CN201096544Y - Injection moulding machine controller temperature signal conversion measuring circuit - Google Patents
Injection moulding machine controller temperature signal conversion measuring circuit Download PDFInfo
- Publication number
- CN201096544Y CN201096544Y CNU2007201847699U CN200720184769U CN201096544Y CN 201096544 Y CN201096544 Y CN 201096544Y CN U2007201847699 U CNU2007201847699 U CN U2007201847699U CN 200720184769 U CN200720184769 U CN 200720184769U CN 201096544 Y CN201096544 Y CN 201096544Y
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- injection molding
- temperature signal
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Abstract
Disclosed is a temperature signal conversion measurement circuit which is used for the controller of the injection molding machine and comprises an amplifying circuit, a thermocouple cold junction compensation circuit, a voltage frequency translation circuit and a high-speed optical-coupler signal interface circuit. The thermocouple signal is inputted into the amplifying circuit; the thermocouple cold junction compensation signal generated by an integrated temperature sensor is also inputted into the amplifying circuit; the signal is inputted into the voltage frequency translation circuit to generate the frequency signal which is proportional to the temperature signal after the signal is amplified and compensated; the frequency signal is transmitted to the frequency meter of the control inner core of the injection molding machine through the high-speed optical-coupler. The temperature signal conversion measurement circuit used for the controller of the injection molding machine has the advantages of strong electricity inversion resistance, simple interface and strong anti-interference capability so that the conversion measurement of the temperature can be safely realized in the injection molding machine environment stably and reliably.
Description
[affiliated technical field]
The utility model relates to a kind of temperature signal converted measurement circuit, especially is applied in the controller of plastic injection molding, and K type Thermocouple Temperature Signal is carried out converted measurement.
[background technology]
In controller of plastic injection molding, need measure the barrel temperature signal, common method is that K type thermopair is installed on the barrel arm, this Thermocouple Temperature Signal is connected in the temperature signal converted measurement circuit of controller of plastic injection molding.Owing to also have forceful electric power devices such as electric heater on the barrel arm, under extreme case, may invade in the temperature signal converted measurement circuit of controller of plastic injection molding by the direct even forceful electric power of thermopair electric leakage, the damage temperature signal converted measurement circuit that its consequence is light, a whole set of controller of plastic injection molding of serious damage and even injection machine equipment.
Invade problem at above-mentioned forceful electric power, common solution countermeasure is an electrical isolation between other module of temperature signal converted measurement circuit and controller of plastic injection molding, has occurred the Interface design problem between temperature signal converted measurement circuit and the controller of plastic injection molding thus again.Because the general dual integration AD converter that adopts is as modulus conversion chip, as the similar device of ICL7109, complex interfaces needs 3 or above optocoupler transmission signal at least, and there is strict sequential relationship between these interface signals, is vulnerable to disturb cause the converted measurement result to make mistakes.
[summary of the invention]
Technical problem to be solved in the utility model provides a kind of do not fear the controller of plastic injection molding temperature signal converted measurement circuit that forceful electric power is invaded, interface is simple, antijamming capability is strong, the converted measurement of finishing temperature signal in the injection machine environment that can be safe, reliable and stable.
The technical solution of the utility model is: form this temperature signal converted measurement circuit by amplifying circuit, cold junction compensation circuit, voltage frequency conversioning circuit and signal interface circuit, wherein, amplifying circuit adopts measuring amplifier and peripheral circuit thereof to constitute, the cold junction compensation circuit adopts voltage-type integrated temperature sensor LM35 and peripheral circuit thereof to constitute, voltage frequency conversioning circuit adopts Voltage-to-frequency Converter AD654 and peripheral circuit thereof to constitute, and signal interface circuit adopts high speed photo coupling and peripheral circuit thereof to constitute.Thermocouple signal is connected to amplifying circuit earlier, amplifying circuit output is connected in the voltage frequency conversioning circuit, freq converting circuit output is connected with a high speed photo coupling input end, the output terminal of high speed photo coupling is linked the kernel of controller of plastic injection molding, wherein also connects into the cold junction compensation signal at amplifying circuit.Circuit such as measuring amplifier, Voltage-to-frequency Converter and device insert positive and negative dual power supply from the independent current source with other module electrical isolation of injection machine, floating ground.Thermocouple signal is first through clamp and Filtering Processing in amplifying circuit, be sent to measuring amplifier then, signal is amplified to suitable level and adds the cold junction compensation signal, this amplification and revised signal are sent into the voltage-frequency conversion circuit again, be converted into and the proportional frequency signal of initial temperature value, frequency signal is sent in the frequency meter of controller of plastic injection molding kernel through high speed photo coupling.
After adopting the utility model, only be connected between other module of temperature signal converted measurement circuit and controller of plastic injection molding by high speed photo coupling, it is electrical isolation, when forceful electric power is invaded, do not have watt current return into, therefore can not damage other module of this temperature signal converted measurement circuit and controller of plastic injection molding; Have only a high speed photo coupling to be connected between temperature signal converted measurement circuit and the controller of plastic injection molding kernel, interface is very simple, and what transmit is frequency signal, does not have the interface sequence stationary problem, can not possess very strong antijamming capability because of undesired signal produces the sequential confusion.After adopting the utility model, the converted measurement of in the injection machine environment, finishing temperature signal that temperature signal converted measurement circuit can be safe, reliable and stable.
[description of drawings]
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the circuit theory diagrams of the utility model controller of plastic injection molding with a kind of embodiment of temperature signal converted measurement circuit.
[embodiment]
In Fig. 1, measuring amplifier U2, resistance R 1 and R4～R8, capacitor C 2 and diode D1～D2 constitute amplifying circuit, voltage-type integrated temperature sensor U3 output cold junction compensation signal, Voltage-to-frequency Converter U1, capacitor C 1, resistance R 2, potentiometer W1 constitute the voltage-frequency conversion circuit, and high speed photo coupling O1 and resistance R 2 constitute signal interface circuit.Thermocouple signal is linked into amplifying circuit from T+, T-, amplifying circuit is introduced the cold junction compensation signal, the output of amplifying circuit is linked Voltage-to-frequency Converter U1 through resistance R 3, high speed photo coupling O1 input end is linked in the frequency signal output of Voltage-to-frequency Converter U1, and the output terminal of high speed photo coupling O1 links to each other with the frequency meter of controller of plastic injection molding kernel.TGND among the figure is floating ground ,+Vcc ,-Vcc is the power supply with other module electrical isolation of controller of plastic injection molding.
In Fig. 1, described Voltage-to-frequency Converter U1 model can be AD654, and described voltage-type integrated temperature sensor model can be LM35.
In Fig. 1, TGND is floating ground, and the input end of high speed photo coupling O1 and output terminal electrical isolation are when forceful electric power is invaded this temperature signal converted measurement circuit through T+, T-end, the no current loop is not so can damage other module of this temperature signal converted measurement circuit and controller of plastic injection molding.Have only the kernel module interface of high speed photo coupling O1 and controller of plastic injection molding, interface circuit is simple.What transmit through high speed photo coupling O1 is frequency signal, the synchronous requirement of no sequential, so possess very strong antijamming capability, can not cause the interface step-out and cause converted measurement to be made mistakes because of undesired signal.
Claims (5)
1, a kind of controller of plastic injection molding temperature signal measurement circuit, be used to measure the Thermocouple Temperature Signal that is installed on the injecting machine material tube, it is characterized in that: described temperature signal measurement circuit is by amplifying circuit, the cold junction compensation circuit, the voltage-frequency conversion circuit, signal interface circuit is formed, thermocouple signal is input to amplifying circuit, also insert the cold junction compensation signal at amplifying circuit, amplify and compensate the back signal and be sent to the voltage-frequency conversion circuit, produce and the proportional frequency signal of temperature signal, frequency signal is sent in the frequency meter of injection machine control kernel through high speed photo coupling.
2, controller of plastic injection molding according to claim 1 temperature signal measurement circuit, it is characterized in that: metering circuit is made of measuring amplifier and peripheral circuit thereof, and inserts the cold junction compensation signal and carry out cold junction compensation.
3, controller of plastic injection molding according to claim 1 temperature signal measurement circuit is characterized in that: the cold junction compensation signal is produced by the voltage-type integrated temperature sensor, and voltage-type integrated temperature sensor model is LM35.
4, controller of plastic injection molding according to claim 1 temperature signal measurement circuit, it is characterized in that: the temperature signal digitizing is realized by Voltage-to-frequency Converter and peripheral circuit thereof, convert temperature signal to proportional with it frequency signal, the Voltage-to-frequency Converter model is AD654.
5, controller of plastic injection molding according to claim 1 temperature signal measurement circuit is characterized in that: the signal after the temperature digitalization adopts a high speed photo coupling to be sent in the kernel circuitry of controller of plastic injection molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201847699U CN201096544Y (en) | 2007-10-26 | 2007-10-26 | Injection moulding machine controller temperature signal conversion measuring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201847699U CN201096544Y (en) | 2007-10-26 | 2007-10-26 | Injection moulding machine controller temperature signal conversion measuring circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201096544Y true CN201096544Y (en) | 2008-08-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201847699U Expired - Fee Related CN201096544Y (en) | 2007-10-26 | 2007-10-26 | Injection moulding machine controller temperature signal conversion measuring circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN201096544Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901574A (en) * | 2011-07-25 | 2013-01-30 | 万洲电气股份有限公司 | Detection circuit suitable for on-line temperature of high-voltage solid-state soft starter |
| CN103057099A (en) * | 2013-01-06 | 2013-04-24 | 富通集团有限公司 | Temperature detection circuit for extruding machine cylinder |
| CN106197730A (en) * | 2016-08-30 | 2016-12-07 | 南京双京电器集团有限公司 | A kind of temperature frequency conversion equipment |
| CN108494296A (en) * | 2017-12-26 | 2018-09-04 | 宁波兴泰科技有限公司 | A kind of position signal conversion module of servo motor |
-
2007
- 2007-10-26 CN CNU2007201847699U patent/CN201096544Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901574A (en) * | 2011-07-25 | 2013-01-30 | 万洲电气股份有限公司 | Detection circuit suitable for on-line temperature of high-voltage solid-state soft starter |
| CN103057099A (en) * | 2013-01-06 | 2013-04-24 | 富通集团有限公司 | Temperature detection circuit for extruding machine cylinder |
| CN106197730A (en) * | 2016-08-30 | 2016-12-07 | 南京双京电器集团有限公司 | A kind of temperature frequency conversion equipment |
| CN108494296A (en) * | 2017-12-26 | 2018-09-04 | 宁波兴泰科技有限公司 | A kind of position signal conversion module of servo motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NONE WUXI CITY HITACHI MAXELL LTD.; PATENTEE Free format text: FORMER OWNER: NINGBO HAITIAN NORTH OF TECHNOLOGY CO.; PATENTEE Effective date: 20081017 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081017 Address after: Block B4-D, national hi tech Industrial Development Zone, Wuxi, Jiangsu, zip code: 214142 Co-patentee after: Hangzhou Keqiang Intelligent Control System Co., Ltd. Patentee after: Wuxi Haitian Machinery Co., Ltd. Address before: No. 505, West Road, Zhejiang, Ningbo, Beilun, China. Zip code: 310012 Co-patentee before: Hangzhou Keqiang Intelligent Control System Co., Ltd. Patentee before: Ningbo Haitian North Chemical Technology Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 214142 B4-D, national hi tech Industrial Development Zone, Jiangsu, Wuxi Co-patentee after: Zhejiang Keqiang Intelligent Control System Co., Ltd. Patentee after: Wuxi haitian machinery Co., Ltd. Address before: 214142 B4-D, national hi tech Industrial Development Zone, Jiangsu, Wuxi Co-patentee before: Hangzhou Keqiang Intelligent Control System Co., Ltd. Patentee before: Wuxi haitian machinery Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080806 Termination date: 20161026 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |