技术领域technical field
本发明涉及一种温度显示仪表，特别是一种热电阻温度巡检仪。The invention relates to a temperature display instrument, in particular to a thermal resistance temperature inspection instrument.
背景技术Background technique
热电阻测温应用非常普遍，但由于热电阻的品种多，且显示温度的仪表需要与热电阻的型号相对应，这就造成了显示仪表只能显示与之对应的热电阻测得的温度，且只能显示一路温度信号。Thermal resistance temperature measurement is very common, but because there are many types of thermal resistance, and the instrument that displays the temperature needs to correspond to the type of thermal resistance, this causes the display instrument to only display the temperature measured by the corresponding thermal resistance. And only one temperature signal can be displayed.
发明内容Contents of the invention
本发明要解决的技术问题在于提供一种能显示多路且不同热电阻温度信号的温度显示仪表。The technical problem to be solved by the present invention is to provide a temperature display instrument capable of displaying multiple and different thermal resistance temperature signals.
为达到上述目的，本发明通过以下的技术方案来实现：To achieve the above object, the present invention is achieved through the following technical solutions:
一种热电阻温度巡检仪，其特征在于，包括热电阻、热电阻温度变送器、多路模拟开关、A/D转换器、单片机系统、LCD显示、按键、串口输出和报警器，所述的热电阻、热电阻温度变送器、多路模拟开关、A/D转换器和单片机系统依次串联连接，所述的LCD显示、按键、串口输出、报警器和多路模拟开关分别与单片机系统连接。A thermal resistance temperature inspection instrument is characterized in that it comprises a thermal resistance, a thermal resistance temperature transmitter, a multi-channel analog switch, an A/D converter, a single-chip microcomputer system, an LCD display, buttons, a serial port output and an alarm. The thermal resistance, thermal resistance temperature transmitter, multi-channel analog switch, A/D converter and single-chip microcomputer system are sequentially connected in series, and the described LCD display, buttons, serial port output, alarm and multi-channel analog switch are connected with the single-chip microcomputer respectively. system connection.
进一步，所述的热电阻，包括1-8只热电阻，热电阻包括Pt100和Cu50。Further, the thermal resistors include 1-8 thermal resistors, and the thermal resistors include Pt100 and Cu50.
进一步，所述的热电阻温度变送器，包括与所述热电阻对应的1-8台热电阻温度变送器。Further, the thermal resistance temperature transmitter includes 1-8 thermal resistance temperature transmitters corresponding to the thermal resistances.
进一步，所述的多路模拟开关的型号为CD4051。Further, the model of the multi-channel analog switch is CD4051.
进一步，所述的A/D转换器的型号为PCF8591。Further, the model of the A/D converter is PCF8591.
进一步，所述的LCD显示的型号为LCD1602。Further, the model of the LCD display is LCD1602.
本发明的有益效果是，提供了一种能显示多路且不同热电阻温度信号的温度显示仪表。The invention has the beneficial effects of providing a temperature display instrument capable of displaying multiple and different thermal resistance temperature signals.
附图说明Description of drawings
图1是本发明的结构示意图。Fig. 1 is a structural schematic diagram of the present invention.
附图中标记含义如下：The meanings of the marks in the drawings are as follows:
1、热电阻 2、热电阻温度变送器 3、多路模拟开关 4、A/D转换器 5、单片机系统 6、LCD显示 7、按键 8、串口输出 9、报警器。1. Thermal resistance 2. Thermal resistance temperature transmitter 3. Multi-channel analog switch 4. A/D converter 5. Single-chip microcomputer system 6. LCD display 7. Button 8. Serial port output 9. Alarm.
具体实施方式Detailed ways
下面结合示图及具体实施例对本发明作进一步的详细说明。The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
参照图1，本发明一种热电阻温度巡检仪，包括热电阻1、热电阻温度变送器2、多路模拟开关3、A/D转换器4、单片机系统5、LCD显示6、按键7、串口输出8和报警器9，所述的热电阻1、热电阻温度变送器2、多路模拟开关3、A/D转换器4和单片机系统5依次串联连接，所述的LCD显示6、按键7、串口输出8、报警器9和多路模拟开关3分别与单片机系统5连接。Referring to Fig. 1, a thermal resistance temperature inspection instrument of the present invention includes a thermal resistance 1, a thermal resistance temperature transmitter 2, a multi-channel analog switch 3, an A/D converter 4, a single-chip microcomputer system 5, an LCD display 6, and buttons 7. Serial port output 8 and alarm 9, described thermal resistance 1, thermal resistance temperature transmitter 2, multi-channel analog switch 3, A/D converter 4 and single-chip microcomputer system 5 are sequentially connected in series, and described LCD display 6. Button 7, serial port output 8, alarm 9 and multi-channel analog switch 3 are respectively connected with single-chip microcomputer system 5.
进一步，所述的热电阻1，包括1-8只热电阻，热电阻包括Pt100和Cu50。Further, the thermal resistor 1 includes 1-8 thermal resistors, and the thermal resistors include Pt100 and Cu50.
进一步，所述的热电阻温度变送器2，包括与所述热电阻1对应的1-8台热电阻温度变送器。Further, the thermal resistance temperature transmitter 2 includes 1-8 thermal resistance temperature transmitters corresponding to the thermal resistance 1 .
进一步，所述的多路模拟开关3的型号为CD4051。Further, the model of the multi-channel analog switch 3 is CD4051.
进一步，所述的A/D转换器4的型号为PCF8591。Further, the model of the A/D converter 4 is PCF8591.
进一步，所述的LCD显示6的型号为LCD1602。Further, the model of the LCD display 6 is LCD1602.
本发明的工作原理：热电阻1将所测的温度信号转换为电阻变化后经热电阻温度变送器2 采样变换后中输出标准的4-20mA直流电流，经多路模拟开关3选通，再由A/D转换器4转换为数字信号送到单片机系统5，单片机系统5驱动LCD显示6指示相应通路的温度值，按键7用于操作设置，如设置各通道热电阻的类型、温度显示范围和报警上下限等，当温度越限时，报警器9发出报警信号，模拟开关3由单片机系统5控制对热电阻温度变送器2的测量信号选通，串口输出8用于和计算机的通信。The working principle of the present invention: the thermal resistance 1 converts the measured temperature signal into a resistance change, and then outputs a standard 4-20mA DC current after sampling and transformation by the thermal resistance temperature transmitter 2, and selects through the multi-channel analog switch 3. Then the A/D converter 4 converts it into a digital signal and sends it to the single-chip system 5. The single-chip system 5 drives the LCD display 6 to indicate the temperature value of the corresponding channel. Range and alarm upper and lower limits, etc., when the temperature exceeds the limit, the alarm 9 sends an alarm signal, the analog switch 3 is controlled by the single-chip microcomputer system 5 to strobe the measurement signal of the thermal resistance temperature transmitter 2, and the serial port output 8 is used for communication with the computer .
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410746381.8ACN104359580A (en) | 2014-12-09 | 2014-12-09 | Thermal resistance temperature itinerant detector |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410746381.8ACN104359580A (en) | 2014-12-09 | 2014-12-09 | Thermal resistance temperature itinerant detector |
| Publication Number | Publication Date |
|---|---|
| CN104359580Atrue CN104359580A (en) | 2015-02-18 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410746381.8APendingCN104359580A (en) | 2014-12-09 | 2014-12-09 | Thermal resistance temperature itinerant detector |
| Country | Link |
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| CN (1) | CN104359580A (en) |
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| CN204269250U (en)* | 2014-12-09 | 2015-04-15 | 南京化工职业技术学院 | A kind of resistance and temperature logging |
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| CN201314846Y (en)* | 2008-12-25 | 2009-09-23 | 李峰 | Temperature inspecting instrument |
| CN201837478U (en)* | 2010-10-26 | 2011-05-18 | 重庆迪洋仪表有限责任公司 | Explosion proof type multi-point temperature measurement system |
| CN202533186U (en)* | 2012-05-03 | 2012-11-14 | 重庆升旭科技有限公司 | Temperature inspecting instrument |
| CN202814589U (en)* | 2012-10-22 | 2013-03-20 | 哈尔滨师范大学 | Temperature inspecting instrument |
| WO2014113959A1 (en)* | 2013-01-24 | 2014-07-31 | Intel Corporation | Integrated hardware and software for probe |
| CN204269250U (en)* | 2014-12-09 | 2015-04-15 | 南京化工职业技术学院 | A kind of resistance and temperature logging |
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| CN105841835A (en)* | 2015-12-31 | 2016-08-10 | 西安航天精密机电研究所 | Temperature tour inspection circuit |
| CN107063505A (en)* | 2017-02-13 | 2017-08-18 | 东北电力大学 | A kind of Portable thermal resistive energy detector |
| CN107478349A (en)* | 2017-08-11 | 2017-12-15 | 河南天通电力有限公司 | Temperature polling instrument |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication | Application publication date:20150218 | |
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