CN204256556U - A kind of multi-channel temperature control system - Google Patents
A kind of multi-channel temperature control system Download PDFInfo
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- CN204256556U CN204256556U CN201420737354.XU CN201420737354U CN204256556U CN 204256556 U CN204256556 U CN 204256556U CN 201420737354 U CN201420737354 U CN 201420737354U CN 204256556 U CN204256556 U CN 204256556U
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Abstract
The utility model discloses a kind of multi-channel temperature control system, comprising: multiplex temperature collection circuit, multichannel heater circuit, spi bus, data bus, microcontroller circuit, it is connected by spi bus and multiplex temperature collection circuit, and carries out information transmission and control to multiplex temperature collection circuit; Micro-control circuit is connected by data bus and multichannel heater circuit, and carries out information transmission and control to multichannel heater circuit; The utility model is by using high speed MCU, adopt spi bus technology, temperature reading speed is fast, precision is high, by control algolithm burning in MCU, realize the requirement of gas chromatograph multi-channel temperature control, and every road temperature controls independent operating, by inputting the temperature controlled desired value in each road, system runs according to the desired value arranged the automatic control realizing temperature automatically, avoid the complicacy of original design proposal or method further, make it easier more in design, cost is lower and installation and maintenance are more convenient.
Description
Technical field
The utility model relates to chromatogram detecting instrument field, specifically, relates to a kind of gas chromatograph multi-channel temperature control.
Background technology
The temperature control system implementation of gas chromatograph has various ways, early stage outsourcing Temperature control module design, and the control assembly that respectively needs being installed on instrument by the temperature controller of outsourcing realizes the temperature control of injection port, detecting device, post case.Along with development singlechip technology universal of science and technology, injector temperature controls, detector temperature controls, the control of post case temperature etc., all realize single-chip microcomputer and AD gathers, solid-state relay circuit adds control algolithm and forms closed loop and realize temperature control.Existing market major temperature controls main satisfied three tunnel temperature and controls, not yet there is the multi-channel temperature control demand needing to solve, also not yet there is corresponding multi-channel temperature control system or device, if according to the current mode that relates to or method, then need to increase extra control circuit unit to realize, thus the complicacy of design proposal and the cost of Geng Gao must be increased, installation and maintenance are also more numerous and diverse, therefore be necessary in the temperature controlled situation increasing more multichannel, avoid the complicacy of original design proposal or method, make it easier more in design, cost is lower and installation and maintenance are more convenient.
Utility model content
In view of this, need to overcome at least one in above-mentioned defect of the prior art.The utility model provides a kind of multi-channel temperature control system, comprising:
Multiplex temperature collection circuit, described multiplex temperature collection circuit comprises injector temperature Acquisition Circuit, detector temperature Acquisition Circuit, post case temperature collection circuit;
Multichannel heater circuit, described multichannel heater circuit comprises injector temperature heater circuit, detector temperature heater circuit, post case heating temperatures circuit;
Spi bus;
Data bus;
Microcontroller circuit, described micro-control circuit is connected by described spi bus and described multiplex temperature collection circuit, and carries out information transmission and control to described multiplex temperature collection circuit; Described micro-control circuit is connected by described data bus and described multichannel heater circuit, and carries out information transmission and control to described multichannel heater circuit;
Described multi-channel temperature control system realizes the temperature acquisition of modulus conversion chip in described multiplex temperature collection circuit and thermal resistance circuit realiration multichannel by the timing variations of described microcontroller circuit; The temperature target that reaches needed for the temperature of temperature required for the correspondence collected control module and its is provided the pwm waveform needed for control by described microcontroller circuit after pid algorithm and the associative operation of empirical model algorithm, described microcontroller circuit exports according to the Control timing sequence of correspondence the heater block quantity of heat given up that PWM drives the described temperature control unit in described multichannel heater circuit, realizes the automatic control of multi way temperature;
Described multi-channel temperature control system is the temperature control system being more than or equal to five tunnels.
According in the utility model background technology to described in prior art, the temperature of this area controls main satisfied three tunnel temperature and controls, not yet there is the multi-channel temperature control demand needing to solve, also not yet there is corresponding multi-channel temperature control system or device, if according to the current mode that relates to or method, then need to increase extra control circuit unit to realize, thus must increase the complicacy of design proposal and the cost of Geng Gao, installation and maintenance are also more numerous and diverse, and the multi-channel temperature control system that the utility model provides, by using high speed MCU, adopt spi bus technology, not only temperature reading speed is fast, precision is high, and the control algolithm burning of Systematical control is in MCU, achieve the requirement of gas chromatograph multi-channel temperature control, and every road temperature controls independent operating, by inputting the temperature controlled desired value in each road, system runs according to the desired value arranged the automatic control realizing temperature automatically, avoid the complicacy of original design proposal or method further, make it easier more in design, cost is lower and installation and maintenance are more convenient.
In addition, disclosed in the utility model, multi-channel temperature control system also has following additional technical feature:
Further, described multi-channel temperature control system is five tunnel temperature control systems, and described modulus conversion chip is 24 modulus conversion chips.
Further, described five road temperature collection circuits comprise four ports, 24 modulus conversion chips, single port 24 modulus conversion chips, injector temperature Acquisition Circuit, detector temperature Acquisition Circuit, post case temperature collection circuit, described four ports, 24 modulus conversion chip one end connect described spi bus, the other end connects described injector temperature Acquisition Circuit, described detector temperature Acquisition Circuit, described single port 24 modulus conversion chip one end connect described spi bus, and the other end connects described post case temperature-control circuit.
Preferably, described injector temperature Acquisition Circuit, described detector temperature Acquisition Circuit, described post case temperature collection circuit adopt Pt100 resistance and temperature Acquisition Circuit.
Further, described thermal resistance circuit is Pt100 platinum resistance circuit.
Further, described microcontroller circuit comprises power supply and controls MCU chip, described control MCU carries out temperature acquisition coordination, PID arithmetic and multiplex PWM waves and produces, described control MCU was divided into many parts 1 second, defining many parts is n, be then that the magnitude of voltage that described multiplex temperature collection circuit that intervening sequences circle collection and injection port, detecting device and post case are connected is formed realizes temperature acquisition with every (1000/n) millisecond, give described multichannel heater circuit the PWM waveform Sequential output obtained through PID arithmetic simultaneously, realize the control of five tunnel temperature.
Further, described multichannel heater circuit is exported by the heat driving the break-make of corresponding multiple solid-state relays to realize multiple injection port, multiple detecting device and post case multichannel heater block respectively from the multi-channel PWM of the data bus of described microcontroller circuit, and described multi-channel PWM is identical with the quantity of described multiple solid-state relay.
Further, described multichannel heater circuit is No. five heater circuits, and described No. five heater circuits are exported by the heat driving the break-make of five corresponding solid-state relays to realize five heater blocks of two injection ports, two detecting devices and a post case respectively from five road PWM of the data bus of described microcontroller circuit.
The aspect that the utility model is additional and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is an embodiment five tunnel temperature control system schematic diagram of the present utility model;
Fig. 2 is an embodiment five road temperature collection circuit schematic diagram of the present utility model;
Fig. 3 is embodiment No. five heater circuit schematic diagram of the present utility model;
Wherein, 1. spi bus, 2. data bus, PT1. solid-state relay 1, PT2. solid-state relay 2, PT3. solid-state relay 3, PT4. solid-state relay 4, PT5. solid-state relay 5, J1. AC220 power supply, J2. post case heater block, J3. injection port 1 heater block, J4. injection port 2 heater block, J5. detect mouth 1 heater block, J6. detects mouth 2 heater block.
Embodiment
Embodiment described below is exemplary, only for explaining the utility model, and can not be interpreted as restriction of the present utility model.
Describe multi-channel temperature control system of the present utility model below with reference to accompanying drawings, wherein Fig. 1 is an embodiment five tunnel temperature control system schematic diagram of the present utility model; Fig. 2 is an embodiment five road temperature collection circuit schematic diagram of the present utility model; Fig. 3 is embodiment No. five heater circuit schematic diagram of the present utility model.
According to embodiment of the present utility model, as shown in Figure 1, the multi-channel temperature control system that the utility model provides, comprising:
Multiplex temperature collection circuit, described multiplex temperature collection circuit comprises injector temperature Acquisition Circuit, detector temperature Acquisition Circuit, post case temperature collection circuit, Fig. 1 Zhong Wei five road temperature collection circuit;
Multichannel heater circuit, described multichannel heater circuit comprises injector temperature heater circuit, detector temperature heater circuit, post case heating temperatures circuit, Fig. 1 Zhong Wei No. five heater circuit;
Spi bus 1;
Data bus 2;
Microcontroller circuit, described micro-control circuit is connected with described multiplex temperature collection circuit (Fig. 1 Zhong Wei five road temperature collection circuit) by described spi bus 1, and information transmission and control are carried out to described multiplex temperature collection circuit (Fig. 1 Zhong Wei five road temperature collection circuit); Described micro-control circuit is connected with described multichannel heater circuit (Fig. 1 Zhong Wei No. five heater circuit) by described data bus 2, and carries out information transmission and control to described multichannel heater circuit (Fig. 1 Zhong Wei No. five heater circuit);
Described multi-channel temperature control system realizes the temperature acquisition of modulus conversion chip in described multiplex temperature collection circuit and thermal resistance circuit realiration multichannel by the timing variations of described microcontroller circuit; The temperature target that reaches needed for the temperature of temperature required for the correspondence collected control module and its is provided the pwm waveform needed for control by described microcontroller circuit after pid algorithm and the associative operation of empirical model algorithm, described microcontroller circuit exports according to the Control timing sequence of correspondence the heater block quantity of heat given up that PWM drives the described temperature control unit in described multichannel heater circuit, realizes the automatic control of multi way temperature;
Described multi-channel temperature control system is the temperature control system being more than or equal to five tunnels.
According to an embodiment of the present utility model, described multi-channel temperature control system is five tunnel temperature control systems, and described modulus conversion chip is 24 modulus conversion chips, as Figure 1-3.
Further, described five road temperature collection circuits comprise four ports, 24 modulus conversion chips, single port 24 modulus conversion chips, injector temperature Acquisition Circuit, detector temperature Acquisition Circuit, post case temperature collection circuit, described four ports, 24 modulus conversion chip one end connect described spi bus, the other end connects described injector temperature Acquisition Circuit, described detector temperature Acquisition Circuit, described single port 24 modulus conversion chip one end connect described spi bus, the other end connects described post case temperature-control circuit, as shown in Figure 2;
Preferably, described injector temperature Acquisition Circuit, described detector temperature Acquisition Circuit, described post case temperature collection circuit adopt Pt100 resistance and temperature Acquisition Circuit, as shown in Figure 2.
By using the temperature (thief hatch, detecting device and post case temperature) of PT100 thermal resistance collection corresponding port, through corresponding modulus conversion chip, data being passed to described microcontroller circuit by spi bus and processes.
According to embodiments more of the present utility model, described thermal resistance circuit is Pt100 platinum resistance circuit.
According to embodiments more of the present utility model, described microcontroller circuit comprises power supply and controls MCU chip, described control MCU carries out temperature acquisition coordination, PID arithmetic and multiplex PWM waves produce, described control MCU was divided into many parts 1 second, defining many parts is n, be then intervening sequences circle collection and injection port with every (1000/n) millisecond, the magnitude of voltage that the described multiplex temperature collection circuit that detecting device and post case are connected is formed realizes temperature acquisition, give described multichannel heater circuit the PWM waveform Sequential output obtained through PID arithmetic simultaneously, realize the control of multi way temperature, as shown in Figure 2.
According to embodiments more of the present utility model, described multichannel heater circuit is exported by the heat driving the break-make of corresponding multiple solid-state relays to realize multiple injection port, multiple detecting device and post case multichannel heater block respectively from the multi-channel PWM of the data bus of described microcontroller circuit, described multi-channel PWM is identical with the quantity of described multiple solid-state relay, as shown in Figure 3.
As shown in Figure 3, pass through the analyzing and processing of gathered temperature, microcontroller circuit exports the break-make that control signal controls solid-state relay (PT1-PT5 as in Fig. 3), to carry out computer heating control to corresponding heater block (J2-J6 as in Fig. 3) by respective transmissions approach (MCU_I/O_COLH, MCU_I/O_INJ1H, MCU_I/O_DET1H etc. as in Fig. 3).
According to an embodiment of the present utility model, described multichannel heater circuit is No. five heater circuits, described No. five heater circuits are exported by the heat driving the break-make of five corresponding solid-state relays to realize five heater blocks of two injection ports, two detecting devices and a post case respectively from five road PWM of the data bus of described microcontroller circuit, as shown in Figure 3.
Although be described in detail embodiment of the present utility model with reference to multiple illustrative examples of the present utility model, but it must be understood that, those skilled in the art can design multiple other improvement and embodiment, these improve and embodiment by drop on the utility model principle spirit and scope within.Specifically, within the scope of aforementioned open, accompanying drawing and claim, rational modification and improvement can be made in the layout of parts and/or sub-combination layout, and spirit of the present utility model can not be departed from.Except modification and the improvement of parts and/or layout aspect, its scope is by claims and equivalents thereof.
Claims (8)
1. a multi-channel temperature control system, is characterized in that, comprising:
Multiplex temperature collection circuit, described multiplex temperature collection circuit comprises injector temperature Acquisition Circuit, detector temperature Acquisition Circuit, post case temperature collection circuit;
Multichannel heater circuit, described multichannel heater circuit comprises injector temperature heater circuit, detector temperature heater circuit, post case heating temperatures circuit;
Spi bus;
Data bus;
Microcontroller circuit, described micro-control circuit is connected by described spi bus and described multiplex temperature collection circuit, and carries out information transmission and control to described multiplex temperature collection circuit; Described micro-control circuit is connected by described data bus and described multichannel heater circuit, and carries out information transmission and control to described multichannel heater circuit;
Described multi-channel temperature control system is the temperature control system being more than or equal to five tunnels.
2. multi-channel temperature control system according to claim 1, is characterized in that, described multi-channel temperature control system is five tunnel temperature control systems, and modulus conversion chip is 24 modulus conversion chips.
3. multi-channel temperature control system according to claim 2, it is characterized in that, described five road temperature collection circuits comprise four ports, 24 modulus conversion chips, single port 24 modulus conversion chips, injector temperature Acquisition Circuit, detector temperature Acquisition Circuit, post case temperature collection circuit, described four ports, 24 modulus conversion chip one end connect described spi bus, the other end connects described injector temperature Acquisition Circuit, described detector temperature Acquisition Circuit, described single port 24 modulus conversion chip one end connect described spi bus, the other end connects described post case temperature-control circuit.
4. multi-channel temperature control system according to claim 3, is characterized in that, described injector temperature Acquisition Circuit, described detector temperature Acquisition Circuit, described post case temperature collection circuit adopt Pt100 resistance and temperature Acquisition Circuit.
5. multi-channel temperature control system according to claim 1, is characterized in that, described thermal resistance circuit is Pt100 platinum resistance circuit.
6. multi-channel temperature control system according to claim 1, it is characterized in that, described microcontroller circuit comprises power supply and controls MCU chip, described control MCU carries out temperature acquisition coordination, PID arithmetic and multiplex PWM waves produce, described control MCU was divided into many parts 1 second, defining many parts is n, then with every 1000/n millisecond for intervening sequences circle collection and injection port, the magnitude of voltage that the described multiplex temperature collection circuit that detecting device and post case are connected is formed realizes temperature acquisition, give described multichannel heater circuit the PWM waveform Sequential output obtained through PID arithmetic simultaneously, realize the control of five tunnel temperature.
7. multi-channel temperature control system according to claim 1, it is characterized in that, described multichannel heater circuit is exported by the heat driving the break-make of corresponding multiple solid-state relays to realize multiple injection port, multiple detecting device and post case multichannel heater block respectively from the multi-channel PWM of the data bus of described microcontroller circuit, and described multi-channel PWM is identical with the quantity of described multiple solid-state relay.
8. multi-channel temperature control system according to claim 7, it is characterized in that, described multichannel heater circuit is No. five heater circuits, and described No. five heater circuits are exported by the heat driving the break-make of five corresponding solid-state relays to realize five heater blocks of two injection ports, two detecting devices and a post case respectively from five road PWM of the data bus of described microcontroller circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420737354.XU CN204256556U (en) | 2014-12-01 | 2014-12-01 | A kind of multi-channel temperature control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420737354.XU CN204256556U (en) | 2014-12-01 | 2014-12-01 | A kind of multi-channel temperature control system |
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| CN204256556U true CN204256556U (en) | 2015-04-08 |
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| CN201420737354.XU Expired - Fee Related CN204256556U (en) | 2014-12-01 | 2014-12-01 | A kind of multi-channel temperature control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104375535A (en) * | 2014-12-01 | 2015-02-25 | 江苏天瑞仪器股份有限公司 | Multi-channel temperature control system |
| CN105929870A (en) * | 2016-07-15 | 2016-09-07 | 江苏天瑞仪器股份有限公司 | Novel light chamber constant-temperature system |
-
2014
- 2014-12-01 CN CN201420737354.XU patent/CN204256556U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104375535A (en) * | 2014-12-01 | 2015-02-25 | 江苏天瑞仪器股份有限公司 | Multi-channel temperature control system |
| CN104375535B (en) * | 2014-12-01 | 2017-06-06 | 江苏天瑞仪器股份有限公司 | A kind of multi-channel temperature control system |
| CN105929870A (en) * | 2016-07-15 | 2016-09-07 | 江苏天瑞仪器股份有限公司 | Novel light chamber constant-temperature system |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20171201 |
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| CF01 | Termination of patent right due to non-payment of annual fee |