CN212748851U

CN212748851U - Formaldehyde detector

Info

Publication number: CN212748851U
Application number: CN202021452397.5U
Authority: CN
Inventors: 王景华
Original assignee: Weifang Kaobo Automation Technology Co ltd
Current assignee: Weifang Kaobo Automation Technology Co ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2021-03-19
Anticipated expiration: 2030-07-21

Abstract

The utility model discloses a formaldehyde detector, wherein a formaldehyde detection sensor is connected with a USB conversion module and a single chip processor, the USB conversion module filters formaldehyde detection signals, and the single chip processor processes the acquired formaldehyde detection signals and then outputs formaldehyde detection information; the single chip processor is connected with an OLED display screen, and the OLED display screen displays formaldehyde detection information; the formaldehyde detection sensor, the single-chip microcomputer processor and the OLED display screen are powered by the USB power supply module, and can work immediately by only inserting the USB interface to be powered, so that formaldehyde detection information is detected and output to the OLED display screen.

Description

Formaldehyde detector

Technical Field

The utility model belongs to the air quality detection field specifically is an instrument for detecting indoor formaldehyde parameter.

Background

In daily life and work of people, formaldehyde in indoor air is a main pollutant affecting body health. According to the relevant national standards, after the door and the window are closed for 1 hour, the formaldehyde emission amount in each cubic meter of indoor air is not more than 0.08 milligram; if the weight of the tea reaches 0.1-2.0 mg, 50% of normal people can smell odor; when the dosage reaches 2.0-5.0 mg, eyes and trachea are strongly stimulated, and symptoms such as sneezing, cough and the like appear; more than 10 mg, dyspnea; more than 50 mg, the medicine can cause serious diseases such as pneumonia and even death. Chronic respiratory diseases, nasopharyngeal carcinoma, colon cancer, menstrual disorder, gene mutation of cell nucleus, DNA single-strand internal cross-linking, DNA and protein cross-linking, and inhibition of repair of DNA damage, pregnancy syndrome, neonatal chromosomal abnormality, leukemia caused by long-term exposure to low-dose formaldehyde can cause memory and intelligence decline of teenagers.

The professional formaldehyde detection equipment detection principle is unsmooth, the operation method is complex and is not easy to master, the traditional formaldehyde self-detection box is used for one-time detection or one-time detection, resource waste is easily caused, in addition, the formaldehyde self-detection box is used for multiple times of detection, the operation is inconvenient, the reaction reagent is required to be measured again without carrying out one-time new detection, and the time is wasted.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a formaldehyde detector of easy operation, strong, the real-time display measured value of portability.

In order to solve the technical problem, the utility model discloses a technical scheme be: a formaldehyde detector comprises a formaldehyde detection sensor, wherein the formaldehyde detection sensor is connected with a USB conversion module and a single-chip microcomputer processor, the USB conversion module filters formaldehyde detection signals, and the single-chip microcomputer processor processes the acquired formaldehyde detection signals and then outputs formaldehyde detection information; the single chip processor is connected with an OLED display screen, and the OLED display screen displays formaldehyde detection information; the formaldehyde detection sensor, the single-chip microcomputer processor and the OLED display screen are powered by the USB power supply module.

Furthermore, the USB power supply module is connected with a battery, and the USB power supply module charges the battery.

Furthermore, a boosting chip is connected between the battery and the single chip processor, and the internal and external power supply modes of the boosting chip are switched.

Implement the technical scheme of the utility model, through setting up USB power module and OLED display screen, only need insert the USB interface during use and get electric alright instant work, USB conversion module and singlechip treater handle the back, obtain to detect formaldehyde and detect information output to OLED display screen, not only convenient to carry and easily operation can detect the application anytime and anywhere, show the formaldehyde measured value in real time developments, extensively are applicable to ordinary crowd daily use.

Drawings

Fig. 1 is a circuit diagram of a formaldehyde detection sensor.

Fig. 2 is a circuit diagram of the USB power supply module.

FIG. 3 is a circuit diagram of the USB adapter module.

Fig. 4 is a circuit diagram of the single chip microcomputer.

Fig. 5 is a circuit diagram of the boost chip.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, the formaldehyde detector mainly comprises a USB power supply module, an OLED display screen, a formaldehyde detection sensor, a single-chip processor, a USB switching module, a boost chip U2(SX1308), and other components.

The formaldehyde detection sensor converts the formaldehyde content into an electric signal, and a chip U4 of the formaldehyde detection sensor is of an HCHO type. And the single chip processor processes the acquired formaldehyde detection signal and outputs formaldehyde detection information. The chip U3 of the USB switching module adopts a CH340G type, and the chip U1 of the singlechip processor adopts an ATtiny44A type. The OLED display screen, the formaldehyde detection sensor and the single-chip processor are all powered by 5V power supplied by the USB power supply module, and the internal and external power supply modes of the voltage boosting chip U2(SX1308) are switched. The formaldehyde sensor is connected with the single chip microcomputer processor, the single chip microcomputer processor is in serial signal communication, and the OLED display screen is connected with the single chip microcomputer processor. The USB power supply module is also used for charging the battery, and the battery supplies power for the detector circuit.

After the USB power supply module is switched on, asynchronous serial port communication or serial signal output is switched through the dial switch S1, the crystal oscillator Y1(12MHZ) of the USB switching module works, power supply and filtering are carried out on the crystal oscillator Y1, and detected formaldehyde detection information is obtained and output to the OLED display screen.

The dial switch S1 is connected to the TXD pin, RXD pin, UD + pin, and UD-pin of the USB transfer module chip U3(CH 340G). A UARTTX pin and a UARTRX pin of a formaldehyde detection sensor chip U4(HCHO) are connected with a TXD pin and an RXD pin of a singlechip processor chip U1(ATtiny 44A). An SX pin of the single chip microcomputer processor chip U1(ATtiny44A) is connected with an EN pin of the boost chip U2(SX1308), and an SCL pin and an SDA pin of the single chip microcomputer processor chip U1(ATtiny44A) are connected with the OLED display screen.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

Claims

1. The utility model provides a formaldehyde detector, includes formaldehyde detection sensor, its characterized in that: the formaldehyde detection sensor is connected with the USB conversion module and the single-chip microcomputer processor, the USB conversion module filters formaldehyde detection signals, and the single-chip microcomputer processor processes the acquired formaldehyde detection signals and then outputs formaldehyde detection information; the single chip processor is connected with an OLED display screen, and the OLED display screen displays formaldehyde detection information; the formaldehyde detection sensor, the single-chip microcomputer processor and the OLED display screen are powered by the USB power supply module.

2. The formaldehyde detector as set forth in claim 1, wherein: the USB power supply module is connected with the battery and charges the battery.

3. The formaldehyde detector according to claim 2, wherein: and a boosting chip is connected between the battery and the single chip processor, and the internal and external power supply modes of the boosting chip are switched.