CN203909013U - Carbon dioxide concentration display device - Google Patents

Abstract

The utility model discloses a carbon dioxide concentration display device, comprising a carbon dioxide concentration detector, the carbon dioxide concentration detector is used to detect the carbon dioxide concentration in the environment, and outputs a high-impedance voltage signal, and the display device includes a voltage follower, a differential amplifier, an in-phase amplifier and multiple A comparator; the output terminal of the carbon dioxide concentration detector is connected with the input terminal of the voltage follower, and the voltage follower is used to reduce the voltage signal output by the carbon dioxide concentration detector; the output terminal of the voltage follower is connected with the input terminal of the differential amplifier, and the output terminal of the differential amplifier is connected Connected to the input terminal of the non-inverting amplifier, the differential amplifier and the non-inverting amplifier are used to amplify the voltage signal output by the voltage follower; all comparators are connected in parallel, and the output terminals of the non-inverting amplifier are respectively connected to the input terminals of each comparator, and the output terminals of the non-inverting amplifier The voltage of the comparator is used as the non-inverting input voltage of all comparators; each comparator is connected to an LED lamp, and is used to control the on and off of the LED lamp.

Description

Carbon dioxide concentration display device

technical field

The utility model relates to the technical field of gas concentration monitoring, in particular to a carbon dioxide concentration display device.

Background technique

In greenhouses or cellar storage warehouses, people need to know the concentration of carbon dioxide in the environment, and then take corresponding measures to make the concentration of carbon dioxide in the greenhouse the most suitable for plant photosynthesis, make the concentration of carbon dioxide in the cellar the most suitable for storage, and inform Appropriate time for personnel to enter the cellar.

Utility model content

The purpose of the utility model is to solve the above technical problems and provide a carbon dioxide concentration display device, which can inform people of the carbon dioxide concentration in the environment and remind people to take measures to adjust the carbon dioxide concentration in the environment.

In order to achieve the above object, the utility model adopts the following technical solutions.

A carbon dioxide concentration display device, including a carbon dioxide concentration detector, the carbon dioxide concentration detector is used to detect the carbon dioxide concentration in the environment, and output a high impedance voltage signal, the display device also includes a voltage follower, a differential amplifier, a non-inverting amplifier and a plurality of comparators; the output terminal of the carbon dioxide concentration detector is connected to the input terminal of the voltage follower, and the voltage follower is used to reduce the voltage signal output by the carbon dioxide concentration detector; the output terminal of the voltage follower Connected to the input end of the differential amplifier, the output end of the differential amplifier is connected to the input end of the non-inverting amplifier, the differential amplifier and the non-inverting amplifier are used to amplify the voltage signal output by the voltage follower ; All the comparators are connected in parallel, and the output terminals of the non-inverting amplifiers are respectively connected to the input terminals of each of the comparators, and the voltage output by the non-inverting amplifier is used as the non-inverting input voltage of all the comparators; The comparator is connected with an LED lamp and is used to control the LED lamp to turn on and off.

Further, the device also includes a regulated power supply, which is used to provide power.

Further, the stabilized power supply is provided by a battery or a commercial power supply after rectification and stabilization.

Further, the output terminal of the non-inverting amplifier is connected to the input terminal of an alarm, and when the output voltage of the non-inverting amplifier is greater than the preset starting voltage of the alarm, the alarm will alarm.

Further, the non-inverting amplifier includes a proportional adjusting resistor, and the proportional adjusting resistor is used to adjust the output voltage of the non-inverting amplifier.

Further, the device also includes a casing, the carbon dioxide concentration detector, voltage follower, differential amplifier, non-inverting amplifier and a plurality of comparators are arranged inside the casing, and the casing includes an LED light display port and a gas inlet and outlet The LED lamp display port is used to display the light emitted by the LED lamp, the gas inlet and outlet allow gas to enter and exit the casing, and the carbon dioxide concentration detector is arranged on the gas circulation path.

Further, the housing also includes a power indicator light, which is used to indicate whether the power is turned on.

The utility model has the advantage that by arranging a plurality of comparators, people are notified step by step of the carbon dioxide concentration level in the current environment, so that people can take corresponding countermeasures, for example, take corresponding measures to make the concentration of carbon dioxide in the greenhouse most suitable. Plant photosynthesis makes the carbon dioxide concentration in the cellar most suitable for storage, and informs personnel of the appropriate time to enter the cellar.

Description of drawings

Fig. 1 is the structural diagram of the carbon dioxide concentration display device of the present utility model;

Fig. 2 is a structural schematic diagram of the carbon dioxide concentration display device of the present invention.

Detailed ways

The specific implementation of the carbon dioxide concentration display device provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

Referring to Fig. 1, the carbon dioxide concentration display device of the present invention includes a carbon dioxide concentration detector 1, which is used to detect the concentration of carbon dioxide in the environment and output a high-impedance voltage signal.

The device also includes a voltage follower 2 , a differential amplifier 3 , a non-inverting amplifier 4 and a plurality of comparators 5 .

The output terminal of the carbon dioxide concentration detector 1 is connected to the input terminal of the voltage follower 2, and the carbon dioxide concentration signal detected by the carbon dioxide concentration detector 1 is converted into a high-impedance voltage signal and transmitted to the voltage follower 2 . The voltage follower 2 reduces the high-impedance voltage signal received from the carbon dioxide concentration detector 1 .

The output terminal of the voltage follower 2 is connected to the input terminal of the differential amplifier 3 , and the output terminal of the differential amplifier 3 is connected to the input terminal of the non-inverting amplifier 4 . The differential amplifier 3 and the non-inverting amplifier 4 are used to amplify the voltage signal output by the voltage follower 2 .

All the comparators 5 are connected in parallel, and the output terminals of the non-inverting amplifier 4 are respectively connected to the input terminals of each of the comparators 5, and the voltage output by the non-inverting amplifier 4 is used as the non-inverting input of all the comparators 5 Voltage.

Each of the comparators 5 is connected to an LED lamp 6 for controlling the LED lamp 6 to turn on and off. If the impedances of multiple comparators 5 are different, the output voltages will be different, and the voltages transmitted to the LED lamp 6 will be different. Only when the working voltage of the LED lamp 6 is reached, the LED lamp 6 will emit light.

Further, the device also includes a regulated power supply 7, which is used to provide power. In this specific implementation manner, the regulated power supply is provided by a battery or a commercial power supply after rectification and stabilization.

Further, the output terminal of the non-inverting amplifier 4 is connected to the input terminal of an alarm 8, and when the output voltage of the non-inverting amplifier 4 is greater than the preset starting voltage of the alarm 8, the alarm 8 will alarm. Described alarm 8 alarm can adopt sound alarm, also can adopt light alarm, or both combine alarm, remind people that the concentration of carbon dioxide exceeds the standard.

Further, the non-inverting amplifier 4 also includes a proportional adjustment resistor (not shown in the drawings), and the proportional adjustment resistor is used to adjust the output voltage of the non-inverting amplifier 4 .

Further, referring to Fig. 2, the device also includes a housing 9, the carbon dioxide concentration detector 1, voltage follower 2, differential amplifier 3, non-inverting amplifier 4 and a plurality of comparators 5 are arranged inside the housing 9 , the housing 9 includes an LED display port 10 , a gas inlet and outlet 11 , a speaker port 12 and a power indicator 13 . The LED lamp display port 10 is used to display the light emitted by the LED lamp 6, and the LED lamp 6 protrudes from the LED lamp display port 10, or the light emitted by the LED lamp 6 passes through the LED lamp display port 10 show. The gas inlet and outlet 11 allow the gas in the environment to enter and exit the housing 9, and the carbon dioxide concentration detector 1 is arranged on the gas circulation path. The speaker port 12 is used to diffuse the alarm sound of the alarm device 8 . The power indicator light 13 is used to indicate whether the power is turned on.

The working principle of the utility model carbon dioxide concentration display device is as follows:

The carbon dioxide concentration detector 1 senses the carbon dioxide concentration in the environment and outputs a high-impedance voltage signal. After the voltage follower 2 reduces the impedance, it is amplified by the differential amplifier 3 and the non-inverting amplifier 4. The output signal is used as the non-inverting signal of multiple comparators 5. The input voltage, multiple comparators output different voltages to control the on and off of multiple LED lamps 6 . Here, five comparators 5 are taken as an example for illustration, and the impedances of the five comparators 5 increase sequentially. When the carbon dioxide concentration in the environment reaches the warning value, the non-inverting amplifier 4 outputs a relatively high voltage, and the LED light of the first comparator lights up to inform the suitability of the carbon dioxide concentration at this time. For example, LED lights of four colors can be used Green, blue, yellow and red represent low concentration, suitable concentration, higher concentration and prohibited concentration; as the concentration of carbon dioxide in the air increases gradually, the LED lights 6 of the second, third, fourth and fifth comparators 5 are all Lighting, along with the increase of the number of lighted LED lamps 6, shows the height of the carbon dioxide concentration in the air, and the suitable degree of the carbon dioxide concentration at this moment, thereby just should take appropriate measures.

For example, if you want to keep the concentration of carbon dioxide in a greenhouse to maintain the best photosynthesis state, you can set the blue light to indicate the best state. When the green light is on, increase the concentration of carbon dioxide to the blue light, and the yellow light is on. When the red light is on, it means that the concentration of carbon dioxide is too high, which will affect the normal photosynthesis of plants. And the starting voltage of the alarm 9 is higher than the voltage of the LED lamp. When the carbon dioxide concentration reaches a very high level, except that the 4 LED lamps are lighted, the alarm 9 also reports to the police through the speaker port 12, and can also alarm simultaneously with sound and light. , indicating that the concentration of carbon dioxide is very high, and corresponding measures need to be taken to reduce the concentration of carbon dioxide.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made. It should be regarded as the protection scope of the present utility model. 

Claims (7)

1. A carbon dioxide concentration display device, comprising a carbon dioxide concentration detector, the carbon dioxide concentration detector is used to detect the carbon dioxide concentration in the environment, and outputs a high impedance voltage signal, it is characterized in that the display device also includes a voltage follower, A differential amplifier, a non-inverting amplifier and a plurality of comparators; the output terminal of the carbon dioxide concentration detector is connected to the input terminal of the voltage follower, and the voltage follower is used to reduce the voltage signal output by the carbon dioxide concentration detector; The output terminal of the voltage follower is connected to the input terminal of the differential amplifier, the output terminal of the differential amplifier is connected to the input terminal of the non-inverting amplifier, and the differential amplifier and the non-inverting amplifier are used to follow the voltage The voltage signal output by the non-inverting amplifier is amplified; all the comparators are connected in parallel, and the output terminals of the non-inverting amplifiers are respectively connected to the input terminals of each of the comparators, and the voltage output by the non-inverting amplifier is used as the voltage of all the comparators A non-inverting input voltage; each of the comparators is connected to an LED light, and is used to control the on and off of the LED light. 2 . The carbon dioxide concentration display device according to claim 1 , characterized in that the device further comprises a regulated power supply, and the regulated power supply is used to provide power. 3 . 3 . The carbon dioxide concentration display device according to claim 2 , wherein the stabilized power supply is provided by a battery or a commercial power after rectification and stabilization. 4 . 4. The carbon dioxide concentration display device according to claim 1, wherein the output terminal of the non-inverting amplifier is connected to the input terminal of an alarm, and when the output voltage of the non-inverting amplifier is greater than the preset value of the alarm When the voltage is started, the alarm will alarm. 5. The carbon dioxide concentration display device according to claim 1, wherein the non-inverting amplifier includes a proportional adjustment resistor, and the proportional adjusting resistor is used to adjust the output voltage of the non-inverting amplifier. 6. The carbon dioxide concentration display device according to claim 1, characterized in that, the device further comprises a casing, and the carbon dioxide concentration detector, voltage follower, differential amplifier, non-inverting amplifier and a plurality of comparators are arranged on Inside the shell, the shell includes an LED light display port and a gas inlet and outlet, the LED light display port is used to display the light emitted by the LED light, the gas port allows gas to enter and exit the shell, and the carbon dioxide concentration detector is set in the gas flow path. 7. The carbon dioxide concentration display device according to claim 6, wherein the housing further includes a power indicator light for indicating whether the power is turned on.