Gas detector with detachable gas sensor

Abstract

The utility model relates to the technical field of gas detection, and specifically provides a gas detector with a detachable gas sensor, comprising a central processing unit, a gas sensing unit, an interface unit, an operational amplifier unit, an analog-to-digital conversion unit, a temperature and humidity detection unit, an indicator light unit, a relay unit, a pump unit, a storage unit, a button unit, and an Ethernet unit, wherein the operational amplifier unit is connected to a voltage stabilizing unit; a pluggable three-way electrical connector is provided on the gas sensing unit, and the gas sensing unit is pluggable and electrically connected to an interface chip U1 and an operational amplifier through the three-way electrical connector; the utility model adopts a quick plug-in form, which can replace and apply the gas sensor more quickly; the gas detector with a detachable gas sensor can be controlled by buttons, which is convenient for on-site operation; and an indicator light unit is provided, which can intuitively distinguish the on-site application failure of the gas detector with the detachable gas sensor and feedback the on-site detection status.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detection, in particular to a gas detector with a detachable gas sensor. Background Art

[0002] The gas detector with a detachable gas sensor, that is, the gas detection alarm, is mainly used to detect the concentration of chemical gases in the environment. When the gas reaches the preset concentration value, the instrument will send out an audible and visual alarm to remind the staff in the area to evacuate in time and take effective measures such as ventilation and air exchange to avoid high concentrations of toxic and flammable gases that endanger the safety of life and property.

[0003] The gas detection alarms used in existing hormones detect a single type of gas, while the gases present in the actual on-site ambient air are diverse, and a single form of detection method is not effective in detecting the gas concentration in the on-site ambient air. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a gas detector with a detachable gas sensor, which is used to solve the problem that the prior art adopts a single form of detection method for detecting the gas concentration of the on-site ambient air is not effective.

[0005] In order to achieve the above-mentioned object and other related objects, the utility model provides a gas detector with a detachable gas sensor, comprising:

[0006] Central processing unit, the central processing unit adopts a main control chip U2;

[0007] A gas sensing unit, wherein the gas sensing unit uses at least one electrochemical sensor to monitor the concentration of chemical gases in the ambient air;

[0008] An interface unit, wherein the interface unit uses an interface chip U1, and the electrochemical sensor is connected to the interface chip U1;

[0009] An operational amplifier unit, wherein the operational amplifier unit uses at least two operational amplifiers connected in series, with the reverse input terminal of the operational amplifier connected to the interface chip U1 and the same input terminal connected to the interface chip U1, for amplifying the gas concentration detection signal;

[0010] The analog-to-digital conversion unit adopts an analog-to-digital conversion chip U14, which is connected between the output end of the operational amplifier and the main control chip U2, and is used to convert the detection information of the analog signal into a digital signal;

[0011] A temperature and humidity detection unit, wherein the temperature and humidity detection unit uses a silicon diode D3 to monitor the temperature and humidity in the ambient air; the output end of the silicon diode D3 is connected to the interface chip U1;

[0012] The gas sensing unit, the interface unit and the operational amplifier unit are all provided with electrical connectors, and a pluggable three-way electrical connector is provided between the gas sensing unit, the interface unit and the operational amplifier unit.

[0013] In one embodiment of the present invention, the gas detector of the detachable gas sensor further includes an indicator light unit. The indicator light unit uses a plurality of light emitting diodes. The plurality of light emitting diodes are connected in parallel on the main control chip U2.

[0014] In one embodiment of the present invention, a MOS switch is provided between the single light emitting diode and the main control chip U2 , the base of the MOS switch is connected to the main control chip U2 , the collector is connected to the output end of the light emitting diode, and the emitter is grounded.

[0015] In one embodiment of the present invention, a relay unit is provided between the indicator light unit and the central processing unit. The relay unit uses a relay K1 to control the indicator light unit to light up.

[0016] In one embodiment of the present invention, a voltage stabilizing unit is connected to the operational amplifier unit. The voltage stabilizing unit uses a voltage stabilizer U12 for voltage stabilization during operational amplifier operation.

[0017] In one embodiment of the utility model, the central processing unit is also connected to a pump unit, a storage unit, a key unit, and an Ethernet unit.

[0018] The pump unit uses a pump control board U7 to deliver ambient air to the gas sensing unit;

[0019] The storage unit uses a memory U4 for storing application information of the gas detector of the detachable gas sensor;

[0020] The key unit includes keys for controlling different functions for human-computer interaction;

[0021] The Ethernet unit uses a network transformer L1 to provide a wired connection so that the gas detector with a detachable gas sensor has a network communication function.

[0022] As described above, the gas detector with a detachable gas sensor of the utility model has the following beneficial effects:

[0023] 1. By setting electrical connectors on the gas sensing unit, the interface unit, and the operational amplifier unit and designing a three-way electrical connector that can be plugged and unplugged to facilitate the plugging and unplugging of the electrical connectors, the gas sensing unit can be plugged and unplugged and sensors with different gas detection concentration detection functions can be quickly replaced. Compared with a single form of detection method, the switchable method of multiple gas detection is more conducive to on-site use and improves the detection effect of chemical gas concentration in the ambient air;

[0024] 2. By setting up a temperature and humidity detection unit, the gas detector with a detachable gas sensor can simultaneously monitor the temperature and humidity in the ambient air while detecting the chemical gas concentration, and perform temperature and humidity compensation for the data detected by the gas sensing unit, thereby improving the data analysis effect of the chemical gas in the ambient air;

[0025] 3. By setting a plurality of operational amplifiers in series in the operational amplifier unit, the gas detection signal and the temperature and humidity detection signal can be better amplified to improve the accuracy of the detection of chemical gas concentration in the ambient air;

[0026] 4. The utility model adopts a quick plug-in structure, which can replace and apply the gas sensor more quickly; the gas detector of the detachable gas sensor can be controlled by buttons, which is convenient for on-site operation; at the same time, an indicator light unit is provided, which can intuitively distinguish the on-site application failure of the gas detector of the detachable gas sensor and feedback the on-site detection status. The overall design is reasonable, the structure is compact, the application effect is good, and the practicability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Shown is a block diagram of a gas detector with a detachable gas sensor disclosed in the present utility model.

[0028] Figure 2 Shown is a circuit schematic diagram of the central processing unit of the gas detector of the detachable gas sensor disclosed in the utility model.

[0029] Figure 3 Shown is a circuit schematic diagram of a gas sensing unit, an interface unit, an operational amplifier unit, and a temperature and humidity detection unit of a gas detector of a detachable gas sensor disclosed in the utility model.

[0030] Figure 4 Shown is a circuit schematic diagram of the voltage stabilizing unit portion of the gas detector of the detachable gas sensor disclosed in the utility model.

[0031] Figure 5 Shown is a circuit schematic diagram of the indicator light unit of the gas detector of the detachable gas sensor disclosed in the utility model.

[0032] Figure 6Shown is a circuit schematic diagram of the relay unit portion of the gas detector of the detachable gas sensor disclosed in the utility model.

[0033] Figure 7 Shown is a circuit schematic diagram of the pump unit portion of the gas detector of the detachable gas sensor disclosed in the utility model.

[0034] Figure 8 Shown is a circuit schematic diagram of the storage unit portion of the gas detector of the detachable gas sensor disclosed in the utility model.

[0035] Fig. 9 Shown is a circuit schematic diagram of the key unit portion of the gas detector of the detachable gas sensor disclosed in the utility model.

[0036] Fig.10 Shown is a circuit schematic diagram of the Ethernet unit portion of the gas detector of the detachable gas sensor disclosed in the utility model.

[0037] Component number description

[0038] Central processing unit 1; gas sensor unit 2; interface unit 3; operational amplifier unit 4; analog-to-digital conversion unit 5; temperature and humidity detection unit 6; RTC unit 7; electrochemical sensor 8; operational amplifier 9; three-way electrical connector 10; voltage stabilizing unit 11; indicator light unit 12; light emitting diode 13; MOS switch element 14; relay unit 15; pump unit 16; storage unit 17; key unit 18; Ethernet unit 19. DETAILED DESCRIPTION

[0039] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0040] See also Figures 1 to 10 It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportion relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0041] See also Figure 1-10 The utility model provides a gas detector with a detachable gas sensor, including a central processing unit 1, a gas sensing unit 2, an interface unit 3, an operational amplifier unit 4, an analog-to-digital conversion unit 5, and a temperature and humidity detection unit 6; the central processing unit 1 adopts a main control chip U2, and an RTC unit 7 is connected to the main control chip U2 to check the function of the detector to provide time, date and font library.

[0042] The gas sensing unit 2 adopts at least one electrochemical sensor 8 for monitoring the chemical gas concentration in the ambient air; the interface unit 3 adopts an interface chip U1, and the electrochemical sensor 8 is connected to the interface chip U1; the operational amplifier unit 4 adopts at least two operational amplifiers 9 connected in series, and the reverse input end and the same input end of the operational amplifier 9 are connected to the interface chip U1, which are used to amplify the gas concentration detection signal; the multiple operational amplifiers 9 connected in series in the operational amplifier unit 4 can better amplify the gas detection signal and the temperature and humidity detection signal, so as to improve the accuracy of the detection of the chemical gas concentration in the ambient air.

[0043] The gas sensing unit 2, the interface unit 3, and the operational amplifier unit 4 are all provided with electrical connectors, and a pluggable three-way electrical connector 10 is provided between the gas sensing unit 2, the interface unit 3, and the operational amplifier unit 4; by providing electrical connectors on the gas sensing unit 2, the interface unit 3, and the operational amplifier unit 4 and designing a three-way electrical connector 10 that cooperates with the plugging and unplugging of the electrical connectors, the gas sensing unit 2 can be plugged in and out and sensors with different gas detection concentration detection functions can be quickly replaced. Compared with a single form of detection method, a method of switching between multiple gas detection methods is more conducive to on-site use and improves the detection effect of chemical gas concentration in ambient air.

[0044] A voltage stabilizing unit 11 is connected to the operational amplifier unit 4, and the voltage stabilizing unit 11 adopts a voltage stabilizer U12 for voltage stabilization during operational amplifier operation; the analog-to-digital conversion unit 5 adopts an analog-to-digital conversion chip U14, and the analog-to-digital conversion chip U14 is connected between the output end of the operational amplifier 9 and the main control chip U2, and is used to convert the detection information of the analog signal into a digital signal.

[0045] The temperature and humidity detection unit 6 uses a silicon diode D3 to monitor the temperature and humidity in the ambient air; the output end of the silicon diode D3 is connected to the interface chip U1; the gas detector of the detachable gas sensor can simultaneously monitor the temperature and humidity in the ambient air through the temperature and humidity detection unit 6 while detecting the chemical gas concentration, and perform temperature and humidity compensation for the data detected by the gas sensing unit 2, thereby improving the data analysis effect of the chemical gas in the ambient air.

[0046] The gas detector of the detachable gas sensor also includes an indicator light unit 12, which uses multiple light-emitting diodes, and multiple light-emitting diodes 13 are connected in parallel on the main control chip U2; a MOS switch element 14 is arranged between the single light-emitting diode 13 and the main control chip U2, and the base of the MOS switch element 14 is connected to the main control chip U2, the collector is connected to the output end of the light-emitting diode, and the emitter is grounded; a relay unit 15 is arranged between the indicator light unit 12 and the central processing unit 1, and the relay unit 15 uses a relay K1 for controlling the indicator light unit to light up; multiple light-emitting diodes 13 can respectively display different equipment application states, and the staff can intuitively distinguish the on-site application fault conditions of the gas detector of the detachable gas sensor and feedback the on-site detection conditions through the indicator light unit 12.

[0047] The central processing unit 1 is also connected to a pump unit 16, a storage unit 17, a button unit 18, and an Ethernet unit 19; the pump unit 16 uses a pump control board U7 to deliver ambient air to the gas sensor unit 2; specifically, the duty cycle of the pump control board U7 is regulated by the main control chip U2, so that the vibration generated by the pump and other structural parts generate a mutual flow input to the inside, thereby delivering the ambient air to the detection range of the electrochemical sensor 8; the storage unit 17 uses a memory U4 to store application information of the gas detector of the detachable gas sensor, including the device's own setting information, product information, alarm information, log information, etc.; the button unit 18 uses buttons including controls for different functions for human-computer interaction; the Ethernet unit 19 uses a network transformer L1 to provide a wired connection so that the gas detector of the detachable gas sensor has a network communication function.

[0048] In summary, the utility model adopts a quick plug-in structure, which can replace and apply the gas sensor more quickly; the gas detector of the detachable gas sensor can be controlled by buttons, which is convenient for on-site operation; at the same time, an indicator light unit is provided, which can intuitively distinguish the on-site application failure of the gas detector of the detachable gas sensor and feedback the on-site detection status. The overall design is reasonable, the structure is compact, the application effect is good, and the practicality is high. Therefore, the utility model effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0049] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A gas detector with a detachable gas sensor, characterized in that: include: Central processing unit, the central processing unit adopts a main control chip U2; A gas sensing unit, wherein the gas sensing unit uses at least one electrochemical sensor to monitor the concentration of chemical gases in the ambient air; An interface unit, wherein the interface unit uses an interface chip U1, and the electrochemical sensor is connected to the interface chip U1; An operational amplifier unit, wherein the operational amplifier unit uses at least two operational amplifiers connected in series, with the reverse input terminal of the operational amplifier connected to the interface chip U1 and the same input terminal connected to the interface chip U1, for amplifying the gas concentration detection signal; The analog-to-digital conversion unit adopts an analog-to-digital conversion chip U14, which is connected between the output end of the operational amplifier and the main control chip U2, and is used to convert the detection information of the analog signal into a digital signal; A temperature and humidity detection unit, wherein the temperature and humidity detection unit uses a silicon diode D3 to monitor the temperature and humidity in the ambient air; the output end of the silicon diode D3 is connected to the interface chip U1; The gas sensing unit, the interface unit and the operational amplifier unit are all provided with electrical connectors, and a pluggable three-way electrical connector is provided between the gas sensing unit, the interface unit and the operational amplifier unit.

2. The gas detector with a detachable gas sensor according to claim 1, characterized in that: The gas detector of the detachable gas sensor further includes an indicator light unit. The indicator light unit uses a plurality of light emitting diodes. The plurality of light emitting diodes are connected in parallel on the main control chip U2.

3. The gas detector with a detachable gas sensor according to claim 2, characterized in that: A MOS switch is provided between the single light emitting diode and the main control chip U2. The base of the MOS switch is connected to the main control chip U2, the collector is connected to the output end of the light emitting diode, and the emitter is grounded.

4. The gas detector with a detachable gas sensor according to claim 2, characterized in that: A relay unit is provided between the indicator light unit and the central processing unit. The relay unit uses a relay K1 to control the indicator light unit to light up.

5. The gas detector with a detachable gas sensor according to claim 1, characterized in that: The operational amplifier unit is connected to a voltage stabilizing unit, and the voltage stabilizing unit uses a voltage stabilizer U12 for voltage stabilization during operational amplifier operation.

6. The gas detector with a detachable gas sensor according to claim 1, characterized in that: The central processing unit is also connected to a pump unit, a storage unit, a key unit, and an Ethernet unit. The pump unit uses a pump control board U7 to deliver ambient air to the gas sensor unit; The storage unit uses a memory U4 for storing application information of the gas detector of the detachable gas sensor; The key unit includes keys for controlling different functions for human-computer interaction; The Ethernet unit uses a network transformer L1 to provide a wired connection so that the gas detector with a detachable gas sensor has a network communication function.

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