CN218567316U - Hand-held type relative humidity calibrator based on saturated salt solution - Google Patents
Hand-held type relative humidity calibrator based on saturated salt solution Download PDFInfo
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- CN218567316U CN218567316U CN202222571742.2U CN202222571742U CN218567316U CN 218567316 U CN218567316 U CN 218567316U CN 202222571742 U CN202222571742 U CN 202222571742U CN 218567316 U CN218567316 U CN 218567316U
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Abstract
The utility model provides a hand-held type relative humidity calibrator based on saturated salt solution, include: the device comprises a salt tank, a machine body, a measurement and control circuit, a lithium battery pack, a test cabin assembly, a base and a sensor sealing and locking device, wherein the salt tank is a hollow cylindrical body, the bottom of the salt tank is sealed, and the outer side of the top of the salt tank is provided with an external thread; a first cabin and a second cabin which are hollow and mutually independent are arranged in the machine body, a step groove is formed in the inner side wall of the top of the first cabin, and the bottom of the second cabin is sealed; the lithium battery pack is connected with the measurement and control circuit; the test cabin assembly is a hollow columnar body, the bottom of the test cabin assembly is sealed, a through groove for gas diffusion is formed in the outer side surface of the middle part of the test cabin assembly, the liquid-proof and breathable film is attached to the outer side surface of the middle part of the test cabin assembly, a boss protruding in the middle is arranged at the top of the test cabin assembly, and external threads are formed in the outer side surface above the boss; the test cabin assembly is placed in the first cabin; the base is fixedly connected with the machine body; the sensor sealing and locking device is used for sealing and locking the relative humidity sensor. The calibration cost of the relative humidity can be reduced.
Description
Technical Field
The utility model relates to a sensor calibration technical field particularly, relates to a hand-held type relative humidity calibrator based on saturated salt solution.
Background
In the calibration of the relative humidity sensor and the relative humidity test instrument, the calibration device comprises but is not limited to a constant temperature and humidity box, a table-type temperature and humidity calibration instrument and a saturated salt principle-based calibration device. Among them, the calibration based on the saturated salt principle is the calibration of relative humidity which is widely applied, and since the saturated salt solution can form a certain amount of relative humidity in the sealed space, a saturated salt solution can provide a constant relative humidity at a constant temperature. However, since the relative humidity calibration device based on the saturated salt solution is related to the ambient temperature, the air pressure, and the like, especially, the influence of the temperature is obvious, and therefore, before the test is performed, the correction is required according to the current temperature. At present, the relative humidity calibration device based on saturated salt solution has large volume and high cost, and can not meet the outdoor movable relative humidity calibration requirement.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is directed to a handheld relative humidity calibrator based on saturated salt solution to reduce calibration costs of relative humidity.
In a first aspect, an embodiment of the present invention provides a hand-held relative humidity calibrator based on saturated salt solution, including: a salt tank, a machine body, a measurement and control circuit, a lithium battery pack, a test cabin assembly, a base and a sensor sealing and locking device, wherein,
the measurement and control circuit, the lithium battery pack and the test cabin assembly are arranged in the machine body, the salt tank is connected with the bottom of the machine body, the base is connected with the top of the machine body, and the sensor sealing and locking device is connected with the base;
the salt tank is a hollow cylindrical body, the bottom of the salt tank is sealed, and the outer side of the top of the salt tank is provided with an external thread;
a first cabin and a second cabin which are hollow and mutually independent are arranged in the machine body, an internal thread matched with an external thread arranged at the top of the salt tank is arranged at the bottom end of the first cabin, a stepped groove is arranged on the inner side wall of the top, and the bottom of the second cabin is sealed;
the measurement and control circuit comprises a temperature and humidity detection circuit;
the lithium battery pack is connected with the measurement and control circuit, and the measurement and control circuit and the lithium battery pack are placed and fixed in the second cabin;
the test cabin assembly is a hollow cylindrical body, the bottom of the test cabin assembly is sealed, a through groove is formed in the outer side surface of the middle of the test cabin assembly, the liquid-proof and breathable film is attached to the outer side surface of the middle of the test cabin assembly, a boss protruding in the middle is arranged at the top of the test cabin assembly, and external threads are formed in the outer side surface above the boss;
the test cabin assembly is placed in a first cabin, the boss is lapped on the stepped groove and seals the stepped groove, and the space of the first cabin below the stepped groove and the space of the salt tank form a saturated salt solution storage cabin;
the base is fixedly connected with the machine body, corresponds to the position of the machine body provided with the first cabin and is provided with a through hole with the size matched with that above the boss of the test cabin assembly;
and the sensor sealing and locking device is used for sealing and locking the relative humidity sensor, and the sensor sealing and locking device and the space in the hollow cylindrical body of the test chamber component form a sealed test chamber.
In combination with the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where: and the O-shaped sealing ring is sleeved on the external thread of the salt tank.
In combination with the first aspect, embodiments of the present invention provide a second possible implementation manner of the first aspect, where the sensor seal locking device includes: a boss fixing cover, an adjustable locking unit and an end cover, wherein,
the boss fixing cover comprises a first boss and a second boss, the size of the first boss is larger than that of the second boss, wherein,
the inner side surface of the first boss is provided with an internal thread matched with the external thread arranged on the outer side surface above the boss, the inner side surface of the second boss is provided with an internal thread, and the outer side surface of the second boss is provided with an external thread;
the adjustable locking unit is a hollow cylinder, is wide at the upper part and narrow at the lower part, is provided with open slots which are uniformly distributed and alternated at the upper part, and is provided with external threads which are matched with the internal threads arranged on the inner side surface of the second boss at the lower part;
the end cover is a hollow cylinder, and the inner side surface of the end cover is provided with an internal thread matched with the external thread arranged on the outer side surface of the second boss.
Combine the possible embodiment of second of first aspect, the embodiment of the utility model provides a possible embodiment of third of first aspect, wherein, after relative humidity transducer placed into the test chamber through end cover, adjustable locking unit, the fixed lid of boss, utilize the internal thread that the second boss medial surface was seted up, the external screw thread that the lower part of the adjustable locking unit of screw in was seted up for the alternate open slot in upper portion of adjustable locking unit tightens up gradually, until adjustable locking unit and relative humidity transducer in close contact with.
With reference to the second possible implementation manner of the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, wherein an upper dimension of the adjustable locking unit is smaller than a dimension of the second boss.
With reference to the first aspect and the first possible implementation manner of the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the fifth possible implementation manner further includes:
and the inner side of the sealing cover is provided with an internal thread matched with the external thread arranged on the outer side surface above the boss, and the opening of the testing cabin assembly is screwed and sealed after the relative humidity sensor is removed from the testing cabin and the sensor sealing and locking device is removed.
With reference to the first aspect and any one of the first to third possible implementation manners of the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein the test chamber assembly includes: a cylindrical hollow stainless steel column support and a liquid-proof and gas-permeable membrane attached on the outer side surface of the stainless steel column support, wherein,
set up the ventilative logical groove that is used for of equipartition on the lateral surface of stainless steel cylinder support, the bottom is sealed, and the top is provided with middle convex boss, and in the stainless steel cylinder support inserted the salt jar, formed the headspace with the bottom of salt jar, the lower part of boss and salt jar formed sealedly, and the external screw thread has been seted up to the lateral surface on the upper portion of boss.
In combination with the sixth possible implementation manner of the first aspect, the present invention provides a seventh possible implementation manner of the first aspect, wherein the stainless steel column bracket includes: a bracket base, a stainless steel body and a bracket top cover, wherein,
the bracket base is fixed with the bottom of the stainless steel body, and the stainless steel body is sealed;
the inner side of the stainless steel body forms a first hollow space, the outer side surface of the stainless steel body is provided with uniformly distributed through grooves, and the liquid-proof and breathable film is attached to the outer side surface of the stainless steel column body;
the inboard formation of support top cap with the same second hollow space of first hollow space internal diameter, bottom and salt jar sealing connection, the top with the ladder groove forms sealing connection.
In combination with the seventh possible implementation manner of the first aspect, an embodiment of the present invention provides an eighth possible implementation manner of the first aspect, wherein the bracket top cover includes: a bracket first boss, a bracket second boss and a bracket third boss which are integrally formed, wherein,
an annular groove is formed in the middle of the outer side of the first boss of the support, a silica gel sealing sleeve is arranged in the annular groove, and the first boss of the support is tightly inserted into the salt tank;
the size of the second boss of the bracket is the same as that of the salt tank;
the outer side surface of the third boss of the bracket is provided with an external thread.
With reference to the first aspect and any one of the first to third possible implementation manners of the first aspect, an embodiment of the present invention provides a ninth possible implementation manner of the first aspect, where the method further includes:
the fan is arranged in the testing cabin assembly and is a miniature axial flow forced stirring fan used for carrying out forced stirring and diffusion on gas which is diffused into the testing cabin through the liquid-separating breathable film and evaporated from a saturated salt solution storage area of the salt tank.
The embodiment of the utility model provides a hand-held type relative humidity calibrator based on saturated salt solution, include: the device comprises a salt tank, a machine body, a measurement and control circuit, a lithium battery pack, a test cabin assembly, a base and a sensor sealing and locking device, wherein the measurement and control circuit, the lithium battery pack and the test cabin assembly are placed in the machine body, the salt tank is connected with the bottom of the machine body, the base is connected with the top of the machine body, and the sensor sealing and locking device is connected with the base; the salt tank is a hollow cylindrical body, the bottom of the salt tank is sealed, and the outer side of the top of the salt tank is provided with an external thread; a first cabin and a second cabin which are hollow and mutually independent are arranged in the machine body, internal threads matched with external threads arranged at the top of the salt tank are arranged at the bottom end of the first cabin, a stepped groove is arranged on the inner side wall of the top, and the bottom of the second cabin is sealed; the measurement and control circuit comprises a temperature and humidity detection circuit; the lithium battery pack is connected with the measurement and control circuit, and the measurement and control circuit and the lithium battery pack are placed and fixed in the second cabin; the test cabin assembly is a hollow columnar body, the bottom of the test cabin assembly is sealed, a through groove is formed in the outer side surface of the middle part of the test cabin assembly, the liquid-proof and breathable film is attached to the outer side surface of the middle part of the test cabin assembly, a boss protruding in the middle is arranged at the top of the test cabin assembly, and external threads are formed in the outer side surface above the boss; the test cabin assembly is placed in a first cabin, the boss is lapped on the stepped groove and seals the stepped groove, and the space of the first cabin below the stepped groove and the space of the salt tank form a saturated salt solution storage cabin; the base is fixedly connected with the machine body, corresponds to the position of the machine body provided with the first cabin and is provided with a through hole with the size matched with that above the boss of the test cabin assembly; and the sensor sealing and locking device is used for sealing and locking the relative humidity sensor, and the sensor sealing and locking device and the space in the hollow cylindrical body of the test chamber component form a sealed test chamber. Therefore, the structural design of multiple cavities is realized based on the stable humidity characteristic of the saturated salt solution, and the calibration cost of relative humidity can be reduced.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram illustrating a split structure of a handheld relative humidity calibrator based on a saturated salt solution according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a handheld relative humidity calibrator based on saturated salt solution according to an embodiment of the present invention;
fig. 3 is a schematic view of a machine body structure provided by an embodiment of the present invention;
fig. 4 shows a schematic structural diagram of a test chamber assembly provided by an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
Embodiments of the present invention provide a hand-held relative humidity calibrator based on saturated salt solutions, which is described below by way of example.
Fig. 1 is a schematic diagram illustrating a split structure of a handheld relative humidity calibrator based on a saturated salt solution according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a handheld relative humidity calibrator based on saturated salt solution according to an embodiment of the present invention;
fig. 3 is a schematic view of a machine body structure provided by an embodiment of the present invention;
fig. 4 shows a schematic structural diagram of a test chamber assembly provided by an embodiment of the present invention.
As shown in fig. 1 to 4, in the embodiment of the present invention, the handheld relative humidity calibrator includes: a salt tank 11, a machine body 12, a measurement and control circuit 13, a lithium battery pack 14, a test cabin assembly 15, a base 16 and a sensor sealing and locking device 17, wherein,
the measurement and control circuit 13, the lithium battery pack 14 and the test cabin assembly 15 are placed in the machine body 12, the salt tank 11 is connected with the bottom of the machine body 12, the base 16 is connected with the top of the machine body 12, and the sensor sealing and locking device 17 is connected with the base 16;
the salt tank 11 is a hollow cylindrical body, the bottom of the salt tank is sealed, and the outer side of the top of the salt tank is provided with an external thread;
a first chamber 121 and a second chamber 122 which are hollow and independent from each other are arranged in the machine body 12, an internal thread matched with an external thread arranged at the top of the salt tank is arranged at the bottom end of the first chamber 121, a stepped groove is arranged on the inner side wall of the top, and the bottom of the second chamber 122 is sealed;
the measurement and control circuit 13 comprises a temperature and humidity detection circuit;
the lithium battery pack 14 is connected with the measurement and control circuit 13, and the measurement and control circuit 13 and the lithium battery pack 14 are fixed in the second cabin 122;
the test cabin assembly 15 is a hollow cylindrical body, the bottom of the test cabin assembly is sealed, a through groove 1511 is formed in the outer side face of the middle of the test cabin assembly, the liquid-isolating and breathable film 152 is attached to the outer side face of the middle of the test cabin assembly, a boss 1512 protruding in the middle is arranged at the top of the test cabin assembly, and an external thread is formed in the outer side face above the boss 1512;
the test cabin assembly 15 is placed in the first cabin 121, the boss 1512 is lapped on and seals the stepped groove, and the space of the first cabin 121 below the stepped groove and the space of the salt tank 11 form a saturated salt solution storage cabin;
the base 16 is fixedly connected with the machine body 12, corresponds to the position of the machine body provided with the first cabin 121 and is provided with a through hole matched with the size above the lug boss of the test cabin assembly 15;
and the sensor sealing and locking device 17 is used for sealing and locking the relative humidity sensor, and the sensor sealing and locking device 17 and the space in the hollow cylindrical body of the test chamber component 15 form a sealed test chamber.
In the embodiment of the present invention, as an optional embodiment, the through hole is further formed at the predetermined distance from the bottom of the first chamber 121 upward, and the inner wall of the through hole is provided with an inner thread matched with the outer thread formed at the top of the salt tank. The top end of the first chamber 121 is further provided with a screw hole for positioning.
In the embodiment of the utility model provides an in, as an optional embodiment, measurement and control circuit 13 still includes display circuit 123, and display circuit 123 sets up on organism 12's lateral surface, and the humiture detection circuit is used for detecting the humiture in the test chamber of placing relative humidity sensor to show the humiture that will detect through display circuit 1511.
In the embodiment of the present invention, as an optional embodiment, the measurement and control circuit 13 and the lithium battery pack 14 are placed and fixed in the second chamber 122 through the top of the second chamber 122.
In the embodiment of the utility model, as an optional embodiment, the screw corresponding with the screw position that the top of organism 12 was seted up is still seted up on base 16's top, and base 16 and organism 12 utilize the screw to link firmly through the screw that this screw was seted up on top of organism 12.
In the embodiment of the present invention, as an optional embodiment, the relative humidity sensor is placed inside the hollow cylinder of the test chamber assembly, and the sensor sealing and locking device 17 is sealed and locked with the external thread fit provided on the outer side surface above the boss 1512.
In the embodiment of the utility model, as an optional embodiment, the external screw thread size that the salt tank top outside was seted up is: M35X1.5. The lithium battery pack supplies power and charges through a TYPE-C interface.
In the embodiment of the utility model provides an in, as an optional embodiment, sensor seal locking device includes: a boss fixing cover 171, an adjustable locking unit 172, and an end cover 173, wherein,
the boss fixing cover 171 includes a first boss and a second boss, the first boss having a size larger than that of the second boss, wherein,
the inner side surface of the first boss is provided with an internal thread matched with the external thread arranged on the outer side surface above the boss, the inner side surface of the second boss is provided with an internal thread, and the outer side surface of the second boss is provided with an external thread;
the adjustable locking unit 172 is a hollow cylinder, is wide at the upper part and narrow at the lower part, is provided with open slots uniformly distributed and alternated at the upper part, and is provided with external threads matched with the internal threads arranged on the inner side surface of the second boss at the lower part;
the end cap 173 is a hollow cylinder, and has an inner thread on the inner side thereof for engaging with the outer thread on the outer side of the second boss.
The embodiment of the utility model provides an in, pass through the end cover at relative humidity sensor, adjustable locking unit, the fixed lid of boss is placed into after the test chamber, utilize the internal thread that the second boss medial surface was seted up, the external screw thread that the lower part of the adjustable locking unit of screw in was seted up, make the alternate open slot in upper portion of adjustable locking unit tighten up gradually, thereby compress hollow space, until adjustable locking unit and relative humidity sensor in close contact with, form a scalable interface, thereby utilize the sealed locking device of sensor, can realize placing the relative humidity sensor of unidimensional (13-18 mm external diameter) in the test chamber, and realize relative humidity sensor's sealed locking, thereby can be applicable to various kinds of relative humidity sensor's calibration, and wide applicability.
In the embodiment of the present invention, as an optional embodiment, the upper dimension of the adjustable locking unit is smaller than the dimension of the second boss.
In the embodiment of the present invention, as an optional embodiment, further include:
the sealing cover 18 has an inner thread formed on the inner side thereof for engaging with the outer thread formed on the outer side of the upper portion of the boss 1512, and is screwed to seal the opening of the test chamber assembly 15 after the relative humidity sensor is removed from the test chamber and the sensor seal locking device is removed.
In the embodiment of the utility model, as an optional embodiment, still include O type sealing washer, cup joint on the external screw thread of salt jar, when the interior screw-thread fit who offers on with first cabin inside wall, seal the salt jar. Therefore, when the humidity calibrator is used, the humidity calibrator can be conveniently connected to each structural component of the humidity calibrator, and can also be used for sealing the humidity calibrator with the sealing cover when the humidity calibrator is not used.
In the embodiment of the utility model, as an optional embodiment, the test chamber subassembly includes: a stainless steel column support 151 which is cylindrical and hollow, and a liquid-proof and air-permeable film 152 which is attached on the outer side surface of the stainless steel column support 151, wherein,
set up the even trough 1511 that is used for ventilative that is equipped with on the lateral surface of stainless steel cylinder support 151, the bottom is sealed, and the top is provided with middle convex boss 1512, and in stainless steel cylinder support 151 inserted salt jar 11, form the headspace with the bottom of salt jar 11, the lower part of boss 1512 forms sealedly with salt jar 11, and the external screw thread has been seted up to the lateral surface on the upper portion of boss 1512.
In the embodiment of the present application, as an optional embodiment, the stainless steel column support includes: a bracket base, a stainless steel body and a bracket top cover, wherein,
the bracket base is fixed with the bottom of the stainless steel body, and the stainless steel body is sealed;
the inner side of the stainless steel body forms a first hollow space, the outer side surface of the stainless steel body is provided with uniformly distributed through grooves, and the liquid-proof and breathable film is attached to the outer side surface of the stainless steel column body;
the inboard formation of support top cap with the same second hollow space of first hollow space internal diameter, bottom and salt jar sealing connection, the top with the ladder groove forms sealing connection.
In the embodiment of the present application, as an optional embodiment, the bracket top cover includes: a bracket first boss, a bracket second boss and a bracket third boss which are integrally formed, wherein,
an annular groove is formed in the middle of the outer side of the first boss of the support, a silica gel sealing sleeve is arranged in the annular groove, and the first boss of the support is tightly inserted into the salt tank;
the size of the second boss of the bracket is the same as that of the salt tank;
the outer side surface of the third boss of the bracket is provided with an external thread.
In this application embodiment, the medial surface of first boss of support, support second boss, support third boss is interior smooth surface, and closely inserted includes but not limited to: transition fit and interference fit.
In an embodiment of the present invention, as an optional embodiment, the first chamber includes: a saturated salt solution storage tank and a test tank, wherein,
the saturated salt solution storage tank (salt tank) and the test tank are coaxially and reversely arranged.
The embodiment of the utility model provides an in, the salt tank cabin is used for placing the canned saturated salt solution, and the test chamber is used for placing the relative humidity sensor who is used for the calibration.
The embodiment of the utility model provides an in, as an optional embodiment, be provided with the salt tank of a plurality of different grade types, each salt tank corresponds the saturated salt solution of a humidity value to the mapping relation table of humiture and salt tank type is found. For example, in the mapping relation table, six different types of salt tanks are arranged, wherein the first salt tank type is a potassium acetate saturated salt solution, and the standard relative humidity value is 23.11 +/-0.25%; the second salt tank type is a saturated salt solution of magnesium chloride, and the standard relative humidity value is 33.07 +/-0.18%; the third salt tank type is a potassium carbonate saturated salt solution, and the standard relative humidity value is 43.16 +/-0.33%; the salt tank type four is sodium bromide saturated salt solution, and the standard relative humidity value is 59.14 +/-0.44%; the salt tank type five is a sodium chloride saturated salt solution, and the standard relative humidity value is 75.47 +/-0.14%; the salt tank type six is potassium chloride saturated salt solution, and the standard relative humidity value is 85.11 +/-0.29%. The above standard values are all values at 20 ℃, and the other standard values at temperature refer to relevant standard data, which are not described herein again. The utility model discloses the relative humidity sensor who is provided with precision less than or equal to 1.5% RH in the well test cabin, the power is opened to the calibrator, and afterwards, measurement and control circuit can automatic acquisition this relative humidity sensor's temperature and relative humidity value, realizes judging the salt tank type through following algorithm: and determining standard relative humidity values corresponding to various types of salt tanks at the temperature according to the acquired temperature, sequentially comparing the acquired humidity values with six standard relative humidity values corresponding to the temperature, and judging the type of the currently corresponding salt tank according to the standard relative humidity values when the absolute value of the difference between the value and a certain standard relative humidity value is less than or equal to 3%. For example, if the collected temperature is 20 ℃ and the collected relative humidity value is 23%, it can be determined that the type of salt tank inserted is a potassium acetate saturated salt solution.
The embodiment of the utility model provides an in, the external screw thread size of different salt jars is the same, like this, can realize that the salt jar of different humidity values is changed.
In the embodiment of the present invention, as another optional embodiment, further comprising:
the fan is arranged in the test cabin assembly and is a micro axial flow forced stirring fan used for carrying out forced stirring and diffusion on gas which is evaporated from a saturated salt solution storage area of the salt tank and diffused into the test cabin through the liquid-proof and breathable film.
The embodiment of the utility model provides an in, lithium cell group drive fan rotates, can realize opening and closing regularly of fan according to the setting of display circuit correspondence screen. As an optional embodiment, the fan is arranged at the indoor bottom of the test chamber, the side face of the test chamber is provided with a through groove for diffusion ventilation, and the through groove is communicated with the salt tank cabin through the overnight breathable film, so that the through groove is exchanged with gas in a salt tank filled with saturated salt solution to be fused, the rapid stability of the relative humidity and the temperature in the test chamber is realized, and the test error is reduced.
The embodiment of the utility model provides an in, utilize the fan, can be so that the gas of the saturated salt solution stock solution district evaporation from the salt jar, can be fast through separating liquid ventilated membrane diffusion to test cabin in to make the environment in the test cabin realize rapid stabilization, and reach relative humidity sensor's standard test environment's purpose.
In the embodiment of the utility model provides an in, as an optional embodiment, measurement and control circuit still is used for through the humiture in the real-time supervision test compartment, according to the humiture of monitoring, the mapping relation table of humiture and salt tank type that the inquiry set up in advance, discernment saturated salt solution stock solution district interior inserted salt tank type, and according to the current temperature of monitoring and the salt tank type of discernment, the temperature that the inquiry set up in advance, the table is calibrated to looking into of salt tank type and standard relative humidity, obtain the standard relative humidity that current temperature and salt tank type correspond, according to the standard relative humidity of inquiry and the relative humidity value under this temperature that relative humidity transducer markd, calibrate this relative humidity transducer, thereby realize fast, and stable, the accuracy provides the purpose of standard relative humidity, can be applied to high humidity like 98 RH or low humidity 11 RH's environment.
In the embodiment of the utility model provides an in, as an optional embodiment, after discerning the inserted salt jar type, show the salt jar type of discerning through the display circuit. As another alternative, after identifying the inserted salt tank type, if the current temperature exceeds the temperature range corresponding to the salt tank type, an alarm is triggered. The display circuit includes but is not limited to: liquid Crystal Displays (LCD), light Emitting Diodes (LED), and Organic Light Emitting Diodes (OLED). The embodiment of the utility model provides an in, display circuit can realize test interface and battery circuit interface and show in turn.
Table 1 is a calibration table illustration of standard relative humidity for a certain salt tank type.
TABLE 1
| ℃ | °F | ％RH |
| 10 | 50 | 86.77 |
| 15 | 59 | 85.92 |
| 20 | 68 | 85.11 |
| 25 | 77 | 84.34 |
| 30 | 86 | 83.62 |
| 35 | 95 | 82.95 |
The embodiment of the utility model provides an in, the measurement and control circuit realizes observing and controlling through little the control Unit (MCU, microcontroller Unit), as an optional embodiment, include: MCU, collection circuit and clock circuit, wherein,
the clock circuit includes: a battery, a first capacitor, a second capacitor, a clock chip, wherein,
the negative electrode of the battery is grounded, and the positive electrode of the battery is respectively connected with a battery pin (BBAT) of the clock chip and one end of the first capacitor;
one end of the second capacitor is connected with a power supply pin (VCC) of the clock chip;
the other end of the first capacitor and the other end of the second capacitor are grounded respectively;
the data pin (SDA) of the clock chip is connected with the PB7 pin (43 pin) of the MCU, the clock pin (SCL) is connected with the PB6 pin (42 pin) of the MCU, the reset pin (RST) is connected with the PB13 pin (26 pin) of the MCU, and the INT/SQW pin is connected with the PB12 pin (25 pin) of the MCU;
the acquisition circuit includes: a first resistor, a second resistor, and a flip-flop, wherein,
one end of the first resistor is respectively connected with one end of the second resistor and the first pin of the trigger;
the other end of the first resistor is respectively connected with a second pin of the trigger and a PB15 pin (28 pin) of the MCU;
the other end of the second resistor is respectively connected with a third pin of the trigger and a PB14 pin (27 pin) of the MCU;
the fourth pin of the flip-flop is grounded.
In the embodiment of the present invention, the specific structures of the MCU, the clock chip and the flip-flop can be referred to the related art documents.
The embodiment of the utility model provides an in, realize the structural design of multi-chamber based on the stable humidity characteristic of saturated salt solution, adopt the salt jar that the canning has saturated salt solution, miniature automatic acquisition's measurement and control circuit, specific structure and cavity, stir and spread through forced air, the saturated salt solution kind of real-time supervision male salt jar acquires corresponding standard relative humidity through looking up the table inquiry, realize the calibration to relative humidity sensor, thereby on the basis of guarantee relative humidity sensor's calibration function, the miniaturization of device has been realized.
The embodiment of the utility model provides an in, furtherly, to high humidity, low humidity scope, especially at ambient humidity with surveyed the humidity when poor great, because reasons such as leakproofness, vapor partial pressure lead to difficult standard value that reaches for the great situation of deviation utilizes miniature fan, spreads and the convection current, makes ambient humidity and surveyed the humidity and can reach the equilibrium in short time, and reach the standard value. Meanwhile, the adjustable locking structure is utilized, so that the device can adapt to relative humidity sensors with different outer diameters.
In the embodiments provided in the present application, it should be understood that the disclosed system and method may be implemented in other ways. The above-described system embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and there may be other divisions in actual implementation, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be through some communication interfaces, indirect coupling or communication connection of systems or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments provided in the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures, and moreover, the terms "first," "second," "third," etc. are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present application. Are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A hand-held relative humidity calibrator based on saturated salt solutions, comprising: a salt tank, a machine body, a measurement and control circuit, a lithium battery pack, a test cabin assembly, a base and a sensor sealing and locking device, wherein,
the measurement and control circuit, the lithium battery pack and the test cabin assembly are arranged in the machine body, the salt tank is connected with the bottom of the machine body, the base is connected with the top of the machine body, and the sensor sealing and locking device is connected with the base;
the salt tank is a hollow cylindrical body, the bottom of the salt tank is sealed, and the outer side of the top of the salt tank is provided with an external thread;
a first cabin and a second cabin which are hollow and mutually independent are arranged in the machine body, an internal thread matched with an external thread arranged at the top of the salt tank is arranged at the bottom end of the first cabin, a stepped groove is arranged on the inner side wall of the top, and the bottom of the second cabin is sealed;
the measurement and control circuit comprises a temperature and humidity detection circuit;
the lithium battery pack is connected with the measurement and control circuit, and the measurement and control circuit and the lithium battery pack are placed and fixed in the second cabin;
the test cabin assembly is a hollow cylindrical body, the bottom of the test cabin assembly is sealed, a through groove is formed in the outer side surface of the middle of the test cabin assembly, the liquid-proof and breathable film is attached to the outer side surface of the middle of the test cabin assembly, a boss protruding in the middle is arranged at the top of the test cabin assembly, and external threads are formed in the outer side surface above the boss;
the test cabin assembly is placed in a first cabin, the boss is lapped on the stepped groove and seals the stepped groove, and the space of the first cabin below the stepped groove and the space of the salt tank form a saturated salt solution storage cabin;
the base is fixedly connected with the machine body, corresponds to the position of the machine body provided with the first cabin and is provided with a through hole with the size matched with that above the boss of the test cabin assembly;
and the sensor sealing and locking device is used for sealing and locking the relative humidity sensor, and the sensor sealing and locking device and the space in the hollow cylindrical body of the test chamber component form a sealed test chamber.
2. The hand-held relative humidity calibrator according to claim 1, further comprising: and the O-shaped sealing ring is sleeved on the external thread of the salt tank.
3. The hand-held relative humidity calibrator of claim 1, wherein said sensor seal locking device comprises: a boss fixing cover, an adjustable locking unit and an end cover, wherein,
the boss fixing cover comprises a first boss and a second boss, the size of the first boss is larger than that of the second boss, wherein,
the inner side surface of the first boss is provided with an internal thread matched with the external thread arranged on the outer side surface above the boss, the inner side surface of the second boss is provided with an internal thread, and the outer side surface of the second boss is provided with an external thread;
the adjustable locking unit is a hollow cylinder, is wide at the upper part and narrow at the lower part, is provided with open slots which are uniformly distributed and alternated at the upper part, and is provided with external threads matched with the internal threads arranged on the inner side surface of the second boss at the lower part;
the end cover is a hollow cylinder, and the inner side surface of the end cover is provided with an internal thread matched with the external thread arranged on the outer side surface of the second boss.
4. The hand-held relative humidity calibrator according to claim 3, wherein after the relative humidity sensor is placed in the test chamber through the end cap, the adjustable locking unit, and the boss fixing cover, the internal threads formed on the inner side surface of the second boss are used to screw in the external threads formed on the lower portion of the adjustable locking unit, so that the open slots spaced at the upper portion of the adjustable locking unit are gradually tightened until the adjustable locking unit is in close contact with the relative humidity sensor.
5. The hand held relative humidity calibrator according to claim 3, wherein an upper dimension of said adjustable locking unit is smaller than a dimension of said second boss.
6. The hand-held relative humidity calibrator according to any one of claims 1 to 4, further comprising:
the inner side of the sealing cover is provided with an internal thread matched with the external thread arranged on the outer side surface above the boss, and the opening of the testing cabin assembly is screwed and sealed after the relative humidity sensor is removed from the testing cabin and the sensor sealing and locking device is removed.
7. The hand-held relative humidity calibrator according to any one of claims 1 to 4, wherein said test chamber assembly comprises: a cylindrical hollow stainless steel column bracket and a liquid-proof and gas-permeable membrane attached on the outer side surface of the stainless steel column bracket, wherein,
set up the logical groove that is used for ventilative of equipartition on the lateral surface of stainless steel cylinder support, the bottom is sealed, and the top is provided with middle convex boss, and in the stainless steel cylinder support inserted the salt jar, form the headspace with the bottom of salt jar, the lower part of boss and salt jar form sealedly, and the external screw thread has been seted up to the lateral surface on the upper portion of boss.
8. The hand-held relative humidity calibrator according to claim 7, wherein said stainless steel cylinder support comprises: a bracket base, a stainless steel body and a bracket top cover, wherein,
the bracket base is fixed with the bottom of the stainless steel body, and the stainless steel body is sealed;
the inner side of the stainless steel body forms a first hollow space, the outer side surface of the stainless steel body is provided with uniformly distributed through grooves, and the liquid-proof and breathable film is attached to the outer side surface of the stainless steel column body;
the inboard formation of support top cap with the same second hollow space of first hollow space internal diameter, bottom and salt jar sealing connection, the top with the ladder groove forms sealing connection.
9. The hand-held relative humidity calibrator according to claim 8, wherein said housing cap comprises: a bracket first boss, a bracket second boss and a bracket third boss which are integrally formed, wherein,
an annular groove is formed in the middle of the outer side of the first boss of the support, a silica gel sealing sleeve is arranged in the annular groove, and the first boss of the support is tightly inserted into the salt tank;
the size of the second boss of the bracket is the same as that of the salt tank;
the outer side surface of the third boss of the bracket is provided with an external thread.
10. The hand-held relative humidity calibrator according to any one of claims 1 to 4, further comprising:
the fan is arranged in the testing cabin assembly and is a miniature axial flow forced stirring fan used for carrying out forced stirring and diffusion on gas which is diffused into the testing cabin through the liquid-separating breathable film and evaporated from a saturated salt solution storage area of the salt tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222571742.2U CN218567316U (en) | 2022-09-28 | 2022-09-28 | Hand-held type relative humidity calibrator based on saturated salt solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222571742.2U CN218567316U (en) | 2022-09-28 | 2022-09-28 | Hand-held type relative humidity calibrator based on saturated salt solution |
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| CN218567316U true CN218567316U (en) | 2023-03-03 |
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| CN202222571742.2U Active CN218567316U (en) | 2022-09-28 | 2022-09-28 | Hand-held type relative humidity calibrator based on saturated salt solution |
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| Country | Link |
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| CN (1) | CN218567316U (en) |
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