CN211904446U - Handheld smelting temperature measuring instrument - Google Patents
Handheld smelting temperature measuring instrument Download PDFInfo
- Publication number
- CN211904446U CN211904446U CN202020602401.5U CN202020602401U CN211904446U CN 211904446 U CN211904446 U CN 211904446U CN 202020602401 U CN202020602401 U CN 202020602401U CN 211904446 U CN211904446 U CN 211904446U
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- CN
- China
- Prior art keywords
- main control
- liquid crystal
- unit
- display
- thermocouple
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000003723 Smelting Methods 0.000 title claims description 8
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 43
- 230000003750 conditioning effect Effects 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims description 16
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 10
- 229910052744 lithium Inorganic materials 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 230000007613 environmental effect Effects 0.000 claims description 2
- 238000009529 body temperature measurement Methods 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 241001417490 Sillaginidae Species 0.000 abstract description 2
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 150000002739 metals Chemical class 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The utility model relates to a molten iron temperature measurement field especially relates to a handheld thermoscope that smelts, its characterized in that: the device comprises a shell, a main control panel, a display panel, a liquid crystal screen, a buzzer and a power supply; the main control panel, the display panel and the power supply are all arranged in the shell, and the liquid crystal screen and the buzzer are all embedded on the shell; the main control board comprises a main control unit and a thermocouple signal conditioning unit; the signal input end of the thermocouple signal conditioning unit is used for receiving thermocouple signals, the signal output end of the thermocouple signal conditioning unit is connected to the input end of the main control unit, and the output end of the main control unit is connected to the display panel and the buzzer; the display panel includes a signal voltage matching unit and a display driving unit; the signal voltage matching unit is connected to the main control unit and used for transmitting signals, the signal voltage matching unit is connected to the display driving unit, and the output end of the display driving unit is connected to the liquid crystal screen. The utility model discloses parameter display is comprehensive, stability is good.
Description
Technical Field
The utility model relates to a molten iron temperature measurement field especially relates to a handheld thermoscope of smelting.
Background
The portable smelting thermodetector is a high-precision special thermodetector which is developed for rapidly measuring the temperature of molten metal in the smelting process in the industries of smelting, casting and the like; the existing thermodetector generally adopts a thermocouple to acquire data, and a detection result is displayed through a nixie tube, so that the displayed parameters are single;
in view of the above, it is an urgent problem in the art to provide a portable melting thermometer to overcome the above drawbacks.
Disclosure of Invention
The utility model aims at providing a handheld thermoscope that smelts, parameter display is comprehensive, stability is good.
For solving the above technical problem, the technical scheme of the utility model is that: a handheld smelting temperature measuring instrument comprises a shell, a main control panel, a display panel, a liquid crystal display, a buzzer and a power supply; the main control board, the display board and the power supply are all arranged in the shell, the liquid crystal screen and the buzzer are all embedded on the shell, and the power supply is used for supplying power to the main control board, the display board, the liquid crystal screen and the buzzer; the main control board comprises a main control unit and a thermocouple signal conditioning unit; the signal input end of the thermocouple signal conditioning unit is used for receiving thermocouple signals, the signal output end of the thermocouple signal conditioning unit is connected to the input end of the main control unit, and the output end of the main control unit is connected to the display panel and the buzzer; the display panel includes a signal voltage matching unit and a display driving unit; the signal voltage matching unit is connected to the main control unit and used for transmitting signals, the signal voltage matching unit is connected to the display driving unit, and the output end of the display driving unit is connected to the liquid crystal screen.
According to the scheme, the liquid crystal display screen adopts an LX128 12864T liquid crystal display screen produced by force-first-order electronics limited company, and is small, exquisite, light, convenient to use, clear in display, low in power consumption and strong in stability.
According to the scheme, the display panel further comprises a liquid crystal screen backlight driving unit, the input end of the liquid crystal screen backlight driving unit is connected to the display driving unit, and the output end of the liquid crystal screen backlight driving unit is connected to the liquid crystal screen, so that data on the liquid crystal screen can be displayed more clearly.
According to the scheme, the display panel further comprises a display voltage conversion circuit which is used for converting the power supply voltage to provide working voltage for the signal voltage matching unit, the display driving unit and the liquid crystal screen backlight driving unit.
According to the scheme, the thermocouple signal conditioning unit comprises an analog-to-digital conversion circuit and a thermocouple cold end reference circuit, the analog-to-digital conversion circuit is used for being externally connected with a thermocouple and outputting a thermocouple signal to the main control unit after being subjected to analog-to-digital conversion, the thermocouple cold end reference circuit comprises a temperature sensor which is used for detecting the ambient temperature to generate thermocouple cold end reference voltage and outputting the thermocouple cold end reference voltage to the main control unit, and the temperature sensor is preferably selectedDS18B20Number ofA temperature sensor.
According to the scheme, the main control unit adopts an STC15W1K-SOP28 single chip microcomputer.
According to the scheme, the power supply is a rechargeable lithium battery, the rechargeable lithium battery is provided with a charging interface, and the charging interface is arranged on the shell.
According to the scheme, the shell is further embedded with a charging indicator light electrically connected with the main control unit.
According to the scheme, the main control unit is connected with a dial switch for adjusting the temperature measuring range; different keys on the dial switch correspond to different temperature measuring ranges, the temperature measuring device is suitable for different high-temperature molten metals, and thermocouples with different thermode materials are replaced for measuring the temperature according to different molten metals.
The utility model discloses following beneficial effect has: the utility model uses the liquid crystal screen to replace the single display mode of the prior nixie tube, displays the temperature of the molten metal measured according to the thermocouple signal, and the main control unit also displays the temperature measuring range, the environmental temperature and the electric quantity parameter comprehensively; the LCD screen is better for charactron stability, and is not fragile, small and exquisite light, demonstration clarity, and the low power dissipation, the strong characteristics of stability.
Drawings
FIG. 1 is a block diagram of the overall structure of an embodiment of the present invention;
fig. 2 is a schematic structural view of an appearance of an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of the main control unit in this embodiment;
FIG. 4 is a schematic circuit diagram of an analog-to-digital conversion circuit in the thermocouple signal conditioning unit according to the present embodiment;
FIG. 5 is a schematic circuit diagram of a thermocouple cold-end reference circuit in the thermocouple signal conditioning unit according to this embodiment;
FIG. 6 is a schematic circuit diagram of a signal voltage matching unit in the present embodiment;
FIG. 7 is a schematic circuit diagram of a display driving unit according to the present embodiment;
fig. 8 is a schematic circuit diagram of the lcd backlight driving unit according to the present embodiment.
Reference numerals: 1. a housing; 2. a liquid crystal screen; 3. a power supply key; 4. and a charging indicator light.
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 8, the present invention relates to a handheld melting thermometer, which comprises a casing 1, a main control panel, a display panel, a liquid crystal display 2, a buzzer and a power supply; the main control panel, the display panel and the power supply are all arranged in the shell 1, the liquid crystal screen 2 and the buzzer are all embedded on the shell 1, and the power supply is used for supplying power to the main control panel, the display panel, the liquid crystal screen 2 and the buzzer; the bottom of the shell 2 is provided with a handle.
The main control board comprises a main control unit and a thermocouple signal conditioning unit; the signal input end of the thermocouple signal conditioning unit is used for receiving thermocouple signals, the signal output end of the thermocouple signal conditioning unit is connected to the input end of the main control unit, and the output end of the main control unit is connected to the display panel and the buzzer;
in this embodiment, referring to fig. 3, the main control unit uses an STC15W1K-SOP28 single chip microcomputer, the main control unit is connected with a DIP switch DIP8 for adjusting a temperature measurement range, different keys on the DIP switch correspond to different temperature measurement ranges, the temperature measurement device is suitable for different high-temperature molten metals, and thermocouples with different thermode materials are replaced for different molten metals to measure temperature. The buzzer is connected to the main control unit and used for prompting an operator to successfully measure the temperature, and the buzzing time is 1-2 seconds. The main control unit displays the temperature of the molten metal measured according to the thermocouple signal, the temperature measuring range of the molten metal, the ambient temperature and the power supply electric quantity on the liquid crystal screen 2.
Referring to fig. 4 and 5, the thermocouple signal conditioning unit includes an analog-to-digital conversion circuit and a thermocouple cold end reference circuit, wherein an input end JI interface of the analog-to-digital conversion circuit is used for externally connecting a thermocouple to obtain a thermocouple signal, and the thermocouple signal is input into the analog-to-digital converter after being filtered and amplified, and then is output to the main control unit after being analog-to-digital converted; the thermocouple cold end reference circuit comprises a temperature sensor which is used for detecting the ambient temperature to generate thermocouple cold end reference voltage and outputting the thermocouple cold end reference voltage to the main control unit, and the ambient temperature measured by the temperature sensor is displayed on the liquid crystal screen 2; in this embodiment, the analog-to-digital converter adopts an ICL7135 analog-to-digital conversion chip, and has the characteristics of high precision, low price and high conversion speed, and the temperature sensor adoptsDS18B20。
The display panel comprises a signal voltage matching unit, a display driving unit and a liquid crystal screen backlight driving unit; the signal voltage matching unit is connected to the main control unit and used for transmitting signals, the signal voltage matching unit is connected to the display driving unit, the output end of the display driving unit is connected to the liquid crystal screen 2, the input end of the liquid crystal screen backlight driving unit is connected to the display driving unit, and the output end of the liquid crystal screen backlight driving unit is connected to the liquid crystal screen 2.
Referring to fig. 6, the signal voltage matching unit performs high-low level conversion, i.e., signal switching of transmitting and receiving data, by using an NMOS transistor of the SOT 23. Referring to fig. 7, the display driving unit adopts an STC15W401AS single chip microcomputer, so that the power consumption is low, and the anti-interference performance is good. In the embodiment, the liquid crystal display 2 adopts an LX12864T liquid crystal display screen produced by force electronics limited company, and has the advantages of small size, portability, convenient use, clear display, low power consumption and strong stability; the display panel further comprises a liquid crystal panel backlight driving unit as shown in fig. 8 to more clearly show the data on the liquid crystal panel 2.
In this embodiment, the power supply is a rechargeable lithium battery, the rechargeable lithium battery is provided with a charging interface, and the charging interface is arranged at the bottom of the shell 1; for realizing rechargeable lithium battery charging, still include the power supply circuit who has been used for realizing lithium battery charge-discharge on the main control board, the staff of being convenient for on LCD screen 2 of lithium battery electric quantity display looks over real-time electric quantity, charges to the thermoscope in good time. The power button 3 that is used for controlling the power to open or close is inlayed on the casing 1, and the casing 1 still inlays and is equipped with the charge indicator 4 that the electricity is connected in the main control unit, and in this embodiment, the charge indicator 4 is current double-colored charge indicator 4, is red in charging, and it is green to be full of the electricity. In this embodiment, the output voltage of the rechargeable lithium battery is 5V, the required working voltage of the display panel is 3.3V, the display panel further includes a display voltage conversion circuit for converting the +5V power supply voltage to provide a 3.3V working voltage to the signal voltage matching unit, the display driving unit and the liquid crystal display backlight driving unit, and the AMS1117 voltage conversion chip is specifically adopted.
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 handheld smelting thermodetector is characterized in that: the device comprises a shell, a main control panel, a display panel, a liquid crystal display, a buzzer and a power supply; the main control board, the display board and the power supply are all arranged in the shell, the liquid crystal screen and the buzzer are all embedded on the shell, and the power supply is used for supplying power to the main control board, the display board, the liquid crystal screen and the buzzer;
the main control board comprises a main control unit and a thermocouple signal conditioning unit; the signal input end of the thermocouple signal conditioning unit is used for receiving thermocouple signals, the signal output end of the thermocouple signal conditioning unit is connected to the input end of the main control unit, and the output end of the main control unit is connected to the display panel and the buzzer;
the display panel includes a signal voltage matching unit and a display driving unit; the signal voltage matching unit is connected to the main control unit and used for transmitting signals, the signal voltage matching unit is connected to the display driving unit, and the output end of the display driving unit is connected to the liquid crystal screen.
2. The handheld melting thermometer of claim 1, wherein: the liquid crystal display screen adopts an LX128 12864T liquid crystal display screen manufactured by force first electronics limited company.
3. The handheld melting thermometer of claim 1, wherein: the display panel further comprises a liquid crystal display backlight driving unit, wherein the input end of the liquid crystal display backlight driving unit is connected to the display driving unit, and the output end of the liquid crystal display backlight driving unit is connected to the liquid crystal display.
4. The handheld melting thermometer of claim 3, wherein: the display panel also comprises a display voltage conversion circuit which is used for converting the power supply voltage to provide working voltage for the signal voltage matching unit, the display driving unit and the liquid crystal screen backlight driving unit.
5. The handheld melting thermometer of claim 1, wherein: the thermocouple signal conditioning unit comprises an analog-to-digital conversion circuit and a thermocouple cold end reference circuit, the analog-to-digital conversion circuit is used for being externally connected with a thermocouple and outputting thermocouple signals to the main control unit after being subjected to analog-to-digital conversion, and the thermocouple cold end reference circuit comprises a temperature sensor which is used for detecting environmental temperature to generate thermocouple cold end reference voltage and outputting the thermocouple cold end reference voltage to the main control unit.
6. The handheld melting thermometer of claim 1, wherein: the main control unit adopts an STC15W1K-SOP28 singlechip.
7. The handheld melting thermometer of claim 1, wherein: the power is rechargeable lithium battery, and rechargeable lithium battery is equipped with the interface that charges, and the interface that charges is located on the casing.
8. The handheld melting thermometer of claim 7, wherein: the shell is also embedded with a charging indicator light electrically connected with the main control unit.
9. The handheld melting thermometer of claim 1, wherein: the main control unit is connected with a dial switch for adjusting the temperature measuring range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020602401.5U CN211904446U (en) | 2020-04-21 | 2020-04-21 | Handheld smelting temperature measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020602401.5U CN211904446U (en) | 2020-04-21 | 2020-04-21 | Handheld smelting temperature measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211904446U true CN211904446U (en) | 2020-11-10 |
Family
ID=73277860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020602401.5U Expired - Fee Related CN211904446U (en) | 2020-04-21 | 2020-04-21 | Handheld smelting temperature measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211904446U (en) |
-
2020
- 2020-04-21 CN CN202020602401.5U patent/CN211904446U/en not_active Expired - Fee Related
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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: 20201110 |
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| CF01 | Termination of patent right due to non-payment of annual fee |