CN110311356A - A kind of over-temperature protection device of program-controlled temperature control system - Google Patents
A kind of over-temperature protection device of program-controlled temperature control system Download PDFInfo
- Publication number
- CN110311356A CN110311356A CN201910640098.XA CN201910640098A CN110311356A CN 110311356 A CN110311356 A CN 110311356A CN 201910640098 A CN201910640098 A CN 201910640098A CN 110311356 A CN110311356 A CN 110311356A
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- China
- Prior art keywords
- heater
- temperature
- chip microcontroller
- temperature sensor
- heater driver
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
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- Control Of Temperature (AREA)
Abstract
The invention discloses a kind of over-temperature protection devices of program-controlled temperature control system; including single-chip microcontroller, digital temperature sensor, heater driver and heater; the heater driver is electrically connected with the heater; the enable end of the heater driver and the trigger output end of the digital temperature sensor are electrically connected to each other, and the control signal of the heater driver is electrically connected with the IO control port of the single-chip microcontroller；Excess temperature threshold value is written in digital temperature sensor by data/address bus for single-chip microcontroller or other digitial controllers; when digital temperature sensor temperature measurement result is more than preset temperature threshold; level change will be generated in an output port; the output port can be such that port connect with heater driver; when the output port level change; the output of heater driver is automatically closed, so that the temperature for controlling heater is in always under given threshold temperature, realizes to the overheat protector for being heated object.
Description
Technical field
The invention belongs to overheat protector equipment technical fields, and in particular to a kind of overheat protector dress of program-controlled temperature control system
It sets.
Background technique
Heter temperature control is widely adopted in various industries.But the safety issue of heater is also closed
Note, according to traditional safety requirement, heater under any device single failure, shall not occur temperature it is uncontrolled always on
It rises phenomena such as even on fire, traditional solution mainly seals in temperature switch in heating installation power supply circuit, for detecting
Heter temperature disconnects heating installation power supply after heter temperature reaches a certain limit value.Form that there are two types of temperature switches, one
Kind is self- recoverage type, and one kind is non-self- recoverage type, and traditional programmable temperature control system passes through single-chip microcontroller (MCU) or other numbers
Word controller (Digital Controller) controls heater driver, and the temperature of Timing measurement heater, when temperature measures
When being as a result more than preset temperature threshold, the power supply of control heater driver cutting heater, to achieve the purpose that overheating protection.
However in the case that hardware or software failure occurs for single-chip microcontroller or other digitial controllers, heater driver is in shape out of control
State, if heater is in power supply heated condition at this time, it will so that heter temperature persistently increases, so as to cause object is heated
It crosses cause thermal damage or even leads to fire.
Summary of the invention
The purpose of the present invention is to provide a kind of over-temperature protection devices of program-controlled temperature control system, to solve above-mentioned background technique
Middle proposition in the case that hardware or software failure occurs for single-chip microcontroller or other digitial controllers, heater driver is in out of control
State, if heater is in power supply heated condition at this time, it will so that heter temperature persistently increases, so as to cause being heated pair
As spending the problem of cause thermal damage even leads to fire.
To achieve the above object, present invention employs following technical solutions: a kind of overheat protector dress of program-controlled temperature control system
It sets, including single-chip microcontroller, digital temperature sensor, heater driver and heater, the heater driver and heater electricity
Connection, the enable end of the heater driver and the trigger output end of the digital temperature sensor are electrically connected to each other, described to add
The control signal of hot driver is electrically connected with the IO control port of the single-chip microcontroller, the digital bus interface of the single-chip microcontroller with
The digital bus interface of the digital temperature sensor connects.
Preferably, the single-chip microcontroller is connect with the digital temperature sensor by the mutual signal of data/address bus, the list
Piece machine is connect by data/address bus with the heater driver signal, the digital temperature sensor by hardware connection with it is described
The connection of heater driver signal, the heater driver are connected by hardware and are connect with the heater signal.
Preferably, the digital temperature sensor is written by the data/address bus in overheat protector threshold value by the single-chip microcontroller
Memory in, even if the single-chip microcontroller breaks down later or communication failure, the digital temperature sensor are remained in temperature
Heater driver is triggered when more than given threshold stops heating.
Technical effect and advantage of the invention: a kind of over-temperature protection device of program-controlled temperature control system proposed by the present invention, with
The prior art is compared, and is had the advantage that
Excess temperature threshold value is written in digital temperature sensor by data/address bus for single-chip microcontroller or other digitial controllers, works as number
When word temperature sensor temperature measurement result is more than preset temperature threshold, level change will be generated in an output port, this is defeated
Exit port can be such that port connect with heater driver, when the output port level change (such as being switched to low level from high level)
When, the output of heater driver is automatically closed, so that the temperature for controlling heater is in always under given threshold temperature, realizes
To the overheat protector for being heated object.
Detailed description of the invention
Fig. 1 is circuit diagram of the invention；
Fig. 2 is program-controlled temperature control system figure of the invention.
In figure: 10, single-chip microcontroller；20, digital temperature sensor；30, heater driver；40, heater.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It needs
Illustrate, in the description of the present invention unless specifically defined or limited otherwise, term " connection " shall be understood in a broad sense, example
Such as, it may be fixed connection or may be dismantle connection, or integral connection；It can be mechanical connection, be also possible to electrical property
Connection；It can be directly connected, it can also be indirectly connected through an intermediary.For the ordinary skill in the art,
The concrete meaning of above-mentioned term in the present invention can be understood with concrete condition, based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment
The present invention provides a kind of over-temperature protection device technical solution of program-controlled temperature control system referring to FIG. 1-2: a kind of program-controlled
The over-temperature protection device of temperature control system, including single-chip microcontroller 10, digital temperature sensor 20, heater driver 30 and heater 40,
The heater driver 30 is electrically connected with the heater 40, and the enable end of the heater driver 30 and the digital temperature pass
The trigger output end of sensor 20 is electrically connected to each other, and the IO of the control signal of the heater driver 30 and the single-chip microcontroller 10 is controlled
The digital bus interface of port electrical connection processed, the digital bus interface of the single-chip microcontroller 10 and the digital temperature sensor 20 connects
It connects；Excess temperature threshold value is written in digital temperature sensor by data/address bus for single-chip microcontroller or other digitial controllers, when digital temperature
When spending sensor temperature measurement result more than preset temperature threshold, level change, the output end will be generated in an output port
Mouth can be such that port connect with heater driver, when output port level change (such as being switched to low level from high level),
The output of heater driver is automatically closed, and the temperature for controlling heater is in always under given threshold temperature, is realized to quilt
The overheat protector of heating target.
In the present embodiment, the model ATSAM3X single-chip microcontroller of single-chip microcontroller 10, the model of digital temperature sensor 20
ADT7410 digital temperature sensor chip, the model DRV8701 driving chip of heater driver 30, the model of heater 40
For a-08, the model CSD18532Q5B of mosfet transistor.
Specific in the present embodiment: the single-chip microcontroller 10 is mutual by data/address bus 1 with the digital temperature sensor 20
Signal connection, the single-chip microcontroller 10 are connect by data/address bus 2 with 30 signal of heater driver, the digital temperature sensing
Device 20 is connect by hardware connection 1 with 30 signal of heater driver, and the heater driver 30 passes through hardware connection 2 and institute
State the connection of 40 signal of heater.
Specific in the present embodiment: the single-chip microcontroller 10 overheat protector threshold value is written by the data/address bus 1 described
In the memory of digital temperature sensor 20, even if the single-chip microcontroller 10 breaks down later or communication failure, the number are warm
Degree sensor 20 remains to the triggering heater driver when temperature is more than given threshold and stops heating.
Working principle or structural principle: firstly, being placed in temperature sensor close to the side of heater 40, make temperature
Sensor receives the information of temperature in local environment, and single-chip microcontroller 10 or other digitial controllers pass through data/address bus for excess temperature threshold value
It is written in the register of digital temperature sensor 20, single-chip microcontroller 10 or other digitial controllers control heating by data/address bus and drive
Dynamic device 30 heats heater 40 or stops heating, the operating temperature of 20 real-time measurement heater 40 of digital temperature sensor, when
When temperature measurement result is more than default excess temperature threshold value, upper output level variation is connected in hardware, is such as low electricity from high level variation
Flat, the cancellation that low level corresponds to heating controller 30 at this time enables, and vice versa, and the port of heater driver 30, which receives, to be come from
After the level change of hardware connection, it is converted to close off output state from output enabled state, stops the power supply to heater 40, makes
The temperature for obtaining heater 40 will not continue to increase, to realize the purpose of overheat protector.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (3)
1. a kind of over-temperature protection device of program-controlled temperature control system, it is characterised in that: including single-chip microcontroller (10), digital temperature sensor
(20), heater driver (30) and heater (40), the heater driver (30) is electrically connected with the heater (40), described
The enable end of heater driver (30) and the trigger output end of the digital temperature sensor (20) are electrically connected to each other, the heating
The control signal of driver (30) is electrically connected with the IO control port of the single-chip microcontroller (10), the number of the single-chip microcontroller (10)
Bus interface is connect with the digital bus interface of the digital temperature sensor (20).
2. a kind of over-temperature protection device of program-controlled temperature control system according to claim 1, it is characterised in that: the single-chip microcontroller
(10) it is connect with the digital temperature sensor (20) by the mutual signal of data/address bus 1, the single-chip microcontroller (10) passes through data
Bus 2 is connect with the heater driver (30) signal, and the digital temperature sensor (20) is added by hardware connection 1 with described
The connection of hot driver (30) signal, the heater driver (30) are connect by hardware connection 2 with the heater (40) signal.
3. a kind of over-temperature protection device of program-controlled temperature control system according to claim 1, it is characterised in that: the single-chip microcontroller
(10) overheat protector threshold value is written in the memory of the digital temperature sensor (20) by the data/address bus 1, later
Even if the single-chip microcontroller (10) breaks down or communication failure, the digital temperature sensor (20) remains in temperature be more than setting
Heater driver is triggered when threshold value stops heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910640098.XA CN110311356A (en) | 2019-07-16 | 2019-07-16 | A kind of over-temperature protection device of program-controlled temperature control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910640098.XA CN110311356A (en) | 2019-07-16 | 2019-07-16 | A kind of over-temperature protection device of program-controlled temperature control system |
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| Publication Number | Publication Date |
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| CN110311356A true CN110311356A (en) | 2019-10-08 |
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| CN201910640098.XA Pending CN110311356A (en) | 2019-07-16 | 2019-07-16 | A kind of over-temperature protection device of program-controlled temperature control system |
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Citations (6)
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|---|---|---|---|---|
| CN201673418U (en) * | 2010-06-13 | 2010-12-15 | 唐山晶源裕丰电子股份有限公司 | Controller capable of accurately setting the constant temperature point of constant temperature tank of constant temperature crystal oscillator from outside |
| CN202393522U (en) * | 2012-01-04 | 2012-08-22 | 安徽理工大学 | Digital temperature sensor |
| CN103234276A (en) * | 2013-04-29 | 2013-08-07 | 王金波 | Control device of domestic intelligent electric control fan heater |
| CN105676908A (en) * | 2014-11-20 | 2016-06-15 | 陕西亚泰电器科技有限公司 | Infant incubator temperature control system |
| CN207248369U (en) * | 2017-09-18 | 2018-04-17 | 贵州航天天马机电科技有限公司 | A kind of radio-frequency power amplifier temperature sensing circuit |
| CN208849444U (en) * | 2018-11-02 | 2019-05-10 | 北京经纬恒润科技有限公司 | A kind of thermal-shutdown circuit |
-
2019
- 2019-07-16 CN CN201910640098.XA patent/CN110311356A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201673418U (en) * | 2010-06-13 | 2010-12-15 | 唐山晶源裕丰电子股份有限公司 | Controller capable of accurately setting the constant temperature point of constant temperature tank of constant temperature crystal oscillator from outside |
| CN202393522U (en) * | 2012-01-04 | 2012-08-22 | 安徽理工大学 | Digital temperature sensor |
| CN103234276A (en) * | 2013-04-29 | 2013-08-07 | 王金波 | Control device of domestic intelligent electric control fan heater |
| CN105676908A (en) * | 2014-11-20 | 2016-06-15 | 陕西亚泰电器科技有限公司 | Infant incubator temperature control system |
| CN207248369U (en) * | 2017-09-18 | 2018-04-17 | 贵州航天天马机电科技有限公司 | A kind of radio-frequency power amplifier temperature sensing circuit |
| CN208849444U (en) * | 2018-11-02 | 2019-05-10 | 北京经纬恒润科技有限公司 | A kind of thermal-shutdown circuit |
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Application publication date: 20191008 |