CN209157099U - Vacuum pressure casting machine casting temperature measuring device - Google Patents
Vacuum pressure casting machine casting temperature measuring device Download PDFInfo
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- CN209157099U CN209157099U CN201821771262.8U CN201821771262U CN209157099U CN 209157099 U CN209157099 U CN 209157099U CN 201821771262 U CN201821771262 U CN 201821771262U CN 209157099 U CN209157099 U CN 209157099U
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- 238000005266 casting Methods 0.000 title claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims description 28
- 239000003381 stabilizer Substances 0.000 claims description 16
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 3
- 238000005259 measurement Methods 0.000 abstract description 7
- 230000002452 interceptive effect Effects 0.000 abstract description 5
- 238000011897 real-time detection Methods 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000000523 sample Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 8
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The vacuum pressure casting machine casting temperature measuring device of the utility model, current-to-voltage converting circuit connect bandwidth-limited circuit, and bandwidth-limited circuit connects voltage regulator circuit；Interference and other measure signal interferences are influenced when effective solution MIK-AL infrared temperature probe is run by vacuum pressure casting machine, cause to measure inaccurate problem.The utility model casts the temperature of raw material founding in pot by the infrared sensor X1 real-time detection of model MIK-AL, export 4-20mA current signal, 0V-+5V voltage signal is converted to through current-to-voltage convertor, low-pass filter filters out extraneous High-frequency Interference, it adjusts after circuit is adjusted and exports voltage signal within the scope of 0V-+5V, improve the precision of signal acquisition, after through LC filter circuit filter out outside noise interference, bandpass filter frequency-selecting, voltage regulator circuit is output to after avoiding other frequency signals from interfering, eliminate the signal of minor fluctuations near 0V-+5V voltage signal, stable 0V-+5V voltage signal is exported to temperature control system, improve the precision of temperature signal measurement.
Description
Technical field
The utility model relates to casting machine technical fields, especially vacuum pressure casting machine casting temperature measuring device.
Background technique
When vacuum pressure casting machine founding raw material, temperature is very high, and (fusion temperature of such as mild steel is 1420 degree to 1450
Degree), common temperature transducer thermistor, infrared sensor temperature-measuring range are limited, it is difficult to measure, MIK-AL infrared measurement of temperature passes
Although sensor is capable of measuring the high temperature of 0-2000 degree, but its measuring signal is by interference when the operation of vacuum pressure casting machine and other measurements
The influence of signal (such as air pressure, vacuum degree) interference will cause there are error and measure inaccurate problem.
Therefore the utility model provides a kind of new scheme to solve the problems, such as this.
Utility model content
In view of the deficienciess of the prior art, the utility model aim is to provide the measurement of vacuum pressure casting machine casting temperature
Device, interference and other measuring signals when effective solution MIK-AL infrared temperature probe is run by vacuum pressure casting machine
The influence of interference causes to measure inaccurate problem.
Its technical solution solved is, including current-to-voltage converting circuit, bandwidth-limited circuit, voltage regulator circuit, feature
It is, current-to-voltage converting circuit connects bandwidth-limited circuit, and bandwidth-limited circuit connects voltage regulator circuit；
The current-to-voltage converting circuit includes infrared sensor X1, and the one of the pin 1 of infrared sensor X1 and capacitor C1
End connection power supply+12V, the pin 3 of infrared sensor X1 connect ground, the pin 2 of infrared sensor X1 with the other end of capacitor C1
Connect one end of resistance R1, the other end of resistance R1 be separately connected one end of resistance R2, one end of resistance R3, voltage-stabiliser tube Z1 it is negative
Pole, the upper end and adjustable end of the other end connection potentiometer RP1 of resistance R2, the other end of resistance R3 are separately connected the one of capacitor C2
It holds, one end of resistance R5, the anode of voltage-stabiliser tube Z1, the lower end of potentiometer RP1, the other end of capacitor C2, the left end of resistance R4 are equal
Connection ground, the other end of resistance R5 are separately connected one end of the base stage of triode Q2, resistance R6, the collector connection of triode Q2
The right end of the emitter connection resistance R4 of power supply+0.5V, triode Q2, the other end of resistance R6 are separately connected the base of triode Q1
Pole, resistance R7 one end, the collector of triode Q1 connects power supply+5V, and the emitter connection resistance R7's of triode Q1 is another
End.
The utility model is skillfully constructed, raw material founding in the infrared sensor X1 real-time detection casting pot of model MIK-AL
Temperature, export 4-20mA current signal, be converted to 0V-+5V voltage signal through current-to-voltage convertor, low-pass filter filters out
Extraneous High-frequency Interference exports voltage signal within the scope of 0V-+5V after adjusting circuit adjusting, improves the precision of signal acquisition, later
Outside noise interference, bandpass filter frequency-selecting are filtered out through LC filter circuit, is output to pressure stabilizing after avoiding other frequency signals from interfering
Circuit eliminates the signal of minor fluctuations near 0V-+5V voltage signal, exports stable 0V-+5V voltage signal and controls to temperature
System improves the precision of temperature signal measurement.
Detailed description of the invention
Fig. 1 is the circuit connection module map of the utility model.
Fig. 2 is the circuit connection schematic diagram of the utility model.
Specific embodiment
For aforementioned and other technology contents, feature and effect in relation to the utility model, following cooperation with reference to figures 1 through
Fig. 2 can be clearly presented in the detailed description of embodiment.The structure content being previously mentioned in following embodiment is to say
Bright book attached drawing is reference.
Each exemplary embodiment of the utility model is described below with reference to accompanying drawings.
Embodiment one, vacuum pressure casting machine casting temperature measuring device, current-to-voltage converting circuit pass through model
Temperature in the infrared sensor X1 real-time detection casting pot of MIK-AL, exports 4-20mA current signal, converts through Current Voltage
Device is converted to 0V-+5V voltage signal, low-pass filter filters out extraneous High-frequency Interference, adjusting circuit exports 0V-+5V model after adjusting
Interior voltage signal is enclosed, the precision of signal acquisition is improved, enters bandwidth-limited circuit later, filters out the external world through LC filter circuit and make an uproar
Acoustic jamming, bandpass filter frequency-selecting are output to voltage regulator circuit after avoiding other frequency signals from interfering, eliminate 0V-+5V voltage signal
The signal of neighbouring minor fluctuations, exports stable 0V-+5V voltage signal to temperature control system, improves temperature signal measurement
Precision；
The current-to-voltage converting circuit is cast in pot by the infrared sensor X1 real-time detection of model MIK-AL
Temperature exports 4-20mA current signal, and the Current Voltage through voltage-stabiliser tube Z1, resistance R1, resistance R2, potentiometer RP1 composition is converted
Device is converted to 0V-+5V voltage signal the voltage range of the adjustable conversion of potentiometer RP1 (adjust), enter later resistance R3 and
Capacitor C2 composition low-pass filter filters out the adjusting circuit output that extraneous High-frequency Interference, triode Q1 and triode Q2 are core
Voltage signal within the scope of 0V-+5V, specifically when voltage is higher than in+5V, triode Q2 conducting divides through resistance R4 and filters off letter
Number it is higher than the voltage of+5V, when current potential is lower than 0V, triode Q1 conducting, the output of power supply 0V offset voltage, including infrared sensor
The pin 1 of X1, infrared sensor X1 connect power supply+12V, the pin 3 and capacitor C1 of infrared sensor X1 with one end of capacitor C1
The other end connect ground, the pin 2 of infrared sensor X1 connects one end of resistance R1, and the other end of resistance R1 is separately connected resistance
One end of R2, one end of resistance R3, voltage-stabiliser tube Z1 cathode, the other end connection upper end of potentiometer RP1 of resistance R2 and adjustable
End, the other end of resistance R3 are separately connected one end of one end of capacitor C2, resistance R5, the anode of voltage-stabiliser tube Z1, potentiometer RP1
Lower end, the other end of capacitor C2, resistance R4 left end be all connected with ground, the other end of resistance R5 is separately connected the base of triode Q2
Pole, resistance R6 one end, the collector of triode Q2 connects power supply+0.5V, the right side of the emitter connection resistance R4 of triode Q2
End, the other end of resistance R6 are separately connected one end of the base stage of triode Q1, resistance R7, and the collector of triode Q1 connects power supply
The other end of the emitter connection resistance R7 of+5V, triode Q1.
Embodiment two, on the basis of example 1, the bandwidth-limited circuit are used for current-to-voltage converting circuit is defeated
0V-+5V voltage signal out, the LC filter circuit formed through inductance L1, capacitor C3 filter out outside noise interference, put again through operation
The bandpass filter frequency-selecting of big device AR1, resistance R8-R10, capacitor C4, capacitor C5 composition, only allow the frequency of 0V-+5V voltage signal
Rate passes through, and blocks the signal other than the frequency range, that is, exports after avoiding other frequency signals from interfering, including inductance L1, inductance
The emitter of the left end connecting triode Q1 of L1, the right end of inductance L1 be separately connected one end of ground capacity C3, resistance R8 one
End, the other end of resistance R8 be separately connected one end of ground resistance R9, one end of capacitor C4, capacitor C5 one end, capacitor C5's
The other end is separately connected one end of the inverting input terminal of operational amplifier AR1, resistance R10, and the other end of capacitor C4 is separately connected
The output end of the other end of resistance R10, operational amplifier AR1, the non-inverting input terminal of operational amplifier AR1 connect ground with the end gnd.
Embodiment three, on the basis of example 1, the voltage regulator circuit are used to eliminate the 0V- of bandwidth-limited circuit output
The signal of minor fluctuations near+5V voltage signal, exports stable 0V-+5V voltage signal, and specific triode Q3 is adjustment
Pipe, resistance R11, voltage-stabiliser tube Z3 provide bias voltage for triode Q3, and the voltage signal of triode Q3 output is filtered through inductance L1,
Stable accurate voltage signal, which is exported, after the delay circuit delay 0.3S of resistance R12, capacitor C6 composition is transferred to temperature control system
(can be vacuum pressure casting machine casting temperature control device to realize temperature control), another way enters operational amplifier AR2's
Non-inverting input terminal carries out difference operation, output voltage difference feedback with the signal that inverting input terminal bandwidth-limited circuit transmits
To triode Q3 base stage, stable adjusting triode Q3 output voltage, including triode Q1, resistance R11, the current collection of triode Q1
Pole connects the output end of operational amplifier AR1 with one end of resistance R11, and the emitter of triode Q1 connects one end of inductance L1,
One end of the other end connection resistance R12 of inductance L1, the other end of resistance R12 are separately connected one end of ground capacity C3, operation
Non-inverting input terminal, the temperature control system of amplifier AR2, the one of the inverting input terminal connection resistance R13 of operational amplifier AR2
End, the collector of the other end connecting triode Q1 of resistance R13, the output end connection voltage-stabiliser tube Z2's of operational amplifier AR2 is negative
Pole, the anode of voltage-stabiliser tube Z2 be separately connected the base stage of triode Q3, the cathode of voltage-stabiliser tube Z3, resistance R11 the other end, voltage-stabiliser tube
The anode connection ground of Z3.
The utility model carry out using when, cast by the infrared sensor X1 real-time detection of model MIK-AL
Temperature in pot exports 4-20mA current signal, electric through voltage-stabiliser tube Z1, resistance R1, resistance R2, the electric current of potentiometer RP1 composition
Pressure converter is converted to 0V-+5V voltage signal, enters resistance R3 and capacitor C2 composition low-pass filter later and filters out extraneous high frequency
Interference, triode Q1 and triode Q2 are voltage signal within the scope of the adjusting circuit output 0V-+5V of core, through inductance L1, capacitor
The LC filter circuit of C3 composition filters out outside noise interference, again through operational amplifier AR1, resistance R8-R10, capacitor C4, capacitor C5
The bandpass filter frequency-selecting of composition only allows the frequency of 0V-+5V voltage signal to pass through, blocks the signal other than the frequency range,
It is output to voltage regulator circuit after avoiding other frequency signals from interfering, eliminates the signal of minor fluctuations near 0V-+5V voltage signal,
Stable 0V-+5V voltage signal is exported to temperature control system, improves the precision of temperature signal measurement.
Claims (3)
1. vacuum pressure casting machine casting temperature measuring device, including current-to-voltage converting circuit, bandwidth-limited circuit, pressure stabilizing electricity
Road, which is characterized in that current-to-voltage converting circuit connects bandwidth-limited circuit, and bandwidth-limited circuit connects voltage regulator circuit；
The current-to-voltage converting circuit includes infrared sensor X1, and the pin 1 of infrared sensor X1 and one end of capacitor C1 connect
Power supply+12V is met, the pin 3 of infrared sensor X1 connects ground with the other end of capacitor C1, and the pin 2 of infrared sensor X1 connects
One end of resistance R1, the other end of resistance R1 be separately connected one end of resistance R2, one end of resistance R3, voltage-stabiliser tube Z1 cathode,
Resistance R2 the other end connection potentiometer RP1 upper end and adjustable end, the other end of resistance R3 be separately connected capacitor C2 one end,
One end of resistance R5, the anode of voltage-stabiliser tube Z1, the lower end of potentiometer RP1, the other end of capacitor C2, resistance R4 left end be all connected with
Ground, the other end of resistance R5 are separately connected one end of the base stage of triode Q2, resistance R6, and the collector of triode Q2 connects power supply
+ 0.5V, triode Q2 emitter connection resistance R4 right end, the other end of resistance R6 be separately connected triode Q1 base stage,
One end of resistance R7, the collector of triode Q1 connect power supply+5V, the other end of the emitter connection resistance R7 of triode Q1.
2. vacuum pressure casting machine casting temperature measuring device according to claim 1, which is characterized in that the band logical filter
Wave circuit includes inductance L1, and the emitter of the left end connecting triode Q1 of inductance L1, it is electric that the right end of inductance L1 is separately connected ground connection
Hold one end of one end of C3, resistance R8, the other end of resistance R8 be separately connected one end of ground resistance R9, capacitor C4 one end,
One end of capacitor C5, the other end of capacitor C5 are separately connected one end of the inverting input terminal of operational amplifier AR1, resistance R10, electricity
The other end for holding C4 is separately connected the output end of the other end of resistance R10, operational amplifier AR1, the same phase of operational amplifier AR1
Input terminal connects ground with the end gnd.
3. vacuum pressure casting machine casting temperature measuring device according to claim 1, which is characterized in that the pressure stabilizing electricity
Road includes triode Q1, resistance R11, and the collector of triode Q1 connects the output of operational amplifier AR1 with one end of resistance R11
End, one end of the emitter connection inductance L1 of triode Q1, one end of the other end connection resistance R12 of inductance L1, resistance R12's
The other end is separately connected one end of ground capacity C3, the non-inverting input terminal of operational amplifier AR2, temperature control system, and operation is put
One end of the inverting input terminal connection resistance R13 of big device AR2, the collector of the other end connecting triode Q1 of resistance R13, operation
The cathode of the output end connection voltage-stabiliser tube Z2 of amplifier AR2, the anode of voltage-stabiliser tube Z2 are separately connected the base stage of triode Q3, pressure stabilizing
The other end of the cathode of pipe Z3, resistance R11, the anode connection ground of voltage-stabiliser tube Z3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821771262.8U CN209157099U (en) | 2018-10-30 | 2018-10-30 | Vacuum pressure casting machine casting temperature measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821771262.8U CN209157099U (en) | 2018-10-30 | 2018-10-30 | Vacuum pressure casting machine casting temperature measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209157099U true CN209157099U (en) | 2019-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821771262.8U Expired - Fee Related CN209157099U (en) | 2018-10-30 | 2018-10-30 | Vacuum pressure casting machine casting temperature measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209157099U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112612309A (en) * | 2021-01-25 | 2021-04-06 | 郑州财经学院 | Temperature control device of router |
| CN112738653A (en) * | 2021-01-25 | 2021-04-30 | 郑州财经学院 | Heating detection device of router |
-
2018
- 2018-10-30 CN CN201821771262.8U patent/CN209157099U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112612309A (en) * | 2021-01-25 | 2021-04-06 | 郑州财经学院 | Temperature control device of router |
| CN112738653A (en) * | 2021-01-25 | 2021-04-30 | 郑州财经学院 | Heating detection device of router |
| CN112612309B (en) * | 2021-01-25 | 2021-10-15 | 郑州财经学院 | A temperature control device for a router |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190726 Termination date: 20211030 |
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| CF01 | Termination of patent right due to non-payment of annual fee |