CN217304893U

CN217304893U - Combustible gas detector integrating indicator light and digital display

Info

Publication number: CN217304893U
Application number: CN202121959174.2U
Authority: CN
Inventors: 宿赛龙; 石军辉; 王静; 崔五伟; 孟红霞
Original assignee: Hebei Zehong Technology Co ltd
Current assignee: Hebei Zehong Technology Co ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-08-26
Anticipated expiration: 2031-08-19

Abstract

The application relates to a combustible gas detector integrating an indicator light and a digital display, which comprises a shell, a transparent cover plate, a display screen and a detection and control circuit, wherein the transparent cover plate is hermetically and fixedly arranged on the shell; the display screen comprises a nixie tube and a warning lamp, and the nixie tube and the warning lamp are integrated into a whole; the detection and control circuit comprises: the detection unit is arranged outside the shell and used for detecting the concentration of combustible gas and/or harmful gas and outputting an analog signal; the analog-to-digital conversion unit is connected to the signal output end of the detection unit and used for receiving the analog signal, converting the analog signal into a digital signal and outputting the digital signal to the information processing unit; and the information processing unit is connected to the analog-to-digital conversion unit, analyzes the received digital signal and outputs a control signal to the display screen. The application has the effects of reducing the production cost and improving the use stability.

Description

Combustible gas detector integrating indicator light and digital display

Technical Field

The application relates to the field of gas detection equipment, in particular to a combustible gas detector integrating an indicator lamp and a digital display.

Background

The gas detector is a detector for detecting the concentration of gas, the core original component of the gas detector is a gas sensor, the gas detector is installed in a place where gas leakage is possible, when the concentration of the combustible gas in the air exceeds a set value, the detector can be triggered to alarm and send out sound and light alarm signals to the outside, if an alarm host and an alarm receiving center are connected, the gas detector can be networked to alarm, meanwhile, exhaust equipment can be automatically started, a gas pipeline valve can be automatically closed, and the like, so that the safety of life and property is ensured.

The design scheme of traditional detector is that display screen and warning indicator lamp separation are arranged to separately independent control, not only the design is complicated, has comparatively complicated production step and higher manufacturing cost, still has higher equipment failure rate, and the use experience still remains to be improved.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application provides a combustible gas detector integrating an indicator light and a digital display.

The application provides a collect pilot lamp and digital display integrative combustible gas detector adopts following technical scheme:

a combustible gas detector integrating an indicator light and a digital display comprises a shell, a transparent cover plate, a display screen and a detection and control circuit, wherein the transparent cover plate is fixedly arranged on the shell in a sealing mode, the display screen is arranged on the shell and faces the transparent cover plate, and the detection and control circuit is arranged in the shell and is electrically connected with the display screen;

the display screen comprises a nixie tube and a warning lamp, and the nixie tube and the warning lamp are integrated into a whole;

the detection and control circuit comprises:

the detection unit is arranged outside the shell and used for detecting the concentration of combustible gas and/or harmful gas and outputting an analog signal;

the analog-to-digital conversion unit is connected to the signal output end of the detection unit and used for receiving the analog signal, converting the analog signal into a digital signal and outputting the digital signal to the information processing unit; and

and the information processing unit is connected to the analog-to-digital conversion unit, analyzes the received digital signal and outputs a control signal to the display screen.

Optionally, the detection and control circuit further includes a communication unit, connected to the signal output end of the information processing unit, and configured to remotely output an analysis result of the information processing unit.

Optionally, the housing is a cast aluminum housing; the transparent cover plate is made of explosion-proof glass.

Optionally, the warning light includes operation indication, alarm indication and fault indication, and the color of each warning light is different when sending out the warning signal.

Optionally, the alarm indication includes a high report indication and a low report indication.

Optionally, the detection unit includes a gas sensor disposed outside the housing, and a signal output end of the gas sensor is connected to an input end of the analog-to-digital conversion unit.

Optionally, the display screen is further integrated with an encoder, and the encoder is electrically connected with the warning light and the nixie tube and is used for converting the digital signal into a binary signal which can be recognized by the debugging device.

Optionally, the encoder is further connected with an infrared sensor, and a signal output end of the infrared sensor is connected to a switch of the encoder and used for connecting or disconnecting the encoder to the display screen; the detector also comprises a remote controller matched with the infrared sensor.

The beneficial technical effect of this application does:

1. the warning light and the nixie tube are integrated on the same display screen, so that the number of the open holes of the shell can be reduced, production steps of related enterprises can be reduced, manufacturing cost can be reduced, a user can visually see detection results and related data through the display screen, and good use experience is achieved;

2. the warning light and the nixie tube are integrated on the same display screen, so that the size of the equipment is smaller, a hardware circuit and an external structure are simpler, the service life is longer, the maintenance frequency is lower, and the performance is more stable.

Drawings

Fig. 1 is a schematic overall structure diagram provided in an embodiment of the present application.

Fig. 2 is a structural diagram of a distribution of light emitting diodes of a display screen according to an embodiment of the present application.

Fig. 3 is a connection diagram of an internal circuit of a display screen chip according to an embodiment of the present disclosure.

Fig. 4 is a system block diagram of a detection and control circuit according to an embodiment of the present application.

Fig. 5 is a partial circuit diagram of an information processing unit connected to a display screen according to an embodiment of the present application.

Reference numerals: 1. a housing; 2. a transparent cover plate; 3. a display screen; 31. a nixie tube; 32. a warning light; 33. an encoder; 41. a detection unit; 42. an analog-to-digital conversion unit; 43. an information processing unit; 44. a communication unit; 45. a signal generating unit; 51. an infrared sensor; 52. and a remote controller.

Detailed Description

The technical solutions in the present application will be described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses a combustible gas detector integrating indicator light and digital display. The display device comprises a shell 1, a transparent cover plate 2 hermetically and fixedly arranged on the shell 1, a display screen 3 arranged on the shell 1 and facing the transparent cover plate 2, and a detection and control circuit arranged in the shell 1 and electrically connected with the display screen 3.

Referring to fig. 1, a housing 1 is made of cast aluminum and is formed in a hollow structure with a cable hole and an observation window. The shell 1 of the detector is firm and durable, low in price, and good in corrosion resistance and stability, so that the shell 1 of the detector is low in manufacturing cost. Transparent cover 2 is including being annular solid fixed ring and setting firmly the transparent plate in the middle of solid fixed ring, gu fixed ring's material is the same with casing 1's material, the transparent plate can be explosion-proof glass, can be to the electron device in the casing 1 with to personnel's guard action on every side, gu fixed ring threaded connection is on casing 1 or the bolt fastening is on casing 1 to form to shelter from casing 1's observation window, so that observe the display screen 3 in the casing 1.

Referring to fig. 1 and 2, the display screen 3 includes a nixie tube 31 and a warning light 32, and the nixie tube 31 and the warning light 32 are integrated into a whole. The nixie tube 31 is used to display the concentration of the combustible gas or the lowest limit of explosion of the combustible gas. The warning light 32 is used for emitting light signals with different colors to remind related workers. The warning light 32 includes operation instruction, alarm instruction and fault indication, and the colour of each warning light 32 when sending alarm signal all is different, and for example the colour of operation pilot lamp is green, and the colour of fault indication lamp is yellow, and the colour of alarm indication lamp is red, and the staff only sees the colour of warning light 32 and can know the testing result of surrounding air.

Further, the warning light 32 includes a high alarm and a low alarm, that is, when the concentration of the combustible gas in the detected air is below a set first threshold range, the warning indicator light is in an off state; when the concentration of the combustible gas is in the range between the set first threshold value and the second threshold value, the fact that certain combustible gas exists in the air is indicated, and the low-alarm indicating lamp is turned on; and when the concentration of the combustible gas exceeds a second threshold value, the concentration of the combustible gas in the air is high, the air has extremely high danger, and the high-alarm indicator lamp is on.

The display screen 3 can be a ZH21-display chip, referring to fig. 2 and fig. 3, 46 light emitting diodes are arranged in the display screen 3, the display screen corresponds to different areas of the display screen 3, the display chip has 15 pins, wherein the pins COM 1-6 are connected to anodes of all columns of light emitting diodes, the pins SEG 1-8 are connected to cathodes of all rows of light emitting diodes, and the light emitting diodes in the corresponding areas of the display screen 3 can be turned on or off according to the high and low levels of the received electrical signals of all pins, so that the indicating function is realized.

An icon indicator light, such as a 4-C4 shown in fig. 2, is provided on the top of the nixie tube 31, and may be any icon capable of indicating the operating state of the equipment and matching with the warning light 32, for example, the icon may be in the shape of a "wrench", and when the icon is illuminated, the failure indicator light in the warning light 32 is on, and when the icon is illuminated, the equipment is in a failure or inspection state. The unit indicator light is arranged at the lower part of the nixie tube 31 and used for indicating the type of the detection data displayed by the nixie tube 31, such as D4-G4 shown in FIG. 2, the unit indicator light comprises units of mu mol/mol,% VOL,% ELE and the like which can arbitrarily indicate the type of the detection data, for example, when% VOL is bright, the data displayed by the nixie tube 31 is the proportion of combustible gas in air.

In the area of the warning lamp 32, when any one or more light-emitting diodes in each area are turned on, the indicator lamp in the area is in a turned-on state, for example, when the area is in a low-alarm state, pins COM6 on a chip of the display screen 3 are in a high level, and any one or more pins SEG 1-SEG 4 are in a low level, so that the area in the warning lamp emits light, and the low-alarm indicating function is realized; for example, when the device is in a normal working state, the COM5 pin is at a high level, and any pin of the SEG 5-8 is at a low level, so that the operation indication area in the warning light 32 is lighted up, and an operation indication function is given; meanwhile, the nixie tube 31 can display corresponding numbers according to the difference of the electrical levels of the COM 1-3 pins and the SEG 1-8 pins so as to display the content of the combustible gas in the detected air.

Referring to fig. 4, the detection and control circuit includes a detection unit 41, an analog-to-digital conversion unit 42, and an information processing unit 43. The detection unit 41 is fixedly arranged outside the shell 1, and is used for detecting the concentration of combustible gas and/or harmful gas in the surrounding environment of the shell 1 and outputting an analog signal according to the concentration; the analog-to-digital conversion unit 42 and the information processing unit 43 are both arranged inside the housing 1, and the analog-to-digital conversion unit 42 is electrically connected with the output end of the detection unit 41 and is used for converting an analog signal into a digital signal and outputting the digital signal; the information processing unit 43 is connected to the signal output end of the analog-to-digital conversion unit 42, and outputs a control signal to the display screen 3 after analyzing the received digital signal.

Specifically, the detecting unit 41 may be any type of gas sensor, for example, a catalytic combustion type sensor, and measures the concentration of the combustible gas by using a resistance change of a platinum wire heated by refractory metal, when the sensor collects the combustible gas, an oxidation reaction (flameless combustion) is caused on the surface of the platinum wire, the temperature of the platinum wire is increased by the heat generated by the oxidation reaction, and the resistivity of the platinum wire changes to detect the content of the combustible gas in the air. The gas sensor may be an infrared optical sensor, and detects the hydrocarbon combustible gas in the field environment by using the absorption principle of the infrared sensor 51 through the infrared light source.

The analog-to-digital conversion unit 42 includes an analog-to-digital converter (a/D converter), for example, a chip of AD7810 type, which can convert the received analog signal into a digital signal and output the digital signal, so as to enable the signal processing unit to process the acquired signal.

The signal processing unit comprises a processor, the processor can be a TM1637 chip, as shown in FIG. 5, pins KS 1-KS 8 of the processor are respectively connected with pins SEG 1-SEG 8 of the display screen 3, pins GRID 1-6 of the processor are respectively connected with pins COM 1-6 of the display, and the display chip can present different light-emitting areas according to the high and low levels of received electric signals, so that different indication signals can be sent out.

The display screen 3 and the alarm indication function are combined together, so that the production steps of the detector can be reduced, the production process is simplified, the failure rate of equipment is reduced, the production cost and the maintenance cost can be reduced, and the running reliability of the equipment is improved.

Further, the detection and control circuit further includes a communication unit 44 and a signal generation unit 45, referring to fig. 4, the communication unit 44 is connected to the signal output end of the information processing unit 43, and is used for remotely outputting the analysis result of the information processing unit 43. The communication unit 44 is arranged inside the shell 1, and CAN be in CAN communication or RS485 communication; the signal generating unit 45 is connected to the control output end of the information processing unit 43 and used for outputting an analog signal of 4-20 mA, and a cable connecting the communication unit 44 and the signal generating unit 45 can be led out through a cable hole of the shell 1 and connected to related remote monitoring equipment and used for sending a detection result and the analog signal to other related equipment so as to facilitate remote viewing and management.

Further, an encoder 33 is integrated on the display screen 3, the encoder 33 is connected with the display screen 3 and is used for connecting with an external debugging device and converting the digital signal into a binary signal which can be recognized by the debugging device; the encoder 33 is electrically connected with an infrared sensor 51 and matched with an independent remote controller 52, the remote controller 52 is used for sending a signal to the infrared sensor 51, and the signal output end of the infrared sensor 51 is connected to a switch of the encoder 33 and used for enabling the encoder 33 to be connected with or cut off the display screen 3. After the encoder 33 is connected with the display screen 3, each light-emitting diode of the display screen 3 can be detected and debugged by an external debugging device, and the debugging device can be a debugging device such as an upper computer or a single chip microcomputer, so that the phenomenon that the light-emitting diode in the display screen 3 cannot be lightened after the light-emitting diode fails can be prevented.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A combustible gas detector integrating an indicator light and a digital display is characterized by comprising a shell (1), a transparent cover plate (2) hermetically and fixedly arranged on the shell (1), a display screen (3) arranged on the shell (1) and facing the transparent cover plate (2), and a detection and control circuit arranged in the shell (1) and electrically connected with the display screen (3);

the display screen (3) comprises a nixie tube (31) and a warning lamp (32), and the nixie tube (31) and the warning lamp (32) are integrated into a whole;

the detection and control circuit comprises:

the detection unit (41) is arranged outside the shell (1) and used for detecting the concentration of combustible gas and/or harmful gas and outputting an analog signal;

the analog-to-digital conversion unit (42) is connected to the signal output end of the detection unit (41) and is used for receiving an analog signal, converting the analog signal into a digital signal and outputting the digital signal to the information processing unit (43); and

and the information processing unit (43) is connected to the analog-to-digital conversion unit (42), analyzes the received digital signal and outputs a control signal to the display screen (3).

2. The combustible gas detector integrating the indicator light and the digital display as claimed in claim 1, wherein: the detection and control circuit further comprises a communication unit (44) which is connected to the signal output end of the information processing unit (43) and is used for remotely outputting the analysis result of the information processing unit (43).

3. The combustible gas detector integrating the indicator light and the digital display as claimed in claim 1, wherein: the shell (1) is a cast aluminum shell (1); the transparent cover plate (2) is made of explosion-proof glass.

4. The combustible gas detector integrating the indicator light and the digital display as claimed in claim 1, wherein: the warning light (32) comprises an operation indication, an alarm indication and a fault indication, and the color of the warning light (32) is different when the warning signal is sent.

5. The combustible gas detector integrating the indicator light and the digital display as claimed in claim 4, wherein: the alarm indication comprises a high report indication and a low report indication.

6. The combustible gas detector integrating the indicator light and the digital display as claimed in claim 1, wherein: the detection unit (41) comprises a gas sensor which is arranged outside the shell (1), and the signal output end of the gas sensor is connected to the input end of the analog-to-digital conversion unit (42).

7. The combustible gas detector integrating the indicator light and the digital display as claimed in claim 1, wherein: the display screen (3) is further integrated with an encoder (33), and the encoder (33) is electrically connected with the warning lamp (32) and the nixie tube (31) and used for converting the digital signals into binary signals which can be recognized by the debugging device.

8. The combustible gas detector integrating the indicator light and the digital display as claimed in claim 7, wherein: the encoder (33) is also connected with an infrared sensor (51), and the signal output end of the infrared sensor (51) is connected to a switch of the encoder (33) and used for connecting or disconnecting the encoder (33) with the display screen (3); the detector also comprises a remote controller (52) matched with the infrared sensor (51).