CN105786057B - Machine room's temperature and humidity regulation system - Google Patents
Machine room's temperature and humidity regulation system Download PDFInfo
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- CN105786057B CN105786057B CN201610169505.XA CN201610169505A CN105786057B CN 105786057 B CN105786057 B CN 105786057B CN 201610169505 A CN201610169505 A CN 201610169505A CN 105786057 B CN105786057 B CN 105786057B
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- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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Abstract
The invention discloses a kind of machine room's temperature and humidity regulation system, belong to machine room's environmental monitoring regulation technology field, including induction installation, focus on device, air-conditioning, dehumidifier and humidifier, induction installation is arranged in machine room, focus on device connection air-conditioning, dehumidifier and humidifier, integrated sensor detection temperature and relative humidity are provided with induction installation, integrated type sensor includes semiconductor detection unit, two times transfer unit, signal processing unit and display, and two semiconductor gauge R are provided with semiconductor detection unitε1And Rε2It is r installed in radius0Diaphragm on, the output end connecting secondary converting unit of semiconductor detection unit, two times transfer unit output end connection signal processing unit, signal processing unit connection focus on device.The present invention is solved in machine room, due to the influence of temperature and relative humidity to printing work, personal monitoring's environment adjusting ambient it is with high costs the problem of, have automation the advantages of.
Description
Technical field
The invention belongs to machine room's environmental monitoring regulation technology field, it is related to temperature and humidity monitor and the regulation side of environment
To, and in particular to a kind of machine room's temperature and humidity regulation system.
Background technology
During print production, the reason for workshop temperature, humidity and ink property, machine room needs to keep certain temperature
Degree and relative humidity, if temperature is too high, relative humidity is too low, and the solvent flashing in ink will be vapored away soon, ink
Viscosity uprise, so as to block mesh.Secondly, temperature is too low, and ink mobility difference grandfather easily produces scumming, so machine room
The detection of temperature and relative humidity in production is critically important, and also needs to adjust when humiture inadaptable production, from
And reduce the influence to printing, but the detection and regulation of temperature and relative humidity are, it is necessary to which substantial amounts of manpower completion, occupies labor
Power, lack automated system.
The content of the invention
According to above the deficiencies in the prior art, the technical problems to be solved by the invention are to propose that a kind of machine room is warm and humid
Regulating system is spent, by installing integrated environment detection sensor in machine room, printing environment situation is understood in real time, solves
In machine room, due to the influence of temperature and relative humidity to printing work, personal monitoring's environment adjusting ambient it is with high costs
The problem of, there is the advantages of automation, save manpower, the function with automatic detection environment temperature and relative humidity, and
Also it is adjusted, is adjusted in the range of appropriate threshold automatically according to humiture.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of machine room's temperature and humidity regulation system
System, machine room's temperature and humidity regulation system include induction installation, focus on device, air-conditioning, dehumidifier and humidifier, sense
Device be arranged on machine room in, induction installation, which is wirelessly connected to, focuses on device, focus on device output end connection air-conditioning,
Dehumidifier and humidifier, induction installation is interior to be provided with integrated sensor detection temperature and relative humidity, and integrated type sensor includes half
Conductor detection unit, two times transfer unit, signal processing unit and display, two semiconductors are provided with semiconductor detection unit
Foil gauge Rε1And Rε2It is r installed in radius0Diaphragm on, semiconductor gauge be pressurized change output resistance response, partly lead
The output end connecting secondary converting unit of body detection unit, two times transfer unit receive the output signal of semiconductor detection unit,
Electrical response signal is converted to pulse width signal, the output end connection signal transacting list of two times transfer unit by two times transfer unit
Member, the output signal of signal processing unit Decoupling Analysis two times transfer unit, signal processing unit connection focus on device.
In said system, the induction installation also includes microprocessor and warning lamp, and integrated type sensor is connected to micro- place
On the input for managing device, the real-time detector data of integrated type sensor is sent to microprocessor, and warning lamp is connected to microprocessor
Output end.The induction installation also includes wireless communication unit, and induction installation is concentrated by wireless communication unit wireless connection
Processor, induction installation and focuses on wireless transmission of signals and instruction between device.Described focus on is provided with analysis list in device
Member, instruction execution unit and man-machine interaction unit, analytic unit link order execution unit, man-machine interaction unit linking parsing list
Member, instruction execution unit connection air-conditioning, dehumidifier and humidifier.
In above-mentioned integrated type sensor, in the semiconductor detection unit, a semiconductor gauge is arranged on center of circle position
Put, another semiconductor gauge is arranged on centered on the diaphragm center of circle, radius 0.89r0Concentric circles position on.Described two
Secondary converting unit includes two identical pulse signal change-over circuits, semiconductor gauge one pulse signal of corresponding connection
Change-over circuit, pulse signal change-over circuit include 555 timers, resistance R and electric capacity C, and resistance R is connected to No. 2 of 555 timers
Between pin and No. 3 pins, electric capacity C is connected on No. 2 pins of 555 timers, and No. 2 pins and No. 6 pin short circuits, No. 3 are drawn
Pin and No. 7 pin short circuits, No. 7 pin output pulse width signals of 555 timers to signal processing unit.The diaphragm is according to partly leading
The strain variation of two semiconductor gauges in body detection unit is divided into normal strain section and negative strain section, with radius
0.63r0Concentric circles be boundary.Filament saturation water vapor partial pressure table is provided with the signal processing unit, signal processing unit utilizes
Temperature value calls corresponding saturation vapour partial pressure value.The integrated type sensor is arranged in the cup-shaped support of cylinder, diaphragm
The upper surface of cup-shaped support is arranged on, diaphragm selects brass diaphragm, and aeroseal chamber is provided between cup-shaped support and brass diaphragm,
Two semiconductor gauges are arranged on the surface of brass diaphragm.
Present invention has the advantages that:The present invention provides a kind of machine room's temperature and humidity regulation system, can be detected in system
Temperature and relative humidity real time data, and data judgement can be carried out according to given threshold scope, it is not inconsistent in temperature and relative humidity
When conjunction in the range of optimal threshold, the regulation of trip temperature and relative humidity can be entered by air-conditioning, dehumidifier and humidifier, from
And adjust the environmental aspect of machine room.
Brief description of the drawings
The content expressed by this specification accompanying drawing and the mark in figure are briefly described below：
Fig. 1 is the work structuring block diagram of machine room's temperature and humidity regulation system of the embodiment of the present invention.
Fig. 2 be the present invention embodiment sensor in foil gauge scheme of installation.
Fig. 3 is the structural representation of the sensor of the embodiment of the present invention.
Fig. 4 is the diagram of strains of the foil gauge of the embodiment of the present invention.
Fig. 5 is the sensor operating principles structured flowchart of the embodiment of the present invention.
Fig. 6 is the signal flow block diagram of the sensor of the embodiment of the present invention.
Fig. 7 is the pulse width signal change-over circuit figure of the embodiment of the present invention.
1 is cup-shaped support in figure, and 2 be aeroseal chamber, and 3 be diaphragm, and 4 be semiconductor gauge Rε1, 5 be semiconductor strain
Piece Rε2。
Embodiment
Below against accompanying drawing, by the description to embodiment, for example involved each component of embodiment of the invention
Shape, construction, the mutual alignment and annexation between each several part, the effect of each several part and operation principle, manufacturing process and
Operate with method etc., is described in further detail, to help those skilled in the art to inventive concept of the invention, technology
Scheme has more complete, accurate and deep understanding.
As shown in figure 1, machine room's temperature and humidity regulation system include induction installation, focus on device, air-conditioning, dehumidifier and
Humidifier, induction installation are arranged in machine room, and more installations are several near printing machine, and induction installation is wirelessly connected to collection
Middle processor, output end connection air-conditioning, dehumidifier and the humidifier of device are focused on, according to the real-time detector data of induction installation
Work order is sent to air-conditioning, dehumidifier and humidifier, and then realizes the detection and regulation of machine room's environment.
Induction installation is arranged near the printing machine of machine room, is uniformly distributed, and comprehensive detection printing machine is nearby in environment
The temperature of each point and the situation of relative humidity, is provided with integrated type sensor in induction installation, tested point can be measured simultaneously
Temperature and relative humidity and atmospheric pressure value, it is simple in construction, cost is cheap.Wireless communication unit is additionally provided with induction installation, is connected
On device is focused on, wireless communication unit wirelessly sends/reception signal to integrated processor, and induction installation is single
Only individual, can arbitrarily it move, thus without limitation on the installation site and installation environment of induction installation, after induction installation
Face is fixed on tested point, is fixed on using the mode such as stickup, hook, screw thread on tested point.The channel radio of each induction installation
Mark number can be all provided with by believing in unit, for when induction installation transmits a signal to and focuses on device, conveniently focusing on
The source direction of device analyze data, and microprocessor and warning lamp are additionally provided with each induction installation, warning lamp is connected to micro-
The output end of processor, integrated type sensor of the present invention are connected on the input of microprocessor, and wireless communication unit is connected to
In the output end of microprocessor.Integrated type sensor detects that being sent to microprocessor after the ambient-signal data of machine room enters
OK, detection signal is sent to device is focused on by wireless communication unit, focus on analysis in device and judge machine room's environment
Whether in suitable threshold range, alarm is sent if beyond threshold range, reminds work to check in time.In order to facilitate work
Out-of-the way position is quickly found out, device is focused on and can send alarm and feed back signal to corresponding microprocessor, microprocessor is sent
Warning lamp, warning lamp flicker, so as to remind staff to take measures in time are arrived in flicker instruction.
Situation in machine room have the high relative humidity of temperature is low, the high relative humidity of temperature is high, temperature low relative humidity is low,
A variety of situations such as temperature low relative humidity height, normal, still, once the humiture of machine room is abnormal, if manually carried out auxiliary
Help if improving, it is necessary to manually found the abnormal situation and acted in time at any time.In order to reduce cost of labor, so of the invention
In be provided with air-conditioning, dehumidifier and humidifier, the situation of comprehensive automation regulation temperature and relative humidity, only system is predetermined
Expected results can not be reached in time, can just send different alarm and remindings, remind staff to check and carry out back work.
Idle call raises temperature or reduces temperature, and dehumidifier is used for reducing relative humidity, humidifier is used for increasing humidity, air-conditioning, removes
Wet device and humidifier, which are both connected to, to be focused on device, and is operated according to the instruction for focusing on device.
Focus on and analytic unit, instruction execution unit, man-machine interaction unit are provided with device, induction installation sends inspection in real time
Data are surveyed to device is focused on, the analytic unit in device is focused on and carries out data analysis, temperature threshold is provided with analytic unit
With the threshold range of relative humidity, real-time detector data is judged whether in threshold value, if in threshold range, then it represents that environment
Situation is to be adapted to production, if not in threshold range, output environment real-time detector data and the result beyond threshold value show
Show on the display of man-machine interaction unit.Meanwhile focus on device can also export corresponding regulating command to instruction perform list
Member, instruction execution unit are connected to air-conditioning, dehumidifier and humidifier, start air-conditioning according to the real-time condition of temperature and relative humidity
Or dehumidifier or humidifier, enter the regulation of trip temperature and relative humidity.
Focus in device to also have and open air-conditioning, dehumidifier and the timing unit of humidifier working time, timing unit connects
It is connected on and focuses on device, timing is carried out when air-conditioning, dehumidifier and humidifier are started working, records air-conditioning respectively, removes
How long wet device and humidifier have worked, and timing unit is provided with predetermined time threshold, in time threshold, focuses on device
Judge whether temperature and relative humidity are returned in OK range, if do not returned in OK range, focus on device
Will signal an alert remind, such as a variety of alerting patterns of voice reminder, siren, light, remind staff, system can not
Improve the environment of machine room in time, make a request for help assistance, avoids prolonged ambient temperature and humidity improper, influences printing quality
Amount.
In addition, integrated type sensor provided by the invention is the improvement carried out to conventional sensor, measurement accuracy is higher,
As a result it is simple, and the atmospheric pressure value of machine room is capable of detecting when simultaneously, ensure that air pressure is normal in workshop, avoids low pressure from influenceing machine
The problem of device work production.
Integrated type sensor provided by the invention is improved integrated test amount temperature and the sensor of relative humidity, including
Semiconductor detection unit, two times transfer unit and signal processing unit, two semiconductor strains are provided with semiconductor detection unit
Piece Rε1And Rε2It is r installed in radius0Diaphragm on, semiconductor gauge by piezoresistance change output resistance respond, partly lead
The output end connecting secondary converting unit of body detection unit, two times transfer unit receive the output signal of semiconductor detection unit,
Electrical response signal is converted to pulse width signal, the output end connection signal transacting list of two times transfer unit by two times transfer unit
Member, the output signal of signal processing unit Decoupling Analysis two times transfer unit, signal processing unit microprocessor send and calculated
Mount point temperature, relative humidity and atmospheric pressure.
In the semiconductor detection unit, the resistance change of two semiconductor gauges is equal, one of semiconductor
Foil gauge is arranged on home position, and another semiconductor gauge is arranged on radius 0.89r0Concentric circles position on.It is described
Two times transfer unit includes two identical pulse signal change-over circuits, and a semiconductor gauge is corresponding to connect a pulse letter
Number change-over circuit, pulse signal change-over circuit include 555 timers, resistance R and electric capacity C, and resistance R is connected to the 2 of 555 timers
Number between pin and No. 3 pins, electric capacity C is connected on No. 2 pins of 555 timers, No. 2 pins and No. 6 pin short circuits, No. 3
Pin and No. 7 pin short circuits, No. 7 pin output pulse widths of 555 timers are signally attached to signal processing unit.The pulse letter
The pulse width conversion formula of number change-over circuit is τ=ln2CR, and τ is output pulse width in formula, and R is the resistance in circuit, and C is cloud
Female mark pseudo-capacitance, pulsewidth output τ are directly proportional to respective institute connecting resistance R.Two in semiconductor detection unit of the diaphragm
The strain variation of semiconductor gauge is divided into normal strain section and negative strain section, with radius 0.63r0Concentric circles be boundary.Institute
State and GPS unit and atmospheric pressure numerical tabular are provided with signal processing unit, GPS unit, which is connected on signal processing unit, to be used for positioning
The longitude and latitude of sensor mount point, inquire about the atmospheric pressure numerical value of mount point.Filament saturation water is provided with the signal processing unit
Vapour partial pressure table, signal processing unit call corresponding saturation vapour partial pressure value using temperature.The integrated type sensor is arranged on
In the cup-shaped support 1 of cylinder, diaphragm 3 is arranged on the upper surface of cup-shaped support 1, and diaphragm 3 selects brass diaphragm, cup-shaped support 1
Aeroseal chamber 2 is provided between brass diaphragm, two semiconductor gauges 4 and 5 are arranged on the surface of brass diaphragm.
The signal processing unit utilizes the difference of steam partial pressure and sensitive resistance in air, the arteries and veins after quadratic transformation
The difference of counting wide and its to frequency all the time is directly proportional, and the counting sum of atmospheric temperature and sensing element is in the corresponding letter of monodrome
Number relation, calculates differential pressure value suffered by foil gauge, steam partial pressure value and temperature value.The signal processing unit is satisfied using temperature
With water vapor partial pressure table, corresponding saturation vapour partial pressure value is called using temperature value, is calculated relatively according to the formula of relative humidity
Humidity.
A kind of control method of integrated type sensor, methods described step include：Step 1: connection install sensor electricity
Road, two semiconductor gauge collecting temperatures and air pressure are set；Step 2: the installation site of two semiconductor gauges of adjustment,
Confirm that the resistance change of two semiconductor gauges is equal；Step 3: the resistance change of semiconductor gauge is input to two
Secondary converting unit carries out pulse width conversion, output pulse width signal；Step 4: signal processing unit receives the output of two times transfer unit
Pulse width signal, the variable quantity of semiconductor gauge is analyzed using Dalton's law, foil gauge principle and analytic method, parses temperature
With steam partial pressure information, the relative humidity and atmospheric pressure of tested point are calculated；Step 5: signal processing unit connects microprocessor
Device.
The signal processing unit utilizes the difference of steam partial pressure and sensitive resistance semiconductor gauge in air, through two
Pulsewidth after secondary conversion and its difference of the counting to frequency all the time are directly proportional, the counting sum of atmospheric temperature and sensitive resistance
Logarithm inversely, calculate differential pressure value Δ P, steam partial pressure P suffered by foil gaugeWWith temperature value t.The signal transacting
Unit utilizes filament saturation water vapor partial pressure table, corresponding saturation vapour partial pressure value is called according to temperature value, according to relative humidity
FormulaRelative humidity is calculated, in formulaFor relative humidity, PWSFor the saturation in atmospheric pressure at a certain temperature
Water vapor partial pressure power.
First, atmospheric condition parameter
Dalton's law points out that the gross pressure of hybrid atmospheric is equal to the partial pressure sum of each composition gas, such as formula (1) institute
Show：
PM=Pd+PW(Pa) (1)
P in formulaM(Pa) it is the gross pressure of mixed gas, Pd(Pa) it is the partial pressure of dry atmosphere, PW(Pa) it is institute in air
Containing water vapor partial pressure, wherein PWIn PMAccount for lion's share, only 5% or so, therefore PMAnd PdPressure relatively normal atmosphere
Pressure.
Relative humidity(RH%) formula is：
In formulaRepresent relative humidity, PWSFor atmospheric pressure at a certain temperature, saturation vapour partial pressure (Pa), it is with temperature
And become, it can be tabled look-up by known temperature or be tried to achieve by regression fit curvilinear equation.It can be obtained by formula (1), if can be surveyed by instrument
Go out differential pressure PM–Pd, you can calculate PW, then with measured temperature, looked in density of moist air, water vapour pressure, the water capacity table of comparisons
To PWS, relative humidity can be calculated by formula (2)(RH%).
2nd, foil gauge and its transfer characteristic
In sensor foil gauge scheme of installation as shown in Fig. 2 sensor structural representation as shown in figure 3, strain
The transfer characteristic and Strain Distribution of piece are as shown in Figure 4.Warm integrated level relative humidity baroceptor is integrally a cylindrical shape
Shell, shell include cup-shaped support 1 and brass diaphragm (brass diaphragm is diaphragm 3, and diaphragm uses brass material), brass diaphragm
It is covered in cup-shaped support 1, forms an aeroseal chamber 2 therebetween, two semiconductor gauges is arranged on brass diaphragm
On, the resistance variations by measuring semiconductor gauge are calculated in integrated type sensor (abbreviation integrated sensor) installation environment
Temperature, relative humidity and atmospheric pressure data.Analysis calculate temperature, relative humidity and two times transfer unit needed for atmospheric pressure,
Signal processing unit may be mounted on 3 on brass diaphragm, can also be arranged on the side of cup-shaped support, be passed by connection
Delivery signal.
Hybrid atmospheric presses PMStepless action is in the outer surface of flexible sheet, the then differential pressure of diaphragm both sides：
Δ P=PM–Pre=PW+Pd-Pre(Pa) (3)
P in formulare=4104(Pa) it is the reference pressure set in annular seal space, Pd=101325 (Pa) are normal atmosphere
Pressure, so as to calculate air reclaimed water partial pressure of vapor PW(Pa)
Under differential pressure Δ P effects, the distribution of membrane surface upper stress and strain is shown below：
Radial stress：
Radial strain：
More preferable from brass membrane flexive in the present invention in formula, E (Pa) is membrane flexive modulus, about 7*1010Pa, μ are about
It is Poisson's ratio for 0.33, r0For the outer radius 40 (mm) of diaphragm 3, h is the diaphragm thickness 0.1 (mm) of diaphragm 3, and b is cup-shaped support
Thickness 5 (mm), the height 10 (mm) of cup-shaped support, Δ P acts on the differential pressure (Pa) of diaphragm both sides, and r (mm) is point of observation
Radius.
If known constant is substituted into (4) formula, circumferential stress σ can be obtainedR=0=8*104*ΔP(Pa) (6)
The sensitivity coefficient K of foil gaugeεWith transfer characteristic such as formula (7) Suo Shi：
R in formula0For t=0 DEG C and εrSheet resistance (Ω), K are strained when=0εAbout 125, Δ RεThen for foil gauge in εrExcitation
The variable quantity (Ω) of lower resistance, (6) formula substitution (7) can be obtained：
If by E=7*1010Pa substitutes into formula and understood, the relative resistance change that foil gauge can be output, under maximum range
Only 10-2Magnitude, therefore quadratic transformation and signal processing circuit need to be added in a device, to obtain required sensitivity and resolution
Power.
3rd, quadratic transformation and signal transmission flow
Operation principle structured flowchart as shown in figure 5, integrated sensor include semiconductor detection unit, two times transfer unit,
Signal processing unit, two semiconductor gauges is provided with semiconductor detection unit, semiconductor gauge is become by piezoresistance
Change output resistance response, the output end connecting secondary converting unit of semiconductor detection unit, two times transfer unit receives semiconductor
Electrical response signal is converted to pulse width signal by the output signal of detection unit, two times transfer unit, two times transfer unit it is defeated
Go out end connection signal processing unit, the output signal of signal processing unit Decoupling Analysis two times transfer unit, signal processing unit
Microprocessor is connected, sends temperature, relative humidity and the atmospheric pressure of the mount point that signal processing unit calculates.
Signal flow block diagram is as shown in fig. 6, two times transfer unit includes two identical pulse signal change-over circuits, pulse
Signaling conversion circuit is made up of 555 timer C1 and C2, and two times transfer unit and signal processing unit are additionally provided with gating switch, choosing
Switched with C3, signal processing unit is mainly formed as C4 single-chip microcomputers.R in Fig. 6ε1And Rε2In PWUnder being encouraged with t, each produce different
R1And R2Response, they each produce τ after C1, C2 chip 555 of two identical pulse signal change-over circuits converts1With
τ2(S) pulsewidth exports, and the pulse width signal delivers to C4 single-chip microcomputers and carries out signal transacting again after C3 switching gates.Pulse signal is changed
For circuit as shown in fig. 7, resistance R is connected between No. 2 pins of C timers 555 and No. 3 pins, electric capacity C is connected to 555 timings
On No. 2 pins of device, No. 2 pins and No. 6 pin short circuits, No. 3 pins and No. 7 pin short circuits, No. 7 pins of 555 timers are defeated
Go out pulse width signal and be connected to signal processing unit.Due to the difference of foil gauge, resistance and output pulse width in two impulse circuits
R can be used1And R2、τ1And τ2Represent.
Pulse width conversion formula：τ=ln2CR (S) corresponds to two pulse signal change-over circuits：
τ1=ln2C0·R1(S) (9)
τ2=ln2C0·R2(S) (10)
τ in formula1And τ2For two-way pulsewidth output signal, R corresponding to two semiconductor gauges1And R2For semiconductor strain
The increased resistance value measurement unit of piece is Ω, C0(F) it is mica standard electric capacity, about 0.72 × 10-6F, above formula show that pulsewidth is defeated
Go out and respective institute connecting resistance R1And R2It is directly proportional.
4th, in multifactor input, the decoupling processing of response is synthesized
In τ1And τ2In be implied with water vapor partial pressure PWWith two kinds of information of temperature t, it how is allowed in follow-up Data processing
Separation, it need to realize information separation by data decoupler technology and restore.
R1And R2Resistance variations formula is：
R in formula0Resistance on the basis of=1000 Ω；B=4850 (K) is the resistance temperature coefficient of semiconductor gauge；T0=273 (K)
For reference temperature(TR)；T (K) is input temp；ΔRε1With Δ Rε2Respectively R1And R2It is each caused electric under atmospheric pressure excitation
Hinder increment.Two formulas more than, if allowing Δ Rε1With Δ Rε2Numerical value is identical, but positive and negative on the contrary, i.e. (11) and (12) formula is variable
Into：
Two formulas are subtracted each other or are added by more than, so that it may isolate PWWith two kinds of input information of t, that is, R1+R2=f when being addedt(T),
With R1-R2=f when subtracting each otherε(PW), i.e., and with the result of difference only corresponded with single input information, Δ Rε1=-Δ Rε2=Δ
Rε。
Referring to Fig. 3, whole diaphragm outer surface is under differential pressure Δ P effects, with radius r=0.63r0For boundary, divide into positive and negative
Two strain regions.By center of circle part inner circle Wei Zheng ε areas, and periphery excircle part then Wei Fu ε areas are leaned on, in the suitable of this two regions
On position, it can find that ε numerical value is equal but opposite polarity two points, one is in circle centre position, r1=0, and another point passes through (5) formula
It is calculated as r2=0.89r0Place.Two piece performance identical semiconductor gauges are configured on this 2 points, and are allowed on its center and diaphragm
Reference point overlaps, and is then achieved that the quantitative relationship of (13) and (14) formula.
(14) formula is added to obtain (13) formula
ε information has been eliminated in above formula to (R1+R2) quantitative interference, but R1And R2It is respectively coupled to 555 chips
In charge-discharge circuit, therefore can not be by R1And R2Directly it is added, now need to just passes through data operation and handle to realize.If allow pulsewidth
τ1And τ2To clock frequency f in single-chip microcomputer0Count, then have count value N1And N2For：
N1=τ1·f0 (16)
N2=τ2·f0 (17)
τ1+τ2=(N1+N2)/f0(S) (18)
Simultaneous above formula, and can be obtained by arrangement：
Celsius temperature：T=T-273 (DEG C) (20)
Each constant coefficient is in R in formula0=1000 Ω, C0=7.2*10-6F and f0Calculated under the conditions of=10MHZ.From R1With
R2Two times transfer information in isolate strain and steam partial pressure PWEtc. information, (13) formula is subtracted into (14) formula, can be obtained
R1-R2=2 Δs Rε=2R0Kε·ε(Ω) (21)
Recycle τ1-τ2=(N1-N2)/f0(5), the simultaneous such as (9), (10) formula, it is collated to obtain,
Δ P=10 (N1-N2)(Pa) (22)
Formula (19) and (22) are two kinds of input-output characteristic equations of sensor, have enough sensitivity and divide
Distinguish power.It is knownP in formulaWSCan by temperature t through tabling look-up or following regression equations calculate,
PWS=aEXP (bt) (Pa) (23)
A is 6.16 (Pa) in formula, and b is that 0.064 (1/ DEG C) is fitting constant, then
PWS=6.16EXP (0.064t) (Pa) (24)
Atmospheric pressure is not a definite value, is had differences with the difference of landing pit height above sea level, while also with season temperature
Degree changes and slight change, to PWCalculating can be described approx with following formula：
PW=Δ P+Pre-Bf(T)+h·8.76(Pa) (25)
H is local height above sea level (m) in formula, and coefficient 8.76 (Pa/m) is atmospheric pressure attenuation slope, and f (T) is temperature adjustmemt
Coefficient can pass through the matched curve of measured data of experiment and be estimated.Due to being in coastal area winter summer air pressure change ratio
1.02, and be only 1.0026 in Qinghai Area winter Charpy.Decline with temperature and be increased slightly.Therefore the small shadow of temperature ought not be considered
Ring, and at coastal area, (25) formula can be reduced to：
PW=Δ P+ (Pre- B)=10 (N1-N2)+(Pre-B)(Pa) (26)
One of theoretical foundation of this paper resolvings is that standard atmospheric pressure is constant, and actual atmospheric pressure is with local height above sea level
Degree and becomes, when device territory of use height above sea level and it is larger with reference to difference in height when, P in formula (3)dSchool should be given by software
Just, to maintain the data conversion precision of water vapor partial pressure power.So the present invention is provided with GPS unit and air in signal processing unit
Numerical tabular is pressed, GPS unit is connected to the longitude and latitude for being used for alignment sensor mount point on signal processing unit, inquires about mount point
Atmospheric pressure numerical value is the partial pressure of the dry air intracavitary in sensor, and the air reclaimed water that binding signal processing unit calculates is steamed
Qi leel pressure value, and then utilize formula (1)：PM=Pd+PW(Pa) pressure of the pressure value of hybrid atmospheric, i.e. mount point is calculated
Value.
So far, the numerical value of temperature, relative humidity and atmospheric pressure, which can calculate to solve, comes.Integrated form provided by the invention passes
Sensor has simple in construction, easy to implement.Obtained in the present invention through analytic method：In air steam partial pressure and sensitive resistance it
The difference of difference, i.e., the pulsewidth after quadratic transformation and its counting to frequency all the time, it is directly proportional, and atmospheric temperature then with sensitivity
The logarithm of the counting sum of element is inversely.The theoretical foundation of this paper resolvings is that physical atmosphere is constant, actual
Atmospheric pressure become with local height above sea level, when device territory of use height above sea level with it is larger with reference to difference in height when, should pass through
Software is corrected, to maintain the data conversion precision of water vapor partial pressure power.
The present invention is exemplarily described above in conjunction with accompanying drawing, it is clear that present invention specific implementation is not by aforesaid way
Limitation, as long as the improvement of the various unsubstantialities of inventive concept and technical scheme of the present invention progress is employed, or without changing
Enter and the design of the present invention and technical scheme are directly applied into other occasions, within protection scope of the present invention.This hair
Bright protection domain should be determined by the scope of protection defined in the claims.
Claims (7)
1. a kind of machine room's temperature and humidity regulation system, it is characterised in that machine room's temperature and humidity regulation system includes sense
Answer device, focus on device, air-conditioning, dehumidifier and humidifier, induction installation is arranged in machine room, and induction installation wirelessly connects
It is connected to and focuses on device, focuses on output end connection air-conditioning, dehumidifier and the humidifier of device, integrated pass is provided with induction installation
Sensor detection temperature and relative humidity, integrated type sensor include semiconductor detection unit, two times transfer unit, signal transacting list
Member and display, two semiconductor gauge R are provided with semiconductor detection unitε1And R (4)ε2(5) it is r installed in radius0Film
On piece, semiconductor gauge be pressurized change output resistance response, semiconductor detection unit output end connecting secondary conversion
Unit, two times transfer unit receive the output signal of semiconductor detection unit, and two times transfer unit changes electrical response signal
For pulse width signal, the output end connection signal processing unit of two times transfer unit, signal processing unit Decoupling Analysis two times transfer
The output signal of unit, signal processing unit connection focus on device；Induction installation also includes wireless communication unit, induction installation
Processor is concentrated by wireless communication unit wireless connection, induction installation and wireless transmission of signals between device is focused on and refers to
Order；In semiconductor detection unit, a semiconductor gauge is arranged on home position, another semiconductor gauge be arranged on
Centered on the diaphragm center of circle, radius 0.89r0Concentric circles position on.
2. machine room's temperature and humidity regulation system according to claim 1, it is characterised in that the induction installation also includes
Microprocessor and warning lamp, integrated type sensor are connected on the input of microprocessor, the real-time detection of integrated type sensor
Data are sent to microprocessor, and warning lamp is connected to the output end of microprocessor.
3. machine room's temperature and humidity regulation system according to claim 1, it is characterised in that described focus in device sets
There are analytic unit, instruction execution unit and man-machine interaction unit, analytic unit link order execution unit, man-machine interaction unit connects
Connect analytic unit, instruction execution unit connection air-conditioning, dehumidifier and humidifier.
4. machine room's temperature and humidity regulation system according to claim 1, it is characterised in that the two times transfer unit bag
Include two identical pulse signal change-over circuits, semiconductor gauge one pulse signal change-over circuit of corresponding connection, arteries and veins
Rushing signaling conversion circuit includes 555 timers, resistance R and electric capacity C, and resistance R is connected to No. 2 pins of 555 timers and No. 3 are drawn
Between pin, electric capacity C is connected on No. 2 pins of 555 timers, No. 2 pins and No. 6 pin short circuits, No. 3 pins and No. 7 pins
Short circuit, No. 7 pin output pulse width signals of 555 timers to signal processing unit.
5. machine room's temperature and humidity regulation system according to claim 1, it is characterised in that the diaphragm is according to semiconductor
The strain variation of two semiconductor gauges in detection unit is divided into normal strain section and negative strain section, with radius 0.63r0
Concentric circles be boundary.
6. machine room's temperature and humidity regulation system according to claim 1, it is characterised in that in the signal processing unit
Provided with filament saturation water vapor partial pressure table, signal processing unit calls corresponding saturation vapour partial pressure value using temperature value.
7. machine room's temperature and humidity regulation system according to claim 1, it is characterised in that the integrated type sensor is set
Put in the cup-shaped support (1) of cylinder, diaphragm (3) is arranged on the upper surface of cup-shaped support (1), and diaphragm (3) selects brass film
Piece, is provided with aeroseal chamber (2) between cup-shaped support (1) and brass diaphragm, two semiconductor gauges (4 and 5) are arranged on Huang
The surface of copper film piece.
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| CN201610169505.XA CN105786057B (en) | 2016-03-21 | 2016-03-21 | Machine room's temperature and humidity regulation system |
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| CN201610169505.XA CN105786057B (en) | 2016-03-21 | 2016-03-21 | Machine room's temperature and humidity regulation system |
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| CN105786057A CN105786057A (en) | 2016-07-20 |
| CN105786057B true CN105786057B (en) | 2018-01-12 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111966057A (en) * | 2020-07-20 | 2020-11-20 | 临沂市鲁蒙水表制造有限公司 | Intelligent workshop monitoring system for factory for water meter accessory processing |
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| CN201741047U (en) * | 2010-07-17 | 2011-02-09 | 厦门正兴宏业印刷有限公司 | Temperature control device of printer ovens |
| CN201984356U (en) * | 2010-12-16 | 2011-09-21 | 陕西科技大学 | Automatic control device of humidity in printing workshop |
| CN203267457U (en) * | 2013-05-30 | 2013-11-06 | 浙江南洋科技股份有限公司 | Automatic control device for printing coating drying oven |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2184576B1 (en) * | 2007-08-27 | 2019-05-15 | Hitachi, Ltd. | Semiconductor strain sensor |
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2016
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|---|---|---|---|---|
| CN201741047U (en) * | 2010-07-17 | 2011-02-09 | 厦门正兴宏业印刷有限公司 | Temperature control device of printer ovens |
| CN201984356U (en) * | 2010-12-16 | 2011-09-21 | 陕西科技大学 | Automatic control device of humidity in printing workshop |
| CN203267457U (en) * | 2013-05-30 | 2013-11-06 | 浙江南洋科技股份有限公司 | Automatic control device for printing coating drying oven |
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Effective date of registration: 20181229 Address after: 311300 Lingxi Village, Banqiao Town, Linan District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Yun Jia Decoration Materials Co., Ltd. Address before: 241000 No. 8 Beijing Middle Road, Jiujiang District, Wuhu City, Anhui Province Patentee before: Anhui Polytechnic University |