CN216246467U - Handheld Sensor Diagnostic Tester - Google Patents
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 38
- 238000004891 communication Methods 0.000 claims abstract description 32
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 21
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Abstract
Description
技术领域technical field
本实用新型涉及到测试仪领域，特别是涉及手持式传感器诊断测试仪。The utility model relates to the field of testers, in particular to a hand-held sensor diagnostic tester.
背景技术Background technique
在农田、温室大棚、植保等设备的在线式传感器应用领域中。常因雷击、火烧、土地耕作、自然老化等原因造成通信线路中断或传感器失效。一般采用替换疑似故障使备或在现场通过笔记本电脑、485转换线、万用表等工具进行现场测试、调试、故障排除等工作。又常因地处偏僻环境简陋，笔记本电脑续航能力不足等因素限制，造成现场维护工作困难，存在集成度低，通电不便利，使用不便捷等问题。In the field of online sensor application of farmland, greenhouse, plant protection and other equipment. Communication lines are often interrupted or sensors fail due to lightning strikes, fires, land cultivation, and natural aging. It is generally used to replace the suspected faulty equipment, or to carry out on-site testing, debugging, troubleshooting and other work through laptop computers, 485 conversion lines, multimeters and other tools. It is often limited by factors such as the remote environment and the insufficient battery life of the notebook computer, resulting in difficult on-site maintenance work, low integration, inconvenient power supply, and inconvenient use.
实用新型内容Utility model content
为了克服上述现有技术存在的缺陷，本实用新型提供了手持式传感器诊断测试仪，可以用于现场的传感器诊断测试工作。相对于传统的检测仪，兼顾日常维护、测试所需的软硬件集于一身，配备充电锂电池，一机多用，启动快，运行稳定。In order to overcome the above-mentioned defects in the prior art, the present invention provides a hand-held sensor diagnostic tester, which can be used for on-site sensor diagnostic test work. Compared with the traditional detector, it integrates the software and hardware required for daily maintenance and testing, and is equipped with a rechargeable lithium battery.
本实用新型采用的技术方案在于：The technical scheme adopted by the utility model is:
手持式传感器诊断测试仪，包括主控芯片，液晶显示屏用背光控制电路，单色液晶显示屏，物理按键，锂电池，锂电池充电电路，电源输出升压电路，输出选择开关，传感器接口，RS485通信电路，电压监测电路；锂电池与锂电池充电电路连接，所述锂电池充电电路通过电源输出升压电路与输出选择开关连接，所述锂电池充电电路同时单独与输出选择开关连接，所述锂电池充电电路同时与主控芯片连接，所述输出选择开关与传感器接口连接，所述传感器接口通过电压监测电路与所述主控芯片连接，所述传感器接口通过RS485通信电路与所述主控芯片连接，所述主控芯片与所述物理按键连接，所述主控芯片分别与单色液晶显示屏以及液晶显示屏用背光控制电路连接；Handheld sensor diagnostic tester, including main control chip, LCD backlight control circuit, monochrome LCD, physical buttons, lithium battery, lithium battery charging circuit, power output boost circuit, output selection switch, sensor interface, RS485 communication circuit, voltage monitoring circuit; the lithium battery is connected to the lithium battery charging circuit, the lithium battery charging circuit is connected to the output selection switch through the power output booster circuit, and the lithium battery charging circuit is separately connected to the output selection switch at the same time. The lithium battery charging circuit is connected to the main control chip at the same time, the output selection switch is connected to the sensor interface, the sensor interface is connected to the main control chip through a voltage monitoring circuit, and the sensor interface is connected to the main control chip through an RS485 communication circuit. a control chip is connected, the main control chip is connected with the physical button, and the main control chip is respectively connected with a monochrome liquid crystal display screen and a backlight control circuit for the liquid crystal display screen;
所述主控芯片，用于接收传感器数据，并通过内部程序对数据进行处理；The main control chip is used to receive sensor data and process the data through an internal program;
所述液晶显示屏用背光控制电路，用于执行单色液晶显示屏的背光显示功能；The backlight control circuit for the liquid crystal display screen is used for performing the backlight display function of the monochrome liquid crystal display screen;
所述单色液晶显示屏，用于显示传感器数据、人机操作界面等信息；The monochrome liquid crystal display screen is used to display sensor data, man-machine operation interface and other information;
所述物理按键与主控芯片连接，用于设置使用测试仪所需的信息；The physical button is connected with the main control chip, and is used to set the information required for using the tester;
所述锂电池充电电路，用于锂电池保护、充电管理、电压输出；The lithium battery charging circuit is used for lithium battery protection, charging management, and voltage output;
所述锂电池，用于通过充电获取电能，以及给手持式传感器诊断测试仪供电；The lithium battery is used to obtain electric energy through charging and to supply power to the hand-held sensor diagnostic tester;
所述电源输出升压电路，用于提升电压，并通过传感器接口为被测传感器提供电源，The power output boost circuit is used to boost the voltage and provide power for the sensor under test through the sensor interface,
所述RS485通信电路，用于数据通信；The RS485 communication circuit is used for data communication;
所述电压监测电路，用于监测通信电缆电压；The voltage monitoring circuit is used to monitor the communication cable voltage;
所述输出选择开关，用于选择合适于被测传感器的输出电压，将电压送给传感器接口。The output selection switch is used to select the output voltage suitable for the sensor under test, and send the voltage to the sensor interface.
进一步的，所述电源输出升压电路，用于将5V电压升压到12V电压。Further, the power supply outputs a boost circuit for boosting the 5V voltage to the 12V voltage.
进一步的，所述电源输出升压电路，用于两种电源输出模式，即主动模式与测量模式，主动模式用于输出电压，给被测传感器供电；测量模式不输出电压，监测被测通信线路中的供电电压，用来判断线路中的电压是否正常。Further, the power output boost circuit is used for two power output modes, namely active mode and measurement mode. The active mode is used to output voltage and supply power to the sensor under test; the measurement mode does not output voltage and monitors the communication line under test. The power supply voltage in the line is used to judge whether the voltage in the line is normal.
进一步的，所述输出选择开关，为三段式的输出选择开关，用于选择合适于被测传感器的输出电压，将5V或12V电压送给传感器接口。Further, the output selection switch is a three-stage output selection switch, which is used to select the output voltage suitable for the sensor under test, and send the 5V or 12V voltage to the sensor interface.
进一步的，所述传感器接口，适配不同的连接线，用于连接不同物理接口的传感器或被测设备。Further, the sensor interface is adapted to different connecting lines for connecting sensors or devices under test with different physical interfaces.
本实用新型的有益效果是：The beneficial effects of the present utility model are:
1.本实用新型具有用途专业，采用软硬件结合的设计方式，集成度更高，内置可充电锂电池。1. The utility model has a professional use, adopts a design method of combining software and hardware, has a higher integration degree, and has a built-in rechargeable lithium battery.
2.本实用新型通过搭配不同的连接线以连接不同物理接口的传感器或被测设备，即可以为被测传感器提供电源，直接读取传感器数值，也可以用来测量通信电缆上的供电情况，实现一机多用。2. The utility model can provide power for the sensor under test, directly read the sensor value, and can also be used to measure the power supply on the communication cable by matching different connecting lines to connect sensors or devices under test with different physical interfaces. Realize a multi-purpose machine.
附图说明Description of drawings
图1是手持式传感器诊断测试仪原理框图；Figure 1 is a schematic block diagram of a handheld sensor diagnostic tester;
图2是手持式传感器诊断测试仪主控电路图；Fig. 2 is the main control circuit diagram of the hand-held sensor diagnostic tester;
图3是手持式传感器诊断测试仪3.3V稳压电路图；Figure 3 is the 3.3V voltage regulator circuit diagram of the hand-held sensor diagnostic tester;
图4是手持式传感器诊断测试仪AD基准电压电路图；Fig. 4 is the AD reference voltage circuit diagram of the hand-held sensor diagnostic tester;
图5是手持式传感器诊断测试仪EEPROM电路图；Fig. 5 is the EEPROM circuit diagram of the hand-held sensor diagnostic tester;
图6是手持式传感器诊断测试仪液晶显示屏接线图及液晶显示屏用背光控制电路；图7是手持式传感器诊断测试仪物理按键电路图；Fig. 6 is the wiring diagram of the liquid crystal display screen of the hand-held sensor diagnostic tester and the backlight control circuit for the liquid crystal display; Fig. 7 is the circuit diagram of the physical button of the hand-held sensor diagnostic tester;
图8是手持式传感器诊断测试仪锂电池充电电路图；Fig. 8 is the charging circuit diagram of the lithium battery of the handheld sensor diagnostic tester;
图9是手持式传感器诊断测试仪电源输出升压电路图；Fig. 9 is the circuit diagram of the power supply output booster of the hand-held sensor diagnostic tester;
图10是手持式传感器诊断测试仪RS485通信电路及传感器接口电路图；Fig. 10 is the RS485 communication circuit and the sensor interface circuit diagram of the handheld sensor diagnostic tester;
图11是手持式传感器诊断测试仪电压监测电路图；Fig. 11 is the voltage monitoring circuit diagram of the hand-held sensor diagnostic tester;
图12是手持式传感器诊断测试仪输出选择开关原理图；Figure 12 is a schematic diagram of the output selection switch of the hand-held sensor diagnostic tester;
具体实施方式Detailed ways
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments.
如图1、图2、图3、图4、图5所示，手持式传感器诊断测试仪，包括主控芯片，液晶显示屏用背光控制电路，单色液晶显示屏，物理按键，锂电池，锂电池充电电路，电源输出升压电路，输出选择开关，传感器接口，RS485通信电路，电压监测电路；锂电池与锂电池充电电路连接，所述锂电池充电电路通过电源输出升压电路与输出选择开关连接，所述锂电池充电电路同时单独与输出选择开关连接，所述锂电池充电电路同时与主控芯片连接，所述输出选择开关与传感器接口连接，所述传感器接口通过电压监测电路与所述主控芯片连接，所述传感器接口同时通过RS485通信电路与所述主控芯片连接，所述主控芯片与所述物理按键连接，所述主控芯片分别与单色液晶显示屏以及液晶显示屏用背光控制电路连接。As shown in Figure 1, Figure 2, Figure 3, Figure 4, and Figure 5, the handheld sensor diagnostic tester includes a main control chip, a backlight control circuit for the LCD screen, a monochrome LCD screen, physical buttons, and a lithium battery. Lithium battery charging circuit, power output booster circuit, output selection switch, sensor interface, RS485 communication circuit, voltage monitoring circuit; Lithium battery is connected to the lithium battery charging circuit, and the lithium battery charging circuit is connected to the output selection through the power output booster circuit The switch is connected, the lithium battery charging circuit is separately connected to the output selection switch at the same time, the lithium battery charging circuit is connected to the main control chip at the same time, the output selection switch is connected to the sensor interface, and the sensor interface is connected to the sensor interface through the voltage monitoring circuit. The main control chip is connected to the main control chip, the sensor interface is simultaneously connected to the main control chip through the RS485 communication circuit, the main control chip is connected to the physical keys, and the main control chip is respectively connected to the monochrome liquid crystal display screen and the liquid crystal display screen. The screen is connected with the backlight control circuit.
所述主控芯片，采用STM32单片机，作为手持终端的核心器件，通过RS485通信电路与传感器接口相连，接收传感器数据，并通过内部程序对数据进行处理。The main control chip adopts STM32 single-chip microcomputer as the core device of the handheld terminal, and is connected with the sensor interface through the RS485 communication circuit, receives the sensor data, and processes the data through the internal program.
如图6所示，所述液晶显示屏用背光控制电路，用于执行单色液晶显示屏的背光显示功能。所述单色液晶显示屏，用于显示传感器数据、人机操作界面等信息。As shown in FIG. 6 , the backlight control circuit for the liquid crystal display screen is used to perform the backlight display function of the monochrome liquid crystal display screen. The monochrome liquid crystal display screen is used to display sensor data, man-machine operation interface and other information.
如图7所示，所述物理按键与主控芯片连接，用于设置使用测试仪所需的信息。As shown in FIG. 7 , the physical buttons are connected to the main control chip, and are used to set the information required for using the tester.
如图8所示，所述锂电池充电电路，为手持终端的主电源，将锂电池输出的电压转换成稳定的5V电压为所有电路元件供电，锂电池充电电路具有锂电池保护、充电管理、5V电压输出几项功能。所述锂电池，与锂电池充电电路配合，可以充电，用于给设备供电。As shown in Figure 8, the lithium battery charging circuit is the main power supply of the handheld terminal, and converts the output voltage of the lithium battery into a stable 5V voltage to supply power for all circuit components. The lithium battery charging circuit has lithium battery protection, charging management, 5V voltage output several functions. The lithium battery, in cooperation with the lithium battery charging circuit, can be charged for supplying power to the device.
如图9所示，所述电源输出升压电路，将内部的5V电压升压到12V，通过三段式的输出选择开关将5V或12V电压送给传感器接口。为被测传感器提供5V或12V电源。手持终端拥有两种电源输出模式，即主动模式与测量模式，通过三段式的开关进行选择。主动模式下分别有5V和12V两种输出电压选择，以兼容不同供电电压的被测传感器。测量模式下手持终端不向外输出电压，但是监测被测通信线路中的供电电压，用来判断线路中的电压是否正常。As shown in Figure 9, the power supply output boost circuit boosts the internal 5V voltage to 12V, and sends the 5V or 12V voltage to the sensor interface through the three-stage output selection switch. Provide 5V or 12V power supply to the sensor under test. The handheld terminal has two power output modes, active mode and measurement mode, which can be selected through a three-stage switch. In active mode, there are two output voltage options, 5V and 12V, to be compatible with sensors under test with different supply voltages. In the measurement mode, the handheld terminal does not output voltage, but monitors the power supply voltage in the communication line under test to determine whether the voltage in the line is normal.
如图10所示，所述RS485通信电路，用于通过modbus通信协议，连接被测传感器进行数据通信。所述传感器接口，用于通过波特率、地址码、读取指令、寄存器地址等信息，选择合适的连接线将被测传感器与测试仪的传感器接口相连，搭配不同的连接线以连接不同物理接口的传感器或被测设备。As shown in Figure 10, the RS485 communication circuit is used to connect the sensor under test for data communication through the modbus communication protocol. The sensor interface is used to select a suitable connection line to connect the sensor under test with the sensor interface of the tester through information such as baud rate, address code, read command, register address, etc., and use different connection lines to connect different physical devices. Interface to the sensor or device under test.
如图11所示，所述电压监测电路，用于监测通信电缆电压，并将信号反馈给主控芯片。As shown in FIG. 11 , the voltage monitoring circuit is used to monitor the voltage of the communication cable and feed back the signal to the main control chip.
如图12所示，所述输出选择开关，为三段式的输出选择开关，用于选择合适于被测传感器的输出电压，将5V或12V电压送给传感器接口。As shown in FIG. 12 , the output selection switch is a three-stage output selection switch, which is used to select the output voltage suitable for the sensor under test, and send the 5V or 12V voltage to the sensor interface.
测试方法如下：The test method is as follows:
测试前技术人员应对被测传感器及电路有充分的了解，要知道被测传感器的供电电压、传感器的信号输出类型、波特率、设备地址码等技术参数。Before the test, the technician should have a full understanding of the sensor and circuit under test, and should know the technical parameters such as the power supply voltage of the sensor under test, the signal output type of the sensor, the baud rate, and the device address code.
1、测试传感器1. Test the sensor
首先通过输出选择开关选择合适于被测传感器的输出电压。通过按键设置好波特率、地址码、读取指令、寄存器地址等信息。信息通过物理按键电路输入给主控制芯片，然后选择合适的连接线将被测传感器与测试仪的传感器接口相连，如果需要升压则锂电池通过电源输出升压电路升压然后通过输出选择开关给传感器接口传送电压，通过传感器接口给被测传感器供电。被测传感器通过传感器接口与RS485通信电路通信，信号通过RS485通信电路传递给主控制芯片，主控制芯片处理后，将信息传递给单色液晶显示屏，通过液晶显示屏用背光控制电路控制屏幕亮度，此时如果被测传感器正常可以通过液晶屏查看读取到的数值，可以通过数值进一步的分析传感器读数是否正确。如果没有读取到相应的数值或输出电压被拉低，则可能传感器内部短路或传感器损坏。First select the output voltage suitable for the sensor under test through the output selection switch. Set the baud rate, address code, read command, register address and other information by pressing the button. The information is input to the main control chip through the physical button circuit, and then select the appropriate connecting line to connect the sensor under test with the sensor interface of the tester. The sensor interface transmits voltage, and supplies power to the sensor under test through the sensor interface. The sensor under test communicates with the RS485 communication circuit through the sensor interface, and the signal is transmitted to the main control chip through the RS485 communication circuit. After processing by the main control chip, the information is transmitted to the monochrome liquid crystal display screen, and the screen brightness is controlled by the backlight control circuit of the liquid crystal display screen. , at this time, if the measured sensor is normal, you can check the read value through the LCD screen, and you can further analyze whether the sensor reading is correct through the value. If the corresponding value is not read or the output voltage is pulled low, the sensor may be shorted or damaged.
2、测试通信电缆2. Test the communication cable
将输出选择开关拨到测量模式，将通信电缆与测试仪的传感器接口相连，此时测试仪并不会向外输出供电电压，但是会检测通信电缆中的供电电压。被测电压信号通过电压监测电路传递给主控制芯片，主控制芯片处理后，将信息传递给单色液晶显示屏，通过液晶显示屏用背光控制电路控制屏幕亮度，通过屏幕显示的信息，如果电压异常或无电则需要进一步检查通信电缆和上级供电设备。Turn the output selection switch to measurement mode, and connect the communication cable to the sensor interface of the tester. At this time, the tester will not output the power supply voltage, but will detect the power supply voltage in the communication cable. The measured voltage signal is transmitted to the main control chip through the voltage monitoring circuit. After the main control chip is processed, the information is transmitted to the monochrome LCD screen, and the screen brightness is controlled by the backlight control circuit through the LCD screen. Abnormal or no power requires further inspection of communication cables and upper-level power supply equipment.
3、未知传感器的测试3. Unknown sensor test
不建议测试未知供电电压的传感器或通信电缆，过高供电电压可能对测试仪或传感器造成损坏。对于已知传感器的供电电压、输出类型，但工作的波特率、地址码等信息不详的传感器，可以通过自动搜索或更改手动设置来测试。Testing sensors or communication cables with unknown supply voltages is not recommended, as excessive supply voltages may damage the tester or sensors. For sensors whose power supply voltage and output type are known, but the working baud rate, address code and other information are unknown, they can be tested by automatic search or by changing manual settings.
Claims (5)
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| CN202122914771.XU CN216246467U (en) | 2021-11-25 | 2021-11-25 | Handheld Sensor Diagnostic Tester |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115474105A (en) * | 2022-08-23 | 2022-12-13 | 广州赛通科技有限公司 | Debugging equipment for a handheld sensor |
| CN117742210A (en) * | 2023-12-20 | 2024-03-22 | 四川航天电液控制有限公司 | Mining flameproof and intrinsically safe data acquisition substation capable of locally setting parameters |
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2021
- 2021-11-25 CN CN202122914771.XU patent/CN216246467U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115474105A (en) * | 2022-08-23 | 2022-12-13 | 广州赛通科技有限公司 | Debugging equipment for a handheld sensor |
| CN117742210A (en) * | 2023-12-20 | 2024-03-22 | 四川航天电液控制有限公司 | Mining flameproof and intrinsically safe data acquisition substation capable of locally setting parameters |
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