CN111307697A - Freezing test system - Google Patents
Freezing test system Download PDFInfo
- Publication number
- CN111307697A CN111307697A CN201911186161.3A CN201911186161A CN111307697A CN 111307697 A CN111307697 A CN 111307697A CN 201911186161 A CN201911186161 A CN 201911186161A CN 111307697 A CN111307697 A CN 111307697A
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- temperature
- pressure
- resistance wire
- platinum
- humidity
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- 230000008014 freezing Effects 0.000 title claims abstract description 18
- 238000007710 freezing Methods 0.000 title claims abstract description 18
- 238000001514 detection method Methods 0.000 claims abstract description 23
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 124
- 229910052697 platinum Inorganic materials 0.000 claims description 62
- 238000004804 winding Methods 0.000 claims description 26
- 230000001681 protective effect Effects 0.000 claims description 25
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 238000005057 refrigeration Methods 0.000 claims description 3
- 230000003750 conditioning effect Effects 0.000 claims 2
- 238000003466 welding Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
Abstract
The invention relates to a freezing test system which comprises a temperature-pressure-humidity test box, a detection unit, a control unit, an adjusting unit and a vacuum pump, wherein the detection unit comprises a temperature sensor, a humidity sensor and an air pressure sensor; the adjusting unit comprises a refrigerator and a humidifier; the temperature, the air pressure and the humidity are detected by arranging the detection unit in the temperature-pressure-humidity test box, the detection information is fed back to the control unit, the control unit controls the adjusting unit in the temperature-pressure-humidity test box to control the temperature and the humidity, and the test box is externally connected with a vacuum pump to realize the adjustment of the air pressure in the temperature-pressure-humidity test box. The invention finally realizes the simultaneous operation and regulation of temperature, air pressure and humidity in the freezing test.
Description
Technical Field
The invention belongs to the technical field of freezing test equipment, and particularly relates to a freezing test system.
Background
The freezing test requires that the test equipment with temperature-pressure-humidity for the freezing test must meet certain test requirements, namely, under the condition of the pressure of a test chamber, the temperature of the equipment is stabilized at-20 ℃, the temperature is kept, and the pressure of the test chamber is reduced to a proper maximum working height for at least 10 min; and raising the temperature of the test chamber at a rate not exceeding 3 deg.C/min while raising and maintaining the relative humidity within the test chamber to not less than 95%. Maintaining this condition for a sufficient time to melt all frost and ice or to bring the equipment surface temperature to 0-5 ℃, the test chamber temperature must not exceed 30 ℃ for any time this step is performed; the test chamber pressure is raised to the indoor ambient pressure at a uniform rate over 15-30 min. After the pressure recovery is completed, the relative humidity of the test chamber is reduced to that of the normal indoor environment. During the whole test process, the test equipment needs to run the temperature-pressure-humidity function at the same time, and the surface temperature of the test piece is monitored during the test process. However, the existing test equipment cannot meet the requirement of simultaneous operation of temperature-pressure-humidity functions, and cannot monitor the surface temperature of a test piece in the test process.
Disclosure of Invention
The invention provides a freezing test system based on solving the defects of the prior art, and the freezing test system realizes the simultaneous control and operation of temperature, pressure and humidity by feeding back temperature, pressure and humidity information through a sensor and adjusting the temperature, pressure and humidity information by a control system.
The specific implementation content of the invention is as follows:
a freezing test system comprises a temperature-pressure-humidity test box, a detection unit, a control unit and an adjusting unit; the detection unit is connected with the temperature-pressure-humidity test chamber and is positioned in the temperature-pressure-humidity test chamber; the control unit is connected with the detection unit and receives the temperature, humidity and pressure information in the temperature-pressure-humidity test box detected by the detection unit; the adjusting unit is connected with the control unit, and the control unit controls the adjusting unit to control the temperature, the pressure and the humidity of the temperature-pressure-humidity test box.
In order to better implement the present invention, further, the detection unit includes a temperature sensor, a humidity sensor, a pressure sensor; six groups of temperature sensors are arranged and are respectively positioned on the left side and the right side of an upper region, a middle region and a lower region of the temperature-pressure-humidity test box; the humidity sensors are arranged in three groups and are respectively positioned at the top, the bottom and the center of the box body of the temperature-pressure-humidity test box; the pressure sensors are arranged in three groups and are respectively positioned at the top, the bottom and the center of the box body of the temperature-pressure-humidity test box.
In order to better realize the invention, further, the temperature sensor is a dual-redundancy platinum-heating resistance wire temperature sensor, the dual-redundancy platinum-heating resistance wire temperature sensor comprises a hollow protective shell, an electric connector is installed inside the protective shell, one end of the electric connector is connected with a dual-redundancy platinum-heating resistance wire winding extending to the outer side of one end of the protective shell, and a mounting sleeve is sleeved on the outer side of the dual-redundancy platinum-heating resistance wire winding; the other end of the electric connector is connected with a wiring end extending to the outer side of the other end of the protective shell, and epoxy resin is filled in the protective shell.
In order to better realize the invention, the dual-redundancy platinum-heat resistance wire winding comprises a framework group, a first platinum-heat resistance wire and a second platinum-heat resistance wire are wound on the framework group at equal intervals, and heat-conducting fins in contact with the first platinum-heat resistance wire and the second platinum-heat resistance wire are respectively arranged on two opposite sides of the framework group; one end of the framework group is provided with a lug plate connected with the first platinum resistance wire and the second platinum resistance wire, and the other end of the lug plate is connected with the electric connector.
In order to better realize the invention, the framework group comprises a first framework and a second framework which are arranged in parallel in an aligned mode and are insulated from each other, positioning hole groups for the first platinum resistance wire and the second platinum resistance wire to pass through are arranged at the head end of the first framework and the head end of the second framework, and wire inlet hole groups and wire outlet hole groups for the first platinum resistance wire and the second platinum resistance wire to pass through are arranged at the tail end of the first framework and the tail end of the second framework.
In order to better implement the invention, a stepped groove for installing the electric connector is further arranged inside the protective shell, an internal thread is arranged on the inner wall of the stepped groove, and a locking nut for locking and fixing the electric connector is screwed on the inner wall of the stepped groove.
In order to better implement the invention, the vacuum pump is further included and is connected with the temperature-pressure-humidity test chamber, and the air pressure temperature in the temperature-pressure-humidity test chamber is controlled.
In order to better implement the invention, further, the adjusting unit is positioned in the temperature-pressure-humidity test chamber and comprises a humidifier and a refrigerator which are respectively connected with the control unit, and the control unit controls the refrigeration of the refrigerator so as to achieve the temperature adjusting effect.
In order to better implement the invention, further, the humidifier and the refrigerator are provided with six groups which are respectively positioned at two sides of the upper, middle and lower layers of the temperature-pressure-humidity test box.
In order to better implement the invention, further, the control unit adopts PLC closed-loop control.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the simultaneous operation control of temperature, pressure and humidity is realized.
Drawings
FIG. 1 is a schematic diagram of the connection of the components of the freezing test system;
FIG. 2 is a schematic front view of the installation position of the temperature sensor in the temperature-pressure-humidity test chamber;
FIG. 3 is a schematic front view of the installation positions of the humidity sensor and the pressure sensor in the temperature-pressure-humidity test chamber;
FIG. 4 is an overall structure diagram of a dual-redundancy platinum resistance wire temperature sensor;
FIG. 5 is a schematic view of a front view structure of a dual-redundancy platinum resistance wire winding;
FIG. 6 is a schematic diagram of a top view structure of a dual-redundancy platinum resistance wire winding;
fig. 7 is a schematic diagram of winding resistance wires on the skeleton group.
Wherein: 1-a protective housing; 2-an electrical connector; 3-dual redundancy platinum resistance wire winding; 4-a terminal; 5, installing a pipe sleeve; 6-locking the nut; 31-skeleton group; 32-a thermally conductive sheet; 33-a lug; 01-a first platinum resistance wire; 02-a second platinum resistance wire; 001-first backbone; 002-second skeleton.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and therefore should not be considered as a limitation to the scope of protection. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
a freezing test system is shown in figure 1 and comprises a temperature-pressure-humidity test box, a detection unit, a control unit and an adjusting unit; the detection unit is connected with the temperature-pressure-humidity test chamber and is positioned in the temperature-pressure-humidity test chamber; the control unit is connected with the detection unit and receives the temperature, humidity and pressure information in the temperature-pressure-humidity test box detected by the detection unit; the adjusting unit is connected with the control unit, and the control unit controls the adjusting unit to control the temperature, the pressure and the humidity of the temperature-pressure-humidity test box.
The working principle is as follows: the temperature, the pressure and the humidity in the temperature-pressure-humidity test box are detected by the detection unit, and the temperature and the humidity in the temperature-pressure-humidity test box can be detected and adjusted and controlled by controlling the adjustment unit through the control unit.
Example 2:
the present invention is based on the above embodiment 1, and in order to better implement the present invention, as shown in fig. 2 and fig. 3, further, the detecting unit includes a temperature sensor, a humidity sensor, and a pressure sensor; six groups of temperature sensors are arranged and are respectively positioned on the left side and the right side of an upper region, a middle region and a lower region of the temperature-pressure-humidity test box; the humidity sensors are arranged in three groups and are respectively positioned at the top, the bottom and the center of the box body of the temperature-pressure-humidity test box; the pressure sensors are arranged in three groups and are respectively positioned at the top, the bottom and the center of the box body of the temperature-pressure-humidity test box.
The working principle is as follows: the six groups of temperature sensors are arranged, so that the temperature in the temperature-pressure-humidity test box can be monitored more accurately, if the test box is too large, the temperature of each part in the test box can have errors, and more accurate measurement results can be obtained by arranging a plurality of groups of sensors; similarly, the humidity sensor and the pressure sensor for measuring air pressure are respectively provided with three groups at the upper, middle and lower positions in the temperature-pressure-humidity test chamber, and the data of all positions in the temperature-pressure-humidity test chamber can be measured in a balanced manner, so that the measurement is more accurate, and the later-stage adjustment is more balanced and accurate.
Other parts of this embodiment are the same as embodiment 1, and thus are not described again.
Example 3:
on the basis of any one of the above embodiments 1-2, in order to better implement the present invention, as shown in fig. 4-7, the present invention further includes a hollow protective casing 1, an electrical connector 2 is installed inside the protective casing 1, one end of the electrical connector 2 is connected with a dual-redundancy platinum-based resistance wire winding 3 extending to the outer side of one end of the protective casing 1, and an installation sleeve 5 is sleeved outside the dual-redundancy platinum-based resistance wire winding 3; the other end of the electric connector 2 is connected with a wiring terminal 4 extending to the outer side of the other end of the protective shell 1, and the interior of the protective shell 1 is filled with epoxy resin.
The protective shell 1 is used for protecting an electric connector 2 and a dual-redundancy platinum-resistance wire winding 3 inside the protective shell, one end of the dual-redundancy platinum-resistance wire winding 3 is a measuring end, and the other end of the dual-redundancy platinum-resistance wire winding 3 is a connecting end. The dual-redundancy platinum-heat resistance wire winding 3 comprises two groups of mutually independent measuring loops formed by two mutually independent insulated platinum-heat resistance wires, when the two platinum-heat resistance wires are influenced by external environment temperature, the resistance value of the platinum-heat resistance wire is changed along with the temperature value, and the change condition of the environment temperature can be obtained by detecting the resistance value of the platinum-heat resistance wire in real time, so that the detection of the environment temperature is realized. When the detection loop formed by one platinum resistance wire fails, the detection loop formed by the other platinum resistance wire can still work normally, so that the working reliability of the dual-redundancy platinum resistance wire temperature sensor is effectively improved, and the redundancy of temperature detection is improved.
The measuring end of the dual-redundancy platinum-heat resistance wire winding 3 extends to the outer side of one end of the protective shell 1 and is used for detecting the temperature of the external environment, an installation sleeve 5 used for protecting the measuring end of the dual-redundancy platinum-heat resistance wire winding 3 is arranged outside the measuring end of the dual-redundancy platinum-heat resistance wire winding 3, and one end of the installation sleeve 5 is connected with one end of the protective shell 1 and is welded, installed and fixed; the connecting end of the dual-redundancy platinum resistance wire winding 3 is connected with one end of the electric connector 2 in a welding mode, the other end of the electric connector 2 is connected with an external measuring circuit through a wiring end 4 extending to the outside of the other end of the protective shell 1, and epoxy resin is filled in the protective shell 1 and used for fixing components inside the protective shell 1 and insulating the components.
The inside of protecting sheathing 1 is provided with the ladder groove that is used for installing electric connector 2, be provided with the internal thread on the inner wall in ladder groove and the spiral shell is equipped with lock nut 6 that is used for locking fixed electric connector 2.
Other parts of this embodiment are the same as any of embodiments 1-2 described above, and thus are not described again.
Example 4:
in this embodiment, on the basis of any one of the above embodiments 1 to 3, in order to better implement the present invention, further, as shown in fig. 5 to 7, the dual-redundancy platinum-based resistance wire winding 3 includes a skeleton group 31, a first platinum-based resistance wire 01 and a second platinum-based resistance wire 02 are wound around the skeleton group 31 at equal intervals, and heat-conducting fins 32 in contact with the first platinum-based resistance wire 01 and the second platinum-based resistance wire 02 are respectively disposed on two opposite sides of the skeleton group 31; one end of the framework group 31 is provided with a lug 33 connected with the first platinum resistance wire 01 and the second platinum resistance wire 02, and the other end of the lug 33 is connected with the electric connector 2.
The framework group 31 is a long flat-plate-shaped mica sheet group, one end of the framework group 31 is a connecting end and is connected with a lug 33 through welding, screwing and riveting, and the other end of the lug 33 is connected with an external measuring circuit through the electric connector 4. First platinum resistance wire 01 and second platinum resistance wire 02 are parallelly wound at equal intervals between the link and the locating end of skeleton group 31, and the both ends of first platinum resistance wire 01 and second platinum resistance wire 02 all are connected with lug 33 and constitute measurement circuit, still be provided with conducting strip 32 along the length direction of skeleton group 31 on the relative both sides of skeleton group 31, insulating contact constitutes dual redundancy platinum resistance wire winding 3 between one side of conducting strip 32 and first platinum resistance wire 01 and the second platinum resistance wire 02, then place dual redundancy platinum resistance wire winding 3 and fix the back in external casing, and draw external casing with the link of electric connector 4, then pour into epoxy in the casing, constitute dual redundancy platinum resistance wire temperature sensor promptly.
The temperature of external environment transmits to first platinum resistance wire 01 and second platinum resistance wire 02 through conducting strip 32 evenly fast, mutual insulation between first platinum resistance wire 01 and the second platinum resistance wire 02, and first platinum resistance wire 01 and second platinum resistance wire 02 constitute mutually independent mutually noninterfere's return circuit respectively, two sets of return circuits are each other for backup, when a set of return circuit broke down, another group return circuit still can normal work, and then improved whole dual-redundancy platinum resistance wire winding 3's operational reliability. And the first platinum resistance wire 01 loop and the second platinum resistance wire 02 loop sense temperature simultaneously, so that the measurement time constant can be reduced to within 1s, and the thermal contact area is greatly increased through the heat conducting sheet 32, so that the measurement sensitivity is greatly improved. Meanwhile, a double-channel real-time measurement loop formed by the first platinum-heat resistance wire 01 loop and the second platinum-heat resistance wire 02 loop can play a role in shunting, under the condition that the rated current is less than or equal to 0.5mA, the electric loss of the whole dual-redundancy platinum-heat resistance wire winding 3 is not more than 0.1mW, and the self-heating of the dual-redundancy platinum-heat resistance wire winding 3 is effectively weakened.
Other parts of this embodiment are the same as any of embodiments 1 to 3, and thus are not described again.
Example 5:
in this embodiment, on the basis of any one of the above embodiments 1 to 4, in order to better implement the present invention, further, as shown in fig. 5 to 7, the frame set 31 includes a first frame 001 and a second frame 002 that are arranged in parallel and aligned and insulated from each other, positioning hole sets through which the first platinum-heat resistance wire 01 and the second platinum-heat resistance wire 02 pass are respectively disposed at a head end of the first frame 001 and a head end of the second frame 002, and a wire inlet hole set and a wire outlet hole set through which the first platinum-heat resistance wire 01 and the second platinum-heat resistance wire 02 pass are respectively disposed at a tail end of the first frame 001 and a tail end of the second frame 002.
The first framework 001 and the second framework 002 both adopt long flat-plate mica sheets with the thickness of 0.3mm and the width of 5mm, and the lengths of the first framework 001 and the second framework 002 are correspondingly arranged according to the length of the platinum resistance wire required to be wound. The head end of first skeleton 001 and the head end of second skeleton 002 all are provided with the positioning hole group that supplies first platinum resistance wire 01 and second platinum resistance wire 02 to pass, the positioning hole group is including parallel arrangement's positioning hole A and positioning hole B, the end of first skeleton 001 and the end of second skeleton 002 all are provided with inlet wire punch combination and the outlet wire punch combination that supplies first platinum resistance wire 01 and second platinum resistance wire 02 to pass, the inlet wire punch combination includes inlet wire hole C and inlet wire hole D of parallel arrangement in the terminal one side of first skeleton 001 and second skeleton 002, the outlet wire punch combination includes outlet wire hole E and outlet wire hole F of parallel arrangement at the terminal opposite side of first skeleton 001 and second skeleton 002.
First, a first framework 001 is taken, one end of a first platinum-heat resistance wire 01 and one end of a second platinum-heat resistance wire 02 penetrate through a positioning hole A and a positioning hole B respectively, and then the other end of the first platinum-heat resistance wire 01 and the other end of the second platinum-heat resistance wire 02 penetrate through a wire outlet hole E and a wire outlet hole F respectively to serve as free ends. Then, after the second framework 002 is aligned in parallel with and coincides with the first framework 001, the first platinum-heat resistance wire 01 and the second platinum-heat resistance wire 02 are synchronously wound on the first framework 001 and the second framework 002 at equal intervals, and the end of the first platinum-heat resistance wire 01 and the end of the second platinum-heat resistance wire 02 penetrating through the positioning hole a and the positioning hole B respectively penetrate out of the wire inlet hole C and the wire inlet hole D and are connected with the connecting piece 33. And then the length of the platinum resistance wire penetrating out of the wire outlet hole E and the wire outlet hole F is adjusted, and the resistance is adjusted according to required errors and then is connected with the lug plate 33.
Further, the end of first skeleton 001 and the end of second skeleton 002 all are provided with the mounting hole group, the link of lug 33 corresponds the mounting hole group and is provided with the connecting hole, through connecting rivet connection between mounting hole group and the connecting hole.
The mounting hole group comprises a mounting hole G and a mounting hole H which are arranged on one side of the wire inlet hole C and the wire inlet hole D in parallel, a mounting hole M and a mounting hole K which are arranged on one side of the wire outlet hole E and the wire outlet hole F in parallel, the mounting hole G, the mounting hole H, the mounting hole M and the mounting hole K are respectively arranged on the lug plate 33 and are provided with connecting holes, connecting rivets are inserted in the mounting hole group and the connecting holes, and the mounting of the lug plate 33 at the tail end of the first framework 001 and the tail end of the second framework 002 is achieved. Then respectively welding the wire end of the first platinum-heat resistance wire 01 and the wire end of the second platinum-heat resistance wire 02 which respectively penetrate out of the wire inlet hole C and the wire inlet hole D to one end of the lug plate 33, respectively welding the wire end of the first platinum-heat resistance wire 01 and the wire end of the second platinum-heat resistance wire 02 which respectively penetrate out of the wire outlet hole E and the wire outlet hole F to the other end of the lug plate 33, respectively welding a joint of the lug plate 33 by using brass and a silver-plated joint to ensure welding reliability, and carrying out dispensing protection on a welding point after welding is completed.
The head end of first skeleton 001 and the head end of second skeleton 002 correspond and are provided with the hole of clamping, the one end of conducting strip 32 corresponds and clamps the hole and be provided with the fixed orifices, clamp through connecting rivet connection between hole and the fixed orifices.
One end of the heat conducting fin 32 close to the clamping hole is provided with a connecting lug parallel to the framework group 31, the connecting lug is provided with a fixing hole corresponding to the clamping hole, and the heat conducting fin 32 is installed on the side surface of the framework group 31 by inserting a connecting rivet between the clamping hole and the fixing hole. Meanwhile, the side face, which is parallel to the framework group 31, of the heat conducting sheet 32 on the side close to the framework group 31 is provided with a laminating panel, the heat conducting sheet 32 is pressed tightly through a connecting rivet, the laminating panel is tightly attached to the first platinum resistance wire 01 and the second platinum resistance wire 02, the heat exchange area is effectively increased, the heat exchange speed is higher, and the heat exchange is more uniform.
Other parts of this embodiment are the same as any of embodiments 1 to 4, and thus are not described again.
Example 6:
the present invention is further achieved in view of any one of the above embodiments 1 to 5, and further includes a vacuum pump connected to the temperature-pressure-humidity test chamber and controlling a temperature of an air pressure in the temperature-pressure-humidity test chamber.
The working principle is as follows: the vacuum pump can be used for pumping pressure to the temperature-pressure-humidity test box, controlling the pressure in the test box within a required range, and adjusting the pressure in the test box due to the change of temperature and humidity by the vacuum pump.
Other parts of this embodiment are the same as any of embodiments 1 to 5, and thus are not described again.
Example 7:
the present invention is based on any one of the above embodiments 1 to 6, and in order to better implement the present invention, further, the adjusting unit is located in the temperature-pressure-humidity test chamber, and includes a humidifier and a refrigerator respectively connected to the control unit, and the control unit controls the refrigeration of the refrigerator, so as to achieve the temperature adjusting function.
The working principle is as follows: the humidifier can be used for adjusting the humidity in the temperature-pressure-humidity test box, and similarly, the refrigerator is used for adjusting the temperature in the test box, and the adjustment of the freezing temperature is realized by adjusting the refrigerating power of the refrigerator, the power is different, and the refrigerating effect is also different.
Other parts of this embodiment are the same as any of embodiments 1 to 6, and thus are not described again.
Example 8:
the invention is based on the above embodiment 7, and in order to better implement the invention, further, the humidifier and the refrigerator are provided with six groups, which are respectively located at two sides of the upper, middle and lower layers of the temperature-pressure-humidity test box.
The working principle is as follows: the principle that the sensors are arranged in multiple groups at multiple positions in the test box is the same, the temperature and the humidity can be unbalanced under the condition that the test box is large, the humidifiers and the refrigerators are arranged on the left side and the right side of the upper layer, the middle layer and the lower layer of the temperature-pressure-humidity test box, accordingly, the temperature of each position of the test box can be controlled in a balanced mode, and the test control precision is high.
The other parts of this embodiment are the same as those of embodiments 1 to 7, and thus are not described again.
Example 9:
in order to better implement the present invention based on any one of the above embodiments 1 to 8, further, the control unit adopts PLC closed-loop control.
The other parts of this embodiment are the same as those of embodiments 1 to 8, and thus are not described again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. A freezing test system is characterized by comprising a temperature-pressure-humidity test box, a detection unit, a control unit and an adjusting unit; the detection unit is connected with the temperature-pressure-humidity test chamber and is positioned in the temperature-pressure-humidity test chamber; the control unit is connected with the detection unit and receives the temperature, humidity and pressure information in the temperature-pressure-humidity test box detected by the detection unit; the adjusting unit is connected with the control unit, and the control unit controls the adjusting unit to control the temperature, the pressure and the humidity of the temperature-pressure-humidity test box.
2. The ice testing system of claim 1, wherein the detection unit comprises a temperature sensor, a humidity sensor, a pressure sensor; six groups of temperature sensors are arranged and are respectively positioned on the left side and the right side of an upper region, a middle region and a lower region of the temperature-pressure-humidity test box; the humidity sensors are arranged in three groups and are respectively positioned at the top, the bottom and the center of the box body of the temperature-pressure-humidity test box; the pressure sensors are arranged in three groups and are respectively positioned at the top, the bottom and the center of the box body of the temperature-pressure-humidity test box.
3. The freezing test system according to claim 2, wherein the temperature sensor is a dual-redundancy platinum resistance wire temperature sensor, the dual-redundancy platinum resistance wire temperature sensor comprises a hollow protective shell (1), an electric connector (2) is installed inside the protective shell (1), one end of the electric connector (2) is connected with a dual-redundancy platinum resistance wire winding (3) extending to the outer side of one end of the protective shell (1), and a mounting sleeve (5) is sleeved on the outer side of the dual-redundancy platinum resistance wire winding (3); the other end of the electric connector (2) is connected with a wiring terminal (4) extending to the outer side of the other end of the protective shell (1), and epoxy resin is filled in the protective shell (1).
4. The freezing test system according to claim 3, wherein the dual-redundancy platinum resistance wire winding (3) comprises a framework group (31), a first platinum resistance wire (01) and a second platinum resistance wire (02) are wound on the framework group (31) at equal intervals, and heat conducting fins (32) in contact with the first platinum resistance wire (01) and the second platinum resistance wire (02) are respectively arranged on two opposite sides of the framework group (31); one end of the framework group (31) is provided with a lug plate (33) connected with the first platinum resistance wire (01) and the second platinum resistance wire (02), and the other end of the lug plate (33) is connected with the electric connector (2).
5. The freezing test system according to claim 4, wherein the framework group (31) comprises a first framework (001) and a second framework (002) which are arranged in parallel and aligned and insulated from each other, the head end of the first framework (001) and the head end of the second framework (002) are respectively provided with a positioning hole group for the first platinum-heat resistance wire (01) and the second platinum-heat resistance wire (02) to pass through, and the tail end of the first framework (001) and the tail end of the second framework (002) are respectively provided with a wire inlet hole group and a wire outlet hole group for the first platinum-heat resistance wire (01) and the second platinum-heat resistance wire (02) to pass through.
6. An ice testing system according to any one of the claims 3-5, characterized in that the protective casing (1) is provided with a stepped groove for mounting the electrical connector (2), the inner wall of the stepped groove is provided with an internal thread and is screwed with a locking nut (6) for locking and fixing the electrical connector (2).
7. The ice testing system of claim 1, further comprising a vacuum pump coupled to the temperature-pressure-humidity test chamber for controlling the atmospheric temperature within the temperature-pressure-humidity test chamber.
8. The ice testing system of claim 1, wherein the conditioning unit is located in the temperature-pressure-humidity test chamber and comprises a humidifier and a refrigerator respectively connected to the control unit, and the control unit controls the refrigeration of the refrigerator to achieve the temperature conditioning effect.
9. An ice testing system according to claim 8 wherein six sets of humidifiers and refrigerators are provided, one on each side of the upper, middle and lower layers of the temperature-pressure-humidity test chamber.
10. An ice testing system according to claim 1, wherein the control unit is closed loop controlled by a PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911186161.3A CN111307697A (en) | 2019-11-28 | 2019-11-28 | Freezing test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911186161.3A CN111307697A (en) | 2019-11-28 | 2019-11-28 | Freezing test system |
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| CN111307697A true CN111307697A (en) | 2020-06-19 |
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