CN104731129A - Remote control unit and temperature sampling control system and method - Google Patents
Remote control unit and temperature sampling control system and method Download PDFInfo
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- CN104731129A CN104731129A CN201510050934.0A CN201510050934A CN104731129A CN 104731129 A CN104731129 A CN 104731129A CN 201510050934 A CN201510050934 A CN 201510050934A CN 104731129 A CN104731129 A CN 104731129A
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Abstract
The invention belongs to the field of household appliances, and particularly relates to a remote control unit with low power consumption and a temperature sampling control system and method. When the IO port of a microprocessor MCU outputs the high level, the voltage is sampled through a first AD sampling port and a second AD sampling port, the resistance value of a thermistor RT is calculated through a voltage division formula, and a temperature parameter value corresponding to the resistance value is acquired. The remote control unit has the main advantages that the IO port of the microprocessor MCU outputs the high level so as to provide the sampling voltage, the IO port outputs the low level at most of the time so that the whole temperature sampling control system can be in a standby non-sampling state, power consumption is not generated, and the system is in an extremely-low power consumption state for a long time. In addition, the temperature sampling control system is simple in structure and low in cost, and the temperature sampling control method also has the advantages that convenience is brought, cost is low, and portability is high.
Description
Technical field
The invention belongs to household appliance technical field, particularly relate to a kind of telepilot of low-power consumption, temperature sampling control system and control method.
Background technology
Current most of household appliances all will be sampled to temperature sensor (thermistor RT), mostly traditional method is to adopt structure as shown in Figure 1 to carry out: the mode utilizing two resistance (thermistor RT and resistance R1) dividing potential drop of connecting, and carries out AD conversion to complete temperature sampling by Micro-processor MCV.But this circuit can produce power consumption P=U*U/ (RT+R1) for a long time, and in this formula, U is supply voltage, and RT is the resistance of thermistor, and R1 is divider resistance resistance.So, when on the telepilot that this temperature sampling circuit is applied in household electrical appliances, then greatly can shorten the life-span of battery.
Summary of the invention
In view of this, namely object of the present invention is the telepilot providing a kind of temperature sampling control system, control method and adopt this temperature sampling control system, is intended to solve the higher technical matters of existing temperature sampling circuit power consumption.
To achieve these goals, first aspect, temperature sampling control system provided by the invention comprises reference resistance R1, thermistor RT, Micro-processor MCV and IO port thereof and two AD sampling ports;
Described reference resistance R1 and thermistor RT is serially connected between the IO port of described Micro-processor MCV and ground, one AD sampling port of described Micro-processor MCV is connected with IO port, and the 2nd AD sampling port of described Micro-processor MCV is connected on being connected in series on point of described reference resistance R1 and thermistor RT.
Second aspect, telepilot provided by the invention, that includes a temperature sampling control system, it is characterized in that, described temperature sampling control system comprises reference resistance R1, thermistor RT, Micro-processor MCV and IO port thereof and two AD sampling ports; Described reference resistance R1 and thermistor RT is serially connected between the IO port of described Micro-processor MCV and ground, one AD sampling port of described Micro-processor MCV is connected with IO port, and the 2nd AD sampling port of described Micro-processor MCV is connected on being connected in series on point of described reference resistance R1 and thermistor RT.
The third aspect, the temperature sampling control method realized based on said temperature sampled-data control system provided by the invention, comprises the following steps:
There is provided the step of sampled voltage: the IO port of Micro-processor MCV exports high level to provide sampling voltage, and keeps output first preset duration T1;
Voltage sample step: magnitude of voltage Varef, the 2nd AD sampling port acquisition reference resistance R1 of an AD sampling port acquisition IO port of Micro-processor MCV and the branch pressure voltage value V be connected in series on point of thermistor RT;
Temperature obtaining step: Micro-processor MCV calculates the resistance of thermistor RT according to voltage division formulas, and obtain temperature parameter value corresponding thereto;
Low-power consumption standby step: the IO port output low level of Micro-processor MCV enters holding state, and maintains the second preset duration T2.
According to telepilot provided by the invention, temperature sampling control system and control method, when the IO port of Micro-processor MCV exports high level, voltage sampling is carried out respectively by an AD sampling port and the 2nd AD sampling port, calculated the resistance of thermistor RT again by voltage division formulas, and obtain temperature parameter value corresponding thereto.Advantage of the present invention is mainly: export high level to provide sampling voltage by the IO port of Micro-processor MCV, but IO port output low level makes whole temperature sampling control system be in standby non-sampled state in the most of the time, can not power consumption be produced, therefore be in extremely low power dissipation state for a long time.In addition, the structure of this temperature sampling control system is simple, cost is low, the advantage that temperature sampling control method also has is convenient, cost is low, portability is strong.
Accompanying drawing explanation
Fig. 1 is the structural drawing of existing temperature sampling device;
Fig. 2 is the structural representation of the temperature sampling control system that first embodiment of the invention provides;
Fig. 3 is the structural representation of the temperature sampling control system that second embodiment of the invention provides;
Fig. 4 is the structural representation of the temperature sampling control system that third embodiment of the invention provides;
Fig. 5 is the structural representation of the temperature sampling control system that fourth embodiment of the invention provides;
Fig. 6 is the realization flow figure of the temperature sampling control method that another embodiment of the present invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
First the embodiment of the present invention provides a kind of temperature sampling control system, mainly comprises reference resistance R1, thermistor RT, Micro-processor MCV and IO port thereof and two AD sampling ports; Wherein, reference resistance R1 and thermistor RT is serially connected between the IO port of Micro-processor MCV and ground, one AD sampling port of Micro-processor MCV is connected with IO port, and the 2nd AD sampling port of Micro-processor MCV is connected on being connected in series on point of reference resistance R1 and thermistor RT.
The basic functional principle of said temperature sampled-data control system is: when the IO port of Micro-processor MCV exports high level, voltage sampling is carried out respectively by an AD sampling port and the 2nd AD sampling port, calculated the resistance of thermistor RT again by voltage division formulas, and obtain temperature parameter value corresponding thereto.Explanation is further explained below by several embodiment.
Fig. 2 is the structural representation of the temperature sampling control system that first embodiment of the invention provides; For convenience of explanation, illustrate only part related to the present embodiment, as shown in the figure:
Temperature sampling control system comprises reference resistance R1, thermistor RT, Micro-processor MCV and IO port thereof and two AD sampling ports.Wherein, the first end of thermistor RT connects IO port and an AD sampling port of described Micro-processor MCV simultaneously, second end of thermistor RT connects the 2nd AD sampling port of Micro-processor MCV and the first end of reference resistance R1, the second end ground connection of reference resistance R1 simultaneously.
In the middle of the course of work of said temperature sampled-data control system, first high level is exported to provide sampling voltage by the IO port of Micro-processor MCV, general, in order to ensure the stable of output voltage, the time exporting high level can remain within 0.01 ~ 1ms.The time of certain output high level also need not be oversize, oversizely will cause unnecessary power consumption.Then, an AD sampling port respectively by Micro-processor MCV obtains magnitude of voltage Varef, the 2nd AD sampling port acquisition thermistor RT of IO port and the branch pressure voltage value V be connected in series on point of reference resistance R1, Micro-processor MCV calculates the resistance of described thermistor RT again according to voltage division formulas, and obtains temperature parameter value corresponding thereto.After getting temperature parameter value, the IO port output low level of Micro-processor MCV enters holding state, just no longer produces power consumption.Further, in order to ensure sample effect and low-power consumption effect, the stand-by time of low-power consumption generally can maintain between 100 ~ 5000ms.
In the present embodiment, after the branch pressure voltage value V that Micro-processor MCV obtains the magnitude of voltage Varef of IO port by its AD sampling port, the 2nd AD sampling port obtains thermistor RT and reference resistance R1 is connected in series on point, the voltage division formulas calculating the resistance of acquisition thermistor RT is specially:
V/ (Varef-V)=R1/RT, wherein RT is the resistance of thermistor RT, and R1 is the resistance of reference resistance R1.Known Varef, V and R1 and value, directly can obtain the resistance of thermistor RT.
Fig. 3 is the structural representation of the temperature sampling control system that second embodiment of the invention provides; Same, for convenience of explanation, illustrate only part related to the present embodiment, as shown in the figure:
In the present embodiment, temperature sampling control system comprises reference resistance R1, thermistor RT, Micro-processor MCV and IO port thereof and two AD sampling ports; Wherein, the first end of reference resistance R1 connects IO port and an AD sampling port of Micro-processor MCV simultaneously, second end of reference resistance R1 connects the 2nd AD sampling port of Micro-processor MCV and the first end of thermistor RT, the second end ground connection of thermistor RT simultaneously.
The difference of the temperature sampling control system provided with aforementioned first embodiment is, the reference resistance R1 in this second embodiment and the position relationship of thermistor RT there occurs change.Accordingly, after the branch pressure voltage value V that Micro-processor MCV obtains the magnitude of voltage Varef of IO port by its AD sampling port, the 2nd AD sampling port obtains reference resistance R1 and thermistor RT is connected in series on point, the voltage division formulas calculating the resistance of acquisition thermistor RT just becomes:
(Varef-V)/V=R1/RT, wherein RT is the resistance of thermistor RT, and R1 is the resistance of reference resistance R1.Same known Varef, V and R1 and value, directly can obtain the resistance of thermistor RT.
Fig. 4 and Fig. 5 is the structural representation of the temperature sampling control system that the present invention the 3rd, the 4th embodiment provides respectively.
See Fig. 4, the temperature sampling control system that 3rd embodiment provides, except comprising reference resistance R1, thermistor RT, Micro-processor MCV and IO port thereof and two AD sampling ports, also comprises one and is connected to switch module between the IO port of Micro-processor MCV and thermistor RT.Particularly, the IO port of the control termination Micro-processor MCV of switch module, the noble potential termination working power VCC of switch module, the cold end of switch module connects an AD sampling port of Micro-processor MCV and the first end of thermistor RT simultaneously.
See Fig. 5, the temperature sampling control system that 4th embodiment provides, except comprising reference resistance R1, thermistor RT, Micro-processor MCV and IO port thereof and two AD sampling ports, also comprises one and is connected to switch module between the IO port of Micro-processor MCV and reference resistance R1.Particularly, the IO port of the control termination Micro-processor MCV of switch module, the noble potential termination working power VCC of switch module, the cold end of switch module connects an AD sampling port of Micro-processor MCV and the first end of reference resistance R1 simultaneously.
According to the temperature sampling control system that Fig. 4, Fig. 5 embodiment provides, first export high level (but this high level should be lower than the voltage of working power VCC) by the IO port of Micro-processor MCV, make switch module conducting, to provide sampling voltage, also for ease of and ensure the stable of output voltage, the time exporting high level can remain within 0.01 ~ 1ms.Then, an AD sampling port respectively by Micro-processor MCV obtains connect with the resistance magnitude of voltage Varef of part, the 2nd AD sampling port of the cold end of switch module and obtains the branch pressure voltage value V be connected in series on point of thermistor RT and reference resistance R1, Micro-processor MCV calculates the resistance of described thermistor RT again according to voltage division formulas, and obtains temperature parameter value corresponding thereto.After getting temperature parameter value, the IO port output low level of Micro-processor MCV makes switch module end, and system enters holding state, just no longer produces power consumption.Further, in order to ensure sample effect and low-power consumption effect, the stand-by time of low-power consumption generally can maintain between 100 ~ 5000ms.
Further, the temperature sampling control system that Fig. 4, Fig. 5 embodiment provides also is only that the position of reference resistance R1 in two embodiments and thermistor RT there occurs exchange.Principle of work is identical with the principle of work of the temperature sampling control system that first, second embodiment above-mentioned provides, and just repeats no more at this.It is emphasized that in the 3rd embodiment shown in Fig. 4, the voltage division formulas calculating the resistance obtaining thermistor RT is specially: V/ (Varef-V)=R1/RT; In the 4th embodiment shown in Fig. 5, the voltage division formulas calculating the resistance obtaining thermistor RT is specially: (Varef-V)/V=R1/RT.Same, known Varef, V and R1 and value, can obtain the resistance of thermistor RT further.
Further, the embodiment of the present invention also provides a kind of telepilot.This telepilot its go for the various household electrical appliance such as small household appliances, televisor, air-conditioning, refrigerator.As improvement, in this telepilot, include the temperature sampling control system as above described in any embodiment.Structure for this temperature sampling control system just repeats no more, but for reference resistance R1 wherein, preferably, it is good for selecting resistance to be the resistance of 10 ~ 800K Ω.
On the other hand, the embodiment of the present invention additionally provides a kind of temperature sampling control method realized based on said temperature sampled-data control system.Described from the course of work of said temperature sampled-data control system, this temperature sampling control method mainly comprises the following steps, specifically see Fig. 6:
There is provided the step S10 of sampled voltage: the IO port of Micro-processor MCV exports high level to provide sampling voltage, and keeps output first preset duration T1;
Voltage sample step S20: magnitude of voltage Varef, the 2nd AD sampling port acquisition reference resistance R1 of an AD sampling port acquisition IO port of Micro-processor MCV and the branch pressure voltage value V be connected in series on point of thermistor RT;
Temperature obtaining step S30: Micro-processor MCV calculates the resistance of thermistor RT according to voltage division formulas, and obtain temperature parameter value corresponding thereto;
Low-power consumption standby step S40: the IO port output low level of Micro-processor MCV enters holding state, and maintains the second preset duration T2.
According to the description of the embodiment of above-mentioned relevant temperature sampled-data control system, if temperature sampling control system as shown in Fig. 4 or Fig. 5, comprise a switch module, the step S10 of sampled voltage is provided to be specially then: the IO port of Micro-processor MCV exports high level, controls coupled switch module conducting to provide sampling voltage, and keeps output first preset duration T1;
Described low-power consumption standby step S40 is specially: the IO port output low level of Micro-processor MCV, control the cut-off of described switch module to enter holding state, and maintains the second preset duration T2.
Further, according to previous embodiment, in specific implementation process, the first preset duration T1 is preferably the arbitrary time between 0.01 ~ 1ms, and the second preset duration T2 is preferably the arbitrary time between 100 ~ 5000ms.
Further, if thermistor RT is connected between the IO port of Micro-processor MCV and reference resistance R1, then described voltage division formulas is V/ (Varef-V)=R1/RT;
If reference resistance R1 is connected between the IO port of Micro-processor MCV and thermistor RT, then described voltage division formulas is (Varef-V)/V=R1/RT.
In sum, according to telepilot provided by the invention, temperature sampling control system and control method, when the IO port of Micro-processor MCV exports high level, voltage sampling is carried out respectively by an AD sampling port and the 2nd AD sampling port, calculated the resistance of thermistor RT again by voltage division formulas, and obtain temperature parameter value corresponding thereto.Advantage of the present invention is mainly: export high level to provide sampling voltage by the IO port of Micro-processor MCV, but IO port output low level makes whole temperature sampling control system be in standby non-sampled state in the most of the time, can not power consumption be produced, therefore be in extremely low power dissipation state for a long time.In addition, the structure of this temperature sampling control system is simple, cost is low, the advantage that temperature sampling control method also has is convenient, cost is low, portability is strong.
It should be noted that in above-described embodiment, included unit is carry out dividing according to function logic, but is not limited to above-mentioned division, as long as can realize corresponding function; In addition, the concrete title of each functional unit, also just for the ease of mutual differentiation, is not limited to protection scope of the present invention.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, although with reference to previous embodiment to invention has been comparatively detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments or carry out equivalent replacement to wherein portion of techniques feature.All any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a temperature sampling control system, is characterized in that, described temperature sampling control system comprises reference resistance R1, thermistor RT, Micro-processor MCV and IO port thereof and two AD sampling ports;
Described reference resistance R1 and thermistor RT is serially connected between the IO port of described Micro-processor MCV and ground, one AD sampling port of described Micro-processor MCV is connected with IO port, and the 2nd AD sampling port of described Micro-processor MCV is connected on being connected in series on point of described reference resistance R1 and thermistor RT.
2. temperature sampling control system as claimed in claim 1, it is characterized in that, the first end of described thermistor RT connects IO port and an AD sampling port of described Micro-processor MCV simultaneously, second end of described thermistor RT connects the 2nd AD sampling port of Micro-processor MCV and the first end of reference resistance R1, the second end ground connection of described reference resistance R1 simultaneously.
3. temperature sampling control system as claimed in claim 1, it is characterized in that, the first end of described reference resistance R1 connects IO port and an AD sampling port of described Micro-processor MCV simultaneously, second end of described reference resistance R1 connects the 2nd AD sampling port of Micro-processor MCV and the first end of thermistor RT, the second end ground connection of described thermistor RT simultaneously.
4. temperature sampling control system as claimed in claim 2, is characterized in that, described temperature sampling control system also comprises one and is connected to switch module between the IO port of described Micro-processor MCV and described thermistor RT;
The IO port of Micro-processor MCV described in the control termination of described switch module, the noble potential termination working power VCC of described switch module, the cold end of described switch module connects an AD sampling port of described Micro-processor MCV and the first end of described thermistor RT simultaneously.
5. temperature sampling control system as claimed in claim 3, is characterized in that, described temperature sampling control system also comprises one and is connected to switch module between the IO port of described Micro-processor MCV and described reference resistance R1;
The IO port of Micro-processor MCV described in the control termination of described switch module, the noble potential termination working power VCC of described switch module, the cold end of described switch module connects an AD sampling port of described Micro-processor MCV and the first end of described reference resistance R1 simultaneously.
6. a telepilot, comprises a temperature sampling control system, it is characterized in that, described temperature sampling control system comprises reference resistance R1, thermistor RT, Micro-processor MCV and IO port thereof and two AD sampling ports;
Described reference resistance R1 and thermistor RT is serially connected between the IO port of described Micro-processor MCV and ground, one AD sampling port of described Micro-processor MCV is connected with IO port, and the 2nd AD sampling port of described Micro-processor MCV is connected on being connected in series on point of described reference resistance R1 and thermistor RT.
7., based on the temperature sampling control method that temperature sampling control system as claimed in claim 1 realizes, it is characterized in that, described control method comprises the following steps:
There is provided the step of sampled voltage: the IO port of Micro-processor MCV exports high level to provide sampling voltage, and keeps output first preset duration T1;
Voltage sample step: magnitude of voltage Varef, the 2nd AD sampling port acquisition reference resistance R1 of an AD sampling port acquisition IO port of Micro-processor MCV and the branch pressure voltage value V be connected in series on point of thermistor RT;
Temperature obtaining step: Micro-processor MCV calculates the resistance of described thermistor RT according to voltage division formulas, and obtain temperature parameter value corresponding thereto;
Low-power consumption standby step: the IO port output low level of Micro-processor MCV enters holding state, and maintains the second preset duration T2.
8. temperature sampling control method as claimed in claim 7, is characterized in that:
The described step of sampled voltage that provides is specially: the IO port of Micro-processor MCV exports high level, controls coupled switch module conducting to provide sampling voltage, and keeps output first preset duration T1;
Described low-power consumption standby step is specially: the IO port output low level of Micro-processor MCV, control the cut-off of described switch module to enter holding state, and maintains the second preset duration T2.
9. temperature sampling control method as claimed in claim 7, it is characterized in that, described first preset duration T1 is the arbitrary time between 0.01 ~ 1ms, and described second preset duration T2 is the arbitrary time between 100 ~ 5000ms.
10. temperature sampling control method as claimed in claim 7, is characterized in that, in described temperature obtaining step:
If described thermistor RT is connected between the IO port of described Micro-processor MCV and reference resistance R1, then described voltage division formulas is V/ (Varef-V)=R1/RT;
If described reference resistance R1 is connected between the IO port of described Micro-processor MCV and thermistor RT, then described voltage division formulas is (Varef-V)/V=R1/RT;
Wherein, the RT in above-mentioned two formula is the resistance of described thermistor RT, and R1 is the resistance of described reference resistance R1.
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| CN201510050934.0A CN104731129A (en) | 2015-01-31 | 2015-01-31 | Remote control unit and temperature sampling control system and method |
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| CN201510050934.0A CN104731129A (en) | 2015-01-31 | 2015-01-31 | Remote control unit and temperature sampling control system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106768457A (en) * | 2017-01-03 | 2017-05-31 | 珠海格力电器股份有限公司 | A kind of thermistor temp Acquisition Circuit and its self checking method |
| CN107632654A (en) * | 2017-07-14 | 2018-01-26 | 成都光创联科技有限公司 | A kind of non-hermetically sealed encapsulated laser working environment humidity and automatic temperature control system |
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| CN2824003Y (en) * | 2005-08-31 | 2006-10-04 | 乐金电子(天津)电器有限公司 | Temp precise acquiring circuit for air conditioner |
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| CN107632654A (en) * | 2017-07-14 | 2018-01-26 | 成都光创联科技有限公司 | A kind of non-hermetically sealed encapsulated laser working environment humidity and automatic temperature control system |
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