CN112305174A - a gas detector - Google Patents
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- CN112305174A CN112305174A CN202011352157.2A CN202011352157A CN112305174A CN 112305174 A CN112305174 A CN 112305174A CN 202011352157 A CN202011352157 A CN 202011352157A CN 112305174 A CN112305174 A CN 112305174A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
- G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display using a threshold to release an alarm or displaying means
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
- G08B21/14—Toxic gas alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
- G08B21/16—Combustible gas alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to two or more of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to two or more of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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Abstract
本发明提供的一种气体探测器，应用于气体检测技术领域，该气体探测器包括传感器模块、主控制器、无线传输模块，以及有线传输模块，传感器模块检测气体浓度并输出与气体浓度对应的数字量信号，主控制器基于所得数字量信号计算得到气体浓度值；无线传输模块和有线传输模块分别与主控制器相连，无线传输模块以预设无线传输方式传输气体浓度值，同时，有线传输模块以预设有线传输方式传输气体浓度值。本发明提供的气体探测器，在现有技术采用的有线传输的基础上，通过无线传输模块实现气体浓度值的无线传输，突破了有线传输模式对传输距离的限制，从而使得可以在以中控室为中心的更大的范围内设置气体探测器，满足实际应用的需求。
A gas detector provided by the present invention is applied to the technical field of gas detection. The gas detector includes a sensor module, a main controller, a wireless transmission module, and a wired transmission module. The sensor module detects gas concentration and outputs a gas concentration corresponding to the gas concentration. Digital signal, the main controller calculates the gas concentration value based on the obtained digital signal; the wireless transmission module and the wired transmission module are respectively connected to the main controller, the wireless transmission module transmits the gas concentration value in a preset wireless transmission mode, and at the same time, the wired transmission The module transmits the gas concentration value in a preset wired transmission mode. The gas detector provided by the present invention realizes the wireless transmission of the gas concentration value through the wireless transmission module on the basis of the wired transmission adopted in the prior art, which breaks through the limitation of the transmission distance by the wired transmission mode, so that it can be used in the central control room. Set up gas detectors in a larger range for the center to meet the needs of practical applications.
Description
Technical Field
The invention belongs to the technical field of gas detection, and particularly relates to a gas detector.
Background
In the daily production of departments such as petroleum, chemical industry, rubber, leather, metallurgy, environmental protection, fire control, municipal administration and the like, the leakage or seepage of toxic and harmful gas and flammable and explosive gas can be avoided, so that the toxic, harmful, flammable and explosive gas can exist in the working environment where a worker is located more or less, the environment can bring great damage to the health of the worker, and the life safety of the worker is threatened.
In order to avoid the occurrence of poisoning or explosion accidents, the gas concentration of dangerous gas in the working environment is monitored, and a gas detector is required to be arranged in the scene. The existing gas detector is mainly composed of a gas sensor, a signal processor, a display unit and a transmission unit, wherein the gas sensor converts the gas concentration of hazardous gas into an electric signal, the signal processor calculates a corresponding concentration value based on the electric signal, and when the concentration of the hazardous gas in the air exceeds the standard, audible and visual alarm is carried out. The obtained concentration value can be displayed through the display unit, and meanwhile, the transmission unit needs to transmit the obtained concentration value to the central control room.
However, most of the transmission units in the existing gas detectors adopt a wired transmission mode such as a three-wire system 4-20mA or a four-wire system RS485, and the concentration value of the gas needs to be converted into a corresponding analog signal quantity during transmission, and because the analog signal has inevitable attenuation during transmission, the effective transmission distance of the wired transmission mode is limited, and the gas detector cannot be arranged in a range farther away from a central control room, which is difficult to meet the requirements of practical application.
Disclosure of Invention
In view of this, an object of the present invention is to provide a gas detector, which can transmit a gas concentration value according to a preset wireless transmission manner, and meet the actual application requirement of setting the gas detector in a wider range, and the specific scheme is as follows:
the invention provides a gas detector, comprising: a sensor module, a main controller, a wireless transmission module, and a wired transmission module, wherein,
the sensor module detects the gas concentration and outputs a digital quantity signal corresponding to the gas concentration;
the main controller is connected with the sensor module and calculates a gas concentration value based on the digital quantity signal;
the wireless transmission module is connected with the main controller and transmits the gas concentration value in a preset wireless transmission mode;
and the wired transmission module is connected with the main controller and transmits the gas concentration value in a preset wired transmission mode.
Optionally, the sensor module is integrated with a gas sensor and a signal processing module, wherein,
the gas sensor detects the gas concentration and outputs an analog quantity signal corresponding to the gas concentration;
the signal processing module is detachably connected with the main controller and converts the analog quantity signal into a digital quantity signal.
Optionally, the gas detector provided by the present invention further includes: an alarm module, wherein,
the main controller is connected with the alarm module;
the main controller outputs an alarm instruction when the gas concentration value is greater than a preset concentration threshold value, wherein the alarm instruction comprises the gas concentration value;
and the alarm module broadcasts the gas concentration value according to the alarm instruction and presets danger avoiding prompt information.
Optionally, the alarm module is provided with an alarm lamp, and the alarm module is further configured to turn on the alarm lamp according to the alarm instruction.
Optionally, the wireless transmission module includes a transmission controller and a communication module, wherein,
the transmission controller is respectively connected with the main controller and the communication module;
and the transmission controller receives the gas concentration value and controls the communication module to transmit the gas concentration value in a preset wireless transmission mode.
Optionally, the wired transmission module includes a digital-to-analog conversion module, wherein,
and the digital-to-analog conversion module is used for converting the gas concentration value into a corresponding analog quantity for transmission according to a preset wired transmission mode.
Optionally, the gas detector provided by the present invention further includes: a display module, wherein,
the display module is connected with the main controller and used for receiving and displaying the gas concentration value.
Optionally, the gas detector provided by the present invention further includes: a power module, wherein,
the power module is used for providing working power for the sensor module, the main controller, the wireless transmission module, the wired transmission module, the alarm module and the display module.
Optionally, the gas detector provided by the present invention further includes: a monitoring module, wherein,
the monitoring module is connected with the power supply module and used for monitoring the output voltage of the power supply module.
Optionally, the gas detector provided by the present invention further includes: a module is provided, wherein,
the setting module is connected with the main controller;
the setting module is used for inputting a preset setting instruction to the main controller.
The gas detector provided by the invention comprises a sensor module, a main controller, a wireless transmission module and a wired transmission module, wherein the sensor module detects the gas concentration and outputs a digital quantity signal corresponding to the gas concentration, and the main controller calculates the gas concentration value based on the obtained digital quantity signal; the wireless transmission module and the wired transmission module are respectively connected with the main controller, the wireless transmission module transmits the gas concentration value in a preset wireless transmission mode, and meanwhile, the wired transmission module transmits the gas concentration value in a preset wired transmission mode. The gas detector provided by the invention realizes wireless transmission of the gas concentration value through the wireless transmission module on the basis of wired transmission adopted in the prior art, breaks through the limitation of a wired transmission mode on the transmission distance, so that the gas detector can be arranged in a larger range taking a central control room as a center, and the requirements of practical application are met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a block diagram of a gas detector according to an embodiment of the present invention;
fig. 2 is a circuit topology diagram of a wired transmission module according to an embodiment of the present invention;
FIG. 3 is a block diagram of another gas detector provided in an embodiment of the present invention;
FIG. 4a is a first partial circuit topology diagram of a sensor module provided by an embodiment of the present invention;
FIG. 4b is a second partial circuit topology diagram of a sensor module provided by an embodiment of the present invention;
FIG. 4c is a third partial circuit topology diagram of a sensor module provided by an embodiment of the present invention;
FIG. 5 is a block diagram of another gas detector according to an embodiment of the present invention;
FIG. 6 is a circuit topology diagram of an alarm device provided by an embodiment of the present invention;
FIG. 7 is a block diagram of another gas detector according to an embodiment of the present invention;
fig. 8 is a block diagram of another gas detector according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Optionally, referring to fig. 1, fig. 1 is a block diagram of a gas detector provided in an embodiment of the present invention, where the gas detector provided in this embodiment includes: a sensor module 10, a main controller 20, a wireless transmission module 30, and a wired transmission module 40, wherein,
the sensor module 10 can detect the gas concentration of the hazardous gas to be detected and output a digital quantity signal corresponding to the gas concentration to the main controller 20. The main controller 20 is connected to the sensor module 10, receives the digital signal from the sensor module 10, and calculates a corresponding gas concentration value based on the digital signal.
It should be noted that, for the specific implementation process of calculating the gas concentration value based on the obtained digital quantity signal by the main controller 20, reference may be made to the prior art, and any method capable of implementing this calculation process in the prior art is optional, and the present invention is not limited to this.
Further, the wired transmission module 30 and the wireless transmission module 40 are respectively connected to the main controller 20, and receive the gas concentration value output by the main controller 20. For the wireless transmission module 40, after the gas concentration value is obtained, the gas concentration value is transmitted to an upper control system, such as a central control room, in a preset wireless transmission manner. Accordingly, the wired transmission module 30 transmits the gas concentration value to other control systems that need to receive the gas concentration value in a preset wired transmission manner, which may be a central control room.
Optionally, the wireless transmission module may be implemented based on a 4G wireless communication technology, and specifically, the wireless communication module may include a transmission controller and a communication module. In practical application, the transmission controller receives the gas concentration value sent by the main controller through a preset communication line, and further controls the communication module to transmit the gas concentration value in a preset wireless transmission mode, for example, the obtained gas concentration value is transmitted in a 4G wireless communication mode. Compared with the prior art, the 4G wireless communication is adopted to illustrate the gas concentration value, so that the stability, reliability and effectiveness of transmission can be effectively guaranteed, and the wireless transmission mode is adopted, construction wiring is not needed, and labor and construction cost are directly saved.
Optionally, the wired transmission module may further include a digital-to-analog conversion module, and the gas concentration value sent by the main controller is converted into a corresponding analog quantity by the digital-to-analog conversion module, and then is transmitted in a preset wired transmission manner. In practical application, the wired transmission mode can be realized by adopting a three-wire system 4-20mA mode or a four-wire system RS485 mode and the like.
For example, referring to fig. 2, fig. 2 is a circuit topology diagram of a wired transmission module according to an embodiment of the present invention, where the wired transmission module can implement 4-20mA wired transmission. It should be noted that any method capable of using wired transmission is optional, and the method for transmitting the gas concentration value is also within the protection scope of the present invention without departing from the scope of the core idea of the present invention.
It is conceivable that, for specific applications, wireless transmission or wired transmission is selected, and users can flexibly select the wireless transmission or the wired transmission according to their own needs.
In summary, the gas detector provided in the embodiment of the present invention, based on the wired transmission, is additionally provided with the wireless transmission module, and can realize the wireless transmission of the gas concentration value through the wireless transmission module, thereby breaking through the limitation of the wired transmission mode on the transmission distance, so that the gas detector can be arranged in a wider range with the central control room as a center, and meeting the requirements of practical applications.
Optionally, referring to fig. 3, fig. 3 is a block diagram of another gas detector provided in the embodiment of the present invention, and on the basis of the embodiment shown in fig. 1, the embodiment of the present invention provides an alternative configuration of a sensor module, where the sensor module 10 is integrated with a gas sensor 110 and a signal processing circuit 120.
It should be emphasized that, in the present embodiment, the sensor module 10 adopts an integrated intelligent sensor module, that is, the gas sensor 110 and the signal processing circuit 120 are integrally disposed, the gas sensor 110 detects the gas concentration of the gas to be detected and outputs an analog quantity signal corresponding to the gas concentration, the input end of the signal processing module 120 is connected to the output end of the gas sensor 110, the analog quantity signal obtained after receiving the analog quantity signal of the gas sensor 110 is converted into a digital quantity signal, further, the output end of the signal processing module 120 is detachably connected to the main controller 20, and the digital quantity signal obtained after conversion is sent to the main controller 20.
Alternatively, for alternative constructions of the sensor module 10, reference may be made to fig. 4 a-4 c. Specifically, the signal processing module 120 of the sensor module 10 can be roughly divided into a primary amplifying circuit, a post-amplifying circuit, and a signal processor, wherein fig. 4a shows the connection between the gas sensor 110 and the primary amplifying circuit, fig. 4b shows the circuit topology of the post-amplifying circuit, and the connection terminal SOUT in fig. 4a and the connection terminal SOUT in fig. 4b are correspondingly connected in practical application. Further, fig. 4c is a schematic diagram of the signal processor and the reset circuit, and the connection terminal AD0 in fig. 4b and the connection terminal AD0 in fig. 4c are correspondingly connected in practical applications.
Based on the above, it can be seen that the sensor module adopted in this embodiment is provided with an independent signal processor (i.e., the sensor single chip shown in fig. 4 c), and can automatically complete the conversion from the analog quantity signal to the digital quantity signal without depending on the main controller of the gas detector itself, so that plug and play can be supported, and the gas detector is maintenance-free and calibration-free, does not need to be powered off on site, and can bring great timeliness to maintenance work.
Optionally, referring to fig. 5, fig. 5 is a block diagram of a structure of another gas detector provided in the embodiment of the present invention, and on the basis of the embodiment shown in fig. 3, the gas detector provided in this embodiment further includes: an alarm module 50.
Specifically, the main controller 20 is connected to the alarm module 50, and after the main controller 20 calculates the gas concentration value, the obtained gas concentration value is compared with a preset concentration threshold value, and when the obtained gas concentration value is greater than the preset concentration threshold value, an alarm instruction including the gas concentration value is output to the alarm module 50. The alarm module 50 broadcasts the gas concentration value according to the alarm instruction and presets danger avoiding prompt information.
Optionally, the alarm module 50 is further provided with an alarm lamp, and the alarm lamp is turned on according to the alarm instruction to realize sound-light alarm. Referring to fig. 6, fig. 6 is a circuit topology diagram of an alarm device provided in an embodiment of the present invention, and of course, the embodiment shown in fig. 6 is only an alternative implementation and is not used as the only limitation of the alarm device in the present invention.
Optionally, the alarm module may further include an external interface, for example, a relay for external connection is provided, and the external interface provides an alarm signal to other alarm devices or the linkage extension set.
It should be noted that, in the alarm device provided in the gas detector in the prior art, the sound alarm is only a simple alarm prompt tone, the field personnel cannot obtain the current specific gas concentration value, and the field personnel do not know what kind of risk avoiding measures to be taken when the field personnel are in a dangerous situation due to the deficiency of safety knowledge or education and training. Through the gas detector provided by the embodiment of the invention, the alarm device not only can definitely broadcast the real-time gas concentration value, but also can broadcast the corresponding preset danger avoiding prompt information to guide field personnel to avoid danger in time, and can provide clear and definite danger avoiding instructions to strive for golden time for the field personnel to adopt safety measures, thereby greatly reducing the probability of danger.
Optionally, referring to fig. 7, fig. 7 is a block diagram of a structure of another gas detector provided in the embodiment of the present invention, and on the basis of the embodiment shown in fig. 6, the gas detector provided in this embodiment further includes: a display module 60 and a setup module 70.
The display module 60 is connected to the main controller 20, and receives and displays the gas concentration value sent by the main controller 20. Optionally, the display module 60 may be implemented by using an LED circuit, or may be implemented by using other display devices, and any implementation manner capable of displaying the gas concentration value sent by the main controller 20 is optional, and also falls within the protection scope of the present invention.
The setting module 70 is connected to the main controller 20, and the setting module 70 is configured to input a preset setting instruction to the main controller 20, for example, the preset concentration threshold may be set, and the alarm volume of the alarm module and the preset risk avoidance information may be adjusted.
Optionally, referring to fig. 8, fig. 8 is a block diagram of another gas detector provided in the embodiment of the present invention, and on the basis of the embodiment shown in fig. 7, the gas detector provided in this embodiment further includes: a power module 80 and a monitoring module 90.
The power module 80 provides operating power to the sensor module 10, the main controller 20, the wireless transmission module 40, the wired transmission module 30, the alarm module 50, and the display module 60, respectively. Specifically, in practical applications, the operating voltages of the components included in the gas detector may be different, so that the power module 80 may be further specifically divided into a main power supply and a plurality of regulated power supplies, wherein the main power supply is configured to convert a power frequency power supply into a direct current power supply, the input end of each regulated power supply is connected to the output end of the main power supply, and the output end of each regulated power supply is connected to each corresponding component and outputs an operating voltage meeting the operating requirements of the corresponding component.
Further, in order to prevent the power module voltage fluctuation from affecting the accuracy of the gas concentration value, the present embodiment provides a monitoring module 90. The monitoring module 90 is connected to the power module 80 for monitoring the output voltage of the power module 80. The monitoring module 90 may be implemented based on the prior art, for example, a watchdog circuit may be specifically selected, and the present invention is not limited thereto.
Optionally, the gas detector provided by any one of the above embodiments may adopt an integrated explosion-proof design, does not need an external device, and has high safety.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
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Application publication date: 20210202 |