CN107066016A - A kind of temperature control voltage adjusting circuit - Google Patents
A kind of temperature control voltage adjusting circuit Download PDFInfo
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- CN107066016A CN107066016A CN201710379195.9A CN201710379195A CN107066016A CN 107066016 A CN107066016 A CN 107066016A CN 201710379195 A CN201710379195 A CN 201710379195A CN 107066016 A CN107066016 A CN 107066016A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
- G05F1/567—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for temperature compensation
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Abstract
The invention discloses a kind of temperature control voltage adjusting circuit, including the first temperature measurement circuit, second temperature measurement circuit, first analog comparator circuit, analog switching circuit, instrument discharge circuit, second analog comparator circuit, power input controls circuit, power-switching circuit and subtraction circuit, it is different according to the temperature of the detection of the first temperature measurement circuit and the second temperature measurement circuit, the voltage of generation is different, voltage difference input instrument discharge circuit caused by the temperature difference is amplified, the target voltage and instrument amplification voltage of power-switching circuit output obtain feedback voltage through subtraction circuit, power-switching circuit adjusts the target voltage of output by the feedback voltage, the target voltage is used to adjust temperature equipment, adjust the temperature of the first space or second space.The temperature control voltage adjusting circuit that the inventive embodiments are provided, circuit structure is simple, and stability and reliability are high, and the electric current increase of output strengthens its driving force, and the ripple of output voltage is small, improves regulating circuit operating efficiency.
Description
Technical field
The present invention relates to voltage control technology field, and in particular to a kind of temperature control voltage adjusting circuit.
Background technology
In terms of precision instrument measurement, many high-precision electronic measuring instruments are required for working at a constant temperature.Temperature control
Precision govern in the measurement accuracy of instrument, temperature control system, gradual control is typically all taken, using interior temperature control and outer temperature control two
Individual controlling unit is controlled the accurate of measuring instrument operating temperature to realize.
A kind of temperature control voltage adjusting circuit, including the first thermometric electricity are for example disclosed in Chinese patent literature CN106502299A
Road, the second temperature measurement circuit, the first analog comparator, analog switching circuit, instrument discharge circuit, the second analog comparator and
High pressure discharge circuit, different according to the measurement temperature of the first temperature measurement circuit and the second temperature measurement circuit, the voltage of generation is different, so that
By the first analog comparator and analog switching circuit, voltage difference input instrument discharge circuit caused by the temperature difference is put
Greatly, by the voltage after amplification compared with the reference voltage of the second analog comparator, when difference is more than reference voltage, then cause
High pressure discharge circuit works, the voltage after output amplification, for adjusting temperature equipment so that the first temperature and second temperature tend to
Unanimously.The program controls the temperature in outer temperature control box body to be exchanged with environment temperature by voltage difference, so as to reach the balance temperature difference
Effect, circuit is fairly simple, and the stability and Reliability comparotive of circuit are high.But after the signal difference amplification for passing through sensor directly
High pressure amplifier is driven to realize pressure regulation, this method is although feasible, but there is also following weak point：
Current high pressure amplifier is all linear amplifier, and output current is small, and load capacity is not strong, therefore the temperature control in documents
Regulating circuit implementation method, the electric current that it is exported is small；Simultaneously as high pressure amplifier has been used so circuit caloric value is big, circuit work
The heat that itself is produced when making also influences whether the data of temperature sensor, causes regulating circuit operating efficiency low.
The content of the invention
In view of this, the embodiments of the invention provide a kind of temperature control voltage adjusting circuit, adjusted with solving temperature control of the prior art
Volt circuit output current is small, and caloric value is big, the problem of efficiency is low.
Therefore, the embodiments of the invention provide following technical scheme：
The embodiments of the invention provide a kind of temperature control voltage adjusting circuit, including the first temperature measurement circuit, for measuring the first space
The first temperature, according to first temperature export first voltage；Second temperature measurement circuit, the second temperature for measuring second space
Degree, second voltage is exported according to the second temperature；First analog comparator circuit, two input inputs described respectively
One voltage and the second voltage, by the relatively first voltage and the second voltage, its output end output first is controlled
Signal；Analog switching circuit, its control end inputs first control signal, and two input inputs first electricity respectively
Pressure and the second voltage, two output end export the first differential voltage and second poor respectively according to first control signal
Component voltage；Instrument discharge circuit, its first input end inputs first differential voltage, its second input input described second
Differential voltage, its output end output meter amplification voltage；Second analog comparator circuit, its input inputs the instrument amplification
Voltage, instrument amplification voltage is compared with reference voltage, the second control signal is exported according to comparative result；Power input control
Circuit processed, its control end inputs second control signal, and plant-grid connection or disconnection are controlled according to second control signal；Electricity
Power-switching circuit, its power input accesses the voltage of the power input control circuit output, its output end output target electricity
Pressure, the power-switching circuit also includes a voltage adjusting end, the target that the signal adjustment output end inputted according to voltage adjusting end is exported
Voltage；Subtraction circuit, two input inputs the instrument amplification voltage and the target voltage respectively, by the mesh
Mark voltage and instrument amplification voltage do subtraction output feedback voltage, and the feedback voltage is fed back into the power supply
The voltage adjusting end of change-over circuit, the power-switching circuit is adjusted according to the feedback voltage to the target voltage of output.
Alternatively, the operation element of the power-switching circuit is DC-DC power source conversion device.
Alternatively, in second analog comparator circuit, when instrument amplification voltage is more than the reference voltage
When, second control signal is high level；When instrument amplification voltage is less than the reference voltage, second control
Signal is low level.
Alternatively, in power input control circuit, when second control signal is high level, the power supply
Input control circuit is closed；When second control signal is low level, the power input control circuit disconnects.
Alternatively, the power input control circuit includes gate-controlled switch.
Alternatively, the temperature control voltage adjusting circuit also includes：First voltage follows circuit, and the first voltage is through described first
First analog comparator circuit and the analog switching circuit are inputted after voltage follower circuit processing.
Alternatively, the temperature control voltage adjusting circuit also includes：Second voltage follows circuit, and the second voltage is through described second
Second analog comparator circuit and the analog switching circuit are inputted after voltage follower circuit processing.
Alternatively, the temperature control voltage adjusting circuit also includes：Tertiary voltage follows circuit, and the instrument amplification voltage is through described
Tertiary voltage, which is followed, inputs the subtraction circuit after processing of circuit.
Alternatively, the temperature control voltage adjusting circuit also includes：Pressure limiting circuit, the instrument amplification voltage inputs institute after pressure limiting
State the second analog comparator circuit and the tertiary voltage follows circuit.
Alternatively, in the analog switching circuit, when the first voltage is more than the second voltage, first control
Signal processed controls the first voltage to be first differential voltage, and the second voltage is second differential voltage；Work as institute
When stating first voltage less than the second voltage, first control signal controls the second voltage to be first differential electrical
Pressure, the first voltage is second differential voltage.
Alternatively, the difference of first temperature and the second temperature, first differential voltage and described second poor
The difference of component voltage, linearly increases or linearly reduces.
Alternatively, the output end connection temperature equipment of the power-switching circuit, the temperature equipment is used to adjust described
First space or the temperature of the second space.
Technical scheme of the embodiment of the present invention, has the following advantages that：
The embodiments of the invention provide a kind of temperature control voltage adjusting circuit, including the first temperature measurement circuit, the second temperature measurement circuit, first
Analog comparator circuit, analog switching circuit, instrument discharge circuit, the second analog comparator circuit, power input control circuit,
Power-switching circuit and subtraction circuit, it is different according to the measurement temperature of the first temperature measurement circuit and the second temperature measurement circuit, produce
Voltage it is different, so that by the first analog comparator circuit and analog switching circuit, voltage difference caused by the temperature difference is inputted into instrument
Table discharge circuit is amplified, by the voltage after amplification compared with the reference voltage of the second analog comparator circuit, when difference is big
When reference voltage, then cause power input control closing of circuit, its voltage exported exports target by power-switching circuit
Voltage after voltage, the target voltage and the amplification of instrument discharge circuit is by subtraction circuit formation feedback voltage, and power supply turns
The target voltage that circuit adjusts output by the feedback voltage is changed, the target voltage after the adjustment is used to adjust temperature equipment, adjusts
Save the temperature of the first space or second space.The temperature control voltage adjusting circuit that the inventive embodiments are provided, circuit structure is simple, stability
High with reliability, the electric current increase of output strengthens its driving force, and the ripple of output voltage is small, improves the work of regulating circuit
Make efficiency.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a circuit structure diagram of temperature control voltage adjusting circuit according to embodiments of the present invention；
Fig. 2 is another circuit structure diagram of temperature control voltage adjusting circuit according to embodiments of the present invention.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify description, rather than indicate or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, can be with
It is the connection of two element internals, can is wireless connection or wired connection.For one of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
As long as in addition, technical characteristic involved in invention described below different embodiments non-structure each other
It can just be combined with each other into conflict.
Embodiment 1
The embodiments of the invention provide a kind of temperature control voltage adjusting circuit, temperature and second space for adjusting the first space
Temperature, such as when measuring precision instrument, many high-precision electronic measuring instruments will work at a constant temperature, generally use
Interior space temperature is controlled and exterior space temperature controls two links to realize the precision control to measuring instrument operating temperature,
Temperature control voltage adjusting circuit provided in an embodiment of the present invention, the temperature for adjusting the first space and second space realizes accurate control,
Improve regulating circuit operating efficiency.
Fig. 1 is a circuit structure diagram of temperature control voltage adjusting circuit according to embodiments of the present invention, as shown in figure 1, the temperature control
Regulating circuit includes the first temperature measurement circuit 01, the second temperature measurement circuit 02, the first analog comparator circuit 03, analog switching circuit
04th, instrument discharge circuit 05, the second analog comparator circuit 06, power input control circuit 07, power-switching circuit 08, subtraction
Computing circuit 09, wherein：
First temperature measurement circuit 01, the first temperature for measuring the first space exports first voltage according to the first temperature, the
Two temperature measurement circuits 02, the second temperature for measuring second space exports second voltage, specifically, first according to second temperature
Space can be inner space, and second space can be outport space, in another embodiment, and the first space can be with
It is exterior space, second space can be inner space, and the first temperature can be less than second temperature, can also be more than the second temperature
Degree.The first temperature measurement circuit 01 or the second temperature measurement circuit 02 herein can be realized by thermistor or temperature sensor, real
Existing conversion between temperature signal and voltage signal.
First analog comparator circuit 03, two input inputs above-mentioned first voltage and second voltage, passed through respectively
Compare above-mentioned first voltage and second voltage, its output end exports the first control signal.Specifically, first analog comparator electricity
Road 03 includes a comparator, compares the first voltage and second voltage of input, if first voltage is more than second voltage,
First control signal of output is high level, if first voltage is less than second voltage, the first control signal exported is low
Level, is then sent to analog switching circuit 04 by this first control signal.
Analog switching circuit 04, its control end inputs above-mentioned first control signal, and two input inputs above-mentioned respectively
First voltage and second voltage, two output end export the first differential voltage and the second difference respectively according to the first control signal
Voltage.Analog switching circuit has two output ends, and its effect is to fix voltage larger in first voltage and second voltage
In the output of output end, and output end connection is the input that larger voltage signal is inputted in instrument discharge circuit 05,
It so just can guarantee that the difference one of two voltage signals inputted in instrument discharge circuit 05 is set on the occasion of will not be because of difference
Negative value and damage its internal components.
Specifically, in analog switching circuit, when first voltage is more than second voltage, the first control signal is high electricity
Flat, it is the first differential voltage that the first output end is exported to control first voltage, and second voltage is second that the second output end is exported
Differential voltage；When first voltage is less than second voltage, the first control signal is low level, and it is the first output to control second voltage
The first differential voltage of output is held, first voltage is the second differential voltage that the second output end is exported.So no matter first voltage
With the height of second voltage, the first differential voltage of the first output end output is all higher voltage among the two, the second output
Second differential voltage of end output is all relatively low voltage among the two.Wherein, the difference of the first temperature and second temperature, first
The difference of differential voltage and the second differential voltage, linearly increases or reduces, so by monitoring the first differential voltage and second
The difference of differential voltage can just reflect the temperature gap of the first space and second space.
Instrument discharge circuit 05, its first input end inputs above-mentioned first differential voltage, and the input of its second input is above-mentioned
Second differential voltage, its output end output meter amplification voltage.Due to the effect of analog switching circuit 04, no matter first voltage is
No to be more than second voltage, the first differential voltage is always among the two than larger voltage, therefore the first differential voltage is more than second
Difference between differential voltage, therefore first input end and second input is always remained as on the occasion of so that instrument amplifier
Circuit 05 can be with normal work, and the difference of first differential voltage and the second differential voltage is after the amplification of instrument discharge circuit 05
Voltage is amplified by its output end output meter.
Second analog comparator circuit 06, its input inputs instrument amplification voltage, and the instrument is amplified into voltage and base
Quasi- voltage ratio is compared with according to comparative result the second control signal of output.Reference voltage is a magnitude of voltage pre-set, this implementation
Voltage on the basis of 1.5V can be selected in example, when instrument amplification voltage is more than 1.5V, the second control signal is high level, power supply
Input control circuit 07 works；When instrument amplification voltage is less than or equal to 1.5V, the second control signal of output is low level,
Power input control circuit 07 does not work.In other embodiments, reference voltage can rationally be set, and be traditionally arranged to be 1-
2V。
Power input controls circuit 07, and its control end inputs the second control signal, and power supply is controlled according to the second control signal
It is switched in or out.Specifically, the power input control circuit 07 include gate-controlled switch, the gate-controlled switch can be triode or
Metal-oxide-semiconductor, when the second control signal that its control end is inputted is high level, gate-controlled switch controls the power input to control circuit to close
Close, when the second control signal is low level, gate-controlled switch controls the power input to control circuit to disconnect, so as to realize that temperature control is adjusted
The closed and disconnected of volt circuit.
Power-switching circuit 08, the voltage that its power input access power input control circuit 07 is exported, its output end
Target voltage is exported, power-switching circuit also includes a voltage adjusting end, the signal adjustment output end output inputted according to voltage adjusting end
Target voltage.The effect of power-switching circuit 08 is will to input its voltage to export after decompression is handled, and this is exported
Voltage is sent to an input of subtraction circuit 09, another input input instrument amplification of subtraction circuit 09
The voltage that two inputs are inputted is done and feedback voltage is exported after subtraction by voltage, subtraction circuit 09, and is sent to
To the voltage adjusting end of power-switching circuit 08, power-switching circuit 08 adjusts the target voltage of output according to the feedback voltage, makes it
It is eventually held in a voltage range, the target voltage is used for the power for adjusting temperature equipment, adjusts the first space or second
The temperature in space, makes the first temperature and second temperature reach unanimity.In the present embodiment, the target voltage ranges are 6-12V, electricity
The operation element of power-switching circuit is DC-DC power source conversion device, and specific chip model is LMR14050.In other embodiment
In, the buck converter of other models can be used, specific target voltage adjusting range can also be according to actual use situation
Set.
Subtraction circuit 09, two input inputs instrument amplification voltage and target voltage respectively, by target voltage
Subtraction output feedback voltage is done with instrument amplification voltage, and the feedback voltage is fed back to the pressure regulation of power-switching circuit 08
End, power-switching circuit 08 is adjusted according to feedback voltage to the target voltage of output.Due to instrument amplification voltage be with
The temperature difference of first space and second space changes and changed, therefore the feedback voltage also can be with the first space and second space
Temperature difference change and change, decompression of feedback voltage that power-switching circuit 08 is gone out by the subtraction realization to target voltage
With pressure regulation processing, target voltage adjusts voltage as power, can adjust the power of temperature equipment, temperature equipment is to the first space
Or the temperature of second space is adjusted so that the difference between the first temperature and second temperature reduces, until reaching unanimity.This
The temperature equipment at place can be provided in the fan between the first space and second space, and the rotating speed of fan is controlled by voltage,
The rotating speed of the temperature difference more big fan is faster so that the temperature difference of the first space and second space reduces.Temperature control voltage adjusting of the prior art
Circuit, the voltage of adjustment temperature equipment is realized by high pressure height stream amplifier is directly inputted after the signal difference amplification of sensor, due to
Current high pressure height stream amplifier is all linear amplifier, and the electric current of output is smaller, and only 500mA, load capacity is not strong, and because uses
High pressure height stream amplifier is so cause circuit caloric value big, inefficiency, therefore regulation temperature is slow, it is impossible in time by first
Space is consistent with the temperature adjustment of second space；And in the present embodiment, by power-switching circuit 08 according to subtraction electricity
The feedback voltage that road 09 is exported is adjusted to the target voltage of output, and the output current of power-switching circuit can reach 5A, from
And substantially increase current output capability, bearing power is significantly improved, thus can in time to the first space temperature and second
The temperature in space is adjusted, and it is reached unanimity.
In order to reduce the impedance in temperature control voltage adjusting circuit, as shown in Fig. 2 in one alternate embodiment, temperature control voltage adjusting electricity
Road also follows circuit, second voltage to follow circuit and tertiary voltage to follow circuit including first voltage.Specifically, first voltage is passed through
First voltage inputs the first analog comparator circuit 03 and analog switching circuit 04 after following processing of circuit, and second voltage is through
The first analog comparator circuit 03 and analog switching circuit 04, instrument amplification voltage warp are inputted after the processing of two voltage follower circuits
Tertiary voltage, which is followed, inputs subtraction circuit 09 after processing of circuit.The operation element of voltage follower circuit is voltage follower,
The input voltage of voltage follower and output voltage are identicals, i.e. the voltage amplification factor perseverance of voltage follower is less than and approached
In 1, the advantage of voltage follower is input impedance height and output impedance is low, and in general, input impedance can reach several megaohms
Nurse, and output impedance generally only has several ohm, it is even lower, therefore reduce using voltage follower the impedance in circuit.
The temperature control voltage adjusting circuit also includes pressure limiting circuit, as shown in Fig. 2 the instrument amplification electricity that magnifier 05 is exported
The second analog comparator circuit 06 is inputted after pressure limiting circuit pressure limiting for pressure and tertiary voltage follows circuit.In the present embodiment, pressure limiting
The voltage limiting value of circuit is 3V, and it is in order to avoid due to input the second analog comparator electricity that pressure limiting is carried out to instrument amplification voltage herein
The voltage on road 06 is excessive and damages its component, while making feedback electricity in order to avoid the voltage for inputting subtraction circuit is excessive
Existing negative value is extruded, influence DCDC power-switching circuits 08 are adjusted according to feedback voltage to the target voltage of output.
In concrete implementation mode, the system power supply input of temperature control voltage adjusting circuit is DC28V, passes through power voltage step down chip
It is adjusted to DC5V to power for the device in whole temperature control voltage adjusting circuit, DC28V directly powers for power input control circuit 07, such as
Shown in Fig. 2.It is generally integrated chip additionally, due to comparator of the prior art, is provided with one or more comparator electricity
The first analog comparator 03 and the second analog comparator 06 in road, therefore the embodiment above can be compared by one
Device chip IC realizes that the comparator chip internal is at least integrated with two comparator circuits.
Temperature control voltage adjusting circuit in the embodiment of the present invention, specific workflow is：First temperature measurement circuit 01 is used to detect
Temperature in confined space, the second temperature measurement circuit is used to detect the environment temperature outside temperature control box, and two temperature measurement circuits are exported respectively
First voltage and second voltage, first voltage equivalent simulation of input first after first voltage follows circuit to reduce impedance are compared
Device circuit 03 and analog switching circuit 04, second voltage first mould of equivalent input after second voltage follows circuit to reduce impedance
Intend comparator circuit 03 and analog switching circuit 04, the first control signal major control of the first analog comparator circuit 03 output
Analog switching circuit 04 export voltage forever be on the occasion of.When the reference temperature outside the temperature and confined space in confined space is poor
Value is at 3 DEG C, and the first differential voltage and the pressure difference of the second differential voltage that analog switching circuit 04 is exported are 0.0091V, with
The linear increase of reference temperature difference outside the temperature and confined space in confined space, the first differential voltage and the second differential voltage
Pressure difference linearly increase or linearly reduce also with the change of temperature difference, when temperature difference be 15 DEG C when, the first differential voltage
Pressure difference with the second differential voltage is 0.00271V.This voltage amplifies 164.8 times through instrument discharge circuit 05, obtains instrument and puts
Big voltage, the multiplication factor of instrument discharge circuit 05 can also be set as needed, be typically chosen 80-200 times or so.The instrument
Table amplifies control source pressure limiting circuit, and it is maximum to 3V is defined to, and tertiary voltage follows circuit equivalent output after pressure limiting
Instrument amplification voltage (generally 1.5-3V), the instrument amplification voltage after pressure limiting also inputs the second analog comparator circuit 06
In, the reference voltage of the second analog comparator circuit 06 is set to 1.5V, when the instrument amplification voltage after pressure limiting is more than 1.5V, the
Two analog comparator circuits 06 export high level signal, now power input control circuit 07 enable, DCDC Power converts it is defeated
Enter end to be powered, DCDC starts working.When the instrument amplification voltage after pressure limiting is less than 1.5V, the second analog comparator circuit 06 is defeated
Go out low level signal, now the input power-off of DCDC Power converts, DCDC is stopped.DCDC power-switching circuits 08 are exported
Voltage and tertiary voltage follow the voltage of circuit output to do subtraction in subtraction circuit 09 to obtain feedback voltage, instead
Feedthrough voltage is input to the FB pin of DCDC power-switching circuits 08, i.e., the voltage adjusting end of above-mentioned power-switching circuit turns DCDC power supplys
The target voltage of the adjustment output of circuit 08 is changed between 6-12V, the size of this voltage is defeated with current temperature gap change
The electric current gone out can reach 5A.
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in the protection domain of the invention.
Claims (12)
1. a kind of temperature control voltage adjusting circuit, including：First temperature measurement circuit, the first temperature for measuring the first space, according to described
First temperature exports first voltage；
Second temperature measurement circuit, the second temperature for measuring second space exports second voltage according to the second temperature；
First analog comparator circuit, two input inputs the first voltage and the second voltage respectively, by than
The first voltage and the second voltage, its output end export the first control signal；
Analog switching circuit, its control end inputs first control signal, and two input inputs first electricity respectively
Pressure and the second voltage, two output end export the first differential voltage and second poor respectively according to first control signal
Component voltage；
Instrument discharge circuit, its first input end inputs first differential voltage, and its second input input described second is poor
Component voltage, its output end output meter amplification voltage；
Second analog comparator circuit, its input inputs the instrument amplification voltage, and the instrument is amplified into voltage and benchmark
Voltage ratio is compared with according to comparative result the second control signal of output；
Characterized in that, also including：
Power input controls circuit, and its control end inputs second control signal, and electricity is controlled according to second control signal
Source is switched in or out；
Power-switching circuit, its power input accesses the voltage of the power input control circuit output, the output of its output end
Target voltage, the power-switching circuit also includes a voltage adjusting end, the signal adjustment output end output inputted according to voltage adjusting end
Target voltage；
Subtraction circuit, two input inputs the instrument amplification voltage and the target voltage respectively, by the mesh
Mark voltage and instrument amplification voltage do subtraction output feedback voltage, and the feedback voltage is fed back into the power supply
The voltage adjusting end of change-over circuit, the power-switching circuit is adjusted according to the feedback voltage to the target voltage of output.
2. temperature control voltage adjusting circuit according to claim 1, it is characterised in that the operation element of the power-switching circuit is
DC-DC power source conversion device.
3. temperature control voltage adjusting circuit according to claim 1 or 2, it is characterised in that in second analog comparator circuit
In, when instrument amplification voltage is more than the reference voltage, second control signal is high level；When the instrument is put
When big voltage is less than the reference voltage, second control signal is low level.
4. temperature control voltage adjusting circuit according to claim 3, it is characterised in that in power input control circuit, when
When second control signal is high level, the power input controls closing of circuit；When second control signal is low electricity
Usually, the power input control circuit disconnects.
5. temperature control voltage adjusting circuit according to claim 1, it is characterised in that the power input control circuit includes controllable
Switch.
6. temperature control voltage adjusting circuit according to claim 1, it is characterised in that also include：First voltage follows circuit, described
First voltage is followed through the first voltage inputs first analog comparator circuit after processing of circuit and the simulation is opened
Powered-down road.
7. temperature control voltage adjusting circuit according to claim 1, it is characterised in that also include：Second voltage follows circuit, described
Second voltage is followed through the second voltage inputs second analog comparator circuit after processing of circuit and the simulation is opened
Powered-down road.
8. temperature control voltage adjusting circuit according to claim 1, it is characterised in that also include：Tertiary voltage follows circuit, described
Instrument amplification voltage inputs the subtraction circuit after following processing of circuit through the tertiary voltage.
9. temperature control voltage adjusting circuit according to claim 8, it is characterised in that also include：Pressure limiting circuit, the instrument amplification
Voltage inputs second analog comparator circuit after pressure limiting and the tertiary voltage follows circuit.
10. temperature control voltage adjusting circuit according to claim 1, it is characterised in that in the analog switching circuit, when described
When one voltage is more than the second voltage, first control signal controls the first voltage to be first differential voltage,
The second voltage is second differential voltage；When the first voltage is less than the second voltage, first control
Signal controls the second voltage to be first differential voltage, and the first voltage is second differential voltage.
11. temperature control voltage adjusting circuit according to claim 1, it is characterised in that first temperature and the second temperature
Difference, the difference of first differential voltage and second differential voltage, linearly increase or linearly reduce.
12. the temperature control voltage adjusting circuit according to any one of claim 1 to 11, it is characterised in that the Power convert electricity
The output end connection temperature equipment on road, the temperature equipment is used for the temperature for adjusting first space or the second space.
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| CN201710379195.9A CN107066016B (en) | 2017-05-25 | 2017-05-25 | A kind of temperature control voltage adjusting circuit |
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| CN201710379195.9A CN107066016B (en) | 2017-05-25 | 2017-05-25 | A kind of temperature control voltage adjusting circuit |
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| CN107066016B CN107066016B (en) | 2018-08-24 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN112540634A (en) * | 2019-09-20 | 2021-03-23 | 触景无限科技（北京）有限公司 | Heating system for low-temperature heating of electronic equipment and electronic equipment thereof |
| CN113613473A (en) * | 2021-08-13 | 2021-11-05 | 宁波视睿迪光电有限公司 | Convection circulation control method and device, convection circulation controller and storage medium |
| CN115494900A (en) * | 2022-09-22 | 2022-12-20 | 上海概伦电子股份有限公司 | Reference voltage extension method, system, device, and computer-readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107390744A (en) * | 2017-08-22 | 2017-11-24 | 华通信安(北京)科技发展有限公司 | A kind of temperature control power amplification circuit |
| CN112540634A (en) * | 2019-09-20 | 2021-03-23 | 触景无限科技（北京）有限公司 | Heating system for low-temperature heating of electronic equipment and electronic equipment thereof |
| CN113613473A (en) * | 2021-08-13 | 2021-11-05 | 宁波视睿迪光电有限公司 | Convection circulation control method and device, convection circulation controller and storage medium |
| CN115494900A (en) * | 2022-09-22 | 2022-12-20 | 上海概伦电子股份有限公司 | Reference voltage extension method, system, device, and computer-readable storage medium |
| CN115494900B (en) * | 2022-09-22 | 2024-02-06 | 上海概伦电子股份有限公司 | Reference voltage expansion method, system, apparatus, and computer-readable storage medium |
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| CN107066016B (en) | 2018-08-24 |
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