CN201955645U - Special atmosphere switch and flow intelligent control module based on DTA (Differential Thermal Analysis)/DSC (Differential Scanning Calorimetry) thermal analysis instrument - Google Patents
Special atmosphere switch and flow intelligent control module based on DTA (Differential Thermal Analysis)/DSC (Differential Scanning Calorimetry) thermal analysis instrument Download PDFInfo
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- CN201955645U CN201955645U CN2010206527222U CN201020652722U CN201955645U CN 201955645 U CN201955645 U CN 201955645U CN 2010206527222 U CN2010206527222 U CN 2010206527222U CN 201020652722 U CN201020652722 U CN 201020652722U CN 201955645 U CN201955645 U CN 201955645U
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Abstract
The utility model relates to an atmosphere switch and flow intelligent control module which mainly comprises an atmosphere switch module and a flow control module, wherein, the atmosphere switch module mainly includes an atmosphere switch electromagnetic valve V1 and a gas switch drive circuit. After an upper computer issues a switch command, the command is transferred to an MCU (micro control unit) which converts the signal into a control signal to pass through the drive circuit and an optical coupler and drive the two-position three-way electromagnetic valve to carry out switching, thereby completing the atmosphere switching control. The electromagnetic valve is normally opened and powered by 24V DC electricity, consumes less power, can be switched on or off with small impacts on the gas circuit, and can meet the needs for smooth atmosphere switching. A signal of a flow sensor is transferred to the MCU through a transmission interface, and after the calculation of the digital PID (proportional integral differential) control algorithm, the MCU outputs a control signal to control a proportional valve, thereby adjusting the atmosphere flow output by the proportional valve to the sensor. Through the feedback control loop, the flow control accuracy is greatly increased.
Description
Technical field
The utility model relates to a kind of atmosphere and switches and the flow quantity intelligent control module, and particularly a kind of special-purpose atmosphere based on the DTA/DSC thermal-analysis instrumentation is switched and the flow quantity intelligent control module.
Background technology
In the DTA/DSC thermal-analysis instrumentation; in order to improve the resistance to corrosion of instrument; perhaps need in heating furnace body, feed protective atmosphere or reaction atmosphere in order to observe the response situation of sample in certain atmosphere; and the shape that different atmosphere and atmosphere flow can influence the equilibrium temperature of sample chemical reaction and physical change and go out the peak; so the accurate control of special atmosphere control module realization to the atmosphere flow must be arranged, and gas circuit change-over switch of providing convenience.Many original DTA/DSC thermal-analysis instrumentation atmosphere controls comprise that flow control and gas circuit switching controls all adopt manual mode, suspended body flowmeter is adopted in flow control, flow control accuracy is low, the switching of two-way atmosphere is controlled by the hand switch mode to two pilot solenoid valves, this kind solenoid valve adopts Alternating Current Power Supply, electromagnetic interference (EMI) is big, and response speed is slow, causes the switching stationarity of air-flow poor.
The utility model content
The technical problems to be solved in the utility model provides a kind of special-purpose atmosphere based on the DTA/DSC thermal-analysis instrumentation and switches and the flow quantity intelligent control module, this module adopts microcomputer-based intelligent control, and original air-channel system structure improved, reduced the gas circuit assembly, simplify whole air-channel system, made new atmosphere control module convenient, quick and accurate in the operation of flow control and gas circuit switching.
For solving the problems of the technologies described above, a kind of special-purpose atmosphere based on the DTA/DSC thermal-analysis instrumentation is switched and the flow quantity intelligent control module, mainly be made up of atmosphere handover module and flow-control module, it is characterized in that: described atmosphere handover module mainly comprises atmosphere switching solenoid valve V1 and is electrically connected with this atmosphere switching solenoid valve V1 and in order to control the gas switch driving circuit that its gas circuit is switched; Described atmosphere switching solenoid valve V1 is a two-position three way magnetic valve, comprises air intake opening and gas outlet of two external one road gases of each difference; Described flow-control module is mainly formed by proportioning valve V4, flow sensor FS, chip microprocessor MCU, DA converter with in order to the traffic driven circuit that drives proportioning valve V4, and described flow sensor FS, chip microprocessor MCU, DA converter, traffic driven circuit and proportioning valve V4 are electrically connected successively; The gas outlet of described atmosphere switching solenoid valve V1 is connected with the air intake opening of described proportioning valve V4 through reduction valve V2, needle valve V3 successively by gas pipe line, and the gas outlet of described proportioning valve V4 is connected with the air intake opening of flow sensor FS; Described chip microprocessor MCU is electrically connected with the gas switch driving circuit.
Wherein, described chip microprocessor MCU is also by external flow set of USB port and atmosphere switching device shifter.
Wherein, described flow set and atmosphere switching device shifter are touch-screen.
Wherein, described gas switch driving circuit mainly is made up of driving circuit and light lotus root, and described chip microprocessor MCU, driving circuit, light lotus root and atmosphere switching solenoid valve V1 are electrically connected successively.
Compared with prior art, the utility model has the advantages that:
1, atmosphere handover module of the present utility model mainly comprises atmosphere switching solenoid valve V1 and is electrically connected with this atmosphere switching solenoid valve V1 and in order to control the gas switch driving circuit that its gas circuit is switched.In the atmosphere handover module, after host computer sent switching command, to chip microprocessor MCU, chip microprocessor MCU became control signal by driving circuit and light lotus root conversion of signals with command transfer, switch thereby drive two-position three way magnetic valve, finish the switching controls of atmosphere alternative.Solenoid valve is selected the normal open type for use, and atmosphere taps into into follow-up gas circuit always under situation about not powering on, and solenoid valve employing 24VDC power supply, and consumed power is little, and switch is also less to the influence of gas circuit, can satisfy the steady switching of atmosphere.
2, flow-control module of the present utility model is mainly formed by proportioning valve V4, flow sensor FS, chip microprocessor MCU, DA converter with in order to the traffic driven circuit that drives proportioning valve V4.Atmosphere feeds flow-control module, also promptly feed proportioning valve, export from proportioning valve, feed flow sensor, the signal of flow sensor reaches chip microprocessor MCU by transmission interface, after the digital PID control algolithm is calculated, and output control signal control ratio valve, the control voltage that also promptly changes proportioning valve comes by-pass valve control, thereby regulates the atmosphere flow that proportioning valve exports sensor to.By this feedback control loop, improved flow control accuracy greatly.
Description of drawings
Fig. 1 is that the utility model is based on the special-purpose atmosphere switching of DTA/DSC thermal-analysis instrumentation and the structural representation of flow quantity intelligent control module.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, a kind of special-purpose atmosphere based on the DTA/DSC thermal-analysis instrumentation is switched and the flow quantity intelligent control module, mainly is made up of atmosphere handover module and flow-control module; Described atmosphere handover module mainly comprises atmosphere switching solenoid valve V1 and is electrically connected with this atmosphere switching solenoid valve V1 and in order to control the gas switch driving circuit that its gas circuit is switched; Described atmosphere switching solenoid valve V1 is a two-position three way magnetic valve, comprises air intake opening and gas outlet of two external one road gases of each difference.
In the atmosphere handover module, after host computer sent switching command, to chip microprocessor MCU, chip microprocessor MCU became control signal by driving circuit and light lotus root conversion of signals with command transfer, switch thereby drive two-position three way magnetic valve, finish the switching controls of atmosphere alternative.Solenoid valve is selected the normal open type for use, and atmosphere taps into into follow-up gas circuit always under situation about not powering on, and solenoid valve employing 24VDC power supply, and consumed power is little, and switch is also less to the influence of gas circuit, can satisfy the steady switching of atmosphere.
Described flow-control module is mainly formed by proportioning valve V4, flow sensor FS, chip microprocessor MCU, DA converter with in order to the traffic driven circuit that drives proportioning valve V4, and described flow sensor FS, chip microprocessor MCU, DA converter, traffic driven circuit and proportioning valve V4 are electrically connected successively; The gas outlet of described atmosphere switching solenoid valve V1 is connected with the air intake opening of described proportioning valve V4 through reduction valve V2, needle valve V3 successively by gas pipe line, and the gas outlet of described proportioning valve V4 is connected with the air intake opening of flow sensor FS; Described chip microprocessor MCU is electrically connected with the gas switch driving circuit.
Two-way gas (atmosphere one, atmosphere two) feeds atmosphere switching solenoid valve V1, and atmosphere switching solenoid valve V1 controls the output of one tunnel atmosphere, and atmosphere enters reduction valve V2, and atmosphere feeds needle valve V3 from reduction valve V2 output back.Atmosphere is carried out the step-down current limliting to atmosphere after this gas circuit output, atmosphere feeds flow-control module then, also promptly feed proportioning valve, from proportioning valve output, feed flow sensor, the signal of flow sensor reaches chip microprocessor MCU by transmission interface, after the digital PID control algolithm is calculated, output control signal control ratio valve, the control voltage that also promptly changes proportioning valve comes by-pass valve control, thereby regulates the atmosphere flow that proportioning valve exports sensor to.
In the flow-control module, after being provided with the atmosphere flow number, data will be transferred to chip microprocessor MCU equally; Adopt the I2C communication between chip microprocessor MCU and the flow sensor, flow sensor is transferred to chip microprocessor MCU after the flow signal that detects is changed, chip microprocessor MCU with these data with numerical value be set compare, calculating through pid control algorithm, output signal, through DA conversion and driving circuit output control voltage, switch threshold values size with the valve of control ratio valve, the laggard inbound traffics sensor of the atmosphere passing ratio of flowing through, to change back atmosphere flow signal by flow sensor again and feed back to chip microprocessor MCU, by this feedback control loop, can make flow control reach setting value.
Wherein, described chip microprocessor MCU is also by external flow set of USB port and atmosphere switching device shifter.Described flow set and atmosphere switching device shifter are touch-screen.Described gas switch driving circuit mainly is made up of driving circuit and light lotus root, and described chip microprocessor MCU, driving circuit, light lotus root and atmosphere switching solenoid valve V1 are electrically connected successively.
More than show and described ultimate principle of the present utility model and principal character and advantage thereof.The technology personage of the industry should understand; the utility model is not subjected to the restriction of above-mentioned implementing regulations; that describes in above-mentioned implementing regulations and the instructions just is used to illustrate principle of the present utility model; under the prerequisite that does not break away from the utility model principle and scope; the utility model also can have various changes and modifications, and these changes and improvements all belong in claimed the utility model scope.
The claimed scope of the utility model defines with appending claims and other equivalent.
Claims (4)
1. the special-purpose atmosphere based on the DTA/DSC thermal-analysis instrumentation is switched and the flow quantity intelligent control module, mainly be made up of atmosphere handover module and flow-control module, it is characterized in that: described atmosphere handover module mainly comprises atmosphere switching solenoid valve V1 and is electrically connected with this atmosphere switching solenoid valve V1 and in order to control the gas switch driving circuit that its gas circuit is switched; Described atmosphere switching solenoid valve V1 is a two-position three way magnetic valve, comprises air intake opening and gas outlet of two external one road gases of each difference; Described flow-control module is mainly formed by proportioning valve V4, flow sensor FS, chip microprocessor MCU, DA converter with in order to the traffic driven circuit that drives proportioning valve V4, and described flow sensor FS, chip microprocessor MCU, DA converter, traffic driven circuit and proportioning valve V4 are electrically connected successively; The gas outlet of described atmosphere switching solenoid valve V1 is connected with the air intake opening of described proportioning valve V4 through reduction valve V2, needle valve V3 successively by gas pipe line, and the gas outlet of described proportioning valve V4 is connected with the air intake opening of flow sensor FS; Described chip microprocessor MCU is electrically connected with the gas switch driving circuit.
2. the special-purpose atmosphere based on the DTA/DSC thermal-analysis instrumentation according to claim 1 is switched and the flow quantity intelligent control module, it is characterized in that: described chip microprocessor MCU is also by external flow set of USB port and atmosphere switching device shifter.
3. the special-purpose atmosphere based on the DTA/DSC thermal-analysis instrumentation according to claim 2 is switched and the flow quantity intelligent control module, and it is characterized in that: described flow set and atmosphere switching device shifter are touch-screen.
4. the special-purpose atmosphere based on the DTA/DSC thermal-analysis instrumentation according to claim 1 is switched and the flow quantity intelligent control module, it is characterized in that: described gas switch driving circuit mainly is made up of driving circuit and light lotus root, and described chip microprocessor MCU, driving circuit, light lotus root and atmosphere switching solenoid valve V1 are electrically connected successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206527222U CN201955645U (en) | 2010-12-10 | 2010-12-10 | Special atmosphere switch and flow intelligent control module based on DTA (Differential Thermal Analysis)/DSC (Differential Scanning Calorimetry) thermal analysis instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206527222U CN201955645U (en) | 2010-12-10 | 2010-12-10 | Special atmosphere switch and flow intelligent control module based on DTA (Differential Thermal Analysis)/DSC (Differential Scanning Calorimetry) thermal analysis instrument |
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| CN201955645U true CN201955645U (en) | 2011-08-31 |
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| CN2010206527222U Expired - Fee Related CN201955645U (en) | 2010-12-10 | 2010-12-10 | Special atmosphere switch and flow intelligent control module based on DTA (Differential Thermal Analysis)/DSC (Differential Scanning Calorimetry) thermal analysis instrument |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102541003A (en) * | 2011-12-27 | 2012-07-04 | 成都众询科技有限公司 | Wireless communication thermal analysis monitoring system |
| CN105259801A (en) * | 2015-09-30 | 2016-01-20 | 哈尔滨工业大学 | Stable rapid atmosphere switching method, system and application |
| CN107449157A (en) * | 2017-08-11 | 2017-12-08 | 杭州航民江东热电有限公司 | Boiler desuperheat water control system |
-
2010
- 2010-12-10 CN CN2010206527222U patent/CN201955645U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102541003A (en) * | 2011-12-27 | 2012-07-04 | 成都众询科技有限公司 | Wireless communication thermal analysis monitoring system |
| CN105259801A (en) * | 2015-09-30 | 2016-01-20 | 哈尔滨工业大学 | Stable rapid atmosphere switching method, system and application |
| CN105259801B (en) * | 2015-09-30 | 2018-03-30 | 哈尔滨工业大学 | The method and system and its application that a kind of atmosphere is steadily switched fast |
| CN107449157A (en) * | 2017-08-11 | 2017-12-08 | 杭州航民江东热电有限公司 | Boiler desuperheat water control system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20181210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |