CN217483573U - Humidity sensor testing device with controllable gas circuit and testing platform - Google Patents
Humidity sensor testing device with controllable gas circuit and testing platform Download PDFInfo
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- CN217483573U CN217483573U CN202221346991.5U CN202221346991U CN217483573U CN 217483573 U CN217483573 U CN 217483573U CN 202221346991 U CN202221346991 U CN 202221346991U CN 217483573 U CN217483573 U CN 217483573U
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Abstract
The utility model discloses a humidity sensor testing device with a controllable gas circuit and a testing platform, wherein the humidity sensor testing device with the controllable gas circuit is provided with an air source, a first flowmeter, a first electromagnetic valve group, an air inlet pipeline, a calibration solution bottle, an air outlet pipeline and a second electromagnetic valve group which are connected in sequence; the air outlet end of the second electromagnetic valve group is connected with a testing cavity; and a calibration electromagnetic valve and a second flowmeter are also arranged and connected with the air source, and the air outlet end of the second flowmeter is connected with the test cavity. The utility model discloses can control and then relative humidity in the quick switching cavity to solve current test method and have the problem that the test is slow, the test easily receives external disturbance, the test in the laboratory of being convenient for and industrial production.
Description
Technical Field
The utility model relates to an electronic instrument test equipment field especially relates to a controllable humidity transducer testing arrangement of gas circuit and test platform.
Background
In recent years, with the rapid development of intelligent technologies such as the internet of things and human-computer interaction, humidity is one of the most important environmental parameters, and production and physical health of people are influenced at any time. In agriculture, soil and atmospheric moisture and water have great influence on crop growth, the traditional saturated salt solution is used for controlling the air humidity value and carrying out sensor measurement, a device to be tested needs to be moved, and the test is influenced by inevitable contact with external air in the transfer process. In addition, the temperature and humidity environment box is adopted to test the slow rise and fall of the humidity, and the problem of nonuniform internal humidity is easy to occur when the box body is large. The foregoing is not conducive to testing the humidity sensor, and a humidity sensor testing platform with precisely controllable air paths needs to be developed to solve the above problems.
Disclosure of Invention
The utility model aims at designing a controllable humidity transducer testing arrangement of gas circuit and test platform, relative humidity in can the fast switch cavity to there is the problem that the test is slow, the test easily receives external disturbance, the test in the laboratory of being convenient for and industrial production in solving current test method.
The utility model discloses a following technical scheme realizes:
a humidity sensor testing device with a controllable gas circuit is provided with an air source, a first flowmeter, a first electromagnetic valve group, a gas inlet pipeline, a calibration solution bottle, a gas outlet pipeline and a second electromagnetic valve group which are sequentially connected; the air outlet end of the second electromagnetic valve group is connected with a testing cavity; and a calibration electromagnetic valve and a second flowmeter are also arranged and connected with the air source, and the air outlet end of the second flowmeter is connected with the test cavity.
Optionally, the first electromagnetic valve group is provided with a plurality of electromagnetic valves, and the number of the electromagnetic valves is at least the same as that of the air inlet pipelines.
Optionally, the first electromagnetic valve group is provided with a plurality of electromagnetic valves, and the number of the electromagnetic valves is one more than that of the air inlet pipelines.
Optionally, the second electromagnetic valve group is provided with a plurality of electromagnetic valves, and the number of the electromagnetic valves is at least the same as that of the air outlet pipelines.
Optionally, the air inlet pipeline, the calibration solution bottle and the air outlet pipeline form a test unit; the test unit is provided with a plurality of test units.
Optionally, there are 7 test units.
Optionally, the air outlet end of the second flowmeter is connected to the second electromagnetic valve group.
A humidity sensor test platform with a controllable gas circuit is provided with a humidity sensor test device with a controllable gas circuit and an electric control system for controlling the operation of the humidity sensor test device with the controllable gas circuit; the controllable humidity transducer testing arrangement of gas circuit be this disclosure arbitrary the controllable humidity transducer testing arrangement of gas circuit.
Optionally, the electronic control system includes a digital source meter, a single chip microcomputer and a PC; the digital source meter and the single chip microcomputer are connected with the PC through serial ports; during testing, the single chip microcomputer reads the humidity value of the temperature and humidity sensor for calibration in the testing cavity and uploads the humidity value to the PC through the serial port, and the sensor to be tested measures an electrical signal of the sensor to be tested through the digital source meter and uploads the electrical signal to the PC through the serial port.
Optionally, the single chip microcomputer is connected with the relay, and the circuit on-off of the electromagnetic valve on the direct-current power supply and the air path controllable humidity sensor testing device is controlled by controlling the suction of the relay.
The utility model has the advantages that:
the utility model discloses can control and then relative humidity in the quick switching cavity to solve current test method and have the problem that the test is slow, the test easily receives external disturbance, the test in the laboratory of being convenient for and industrial production.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention to its proper form. In the drawings:
FIG. 1 is a view of the overall structure of the humidity sensor testing platform of the present invention;
fig. 2 is a schematic structural view of an electric control system of the humidity sensor testing platform of the present invention;
FIG. 3 is a gas circuit frame diagram of the humidity sensor testing platform of the present invention;
FIG. 4 is an electric control schematic diagram of the humidity sensor testing platform of the present invention;
in the figures, the reference numerals denote:
the device comprises an air source 1, a first electromagnetic valve group 2, a first flowmeter 3, a calibration electromagnetic valve 4, a second flowmeter 5, a test cavity 6, a second electromagnetic valve group 7, an air outlet pipeline 8, a calibration solution bottle 9, an air inlet pipeline 10, a digital source meter 11, a single chip microcomputer 12 and a PC 13.
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 below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. 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.
In the description of the present invention, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
With reference to fig. 1, the humidity sensor testing device with controllable gas circuit of the present invention comprises an air source 1, a first flowmeter 3, a first solenoid valve set 2, a gas inlet pipeline 10, a calibration solution bottle 9, a gas outlet pipeline 8 and a second solenoid valve set 7 which are connected in sequence; the air outlet end of the second electromagnetic valve group 7 is connected with the testing cavity 6; the air source 1 is connected with a calibration electromagnetic valve 4 and a second flowmeter 5, the air outlet end of the second flowmeter 5 is connected with the test cavity 6, air blowing in the test cavity 6 can be directly achieved through the air path, and air drying in the test cavity 6 before testing is guaranteed. The air source 1 is a synthetic air source, the gas flow is controlled by the first flowmeter 3 and the second flowmeter 5, saturated salt solutions with different concentrations are contained in the calibration solution bottle 9, and each saturated salt solution is switched on and off by the first electromagnetic valve group 2 and the second electromagnetic valve group 7 controlled by the relay so as to control the on-off of the front-end and rear-end gas circuits. The dry air from the air source 1 firstly controls the air path to ventilate the specified saturated salt solution bottle by the first electromagnetic valve group 2, then controls the air to enter the test cavity 6 by the second electromagnetic valve group 7 so that the internal humidity is constant, the temperature and humidity in the test cavity 6 are calibrated by the temperature and humidity probe for calibration, and a device to be tested is tested by the digital source meter and a test result is given. The salt solution of each saturated salt is held by a gas washing bottle with a constant volume, and more than 30% of solid salt in the supersaturated salt solution is not dissolved in water. The gas path is divided into two paths, and the flow rate is controlled by a flowmeter respectively. The route 1 is dry air and an electromagnetic valve for controlling on-off, the route 2 is divided into seven paths through a flowmeter and passes through saturated salt solution, and the dry air and the wet air are rapidly switched through the on-off control of a front-end air inlet electromagnetic valve and a rear-end air outlet electromagnetic valve.
In the embodiment of the present disclosure, the first electromagnetic valve group 2 is provided with a plurality of electromagnetic valves, and the number of the electromagnetic valves is at least the same as the number of the air inlet pipelines 10, and the number of the electromagnetic valves on the first electromagnetic valve group 2 is to ensure that the opening and closing of each air inlet pipeline 10 can be controlled.
In the embodiment of the present disclosure, the first solenoid valve group 2 is provided with a plurality of solenoid valves, and the number of the solenoid valves is one more than that of the intake pipeline 10, and the extra solenoid valves, such as the first solenoid valve 8 shown in fig. 3, are not connected to other pipelines and are only used as pressure relief valves.
In the embodiment of the present disclosure, the second electromagnetic valve group 5 is provided with a plurality of electromagnetic valves, and the number of the electromagnetic valves is at least the same as the number of the air outlet pipelines 8, and the number of the electromagnetic valves on the second electromagnetic valve group 5 is ensured to control the opening and closing of each air outlet pipeline 8.
In the embodiment of the present disclosure, the air inlet pipeline 10, the calibration solution bottle 9 and the air outlet pipeline 8 form a testing unit; the test unit is multiple, namely each calibration solution bottle 9 is filled with a salt solution with a specific concentration, and the test unit is formed independently, so that the test is convenient and independent. And the calibration solution bottle 9 is arranged by adopting a gas washing bottle structure, namely, the gas inlet pipeline 10 is inserted below the liquid level of the calibration solution bottle 9, and the gas outlet pipeline 8 is positioned on the liquid level of the calibration solution bottle 9.
In an embodiment of the present disclosure, such as shown in fig. 1 and 3, there are 7 test cells, each corresponding to a different concentration of saturated salt solution in 7. Such as the first solenoid valves 1-7, the supersaturated salt solution 1-7 and the second solenoid valves 1-7 shown in fig. 3, form 7 separate test cells, respectively.
In the embodiment of the present disclosure, the air outlet end of the second flowmeter 5 is connected to the second electromagnetic valve group 7, such as shown in fig. 3, and the second flowmeter 5 may also be directly connected to additional electromagnetic valves in the second electromagnetic valve group 7, such as the second electromagnetic valve 8 in the figure, and indirectly communicate with the test chamber. The temperature and humidity sensor is used for testing that the volume in the cavity 6 is small so as to facilitate the rapid exchange of gas, and is placed in the cavity for calibration so as to accurately record the actual humidity value in the cavity. The humidity sensor to be tested is placed in the test cavity 6, and data are read by the digital source meter 11 through the high-precision temperature and humidity probe and the lead.
With reference to fig. 1-4, the humidity sensor testing platform with controllable gas circuit of the present invention is provided with a humidity sensor testing device with controllable gas circuit, and an electric control system for controlling the operation of the humidity sensor testing device with controllable gas circuit; the controllable humidity transducer testing arrangement of gas circuit is the controllable humidity transducer testing arrangement of this disclosure.
In the embodiment of the disclosure, the electric control system comprises a digital source meter 11, a singlechip 12 and a PC 13; the digital source meter 11 and the singlechip 12 are connected with a PC 13 through serial ports; during testing, the singlechip 12 reads the humidity value of the temperature and humidity sensor for calibration in the testing cavity 6 and uploads the humidity value to the PC 13 through the serial port, and the sensor to be tested measures an electrical signal of the sensor through the digital source meter 11 and uploads the electrical signal to the PC 13 through the serial port. The air source 1 supplies synthetic air with a humidity value of 0% RH, the synthetic air can be changed into synthetic air with determined relative humidity after passing through different saturated salt solutions, the PC 13 and the single chip microcomputer 12 control the operation of a system and read data, the electromagnetic valve group controls the on-off of an air path, the flow meter controls the air flow of the air path, a humidity sensor to be detected and a high-precision humidity sensor for calibrating and recording the humidity of a cavity are arranged in the test cavity 6, and the digital source 11 is used for measuring the humidity sensor and uploading the data to the PC 13.
In the embodiment of the present disclosure, the single chip 12 is connected to the relay, and the circuit on/off of the electromagnetic valve on the dc power supply and the humidity sensor testing device with controllable air circuit is controlled by controlling the actuation of the relay. The test platform is divided into a gas path part and a test control and data acquisition part. The gas circuit part comprises an air source 1, a first flowmeter 3, a first electromagnetic valve group 2, a gas inlet pipeline 10, a calibration solution bottle 9, a gas outlet pipeline 8, a second electromagnetic valve group 7 and a test cavity 6, a supersaturated salt solution and other components are marked as a gas circuit, namely the gas inlet pipeline 10, the calibration solution bottle 9 and the gas outlet pipeline 8 form a test unit. The test control and data acquisition part consists of a high-precision temperature and humidity probe (only available on the market) arranged in the test cavity 6, a digital source meter 11, a singlechip 12 and a PC 13. The whole platform is controlled by programming software in a PC 13 to run, and the digital source meter 11 and the singlechip 12 are connected with the PC 13 through serial ports. During testing, the singlechip 12 reads the humidity value of the temperature and humidity sensor for calibration of the test cavity 6 and uploads the humidity value to the PC 13 through the serial port, and the sensor to be tested measures an electrical signal of the sensor to be tested through the digital source meter 11 and uploads the electrical signal to the PC 13 through the serial port. The electromagnetic valve of the gas circuit part is controlled to be opened and closed by the single chip microcomputer 12, the single chip microcomputer 12 is connected with the relay, and the circuit of the direct current power supply and the electromagnetic valve is further controlled to be opened and closed by controlling the suction of the relay so that the electromagnetic valve is opened and closed to complete the gas circuit control. Specifically, the single chip microcomputer 12 used in the present embodiment is Arduino UNO R3. The program software control operation is carried out by adopting the existing interface of the Arduino UNO R3 singlechip, and the control can be completed by writing simple control instructions, wherein the control software can be written and changed as required by the technical personnel in the field, and the simple program is a simple change in the prior art.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The humidity sensor testing device with the controllable gas path is characterized by comprising an air source (1), a first flowmeter (3), a first electromagnetic valve group (2), a gas inlet pipeline (10), a calibration solution bottle (9), a gas outlet pipeline (8) and a second electromagnetic valve group (7) which are sequentially connected;
the air outlet end of the second electromagnetic valve group (7) is connected with the testing cavity (6);
and a calibration electromagnetic valve (4) and a second flowmeter (5) are also arranged and connected with the air source (1), and the air outlet end of the second flowmeter (5) is connected with the test cavity (6).
2. The air path controllable humidity sensor testing device according to claim 1, wherein a plurality of solenoid valves are provided in the first solenoid valve group (2), and the number of the solenoid valves is at least the same as that of the air inlet pipelines (10).
3. The air path controllable humidity sensor testing device according to claim 2, wherein a plurality of solenoid valves are provided in the first solenoid valve set (2), and the number of the solenoid valves is one more than that of the air inlet pipeline (10).
4. The testing device for the humidity sensor with the controllable air path according to claim 1, 2 or 3, wherein a plurality of electromagnetic valves are arranged in the second electromagnetic valve group (7), and the number of the electromagnetic valves is at least the same as that of the air outlet pipelines (8).
5. The gas path controllable humidity sensor testing device according to claim 1, 2 or 3, wherein the gas inlet pipeline (10), the calibration solution bottle (9) and the gas outlet pipeline (8) form a testing unit;
the test unit is provided with a plurality of test units.
6. The air path controllable humidity sensor testing device of claim 5, wherein there are 7 testing units.
7. The air path controllable humidity sensor testing device according to claim 1, 2 or 3, wherein an air outlet end of the second flowmeter (5) is connected with a second electromagnetic valve group (7).
8. A humidity sensor test platform with a controllable gas circuit is characterized in that a humidity sensor test device with a controllable gas circuit is arranged, and an electric control system is also arranged to control the humidity sensor test device with a controllable gas circuit to operate;
the testing device for the humidity sensor with the controllable air path is the testing device for the humidity sensor with the controllable air path as claimed in any one of claims 1 to 7.
9. The air path controllable humidity sensor test platform of claim 8, wherein the electronic control system comprises a digital source meter (11), a single chip microcomputer (12) and a PC (13); the digital source meter (11) and the singlechip (12) are connected with a PC (13) through a serial port;
during testing, the singlechip (12) reads the humidity value of the temperature and humidity sensor for calibration in the testing cavity (6) and uploads the humidity value to the PC (13) through the serial port, and the sensor to be tested measures an electrical signal of the sensor through the digital source meter (11) and uploads the electrical signal to the PC through the serial port.
10. The air path controllable humidity sensor testing platform according to claim 9, wherein the single chip microcomputer (12) is connected to a relay, and controls the on/off of the circuit of the DC power supply and the solenoid valve of the air path controllable humidity sensor testing device by controlling the attraction of the relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221346991.5U CN217483573U (en) | 2022-05-31 | 2022-05-31 | Humidity sensor testing device with controllable gas circuit and testing platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221346991.5U CN217483573U (en) | 2022-05-31 | 2022-05-31 | Humidity sensor testing device with controllable gas circuit and testing platform |
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| Publication Number | Publication Date |
|---|---|
| CN217483573U true CN217483573U (en) | 2022-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221346991.5U Active CN217483573U (en) | 2022-05-31 | 2022-05-31 | Humidity sensor testing device with controllable gas circuit and testing platform |
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| CN (1) | CN217483573U (en) |
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