CN105700584A - Temperature control circuit and temperature control method for hot knife mechanism - Google Patents
Temperature control circuit and temperature control method for hot knife mechanism Download PDFInfo
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- CN105700584A CN105700584A CN201410695708.3A CN201410695708A CN105700584A CN 105700584 A CN105700584 A CN 105700584A CN 201410695708 A CN201410695708 A CN 201410695708A CN 105700584 A CN105700584 A CN 105700584A
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Abstract
The invention relates to a temperature control circuit for a hot knife mechanism, comprising a common-mode choke coil, a DC/DC power module, a MOS tube, an MCU, a voltage and current sampling circuit, an open-collector NAND gate, and an electric heating element. The input end of the common-mode choke coil is used for connecting a bus of an external power supply, and the output end is connected with the input end of the DC/DC power module. The positive output end of the DC/DC power module is connected with the drain of the MOS tube. The gate of the MOS tube is connected with the MCU. The electric heating element is connected between the source of the MOS tube and the negative output end of the DC/DC power module. The negative output end of the DC/DC power module is connected with the MCU through the voltage and current sampling circuit. The MCU is connected with a principal computer through the open-collector NAND gate. The temperature of the electric heating element is controlled through a closed-loop control algorithm according to the linear proportion relationship between resistance and temperature. According to the invention, a hot wire blade works in a constant-power mode, the resistance of the hot wire blade is controlled by adjusting the voltage and current of the hot wire blade, and therefore, the temperature of the hot wide blade is controlled.
Description
Technical field
The present invention relates to a kind of temperature control circuit with temperature control and condition monitoring function and Temp. control method thereof, can be applicable to the temperature of all kinds of hot cutter mechanism and control。
Background technology
Hot cutter is that main uses is for cutting the cutter of object after heating: cutting cable insulation, strikes off other object needing high temperature just can strike off, cutting braid over braid etc.。At present, existing hot cutter mechanism, for instance, " the fervent cutter of CN201320642944.X " and " locking separation device that CN201020158354.6 hot cutter drives ", all without the function of monitoring temperature, will keep the temperature of the edge of a knife, it is necessary for strengthening the use power of hot pin, causes energy loss。In addition, blade many employings copper of existing hot cutter or copper alloy, such as, " the hot cutter of CN201110049274.6 wax engraving machine fast changeable cutter head ", its resistance is little with variations in temperature relation, it is impossible to utilize the resistance of heated filament blade to extrapolate the temperature of blade, it is therefore desirable to additionally to add temperature sensor, can be only achieved the effect of Temperature Feedback, increase production cost。
Summary of the invention
In order to overcome the deficiencies in the prior art, it is an object of the invention to provide the temperature control circuit of a kind of hot cutter mechanism。
The present invention is the technical scheme is that a kind of temperature control circuit for hot cutter mechanism for achieving the above object, including common mode choke, DC/DC power module, metal-oxide-semiconductor, MCU, voltage and current Acquisition Circuit, OC door and heating；
The input of described common mode choke is for accessing the BUS bus of external power source, and outfan is connected with DC/DC power module input；The positive output end of DC/DC power module is connected with the drain electrode of metal-oxide-semiconductor；The gate pole of metal-oxide-semiconductor is connected with MCU, is connected with heating between the negative output terminal of source electrode and DC/DC power module；The negative output terminal of described DC/DC power module is connected with MCU through voltage and current Acquisition Circuit；Described MCU is connected with host computer through OC door。
Electrothermal conductor in described heating adopts resistance and temperature to be the metals of linear ratio relation。
A kind of Temp. control method for hot cutter mechanism, comprises the following steps:
MCU receives the heating voltage and current of voltage and current Acquisition Circuit feedback, linear ratio relation according to resistance and temperature passes through closed loop control algorithm output pwm signal, metal-oxide-semiconductor controls the electric current of heating according to pwm signal, it is achieved the temperature of heating controls。
The described linear ratio relation according to resistance and temperature is comprised the following steps by closed loop control algorithm output pwm signal:
The voltage that voltage and current Acquisition Circuit is fed back by MCU and electric current are divided by, the value of gained obtains temperature value according to the linear ratio relation of resistance and temperature, the Temperature Feedback value that this temperature value controls closed loop as temperature is compared with the preferred temperature set, the difference of gained controls the reference input of closed loop after PI control algolithm as electric current, voltage and current Acquisition Circuit feedback electric current as electric current control closed loop current feedback values, the two compare after difference output pwm signal after PI control algolithm。
The invention have the advantages that and advantage:
1. the heated filament blade work of the present invention is at constant power-mode, by regulating the voltage and current of heated filament blade, controls the resistance of heated filament blade, thus reaching to control the purpose of heated filament blade temperature。
2. the heated filament blade electrothermal conductor of the present invention need to adopt temperature and resistance to have the material determining relation, for instance platinum resistance and tungsten resistance, its resistance and temperature are linear ratio relations。Extrapolate the temperature of heated filament blade by measuring heated filament blade resistance value, play the effect of temperature control feedback。
3. the work process of control circuit of the present invention by controlling and can monitor bus marco, and has high-order controller interface to provide logic control, has fault detect and feedback function。
4. the MCU of the present invention receives the heating voltage and current of voltage and current Acquisition Circuit feedback, linear ratio relation according to resistance and temperature passes through closed loop control algorithm output pwm signal, metal-oxide-semiconductor controls the electric current of heating according to pwm signal, it is achieved the temperature of heating controls。
Accompanying drawing explanation
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 slide blocks, 5 connecting rods, 6 holding screws, 7 electrodes, 8 heatings。
Fig. 5 is temperature control algorithm block diagram。
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail。
As it is shown in figure 1, whole system is made up of power supply, control circuit and blade body。As shown in Figure 4, blade body is mainly made up of end cap 1, spring 2, blade 3, slide block 4, connecting rod 5, holding screw 6, electrode 7 and heating 8。Wherein, end cap 1 is connected with the left end of spring 2；The right-hand member of spring 2 is connected with the left end of slide block 4；Slide block 4 is arranged in the cavity of blade 3；The right-hand member of slide block 4 is connected with connecting rod 5 left end, and connecting rod 5 and electrode 7 left end are connected by directly inserting people's formula, then fix with holding screw, and opposite thread connects。The right-hand member of electrode 7 is connected with heating 8。
The temperature control circuit of hot cutter is as shown in Figure 2。Temperature control circuit is made up of 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 door) and heating。Power bus is connected with common mode choke, then connects a DC/DC power module again。The drain of the positive output termination MOSFET of DC/DC power module, negative output termination heated filament blade。The filtered device filtering of such external power supply, after DC/DC changer, is converted into hot cutter and drives power supply, and output is to the hot cutter in each road。The gate pole of MOSFET connects microprocessor, and source electrode is connected with heated filament blade。Negative output terminal at DC/DC power module is connected with voltage collection circuit, current collection circuit feeds back to microprocessor, microprocessor can monitor running voltage and the operating current of heated filament blade by voltage x current Acquisition Circuit, and have high-order controller interface to provide logic control, also have fault detect and feedback function。
The electrothermal conductor of heated filament blade need to adopt temperature and resistance to have the material determining relation, for instance platinum resistance, tungsten resistance etc.。The resistance of platinum and temperature are linear ratio relations。The resistance of tungsten raises with temperature and increases, and temperature raises 1 DEG C of resistance and about increases 5/1000ths。Heated filament blade work, at constant power-mode, by regulating the voltage and current of heated filament blade, controls the resistance of heated filament blade, thus reaching to control the purpose of heated filament blade temperature。
One example of hot cutter blade is shown in Fig. 3。The operating temperature of hot cutter is 1000 ± 100 DEG C。The heating of hot cutter adopts heating, and this thermal source adopts HTCC heating, and the upper and lower surface at aluminium oxide ceramics green compact installs heater strip, the electric heating piece being integrally forming。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 adopts platinum resistance thin film。By vacuum-deposited thin film technique, platinum being sputtered on a ceramic substrate, thickness, within 2 microns, with glass sintering material fixing for Ni (or Pd) lead-in wire, makes thin-film component through laser resistor trimming。Platinum resistance has the advantages such as anti-vibration, good stability, accuracy be high, high pressure resistant。Resistance value varies with temperature and changes, and extrapolates the temperature of conductor by measuring its resistance value, it is possible to play the effect of temperature control feedback。
The fusing point of platinum is 1773 DEG C, it is possible to the normal operation when 1000 DEG C。When 0 DEG C, the resistivity of platinum is 9.8 × 10-8Ω m, temperature coefficient is 3736ppm/ DEG C。Design heating wire resistance 8 Ω, heating wire resistance 32 Ω when 1000 DEG C when 0 DEG C。Making platinum resistance thin film thickness is 1.8um, and width is 0.2mm, then can obtain heating wire equivalent length l and be:
Formula 1
In formula, ρ is resistivity；R0℃Heating wire resistance when being 0 DEG C；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℃Heating wire resistance when being 1000 DEG C；A is temperature coefficient。
As it is shown in figure 5, temperature control algorithm is by electric current loop (internal ring), temperature ring (outer shroud) realizes。The input reference of temperature ring is preferred temperature, and value of feedback is obtained by temperature, resistive linearity proportionate relationship。The resistance of heating is obtained divided by the electric current of current measurement circuit by the voltage of tension measuring circuit。Temperature Feedback value compares with the preferred temperature set, and the difference of gained controls the reference input of closed loop after PI control algolithm as electric current。Electric current controls the electric current that current feedback values is current collection circuit of closed loop。Current feedback values with expectation current value ratio relatively after difference output pwm signal after PI control algolithm, then control the electric current of heating。
Claims (4)
1. the temperature control circuit for hot cutter mechanism, it is characterised in that: include common mode choke, DC/DC power module, metal-oxide-semiconductor, MCU, voltage and current Acquisition Circuit, OC door and heating；
The input of described common mode choke is for accessing the BUS bus of external power source, and outfan is connected with DC/DC power module input；The positive output end of DC/DC power module is connected with the drain electrode of metal-oxide-semiconductor；The gate pole of metal-oxide-semiconductor is connected with MCU, is connected with heating between the negative output terminal of source electrode and DC/DC power module；The negative output terminal of described DC/DC power module is connected with MCU through voltage and current Acquisition Circuit；Described MCU is connected with host computer through OC door。
2. a kind of temperature control circuit for hot cutter mechanism according to claim 1, it is characterised in that electrothermal conductor in described heating adopts resistance and temperature to be the metals of linear ratio relation。
3. the Temp. control method for hot cutter mechanism, it is characterised in that comprise the following steps:
MCU receives the heating voltage and current of voltage and current Acquisition Circuit feedback, linear ratio relation according to resistance and temperature passes through closed loop control algorithm output pwm signal, metal-oxide-semiconductor controls the electric current of heating according to pwm signal, it is achieved the temperature of heating controls。
4. a kind of Temp. control method for hot cutter mechanism according to claim 3, it is characterised in that the described linear ratio relation according to resistance and temperature is comprised the following steps by closed loop control algorithm output pwm signal:
The voltage that voltage and current Acquisition Circuit is fed back by MCU and electric current are divided by, the value of gained obtains temperature value according to the linear ratio relation of resistance and temperature, the Temperature Feedback value that this temperature value controls closed loop as temperature is compared with the preferred temperature set, the difference of gained controls the reference input of closed loop after PI control algolithm as electric current, voltage and current Acquisition Circuit feedback electric current as electric current control closed loop current feedback values, the two compare after difference output pwm signal after PI control algolithm。
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| CN201410695708.3A CN105700584B (en) | 2014-11-26 | 2014-11-26 | A kind of temperature control circuit and its method for hot cutter mechanism |
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| CN201410695708.3A CN105700584B (en) | 2014-11-26 | 2014-11-26 | A kind of temperature control circuit and its method for hot cutter mechanism |
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| CN105700584B CN105700584B (en) | 2017-11-21 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106711551A (en) * | 2016-12-28 | 2017-05-24 | 北京新能源汽车股份有限公司 | Heating monitoring device of battery and method and battery system |
| 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 |
| CN108200668A (en) * | 2017-12-06 | 2018-06-22 | 珠海格力电器股份有限公司 | Control method, device, storage medium and the processor of electric heater |
| CN109249461A (en) * | 2018-10-25 | 2019-01-22 | 重庆大学 | A kind of hot cutter auto cleaning system of primacord cutting |
| 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 |
| CN111294989A (en) * | 2020-03-17 | 2020-06-16 | 无锡雷利电子控制技术有限公司 | Control method for multi-branch PTC heater |
| 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 |
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 |
Cited By (10)
| 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 |
| CN106711551A (en) * | 2016-12-28 | 2017-05-24 | 北京新能源汽车股份有限公司 | Heating monitoring device of battery and method and battery system |
| 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 |
| CN108200668A (en) * | 2017-12-06 | 2018-06-22 | 珠海格力电器股份有限公司 | Control method, device, storage medium and the processor of electric heater |
| 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 |
| CN109249461A (en) * | 2018-10-25 | 2019-01-22 | 重庆大学 | A kind of hot cutter auto cleaning system of primacord cutting |
| 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 |
| CN111294989A (en) * | 2020-03-17 | 2020-06-16 | 无锡雷利电子控制技术有限公司 | Control method for multi-branch PTC heater |
| 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 |
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| CN105700584B (en) | 2017-11-21 |
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