CN211902959U - Image flame detector - Google Patents

Abstract

The image flame detector comprises a voltage-stabilized power supply, a singlechip module, a GPRS module, a temperature transmitter, a control circuit and a display circuit; the temperature transmitter is arranged in the natural gas burner body, and a temperature sensing head of the temperature transmitter is positioned in the hearth; the stabilized voltage supply, the singlechip module, the GPRS module, the control circuit and the display circuit are arranged in the element box; and is connected with the temperature transmitter through a lead. The method has the advantages that a manager can obtain the on-site temperature and flame size change data in the boiler furnace through the waveform image display of a mobile phone or a PC at a far end, and can give the manager the prompt of the temperature and the flame size in the boiler furnace through the light emitting condition of different light emitting diodes on site, so that convenience is brought to the manager for obtaining the data of the temperature and the flame size in the boiler furnace. Based on the above, this is novel has good application prospect.

Description

Image flame detector

Technical Field

The utility model relates to a combustor corollary equipment technical field, especially an image flame detector.

Background

In the field of using burners in industrial production, in order to ensure the overall safe operation of equipment, a flame detector is required to be adopted to monitor the combustion condition of the burners (such as burners used by a thermal generator set boiler and burners used by a heating boiler), and whether the burners are in a combustion state and whether an overtemperature phenomenon occurs (the overtemperature is generally caused by too large fuel or gas input into the burners, and then the potential hazard that the related equipment is damaged due to too high pressure caused by too high water temperature in the boiler and the gas or fuel can be wasted) is mainly monitored.

The supporting combustion state monitoring devices (that is, flame detector) that current combustor used generally includes thermocouple test probe, signal processing equipment and necessary protective housing etc. in the application, the thermocouple test probe front end direct detection boiler's the interior flame of burning produced the temperature variation, then with signal transmission for signal processing equipment after handling, signal processing equipment instructs through the mode of on-the-spot pointer, the scale interval that the pointer instructed when the temperature is high, flame intensity is big, the scale interval that the pointer instructed when the temperature is low, flame intensity is low is little. Because the existing flame detector can only output temperature and flame data on site, and only needs a manager to actively observe the data on site to know the combustion working condition of the burner, the inconvenience is brought to the manager, and if the combustion temperature of the burner is overhigh, the flame is overhigh or the temperature is overlow or the flame is overlow, the manager does not observe the temperature change on site in real time, namely when the flame condition of the burner is not known in real time, the influence is caused on the normal work of a boiler and the like; moreover, the existing flame detector indicates the change of temperature and flame size by a pointer, and the prompt of the change effect of temperature and flame is not obvious, so certain defects exist. Based on the above, it is particularly necessary to provide a flame detector which can not only meet the requirement that a manager watches the temperature and the flame size change on site, but also can grasp the temperature and the flame size data of a combustor on site in real time at a far end.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems that the combustion state monitoring device (i.e. the flame detector) used by the existing burner can only display the change of the temperature and the flame size in the hearth in a site pointer mode due to the limited structure, and the manager can observe the change of the temperature and the flame size on site actively to know the combustion working condition of the burner, which brings inconvenience to the manager, if the combustion temperature of the burner is too high, the flame is too large or the temperature is too low, the flame is too small, and the manager can not observe the change of the temperature and the flame size on site in real time, which can affect the normal work of boilers and the like, and the pointer can display the change of the temperature and the flame and has unobvious prompting effect, the utility model provides a monitoring device which can display the change data of the site temperature and the flame size in the hearth of the boiler in a remote end in a waveform image mode of a mobile phone or a PC machine, the device can also give the manager temperature and flame size prompts in the furnace of the boiler in a field through the light emitting condition modes of different light emitting diodes, so that the manager can obtain the temperature and flame size data in the furnace of the boiler, and a convenient image flame detector is provided.

The utility model provides a technical scheme that its technical problem adopted is:

the image flame detector comprises a voltage-stabilized power supply, a singlechip module, a GPRS module and a temperature transmitter, and is characterized by also comprising a control circuit and a display circuit; the temperature transmitter is arranged in the natural gas burner body, and a temperature sensing head of the temperature transmitter is positioned in the hearth; the stabilized voltage supply, the singlechip module, the GPRS module, the control circuit and the display circuit are arranged in an element box; the two ends of the power output of the voltage-stabilized power supply are respectively and electrically connected with the two ends of the power input of the singlechip module, the GPRS module, the temperature transmitter and the control circuit; the signal output end of the temperature transmitter is electrically connected with the signal input ends of the singlechip module and the control circuit, and the signal output end of the singlechip module is electrically connected with the signal input end of the GPRS module; the power output end of the control circuit is electrically connected with the positive power input end of the display circuit, and the negative power output end of the stabilized voltage power supply is electrically connected with the negative power input ends of the control circuit and the display circuit.

Further, the stabilized voltage supply is an alternating current to direct current switching power supply module.

Furthermore, the model of the master control chip of the single chip microcomputer module is STC12C5A60S2, and a sampling resistor is connected in series in front of the analog signal access end of the single chip microcomputer module.

Further, the GPRS module model is ZLAN8100, and the temperature transmitter is a rhodium thermocouple temperature transmitter of model SBWRP 2-230.

Further, the control circuit comprises an NPN triode and a resistor, wherein the NPN triode and the resistor are connected through a circuit board in a wiring mode, one end of the first resistor is connected with a collector of the second NPN triode, an emitter of the second NPN triode is connected with one end of the second resistor, the emitter of the first NPN triode is connected with the other end of the second resistor, and the collector of the first NPN triode is connected with the other end of the first resistor and a base of the second NPN triode.

Furthermore, the display circuit comprises adjustable resistors and light emitting diodes, the adjustable resistors and the light emitting diodes are connected through circuit board wiring, one ends of the three adjustable resistors are connected, the other ends of the three adjustable resistors are respectively connected with anodes of the three light emitting diodes, cathodes of the three light emitting diodes are connected, and resistance values of the three adjustable resistors are different.

The utility model has the advantages that: this novel use before with current natural gas burner be identical completely, the outside is installed in the furnace front side before the trachea of natural gas burner body. In the novel application, after the natural gas burner body is burnt, the natural gas burner body is influenced by different temperatures and flame sizes in a hearth of a boiler, voltage signals output by a temperature transmitter are different, when the temperature is high, the flame is high, when the temperature is low, the flame is low, the voltage is low, and after dynamically changed signal voltages enter a control circuit and a display circuit, three light-emitting diodes can be respectively in a light-emitting state or a non-light-emitting state according to different signal voltage sizes, when the temperature is low, the number of light-emitting diodes is small, when the temperature is high, the number of light-emitting diodes is large, all the light-emitting diodes do not emit light to represent that a fire source is extinguished, so that a manager can directly know whether the flame in the hearth is extinguished or is in a small flame, proper flame or overlarge flame state, and the flame effect, brings convenience to the manager. In the application of the utility model, after the dynamically changed signal voltage enters the finished product of the single chip microcomputer module, the finished product of the single chip microcomputer module can convert the input dynamically changed analog voltage signal into a dynamically changed digital signal and output the dynamically changed digital signal to the signal input end of the finished product of the GPRS module, and the finished product of the GPRS module can transmit the input dynamically changed digital signal out through a wireless mobile network under the action of the internal circuit of the finished product of the GPRS module; the remote management party which is connected with the GPRS module finished product converts the dynamically changed digital signals into the oscillogram by combining the prior mature technology and pre-installing the prior oscillogram display application through a mobile phone or a PC, and managers can monitor the temperature of the burner and the change of the flame size at the remote end in real time through a screen of the mobile phone or the PC, wherein when the temperature is high and the flame is large, the oscillogram is high, when the temperature is low and the flame is small, the peak value of the oscillogram is low. Through the above, once the waveform diagram changes monitored by the management party in real time through the screen of the mobile phone or the PC, and the waveform diagram is found to be different from the average (the waveform diagram is too low or is in an ultrahigh waveform diagram), the phenomena of combustion stopping or too high temperature and flame and the like of the combustor are represented, when the difference between the temperature and flame data and the normal data is large, the manager can arrive at the site in time, or other nearby related personnel are informed, measures are taken to relight the extinguished burner or reduce the combustion intensity of the burner (the valve core of the valve for feeding natural gas or atomized fuel into the burner is closed relatively slightly, or the valve core of the valve for feeding natural gas or atomized fuel into the burner is opened relatively greatly when the temperature is too low and the fire source is not extinguished), so that the normal work of the burner is ensured to heat boilers and the like, and convenience is brought to the management of managers. Based on the aforesaid, this novel application prospect that has.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic plan view of the present invention;

fig. 2 is a circuit diagram of the present invention.

Detailed Description

As shown in figure 1, the image flame detector comprises a voltage-stabilized power supply 1, a singlechip module 2 and a GPRS module 3, a platinum rhodium thermocouple temperature transmitter 4, a natural gas burner body 5 is installed at the lower end of the front side of a boiler furnace 6, an ignition gun 51 of the burner body is transversely positioned in a fixed pipe 53 at the middle part of a gas pipe 52 of the burner body, the front side of the ignition gun 51 is positioned in the furnace 6, the outer side of the ignition gun 51 and the inner side of the gas pipe 52 of the burner body are in an isolated state, the rear side end of the ignition gun 51 is positioned outside the rearmost side of the gas pipe 52, a gas pipe 54 and an air pipe 55 at the upper and lower ends of the rear part of the gas pipe 52 are respectively connected with a natural gas supply pipe and a blower exhaust pipe through a pipeline and a pipeline joint, a circular fixing plate 56 with a fixing hole at the outer side of the front end of the gas pipe of the burner body 5; a supporting plate 57 is welded on the outer side of the front middle part of the air pipe 52 (the supporting plate 57 supports the fixing pipe 53), a plurality of holes 571 are distributed on the supporting plate 57, so that natural gas and air can enter the front end of the air pipe 52 through the holes 571 of the supporting plate and enter the hearth 6 to be combusted, the middle part of a detection pipe of the temperature transmitter 4 is transversely installed at the hole 571 at the middle part of the upper end of the supporting plate 57 through the external threads of the detection pipe, a temperature sensing head at the front end of the temperature transmitter 4 is positioned at the front outer side end of the air pipe 52 and positioned in the front of the hearth 6, the electrical parts of the middle part and the rear end of a shell of the temperature transmitter 4 are positioned at; the stabilized voltage power supply 1, the singlechip module 2, the GPRS module 3, the control circuit 7 and the display circuit 8 are installed on a circuit board, the circuit board is installed in an element box 9, and the element box 9 is installed in an electric control box.

As shown in FIGS. 1 and 2, a stabilized voltage power supply A adopts a finished product of a brand bright weft AC 220V-to-12V DC switching power supply module. The single chip microcomputer module A2 is a single chip microcomputer module finished product with a master control chip model STC12C5A60S2, the single chip microcomputer module finished product A2 is provided with a group of analog signal access ends, namely a pin 3 and a pin 4, two power input ends, namely a pin 1 and a pin 2, the single chip microcomputer module finished product A2 is provided with an RS485 data output port, and the front parts of the analog signal access ends, namely the pin 3 and the pin 4, of the single chip microcomputer module finished product A2 are respectively connected in series with a sampling resistor R3 and a sampling resistor R4. The model of the GPRS module A3 is ZLAN8100, the working voltage of a GPRS module finished product A3 is direct current 12V, and an RS485 data input port is arranged on the GPRS module finished product A3. The platinum-rhodium thermocouple temperature transmitter A1 is a rhodium thermocouple temperature transmitter finished product with model number SBWRP2-230, has the highest detection temperature of 1600 ℃, the working voltage of direct current of 12V, and is provided with two power supply wires 1 and 2 pins and a signal output wire 3 pin, when the front-end probe works, the detected temperature is different, and the signal output wire 3 pin can output a voltage signal which is changed between 0 and 10V. The control circuit comprises NPN triodes Q1 and Q2 and resistors R1 and R2 which are connected through a circuit board in a wiring mode, one end of a first resistor R1 is connected with a collector of a second NPN triode Q2, an emitter of the second NPN triode Q2 is connected with one end of a second resistor R2, the emitter of the first NPN triode Q1 is connected with the other end of a second resistor R2, and a collector of the first NPN triode Q1 is connected with the other end of a first resistor R1 and a base of the second NPN triode Q2. The display circuit comprises adjustable resistors RP1, RP2, RP3 and light emitting diodes VL1, VL2 and VL3 which are connected through circuit board wiring, one ends of three adjustable resistors RP1, RP2 and RP3 are connected, the other ends of three adjustable resistors RP1, RP2 and RP3 are respectively connected with anodes of three light emitting diodes VL1, VL2 and VL3, cathodes of three light emitting diodes VL1, VL2 and VL3 are connected, the resistance values of three adjustable resistors RP1, RP2 and RP3 are different, the light emitting surfaces of three light emitting diodes VL1, VL2 and VL3(81) are respectively positioned outside three openings at the front outer side end of the element box 9, and the front outer side of the element box 9 positioned at the ends of the three light emitting diodes VL1, VL2 and VL3 is respectively marked with a small flame, a proper flame and an overlarge flame. Two ends 1 and 2 of the power input of a voltage-stabilized power supply A are respectively connected with two poles of an alternating current 220V power supply through leads, two ends 3 and 4 of the power output of the voltage-stabilized power supply A are respectively connected with two ends 1 and 2 of the power input of a singlechip module A2, two ends 1 and 2 of the power input of a GPRS module A3, two ends 1 and 2 of the power input of a temperature transmitter A1, one end of a resistor R1 at two ends of the power input of a control circuit and an emitting electrode of an NPN triode Q1 through leads; a pin 3 of a signal output end of the temperature transmitter A1 is connected with the other end of a resistor R3 (the other end of the resistor R4 is connected with a pin 2 of a negative power supply input end of the singlechip module A2) of a signal input end of the singlechip module A2, a base electrode of an NPN triode Q1 of a signal input end of a control circuit is connected through a lead, and a signal output end of the singlechip module A2 is connected with a signal input end of the GPRS module A3 through an RS485 data line; an emitting electrode of an NPN triode Q2 at the power output end of the control circuit is connected with one end of adjustable resistors RP1, RP2, RP3 and RP4 at the positive power input end of the display circuit through a lead, and a pin 4 at the negative power output end of the stabilized voltage power supply A is connected with an emitting electrode of an NPN triode Q1 at the negative power input end of the control circuit and negative power input ends of three light-emitting diodes VL1, VL2 and VL3 of the display circuit through leads.

As shown in figures 1 and 2, before the novel natural gas burner is used, the novel natural gas burner is completely consistent with the existing natural gas burner, and the front outer side of a gas pipe 52 of a natural gas burner body is arranged on the front side of a hearth 6; natural gas and gas output by the blower are mixed in the gas pipe 52 and then enter the front inner side end of the hearth 6, after an operator presses a power button of the ignition gun 51, an ignition head at the front end of the ignition gun 51 generates electric sparks to ignite the mixed gas entering the hearth 6, and therefore heat generated after gas combustion acts on a boiler at the upper end of the boiler hearth 6 and heats a heat absorbing medium in the boiler. In this novel, behind 220V alternating current power supply entering constant voltage power supply A's 1 and 2 feet, constant voltage power supply A's 3 and 4 feet can export stable 12V power and get into single chip module A2, GPRS module A3, temperature transmitter A1, control circuit's power input both ends, then, single chip module A2, GPRS module A3, temperature transmitter A1, control circuit are in the operating condition that gets electricity. After the natural gas burner body 5 burns, heat generated by the flame 10 acts on the front-end temperature sensing head of the temperature transmitter a1, so that when the temperature and the flame size in the hearth 6 of the boiler are different, the 3 pins of the temperature transmitter a1 can output signal voltages with different sizes, the temperature is high, the flame voltage is high when the flame is large, the temperature is low, the flame voltage is low when the flame is small, and a voltage signal output by the temperature transmitter a1 simultaneously enters the base of an NPN triode Q1 of the control circuit and the other end of a signal input end resistor R3 of the singlechip module a 2. In the control circuit, an NPN triode Q1 is a common emitter amplifier, an NPN triode Q2 is a common emitter follower (resistors R1 and R2 are peripheral elements of NPN triodes Q1 and Q2 respectively), when a signal voltage output by a pin 3 of a temperature transmitter A1 enters a base of an NPN triode Q1 of the control circuit, the NPN triode Q1 amplifies the signal voltage, outputs the signal voltage through an emitter of an NPN triode Q2, simultaneously enters one end of three adjustable resistors RP1, RP2 and RP3, then respectively reduces the voltage and limits the current through three adjustable resistors RP1, RP2 and RP3, and then enters an anode power supply input end of three light-emitting diodes VL1, VL2 and VL3, because the cathode power supply input ends of the three light-emitting diodes VL1, VL2 and VL3 are connected with a pin 4 of a regulated power supply A, the resistance values of the three adjustable resistors RP1, 2 and RP3 are different, so that a flame in different combustion states and a furnace is at high or low temperature, three light-emitting diodes VL1, VL2 and VL3 are respectively electrified to emit light; when the fire source in the hearth is extinguished and the temperature of flame is not too low, all the light-emitting diodes cannot be powered to emit light; when the fire source in the hearth is not extinguished and the temperature of the flame is too low, only the first light-emitting diode VL1 is electrified to emit light (or the second light-emitting diode VL2 emits extremely low light rays at the same time); when the fire source in the hearth is not extinguished and the flame size is normal, the first light-emitting diode VL1 and the second light-emitting diode VL2 can both emit light electrically (or the third light-emitting diode VL3 emits extremely low light rays at the same time); when the fire source in the hearth is not extinguished and the flame size is abnormal and the temperature is too high, the first light-emitting diode VL1, the second light-emitting diode VL2 and the third light-emitting diode VL3 can be electrically lighted; like this, managers just can be through emitting diode VL1, VL2, VL3 luminous condition after arriving the scene, whether the flame is extinguished or is in little flame, suitable flame or too big flame state in the furnace is known directly perceivedly, need not know the interior flame condition of furnace through judging pointer indicating mode, know the flame effect more directly perceived obvious, brought the convenience (through the pointer mode, know the interior flame condition of furnace and still have inconvenient observation pointer directive problem when on-the-spot light is not good) for managers. In this novel practical application, temperature transmitter A1 front end temperature sensing head can not with the interior flame direct contact of furnace when flame is not very big, and the high temperature that the flame produced in the furnace can act on the temperature sensing head.

As shown in fig. 2, under the influence of different temperatures and flame sizes in the furnace 6 of the boiler, the signal voltages output by the pins 3 of the temperature transmitter a1 with different magnitudes enter the pins 3 of the finished product a2 of the single chip module (the pins 4 of the finished product a2 of the single chip module are connected to the pins 4 of the regulated power supply a through the resistors R4 for voltage reduction and current limitation), so that the dynamic change analog voltage signal input by the pins 3 of the temperature transmitter a1 is converted into a dynamic change digital signal by the action of the internal circuit of the single chip module a2, and is output to the signal input end of the finished product A3 of the GPRS module, and the input dynamic change digital signal is transmitted by the GPRS module a 3526 through the wireless mobile network under the action of the internal circuit of the finished product A3 of the GPRS module; the remote management party which establishes connection with the GPRS module finished product A3 combines the existing mature technology, and the existing oscillogram display application is pre-installed through a mobile phone or a PC, so that the dynamically changed digital signals are converted into the oscillogram, and the manager can monitor the flame and temperature change of the burner through the screen of the mobile phone or the PC at the remote end in real time, wherein when the temperature and the flame are high, the oscillogram is high, and when the temperature and the flame are low, the peak value of the oscillogram is low. Through the above, once the waveform diagram changes through real-time monitoring by a mobile phone or a PC screen, the management party finds that the waveform diagram is even and has a difference (the waveform diagram is too low or is in an ultrahigh waveform diagram), the phenomenon that the combustor stops burning or the temperature is too high is represented, when the temperature data has a larger difference with normal data, the management personnel can arrive at the site in time or inform other nearby related personnel, measures are taken to relight the extinguished combustor or reduce the burning intensity of the combustor (the valve core of the natural gas inlet or atomized fuel inlet valve of the combustor is closed relatively slightly, or the fire source with too low temperature is not extinguished, and the combustor enters the weather or the valve core of the atomized fuel inlet valve is opened relatively slightly), and the combustor is ensured to normally heat a boiler and the like. The utility model discloses managers not only can be at the distal end, show through cell-phone or PC waveform image mode, real-time site temperature and flame size change data in the furnace of acquireing the boiler, can also be at the scene through different emitting diode's the luminous condition mode, give the furnace of managers boiler in temperature and the suggestion of flame size, obtain the furnace of boiler temperature and flame size data for managers from this and provide convenience. This novel when not using close constant voltage power supply A's switch just can, follow-up all can lose the power and can no longer work through constant voltage power supply A powered circuit.

In fig. 1 and 2, when the novel primary production is carried out, the resistance values of the adjustable resistors RP1, RP2 and RP3 need to be determined. Firstly determining the resistance value of an adjustable resistor RP1, adjusting the flame size in a hearth 6 by a technician according to the flame size condition in the hearth, adjusting the flame size to be smaller by the technician by adjusting a natural gas supply valve in the hearth, and enabling the flame size to be lower than that of the flame in a normally heated boiler, then adjusting an adjusting knob of an adjustable resistor RP1, adjusting the resistance value of an adjustable resistor RP1 to be required when the light emitting diode VL1 is just adjusted to emit light (at the moment, the voltage of A3-pin output signal of a temperature transmitter A1 is about 5V, and the resistance value of an adjustable resistor RP1 is adjusted to about 500 omega), and in subsequent practical application, when a fire source in the hearth is not extinguished and the temperature of the flame is too low, electrically emitting the first light emitting diode VL1 (or the second light emitting diode VL2 emits extremely low light rays). When the resistance value of the adjustable resistor RP2 is determined, a technician adjusts the flame in the furnace 6 according to the condition that the flame is relatively large in the furnace by adjusting a natural gas supply valve, so that the flame approaches the size of the flame under a normally heated boiler, then the technician adjusts an adjusting knob of the adjustable resistor RP2, when the flame is just adjusted to emit light by the light emitting diode VL2, the resistance value of the adjustable resistor RP2 is adjusted to be required (at the moment, the voltage of A3-pin output signal of the temperature transmitter A1 is about 5.5V, and the resistance value of the adjustable resistor RP2 is adjusted to be about 600 omega), in subsequent practical application, when a flame source in the furnace is not extinguished and the flame is normal in size, both the first light emitting diode VL1 and the second light emitting diode VL2 can emit light electrically (or the third light emitting diode VL3 emits extremely low light rays), when the first light emitting diode VL1 was very bright, the second light emitting diode VL2 was not very bright, indicating a flame size slightly less than normal. When the resistance value of the adjustable resistor RP3 is determined, a technician adjusts the flame in the hearth 6 according to the condition that the flame is relatively larger by adjusting a natural gas supply valve, so that the flame exceeds the flame of a normally heated boiler, then the technician adjusts an adjusting knob of the adjustable resistor RP3, when the flame is just adjusted to emit light by the light emitting diode VL3, the resistance value of the adjustable resistor RP3 is adjusted to be required (at the moment, the voltage of A3-pin output signal of the temperature transmitter A1 is about 6V, and the resistance value of the adjustable resistor RP3 is adjusted to be about 700 omega), in subsequent practical application, when a fire source in the hearth is not extinguished, and the flame and the temperature exceed normal values, the first light emitting diode VL1, the second light emitting diode VL2 and the third light emitting diode VL2 can be electrically illuminated, and when the first light emitting diode VL1, the second light emitting diode VL 24, the third light emitting diode VL2 and, VL2 was very bright and the third LED VL2 was not very bright, indicating that the flame size was slightly larger than normal. After the resistance values of the adjustable resistors RP1, RP2 and RP3 are adjusted, the adjustable resistors RP1, RP2 and RP3 are disconnected from the circuit, resistance values are measured by using resistance levels of a universal meter respectively, the measured resistance values are the resistance values of the adjustable resistors RP1, RP2 and RP3 required by subsequent production, before the subsequent actual production, the resistance values of the adjustable resistors RP1, RP2 and RP3 are not required to be determined, the resistance values of the adjustable resistors RP1, RP2 and RP3 can be directly adjusted in place, or fixed resistors with the same resistance values are adopted for replacing. As shown in fig. 2, the adjustable resistors RP1, RP2, RP3 are of size 2K; the resistances of the resistors R1, R2, R3 and R4 are 2K, 800 omega, 470 omega and 470 omega respectively; model numbers of NPN triodes Q1 and Q2 are 9014 and 9013 respectively; the light emitting diodes VL1, VL2, VL3 are blue light emitting diodes.

Having shown and described the fundamental principles and essential features of the invention, and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (6)

1. The image flame detector comprises a voltage-stabilized power supply, a singlechip module, a GPRS module and a temperature transmitter, and is characterized by also comprising a control circuit and a display circuit; the temperature transmitter is arranged in the natural gas burner body, and a temperature sensing head of the temperature transmitter is positioned in the hearth; the stabilized voltage supply, the singlechip module, the GPRS module, the control circuit and the display circuit are arranged in an element box; the two ends of the power output of the voltage-stabilized power supply are respectively and electrically connected with the two ends of the power input of the singlechip module, the GPRS module, the temperature transmitter and the control circuit; the signal output end of the temperature transmitter is electrically connected with the signal input ends of the singlechip module and the control circuit, and the signal output end of the singlechip module is electrically connected with the signal input end of the GPRS module; the power output end of the control circuit is electrically connected with the positive power input end of the display circuit, and the negative power output end of the stabilized voltage power supply is electrically connected with the negative power input ends of the control circuit and the display circuit.

2. The image flame detector of claim 1, wherein the regulated power supply is an ac to dc switching power supply module.

3. The image flame detector of claim 1, wherein the model of the master control chip of the single chip microcomputer module is STC12C5A60S2, and a sampling resistor is connected in series with the front end of the analog signal access end of the single chip microcomputer module.

4. A picture flame detector as claimed in claim 1, wherein the GPRS module is model ZLAN8100 and the temperature transmitter is a rhodium thermocouple temperature transmitter of model SBWRP 2-230.

5. The image flame detector of claim 1, wherein the control circuit comprises an NPN transistor and a resistor connected via wiring on the circuit board, wherein one end of the first resistor is connected to a collector of the second NPN transistor, an emitter of the second NPN transistor is connected to one end of the second resistor, an emitter of the first NPN transistor is connected to the other end of the second resistor, and a collector of the first NPN transistor is connected to the other end of the first resistor and a base of the second NPN transistor.

6. An image flame detector as claimed in claim 1, wherein the display circuit comprises an adjustable resistor and a light emitting diode connected via wiring of a circuit board, three adjustable resistors are connected at one end, the other end of the three adjustable resistors is connected to anodes of three light emitting diodes, respectively, cathodes of the three light emitting diodes are connected, and resistance values of the three adjustable resistors are different.

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