CN105700584B - A kind of temperature control circuit and its method for hot cutter mechanism - Google Patents
A kind of temperature control circuit and its method for hot cutter mechanism Download PDFInfo
- Publication number
- CN105700584B CN105700584B CN201410695708.3A CN201410695708A CN105700584B CN 105700584 B CN105700584 B CN 105700584B CN 201410695708 A CN201410695708 A CN 201410695708A CN 105700584 B CN105700584 B CN 105700584B
- Authority
- CN
- China
- Prior art keywords
- temperature
- current
- mcu
- voltage
- electric heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The present invention relates to a kind of temperature control circuit for hot cutter mechanism, including common mode choke, DC/DC power modules, metal-oxide-semiconductor, MCU, voltage and current Acquisition Circuit, open collector NAND gate and electric heating element；The input of the common mode choke is used for the BUS buses for accessing external power source, and output end is connected with DC/DC power module inputs；The drain electrode of the positive output end and metal-oxide-semiconductor of DC/DC power modules connects；The gate pole of metal-oxide-semiconductor is connected with MCU, and electric heating element is connected between the negative output terminal of source electrode and DC/DC power modules；The negative output terminal of the DC/DC power modules is connected through voltage and current Acquisition Circuit with MCU；The MCU is connected through open collector NAND gate with host computer.Method is to realize the temperature control of electric heating element by closed loop control algorithm according to the linear ratio relation of resistance and temperature.The heated filament blade work of the present invention by adjusting the voltage and current of heated filament blade, controls the resistance of heated filament blade in constant power-mode, so as to reach the purpose of control heated filament blade temperature.
Description
Technical field
The present invention relates to a kind of temperature control circuit and its temperature control method with temperature control and condition monitoring function, can apply
In the temperature control of all kinds of hot cutter mechanisms.
Background technology
Hot knife is the knife for being used for cutting object after heating, and main application is：Cable insulation is cut, striking off other needs height
The object that Wen Caineng strikes off, cutting braid over braid etc..At present, existing hot cutter mechanism, for example,《CN201320642944.X is fervent
Cutter》With《A kind of locking separation devices of hot knife driving of CN201020158354.6》, the function all without monitoring temperature, to protect
The temperature of the edge of a knife is held, must just increase hot pin uses power, causes energy loss.In addition, the blade of existing hot knife uses more
Copper or copper alloy, for example,《The hot knife of CN201110049274.6 wax engraving machine fast changeable cutter heads》, its resistance and temperature
Variation relation is little, the resistance of heated filament blade can not be utilized to extrapolate the temperature of blade, it is therefore desirable to additionally to add TEMP
Device, the effect of temperature feedback is can be only achieved, increase production cost.
The content of the invention
For overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of temperature control circuit of hot cutter mechanism.
The used to achieve the above object technical scheme of the present invention is：A kind of temperature control circuit for hot cutter mechanism, bag
Include common mode choke, DC/DC power modules, metal-oxide-semiconductor, MCU, voltage and current Acquisition Circuit, OC doors and electric heating element；
The input of the common mode choke is used for the BUS buses for accessing external power source, output end and DC/DC power modules
Input connects；The drain electrode of the positive output end and metal-oxide-semiconductor of DC/DC power modules connects；The gate pole of metal-oxide-semiconductor is connected with MCU, source electrode
Electric heating element is connected between the negative output terminal of DC/DC power modules；The negative output terminal of the DC/DC power modules through voltage and
Current collection circuit is connected with MCU；The MCU is connected through OC doors with host computer.
Electrothermal conductor in the electric heating element uses resistance and temperature is the metal of linear ratio relation.
A kind of temperature control method for hot cutter mechanism, comprise the following steps：
The electric heating element voltage and current of MCU receiving voltages and current collection circuit feedback, according to the line of resistance and temperature
Sex ratio relation controls the electric current of electric heating element according to pwm signal by closed loop control algorithm output pwm signal, metal-oxide-semiconductor, realizes
The temperature control of electric heating element.
It is described that following step is included by closed loop control algorithm output pwm signal according to the linear ratio relation of resistance and temperature
Suddenly：
The voltage that voltage and current Acquisition Circuit is fed back and electric current are divided by by MCU, and the value of gained is according to resistance and temperature
Linear ratio relation obtains temperature value, using temperature feedback value of the temperature value as temperature control closed loop, the expectation temperature with setting
Degree compares, the reference input of the difference of gained after PI control algolithms as current control closed loop, voltage and current Acquisition Circuit
Current feedback values of the electric current of feedback as current control closed loop, the difference after the two compares export PWM after PI control algolithms
Signal.
The invention has the advantages that and advantage：
1. the heated filament blade work of the present invention is in constant power-mode, by adjusting the voltage and current of heated filament blade, control
The resistance of silk blade is heated, so as to reach the purpose of control heated filament blade temperature.
2. the heated filament blade electrothermal conductor of the present invention need to use temperature and resistance has the material of determination relation, such as RTD
With tungsten resistance, its resistance and temperature is linear ratio relation.Heated filament blade is extrapolated by measuring heated filament blade resistance value
Temperature, play the effect of temperature control feedback.
3. the course of work of control circuit of the present invention can be by control and monitoring bus marco, and has high-order controller interface to carry
For logic control, faulty detection and feedback function.
4. the electric heating element voltage and current of MCU receiving voltages and the current collection circuit feedback of the present invention, according to resistance
Electric heating element is controlled according to pwm signal by closed loop control algorithm output pwm signal, metal-oxide-semiconductor with the linear ratio relation of temperature
Electric current, realize the temperature control of electric heating element.
Brief description of the drawings
Fig. 1 is the structural representation of a specific embodiment of temperature control circuit of the present invention；
Fig. 2 is temperature control circuit theory diagram；
Fig. 3 is heated filament distribution schematic diagram on blade；
Fig. 4 is blade body structure chart；
Wherein, 1 end cap, 2 springs, 3 blades, 4 sliding blocks, 5 connecting rods, 6 holding screws, 7 electrodes, 8 electric heating elements.
Fig. 5 is temperature control algorithm block diagram.
Embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention is described in further detail.
As shown in figure 1, whole system is made up of power supply, control circuit and blade body.As shown in figure 4, blade body master
To be made up of end cap 1, spring 2, blade 3, sliding block 4, connecting rod 5, holding screw 6, electrode 7 and electric heating element 8.Wherein, end cap 1
It is connected with the left end of spring 2；The right-hand member of spring 2 is connected with the left end of sliding block 4；Sliding block 4 is located in the cavity of blade 3；Sliding block 4
Right-hand member is connected with the left end of connecting rod 5, and connecting rod 5 is connected with the left end of electrode 7 using directly slotting people's formula, is then consolidated with holding screw
It is fixed, opposite thread connection.The right-hand member of electrode 7 is connected with electric heating element 8.
The temperature control circuit of hot knife is as shown in Figure 2.Temperature control circuit is by common mode choke (KCMT), metal-oxide-semiconductor (MOSFET), DC/
DC power module, voltage and current Acquisition Circuit, Micro-processor MCV, open collector NAND gate (OC doors) and electric heating element group
Into.Power bus is connected with common mode choke, then connects a DC/DC power module again.The positive output end of DC/DC power modules
Connect MOSFET drain, negative output termination heated filament blade.So filtered device filtering of external power supply, after DC/DC converters,
Hot knife driving power is converted into, exports and gives each road hot knife.MOSFET gate pole connection microprocessor, source electrode and heated filament blade phase
Even.The negative output terminal of DC/DC power modules is connected with voltage collection circuit, current collection circuit feeds back to microprocessor, micro- place
Reason device can monitor the operating voltage and operating current of heated filament blade by voltage x current Acquisition Circuit, and have high-order controller interface
Logic control, also fault detect and feedback function are provided.
The electrothermal conductor of heated filament blade need to use temperature and resistance has the material of determination relation, such as RTD, tungsten resistance
Deng.The resistance and temperature of platinum are linear ratio relations.The resistance of tungsten is raised and increased with temperature, and temperature raises 1 DEG C of resistance and about increased
It is big by 5/1000ths.Heated filament blade work by adjusting the voltage and current of heated filament blade, controls heated filament knife in constant power-mode
The resistance of piece, so as to reach the purpose of control heated filament blade temperature.
One example of hot knife blade is shown in Fig. 3.The operating temperature of hot knife is 1000 ± 100 DEG C.Hot knife heating uses electric heating
Element, the thermal source use HTCC electric heating element, install heater strip in the upper and lower surface of aluminium oxide ceramics green compact, turn into
The electric heating piece of one.Backing is fixed in connecting rod by two electrodes, and is that two resistance heating wires in parallel power by electrode.
The electrothermal conductor of this example uses RTD film.Platinum is sputtered at ceramic substrate with vacuum-deposited thin film technique
On, thickness fixes Ni (or Pd) lead within 2 microns, with glass sintering material, and thin-film component is made through laser resistor trimming.Platinum electricity
Resistance has the advantages that anti-vibration, stability is good, the degree of accuracy is high, high pressure resistant.Resistance value is varied with temperature and changed, by measuring it
Resistance value extrapolates the temperature of conductor, can play the effect of temperature control feedback.
The fusing point of platinum be 1773 DEG C, can in the case of 1000 DEG C normal work.At 0 DEG C, the resistivity of platinum is 9.8
×10-8Ω m, temperature coefficient are 3736ppm/ DEG C.The Ω of heating wire resistance 8 during 0 DEG C of design, heating wire resistance 32 at 1000 DEG C
Ω.It is 1.8um, width 0.2mm to make RTD film thickness, then can obtain heating wire equivalent length l and be：
Formula 1
In formula, ρ is resistivity；R0℃For 0 DEG C when heating wire resistance；S is cross-sectional area.
Adjusting 1000 DEG C of resistance is：
R1000℃=R0℃·(t2-t1) a=8 × (1000-0) × 3.74 × 10-3=29.92 Ω formulas 2
In formula, t1、t2For heating wire temperature；R1000℃For 1000 DEG C when heating wire resistance；A is temperature coefficient.
As shown in figure 5, temperature control algorithm is realized by electric current loop (inner ring), temperature ring (outer shroud).The input ginseng of temperature ring
It is preferred temperature to examine value, and value of feedback is obtained by temperature, resistive linearity proportionate relationship.The resistance of electric heating element is by tension measuring circuit
Voltage divided by the electric current of current measurement circuit obtain.Temperature feedback value, compared with the preferred temperature set, the difference of gained warp
Reference input after PI control algolithms as current control closed loop.The current feedback values of current control closed loop are current collection circuit
Electric current.Current feedback values and expectation electric current value relatively after difference after PI control algolithms output pwm signal, then control electricity
The electric current of thermal element.
Claims (3)
- A kind of 1. temperature control circuit for hot cutter mechanism, it is characterised in that：Including common mode choke, DC/DC power modules, MOS Pipe, MCU, voltage and current Acquisition Circuit, OC doors and electric heating element；The input of the common mode choke is used for the BUS buses for accessing external power source, and output end inputs with DC/DC power modules End connection；The drain electrode of the positive output end and metal-oxide-semiconductor of DC/DC power modules connects；The gate pole of metal-oxide-semiconductor is connected with MCU, source electrode with Electric heating element is connected between the negative output terminal of DC/DC power modules；The negative output terminal of the DC/DC power modules is through voltage and electricity Stream Acquisition Circuit is connected with MCU；The MCU is connected through OC doors with host computer.
- 2. a kind of temperature control circuit for hot cutter mechanism according to claim 1, it is characterised in that in the electric heating element Electrothermal conductor using resistance and temperature be linear ratio relation metal.
- 3. a kind of temperature control method for hot cutter mechanism, it is characterised in that comprise the following steps：The electric heating element voltage and current of MCU receiving voltages and current collection circuit feedback, according to resistance and the linear ratio of temperature Example relation controls the electric current of electric heating element according to pwm signal, realizes electric heating by closed loop control algorithm output pwm signal, metal-oxide-semiconductor The temperature control of element；It is described to be comprised the following steps according to the linear ratio relation of resistance and temperature by closed loop control algorithm output pwm signal：The voltage that voltage and current Acquisition Circuit is fed back and electric current are divided by by MCU, and the value of gained is linear according to resistance and temperature Proportionate relationship obtains temperature value, using temperature feedback value of the temperature value as temperature control closed loop, the preferred temperature ratio with setting Compared with reference input of the difference after PI control algolithms as current control closed loop of, gained, voltage and current Acquisition Circuit feedback Current feedback values of the electric current as current control closed loop, the two relatively after difference after PI control algolithms output pwm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410695708.3A CN105700584B (en) | 2014-11-26 | 2014-11-26 | A kind of temperature control circuit and its method for hot cutter mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410695708.3A CN105700584B (en) | 2014-11-26 | 2014-11-26 | A kind of temperature control circuit and its method for hot cutter mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105700584A CN105700584A (en) | 2016-06-22 |
| CN105700584B true CN105700584B (en) | 2017-11-21 |
Family
ID=56295026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410695708.3A Expired - Fee Related CN105700584B (en) | 2014-11-26 | 2014-11-26 | A kind of temperature control circuit and its method for hot cutter mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105700584B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107791310A (en) * | 2016-08-31 | 2018-03-13 | 山东豪迈机械科技股份有限公司 | Tyre tread automatic processing system and its fervent cutter temprature control method and device |
| CN106711551B (en) * | 2016-12-28 | 2019-04-05 | 北京新能源汽车股份有限公司 | Heating monitoring device, method and the battery system of battery |
| CN108200668B (en) * | 2017-12-06 | 2020-01-17 | 珠海格力电器股份有限公司 | Control method and device of electric heater, storage medium and processor |
| CN109249461B (en) * | 2018-10-25 | 2020-05-15 | 重庆大学 | Automatic cleaning system for thermal cutter for cutting detonating cord |
| CN109913803A (en) * | 2019-03-19 | 2019-06-21 | 中国科学院兰州化学物理研究所 | A kind of preparation method patterning the hot component of resistance thin-film electro |
| CN111338403A (en) * | 2020-03-17 | 2020-06-26 | 无锡雷利电子控制技术有限公司 | Control method and control system of PTC heating device |
| CN111294989B (en) * | 2020-03-17 | 2023-03-21 | 无锡雷利电子控制技术有限公司 | Control method for multi-branch PTC heater |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201218919Y (en) * | 2008-06-24 | 2009-04-08 | 中控科技集团有限公司 | Temperature control system of loom edge hot-melting apparatus |
| CN102632753A (en) * | 2011-02-09 | 2012-08-15 | 邢刚 | Hot knife of waxen image engraving machine |
| WO2012150342A1 (en) * | 2011-05-05 | 2012-11-08 | Gr8 Engineering Limited | Apparatus for conditioning preforms and method using it |
| CN203564277U (en) * | 2013-11-17 | 2014-04-30 | 李冰青 | Special scraper for dermatology |
-
2014
- 2014-11-26 CN CN201410695708.3A patent/CN105700584B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201218919Y (en) * | 2008-06-24 | 2009-04-08 | 中控科技集团有限公司 | Temperature control system of loom edge hot-melting apparatus |
| CN102632753A (en) * | 2011-02-09 | 2012-08-15 | 邢刚 | Hot knife of waxen image engraving machine |
| WO2012150342A1 (en) * | 2011-05-05 | 2012-11-08 | Gr8 Engineering Limited | Apparatus for conditioning preforms and method using it |
| CN203564277U (en) * | 2013-11-17 | 2014-04-30 | 李冰青 | Special scraper for dermatology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105700584A (en) | 2016-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105700584B (en) | A kind of temperature control circuit and its method for hot cutter mechanism | |
| CN103278752A (en) | Corona aging acceleration device and method for polymer insulating material | |
| CN104502203A (en) | Testing device for current auxiliary type micro-stretching mechanical property of metal thin plate | |
| CN106300517A (en) | A kind of super capacitor charging method and device | |
| CN202664977U (en) | Intelligent control DC (direct current) low-voltage electric quilt/blanket and intelligent control circuit thereof | |
| CN104332928B (en) | Split conductor economic current anti-icing and deicing method | |
| CN108207041A (en) | A kind of novel hair unkinking device ceramic heating assembly and preparation method thereof | |
| CN101963817B (en) | Constant-temperature heating system | |
| CN107545958A (en) | A kind of method and its device for reducing carbon-based conductive membrane volume resistivity | |
| CN204511732U (en) | A kind of fuel filter electrical heating controller | |
| CN207819188U (en) | A kind of novel distribution network switchgear damp-proof device | |
| CN203707767U (en) | Interface protection circuit of current sensor, control circuit and electric appliance | |
| CN201409236Y (en) | Electric heating glass used for infrared weighing apparatus of highway toll station | |
| CN203679477U (en) | Constant-temperature control circuit for internal heating electric soldering iron | |
| CN203551753U (en) | Portable intelligent constant-current load device | |
| CN107421065A (en) | A kind of air conditioning control device and its control method | |
| CN105629077B (en) | A kind of device and method measuring molten glass conductivity | |
| CN208867074U (en) | A kind of brushless servo electric screw driver | |
| CN202153714U (en) | Annealing voltage regulating direct current control system | |
| CN203012012U (en) | Electric energy meter heating circuit used in low temperature environment | |
| CN103294083B (en) | PTC and NTC double-temperature-control circuit | |
| CN206558601U (en) | A kind of lithium ion battery module with heating module | |
| CN204823092U (en) | Transmission roller device of hobbing press | |
| CN107454683A (en) | A kind of electrical connection device of the curing molding equipment of PTC heater part | |
| CN205092102U (en) | 33 high -power europe resistance cards of temperature resistance trimming |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171121 Termination date: 20191126 |