CN109238495A - Temperature sensing circuit and temperature checking method - Google Patents
Temperature sensing circuit and temperature checking method Download PDFInfo
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- CN109238495A CN109238495A CN201811045361.2A CN201811045361A CN109238495A CN 109238495 A CN109238495 A CN 109238495A CN 201811045361 A CN201811045361 A CN 201811045361A CN 109238495 A CN109238495 A CN 109238495A
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- temperature
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- 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
- G01K7/20—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 in a specially-adapted circuit, e.g. bridge circuit
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Abstract
The invention discloses a kind of temperature sensing circuit and temperature checking methods.Wherein, which includes: temperature collection circuit, for being resistance value by the temperature transition of object to be measured, wherein temperature collection circuit includes temperature sensor, and temperature sensor is positive temperature coefficient sensor；Bleeder circuit is connect with temperature collection circuit, for determining the input voltage of processor according to resistance value；Processor is connect with bleeder circuit, for exporting the temperature of object to be measured according to input voltage.The present invention solves the narrow technical problem of temperature range that existing temperature sensing circuit detects.
Description
Technical field
The present invention relates to temperature detection fields, in particular to a kind of temperature sensing circuit and temperature checking method.
Background technique
Currently, temperature sensing circuit can be applied in various fields, for example, temperature sensing circuit is arranged in air-conditioning,
The wind speed that air-conditioning output can be made to be adapted with environment temperature；Temperature sensing circuit is arranged in water heater, can detect water heater
In water temperature whether reach preset temperature.
However, existing temperature sensing circuit temperature range that can be detected is narrow, generally -40 DEG C to 120 DEG C
In range, and higher or lower temperature can not be detected.In addition, the performance reliability of existing temperature sensing circuit also compares
Poor, detection accuracy is lower.
The narrow problem of the temperature range detected for above-mentioned existing temperature sensing circuit not yet proposes effective at present
Solution.
Summary of the invention
The embodiment of the invention provides a kind of temperature sensing circuit and temperature checking methods, at least to solve existing temperature
The narrow technical problem of the temperature range that detection circuit detects.
According to an aspect of an embodiment of the present invention, a kind of temperature sensing circuit is provided, comprising: temperature collection circuit,
For being resistance value by the temperature transition of object to be measured, wherein temperature collection circuit includes temperature sensor, and temperature sensor is
Positive temperature coefficient sensor；Bleeder circuit is connect with temperature collection circuit, for determining the input electricity of processor according to resistance value
Pressure；Processor is connect with bleeder circuit, for exporting the temperature of object to be measured according to input voltage.
Further, bleeder circuit includes: first resistor and second resistance, wherein is adopted with temperature one end of first resistor
Collector connection, the other end of first resistor are connect with second resistance, processor；First capacitor is connected in parallel with second resistance,
For filtering out the noise signal in input voltage.
Further, temperature sensing circuit further include: voltage regulator circuit, wherein the first end and temperature acquisition of voltage regulator circuit
Circuit connection, for providing constant voltage signal for temperature collection circuit.
Further, temperature collection circuit includes: temperature sensor, for acquiring the temperature of object to be measured；3rd resistor,
Wherein, the first end of one end of 3rd resistor and voltage regulator circuit, temperature sensor connection, the third end of the other end and voltage regulator circuit
Connection, for providing electric current for temperature sensor.
Further, positive temperature coefficient sensor is PT1000 sensor.
Further, temperature sensing circuit further include: current-limiting resistance, be connected to power supply and voltage regulator circuit second end it
Between, for limiting the electric current of input stabilizing circuit.
Further, temperature sensing circuit further include: compensation circuit is connect with the first end and second end of voltage regulator circuit,
For providing offset voltage and/or electric current for voltage regulator circuit.
Further, temperature sensing circuit further include: constant-current circuit, for controlling the electric current perseverance for flowing through temperature sensor
It is fixed, wherein the first end of constant-current circuit and the second end of voltage regulator circuit connect, the second end and first resistor of constant-current circuit, the
The connection of three resistance, the third end of constant-current circuit connects to power supply.
According to another aspect of an embodiment of the present invention, a kind of temperature checking method is additionally provided, comprising: acquire object to be measured
Temperature；It is resistance value by the temperature transition of object to be measured；Determine voltage value corresponding with resistance value；According to voltage value output to
Survey the temperature of object.
Further, the sensor for acquiring the temperature of object to be measured is positive temperature coefficient sensor, wherein positive temperature coefficient
Sensor is PT1000 sensor.
In embodiments of the present invention, by the way of positive temperature coefficient sensor temperature collection, pass through temperature collection circuit
It is resistance value by the temperature transition of object to be measured, the bleeder circuit connecting with temperature collection circuit determines processor according to resistance value
Input voltage, the processor connecting with bleeder circuit exports the temperature of object to be measured according to input voltage.Wherein, temperature acquisition
Circuit includes temperature sensor, and temperature sensor is positive temperature coefficient sensor.
It is easily noted that, acquires the temperature of object to be measured using positive temperature coefficient sensor in this application, and just
The temperature range that temperature coefficient sensor is able to detect that is greater than traditional temperature sensor temperature range detected, thus
Realize the technical effect for improving temperature sensing circuit temperature range detected.
It can be seen that scheme provided herein can solve the temperature range that existing temperature sensing circuit detects
Narrow technical problem.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is a kind of structural schematic diagram of temperature sensing circuit according to an embodiment of the present invention；And
Fig. 2 is a kind of flow chart of temperature checking method according to an embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
Embodiment 1
According to embodiments of the present invention, a kind of temperature sensing circuit embodiment is provided, wherein Fig. 1 shows temperature detection
The structural schematic diagram of circuit, as shown in Figure 1, temperature sensing circuit provided herein include: temperature collection circuit S1, partial pressure
Circuit S2 and processor U1.
Wherein, temperature collection circuit S1, for being resistance value by the temperature transition of object to be measured, wherein temperature acquisition electricity
Road includes temperature sensor, and temperature sensor is positive temperature coefficient sensor；Bleeder circuit S2, connect with temperature collection circuit,
For determining the input voltage of processor according to resistance value；Processor U1, connect with bleeder circuit, for defeated according to input voltage
The temperature of object to be measured out.
It should be noted that the type of object to be measured is different in different application scenarios, wherein object to be measured can be
But be not limited to air themperature, water temperature, solid temperature etc..Preferably, the temperature sensor in temperature collection circuit and object to be measured
It contacts or is closer, but the other elements distance in temperature sensor and temperature sensing circuit is farther out, so as to avoid temperature
Other elements fever in detection circuit causes the collected temperature of temperature sensor, and there are deviations, and then improve temperature detection
Precision.
The temperature coefficient sensor in addition, above-mentioned temperature sensor is positive, it is preferred that positive temperature coefficient sensor is PT1000
Sensor.Wherein, platinum resistance thermometer sensor, when PT1000 sensor, resistance value can change with the variation of temperature.Specifically, PT1000
It indicates at 0 DEG C, the resistance value of PT1000 is 1000 ohm, and resistance value is changed linearly with temperature.Optionally, according to PT1000 points
Degree table can inquire resistance value corresponding to PT1000 at different temperatures.
From the foregoing, it will be observed that by the way of positive temperature coefficient sensor temperature collection, it will be to be measured right by temperature collection circuit
The temperature transition of elephant is resistance value, and the bleeder circuit connecting with temperature collection circuit determines the input electricity of processor according to resistance value
Pressure, the processor connecting with bleeder circuit export the temperature of object to be measured according to input voltage.Wherein, temperature collection circuit includes
Temperature sensor, temperature sensor are positive temperature coefficient sensor.
It is easily noted that, acquires the temperature of object to be measured using positive temperature coefficient sensor in this application, and just
The temperature range that temperature coefficient sensor is able to detect that is greater than traditional temperature sensor temperature range detected, thus
Realize the technical effect for improving temperature sensing circuit temperature range detected.
It can be seen that scheme provided herein can solve the temperature range that existing temperature sensing circuit detects
Narrow technical problem.
In a kind of optional scheme, as shown in Figure 1, bleeder circuit S2 includes: first resistor R1, second resistance R2 and
One capacitor C1.Wherein, one end of first resistor is connect with temperature collection circuit, the other end and second resistance of first resistor, place
Manage device connection；First capacitor is connected in parallel with second resistance, for decoupling, to filter out the noise signal in input voltage.
In addition, as shown in Figure 1, the input voltage of processor is identical as the voltage at the both ends second resistance R2.Optionally, first
The resistance value of resistance and second resistance is equal, for example, being 3000 ohm, at this point, the input voltage of processor is bleeder circuit
Input voltage it is general.In addition, the noise signal that first capacitor C1 is filtered out is generally high frequency spurs signal.
In a kind of optional scheme, as shown in Figure 1, temperature sensing circuit further include: voltage regulator circuit U2, wherein pressure stabilizing
The first end of circuit is connect with temperature collection circuit, for providing constant voltage signal for temperature collection circuit.As shown in Figure 1, pressure stabilizing
Circuit can be zener diode, and corresponding model can be AZ431ANATRE1, which is corresponding with three ends, i.e.,
Three pins.Wherein, the output pin of voltage regulator circuit is 1 foot (i.e. the first end of voltage regulator circuit), and the reference voltage of output begins
It is eventually 2.5V.
Further, as shown in Figure 1, temperature collection circuit is connected between bleeder circuit and voltage regulator circuit, temperature acquisition
Circuit S1 includes: temperature sensor P3 and 3rd resistor R3.Wherein, temperature sensor, for acquiring the temperature of object to be measured；The
One end of three resistance and the first end (i.e. pin 1) of voltage regulator circuit, temperature sensor connect, the third of the other end and voltage regulator circuit
(i.e. pin 3) connection is held, for providing electric current for temperature sensor.Optionally, the resistance value of 3rd resistor R3 is 2400 ohm.
It should be noted that as shown in Figure 1, temperature sensor P3 connects with 3rd resistor R3, then pass through 3rd resistor R3
Electric current with by the electric current of temperature sensor P3 it is identical, wherein meet following formula by the electric current I of 3rd resistor R3:
In above formula, U is the voltage value of voltage regulator circuit U2 output.
This makes it possible to obtain the voltage U at the both ends temperature sensor P330Are as follows:
Again since the voltage of first resistor R1 and temperature sensor P3 tie point is temperature sensor P3 and 3rd resistor R3
The voltage at both ends, it is also identical as the voltage of first resistor R1 and the both ends second resistance R2, and temperature sensor P3 and 3rd resistor
The voltage U at the both ends R333Are as follows:
When first resistor R1 is identical as the resistance value of second resistance R2, the input voltage U of thus obtained processor U110
Meet following formula:
Processor U1 after obtaining input voltage, according to input voltage can temperature sensor P3 institute it is collected
Temperature value.Optionally, the table of comparisons of input voltage and temperature is stored in processor, for example, when temperature value is -50 DEG C, it is defeated
Entering voltage is 1.6676V；When temperature value is 200 DEG C, input voltage 2.1645V.
Specifically, according to the phasing meter of PT1000 it is found that it is 803.063 Ω that -50 DEG C of whens, which correspond to resistance value, at 200 DEG C pair
Answering resistance value is 1758.56 Ω.Therefore, when temperature is -50 DEG C, input voltage U10Are as follows:
When temperature is 200 DEG C, input voltage U10Are as follows:
It should be noted that in this application, the detectable temperature range of temperature sensor PT100 0 is -50 DEG C to 200
DEG C, it can be seen that, the temperature range more detected than the prior art of temperature range detected by the application is wide.
In addition, as shown in Figure 1, temperature sensing circuit further include: current-limiting resistance R4, compensation circuit C2 and constant-current circuit
Q1.Wherein, current-limiting resistance R4 is connected between power supply and the second end (i.e. pin 2) of voltage regulator circuit, for limiting input pressure stabilizing
The electric current of circuit.Compensation circuit C2 is connect with the first end and second end of voltage regulator circuit, for providing compensation electricity for voltage regulator circuit
Pressure and/or electric current.Constant-current circuit Q1, for control flow through temperature sensor electric current it is constant, wherein the first end of constant-current circuit
It is connect with the second end of voltage regulator circuit, the second end of constant-current circuit is connect with first resistor, 3rd resistor, the third of constant-current circuit
End connects to power supply.
It should be noted that constant-current circuit Q1 is by adjusting itself when the resistance value of temperature sensor P3 becomes larger or becomes smaller
Pressure drop, the electric current for passing through temperature sensor P3 remains unchanged.
Embodiment 2
According to embodiments of the present invention, a kind of temperature checking method embodiment is additionally provided, it should be noted that this method can
It is executed in provided temperature sensing circuit in embodiment 1.Step shown in the flowchart of the accompanying drawings can be at such as one group
It is executed in the computer system of computer executable instructions, although also, logical order is shown in flow charts, at certain
It, can be with the steps shown or described are performed in an order that is different from the one herein in a little situations.
Fig. 2 is the flow chart of temperature checking method according to an embodiment of the present invention, as shown in Fig. 2, this method includes as follows
Step:
Step S202 acquires the temperature of object to be measured.
It should be noted that the type of object to be measured is different in different application scenarios, wherein object to be measured can be
But be not limited to air themperature, water temperature, solid temperature etc..Wherein, the temperature collection circuit S1 in Fig. 1 can acquire the temperature of object to be measured
Degree.Preferably, it the temperature sensor in temperature collection circuit and object contact to be measured or is closer, but temperature sensor and temperature
The other elements in detection circuit are spent apart from farther out, cause temperature so as to avoid the other elements fever in temperature sensing circuit
There are deviations for the collected temperature of sensor, and then improve the precision of temperature detection.
The temperature coefficient sensor in addition, above-mentioned temperature sensor is positive, it is preferred that positive temperature coefficient sensor is PT1000
Sensor.
The temperature transition of object to be measured is resistance value by step S204.
It should be noted that the resistance value of temperature sensor is changed linearly with temperature.Therefore, object to be measured is being detected
After temperature, temperature sensor can be converted into resistance value.
Step S206 determines voltage value corresponding with resistance value.
In a kind of optional scheme, as shown in Figure 1, temperature sensor P3 connects with 3rd resistor R3, then pass through third
The electric current of resistance R3 is identical as by the electric current of temperature sensor P3.Again due to first resistor R1 and temperature sensor P3 tie point
Voltage be temperature sensor P3 and the both ends 3rd resistor R3 voltage, also with the electricity of first resistor R1 and the both ends second resistance R2
Press it is identical, therefore, after the resistance value that temperature sensor P3 has been determined, according to the resistance value of temperature sensor P3 i.e. can determine
The voltage of first resistor R1 and the both ends second resistance R2.Then further according to the resistance value of first resistor R1 and second resistance R2 to first
Resistance R1 and the voltage at the both ends second resistance R2 are divided, and obtain the voltage at the both ends second resistance R2 to get having arrived and resistance
It is worth corresponding voltage value, namely has obtained the input voltage of processor U1.
Step S208 exports the temperature of object to be measured according to voltage value.
Optionally, the table of comparisons of input voltage and temperature is stored in processor, for example, when temperature value is -50 DEG C, it is defeated
Entering voltage is 1.6676V；When temperature value is 200 DEG C, input voltage 2.1645V.Therefore, input processor U1 is being determined
Voltage value after, that is, can determine the temperature of object to be measured.The temperature of object to be measured can be sent to output and set by processor U1
Standby (for example, loudspeaker, display etc.), is exported the temperature of object to be measured, by output equipment so that user checks.
Based on scheme defined by above-mentioned steps S202 to step S208, it can know, using positive temperature coefficient sensor
The mode of temperature collection, by temperature collection circuit by the temperature transition of object to be measured be resistance value, with temperature collection circuit connect
The bleeder circuit connect determines the input voltage of processor according to resistance value, and the processor connecting with bleeder circuit is according to input voltage
Export the temperature of object to be measured.Wherein, temperature collection circuit includes temperature sensor, and temperature sensor is positive temperature coefficient sensing
Device.
It is easily noted that, acquires the temperature of object to be measured using positive temperature coefficient sensor in this application, and just
The temperature range that temperature coefficient sensor is able to detect that is greater than traditional temperature sensor temperature range detected, thus
Realize the technical effect for improving temperature sensing circuit temperature range detected.
It can be seen that scheme provided herein can solve the temperature range that existing temperature sensing circuit detects
Narrow technical problem.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
In the above embodiment of the invention, it all emphasizes particularly on different fields to the description of each embodiment, does not have in some embodiment
The part of detailed description, reference can be made to the related descriptions of other embodiments.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, such as the division of the unit, Ke Yiwei
A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of unit or module
It connects, can be electrical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
On unit.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can for personal computer, server or network equipment etc.) execute each embodiment the method for the present invention whole or
Part steps.And storage medium above-mentioned includes: that USB flash disk, read-only memory (ROM, Read-OnlyMemory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic or disk etc. be various to can store program code
Medium.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of temperature sensing circuit characterized by comprising
Temperature collection circuit, for being resistance value by the temperature transition of object to be measured, wherein the temperature collection circuit includes temperature
Sensor is spent, the temperature sensor is positive temperature coefficient sensor；
Bleeder circuit is connect with the temperature collection circuit, for determining the input voltage of processor according to the resistance value；
The processor is connect with the bleeder circuit, for exporting the temperature of the object to be measured according to the input voltage.
2. temperature sensing circuit according to claim 1, which is characterized in that the bleeder circuit includes:
First resistor and second resistance, wherein one end of the first resistor is connect with the temperature collection circuit, and described first
The other end of resistance is connect with the second resistance, the processor；
First capacitor is connected in parallel with the second resistance, for filtering out the noise signal in the input voltage.
3. temperature sensing circuit according to claim 2, which is characterized in that the temperature sensing circuit further include:
Voltage regulator circuit, wherein the first end of the voltage regulator circuit is connect with the temperature collection circuit, for adopting for the temperature
Collector provides constant voltage signal.
4. temperature sensing circuit according to claim 3, which is characterized in that the temperature collection circuit includes:
The temperature sensor, for acquiring the temperature of the object to be measured；
3rd resistor, wherein the first end of one end of the 3rd resistor and the voltage regulator circuit, the temperature sensor connect
It connects, the other end is connect with the third end of the voltage regulator circuit, for providing electric current for the temperature sensor.
5. temperature sensing circuit according to claim 4, which is characterized in that the positive temperature coefficient sensor is PT1000
Sensor.
6. temperature sensing circuit according to claim 4, which is characterized in that the temperature sensing circuit further include:
Current-limiting resistance is connected between power supply and the second end of the voltage regulator circuit, for limiting the input voltage regulator circuit
Electric current.
7. temperature sensing circuit according to claim 4, which is characterized in that the temperature sensing circuit further include:
Compensation circuit is connect with the first end and second end of the voltage regulator circuit, for providing compensation electricity for the voltage regulator circuit
Pressure and/or electric current.
8. temperature sensing circuit according to claim 4, which is characterized in that the temperature sensing circuit further include:
Constant-current circuit, for control flow through the temperature sensor electric current it is constant, wherein the first end of the constant-current circuit with
The second end of the voltage regulator circuit connects, and the second end of the constant-current circuit is connect with the first resistor, the 3rd resistor,
The third end of the constant-current circuit connects to power supply.
9. a kind of temperature checking method characterized by comprising
Acquire the temperature of object to be measured；
It is resistance value by the temperature transition of the object to be measured；
Determine voltage value corresponding with the resistance value；
The temperature of the object to be measured is exported according to the voltage value.
10. according to the method described in claim 9, it is characterized in that, the sensor of the temperature of the acquisition object to be measured is positive
Temperature coefficient sensor, wherein the positive temperature coefficient sensor is PT1000 sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811045361.2A CN109238495A (en) | 2018-09-07 | 2018-09-07 | Temperature sensing circuit and temperature checking method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811045361.2A CN109238495A (en) | 2018-09-07 | 2018-09-07 | Temperature sensing circuit and temperature checking method |
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| CN109238495A true CN109238495A (en) | 2019-01-18 |
Family
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| CN201811045361.2A Pending CN109238495A (en) | 2018-09-07 | 2018-09-07 | Temperature sensing circuit and temperature checking method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114235207A (en) * | 2021-12-20 | 2022-03-25 | 珠海格力电器股份有限公司 | Temperature sampling circuit, method, device, equipment, storage medium and electric automobile |
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| CN202103918U (en) * | 2011-06-23 | 2012-01-04 | 汤东东 | LED constant current drive circuit |
| CN102519167A (en) * | 2011-12-20 | 2012-06-27 | 江苏飞格光电有限公司 | Linear thermoelectric cooler (TEC) driving circuit |
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Application publication date: 20190118 |