Instrument for measuring oxygen concentration

Abstract

The utility model discloses an instrument for measuring oxygen concentration, which comprises an oxygen concentration measuring instrument electrically connected with a system power supply module. The oxygen concentration measuring instrument comprises a zirconium oxide oxygen sensor, the zirconium oxide oxygen sensor is electrically connected with an amplifying circuit, an oxygen sensor heating circuit and an oxygen sensor reference circuit, and the oxygen sensor heating circuit and the oxygen sensor reference circuit are electrically connected with the same single chip microcomputer; the instrument adopts the limiting current zirconium oxide oxygen sensor, is not easily influenced by the change of external temperature, realizes the accurate measurement of real-time oxygen concentration, is wide in working temperature range, high in measurement precision, high in response speed and long in service life, can display the current oxygen content and somatosensory altitude, and is convenient to use. A user can conveniently know the oxygen concentration and the somatosensory altitude of the current environment, and a visual impression is provided for the environment where the user is located.

Description

Technical Field

[0001] The utility model relates to the technical field of oxygen measuring equipment, in particular to an instrument for measuring oxygen concentration. Background Art

[0002] Oxygen concentration detector is an instrument used to detect the oxygen concentration in the environment. It is widely used in agriculture, chemical industry, gas detection, general industry, manufacturing, mining and other places.

[0003] The existing oxygen concentration measuring instruments still have the following problems: (1) Oxygen concentration measuring instruments generally use electrochemical sensors, which have a short overall lifespan and a narrow operating temperature range. They need to be calibrated frequently, so the sensors need to be replaced frequently and the instruments need to be calibrated frequently. (2) The human-computer interaction page generally uses an LED digital tube display screen and is equipped with several buttons, which is inflexible to operate and displays little information that is not intuitive. (3) Instrument networking generally uses a wired interface, and on-site construction requires wiring. Therefore, an oxygen concentration measuring instrument is needed to meet people's needs. Utility Model Content

[0004] The purpose of the utility model is to provide an instrument for measuring oxygen concentration to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an instrument for measuring oxygen concentration, comprising an oxygen concentration measuring instrument, the oxygen concentration measuring instrument being electrically connected to a system power supply module; the oxygen concentration measuring instrument comprising a zirconium oxide oxygen sensor, the zirconium oxide oxygen sensor being electrically connected to an amplifier circuit, an oxygen sensor heating circuit and an oxygen sensor reference circuit, the oxygen sensor heating circuit and the oxygen sensor reference circuit being electrically connected to the same single-chip microcomputer, the single-chip microcomputer being electrically connected to a WIFI module, an integrated atmospheric pressure sensor and an A / D converter, the A / D converter being electrically connected to the amplifier circuit, and the single-chip microcomputer being electrically connected to a current loop module, a switch output module and a touch display screen assembly.

[0006] Preferably, the touch display screen assembly includes an LCD color touch display, and the LCD color touch display adopts a full-screen capacitive touch screen.

[0007] Preferably, the zirconium oxide oxygen sensor comprises a heating element, and the heating element is electrically connected to a heating circuit of the oxygen sensor.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] (1) The utility model adopts a limiting current zirconium oxide oxygen sensor, which is not easily affected by changes in external temperature, and can achieve accurate measurement of real-time oxygen concentration. It has a wide operating temperature range, high measurement accuracy, fast response speed, and long service life. It can also display the current oxygen content and perceived altitude, making it convenient for users to understand the current ambient oxygen concentration and perceived altitude, and have an intuitive impression of the environment in which they are located.

[0010] (2) The instrument is provided with a touch screen component and an LCD color touch display as a human-machine interface. The LCD color touch display can be operated by touching the screen, and can more intuitively display information such as oxygen content, altitude, and perceived altitude. The instrument can also use a WIFI module to access the WIFI network, eliminating the tedious process of connecting the network cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The utility model discloses a structural schematic diagram of an instrument for measuring oxygen concentration.

[0012] In the figure: 100, oxygen concentration measuring instrument; 101, zirconium oxide oxygen sensor; 102, amplifier circuit; 103, oxygen sensor heating circuit; 104, oxygen sensor reference circuit; 105, single-chip microcomputer; 106, WIFI module; 107, integrated atmospheric pressure sensor; 108, A / D converter; 109, current loop module; 110, switch output module; 111, touch display assembly; 112, LCD color touch display; 113, heating element; 200, system power supply module. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] See also Figure 1The utility model provides a technical solution: an instrument for measuring oxygen concentration, including an oxygen concentration measuring instrument 100, the oxygen concentration measuring instrument 100 is electrically connected to a system power supply module 200; the oxygen concentration measuring instrument 100 includes a zirconium oxide oxygen sensor 101, the zirconium oxide oxygen sensor 101 is electrically connected to an amplifier circuit 102, an oxygen sensor heating circuit 103 and an oxygen sensor reference circuit 104, the oxygen sensor heating circuit 103 and the oxygen sensor reference circuit 104 are electrically connected to the same single-chip computer 105, the single-chip computer 105 is electrically connected to a WIFI module 106, an integrated atmospheric pressure sensor 107 and an A / D converter 108, the A / D converter 108 is electrically connected to the amplifier circuit 102, the single-chip computer 105 is electrically connected to a current loop module 109, a switch output module 110 and a touch display screen component 111, the touch display screen component 111 includes an LCD color touch display 112, the LCD color touch display 112 adopts a full-screen capacitive touch screen, the zirconium oxide oxygen sensor 101 includes The oxygen sensor heating circuit 103 includes a heating element 113, which is electrically connected to the oxygen sensor heating circuit 103. The oxygen sensor heating circuit 103 is used to drive the heating element 113 inside the zirconia oxygen sensor 101, so that the zirconia oxygen sensor 101 reaches the operating temperature so as to measure oxygen information. The oxygen sensor reference circuit 104 drives the zirconia oxygen sensor 101 to output a current signal associated with oxygen. This signal is input into the amplifier circuit 102 and converted into a voltage signal. The analog voltage is converted into a digital quantity through the A / D converter 108 and transmitted to the single-chip microcomputer 105. The atmospheric pressure can be converted into a digital quantity by using the integrated atmospheric pressure sensor 107 and sent to the single-chip microcomputer 105. The switch output module 110 can convert the detected oxygen concentration into a corresponding 4-20mA signal and output it to the single-chip microcomputer 105. The touch screen component 111 and the LCD color touch display 112 are used to realize the human-machine interface, and the oxygen content, altitude, and somatosensory altitude information received by the single-chip microcomputer 105 can be displayed by the LCD color touch display 112.

[0015] The working principle is as follows: by setting the system power supply module 200, the input 220VAC can be converted into the voltage required by the oxygen concentration measuring instrument 100 to power the oxygen concentration measuring instrument 100 and other modules. When in use, the oxygen sensor heating circuit 103 is used to drive the heating element 113 inside the zirconia oxygen sensor 101, so as to prompt the zirconia oxygen sensor 101 to reach the working temperature so as to measure oxygen information, and the oxygen sensor reference circuit 104 drives the zirconia oxygen sensor 101 to output a current signal associated with oxygen. This signal is input to the amplifier circuit 102 and converted into a voltage signal. The analog voltage is converted into a digital quantity through the A / D converter 108 and transmitted to the single-chip microcomputer 105. The oxygen sensor reference circuit 104 and the oxygen sensor heating circuit 103 are both controlled by the single chip microcomputer 105. The microcontroller 105 outputs a suitable voltage to drive the zirconium oxide oxygen sensor 101 according to the specific state. The integrated atmospheric pressure sensor 107 is connected to the microcontroller 105. The integrated atmospheric pressure sensor 107 can convert the atmospheric pressure into a digital quantity and send it to the microcontroller 105. The switch output module 110 can convert the detected oxygen concentration into a corresponding 4-20mA signal and output it to the microcontroller 105. At the same time, it can output an alarm switch signal to the outside. The touch screen component 111 and the LCD color touch display 112 are used to realize the human-machine interface. The oxygen content, altitude, and somatosensory altitude information received by the microcontroller 105 can be displayed using the LCD color touch display 112, and touch operation can be performed. The WIFI module 106 can be used to connect the instrument to the WIFI network.

[0016] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An instrument for measuring oxygen concentration, comprising an oxygen concentration measuring instrument (100), wherein the oxygen concentration measuring instrument (100) is electrically connected to a system power supply module (200); characterized in that: The oxygen concentration measuring instrument (100) comprises a zirconium oxide oxygen sensor (101), the zirconium oxide oxygen sensor (101) is electrically connected to an amplifier circuit (102), an oxygen sensor heating circuit (103) and an oxygen sensor reference circuit (104), the oxygen sensor heating circuit (103) and the oxygen sensor reference circuit (104) are electrically connected to the same single-chip computer (105), the single-chip computer (105) is electrically connected to a WIFI module (106), an integrated atmospheric pressure sensor (107) and an A / D converter (108), the A / D converter (108) is electrically connected to the amplifier circuit (102), and the single-chip computer (105) is electrically connected to a current loop module (109), a switch output module (110) and a touch display screen assembly (111).

2. An instrument for measuring oxygen concentration according to claim 1, characterized in that: The touch display screen assembly (111) comprises an LCD color touch display (112), and the LCD color touch display (112) adopts a full-screen capacitive touch screen.

3. The instrument for measuring oxygen concentration according to claim 1, characterized in that: The zirconium oxide oxygen sensor (101) comprises a heating element (113), and the heating element (113) is electrically connected to the oxygen sensor heating circuit (103).

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