CN203293498U - Injection molding machine and multisection temperature signal measuring circuit thereof - Google Patents
Injection molding machine and multisection temperature signal measuring circuit thereof Download PDFInfo
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- CN203293498U CN203293498U CN2013202808042U CN201320280804U CN203293498U CN 203293498 U CN203293498 U CN 203293498U CN 2013202808042 U CN2013202808042 U CN 2013202808042U CN 201320280804 U CN201320280804 U CN 201320280804U CN 203293498 U CN203293498 U CN 203293498U
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 26
- 230000003321 amplification Effects 0.000 claims abstract description 41
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 41
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 238000005259 measurement Methods 0.000 claims description 42
- 238000002347 injection Methods 0.000 claims description 20
- 239000007924 injection Substances 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 description 7
- 239000004744 fabric Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Injection Moulding Of Plastics Or The Like (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model discloses an injection molding machine and a multisection temperature signal measuring circuit thereof. The multisection temperature signal measuring circuit comprises output ends connected with corresponding thermocouples respectively, a plurality of processing modules used for processing temperature potential signals acquired by the corresponding thermocouples respectively, an amplification module, a switching module used for outputting the temperature potential signals output by the corresponding processing modules to the amplification module under control of a controller of the injection molding machine, an output module used for performing conversion processing on signals amplified by the amplification module and outputting the signals to the controller of the injection molding machine, and a compensation module used for converting an acquired environment temperature signal into a voltage signal and outputting the voltage signal to a reference end of the amplification module for cold junction compensation. With the adoption of the technical scheme, multisection temperature can be measured accurately and reliably; in addition, the cost is low; and a PCB (Printed Circuit Board) is simple in layout.
Description
Technical field
The utility model relates to the temperature survey field, relates in particular to a kind of injection machine and multistage temperature signal measurement circuit thereof.
Background technology
In injection machine, need to measure the barrel temperature signal, common method is, on the barrel arm, thermocouple is installed, and the temperature electric potential signal that measuring circuit gathers this thermocouple is sent to controller after processing, and this measuring circuit is carried out cold junction compensation to the thermocouple of thermometric simultaneously.Yet the barrel of injection machine need to carry out the multistage temperature survey, if every section temperature survey all arranges a measuring circuit, cost is higher on the one hand, and the PCB fabric swatch is also more difficult on the other hand.
The utility model content
The technical problems to be solved in the utility model is, the defect of, PCB fabric swatch difficulty high for the above-mentioned cost of prior art provides a kind of cost the low and simple multistage temperature signal measurement of PCB fabric swatch circuit.
The technical scheme that its technical problem that solves the utility model adopts is: the multistage temperature signal measurement circuit of a kind of injection machine of structure, be used for the temperature electric potential signal that a plurality of thermocouples of measure setup on the injecting machine material tube diverse location gather, and measurement result is sent to controller of plastic injection molding, it is characterized in that, described multistage temperature signal measurement circuit comprises:
Be connected to the output of corresponding thermocouple, and be respectively used to a plurality of processing modules that the temperature electric potential signal that corresponding thermocouple is gathered is processed;
Amplification module;
Be connected in the output of described a plurality of processing modules and the input of described amplification module, and for the temperature electric potential signal of under the control of controller of plastic injection molding, corresponding processing module being exported, export the handover module of described amplification module to;
Be connected in the output of described amplification module, and for the output module by amplifying signal after processing through described amplification module and carrying out conversion process and export controller of plastic injection molding to; And
Be connected in the reference edge of described amplification module, and the reference edge that converts voltage signal to and export described amplification module to for the ambient temperature signal by gathering is to carry out the compensating module of cold junction compensation.
In multistage temperature signal measurement circuit described in the utility model, described handover module is analog multiplexer or relay.
In multistage temperature signal measurement circuit described in the utility model, described compensating module comprises:
For gathering the temperature sensor of environment temperature, and the output of described temperature sensor connects the reference edge of described amplification module.
In multistage temperature signal measurement circuit described in the utility model, described compensating module also comprises:
Be connected to the voltage follower between the reference edge of the output of described temperature sensor and described amplification module, and, the input of described voltage follower connects the output of described temperature sensor, and the output of described voltage follower connects the reference edge of described amplification module.
In multistage temperature signal measurement circuit described in the utility model, described temperature sensor comprises that model is the integrated chip of LM35.
In multistage temperature signal measurement circuit described in the utility model, described output module comprises:
Be used for the voltage-frequency converter that converts the signal of described amplification module output to frequency signal and export controller of plastic injection molding to.
In multistage temperature signal measurement circuit described in the utility model, described output module comprises:
Be connected in described voltage-frequency converter, and for described frequency signal being carried out to the isolated location of numeral isolation.
In multistage temperature signal measurement circuit described in the utility model, described isolated location is magnetic couple isolating chip or optocoupler.
In multistage temperature signal measurement circuit described in the utility model, described output module is:
Be used for the analog-digital converter that converts the signal of described amplification module output to data signal and export controller of plastic injection molding to.
The utility model is also constructed a kind of injection machine, comprises controller of plastic injection molding, is arranged on a plurality of thermocouples on the injecting machine material tube diverse location, and described injection machine also comprises above-described multistage temperature signal measurement circuit.
Implement the technical solution of the utility model, when injecting machine material tube is carried out to the multistage temperature survey, do not need every section an independent measuring circuit all is set, but the temperature electric potential signal of a plurality of thermocouples being exported by handover module carries out the timesharing switching, guarantee that each constantly, only have a road temperature electric potential signal to send into rear class, therefore, can be accurately, reliably the multistage temperature is measured, and, cost is low, and the PCB fabric swatch is simple.
In addition, when carrying out cold junction compensation, due to a voltage follower being set after temperature sensor, the large input impedance of compensating module, little output impedance be can guarantee, thereby precision and the antijamming capability of cold junction compensation improved.
The accompanying drawing explanation
The utility model is described in further detail below in conjunction with drawings and Examples, in accompanying drawing:
Fig. 1 is the logic chart of the multistage temperature signal measurement circuit embodiments one of the utility model injection machine;
Fig. 2 is the logic chart of the multistage temperature signal measurement circuit embodiments two of the utility model injection machine;
Fig. 3 is the logic chart of the multistage temperature signal measurement circuit embodiments three of the utility model injection machine;
Fig. 4 is the circuit diagram of the multistage temperature signal measurement circuit embodiments four of the utility model injection machine.
The specific embodiment
For in prior art when injecting machine material tube is carried out to the multistage temperature survey, cost is high, the defect of PCB fabric swatch difficulty, the present invention builds a kind of new injection machine, this injection machine comprises controller of plastic injection molding, is arranged on a plurality of thermocouples and multistage temperature signal measurement circuit on the injecting machine material tube diverse location, this multistage temperature signal measurement circuit can be measured the temperature electric potential signal that a plurality of thermocouples gather, and measurement result is sent to controller of plastic injection molding, the structure of this multistage temperature signal measurement circuit will illustrate hereinafter.
Fig. 1 is the logic chart of the multistage temperature signal measurement circuit embodiments one of the utility model injection machine, and this multistage temperature signal measurement circuit comprises: a plurality of processing modules 100 ..., 100 ', handover module 200, amplification module 300, output module 400 and compensating module 500.Wherein, a plurality of processing modules 100 ..., 100 ' be connected to the output (not shown) of corresponding thermocouple, and each processing module is processed for the temperature electric potential signal that corresponding thermocouple is gathered.Handover module 200 has many to input and pair of output, and its every pair input all connects the output of respective handling module, its output connects the input of amplification module 300, and, this handover module 200 is under the control of controller of plastic injection molding (not shown), the temperature electric potential signal that corresponding processing module is exported exports amplification module 300 to, preferably, handover module 200 can be analog multiplexer or relay, and analog multiplexer is for example the multichannel analog switch of CD4052 for model.The temperature electric potential signal that 300 pairs of amplification modules are inputted amplifies processing.The input of output module 400 connects the output of amplification module 300, and for carrying out conversion process through the signal that amplification module 300 amplifies after processing, and export the controller of plastic injection molding (not shown) to.Compensating module 500 converts voltage signal to for the ambient temperature signal by gathering and exports the reference edge of amplification module 300 to, to carry out cold junction compensation.
Fig. 2 is the logic chart of the multistage temperature signal measurement circuit embodiments two of the utility model injection machine, this embodiment compares embodiment shown in Figure 1, difference is only, compensating module 500 specifically comprises temperature sensor 510 and the voltage follower 520 that is connected, this temperature sensor 510 is for example the integrated chip of LM35 for model, and be used to gathering environment temperature, the input of voltage follower 520 connects the output of temperature sensor 510, the output of voltage follower 520 connects the reference edge of amplification module 300, this voltage follower 520 can reduce the internal resistance of compensating module, to guarantee the large input impedance of compensating module, little output impedance, and then precision and the antijamming capability of assurance cold junction compensation.Certainly, in other embodiments, can save voltage follower 520, that is, the output of temperature sensor 510 is connected directly to the reference edge of amplification module 300.
Fig. 3 is the logic chart of the multistage temperature signal measurement circuit embodiments three of the utility model injection machine, this embodiment compares embodiment shown in Figure 2, difference is only, output module 400 can specifically comprise voltage-frequency converter 410 and the isolated location 420 that is connected, the voltage-frequency conversion, 410 convert frequency signal to for the signal by amplification module 300 outputs, and isolated location 420 exports the controller of plastic injection molding (not shown) for frequency signal is carried out to after the numeral isolation.This isolated location 420 is for example magnetic couple isolating chip or optocoupler.Certainly, in further embodiments, output module 400 also can be analog-digital converter, and this analog-digital converter converts data signal to for the signal by amplification module 300 outputs, then exports controller of plastic injection molding to.
Fig. 4 is the circuit diagram of the multistage temperature signal measurement circuit embodiments four of the utility model injection machine, this multistage temperature signal measurement circuit comprises a plurality of processing modules, handover module, amplification module, output module and compensating module, below illustrates each module:
In processing module, TEMP0-, TEMP0+ be first thermocouple two outputs ..., TEMPN-, TEMPN+ be two outputs of N thermocouple, N is natural number.Below only as an example of the processing module corresponding with first thermocouple example, describe, in this processing module, the negative pole of the positive pole of diode D1 and diode D2 meets respectively the negative output terminal TEMP0-of first thermocouple, the positive pole of the negative pole of diode D3 and diode D4 meets respectively the positive output end TEMP0+ of first thermocouple, and the negative pole of the positive pole of the negative pole of diode D1, diode D2, the positive pole of diode D3, diode D4 is ground connection in the lump.The first input end of common mode inductance L2, the second input connect respectively the negative, positive output of first thermocouple, capacitor C 1 is connected between the first output, the second output of common mode inductance L2, capacitor C 2 is connected between the first output and ground of common mode inductance L2, and capacitor C 3 is connected between the second output and ground of common mode inductance L2.The circuit structure that should be understood that the processing module corresponding with other thermocouple is similar with it, does not repeat them here.
Handover module is analog multiplexer U1, the model of this analog multiplexer U1 is CD4052, four control ends of this analog multiplexer U1 connect respectively four output ports of controller of plastic injection molding, and the wherein a pair of input (corresponding with first thermocouple) of this analog multiplexer U1 connects respectively the first output, the second output of common mode inductance L2 by resistance R 2, R1.Those skilled in the art will be understood that other input of this analog multiplexer U1 and the annexation of respective handling module, do not repeat them here.
In amplification module, the model of operational amplifier U7 is such as being AD620, AD8221 etc., two inputs of this operational amplifier U7 connect respectively two outputs of this analog multiplexer U1, capacitor C 87 is connected between two inputs of operational amplifier U7, and resistance R 38 is connected between two adjustment ends of operational amplifier U7.
In output module, the model of voltage-frequency converter U8 is for example AD654, and the model of magnetic couple isolating chip U38 is for example AD1201.The input of voltage-frequency converter U8 connects the output of operational amplifier U7 by resistance R 224, resistance R 36 and rheostat R37 are connected between the resistance adjustment end and ground of voltage-frequency converter U8, capacitor C 92 is connected to two electric capacity adjustment ends of voltage-frequency converter U8, the output of voltage-frequency converter U8 connects the input of magnetic couple isolating chip U38 by resistance R 494, connect the input (OUT-F) of the output termination controller of plastic injection molding of magnetic couple isolating chip U38.
In compensating module, the model of temperature sensor U9 is for example LM35, and the output of temperature sensor U9 connects the positive input terminal of voltage follower U10, and the output of voltage follower U10 connects respectively the reference edge of its negative input end and operational amplifier U7.
the following describes the operation principle of this multistage temperature signal measurement circuit: for example, if need to measure the temperature electric potential signal that first thermocouple gathers, controller of plastic injection molding is by the output of the control end to analog multiplexer U1 control signal, so that its output is connected with first pair of input, like this, the temperature electric potential signal (voltage signal) that this road thermocouple gathers is successively through diode D1, D2, D3, the D4 clamper, common mode inductance L2 suppresses, capacitor C 1, C2, C3 filtering and resistance R 1, after the R2 protection, by analog multiplexer U1, enter operational amplifier U7, to amplify processing.For operational amplifier U7, can regulate multiplication factor by the resistance of regulating resistance R38.Then the signal that amplifies after processing enters voltage-frequency converter U8, voltage-frequency converter U8 converts the voltage signal of input to corresponding frequency signal, for voltage-frequency converter U8, can regulate the relation of input voltage with output frequency by the resistance of regulating resistance R36, R37 and the resistance of capacitor C 92, the last frequency signal enters magnetic couple isolating chip U38 isolates, and finally enters into controller of plastic injection molding.In addition, temperature sensor U9 gathers environment temperature, and convert thereof into voltage signal, voltage follower U10 exports the voltage signal of changing to reference edge that U7 is abandoned in computing, to guarantee large input impedance, the little output impedance of cold junction compensation, thereby guarantee precision and the antijamming capability of cold junction compensation.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in claim scope of the present utility model.
Claims (10)
1. the multistage temperature signal measurement circuit of an injection machine, be used for the temperature electric potential signal that a plurality of thermocouples of measure setup on the injecting machine material tube diverse location gather, and measurement result is sent to controller of plastic injection molding, and it is characterized in that, described multistage temperature signal measurement circuit comprises:
Be connected to the output of corresponding thermocouple, and be respectively used to a plurality of processing modules that the temperature electric potential signal that corresponding thermocouple is gathered is processed;
Amplification module;
Be connected in the output of described a plurality of processing modules and the input of described amplification module, and for the temperature electric potential signal of under the control of controller of plastic injection molding, corresponding processing module being exported, export the handover module of described amplification module to;
Be connected in the output of described amplification module, and for the output module by amplifying signal after processing through described amplification module and carrying out conversion process and export controller of plastic injection molding to; And
Be connected in the reference edge of described amplification module, and the reference edge that converts voltage signal to and export described amplification module to for the ambient temperature signal by gathering is to carry out the compensating module of cold junction compensation.
2. multistage temperature signal measurement circuit according to claim 1, is characterized in that, described handover module is analog multiplexer or relay.
3. multistage temperature signal measurement circuit according to claim 1, is characterized in that, described compensating module comprises:
For gathering the temperature sensor of environment temperature, and the output of described temperature sensor connects the reference edge of described amplification module.
4. multistage temperature signal measurement circuit according to claim 3, is characterized in that, described compensating module also comprises:
Be connected to the voltage follower between the reference edge of the output of described temperature sensor and described amplification module, and, the input of described voltage follower connects the output of described temperature sensor, and the output of described voltage follower connects the reference edge of described amplification module.
5. multistage temperature signal measurement circuit according to claim 3, is characterized in that, described temperature sensor comprises that model is the integrated chip of LM35.
6. the described multistage temperature signal measurement of according to claim 1-4 any one circuit, is characterized in that, described output module comprises:
Be used for the voltage-frequency converter that converts the signal of described amplification module output to frequency signal and export controller of plastic injection molding to.
7. multistage temperature signal measurement circuit according to claim 6, is characterized in that, described output module comprises:
Be connected in described voltage-frequency converter, and for described frequency signal being carried out to the isolated location of numeral isolation.
8. multistage temperature signal measurement circuit according to claim 7, is characterized in that, described isolated location is magnetic couple isolating chip or optocoupler.
9. the described multistage temperature signal measurement of according to claim 1-4 any one circuit, is characterized in that, described output module is:
Be used for the analog-digital converter that converts the signal of described amplification module output to data signal and export controller of plastic injection molding to.
10. an injection machine, comprise controller of plastic injection molding, be arranged on a plurality of thermocouples on the injecting machine material tube diverse location, it is characterized in that, described injection machine also comprises the described multistage temperature signal measurement of claim 1-9 any one circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202808042U CN203293498U (en) | 2013-05-21 | 2013-05-21 | Injection molding machine and multisection temperature signal measuring circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013202808042U CN203293498U (en) | 2013-05-21 | 2013-05-21 | Injection molding machine and multisection temperature signal measuring circuit thereof |
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| CN203293498U true CN203293498U (en) | 2013-11-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115389238A (en) * | 2022-08-22 | 2022-11-25 | 楚岳(惠州)热传科技有限公司 | Radiator performance test system and test method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115389238A (en) * | 2022-08-22 | 2022-11-25 | 楚岳(惠州)热传科技有限公司 | Radiator performance test system and test method |
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Effective date of registration: 20200714 Address after: Room 2a-1, building 10, lanxigu, Banshan Haijing, Yanshan Road, Shekou street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen yingkangteng Industrial Control Technology Co.,Ltd. Address before: 518000 impression home of Nanshan District, Guangdong, Shenzhen Patentee before: Guo Yilong |
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Granted publication date: 20131120 |