CN211478130U

CN211478130U - Novel portable handheld dew point meter

Info

Publication number: CN211478130U
Application number: CN201922282901.5U
Authority: CN
Inventors: 邓良益; 蒋书波; 刘亮君; 鄂萌勃; 李敏; 李家宇
Original assignee: Sichuan Tyrande Technology Co ltd
Current assignee: Sichuan Tyrande Technology Co ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-09-11
Anticipated expiration: 2029-12-18

Abstract

The utility model discloses a novel portable handheld dew point instrument, which comprises a dew point sensor and a singlechip connected with the dew point sensor, wherein the singlechip and the dew point sensor are detachably connected; the dew point sensor adopts a POM172 dew point sensor; the singlechip adopts the STM32 singlechip, and STM32 singlechip is connected with and is used for can dismantling the POM172 interface of being connected with POM172 dew point sensor, the storage module that is used for the storage data, is used for showing digital display module, is used for being connected the USB module of transmission data and the power module that is used for supplying power with the host computer, power module adopts the lithium cell power supply. The utility model adopts the combination of the POM172 dew point sensor and the STM32 single chip microcomputer, relates to a hand-held low-power-consumption dew point detector, is convenient for moving and detecting dew points, and directly realizes the acquisition result through a display screen, thereby being convenient for visually obtaining dew point data; the device has the advantages of small volume, high detection efficiency, low cost and the like.

Description

Novel portable handheld dew point meter

Technical Field

The utility model belongs to the dew point detection field, concretely relates to novel portable handheld dew point meter.

Background

The dew point is the temperature at which the air is cooled to saturation while maintaining a constant air pressure with the water vapor content in the air. The dew point detection of various gases is required in petrochemical industry, natural gas, metallurgy, drying equipment, electronic power, mechanical manufacturing and other industries. At present, a dew point instrument is a precision dew point instrument for common dew point detection equipment, the dew point instrument has high dew point detection precision, and is movable, but the dew point instrument has large volume and is inconvenient to move; it also needs to be placed on a certain level to be detected and cannot be held by hand.

Disclosure of Invention

An object of the utility model is to provide a small and remove convenient a novel portable handheld dew point hygrometer.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a novel portable handheld dew point instrument comprises a dew point sensor and a single chip microcomputer connected with the dew point sensor, wherein the single chip microcomputer is detachably connected with the dew point sensor;

the dew point sensor adopts a POM172 dew point sensor;

the singlechip adopts the STM32 singlechip, and STM32 singlechip is connected with and is used for can dismantling the POM172 interface of being connected with POM172 dew point sensor, the storage module that is used for the storage data, is used for showing digital display module, is used for being connected the USB module of transmission data and the power module that is used for supplying power with the host computer, power module adopts the lithium cell power supply.

Furthermore, the display module adopts a serial port screen.

Further, the power module comprises a charging module, a lithium battery and a power management module which are connected in sequence.

Further, the storage module adopts a programmable read-only memory.

The utility model adopts the combination of the POM172 dew point sensor and the STM32 single chip microcomputer, relates to a hand-held low-power-consumption dew point detector, is convenient for moving and detecting dew points, and directly realizes the acquisition result through a display screen, thereby being convenient for visually obtaining dew point data; the device has the advantages of small volume, high detection efficiency, low cost and the like.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is the schematic diagram of the single chip microcomputer of the present invention.

Fig. 3 is a schematic diagram of the interface circuit of the POM172 of the present invention.

Fig. 4 is a schematic circuit diagram of the memory module of the present invention.

Fig. 5 is a schematic circuit diagram of the USB module of the present invention.

Fig. 6 is a schematic circuit diagram of the display module of the present invention.

Fig. 7 is a schematic circuit diagram of the power management module of the present invention.

Detailed Description

As shown in fig. 1, the novel portable handheld dew point instrument provided by this embodiment includes a dew point sensor, a single chip microcomputer, a storage module, a display module and a power module, and the single chip microcomputer is respectively connected with the dew point sensor, the storage module, the display module and the power module.

The single chip microcomputer is an operation and control core of the embodiment, because the dew point detector of the embodiment is handheld and small in size, and a large-size battery cannot be arranged in the dew point detector, a low-power-consumption single chip microcomputer chip with a data processing function and program operation needs to be adopted, the STM32 single chip microcomputer is a high-performance, low-cost and low-power-consumption single chip microcomputer, the embodiment specifically adopts STM32L151C8T6, as shown in FIG. 2, pins 11 and 22 of STM32L151C8T6 are connected with a POM172 interface, pins 41-43 are connected with a storage module, and pins 29 and 32 are connected with a display module; pins 13-19 are connected with a USB module, and the single chip microcomputer is also connected with a crystal oscillator module, a status indicator lamp and a programming interface;

pins

5 and 6 are connected with a crystal oscillator module, and the crystal oscillator adopts 12 MHZ; pin 25 is connected with a status indicator light, pins 34 and 35 are connected with a programming interface for PC connection, program writing for a single chip, data processing flow and other restrictions.

The POM172 interface is an interface matched with the dew point sensor, the interface is detachably connected with the POM172 dew point sensor, the contact position can be realized through threads or buckles, and other structures which are convenient to detach in the prior art can also be adopted. The dew point sensor is used for collecting dew point data, the embodiment specifically adopts a POM172 dew point sensor, and the dew point sensor adopts a novel high-precision and high-stability online dew point transmitter developed by an alpha phase new semiconductor material chip technology developed by SII; the method is suitable for industrial environments with low dew points and dry point control requirements. The POM172 dew point transmitter is widely applied to the detection of the moisture content in various gases in air separation, petrochemical industry, natural gas, metallurgy, drying equipment, electronic power, mechanical manufacturing and other industries; measurement range: 80 to 20 ℃ below zero to 100 to 20 ℃ (two ranges range); precision: plus or minus 2 ℃; standard pressure: 5mpa, extensible to 15mpa, response time: 5 min; and small, be applicable to the small novel portable handheld dew point hygrometer of design. The dew point sensor is connected with the single chip microcomputer through a circuit, as shown in fig. 3, a pin 2 of the dew point sensor is connected with a pin 11 of the single chip microcomputer and used for converting an analog signal collected by the dew point sensor into a digital signal and sending the digital signal to the single chip microcomputer, and a pin 22 of the single chip microcomputer is connected with a pin 3 of the dew point sensor and used for sending a data collection instruction to the dew point sensor through the single chip microcomputer.

The storage module is used for storing acquired data, the storage module can adopt a memory with a data storage function in the prior art, the embodiment adopts a programmable read only memory, and specifically adopts an AT24C256 chip, as shown in FIG. 4, pins 1-4 of the AT24C256 chip are grounded, pins 5-6 are respectively connected with 41-43 of the single chip microcomputer, pin 5 is connected with pin 43 to realize data storage and reading and writing, pin 6 is connected with pin 42 to realize that the single chip microcomputer sends a control instruction to the memory.

The USB module is used for being connected with an upper computer to achieve that the upper computer obtains dew point data stored in the storage module, as shown in fig. 5, the USB module adopts a CH376S chip, and

pins

1 and 2 of the CH376S chip are connected with pins 13 and 14 of the single chip microcomputer and used for controlling input and output of the USB through the single chip microcomputer; the pin 10 and the pin 11 are connected with a USB interface and are connected with an upper computer through a USB data line; pins 18-22 are connected with 15-19 of the single chip microcomputer, and data in the storage module are acquired through the SPI serial port interface.

The display module is used for displaying dew point data collected in real time and the dew point data stored in the storage module historically, a serial port screen is specifically adopted in the embodiment, as shown in fig. 6, a Guangzhou Dacai serial port screen is specifically adopted, a communication interface is reserved on the Guangzhou Dacai serial port screen and is connected with corresponding pins of the single chip microcomputer, the single chip microcomputer controls the Guangzhou Dacai serial port screen, pins 1, 3-5 of the communication interface are connected with pins 19-32 of the single chip microcomputer, and

pins

3 and 4 are connected with

pins

20 and 21 of the single chip microcomputer and are used for controlling input and output of the display screen; pin 1 is connected to the single chip 19 for clock synchronization, and pin 5 is connected to the single chip 32 for obtaining the status of the display screen. According to the program requirement set in the single chip microcomputer, historical data can be connected to form linear state display.

The power module is used for providing working voltage for each module, the embodiment specifically adopts a lithium battery for power supply, the lithium battery is a rechargeable lithium battery, and a charging module which is connected with the lithium battery and used for charging the lithium battery is adopted, and the charging module is realized by adopting the existing adapter and the like; and the power management module is connected with the lithium battery and converts the electric eye of the lithium battery into working voltage of each chip, and as shown in fig. 7, the power management module outputs stable working voltage after the voltage of the lithium battery is reduced by the MP1584 chip and then is stabilized by the AMS1117 chip.

The above is only the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and the utility model should be covered in the protection scope of the present invention.

Claims

1. The utility model provides a novel portable handheld dew point hygrometer, includes dew point sensor and the singlechip of being connected with dew point sensor, its characterized in that: the single chip microcomputer is detachably connected with the dew point sensor;

the dew point sensor adopts a POM172 dew point sensor;

2. The novel portable handheld dew point instrument of claim 1, wherein: the display module adopts a serial port screen.

3. The novel portable handheld dew point instrument of claim 1, wherein: the power module comprises a charging module, a lithium battery and a power management module which are sequentially connected.

4. The novel portable handheld dew point instrument of claim 1, wherein: the storage module adopts a programmable read-only memory.