CN107066016B - A kind of temperature control voltage adjusting circuit - Google Patents
A kind of temperature control voltage adjusting circuit Download PDFInfo
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- CN107066016B CN107066016B CN201710379195.9A CN201710379195A CN107066016B CN 107066016 B CN107066016 B CN 107066016B CN 201710379195 A CN201710379195 A CN 201710379195A CN 107066016 B CN107066016 B CN 107066016B
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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 circuits, including the first temperature measurement circuit, second temperature measurement circuit, first analog comparator circuit, analog switching circuit, instrument operational amplifier circuit, second analog comparator circuit, power input control 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 operational amplifier 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, the target voltage that power-switching circuit passes through feedback voltage adjustment output, the target voltage is for adjusting temperature equipment, adjust the temperature of the first space or second space.The temperature control voltage adjusting circuit that the inventive embodiments provide, circuit structure is simple, and stability and reliability are high, and the electric current increase of output makes its driving capability enhance, and the ripple of output voltage is small, improves regulating circuit working efficiency.
Description
Technical field
The present invention relates to voltage control technology fields, 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 restrict the measurement accuracy of instrument, in temperature control system, gradual control is generally all taken, using interior temperature control and outer temperature control two
A controlling unit controls the accurate of measuring instrument operating temperature to realize.
Such as a kind of temperature control voltage adjusting circuit is disclosed in Chinese patent literature CN106502299A, including the first thermometric electricity
Road, the second temperature measurement circuit, the first analog comparator, analog switching circuit, instrument operational amplifier circuit, the second analog comparator and
High pressure operational amplifier circuit, according to the measuring temperature of the first temperature measurement circuit and the second temperature measurement circuit difference, the voltage of generation is different, to
By the first analog comparator and analog switching circuit, voltage difference input instrument operational amplifier circuit caused by the temperature difference is put
Greatly, by amplified voltage compared with the reference voltage of the second analog comparator, when difference is more than reference voltage, then make
High pressure operational amplifier circuit works, and exports amplified voltage, for adjusting temperature equipment the first temperature and second temperature is tended to
Unanimously.The program controls the temperature in outer temperature control box body by voltage difference and is exchanged with environment temperature, to reach the balance temperature difference
Effect, circuit is fairly simple, and the stability and Reliability comparotive of circuit are high.But after being amplified by the signal difference of sensor directly
High pressure amplifier is driven to realize pressure regulation, this method is although feasible, but there is also following shortcomings：
High pressure amplifier is all linear amplifier at present, and output current is small, and load capacity is not strong, therefore the temperature control in documents
The electric current of regulating circuit implementation method, output is small；Simultaneously as used high pressure amplifier so circuit calorific value is big, circuit work
The heat that itself is generated when making also influences whether the data of temperature sensor, causes regulating circuit working efficiency low.
Invention content
In view of this, an embodiment of the present invention provides a kind of temperature control voltage adjusting circuit, to solve temperature control tune in the prior art
Volt circuit output current is small, and calorific value is big, the low problem of efficiency.
For this purpose, an embodiment of the present invention provides following technical solutions：
An embodiment of the present invention provides a kind of temperature control voltage adjusting circuits, 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 exports second voltage according to the second temperature；First analog comparator circuit, two input terminal input described respectively
One voltage and the second voltage, by comparing the first voltage and the second voltage, the first control of output end output
Signal；Analog switching circuit, control terminal input the first control signal, two input terminal inputs first electricity respectively
Pressure and the second voltage, two output end export the first differential voltage and second poor respectively according to the first control signal
Component voltage；Instrument operational amplifier circuit, first input end input first differential voltage, the second input terminal input described second
Differential voltage, output end output meter amplify voltage；Second analog comparator circuit, input terminal input the instrument amplification
The instrument is amplified voltage compared with reference voltage, second control signal is exported according to comparison result by voltage；Power input control
Circuit processed, control terminal input the second control signal, and plant-grid connection or disconnection are controlled according to the second control signal；Electricity
Power-switching circuit, power input access the voltage of the power input control circuit output, and output end exports target electricity
Pressure, the power-switching circuit further includes a voltage adjusting end, according to the target of the signal adjustment output end output of voltage adjusting end input
Voltage；Subtraction circuit, two input terminal 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 to the power supply
The voltage adjusting end of conversion circuit, the power-switching circuit are adjusted the target voltage of output according to the feedback voltage.
Optionally, the operation element of the power-switching circuit is DC-DC power source conversion device.
Optionally, in second analog comparator circuit, when instrument amplification voltage is more than the reference voltage
When, the second control signal is high level；When instrument amplification voltage is less than the reference voltage, second control
Signal is low level.
Optionally, in the power input control circuit, when the second control signal is high level, the power supply
Input control circuit is closed；When the second control signal is low level, the power input control circuit disconnects.
Optionally, the power input control circuit includes controllable switch.
Optionally, the temperature control voltage adjusting circuit further 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.
Optionally, the temperature control voltage adjusting circuit further 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.
Optionally, the temperature control voltage adjusting circuit further includes：Tertiary voltage follows circuit, the instrument to amplify described in voltage warp
Tertiary voltage inputs the subtraction circuit after following processing of circuit.
Optionally, the temperature control voltage adjusting circuit further includes：Pressure limiting circuit, the instrument amplification voltage input institute after pressure limiting
It states the second analog comparator circuit and the tertiary voltage follows circuit.
Optionally, in the analog switching circuit, when the first voltage is more than the second voltage, first control
It is first differential voltage that signal processed, which controls the first voltage, and the second voltage is second differential voltage；Work as institute
When stating first voltage less than the second voltage, it is first differential electrical that the first control signal, which controls the second voltage,
Pressure, the first voltage are second differential voltage.
Optionally, the difference of first temperature and the second temperature, first differential voltage and described second poor
The difference of component voltage is linearly increased or is linearly reduced.
Optionally, the output end of the power-switching circuit connects temperature equipment, and the temperature equipment is described for adjusting
The temperature of first space or the second space.
Technical solution of the embodiment of the present invention, has the following advantages that：
An embodiment of the present invention provides a kind of temperature control voltage adjusting circuits, including the first temperature measurement circuit, the second temperature measurement circuit, first
Analog comparator circuit, analog switching circuit, instrument operational amplifier circuit, the second analog comparator circuit, power input control circuit,
Power-switching circuit and subtraction circuit are generated according to the measuring temperature of the first temperature measurement circuit and the second temperature measurement circuit difference
Voltage it is different, to which by the first analog comparator circuit and analog switching circuit, voltage difference caused by the temperature difference is inputted instrument
Table operational amplifier circuit is amplified, by amplified voltage compared with the reference voltage of the second analog comparator circuit, when difference is big
When reference voltage, then so that power input control circuit is closed, the voltage of output exports target by power-switching circuit
Voltage, the target voltage and the amplified voltage of instrument operational amplifier circuit form feedback voltage by subtraction circuit, and power supply turns
Target voltage of the circuit by feedback voltage adjustment output is changed, the target voltage after the adjustment is adjusted for adjusting temperature equipment
Save the temperature of the first space or second space.The temperature control voltage adjusting circuit that the inventive embodiments provide, circuit structure is simple, stability
Electric current increase with reliability height, output makes its driving capability enhance, and the ripple of output voltage is small, improves the work of regulating circuit
Make efficiency.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, other drawings may also be obtained based on these drawings.
Fig. 1 is a circuit structure diagram of temperature control voltage adjusting circuit according to the ... of the embodiment of the present invention；
Fig. 2 is another circuit structure diagram of temperature control voltage adjusting circuit according to the ... of the embodiment of the present invention.
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
The every other embodiment that personnel are obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for the description present invention and simplify description, do not indicate or imply the indicated device or element must have a particular orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for description purposes only, and is not understood to indicate or imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the connection inside two elements, can be wirelessly connected, can also be wired connection.For those 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 be combined with each other at conflict.
Embodiment 1
An embodiment of the present invention provides a kind of temperature control voltage adjusting circuits, the 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 controls and exterior space temperature controls two links and controlled the accurate of measuring instrument operating temperature to realize,
Temperature control voltage adjusting circuit provided in an embodiment of the present invention, the temperature for adjusting the first space and second space, realization accurately control,
Improve regulating circuit working efficiency.
Fig. 1 is a circuit structure diagram of temperature control voltage adjusting circuit according to the ... of the embodiment 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
04, instrument operational amplifier 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 export first voltage according to the first temperature, the
Two temperature measurement circuits 02, the second temperature for measuring second space export second voltage, specifically, first according to second temperature
Space can be inner space, and second space can be outport space, and in another embodiment, 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 transformation between temperature signal and voltage signal.
First analog comparator circuit 03, two input terminal input above-mentioned first voltage and second voltage, pass through respectively
More above-mentioned first voltage and second voltage, output end export 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,
The first control signal of output is high level, if first voltage is less than second voltage, the first control signal exported is low
Then this first control signal is sent to analog switching circuit 04 by level.
Analog switching circuit 04, control terminal input above-mentioned first control signal, two input terminal inputs above-mentioned respectively
First voltage and second voltage, two output end export the first differential voltage and the second difference according to first control signal respectively
Voltage.There are two output ends altogether for analog switching circuit, and effect is to fix voltage larger in first voltage and second voltage
It is exported in an output end, and output end connection is the input terminal that larger voltage signal is inputted in instrument operational amplifier circuit 05,
It just can guarantee that the difference one of two voltage signals inputted in instrument operational amplifier circuit 05 is set to positive value in this way, 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, first control signal is high electricity
Flat, control first voltage is the first differential voltage of the first output end output, and second voltage is the second of second output terminal output
Differential voltage；When first voltage is less than second voltage, first control signal is low level, and control second voltage is the first output
It is the second differential voltage of second output terminal output to hold the first differential voltage of output, first voltage.So no matter first voltage
The first differential voltage with the height of second voltage, the output of the first output end is all higher voltage among the two, the second output
Second differential voltage of end output is all lower 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 is linearly increased or is reduced, in this way by monitoring the first differential voltage and second
The difference of differential voltage can reflect the temperature gap of the first space and second space.
Instrument operational amplifier circuit 05, first input end input above-mentioned first differential voltage, and the input of the second input terminal is above-mentioned
Second differential voltage, output end output meter amplify voltage.Due to the effect of analog switching circuit 04, no matter first voltage is
It is no to be more than second voltage, the first differential voltage voltage always bigger among the two, therefore the first differential voltage is more than second
Differential voltage, therefore the difference between first input end and second input terminal always remains as positive value so that instrument amplifier
Circuit 05 can work normally, and the difference of first differential voltage and the second differential voltage is after the amplification of instrument operational amplifier circuit 05
Voltage is amplified by its output end output meter.
Second analog comparator circuit 06, input terminal input instrument amplification voltage, which are amplified voltage and base
Quasi- voltage compares, and second control signal is exported according to comparison result.Reference voltage is a pre-set voltage value, this implementation
Voltage on the basis of 1.5V can be selected in example, when instrument amplification voltage is more than 1.5V, 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 be rationally arranged, and be traditionally arranged to be 1-
2V。
Power input control circuit 07, control terminal input second control signal, and power supply is controlled according to second control signal
It is switched in or out.Specifically, the power input control circuit 07 include controllable switch, the controllable switch can be triode or
Metal-oxide-semiconductor, when the second control signal of its control terminal input is high level, controllable switch controls the power input control circuit and closes
It closes, when second control signal is low level, controllable switch controls power input control circuit disconnection, to realize temperature control tune
The open and close of volt circuit.
Power-switching circuit 08, power input access the voltage of 07 output of power input control circuit, output end
Target voltage is exported, power-switching circuit further includes a voltage adjusting end, according to the signal adjustment output end output of voltage adjusting end input
Target voltage.The effect of power-switching circuit 08 is will to input its voltage to export after decompression is handled, and by the output
Voltage is sent to an input terminal of subtraction circuit 09, another input terminal input instrument amplification of subtraction circuit 09
Voltage, subtraction circuit 09 exports feedback voltage after the voltage that two input terminals input is done subtraction, and is sent to
To the voltage adjusting end of power-switching circuit 08, power-switching circuit 08 makes it according to the target voltage of feedback voltage adjustment output
It is eventually held in a voltage range, which is used to adjust the power of 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, which is 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, it can use the buck converter of other models, specific target voltage adjusting range can also be according to actual use situation
Setting.
Subtraction circuit 09, two input terminal inputs instrument amplification voltage and target voltage respectively, by target voltage
Subtraction is done with instrument amplification voltage and exports feedback voltage, and the feedback voltage is fed back to the pressure regulation of power-switching circuit 08
End, power-switching circuit 08 are adjusted the target voltage of output according to feedback voltage.Due to instrument amplification voltage be with
The temperature difference of first space and second space changes and changes, therefore the feedback voltage also can be with the first space and second space
Temperature difference variation and change, decompression of feedback voltage that power-switching circuit 08 is gone out by the subtraction realization to target voltage
It is handled with pressure regulation, target voltage can adjust the power of temperature equipment, the first space of temperature equipment pair as power adjustment voltage
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 in the prior art
Circuit realizes the voltage of adjustment temperature equipment by high pressure height stream amplifier is directly inputted after the signal difference amplification of sensor, due to
High pressure height stream amplifier is all linear amplifier at present, and the electric current of output is smaller, only 500mA, and load capacity is not strong, and because is used
High pressure height stream amplifier is so cause circuit calorific value big, inefficiency, therefore it is slow to adjust temperature, cannot in time by first
Space is consistent with the adjusting of the temperature of second space；And in the present embodiment, by power-switching circuit 08 according to subtraction electricity
The feedback voltage that road 09 exports is adjusted the target voltage of output, and the output current of power-switching circuit can reach 5A, from
And current output capability is substantially increased, bearing power significantly improves, therefore can the temperature to the first space and second in time
The temperature in space is adjusted, it is made to reach 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 further includes that first voltage follows circuit, second voltage that circuit and tertiary voltage is followed to follow circuit.Specifically, first voltage passes through
First voltage follows and inputs the first analog comparator circuit 03 and analog switching circuit 04 after processing of circuit, and second voltage is through the
The first analog comparator circuit 03 of input and analog switching circuit 04 after the processing of two voltage follower circuits, instrument amplify voltage warp
Tertiary voltage follows input subtraction circuit 09 after processing of circuit.The operation element of voltage follower circuit is voltage follower,
The input voltage of voltage follower is identical with output voltage, i.e. the voltage amplification factor perseverance of voltage follower is less than and approaches
In 1, voltage follower the advantages of it is that input impedance is high and output impedance is low, in general, input impedance can reach several megaohms
Nurse, and usually only several ohm of output impedance, it is even lower, therefore reduce the impedance in circuit using voltage follower.
The temperature control voltage adjusting circuit further includes pressure limiting circuit, as shown in Fig. 2, the instrument amplification electricity that magnifier 05 exports
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 to carry out pressure limiting to instrument amplification voltage herein
The voltage on road 06 is excessive and damages its component, while keeping feedback electric in order to avoid the voltage of input subtraction circuit is excessive
Existing negative value is extruded, DCDC power-switching circuits 08 is influenced and the target voltage of output is adjusted according to feedback voltage.
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 the device power supply in entire temperature control voltage adjusting circuit to be adjusted to DC5V, and DC28V is directly that power input control circuit 07 is powered, such as
Shown in Fig. 2.It is mostly integrated chip additionally, due to comparator in the prior art, is provided with one or more comparator electricity
Road, therefore the first analog comparator 03 in the embodiment above and the second analog comparator 06 can pass through a comparison
Device chip IC realizes that the comparator chip interior is at least integrated, and there are two comparator circuits.
Temperature control voltage adjusting circuit in the embodiment of the present invention, specific workflow are：First temperature measurement circuit 01 is for detecting
Temperature in confined space, the second temperature measurement circuit are used to detect the environment temperature outside temperature control box, and two temperature measurement circuits export respectively
First voltage and second voltage, first voltage first simulation of equivalent input 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
The first control signal of quasi- comparator circuit 03 and analog switching circuit 04, the output of the first analog comparator circuit 03 mainly controls
The voltage that analog switching circuit 04 exports is positive value forever.When the temperature in confined space and the reference temperature outside confined space are poor
For value at 3 DEG C, the pressure difference of the first differential voltage and the second differential voltage that analog switching circuit 04 exports is 0.0091V, with
The temperature in confined space and the linear increase of reference temperature difference outside confined space, the first differential voltage and the second differential voltage
Pressure difference linearly increase also with the variation of temperature difference or linearly reduce, 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 operational amplifier circuit 05, obtains instrument and puts
The amplification factor of big voltage, instrument operational amplifier circuit 05 can also be arranged as needed, be typically chosen 80-200 times or so.The instrument
Table amplifies control source pressure limiting circuit, it is maximum to 3V is limited to, and tertiary voltage follows circuit equivalent output after pressure limiting
Instrument amplifies voltage (generally 1.5-3V), and 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 as 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, and power input control circuit 07 is enabled at this time, and DCDC power supplys are converted defeated
Enter end to be powered, DCDC starts to work.When instrument amplification voltage after pressure limiting is less than 1.5V, the second analog comparator circuit 06 is defeated
Go out low level signal, the input terminal power-off of DCDC power supplys conversion at this time, DCDC is stopped.DCDC power-switching circuits 08 export
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 feet of DCDC power-switching circuits 08, i.e., the voltage adjusting end of above-mentioned power-switching circuit makes DCDC power supplys turn
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 variation
The electric current gone out can reach 5A.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.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 variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope 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 export second voltage according to the second temperature；
First analog comparator circuit, two input terminal input the first voltage and the second voltage respectively, pass through ratio
The first voltage and the second voltage, output end export first control signal；
Analog switching circuit, control terminal input the first control signal, two input terminal inputs first electricity respectively
Pressure and the second voltage, two output end export the first differential voltage and second poor respectively according to the first control signal
Component voltage；
Instrument operational amplifier circuit, first input end input first differential voltage, and the second input terminal input described second is poor
Component voltage, output end output meter amplify voltage；
Second analog comparator circuit, input terminal input the instrument and amplify voltage, and the instrument is amplified voltage and benchmark
Voltage compares, and second control signal is exported according to comparison result；
It is characterized in that, further including：
Power input control circuit, control terminal input the second control signal, and electricity is controlled according to the second control signal
Source is switched in or out；
Power-switching circuit, power input access the voltage of the power input control circuit output, output end output
Target voltage, the power-switching circuit further include a voltage adjusting end, according to the signal adjustment output end output of voltage adjusting end input
Target voltage；
Subtraction circuit, two input terminal 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 to the power supply
The voltage adjusting end of conversion circuit, the power-switching circuit are adjusted the target voltage of output according to the feedback voltage.
2. temperature control voltage adjusting circuit according to claim 1, which is characterized 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, which is characterized in that in second analog comparator circuit
In, when instrument amplification voltage is more than the reference voltage, the second control signal is high level；When the instrument is put
When big voltage is less than the reference voltage, the second control signal is low level.
4. temperature control voltage adjusting circuit according to claim 3, which is characterized in that in the power input control circuit, when
When the second control signal is high level, the power input control circuit is closed；When the second control signal is low electricity
Usually, the power input control circuit disconnects.
5. temperature control voltage adjusting circuit according to claim 1, which is characterized in that the power input control circuit includes controllable
Switch.
6. temperature control voltage adjusting circuit according to claim 1, which is characterized in that further 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, which is characterized in that further include：Second voltage follows circuit, described
Second voltage is followed through the second voltage inputs first 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, which is characterized in that further include：Tertiary voltage follows circuit, described
Instrument amplification voltage inputs the subtraction circuit after the tertiary voltage follows processing of circuit.
9. temperature control voltage adjusting circuit according to claim 8, which is characterized in that further 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, which is characterized in that in the analog switching circuit, when described
When one voltage is more than the second voltage, it is first differential voltage that the first control signal, which controls the first voltage,
The second voltage is second differential voltage；When the first voltage is less than the second voltage, first control
It is first differential voltage that signal, which controls the second voltage, and the first voltage is second differential voltage.
11. temperature control voltage adjusting circuit according to claim 1, which is characterized 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 claims 1 or 2 or 4-11, which is characterized in that the power supply turns
The output end connection temperature equipment of circuit is changed, the temperature equipment is used to adjust the temperature of first space or the second space
Degree.
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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 |
| 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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| CN101169665B (en) * | 2006-10-27 | 2011-04-06 | 台达电子工业股份有限公司 | Fan system and motor drive and control device |
| JP5060988B2 (en) * | 2008-02-18 | 2012-10-31 | セイコーインスツル株式会社 | Temperature detection circuit |
| CN104501986B (en) * | 2014-12-16 | 2017-08-29 | 北京航天时代光电科技有限公司 | A kind of high precision and large measuring range temperature measurement system |
| CN106502299B (en) * | 2016-12-20 | 2017-11-28 | 华通信安(北京)科技发展有限公司 | A kind of temperature control voltage adjusting circuit |
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Effective date of registration: 20221213 Address after: 7th Floor, Zhongguancun Intellectual Property Building, 21 Haidian South Road, Haidian District, Beijing 100089 Patentee after: Beijing Intellectual Property Management Co.,Ltd. Address before: 100095 Internet Innovation Center 512, Building 5, East District, Yard 10, Northwest Wangdong Road, Haidian District, Beijing Patentee before: HUATONG XIN'AN (BEIJING) TECHNOLOGY DEVELOPMENT CO.,LTD. |