CN110118579A - A kind of detection circuit and its temperature-humidity detecting device, temperature/humiditydetection detection system - Google Patents
A kind of detection circuit and its temperature-humidity detecting device, temperature/humiditydetection detection system Download PDFInfo
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- CN110118579A CN110118579A CN201910425171.1A CN201910425171A CN110118579A CN 110118579 A CN110118579 A CN 110118579A CN 201910425171 A CN201910425171 A CN 201910425171A CN 110118579 A CN110118579 A CN 110118579A
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- 238000001514 detection method Methods 0.000 title claims abstract description 109
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 238000005070 sampling Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 20
- 238000000034 method Methods 0.000 description 19
- 230000005611 electricity Effects 0.000 description 10
- 238000012545 processing Methods 0.000 description 6
- 238000004590 computer program Methods 0.000 description 5
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- 238000007689 inspection Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 208000002925 dental caries Diseases 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229960005486 vaccine Drugs 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/24—Housings ; Casings for instruments
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
This application discloses a kind of detection circuit and its temperature-humidity detecting device, temperature/humiditydetection detection system, which is applied to temperature-humidity detecting device, and detection circuit includes: thermistor, control circuit, the first reference resistance and the second reference resistance；Wherein, one end of thermistor connects supply voltage, and the other end connects control circuit；When control circuit is in first state, the input terminal of control circuit connects the first reference resistance；When control circuit is in the second state, the input terminal of control circuit connects the second reference resistance.Above-mentioned detection circuit improves the sampling accuracy of detection circuit so that thermistor is constantly in linear change region by accessing different reference resistances.
Description
Technical field
This application involves Temperature and Humidity technical fields, fill more particularly to a kind of detection circuit and its Temperature and Humidity
It sets, temperature/humiditydetection detection system.
Background technique
Internet of Things can be realized informationization between people and object, object and object, remote management and control as new information technology
And intelligence.The Internet of Things of the prior art carries out the temperature and humidity information of detection environment by temperature-humidity detecting device.
But current temperature-humidity detecting device can not accurately obtain always extraneous ring due to the limitation of thermistor property
The temperature and humidity information in border.
Summary of the invention
To solve the above problems, this application provides a kind of detection circuit and its temperature-humidity detecting devices, Temperature and Humidity
System is able to solve the problem of detection circuit detection inaccuracy in the prior art.
The technical solution that the application uses is: providing a kind of detection circuit, the detection circuit is applied to temperature and humidity
Detection device, the detection circuit include: thermistor, control circuit, the first reference resistance and the second reference resistance；Wherein,
One end of the thermistor connects supply voltage, and the other end connects the control circuit；When the control circuit is in first
When state, the input terminal of the control circuit connects first reference resistance；When the control circuit is in the second state,
The input terminal of the control circuit connects second reference resistance.
Another technical solution that the application uses is: providing a kind of temperature-humidity detecting device, the Temperature and Humidity dress
Set and include at least: shell, the shell include at least the first cavity and the second cavity；Temperature Humidity Sensor, setting is described the
In two cavitys, for the temperature and humidity information of environment where acquiring the temperature-humidity detecting device, the Temperature Humidity Sensor setting
Detection circuit described in having the right to require any one of 1~5；Processor is arranged in first cavity, with the temperature and humidity
Sensor is electrically connected, for receiving the temperature and humidity information of the Temperature Humidity Sensor；Wherein, first cavity and described the
It is provided with first partition between two cavitys, and is provided with through-hole between second cavity and the external world.
Another technical solution that the application uses is: providing a kind of temperature/humiditydetection detection system, the Temperature and Humidity system
System includes at least temperature-humidity detecting device and set casing, wherein the temperature-humidity detecting device is that above-mentioned Temperature and Humidity fills
It sets；The temperature-humidity detecting device is additionally provided with metal patch, and the set casing is provided with gold corresponding with the metal patch
Belong to contact, the hard contact is connected with a sensor；The set casing is provided with an accommodating space, described warm and humid for accommodating
Spend detection device；When the temperature-humidity detecting device is accommodated in the accommodating space.The metal patch and the metal
Contact contact, so that the temperature-humidity detecting device and the sensor are electrically connected.
A kind of detection circuit provided by the present application includes: thermistor, control circuit, the first reference resistance and the second reference
Resistance；Wherein, one end of thermistor connects supply voltage, and the other end connects control circuit；When control circuit is in the first shape
When state, the input terminal of control circuit connects the first reference resistance；When control circuit is in the second state, the input of control circuit
The second reference resistance of end connection；Detection circuit by accessing different reference resistance so that thermistor by control circuit with
Current reference resistance series connection, so that thermistor is constantly in linear change region, the sampling for improving thermistor is accurate
Property.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.Wherein:
Fig. 1 is the structural schematic diagram of one embodiment of the application temperature-humidity detecting device；
Fig. 2 is the exploded view of temperature-humidity detecting device in Fig. 1；
Fig. 3 is the structural schematic diagram of one embodiment of the application set casing；
Fig. 4 is the structural schematic diagram of one embodiment of the application temperature/humiditydetection detection system；
Fig. 5 is the exploded view of temperature/humiditydetection detection system in Fig. 4；
Fig. 6 is the structural schematic diagram of one embodiment of the application Temperature Humidity Sensor detection circuit；
Fig. 7 is the structural schematic diagram of another embodiment of the application Temperature Humidity Sensor detection circuit；
Fig. 8 is the flow diagram of one embodiment of the application Temperature Humidity Sensor circuit control method；
Fig. 9 is the structural schematic diagram of detection circuit in Fig. 8；
Figure 10 is the flow diagram of another embodiment of the application Temperature Humidity Sensor circuit control method；
Figure 11 is the structural schematic diagram of another embodiment of the application temperature-humidity detecting device；
Figure 12 is the structural schematic diagram of one embodiment of the application computer storage medium.
Specific embodiment
With reference to the accompanying drawings and examples, the application is described in further detail.It is emphasized that following implement
Example is merely to illustrate the application, but is not defined to scope of the present application.Likewise, following embodiment is only the portion of the application
Point embodiment and not all embodiments, institute obtained by those of ordinary skill in the art without making creative efforts
There are other embodiments, shall fall in the protection scope of this application.
The description and claims of this application and term " first ", " second ", " third ", " in above-mentioned attached drawing
The (if present)s such as four " are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should manage
The information that solution uses in this way is interchangeable under appropriate circumstances, so that embodiments herein described herein for example can be to remove
Sequence other than those of illustrating or describe herein is implemented.In addition, term " includes " and " having " and theirs is any
Deformation, it is intended that cover it is non-exclusive include, for example, containing the process, method of a series of steps or units, system, production
Product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include be not clearly listed or for this
A little process, methods, the other step or units of product or equipment inherently.
Fig. 1 and Fig. 2 are please referred to, Fig. 1 is the structural schematic diagram of one embodiment of the application temperature-humidity detecting device, and Fig. 2 is Fig. 1
The exploded view of middle temperature-humidity detecting device.The temperature-humidity detecting device 100 of the application may be mounted in cold chain environment, to obtain
The temperature information of object to be measured and/humidity information in cold chain environment.Specifically, the temperature-humidity detecting device 100 of the application with
Radio network gateway (not shown) in preset range establishes wireless channel connection, wherein a radio network gateway can be with communication link
Multiple temperature-humidity detecting devices provided by the present application 100 are connect, to realize one-to-many communication.
During cold chain, the carrier for storing object to be measured is generally refrigerating equipment or cold-chain box etc..Refrigerating equipment can be with
For refrigerator, refrigerator-freezer or refrigerating chamber etc., refrigerating equipment is mainly used for storing drug, vaccine or other articles for needing cold chain transportation.
For example, temperature-humidity detecting device 100 may be mounted inside or outside refrigerating equipment, temperature-humidity detecting device 100 is for acquiring
The temperature information and/or humidity information of refrigerating equipment internal environment or external environment.Temperature-humidity detecting device 100 collects refrigeration
After the temperature information and/or humidity information of equipment internal environment or external environment, temperature information and/or humidity information are sent to
The radio network gateway having connected, temperature information and/or humidity information are uploaded to remote server by radio network gateway.
Referring to figs. 1 and 2, the temperature-humidity detecting device 100 of the present embodiment includes shell 11, sensor 12 and processing
Device 13.
Wherein, shell 11 includes the first cavity 111 and at least one second cavity 112, and the first cavity 111 is formed by
Accommodating space is greater than or equal to the second cavity 112 and is formed by accommodating space.It is set between first cavity 111 and the second cavity 112
It is equipped with first partition 1111, the aperture (not shown) for being adapted to electric wire is provided in first partition 1111.
Processor 13 is arranged in the first cavity 111, and processor 13 is for receiving and processing temperature information and/humidity letter
Breath.Sensor 12 is arranged in the second cavity 112, and sensor 12 is used to acquire the temperature of 100 local environment of temperature-humidity detecting device
Spend information and/or humidity information.Be provided in shell 11 connection the first cavity 111 and the second cavity 112 electric wire, the one of electric wire
End connection sensor 12, the other end pass through the aperture in first partition 1111 and connect processor 13.Sensor 12 and processor 13
It is realized and is electrically connected by said wires, sensor 12 transmits collected temperature information and/or humidity information by electric wire
To processor 13.Further, processor 13 can also connect the display screen and charging interface being arranged on the first cavity 111
(not shown).
Since the electronic devices such as processor 13 and/or circuit board need encapsulation process, the first cavity 111 and external environment are not
Connection waits the vapor of electronic devices contact external environment that electronic device is caused to be damaged to avoid processor 13.First cavity
A confined space is formed in 111, and first through hole 1121 is provided on the second cavity 112, the sensor 12 in the second cavity 112
It is contacted by first through hole 1121 with external environment, can preferably detect extraneous 100 local environment of temperature-humidity detecting device
Temperature information and/or humidity information.Specifically, the setting of first through hole 1121 can make the temperature feelings in the second cavity 112
Condition and humidity condition are consistent with extraneous temperature conditions and humidity condition, thus temperature information that sensor 12 obtains and/or
The accuracy of humidity information is high.
Further, sensor 12 can correspond to first through hole 1121 and be arranged in the second cavity 112, for example, will sensing
The detection chip of device 12 corresponds to the setting of first through hole 1121, so that detection chip preferably detects temperature information and/or humidity letter
Breath.
The sensor 12 of the present embodiment can be Temperature Humidity Sensor, or heat-sensitive sensor or platinum resistance temperature pass
Sensor etc..
In the present embodiment, first through hole 1121 may include the opening of multiple spacing side by side settings, referring specifically to Fig. 1
And Fig. 2；First through hole 1121 can also be latticed through-hole or honeycomb through-hole.In other embodiments, first through hole
1121 may be the through-hole including above structure, and details are not described herein.
Second cavity 112 can also include the second through-hole 1122, and the second through-hole 1122 and first through hole 1121 are oppositely arranged
In the two sides of the second cavity 112, the position between first through hole 1121 and the second through-hole 1122 is arranged in sensor 12.Other
In embodiment, the sides adjacent in first through hole 1121 is also can be set in the second through-hole 1122.
Shell 11 can also include third cavity 113, and the area that third cavity 113 be formed by accommodating space can be with the
The area that two cavitys 112 are formed by accommodating space is identical.In the present embodiment, as shown in Figure 1, the setting of the first cavity 111 exists
The lower left of temperature-humidity detecting device 100, third cavity is arranged in the top of temperature-humidity detecting device 100, the second cavity 112
113 are arranged in the lower right of temperature-humidity detecting device 100.In other embodiments, the first cavity 111 also can be set warm and humid
The centre of detection device 100 is spent, the second cavity 112 and third cavity 113 are separately positioned on the two sides of the first cavity 111, technology
Personnel can adjust the position of the first cavity 111, the second cavity 112 and third cavity 113 according to demand.
Third cavity 113 can be used for accommodating sound mould group (not shown), wherein sound mould group can be buzzing
The devices such as device, loudspeaker or microphone.Be provided with second partition 1112 between third cavity 113 and the first cavity 111, second every
The aperture for being adapted to electric wire is again provided on plate 1112.The first cavity 111 of connection and third cavity 113 are provided in shell 11
Electric wire, one end of electric wire connects sound mould group, and the other end passes through the aperture on second partition 1112 and connects processor 13.Sound
Mould group and processor 13 are realized by said wires to be electrically connected, and processor 13 controls sound mould multicast sound reproduction sound, wherein sound
It can be alarm sound or temperature information and/or humidity information broadcast sounds.
It is identical as the second cavity 112, third through-hole (not shown), third cavity 113 are provided on third cavity 113
Interior sound mould group being capable of more preferable outwardly Ambient Transfer sound by third through-hole.
Further, third cavity 113 can also include fourth hole, the structure and setting of third through-hole and fourth hole
Mode can be identical as the structure and set-up mode of first through hole 1121 and the second through-hole 1122, and details are not described herein.
In the present embodiment, the shell 11 of temperature-humidity detecting device 100 includes at least the first cavity 111 and the second cavity
112, wherein a confined space is formed in the first cavity 111, to protect the processor 13 in the first cavity 111.Second cavity
At least provided with first through hole 1121 between 112 and the external world, so that the temperature conditions in the second cavity 112 is with humidity condition and outside
The temperature conditions and humidity condition on boundary are consistent, to improve the accuracy of the detection of sensor 12.
Present invention also provides a kind of set casings, specifically referring to Fig. 3, Fig. 3 is one embodiment of the application set casing
Structural schematic diagram.The set casing 200 of the present embodiment can be used for accommodating the temperature-humidity detecting device 100 in above-described embodiment, into
One step, set casing 200 may also adapt to a variety of installation environments, preferably to accommodate temperature-humidity detecting device 100.
As shown in figure 3, the set casing 200 of the present embodiment includes shell 21, at least three ends of shell 21 are provided with lug boss
211.Lug boss 211 extends to the opposite direction of shell 21, and the center bending to shell 21, forms a limitation space, will be warm
Humidity detector 100 is fixed on shell 21.
While fixed temperature-humidity detecting device 100, set casing 200 itself also needs to be fixed on different installation environments
On, so that temperature-humidity detecting device 100 is in varying environment temperature collection information and/or humidity information.
To meet above-mentioned condition, screw hole 22 and a kind of fixed structure 23 are provided on shell 21.It is provided on shell 21
At least two screw holes 22, as shown in figure 3, four angles of shell 21 are respectively arranged with a screw hole 22, it is solid with attachment screw
Determine the position of set casing 200.In other embodiments, shell 21 only diagonally can also be provided with corresponding two screw holes
22。
Four angles of shell 21 are additionally provided with fixed structure 23 respectively, fixed when fixed structure 23 is in first state
Structure 23 is used to fix the position of set casing 200；When fixed structure 23 is in the second state, fixed structure 23 discharges set casing
200, so that set casing 200 is detached from home position.
Specifically, the magnetic sheet 232 that fixed structure 23 includes at least accommodation groove 231 and is arranged in accommodation groove 231.Work as magnetic sheet
232 when having magnetic, and set casing 200 is fixed on metal shell by magnetic sheet 232 by magnetic absorption；When magnetic sheet 232 loses magnetic
When property, set casing 200 loses magnetism suction-operated, is detached from from metal shell.
As shown in figure 3, accommodation groove 231 may include the first accommodation groove, the second accommodation groove, third accommodation groove and the 4th accommodating
Slot；First accommodation groove, the second accommodation groove, third accommodation groove and the 4th accommodation groove are separately positioned on four angles of shell 21, to reach
To best fixed effect.
Further, fixed structure 23 can also include the sucker (not shown) being arranged in accommodation groove 231.This reality
Set casing 200 can be adsorbed on different installation environments using the gap of inside and outside atmospheric pressure for vacuum chuck by the sucker for applying example
On.For example, vacuum chuck is squeezed to shell, when needing 200 fixation surface of set casing coarse shell by vacuum chuck
Set casing 200, can be adsorbed on shell by interior air discharge；When needing will replace or remove set casing 200, toward vacuum
Air is introduced in sucker, so that the atmospheric pressure inside and outside vacuum chuck balances, set casing 200 is detached from shell.Vacuum chuck
It can be manufactured by materials such as polyurethane, nitrile rubber or polymer containing vinyl.
In other embodiments, sucker can also be magnechuck, and magnechuck utilizes electromagnetic principle, by making inner wire
Circle, which is powered, generates magnetic force, and by magnetic conduction panel, the shell by contact on magnechuck surface is tightly sucked, thus by set casing
200 is fixed.To cooperate magnechuck, it is additionally provided with switching molding group on set casing 200, switching molding group electrically connects with magnechuck
It connects.When switching molding group is in the open state, set casing 200 is fixed on metal shell by magnechuck by magnetic absorption；
When switching molding group is in close state, magnechuck discharges set casing 200, so that set casing 200 is detached from metal shell.
In the present embodiment, work as needs at least provided with screw hole 22 and fixed structure 23 on the shell 21 of set casing 200
Set casing 200 is mounted on metal shell or when with the shell of rough surface, set casing 200 passes through 23 vacuum of fixed structure
Absorption or magnetic absorption are fixed；When needing for set casing 200 to be mounted on non-metal shell or with the shell of smooth surface,
Set casing 200 is fixed by screw fit screw hole 22；By said structure design, set casing 200 be can adapt in a variety of peaces
Environment is filled, the universality of set casing 200 is improved.
Present invention also provides a kind of temperature/humiditydetection detection systems, are the application temperature and humidity referring specifically to Fig. 4 and Fig. 5, Fig. 4
Detection system unifies the structural schematic diagram of embodiment, and Fig. 5 is the exploded view of temperature/humiditydetection detection system in Fig. 4.
The temperature/humiditydetection detection system 300 of the present embodiment includes at least temperature-humidity detecting device 31 and set casing 32, wherein temperature
Humidity detector 31 can be the temperature-humidity detecting device 100 in above-described embodiment, and set casing 32 can be above-described embodiment
In set casing 200, details are not described herein.Set casing 32 is for accommodating temperature-humidity detecting device 31, so that Temperature and Humidity fills
The temperature information and/or humidity information of 300 place environment of temperature/humiditydetection detection system can be acquired by setting 31.
Set casing 32 further includes an acquisition mould group 321, and acquisition mould group 321 can be used for temperature collection information and/or humidity
Information.Acquisition mould group 321 may include Temperature Humidity Sensor 3211 and connection Temperature Humidity Sensor 3211 and set casing 32
Connecting line 3212.
Specifically, 32 bottom of set casing is provided with hard contact 322, and one end of connecting line 3212 connects hard contact 322,
The other end connects Temperature Humidity Sensor 3211.31 bottom of temperature-humidity detecting device is provided with metal corresponding with hard contact 322
Patch (not shown), when metal patch is contacted with hard contact 322, Temperature Humidity Sensor 3211 passes through connecting line 3212
It is electrically connected with temperature-humidity detecting device 31.
When temperature-humidity detecting device 31 is placed in set casing 32, hard contact 322 is contacted with metal patch, temperature and humidity inspection
The temperature information and/or humidity information of its place environment can be acquired by Temperature Humidity Sensor 3211 by surveying device 31.
For example, when temperature/humiditydetection detection system 300 needs to detect temperature information and/or humidity information inside and outside refrigerating box,
Set casing 32 can be fixed on the outer wall of refrigerating box, and temperature-humidity detecting device 31 is placed in set casing 32, so that metal touches
Point 322 is contacted with metal patch 311, and the Temperature Humidity Sensor 3211 that set casing 32 connects is placed in refrigerating box.At this point, warm and humid
Degree detection device 31 can acquire temperature information and/or humidity information outside refrigerating box, and temperature-humidity detecting device 31 passes through
The Temperature Humidity Sensor 3211 connected on set casing 32 acquires temperature information and/or humidity information in refrigerating box.
Temperature/humiditydetection detection system 300 can collect temperature information and/or humidity letter inside and outside refrigerating box simultaneously as a result,
Breath, to reach better detection effect.
Battery modules (not shown) is also provided on set casing 32, battery modules can be the electricity of 3.6V~5V
Pond group.Battery modules and hard contact 322 are electrically connected, when the metal patch 311 and hard contact of temperature-humidity detecting device 31
When 322 contact, battery modules are used to provide power supply to temperature-humidity detecting device 31 and Temperature Humidity Sensor 3211.
For example, when the temperature information inside and outside temperature/humiditydetection detection system 300 detects refrigerating box and/or when humidity information, battery
Mould group provides power supply to Temperature Humidity Sensor 3211, if when 31 electricity shortage of temperature-humidity detecting device or stopping power supply, battery mould
Group provides power supply to temperature-humidity detecting device 31, to maintain temperature/humiditydetection detection system 300 to work normally.
Be also provided on set casing 32 processing mould group (not shown), processing Mo Zu respectively with battery modules and gold
Belong to contact 322 to be electrically connected.Handling mould group can be under temperature-humidity detecting device 31 and the discontiguous situation of set casing 32, control
The temperature information and/or humidity information of the acquisition environment of Temperature Humidity Sensor 3211.
For example, processing mould group controls Temperature Humidity Sensor when temperature-humidity detecting device 31 is not placed in set casing 32
The temperature information and/or humidity information of 3211 acquisition environment；After temperature-humidity detecting device 31 is placed in set casing 32, mould is handled
Block detects that processing module sends collected temperature information and/or humidity information when connecting above temperature-humidity detecting device 31
The temperature that Temperature Humidity Sensor 3211 continues acquisition environment is controlled to temperature-humidity detecting device 31, and by temperature-humidity detecting device 31
Information and/or humidity information.
Present invention also provides a kind of detection circuits, are the application Temperature Humidity Sensors referring specifically to Fig. 6 and Fig. 7, Fig. 6
The structural schematic diagram of one embodiment of detection circuit, Fig. 7 are the structures of another embodiment of the application Temperature Humidity Sensor detection circuit
Schematic diagram.The detection circuit 400 of the present embodiment can be applied to the sensor 12 of temperature-humidity detecting device 100 in Fig. 1, can also be with
The Temperature Humidity Sensor 3211 connected applied to set casing 32 in Fig. 4.
Detection circuit 400 specifically can be set on the FPC wiring board of Temperature Humidity Sensor, be provided in detection circuit 400
Thermistor 41.The characteristics of thermistor 41 be it is temperature sensitive, show different resistance values at different temperature, according to
The relationship of thermistor 41 and temperature, thermistor 41 can be used for detecting environment temperature.Thermistor 41 is according to temperature coefficient
Difference is divided into posive temperature coefficient thermistor (PTC) and negative tempperature coefficient thermistor (NTC), and posive temperature coefficient thermistor exists
Resistance value is bigger when temperature is higher, and negative tempperature coefficient thermistor resistance value when temperature is higher is small.In the present embodiment, it detects
Thermistor 41 on circuit 400 belongs to negative tempperature coefficient thermistor；In other embodiments, thermistor 41 may be
Posive temperature coefficient thermistor, details are not described herein.
Control circuit 42, reference resistance group, counting circuit 44 are additionally provided in detection circuit 400.Wherein, thermistor 41
One end connect VCC supply voltage, supply voltage export 3.6V/5.0V DC voltage；The other end of thermistor 41 connects
Control circuit 42.A certain reference resistance in the input terminal connection reference resistance group of control circuit 42, specifically, reference resistance group
Including at least the first reference resistance 431 and the second reference resistance 432, when control circuit 42 is in first state, control circuit
42 input terminal connects the first reference resistance 431；When control circuit 42 is in the second state, the input terminal of control circuit 42 connects
Connect the second reference resistance 432.
The input terminal of counting circuit 44 connects thermistor 41, for obtaining the temperature of environment according to the resistance value of thermistor 41
Spend information.Counting circuit 44 can be by the resistance value of detection thermistor 41, then according to the corresponding temperature of thermistor 41
Resistance value table exports the corresponding temperature information of the resistance value.
As shown in fig. 7, counting circuit 44 can also include adc circuit 441 (D/A converting circuit).Adc circuit 441 is used for
Continuously varying analog signal is converted to discrete digital signal, in the present embodiment, continuously varying analog signal can be with
For current signal or voltage signal, adc circuit 441 will export 12 according to the current signal of thermistor 41 or voltage signal
AD numerical value.
Specifically, when the input terminal of control circuit 42 is not connected to the first reference resistance 431 or the second reference resistance 432,
Adc circuit 441 exports the first AD numerical value；When the input terminal of control circuit 42 connects the first reference resistance 431, adc circuit 441
Export the 2nd AD numerical value；When the input terminal of control circuit 42 connects the second reference resistance 432, adc circuit 441 exports the 3rd AD
Numerical value.
Counting circuit 44 is further according to the more above-mentioned first AD numerical value of preset rules, the 2nd AD numerical value and the 3rd AD number
Value, for example, comparing the half numerical value and the 2nd AD numerical value of the first AD numerical value, obtains the absolute value of the first difference；Compare the first AD
The half numerical value and the 3rd AD numerical value of numerical value, obtain the absolute value of the second difference.If it is poor that the absolute value of the first difference is greater than second
The absolute value of value then shows resistance value of the resistance value of thermistor 41 at this time closest to the second reference resistance 432, control circuit
42 are set as the second state according to comparison result, that is, connect the second reference resistance 432.If the absolute value of the first difference is less than second
The absolute value of difference then shows the resistance value of thermistor 41 at this time closest to the resistance value of the first reference resistance 431, control electricity
Road 42 is set as first state according to comparison result, that is, connects the first reference resistance 431.
Control circuit 42 connects the circuit theory of the first reference resistance 431 or the second reference resistance 432 according to comparison result
As follows: the resistance value of thermistor 41 is significant non-linear with having when temperature change, when the voltage value of thermistor 41 connects
When the half of the voltage value of nearly supply voltage output, the resistance change of thermistor 41 is closest to linear change.For example, when electricity
When the voltage of source voltage output 3.6V, the corresponding range of voltage values in linear change region of thermistor 41 is 1.6V~2.0V；
When supply voltage exports 5.0V, the corresponding range of voltage values in linear change region of thermistor 41 is 1.6V~2.0V.Cause
This, the detection circuit 400 of the present embodiment needs the similar reference resistance of a resistance value of connecting to thermistor 41.
Specifically, the reference resistance of different ranges is provided in reference resistance group, for example, reference resistance group can also include
Third reference resistance 433 and the 4th reference resistance 434.Wherein, the resistance value of the first reference resistance 431 is 10K Ω, the second reference
The resistance value of resistance 432 is 100K Ω, and the resistance value of third reference resistance 433 is 1000K Ω, the electricity of the 4th reference resistance 434
Resistance value is 10000K Ω.In other embodiments, the reference resistance of different ranges can have other resistance in reference resistance group
The resistance of value, details are not described herein.
Control circuit 42 includes at least four throw switch 422 of hilted broadsword, and one end of four throw switch 422 of hilted broadsword connects thermistor
41, the other end is hanging or the first reference resistance 431 of connection, the second reference resistance 432, third reference resistance 433 or the 4th join
Examine one in resistance 434.
In the present embodiment, detection circuit 400 detects by accessing different reference resistances and is accessing different reference electricity
When resistance, the half for the voltage value whether voltage value of thermistor 41 exports close to supply voltage；If so, control circuit 42 is adjusted
Whole state, so that thermistor 41 is connected by control circuit 42 with current reference resistance, so that thermistor 41 is always
In linear change region, the sampling accuracy of thermistor 41 is improved.
Above-described embodiment improves the sampling accuracy of thermistor 41 by hardware, and similarly, the present embodiment can also lead to
Crossing software control improves the sampling accuracy of thermistor 41.It is the application temperature and humidity sensing referring specifically to Fig. 8 and Fig. 9, Fig. 8
The flow diagram of one embodiment of device circuit control method, Fig. 9 are the structural schematic diagrams of detection circuit in Fig. 8.
The detection circuit 500 of the present embodiment includes at least thermistor 51, adc circuit 52, control circuit 53, first and refers to
Resistance 541 and the second reference resistance 542；Wherein, one end of thermistor 51 is connect with adc circuit 52, the other end and control electricity
Road 53 connects.
The control method of the present embodiment is for the reference resistance to one appropriate resistance of series connection of thermistor 51, so that hot
The voltage value of quick resistance 51 is able to maintain within the scope of with the preset voltage value of the half of supply voltage output voltage values；It is pre- herein
If when in range of voltage values, thermistor 51 has preferable sampling accuracy, detection circuit 500 is able to detect that accurate temperature
Spend information.
As shown in figure 8, the control method of the present embodiment specifically includes the following steps:
S601: control control circuit accesses the first reference resistance, and obtains the first detection numerical value of adc circuit.
Wherein, detection circuit 500 controls control circuit 53 and accesses the first reference resistance 541, at this point, the one of thermistor 51
End connection supply voltage, the other end connect the first reference resistance 541, i.e. the first reference resistance 541 is connected with thermistor 51.
Adc circuit 52 will be converted to discrete digital signal by the continuously varying analog signal of thermistor 51, in the present embodiment
In, continuously varying analog signal can be current signal or voltage signal, and adc circuit 52 is believed according to the electric current of thermistor 51
Number or voltage signal export 12 first detection numerical value.
S602: control control circuit accesses the second reference resistance, and obtains the second detection numerical value of adc circuit.
Wherein, step S602 is similar with above-mentioned steps 601, and details are not described herein.The second reference is obtained by step S602
Resistance 542 corresponding second detects numerical value.
S603: judge whether the difference of the first detection numerical value and default detection numerical value detects numerical value and default inspection less than second
Survey the difference of numerical value.
Wherein, numerical value, the second inspection are detected according to first that the relatively more default detection numerical value of preset rules and above-mentioned steps obtain
Survey numerical value.Judge whether the difference of the first detection numerical value and default detection numerical value detects numerical value and default detection numerical value less than second
Difference, wherein default detection numerical value is arranged according to the property of thermistor 51, for example, default detection numerical value can be temperature-sensitive
Resistance 51 is in the half of the corresponding voltage value of central point in linear change region.
Wherein, above-mentioned difference is the absolute of the difference of the first detection numerical value or the second detection numerical value and default detection numerical value
Value.
Further, presetting detection numerical value can also determine by the following method: when control circuit 53 does not access the first ginseng
When examining resistance 541 or the second reference resistance 542, i.e., thermistor 51 does not access cascode reference resistance, and adc circuit 52 is according to temperature-sensitive
The 5th detection numerical value of current signal or voltage signal output of resistance 51, and default inspection is set by the half of the 5th detection numerical value
Survey numerical value.If control circuit 53 is single pole multiple throw, at this point, single pole multiple throw is in vacant state.
If the difference of the first detection numerical value and default detection numerical value is less than the difference of the second detection numerical value and default detection numerical value
Value, then enter step S604；The difference of first detection numerical value and default detection numerical value is greater than or equal to the second detection numerical value and pre-
If detecting the difference of numerical value, then S605 is entered step.
Control circuit 53 connects the circuit theory of the first reference resistance 541 or the second reference resistance 542 according to comparison result
As follows: the resistance value of thermistor 51 is significant non-linear with having when temperature change, when the voltage value of thermistor 51 connects
When the half of the voltage value of nearly supply voltage output, the resistance change of thermistor 51 is closest to linear change.For example, when electricity
When the voltage of source voltage output 3.6V, the corresponding range of voltage values in linear change region of thermistor 51 is 1.6V~2.0V；
When supply voltage exports 5.0V, the corresponding range of voltage values in linear change region of thermistor 51 is 1.6V~2.0V.Cause
This, the detection circuit 500 of the present embodiment needs the similar reference resistance of a resistance value of connecting to thermistor 51.
S604: control control circuit accesses the first reference resistance.
Wherein, control control circuit 53 accesses the first reference resistance 541, so that thermistor 51 and the first reference resistance
541 series connection.
S605: control control circuit accesses the second reference resistance.
Wherein, control control circuit 53 accesses the second reference resistance 542, so that thermistor 51 and the second reference resistance
542 series connection.
Control method through this embodiment, the reference resistance that selection meets conditions above are connected with thermistor 51, with
The thermistor 51 made is constantly in linear change region, improves the sampling accuracy of thermistor 51.
Detection circuit 500 can also include third reference resistance 543 and the 4th reference resistance 544, wherein first with reference to electricity
Hinder the resistance value that the 541, second reference resistance 542, third reference resistance 543 and the 4th reference resistance 544 have different ranges.Example
Such as, the resistance value of the first reference resistance 541 is 10K Ω, and the resistance value of the second reference resistance 542 is 100K Ω, and third is with reference to electricity
The resistance value of resistance 543 is 1000K Ω, and the resistance value of the 4th reference resistance 544 is 10000K Ω.In other embodiments, above
The reference resistance of different ranges can have the resistance of other resistance values, and details are not described herein.
The application also need to consider to connect certain resistance value to thermistor 51 reference resistance after, if so that temperature-sensitive is electric
Resistance 51 is in linear change region.To solve the above problems, before the step 603 of above-described embodiment, present invention also provides
Control method of the another kind based on Temperature Humidity Sensor circuit is the application Temperature Humidity Sensor referring specifically to Figure 10, Figure 10
The flow diagram of another embodiment of circuit control method.
As shown in Figure 10, the present embodiment control method specifically includes the following steps:
S701: judge that the difference of the first detection numerical value and default detection numerical value and second detects numerical value and default detection numerical value
Difference whether be all larger than default value.
Wherein, if the difference of the first detection numerical value and default detection numerical value is greater than default value, illustrate thermistor 51
When connecting with the first reference resistance 541, thermistor 51 is in the region other than linear change region；At this point, thermistor 51
Sampling accuracy can not improve.If the first detection numerical value and the second detection numerical value are all satisfied above-mentioned condition, illustrate to access
First reference resistance 541 or the second reference resistance 542 can not improve the sampling accuracy of thermistor 51, enter step
S702。
S702: control control circuit does not access the first reference resistance or the second reference resistance.
Wherein, control control circuit 53 does not access the first reference resistance 541 or the second reference resistance 542；If control circuit
53 be single pole multiple throw, at this point, single pole multiple throw is in vacant state.
For the control method for realizing above-described embodiment, the application also proposed another temperature-humidity detecting device, specifically ask
1, Figure 11 is the structural schematic diagram of another embodiment of the application temperature-humidity detecting device refering to fig. 1.
As shown in figure 11, temperature-humidity detecting device 800 includes processor 81 and memory 82；Meter is stored in memory 82
Calculation machine program, processor 81 is for the step of executing computer program to realize the control method such as above-described embodiment.
In terms of computer program, if its as independent software product when selling or using, be storable in computer
In storage medium, thus the application proposes a kind of computer storage medium.Figure 12 is please referred to, Figure 12 is the storage of the application computer
The structural schematic diagram of one embodiment of medium is stored with computer program 91, computer in the present embodiment computer storage medium 900
Program 91 realizes the control method of above-described embodiment when being executed by processor.
The computer storage medium 900 is specifically as follows USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. can store calculating
The medium of machine program, or may be the server for being stored with the computer program, which can be by the computer of storage
Program is sent to other equipment operation, or can also be with the computer program of the self-operating storage.The computer storage medium 900
It can be the combination of multiple entities from physical entity, such as multiple servers, server add memory or memory
Add the multiple combinations mode such as mobile hard disk.
The foregoing is merely presently filed embodiments, are not intended to limit the scope of the patents of the application, all to utilize this
Equivalent structure or equivalent flow shift made by application specification and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field similarly includes in the scope of patent protection of the application.
Claims (10)
1. a kind of detection circuit, which is characterized in that the detection circuit is applied to temperature-humidity detecting device, the detection circuit packet
It includes: thermistor, control circuit, the first reference resistance and the second reference resistance；
Wherein, one end of the thermistor connects supply voltage, and the other end connects the control circuit；When the control circuit
When in first state, the input terminal of the control circuit connects first reference resistance；When the control circuit is in the
When two-state, the input terminal of the control circuit connects second reference resistance.
2. detection circuit according to claim 1, which is characterized in that the detection circuit further includes counting circuit, described
The input terminal of counting circuit connects the thermistor, and the temperature for obtaining environment according to the resistance value of the thermistor is believed
Breath.
3. detection circuit according to claim 2, which is characterized in that the counting circuit further includes adc circuit；
When the input terminal of the control circuit is not connected to first reference resistance or second reference resistance, the ADC
Circuit output first detection signal；
When the input terminal of the control circuit connects first reference resistance, the second detection of adc circuit output signal；
When the input terminal of the control circuit connects second reference resistance, the adc circuit output third detects signal；
The counting circuit is examined according to the preset rules first detection signal, the second detection signal and the third
Signal is surveyed, and exports control signal to control circuit, so that the control circuit is according to control signal connection described first
Reference resistance or second reference resistance.
4. detection circuit according to claim 3, which is characterized in that the detection circuit further include third reference resistance and
4th reference resistance；
Wherein, the resistance value of first reference resistance is 10K Ω, and the resistance value of second reference resistance is 100K Ω, institute
The resistance value for stating third reference resistance is 1000K Ω, and the resistance value of the 4th reference resistance is 10000K Ω；
When the control circuit is in the third state, the input terminal of the control circuit connects the third reference resistance；When
When the control circuit is in four states, the input terminal of the control circuit connects the 4th reference resistance.
5. detection circuit according to claim 4, which is characterized in that the control circuit includes at least hilted broadsword four-throw and opens
Close, one end of four throw switch of hilted broadsword connects the thermistor, the other end according to the connection first reference resistance,
Second reference resistance, the third reference resistance or the 4th reference resistance.
6. a kind of temperature-humidity detecting device, which is characterized in that the temperature-humidity detecting device includes at least:
Shell, the shell include at least the first cavity and the second cavity；
Temperature Humidity Sensor is arranged in second cavity, the temperature for environment where acquiring the temperature-humidity detecting device
Humidity information, the Temperature Humidity Sensor are provided with detection circuit according to any one of claims 1 to 5；
Processor is arranged in first cavity, is electrically connected with the Temperature Humidity Sensor, for receiving the temperature and humidity
The temperature and humidity information of sensor；
Wherein, first partition, and second cavity and the external world are provided between first cavity and second cavity
Between be provided with through-hole.
7. temperature-humidity detecting device according to claim 6, which is characterized in that the through-hole include at least first through hole and
Second through-hole, the first through hole and second through-hole are oppositely arranged on the two sides of second cavity；
Wherein, the Temperature Humidity Sensor is set between the first through hole and second through-hole.
8. temperature-humidity detecting device according to claim 6, which is characterized in that the through-hole includes that multiple spacing side by side are set
The opening set or the through-hole are latticed through-hole or honeycomb through-hole.
9. a kind of temperature/humiditydetection detection system, which is characterized in that the temperature/humiditydetection detection system includes at least temperature-humidity detecting device
And set casing, wherein the temperature-humidity detecting device is temperature-humidity detecting device described in any one of claim 6~8；
The temperature-humidity detecting device is additionally provided with metal patch, and the set casing is provided with gold corresponding with the metal patch
Belong to contact, the hard contact is connected with a sensor；The set casing is provided with an accommodating space, described warm and humid for accommodating
Spend detection device；
When the temperature-humidity detecting device is accommodated in the accommodating space, the metal patch connects with the hard contact
Touching, so that the temperature-humidity detecting device and the sensor are electrically connected.
10. temperature/humiditydetection detection system according to claim 9, which is characterized in that the set casing includes front and back,
Positive at least three ends of the set casing are provided with lug boss, and the lug boss is for fixing the temperature-humidity detecting device；Institute
The back side for stating set casing is provided with
Screw hole, the position for the fixed set casing of attachment screw；
Accommodation groove is provided with fixed structure in the accommodation groove, when the fixed structure is in first state, the fixed knot
Structure is used to fix the position of the set casing；When the fixed structure is in the second state, the fixed structure is put described solid
Determine shell.
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Cited By (1)
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|---|---|---|---|---|
| CN112278450A (en) * | 2020-11-09 | 2021-01-29 | 河南颂达信息技术有限公司 | A screening packing plant for thermistor production |
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