CN211955279U - High-precision carbon-silicon instrument - Google Patents
High-precision carbon-silicon instrument Download PDFInfo
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- CN211955279U CN211955279U CN202020521865.3U CN202020521865U CN211955279U CN 211955279 U CN211955279 U CN 211955279U CN 202020521865 U CN202020521865 U CN 202020521865U CN 211955279 U CN211955279 U CN 211955279U
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- thermocouple
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- display screen
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- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
- 230000003750 conditioning effect Effects 0.000 claims abstract description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 238000001514 detection method Methods 0.000 claims description 18
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 238000005516 engineering process Methods 0.000 claims description 8
- 239000003086 colorant Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 238000009529 body temperature measurement Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000002076 thermal analysis method Methods 0.000 description 1
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Abstract
The utility model relates to a high accuracy carbon silicon appearance, its characterized in that: the device comprises a shell, a mainboard, a display screen, a calibration potentiometer and a switching power supply; the main board and the switching power supply are arranged in the shell, the display screen is embedded in the side wall of the shell, and the adjusting end of the calibration potentiometer penetrates out of the side wall of the shell; the input end of the main board is externally connected with a thermocouple, the display screen and the calibration potentiometer are electrically connected to the main board, the input end of the switching power supply is externally connected with alternating current, and the output end of the switching power supply is connected to the power supply end of the main board; the main board comprises a main control module, a thermocouple signal conditioning module, a signal matching module and a voltage conversion module, wherein the input end of the thermocouple signal conditioning module is externally connected with a thermocouple to obtain a thermocouple signal, the output end of the thermocouple signal conditioning module is connected with the input end of the main control module, and the signal matching module is electrically connected with the display screen and the main control module. The utility model discloses it is high to detect the precision.
Description
Technical Field
The utility model relates to a high accuracy carbon silicon appearance.
Background
The carbon-silicon thermal analysis technology for the quality of the molten iron is derived from a phase diagram theory in the metallurgy, is widely used for detecting and controlling the molten iron in front of the furnace in developed countries, is an indispensable detection means in the advanced casting technology, and plays an important role in the production of high-quality castings;
the existing carbon-silicon instrument usually uses a thermocouple to collect data, and a detection result is displayed through a nixie tube; the existing carbon-silicon instrument has lower detection precision.
Disclosure of Invention
The utility model aims at providing a high accuracy carbon silicon appearance detects the precision height.
For solving the above technical problem, the technical scheme of the utility model is that: the high-precision carbon-silicon instrument comprises a shell, a mainboard, a display screen, a calibration potentiometer and a switching power supply; the main board and the switching power supply are arranged in the shell, the display screen is embedded in the side wall of the shell, and the adjusting end of the calibration potentiometer penetrates out of the side wall of the shell; the input end of the main board is externally connected with a thermocouple, the display screen and the calibration potentiometer are electrically connected to the main board, the input end of the switching power supply is externally connected with alternating current, and the output end of the switching power supply is connected to the power supply end of the main board; the main board comprises a main control module, a thermocouple signal conditioning module, a signal matching module and a voltage conversion module, wherein the input end of the thermocouple signal conditioning module is externally connected with a thermocouple to obtain a thermocouple signal, the output end of the thermocouple signal conditioning module is connected with the input end of the main control module, the signal matching module is electrically connected with the display screen and the main control module, the input end of the voltage conversion module is connected with the switching power supply, and the output end of the voltage conversion module is connected with the power supply ends of the main control module, the thermocouple signal conditioning module, the signal matching module.
According to the scheme, the thermocouple signal conditioning module adopts a 24-bit analog-to-digital converter with the model number of ADS 1220; the device is capable of performing conversion at a sampling data rate of up to 2000 times/second and is capable of settling within a single cycle; the device has the advantages of low power consumption, low noise, highest sampling rate of 2KHz, synchronous suppression function of power frequency noise of 50Hz and 60Hz, high detection precision and high conversion rate.
According to the scheme, the calibration potentiometer is a WXD3-13-2W potentiometer, is used for carrying out detection precision calibration before the thermocouple is placed into molten iron, and is used for calibrating the measurement accuracy of an instrument according to the standard temperature and providing a basis for subsequent accurate measurement.
Preferably, the calibration potentiometer comprises a first potentiometer and a second potentiometer, the first potentiometer is used for calibrating the ambient temperature, and the calibration process is as follows: if the room temperature is 30 ℃, and the temperature measured by the temperature sensor is 26-28 ℃, adjusting the first potentiometer to enable the temperature on the display screen to be consistent with the room temperature; the second potentiometer is used for calibrating the temperature of the molten metal, and the adjusting process is as follows: preparing a thermometer which does not need to be calibrated and a carbon-silicon instrument to be calibrated, simultaneously inserting the thermometer and the carbon-silicon instrument to be calibrated into the molten metal for measuring the temperature, if the temperature measured by the thermometer which does not need to be calibrated is 1000 ℃, and the temperature measured by the thermometer to be calibrated is 980 ℃, adjusting the second potentiometer to enable the temperature on the display screen of the carbon-silicon instrument to be calibrated to be consistent with the temperature measured by the thermometer which does not need to be calibrated, repeating the operation for many times, and completing the calibration.
According to the scheme, the carbon silicon instrument further comprises a dial switch electrically connected with the main control module to adjust the temperature measurement range, different keys on the dial switch correspond to different temperature measurement ranges, the carbon silicon instrument is suitable for different high-temperature molten metals, and a proper temperature measurement range is selected for different molten metals, so that the detection precision is improved.
According to the scheme, the display screen is an F series 7-inch serial port screen which is manufactured by Guangzhou large-color photoelectric technology limited company and has the model number of DC80480F 070; an embedded real-time operating system is embedded in the serial port screen, the serial port screen can work reliably without power failure for 24 x 365h continuously, and garbage redundant files are avoided.
According to the scheme, the switching power supply adopts an AC-DC switching power supply produced by Honghai science and technology company, and the model is JMD 30-12; the switching power supply is used for converting 220V alternating current into 12V direct current voltage, the positive voltage and the negative voltage do not exceed 0.5V, and the switching power supply is high in accuracy and good in stability.
According to the scheme, the main control module adopts an STC12C5A60-PLCC44 single chip microcomputer which has the characteristics of high speed, low power consumption and ultra-strong anti-interference performance, and the instruction codes are completely compatible with the conventional 8051 but the speed is 8-12 times faster; the special reset circuit for MAX810, 2-path PWM and 8-path high-speed 10-bit A/D conversion are integrated inside, so that the method can be used in strong interference occasions and improve the detection precision.
According to the scheme, the signal matching module adopts the MAX232 chip to carry out 232 level conversion so as to realize serial communication between the main control module and the display screen, and the signal matching module is low in power consumption and high in performance.
According to the scheme, the carbon-silicon instrument further comprises a first indicator light, a second indicator light and a third indicator light which are arranged on the side wall of the shell and electrically connected with the main control module, and when the thermocouple connection is normal and molten iron is not detected, the first indicator light is on; when the thermocouple is placed in molten iron for detection, the second indicator light is on; when the thermocouple detection is finished and data is acquired, a third indicator light is turned on; first pilot lamp, second pilot lamp and third pilot lamp during operation play the sign effect for different colours, make things convenient for operating personnel to see the detection process directly perceivedly.
The utility model discloses following beneficial effect has:
the utility model adopts the thermocouple signal conditioning module to perform signal conditioning and analog-to-digital conversion on the data acquired by the thermocouple, thereby having low power consumption, suppressing noise and improving detection precision; the calibration potentiometer is used for calibrating the detection precision before the thermocouple is placed into molten iron, and is used for calibrating the measurement accuracy of the instrument according to the standard temperature and providing a basis for subsequent accurate measurement; the utility model discloses take care of the thermocouple signal through thermocouple signal conditioning module and export after analysis through the main control module, take care of and communicate the signal between display screen and the main control module through the signal matching module, information transmission matching degree is high; the utility model discloses signal processing is fast, and it is high to detect the precision.
Drawings
FIG. 1 is a block diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic view of the overall appearance structure of the embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of the main control module in this embodiment;
FIG. 4 is a schematic diagram of a circuit connection of the thermocouple signal conditioning module in this embodiment;
FIG. 5 is a schematic diagram of the circuit connection of the calibration potentiometer in this embodiment;
FIG. 6 is a schematic circuit diagram of a signal matching module in the present embodiment;
fig. 7 is a schematic circuit diagram of the dip switch in this embodiment.
Reference numerals: 1. a housing; 2. a main board; 3. a display screen; 4. a switching power supply; 5. calibrating a potentiometer; 6. a first indicator light; 7. a second indicator light; 8. a third indicator light; 9. a power interface; 10. a thermocouple interface; 11. a dial switch.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 7, the present invention is a high precision carbon silicon instrument, which includes a housing 1, a main board 2, a display screen 3, a calibration potentiometer 5 and a switching power supply 4; the main board 2 and the switching power supply 4 are both arranged in the shell 1, the display screen 3 is embedded in the side wall of the shell 1, and the adjusting end of the calibration potentiometer 5 penetrates through the side wall of the shell 1; the input end of the mainboard 2 is externally connected with a thermocouple, the display screen 3 and the calibration potentiometer 5 are both electrically connected with the mainboard 2, the input end of the switch power supply 4 is externally connected with alternating current, and the output end is connected with the power supply end of the mainboard 2; the main board 2 comprises a main control module, a thermocouple signal conditioning module, a signal matching module and a voltage conversion module, wherein the input end of the thermocouple signal conditioning module is externally connected with a thermocouple to obtain a thermocouple signal, the output end of the thermocouple signal conditioning module is connected with the input end of the main control module, the signal matching module is electrically connected with the display screen 3 and the main control module, the input end of the voltage conversion module is connected with the switching power supply 4, and the output end of the voltage conversion module is connected with the power ends of the main control module, the thermocouple signal conditioning module, the signal matching module and.
The side wall of the shell 1 is provided with a power interface 9 for externally connecting alternating current and a thermocouple interface 10 for externally connecting a thermocouple, the power interface 9 is connected to the input end of the switching power supply 4 for inputting 220V alternating current, and the thermocouple interface 10 is connected to the input end of the thermocouple signal conditioning module in the mainboard 2 for inputting detected thermocouple signals to the mainboard 2.
The switching power supply 4 is used for converting 220V alternating current into 12V direct current voltage, and the switching power supply 4 is an AC-DC switching power supply 4 which is manufactured by Honghai science and technology company and has the model number of JMD 30-12.
The voltage conversion module comprises a first voltage conversion unit and a second voltage conversion unit, wherein the first voltage conversion unit is used for providing working voltage for the main control module, the thermocouple signal conditioning module and the signal matching module, and the second voltage conversion unit is used for providing working voltage for the display screen 3; in the embodiment, the first voltage conversion unit converts 12V direct current into +5V direct current through the LM2596 adjustable voltage reducer, converts the 12V direct current into +3.3V direct current through the AMS1117-3.3V linear voltage stabilizer, and converts the +5V direct current into-5V direct current through the LMC7660 low-power polarity reversal power converter. Because the display screen 3 consumes more power, the second voltage conversion unit is used for providing working voltage for the display screen 3 alone, in the embodiment, the second voltage conversion unit adopts an XL1509 step-down DC-DC converter to convert 12V direct current into +5V direct current, the conversion efficiency is high, the converter has excellent linearity and load regulation rate, and an overheat turn-off protection function and a secondary current-limiting protection function are built in the converter; in some embodiments, a PMOS transistor electrically connected to the main control module may be further disposed between the output terminal of the XL1509 converter and the power source terminal of the display screen 3 for performing timing control, the display screen 3 does not start to operate when the switching power supply 4 of the carbon silicon instrument is turned on, and the main control module sends a control signal of the display screen 3 to supply power to the display screen 3, so as to reduce power consumption.
Referring to fig. 3, the main control module adopts a minimum working system of a STC12C5a60-PLCC44 singlechip.
The input end of the thermocouple signal conditioning module is connected to the thermocouple interface 10 to obtain thermocouple data, performs analog-to-digital conversion on the thermocouple data, and sends the thermocouple data to the main control module, referring to fig. 4, the interfaces J2-1 and J2-2 are used for inputting thermocouple data, the thermocouple signal conditioning module adopts a 24-bit analog-to-digital converter, the model is ADS1220, and the device can perform conversion at a sampling data rate of up to 2000 times/second and is stable in a single period; the device has the advantages of low power consumption, low noise, highest sampling rate of 2KHz, synchronous suppression function of power frequency noise of 50Hz and 60Hz, high detection precision and high conversion rate. The thermocouple signal conditioning module is also provided with a thermocouple cold end reference circuit formed by a digital temperature sensor DS18B20, and the thermocouple cold end reference circuit is used for acquiring a cold end reference value of the thermocouple and inputting the cold end reference value into the main control module.
Referring to fig. 1 and 5, the calibration potentiometer 5 is electrically connected to the main control module, and a knob end of the calibration potentiometer 5 penetrates through a side wall of the housing 1; the calibration potentiometer 5 is used for performing detection precision calibration before the thermocouple is placed in molten iron, and provides a basis for subsequent accurate measurement, and the type adopted in the embodiment is a WXD3-13-2W potentiometer.
Referring to fig. 6, the signal matching module adopts a MAX232 chip to perform 232 level conversion to realize serial communication between the main control module and the display screen 3, and the output end of the signal matching module is connected to the signal end of the display screen 3 through interfaces J10 and J11. The display screen 3 adopts an F series 7-inch serial port screen produced by Guangzhou large-color photoelectric technology limited company, the model is DC80480F070, and keys and key circuits are not required to be arranged during parameter setting, so that the structure is simple.
Referring to fig. 7, the embodiment of the utility model provides a still including locating in shell 1 and the electricity connect in master control module is used for adjusting the dial switch 11 of temperature measurement scope, the different temperature measurement scopes of key correspondence difference on dial switch 11 are suitable for different high temperature molten metal, to different molten metal, select suitable temperature measurement scope, improve and detect the precision.
In this embodiment, the carbon-silicon instrument further comprises a first indicator light 6, a second indicator light 7 and a third indicator light 8 which are arranged on the side wall of the shell 1 and electrically connected to the main control module, and when the thermocouple connection is normal and molten iron is not detected, the first indicator light 6 is on; when the thermocouple is placed in molten iron for detection, the second indicator light 7 is turned on; when the thermocouple detection is finished to obtain data, the third indicator light 8 is turned on; the first indicator light 6, the second indicator light 7 and the third indicator light 8 play a role in marking different colors during working, the first indicator light 6 is a green indicator light, the second indicator light 7 is a yellow indicator light, and the third indicator light 8 is a red indicator light.
The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and it is not to be understood that the specific embodiments of the present invention are limited to these descriptions. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (9)
1. A high accuracy carbon silicon appearance which characterized in that: the device comprises a shell, a mainboard, a display screen, a calibration potentiometer and a switching power supply; the main board and the switching power supply are arranged in the shell, the display screen is embedded in the side wall of the shell, and the adjusting end of the calibration potentiometer penetrates out of the side wall of the shell; the input end of the main board is externally connected with a thermocouple, the display screen and the calibration potentiometer are electrically connected to the main board, the input end of the switching power supply is externally connected with alternating current, and the output end of the switching power supply is connected to the power supply end of the main board;
the main board comprises a main control module, a thermocouple signal conditioning module, a signal matching module and a voltage conversion module, wherein the input end of the thermocouple signal conditioning module is externally connected with a thermocouple to obtain a thermocouple signal, the output end of the thermocouple signal conditioning module is connected with the input end of the main control module, the signal matching module is electrically connected with the display screen and the main control module, the input end of the voltage conversion module is connected with the switching power supply, and the output end of the voltage conversion module is connected with the power supply ends of the main control module, the thermocouple signal conditioning module, the signal matching module.
2. The high-precision carbon silicon instrument according to claim 1, wherein: the thermocouple signal conditioning module adopts a 24-bit analog-to-digital converter with the model number of ADS 1220.
3. The high-precision carbon silicon instrument according to claim 1, wherein: the calibration potentiometer adopts a WXD3-13-2W potentiometer.
4. The high-precision carbon silicon instrument according to claim 1, wherein: the carbon-silicon instrument also comprises a dial switch electrically connected with the main control module for adjusting the temperature measuring range.
5. The high-precision carbon silicon instrument according to claim 1, wherein: the display screen is an F series 7-inch serial port screen which is manufactured by Guangzhou large-color photoelectric technology limited company and has the model of DC80480F 070.
6. The high-precision carbon silicon instrument according to claim 1, wherein: the switching power supply adopts an AC-DC switching power supply produced by Honghai technology company, and the model is JMD 30-12.
7. The high-precision carbon silicon instrument according to claim 1, wherein: the main control module adopts an STC12C5A60-PLCC44 singlechip.
8. The high-precision carbon silicon instrument according to claim 1, wherein: the signal matching module adopts a MAX232 chip to carry out 232 level conversion so as to realize serial communication between the main control module and the display screen.
9. The high-precision carbon silicon instrument according to claim 1, wherein: the carbon-silicon instrument also comprises a first indicator light, a second indicator light and a third indicator light which are arranged on the side wall of the shell and electrically connected with the main control module, and when the thermocouple connection is normal and molten iron is not detected, the first indicator light is on; when the thermocouple is placed in molten iron for detection, the second indicator light is on; when the thermocouple detection is finished and data is acquired, a third indicator light is turned on; the first indicator light, the second indicator light and the third indicator light are used for marking different colors when working.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020521865.3U CN211955279U (en) | 2020-04-10 | 2020-04-10 | High-precision carbon-silicon instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020521865.3U CN211955279U (en) | 2020-04-10 | 2020-04-10 | High-precision carbon-silicon instrument |
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| Publication Number | Publication Date |
|---|---|
| CN211955279U true CN211955279U (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020521865.3U Expired - Fee Related CN211955279U (en) | 2020-04-10 | 2020-04-10 | High-precision carbon-silicon instrument |
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| Country | Link |
|---|---|
| CN (1) | CN211955279U (en) |
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2020
- 2020-04-10 CN CN202020521865.3U patent/CN211955279U/en not_active Expired - Fee Related
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Granted publication date: 20201117 |
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