion of the micro switch 213; under the influence of gravity without other external force, the first reference temperature sensor 510 is fixed on the sensor fixing portion 211.

The second reference temperature sensor 520, which may also be referred to as a second temperature sensor 520, includes a temperature sensing section 521, and the temperature sensing section 521 of the second reference temperature sensor 520 is located at one end thereof.

In this example, since the calibration is performed in a state where the dry body furnace 550 is loaded, the dry body furnace 550 is provided with the soaking block 553, and the soaking block 553 is provided with the first temperature measuring blind hole 551 and the second temperature measuring blind hole 552.

The second standard temperature sensor 520 is inserted into the second blind temperature measuring hole 552, and the temperature sensing section 521 of the second standard temperature sensor 520 is in contact with the bottom of the second blind temperature measuring hole 552, at this time, the temperature measured by the second standard temperature sensor 520 is the bottom temperature of the calibrated dry body furnace.

The cantilever assembly is horizontally rotated to align the lower end of the first reference temperature sensor 510 with the first blind temperature measuring hole 551 (the projections of the two on the horizontal plane coincide).

The calibration operation is started, and the temperature of the calibrated dry body furnace 550 is controlled to rise until the temperature reaches and stabilizes at the calibration temperature point.

The controller 400 controls the driving motor 300, the driving motor 300 drives the cantilever positioning portion 230 to move downwards, and the cantilever positioning portion 230 drives the sensor fixing portion 211 to move downwards because the second cantilever 220 and the cantilever positioning portion 230 are substantially rigid in the vertical direction and the first cantilever 210 and the second cantilever 220 are substantially rigid in the vertical direction; for the first reference temperature sensor 510, it receives downward gravity and upward supporting force (the supporting force comes from the position contacting with the sensor fixing portion 211) in the vertical direction, therefore, after the sensor fixing portion 211 moves downward, the first reference temperature sensor 510 also moves downward under the influence of gravity, in this process, the limit section 512 of the first reference temperature sensor 510 is continuously pressed on the micro switch 213.

When the first reference temperature sensor 510 is in contact with the bottom of the first temperature measuring blind hole 551, the first reference temperature sensor 510 is subjected to downward gravity, upward supporting force (the supporting force is derived from the position in contact with the sensor fixing portion 211 and the position in contact with the first temperature measuring blind hole 551) in the vertical direction, and the relative position is also the insertion position desired to be determined;

because the micro switch 213 is still in the pressed state, the controller 400 controls the driving motor 300 to continue to drive the cantilever positioning portion 230 to move downwards, and at the next moment, because of the existence of the supporting force at the contact position with the bottom of the first temperature measuring blind hole 551, the first standard temperature sensor 510 does not move downwards any more, so that the first standard temperature sensor 510 is separated from the sensor fixing portion 211, the micro switch 213 is not pressed, and the signal of the micro switch 213 changes (including no signal generation or signal generation different from the pressed state);

the controller 400 controls the driving motor 300 to work reversely to drive the cantilever positioning portion 230 to move upward, the sensor fixing portion 211 moves upward, until the first standard temperature sensor 510 contacts with the upper end surface of the sensor fixing portion 211 (i.e. the desired determined insertion position), the micro switch 213 is pressed, the signal of the micro switch 213 is transmitted to the controller 400, and the controller 400 controls the driving motor 300 to stop driving, so as to stabilize the cantilever positioning portion 230 at the current position.

When the bottom temperature of the dry body furnace needs to be measured, the first standard temperature sensor 510 and the second standard temperature sensor 520 keep the current positions (mainly, the first standard temperature sensor 510 keeps the current position unchanged, and the position can be set as the first position for convenience of expression), the measured objects of the first standard temperature sensor 510 and the second standard temperature sensor 520 are the bottom temperature of the dry body furnace, and one or the weighted average of the two standard temperature sensors (510,520) can be selected as the measured value of the bottom temperature of the dry body furnace according to the positions of the first temperature measuring blind hole 551 and the second temperature measuring blind hole 552, the measurement accuracy of the first standard temperature sensor 510 and the second standard temperature sensor 520, and other parameters.

When the temperature gradient needs to be measured, the second standard temperature sensor 520 keeps the current position unchanged, the first standard temperature sensor 510 moves a designated distance from the first position, specifically, the controller 400 controls the driving motor 300 to move the cantilever positioning portion 230 upward by a designated distance H (for example, 10cm), correspondingly, the sensor fixing portion 211 also drives the first standard temperature sensor 510 to move upward by the designated distance H, the temperature sensing section 511 of the first standard temperature sensor 510 reaches the second position which is at the distance H from the bottom of the first temperature measuring blind hole 551, and the measured temperature indication value T obtained from the first standard temperature sensor 510 is obtained₁The measured temperature indication T is obtained from the second reference temperature sensor 520₂Then, the temperature gradient index of the dry body furnace is obtained as follows:

detailed description of the preferred embodiment

As shown in fig. 8 and 9, a temperature calibration apparatus, which is mainly used for calibrating a temperature sensor, includes a positioning bracket 100, a cantilever assembly, a driving motor 300, a controller 400, a standard temperature source device 550, and a second temperature sensor 520 as a standard.

The positioning bracket 100 is vertically fixed.

The cantilever assembly includes a first cantilever 210, a second cantilever 220 and a cantilever positioning part 230; the cantilever positioning part 230 is vertically movably disposed on the positioning bracket 100, the cantilever positioning part 230 is in transmission connection with the driving motor 300 and is driven by the driving motor 300, and the cantilever positioning part 230 can vertically move up and down along the positioning bracket 100; the cantilever positioning portion 230 is horizontally disposed, one end of which is hinged to one end of the second cantilever 230, and the direction of the hinged rotation axis is vertical to the top, so that the second cantilever 220 can horizontally rotate relative to the cantilever positioning portion 230, the other end of the second cantilever 230 is hinged to one end of the first cantilever 210, and the direction of the hinged rotation axis is vertical to the top, so that the first cantilever 210 can horizontally rotate relative to the second cantilever 220, and the other end of the first cantilever 210 is fixedly provided with the sensor fixing portion 211.

Referring to fig. 10, the sensor fixing portion 211 includes a plurality of through holes passing through vertically, and from a top view, the sensor fixing portion 211 includes a larger etalon through hole 214 located in the middle and a plurality of sensor through holes 212 located around the etalon through hole 214, wherein the aperture of the etalon through hole 214 is relatively larger, so that the second temperature sensor 520 can pass through smoothly without affecting each other, the sensor through hole 212 is used to arrange one or more calibrated temperature sensors (i.e. the first temperature sensor 510) at the same time, the aperture of the sensor through hole 212 is smaller, when the first temperature sensor 510 is disposed through the sensor through hole 212, the temperature sensing section 511 of the first temperature sensor 510 can pass through and be located below the sensor through hole 212, and the limiting section 512 of the first temperature sensor 510 cannot pass through the sensor through hole 212.

A micro switch 213 is arranged near the upper end face of each sensor through hole 212, the distance between each micro switch 213 and the corresponding sensor through hole 212 is close enough, so that the limiting section 512 of the first temperature sensor 510 penetrating through the sensor through hole 212 can be at least partially pressed on the corresponding micro switch 213, and the distance between each micro switch 213 and the other sensor through holes 212 is far enough, so that the limiting section 512 of the first temperature sensor 510 penetrating through one sensor through hole 212 cannot be pressed on the micro switch 213 corresponding to the other sensor through hole 212; this embodiment is realized in such a manner that the micro switch 213 and the upper opening of the sensor through hole 212 are located immediately adjacent to and at the outer edge of the sensor fixing portion 211.

Each of the micro switches 213 is electrically connected to the controller 400, and the controller 400 is electrically connected to the driving motor 300, so that the controller 400 can control the driving motor 300 to operate.

During calibration, the second temperature sensor 520 serving as a standard is fixedly arranged in the middle of the temperature zone of the standard temperature source device 550, the plurality of calibrated first temperature sensors 510 are respectively arranged in the sensor through holes 212 in a penetrating manner and are influenced by gravity, the limit sections 512 of the first temperature sensors 510 are pressed on the micro switch 213, and the micro switch 213 generates signals and transmits the signals to the controller 400.

The controller 400 controls the driving motor 300, the driving motor 30 drives the cantilever positioning portion 230 to move downwards through the transmission connection, and the cantilever positioning portion 230 drives the sensor fixing portion 211 to move downwards.

In the process of movement, due to reasons such as high temperature, small chamber area, and small-range collision, if the edge of the temperature zone chamber of a certain first temperature sensor 510 and the standard temperature source device 550 is adhered to each other and cannot be lowered continuously as expected, the micro switch 213 corresponding to the sensor through hole 212 formed through the first temperature sensor 510 is not pressed, the signal of the micro switch 213 changes, the controller 400 captures the change, stops the continuous lowering of the driving motor 300, and prompts the user.

If the temperature sensor group moves normally, the first temperature sensors 510 reach the desired position (touch down), the sensor fixing portion 211 moves down continuously, and the micro switches 213 are not pressed, and then the controller 400 controls the driving motor 300 to drive the sensor fixing portion 211 to move up in the reverse direction until the micro switches 213 are pressed again and reach the desired position exactly, so as to keep the position stable, and perform calibration and measurement on the group of the first temperature sensors 510.

After the calibration and measurement of the set of first temperature sensors 510 are completed, the controller 400 controls the driving motor 300 to drive the sensor fixing portion 211 to move upward until each first temperature sensor 510 is moved out of the standard temperature source device 550, the calibrated temperature sensors penetrating through each sensor through hole 212 are detached, a new set of first temperature sensors 510 is arranged, and the above process is repeated.

Preferably, a soaking block is arranged in the standard temperature source device 550, a plurality of blind holes are arranged on the soaking block, each blind hole is used for inserting the first temperature sensor 510, and when the standard temperature source device is calibrated, each first temperature sensor 510 is inserted into the blind hole and contacts with the bottom surface of the blind hole.

Detailed description of the utility model

As shown in fig. 11 and 12, a temperature calibration device for arranging a temperature sensor in a temperature field of a dry body furnace comprises a device base 410, wherein the height of the device base 410 is 60-120cm according to different models, a roller is arranged on the bottom surface of the device base 410 and used for assisting the device to move, a control console 430 is arranged on the right side of the upper end surface of the device base 410, and keys and indicator lamps are arranged on the control console 430.

The controller (not shown in the figure) is arranged in the console, the keys and the indicator lamps on the console 430 are respectively and electrically connected with the controller, the power distribution assembly is arranged in the device base 410, the output end of the power distribution assembly is respectively and electrically connected with the controller, the driving motor 300 and other power utilization components, and the input end of the power distribution assembly is electrically connected with an external power supply and used for supplying power to each power utilization component.

The positioning support 100 is fixedly arranged on the console 430, the two guide posts 120 are arranged on the positioning support 100, the cantilever positioning portion 230 is sleeved on the guide posts 120, the upper end portion of the positioning support 100 is provided with a driving motor 300, the driving motor 300 is in transmission connection with the cantilever positioning portion 230, the driving motor 300 can drive the cantilever positioning portion 230 to vertically move in the vertical direction, the driving motor 300 is electrically connected with the controller, the driving motor 300 can be controlled to work through the controller, and therefore the control of the vertical position of the cantilever positioning portion 230 is achieved.

One end of the cantilever positioning portion 230 extends horizontally and is provided with a second cantilever 220 and a first cantilever 210, wherein one end of the second cantilever 220 is hinged to one end of the cantilever positioning portion 230 through a second rotating shaft 242, and the other end of the second cantilever 220 is hinged to the first cantilever 210 through a first rotating shaft 241, so that the first cantilever 210 can move relative to the cantilever positioning portion 230 at any horizontal position within a certain range.

The first cantilever 210 is provided with a sensor through hole (not labeled in the figure because the first temperature sensor 510 is inserted), through which the first temperature sensor 510 can penetrate, the micro switch 213 is arranged near the sensor through hole, the trigger part of the micro switch 213 extends to the vicinity of the upper opening of the sensor through hole, when the first temperature sensor 510 penetrates through the sensor through hole, the limit section 512 of the first temperature sensor 510 can be pressed on the micro switch 213, and the micro switch 213 is electrically connected with the controller 400, so that the pressing state can be acquired by the controller 400.

As shown in fig. 11, the temperature source device 550 (dry body oven) is disposed at one side of the console 430 and on the apparatus base 410, and the temperature source device 550 and the positioning bracket 100 are not so far apart in a horizontal position, so that as shown in the figure, the first cantilever 210 and the second cantilever 220 are horizontally moved, the first temperature sensor 510 penetrating the sensor through hole can be positioned right above the temperature chamber of the temperature source device 550, and the other second temperature sensor 520, which does not need to be moved substantially, is fixed in the temperature chamber and juxtaposed to the first temperature sensor 510;

the upper portion of the first temperature sensor 510 is fitted with a weight 513.

During operation, if the controller has controlled the driving motor 300 to make the cantilever positioning portion 230 complete the designated displacement, it can be determined whether the temperature calibration can be normally performed according to the state of the micro switch 213, and if the micro switch 213 is in the pressed state, it indicates that the state is normal, and the temperature calibration or measurement can be performed, for example, the temperature indication value is read.

If the micro switch 213 is not pressed, the possible situations include:

1) when the designated displacement is too large, the cantilever positioning portion 230 moves down excessively, and one of the advantages of this embodiment is that, when the designated displacement is too large (exceeding the required displacement), the first temperature sensor 510 is in a movable fixed state, and therefore, cannot be forced to move down to cause damage;

2) the first temperature sensor 510 is bonded in the moving path due to high temperature or the like, and this problem can be detected in time and processed before the actual measurement.

Meanwhile, due to the combined design of the first cantilever 210, the second cantilever 220 and the cantilever positioning portion 230, in the process that the driving motor 300 controls the cantilever positioning portion 230 to move downwards to drive the first temperature sensor 510 to move downwards, if the first temperature sensor 510 is deformed, the position of the first temperature sensor in the horizontal direction is changed, the horizontal stress transmitted by the first temperature sensor 510 on the first cantilever 210 is transmitted to the second cantilever 220 and the cantilever positioning portion 230 through the hinge structure, so that the horizontal positions of the first cantilever 210 and the second cantilever 220 are automatically moved and the horizontal position deformation of the first temperature sensor 510 is compensated.

Claims (10)

1. A temperature calibration device comprises a positioning bracket, a cantilever assembly, a driving motor and a controller, wherein the positioning bracket is vertically arranged, the cantilever assembly is horizontally arranged, the controller is electrically connected with the driving motor and controls the driving motor,

the cantilever assembly comprises a first cantilever, a second cantilever and a cantilever positioning part;

the first cantilever is provided with a sensor fixing part for fixing a temperature sensor;

one end of the second cantilever is hinged with the first cantilever, so that the first cantilever can horizontally rotate relative to the second cantilever, and the other end of the second cantilever is hinged with the cantilever positioning part, so that the second cantilever can horizontally rotate relative to the cantilever positioning part;

the driving motor drives the cantilever positioning part to vertically move along the positioning support.

2. The temperature calibration device according to claim 1, wherein the sensor fixing portion includes a sensor through hole that passes vertically therethrough, and a micro switch that is provided in the vicinity of an upper end surface of the sensor through hole, the micro switch generating an electric signal when an upper surface thereof is pressed, the micro switch being electrically connected to the controller; the temperature sensor comprises a temperature sensing section and a limiting section, the temperature sensing section of the temperature sensor can be arranged in the sensor through hole in a penetrating mode, and the limiting section of the temperature sensor can be arranged in the microswitch in a pressing mode.

3. The temperature calibration device according to claim 2, wherein when acquiring the temperature calibration data, the temperature sensing section of the temperature sensor at least partially penetrates the sensor through hole and is located below the sensor through hole, and the limiting section of the temperature sensor is located above the sensor through hole and is in pressure contact with the upper surface of the microswitch.

4. The temperature calibration device according to claim 3, wherein the positioning bracket comprises a vertically extending guide mechanism, the cantilever positioning portion is at least partially connected with the guide mechanism, and a driving motor drives the cantilever positioning portion to move along the guide mechanism.

5. The temperature calibration device of claim 3, further comprising a weight disposed on the temperature sensor.

6. The temperature calibration device according to claim 3, further comprising a device base, wherein the positioning bracket is fixedly arranged on the device base, the device base is provided with a temperature source arrangement area on one side of the positioning bracket, and the height of the temperature source arrangement area is 60cm-120 cm.

7. The temperature calibration device of claim 6, wherein a power distribution assembly is disposed in the device base, the power distribution assembly is electrically connected to the controller, the driving motor and the temperature source device, and the controller is electrically connected to the temperature source device.

8. The temperature calibration device according to any one of claims 3 to 7, wherein the temperature calibration device is a calibration device for a dry body furnace temperature zone, the temperature sensor is a first standard temperature sensor, the temperature calibration device further comprises a second standard temperature sensor, a soaking block is arranged in the temperature zone of the calibrated dry body furnace, a first blind hole and a second blind hole are arranged on the soaking block, the second standard temperature sensor is inserted into the second blind hole and a temperature sensing section of the second standard temperature sensor is contacted with the bottom surface of the second blind hole during calibration, and the first standard temperature sensor is inserted into the first blind hole.

9. The temperature calibration device of claim 8, wherein the first reference temperature sensor comprises a first position in which the temperature sensing section of the first reference temperature sensor is in contact with the bottom surface of the first blind hole and a second position in which the temperature sensing section of the first reference temperature sensor is at a given distance from the bottom surface of the first blind hole during calibration.

10. The temperature calibration device according to any one of claims 3 to 7, wherein the temperature calibration device is a sensor calibration device, the temperature sensor is a calibrated temperature sensor and/or a standard temperature sensor, a temperature zone of the calibrated dry body furnace is provided with a soaking block, the soaking block is provided with a blind hole, and during calibration, the temperature sensor is inserted into the blind hole and is in contact with the bottom surface of the blind hole.

Images