CN108760978A - Gas-detecting device and system - Google Patents
Gas-detecting device and system Download PDFInfo
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- CN108760978A CN108760978A CN201810364397.0A CN201810364397A CN108760978A CN 108760978 A CN108760978 A CN 108760978A CN 201810364397 A CN201810364397 A CN 201810364397A CN 108760978 A CN108760978 A CN 108760978A
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Abstract
The present invention provides a kind of gas-detecting device and systems, are related to the technical field of gas detection, which includes：Comparator, and the signal detector, relay and the alarm that are connect with comparator；Signal detector is used to detect the concentration parameter of designated gas in the device local environment, exports electric signal corresponding with concentration parameter, and electric signal is sent to comparator；Comparator is for receiving electric signal, when electric signal is higher than reference signal, sends the first trigger signal to relay, trigger relay cuts off the current supply circuit where controlled component；And the second trigger signal is sent to alarm, triggering alarm carries out alarm.Gas-detecting device provided by the invention and system, detection process realize that scheme is simply and readily realized by comparing device, simultaneously, comparator is not easy to be influenced by environmental factor, improves the stability and reliability of gas detection process, it helps improve the Experience Degree of user.
Description
Technical field
The present invention relates to the technical fields of gas detection, more particularly, to a kind of gas-detecting device and system.
Background technology
Kitchen appliance industry development is rapid at present, and combustion gas uses also very universal, gas heater, gas-cooker and smoke exhaust ventilator
Universal also very wide, gas leakage accident happens occasionally.To ensure the person and property safety of user, occur that there is preventing gas
The various devices of leakage function.
In general, the various devices with preventing gas leakage function all include preventing gas leak detection module, the prior art
In, preventing gas leak detection module uses microcontroller to be used as detection core devices mostly, not only of high cost, and core devices are easy
It is influenced by environmental factor, causes the stability of gas detection poor, reduce reliability and the user of preventing gas leak detection
Experience Degree.
The relatively low technical problem of Experience Degree of reliability and user for above-mentioned gas detection not yet proposes have at present
The solution of effect.
Invention content
In view of this, the purpose of the present invention is to provide a kind of gas-detecting device and system, examined with alleviating existing gas
The reliability of survey and the relatively low technical problem of the Experience Degree of user.
In a first aspect, an embodiment of the present invention provides a kind of gas-detecting device, which includes：Comparator, Yi Jiyu
Signal detector, relay and the alarm of comparator connection, wherein relay is connect with controlled component；Signal detector
Including gas sensor assemblies, the concentration parameter for detecting designated gas in the device local environment, output and concentration parameter
Corresponding electric signal, and electric signal is sent to comparator；Comparator arrangement has reference cell, reference cell to be previously provided with base
Calibration signal；Comparator is for receiving electric signal, and when electric signal is higher than reference signal, the first trigger signal is sent to relay,
Trigger relay cuts off the current supply circuit where controlled component；And send the second trigger signal, triggering alarm to alarm
Device carries out alarm.
With reference to first aspect, an embodiment of the present invention provides the first possible embodiments of first aspect, wherein on
It is the comparator based on amplifier chip to state comparator；Signal detector and reference cell are respectively connected to same group of amplifier chip
Input port.
With reference to first aspect, an embodiment of the present invention provides second of possible embodiments of first aspect, wherein on
State the reference cell that reference cell is bleeder circuit composition；Wherein, bleeder circuit includes fixed partial pressure circuit and/or adjustable partial pressure
Circuit；When bleeder circuit includes adjustable voltage division circuit, reference cell is additionally operable to detect by adjustable voltage division circuit Regulate signal
The sensitivity of device.
With reference to first aspect, an embodiment of the present invention provides the third possible embodiments of first aspect, wherein on
Relay is stated to connect with comparator by first switch circuit；Above-mentioned first trigger signal is triggering first switch circuit turn-on
Electric signal.
With reference to first aspect, an embodiment of the present invention provides the 4th kind of possible embodiments of first aspect, wherein on
Alarm is stated to connect with comparator by second switch circuit；Second trigger signal is to trigger the telecommunications of second switch circuit turn-on
Number.
The 4th kind of possible embodiment with reference to first aspect, an embodiment of the present invention provides the 5th kind of first aspect
Possible embodiment, wherein above-mentioned apparatus further includes the oscillator being connect with comparator, and the output end of oscillator is opened with second
Powered-down road connection；Oscillator is square-wave oscillator, for sending oscillator signal to alarm when second switch circuit turn-on, with
Control the alarm frequency of alarm.
The 5th kind of possible embodiment with reference to first aspect, an embodiment of the present invention provides the 6th kind of first aspect
Possible embodiment, wherein above-mentioned apparatus further includes power module, above-mentioned comparator, signal detector, relay, alarm
Device and oscillator are connect with power module.
With reference to first aspect, an embodiment of the present invention provides the 7th kind of possible embodiments of first aspect, wherein on
State device and be additionally provided with shell, and with the matched detection probe of shell, detection probe extends to the outside of shell；Above-mentioned comparison
Device, relay and alarm are arranged in the inside of shell, and signal detector is arranged in detection probe, wherein detection probe is
Hollow out is popped one's head in.
The 7th kind of possible embodiment with reference to first aspect, an embodiment of the present invention provides the 8th kind of first aspect
Possible embodiment, wherein above-mentioned apparatus further includes the detection interface being connect with comparator；Detection interface is arranged in shell
Inside, comparator are connect by detecting interface with signal detector.
Second aspect, the embodiment of the present invention additionally provide a kind of gas detecting system, which includes above-mentioned first aspect
The gas-detecting device further includes controlled component；Gas-detecting device is for detecting designated gas in local environment
Concentration parameter, when the corresponding electric signal of concentration parameter is more than pre-set reference signal, where cutting off controlled component
Current supply circuit.
The embodiment of the present invention brings following advantageous effect：
A kind of gas-detecting device provided in an embodiment of the present invention and system are detected by signal detector in local environment
The concentration parameter of designated gas, and the corresponding electric signal of the concentration parameter is exported, when so that comparator receiving electric signal, to this
Electric signal is compared processing, and when the electric signal is more than reference signal, the first trigger signal, cut-out can be sent to relay
The current supply circuit of controlled component, and the second trigger signal is sent to alarm, triggering alarm carries out alarm, inspection
Survey process realizes that scheme is simply and readily realized by comparing device, meanwhile, comparator is not easy to be influenced by environmental factor, carries
The high stability and reliability of gas detection process, it helps improve the Experience Degree of user.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The purpose of the present invention and other advantages are in specification, claims
And specifically noted structure is realized and is obtained in attached drawing.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those skilled in the art, without creative efforts,
Other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of structure diagram of gas-detecting device provided in an embodiment of the present invention；
Fig. 2 is a kind of circuit theory schematic diagram of detection part provided in an embodiment of the present invention；
Fig. 3 is a kind of circuit theory schematic diagram of triggering part provided in an embodiment of the present invention；
Fig. 4 is a kind of circuit theory schematic diagram of gas-detecting device provided in an embodiment of the present invention；
Fig. 5 is a kind of outline structural diagram of gas-detecting device provided in an embodiment of the present invention；
Fig. 6 is the outline structural diagram of another gas-detecting device provided in an embodiment of the present invention；
Fig. 7 is a kind of structure diagram of gas detecting system provided in an embodiment of the present invention.
Icon：10- comparators；20- signal detectors；30- relays；40- alarms；101- reference cells；201- gas
Body sensor component；501- shell covers；502- shells；503- detection probes；504- circuit boards；505- fixing devices；601- power supplys
Interface；700- gas-detecting devices；The controlled components of 701-.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those skilled in the art institute without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Currently, gas-detecting device is chiefly used in kitchen appliance industry, the detection of gas anti-leak is carried out.Existing gas anti-leak
Detection device, it is mostly poor using the detection of chip microcontroller signal and processing procedure, of high cost and stability；Some are based on number
The problem of detection scheme of word circuit or analog circuit is susceptible to afunction, alternatively, the process of its signal processing compares
Complexity causes cost higher, reduces the Experience Degree of user.
Based on this, an embodiment of the present invention provides a kind of gas-detecting device and systems, can simplify the reality of gas detection
Existing scheme, while ensureing the reliability of gas detection, to improve the Experience Degree of user.
For ease of understanding the present embodiment, first to a kind of gas-detecting device disclosed in the embodiment of the present invention into
Row is discussed in detail.
Embodiment one：
An embodiment of the present invention provides a kind of gas-detecting device, a kind of structures of gas-detecting device as shown in Figure 1
Block diagram, the device include：Comparator 10, and the signal detector 20, relay 30 and the alarm 40 that are connect with comparator 10,
Wherein, relay 30 is connect with controlled component (not shown in figure 1).
When specific implementation, above-mentioned signal detector 20 includes gas sensor assemblies 201, for detecting ring residing for the device
The concentration parameter of designated gas in border exports electric signal corresponding with concentration parameter, and electric signal is sent to comparator 10.
Comparator 10 is configured with reference cell 101, and reference cell 101 is previously provided with reference signal；Comparator 10 is used for
Receive electric signal, when electric signal be higher than reference signal when, to relay 30 send the first trigger signal, trigger relay cut-out by
Control the current supply circuit where component；And the second trigger signal is sent to alarm 40, triggering alarm carries out alarm and carries
Show.
When specific implementation, the gas-detecting device described in the embodiment of the present invention can be used for the industries such as kitchen appliance, to various gas
Body, smog, water mist etc. are detected, and therefore, above-mentioned designated gas can be combustion gas, can also be the objects such as various smog, water mist
Matter, accordingly, above-mentioned gas sensor module can be gas security, smoke sensor device and water mist sensor etc., as letter
The detecting element of number detector specifically can be flexibly arranged according to actual use situation, the embodiment of the present invention to this not into
Row limitation.
A kind of gas-detecting device provided in an embodiment of the present invention is detected by signal detector and specifies gas in local environment
The concentration parameter of body, and the corresponding electric signal of the concentration parameter is exported, when so that comparator receiving electric signal, to the electric signal
It is compared processing, when the electric signal is more than reference signal, the first trigger signal can be sent to relay, cut off controlled member
The current supply circuit of device, and the second trigger signal is sent to alarm, triggering alarm carries out alarm, detection process
It is realized by comparing device, scheme is simply and readily realized, meanwhile, comparator is not easy to be influenced by environmental factor, improves gas
The stability and reliability of body detection process, it helps improve the Experience Degree of user.
When specific implementation, comparator provided in an embodiment of the present invention can be the comparator based on amplifier chip；Signal is examined
It surveys device and reference cell is respectively connected to same group of input port of amplifier chip, form the test section of entire gas-detecting device
Point.
Further, said reference unit is the reference cell of bleeder circuit composition；Wherein, bleeder circuit includes fixed partial pressure
Circuit and/or adjustable voltage division circuit；When bleeder circuit includes adjustable voltage division circuit, reference cell is additionally operable to pass through adjustable partial pressure
The sensitivity of circuit Regulate signal detector.
Usual amplifier chip is to use very extensive linear integrated circuit, can lead to too small amount of Resistor-Capacitor Unit
The function of realizing comparator, greatly reduces cost, while a small amount of capacitance resistance ware can also reduce the fault point of entire circuit,
Improve reliability.
In order to make it easy to understand, Fig. 2 shows a kind of circuit theory schematic diagram of detection part, it is with gas sensor assemblies
It is illustrated for gas security, which includes aforementioned signal detector, comparator and reference cell.
As shown in Figure 2, wherein U10 is comparator, is the core element of gas-detecting device, is realized using amplifier chip,
Such as model LM358 or LM324 amplifier chips.Wherein, for convenience of description, Fig. 2 shows comparator be two-way input
The comparator of amplifier chip composition is exported, in other embodiments, the parameter and signal of amplifier chip there can also be other shapes
Formula, also, its packing forms such as patch-type or direct plugging-in etc., can also carry out select and set, this hair according to actual needs
Bright embodiment is not limited this.
Further, MQ shown in Fig. 2 is gas security, MQ connect with resistance R3 divide after with 3 feet of comparator U10 company
It connects, forms signal detector；Resistance R1, R2, R14 and variable resistance R20 form reference cell, 2 feet with comparator U10
Connection, wherein 2 feet of comparator U10 and the same group of input port that 3 feet of comparator U10 are amplifier chip.
When specific implementation, resistance R1 and resistance R2 are composed in series fixed partial pressure circuit, resistance R2, resistance R14 and can power transformation
It hinders R20 and forms adjustable voltage division circuit.
In view of saving element, the purpose of cost is reduced, when actual circuit plate welds, needs to adjust signal detector
When sensitivity, can only welding kesistance R2, resistance R14 and variable resistance R20, welding kesistance R1, does not then pass through variable resistance
R20 adjusts the reference signal of reference cell, realizes the adjustment of sensitivity of signal detector；When without adjusting sensitivity, then not
Variable resistance R20 and resistance R14, welding kesistance R1 and resistance R2 are welded, it, will by resistance R1 and the concatenated modes of resistance R2
Reference signal is set as fixed value.
In order to realize the action of comparator trigger relay and alarm by way of sending trigger signal, aforementioned relay
Device is connect by first switch circuit with comparator；At this point, the first trigger signal is to trigger the telecommunications of first switch circuit turn-on
Number.Further, aforementioned alarm is connect by second switch circuit with comparator；At this point, the second trigger signal is triggering second
The electric signal of switching circuit conducting；So that the triggering part of relay and alarm composition gas-detecting device.
In order to make it easy to understand, on the basis of Fig. 2, Fig. 3 shows a kind of circuit theory schematic diagram of triggering part, including
Relay, alarm and first switch circuit and second switch circuit.
Wherein, U10 is comparator, and K1 is relay, SW1 and two leading-out terminals that SW2 is relay, with controlled first device
Part connects；Meanwhile in order to make relay when power is off, the energy stored in coil can safe release, can also be in relay
One diode D1 of coil both ends parallel connection of device, such as the Schottky diode of model SS14, to increase the safety of circuit.
Triode Q1, resistance R4 and resistance R5 form first switch circuit；Triode Q3, resistance R13 and resistance R10 compositions
Second switch circuit；P1 is buzzer, and buzzer P1, triode Q2 and resistance R11 form alarm, wherein the present invention is real
The alarm described in example is applied, buzzer shown in Fig. 3 is gone out, can also be other audible-visual annunciators, to realize prompt facility.
When specific implementation, comparator U10 exports the first trigger signal, and trigger triode Q1 is connected, after triode Q1 conductings,
The coil turn-on action of relay K1, contact disconnect the current supply circuit where controlled component, and controlled component dead electricity is closed, can
To cut off air source；While comparator U10 exports the first trigger signal, the second trigger signal, trigger triode can also be exported
Q3 is connected, and after triode Q3 conductings, buzzer can send out prompt tone and carry out alarm.
Further, above-mentioned gas detection device can also include the oscillator being connect with comparator so that oscillator it is defeated
Outlet is connect with second switch circuit；When specific implementation, oscillator can be square-wave oscillator, be led for working as second switch circuit
Oscillator signal is sent to alarm when logical, to control the alarm frequency of alarm.
Specifically, as shown in figure 3, capacitance C1 and resistance R6, resistance R7, resistance R8 and resistance R9 form the present invention in fact
The oscillator in example is applied, another group of input port connection of oscillator and comparator passes through corresponding output port and exports oscillation
Signal, the 7th pin of comparator U10 as shown in Figure 3, when specific implementation, the frequency of oscillator signal can be according to actual use
Situation is configured, as by the way that the capacitance of capacitance C1 is arranged or changes the resistance value of other resistance come realizing different frequency
The output of oscillator signal, to control the period of the prompt tone of buzzer.
On the basis of Fig. 2 and Fig. 3, the embodiment of the present invention additionally provides a kind of circuit theory signal of gas-detecting device
Figure, as shown in figure 4, the electricity of circuit theory schematic diagram and triggering part shown in Fig. 3 including detection part shown in Fig. 2
Road principle schematic, when specific implementation, above-mentioned first trigger signal and the second trigger signal can be simultaneously emitted by, therefore, in Fig. 4
Shown in gas-detecting device circuit theory schematic diagram in, the triggering of the triggering end and second switch circuit of first switch circuit
End is commonly connected to the output pin of comparator U10.
Further, it is also associated with positive feedback resistor in the triggering end of second switch circuit and the output end of signal detector,
Resistance R15 as shown in Figure 4 has corresponding alarm start and stop voltage threshold respectively so that before and after gas-detecting device alarm, improves
The Stability and dependability of whole device.
When specific implementation, above-mentioned gas detection device further includes power module, aforementioned comparator, signal detector, relay
Device, alarm and oscillator are connect with power module, are powered by the power module.Therefore, in Fig. 4 further include power supply
The circuit theory schematic diagram of module, including connecting terminal J1 and capacitance C2 and capacitance C3.In actual use, above-mentioned wiring
Terminal J1 can be connect with matched power supply adaptor, access power supply, such as 5V power supplies, realized and filled to gas detection
Set power supply.
The circuit theory schematic diagram of gas-detecting device based on shown in Fig. 4, the detection process of above-mentioned gas detection device
May include：The concentration parameter of the corresponding gas (combustion gas) of gas sensor assemblies detection, exports corresponding electric signal, and electric signal is logical
It crosses comparator to be detected, when the corresponding electric signal of concentration parameter reaches reference signal, comparator exports the first trigger signal
To relay, relay is allowed to cut off the current supply circuit where controlled component, and exports the second trigger signal to alarm, activation
Buzzer warning, buzzer export control start and stop rhythm by oscillator, send out alarm sound.
When specific implementation, the circuit structures such as above-mentioned comparator, signal detector, relay, alarm and oscillator can be with
On circuit boards, which is arranged in a shell, to realize the function of gas-detecting device for printing.Therefore, above-mentioned gas
Body detection device is additionally provided with shell.
Fig. 5 shows a kind of outline structural diagram of gas-detecting device, wherein Fig. 5 be gas-detecting device as
Described in Fig. 5, above-mentioned shell includes shell cover 501 and shell 502, and with the matched detection probe of shell 503, wherein detection is visited
First 503 extend to the outside of shell.Comparator, relay and alarm are arranged in the inside of shell, circuit board as shown in Figure 5
504, wherein the circuit board 504 can be the corresponding circuit board of circuit diagram shown in Fig. 4.Signal detector setting is detecting
In probe 503, wherein detection probe is popped one's head in for hollow out, in order to which signal detector is contacted with gas, detects the dense of designated gas
Spend parameter.
Further, it is contemplated that circuit board will receive the phenomenon that influences such as water mist smog are corroded, the inside of above-mentioned shell
Encapsulating processing can also be carried out, is sealed.
It is fixed and installs for the ease of above-mentioned gas detection device, on above-mentioned shell, be also provided with fixation
Device 505 so that gas-detecting device can be fixed and installed by fasteners such as screws.
Fig. 6 shows the outline structural diagram of another gas-detecting device, in addition to structure shown in fig. 5, further includes
Power interface 601, gas-detecting device can by the power interface 601 connect power supply adaptor, and then with extraneous alternating current
Source connects, and AC power is converted into being transferred to the power module of gas-detecting device, Jin Ershi after direct current by power supply adaptor
The power supply process of existing gas-detecting device.
Further, the gas-detecting device described in the embodiment of the present invention further includes the detection interface (Fig. 5 being connect with comparator
In be not shown)；The detection interface is arranged in the inside of shell, and on circuit board 504, comparator is examined by detecting interface with signal
Device connection is surveyed, when specific implementation, gas sensor assemblies can be arranged to by the detection interface by multiple sensors, Yong Huke
It, also can cigarette receiving in addition to conventional gas security to need to connect different sensors according to actually detected and carry out gas detection
The sensors such as mist, water mist increase the using flexible of gas-detecting device as the starting module of entire gas-detecting device
And the scope of application, meanwhile, without change circuit board, reduce use cost.
It should be appreciated that above-mentioned Fig. 2, Fig. 3 and circuit diagram shown in Fig. 4 are only provided in an embodiment of the present invention one
The model and parameter of kind preferred form, Resistor-Capacitor Unit and diode and triode can be carried out according to actual use situation
Setting；Further, Fig. 5 and contour structures shown in fig. 6 and a kind of preferred form of the embodiment of the present invention, in other implementations
In mode, above-mentioned detection probe can also be arranged in other sides of shell, meanwhile, above-mentioned fixing device can also be according to reality
Use demand is arranged to other forms, and it is not limited by the embodiments of the present invention.
Embodiment two：
On the basis of the above embodiments, the embodiment of the present invention additionally provides a kind of gas detecting system, as shown in Figure 7
A kind of structure diagram of gas detecting system, including the gas-detecting device 700 described in above-described embodiment one, further include controlled member
Device 701.
When specific implementation, above-mentioned gas detection device is used to detect the concentration parameter of designated gas in local environment, when dense
When spending the corresponding electric signal of parameter more than pre-set reference signal, the current supply circuit where controlled component is cut off.
Specifically, above-mentioned controlled component can be attached with the relay of gas-detecting device, wherein the present invention is real
The controlled component described in example is applied, can be solenoid valve such as the solenoid valve of gas-cooker can also be electromagnetic valve for gas water heater,
Or gas may be implemented by way of connecting above-mentioned controlled component with gas-detecting device in switch for fume exhauster etc.
The function of anti-leak and alarm.
Gas detecting system provided in an embodiment of the present invention has identical with the gas-detecting device that above-described embodiment provides
Technical characteristic reach identical technique effect so can also solve identical technical problem.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
It with the specific work process of device, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi
Connection inside two elements.To those skilled in the art, it can understand above-mentioned term in the present invention with concrete condition
Concrete meaning.
In the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for the description present invention and simplify description, do not indicate or imply the indicated device or element must have a particular orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for description purposes only, and is not understood to indicate or imply relative importance.
Finally it should be noted that：Above example, only specific implementation mode of the invention, to illustrate the skill of the present invention
Art scheme, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to the present invention into
Go detailed description, it should be understood by those skilled in the art that：Any one skilled in the art takes off in the present invention
In the technical scope of dew, it can still modify to the technical solution recorded in previous embodiment or can readily occur in change
Change or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make relevant art
Scheme essence be detached from technical solution of the embodiment of the present invention spirit and scope, should all cover protection scope of the present invention it
It is interior.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (10)
1. a kind of gas-detecting device, which is characterized in that described device includes：Comparator, and connect with the comparator
Signal detector, relay and alarm, wherein the relay is connect with controlled component；
The signal detector includes gas sensor assemblies, the concentration for detecting designated gas in described device local environment
Parameter exports electric signal corresponding with the concentration parameter, and the electric signal is sent to the comparator；
The comparator arrangement has reference cell, the reference cell to be previously provided with reference signal；
The comparator is for receiving the electric signal, when the electric signal is higher than the reference signal, to the relay
The first trigger signal is sent, the relay is triggered and cuts off current supply circuit where the controlled component；And
The second trigger signal is sent to the alarm, the alarm is triggered and carries out alarm.
2. the apparatus according to claim 1, which is characterized in that the comparator is the comparator based on amplifier chip；
The signal detector and the reference cell are respectively connected to same group of input port of the amplifier chip.
3. the apparatus according to claim 1, which is characterized in that the reference cell is the benchmark list of bleeder circuit composition
Member；Wherein, the bleeder circuit includes fixed partial pressure circuit and/or adjustable voltage division circuit；
When the bleeder circuit includes the adjustable voltage division circuit, the reference cell is additionally operable to through adjustable partial pressure electricity
Road adjusts the sensitivity of the signal detector.
4. the apparatus according to claim 1, which is characterized in that the relay passes through first switch circuit and the comparison
Device connects；First trigger signal is to trigger the electric signal of the first switch circuit turn-on.
5. the apparatus according to claim 1, which is characterized in that the alarm passes through second switch circuit and the comparison
Device connects；Second trigger signal is to trigger the electric signal of the second switch circuit turn-on.
6. device according to claim 5, which is characterized in that described device further includes the oscillation being connect with the comparator
Device, the output end of the oscillator are connect with the second switch circuit；
The oscillator is square-wave oscillator, for sending oscillation letter to the alarm when the second switch circuit turn-on
Number, to control the alarm frequency of the alarm.
7. device according to claim 6, which is characterized in that described device further includes power module, the comparator, institute
Signal detector, the relay, the alarm and the oscillator is stated to connect with the power module.
8. the apparatus according to claim 1, which is characterized in that described device is additionally provided with shell, and with the shell
Matched detection probe, the detection probe extend to the outside of the shell；
The comparator, the relay and the alarm are arranged in the inside of the shell, the signal detector setting
In the detection probe, wherein the detection probe is popped one's head in for hollow out.
9. device according to claim 8, which is characterized in that described device further includes the detection being connect with the comparator
Interface；
The detection interface is arranged in the inside of the shell, and the comparator passes through the detection interface and the signal detection
Device connects.
10. a kind of gas detecting system, which is characterized in that the system comprises the inspections of claim 1~9 any one of them gas
Device is surveyed, further includes controlled component；
The gas-detecting device is used to detect the concentration parameter of designated gas in local environment, when the concentration parameter is corresponding
When electric signal is more than pre-set reference signal, the current supply circuit where the controlled component is cut off.
Priority Applications (1)
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|---|---|---|---|
| CN201810364397.0A CN108760978A (en) | 2018-04-20 | 2018-04-20 | Gas-detecting device and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810364397.0A CN108760978A (en) | 2018-04-20 | 2018-04-20 | Gas-detecting device and system |
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| CN201810364397.0A Pending CN108760978A (en) | 2018-04-20 | 2018-04-20 | Gas-detecting device and system |
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