CN213958228U - Anti-interference and wireless communication gas detector - Google Patents
Anti-interference and wireless communication gas detector Download PDFInfo
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- CN213958228U CN213958228U CN202120269512.3U CN202120269512U CN213958228U CN 213958228 U CN213958228 U CN 213958228U CN 202120269512 U CN202120269512 U CN 202120269512U CN 213958228 U CN213958228 U CN 213958228U
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Abstract
The utility model discloses an anti-interference, wireless communication gas detector, include: the system comprises a microcontroller, a sensor module, a signal acquisition module and a wireless mobile communication module; the sensor module is provided with a sensor matching circuit, the sensor matching circuit is provided with an output end for replacing different sensor components, and the output end is coupled with a continuous primary operational amplifier circuit and a continuous secondary operational amplifier circuit through a voltage division circuit; the utility model discloses be equipped with sensor matching circuit, be equipped with the output of changing different sensor parts, can change different gas sensor at any time, it is more convenient to use, and makes the gas concentration value output of detection accurate, and voltage stabilizing circuit makes the change of sensor end supply voltage reduce signal output's range of variation, on the other hand, the utility model discloses be equipped with wireless mobile communication module, with controller radio communication, the effectual short circuit and the problem of signal interference who leads to of circuit process of having solved.
Description
Technical Field
The utility model relates to a measure technical field, specifically be an anti-interference, wireless communication gas detector.
Background
The gas alarm system is mainly used in industrial environment, when combustible or toxic gas leaks and the gas alarm system detects that the gas concentration reaches the critical point set by the explosion or toxic alarm, the alarm can send out an alarm signal to remind the worker to take safety measures.
The design of the gas detector on the market at present has the following two aspects that are not perfect:
on one hand, after the sensors for detecting different gases are replaced, no corresponding sensor matching circuit is matched with the sensors, so that the output of the concentration value of the detected gas is not accurate enough, the change amplitude of the signal output is large due to the change of the power supply voltage of the sensor end, and the judgment of the alarm module is influenced;
on the other hand, more than ninety percent of controllers in the current market are communicated with the detector through RS485, and because the controllers and the detector are arranged differently, the controllers are generally arranged in a monitoring room, the detector is arranged in a production workshop, and the controllers and the detector are communicated through RS485, the problem of line fault is easily caused;
the prior art can not meet the requirements of people at the present stage, and the prior art is urgently needed to be reformed based on the current situation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an anti-interference, radio communication gas detector to solve the problem that proposes among the above-mentioned background art.
The utility model provides an anti-interference and wireless communication gas detector, which comprises a far-end man-machine interaction module, a controller, a detector and an alarm module;
the remote human-computer interaction module mainly comprises: alarm management module, alarm output control module and interface management module.
The controller mainly includes: the controller is also provided with a key module for checking recorded data information, turning off a buzzer and an LED indicator lamp for alarming, the controller is internally provided with a storage flash for storing data, reading or writing alarm records in the storage flash, and recovering the data of the key storage area from a backup area;
the controller is internally provided with a wireless radio frequency communication module (model NRF24L01), and a low noise amplifier, a power amplifier and a clock oscillator are integrated inside the controller.
The controller is provided with a controller power supply module, the controller power supply module is provided with a charging pulse adjusting circuit, the adjusting circuit is provided with an isolation power tube T2, the base electrode of the triode T2 is coupled with the control end of the processor to realize charging control, the charging pulse adjusting circuit is further symmetrically provided with a triode T3 and a triode T4, the base electrode of the triode T3 is coupled with a current limiting resistor R17 to realize charging current limitation, and the base electrode of the triode T4 is coupled with current limiting resistors R20 and R21 to realize charging output short-circuit protection;
the controller power module still is equipped with current measurement and control circuit, current measurement and control circuit is at the output coupling current detection chip U1 of the pulse control circuit that charges, current detection chip U1's positive input, negative input are equipped with diode VD1 and VD2 respectively, the effectual reducer of current measurement and control circuit is at the peak value circuitous effect when input voltage descends, current detection chip U1's output is equipped with the current output control circuit that field effect transistor Q7 series connection sampling resistance R11 constitutes, and current detection chip U1 carries out the detection of two-way electric current through sampling resistance R11, and when no difference input, current detection chip U1 control current output control circuit exports for half of its power supply voltage value, and when supply current increases, the output begins to reduce the output from half of power supply voltage value.
The detector comprises a microcontroller, a sensor module, a signal acquisition module and a wireless mobile communication module.
The signal acquisition module acquires analog signals of different sensors to different gases, and comprises an A/D converter and a rectifier bridge, wherein interference signals can appear when the signals are acquired, and the rectifier bridge carries out anti-interference processing.
The sensor module is provided with a sensor matching circuit, the sensor matching circuit is provided with output ends for replacing different sensor components, the output ends are coupled with a primary operational amplifier circuit and a secondary operational amplifier circuit which are continuous through a voltage dividing circuit, in order to fully match sensors with different working voltage types, the voltage dividing end of the voltage dividing circuit adopts an adjustable voltage dividing resistor, and the primary operational amplifier circuit and the secondary operational amplifier circuit are respectively provided with an adjusting resistor R4 and an adjusting resistor R7 with low resistance and high resistance, so that the concentration value output of gas detected by the sensor is accurate, and the signal output change amplitude caused by the change of the power supply voltage of the sensor end is effectively reduced;
the power supply end of the sensor matching circuit is provided with a voltage stabilizing circuit, the voltage stabilizing circuit is provided with a self-locking switch, the sensor is powered after the detector is powered on for a few seconds, and the sensor is effectively prevented from being burnt out.
The wireless mobile communication module (model WISMO228) comprises a radio frequency circuit and a GSM coordination processor, the radio frequency circuit has the main functions of completing the modulation and demodulation of signals, the GSM coordination processor coordinates radio frequency signals, and in order to prevent the chip working frequency of other parts in the detector from being high and influencing the normal work of the wireless mobile communication module, the noise suppression processing is required to be carried out on the wireless mobile communication module, the wireless mobile communication module is also provided with an anti-jamming circuit, the anti-jamming circuit comprises a digital isolation chip (model NSi8121N1), the anti-jamming circuit also comprises a current regulating circuit, the current regulating circuit is composed of a shunt coil connected in series with a resistor R25, a resistor R26, capacitors C4 and C5, the input end of the current regulating circuit is coupled with the digital isolation chip, and the current regulating circuit carries out further rectification, so that the infrared transmission speed is improved while interference is inhibited;
the anti-interference circuit further comprises an electromagnetic isolator formed by coupling four discharge tubes in a bidirectional bridge manner, the electromagnetic isolator is coupled to the output end of the current regulating circuit, and when a special high-voltage power distribution condition occurs, the electromagnetic isolator can suppress surge voltage and further promote the infrared transmission of the wireless mobile communication module to be smoother;
the alarm module comprises an alarm circuit and an SIM card seat interface circuit; the alarm circuit comprises a VGA (programmable controller), an LED indicator lamp and a buzzer, a control pin of the microcontroller is coupled with a base electrode of the triode through a protective resistor, a collector electrode of the triode is coupled with the VGA, and a control end of the VGA is coupled with the buzzer and the LED indicator lamp; the control end of the VGA is connected with the control switch in parallel and is arranged on the outer side of the detector, and the VGA is a programmable controller and can be turned off through program control and also can be turned off through the switch control.
Alarm circuit is coupled microcontroller and sets up in the detector, and when alarm circuit reported to the police, the buzzer sent harsh chimes of doom's chimes of doom, and the LED pilot lamp is the continuous scintillation, if want to close the warning, can manually close control switch and close the warning, also can close the warning through controller remote control VGA realization.
The SIM card seat interface circuit is coupled with the microcontroller, is arranged in the controller and is used for sending the mobile phone short message to the remote human-computer interaction module, the SIM card seat interface circuit is provided with an electrostatic protection chip SMF05c, and each pin of the SIM card seat is coupled with the microcontroller through the parallel connection electrostatic protection chip.
Has the advantages that:
on the one hand, the utility model discloses be equipped with sensor matching circuit, be equipped with the output of changing different sensor parts, can change different gas sensor at any time, it is more convenient to use, and makes the gas concentration value output of detection accurate, and voltage stabilizing circuit makes the change of sensor end supply voltage reduce signal output's range of variation, on the other hand, the utility model discloses be equipped with wireless mobile communication module, with controller wireless communication, the effectual problem of signal interference who leads to of circuit process of having solved.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a schematic view of the communication structure of the remote human-computer interaction module, the controller and the detector of the present invention;
FIG. 3 is a diagram of an alarm circuit of the present invention;
fig. 4 is a circuit diagram of the wireless rf communication module of the present invention;
FIG. 5 is a circuit diagram of a charge pulse adjusting circuit of the power supply module of the controller of the present invention;
FIG. 6 is a circuit diagram of the current measurement and control circuit of the power supply module of the controller of the present invention;
FIG. 7 is a circuit diagram of the sensor matching circuit and the voltage stabilizing circuit of the present invention;
FIG. 8 is an anti-jamming circuit diagram of the present invention;
fig. 9 is a circuit diagram of the SIM card socket interface of the present invention;
fig. 10 is a schematic structural diagram of the detector of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the utility model provides a field ordinary skilled person does not make all other embodiments that obtain under the creative work prerequisite, all belong to the utility model discloses the scope of protection.
The utility model provides an anti-interference, wireless communication gas detector of following technical scheme, include: the system comprises a remote human-computer interaction module, a controller, a detector and an alarm module;
the remote human-computer interaction module mainly comprises: alarm management module, alarm output control module and interface management module alarm management module carries out record and storage according to alarm information, alarm output control module carries out supervisory control to VGA, LED pilot lamp and bee calling organ output, interface management module includes: the gas concentration information display module, the alarm information display module and the display screen communication module are controlled by a driving program and realize the information display of a graphical interface through the display screen.
Referring to fig. 2 and 4, the controller has an ARM9 processor, the processor receives the gas data sent by the detector and sends the data to the remote human-computer interaction module, the controller also has a display screen for displaying the gas concentration data detected by the detector, and the like, the controller is also provided with a key module for checking the recorded data information and turning off the VGA, turning off the buzzer and giving an alarm by the LED indicator, a storage flash for storing data is provided inside the controller, the storage flash reads or writes the alarm record, and the key storage area data is recovered from the backup area; the controller is also internally provided with a wireless radio frequency communication module (model NRF24L01), a low noise amplifier, a power amplifier, a clock oscillator and the like are integrated in the controller, data transmission integrating transmission and reception can be realized in a local area network, the controller can work together with wireless modules such as Bluetooth and infrared modules in a 2.4GHz frequency band range for communication, the controller can receive data sent by the detector through the wireless radio frequency communication module, and the controller can also transmit the data to a remote human-computer interaction module.
Referring to fig. 5, as the VGA, the display screen, the buzzer, the detector and the like require different driving currents and different maximum powers, a controller power supply module needs to be independently designed to realize power supply during debugging, in order to prevent the charging time from being too long, the controller power supply module is provided with a charging pulse adjusting circuit, the adjusting circuit is provided with an isolation power tube T2, the base of the triode T2 is coupled to the control end of the processor to realize charging control, the charging pulse adjusting circuit is further symmetrically provided with a triode T3 and a triode T4, the base of the triode T3 is coupled to a current limiting resistor R17 to realize charging current limitation, and the base of the triode T4 is coupled to current limiting resistors R20 and R21 to realize charging output short circuit protection;
referring to fig. 6, in order to avoid the occurrence of a short-circuit event when debugging a detector, the controller power supply module is further provided with a current measurement and control circuit, the power supply current of the detector is detected in real time, and the power supply output is timely turned off when a short circuit or an overcurrent occurs, the output end of the current measurement and control circuit is coupled to a current detection chip U1 at the output end of the charging pulse adjusting circuit, the positive input end and the negative input end of the current detection chip U1 are respectively provided with a diode VD1 and a diode VD2, the current measurement and control circuit effectively reduces the peak bypass effect of the device when the input voltage drops, the output end of the current detection chip U1 is provided with a current output control circuit formed by serially connecting a field effect tube Q7 with a sampling resistor R11, the current detection chip U1 detects bidirectional current through the sampling resistor R11, and when no differential input exists, the current detection chip U1 controls the current output control circuit to output as half of the power supply value, when the supply current increases, the output decreases from half the value of the supply voltage.
Referring to fig. 10, the probe includes a microcontroller, a sensor module, a signal acquisition module, and a wireless mobile communication module.
The signal acquisition module acquires analog signals of different sensors to different gases, and comprises an A/D converter and a rectifier bridge, wherein interference signals can appear when the signals are acquired, and the rectifier bridge carries out anti-interference processing.
Referring to fig. 7, in order to make the microcontroller circuit board compatible with different types of sensors, different sensor components may be replaced, the sensor module is provided with a sensor matching circuit, the sensor matching circuit is provided with an output end for replacing different sensor components, the output end is coupled to a continuous primary operational amplifier circuit and a continuous secondary operational amplifier circuit through a voltage dividing circuit, in order to fully match sensors with different operating voltage types, an adjustable voltage dividing resistor is adopted at a voltage dividing end of the voltage dividing circuit, and the primary operational amplifier circuit and the secondary operational amplifier circuit are respectively provided with an adjusting resistor R4 and an adjusting resistor R7 with low resistance and high resistance, so that the output of a gas concentration value detected by the sensor is accurate, and the signal output variation amplitude caused by the variation of the supply voltage at the sensor end is effectively reduced; in order to prevent the detector from starting with a large instantaneous current, a voltage stabilizing circuit is arranged at the power supply end of the sensor matching circuit, the voltage stabilizing circuit is provided with a self-locking switch, the sensor is powered after the detector is powered on for a few seconds, the sensor is effectively prevented from being burnt out, and the working voltage range of the sensor is 2.5V-3.0V, so that the microcontroller is required to work at 3.3V to ensure that the high voltage output to the sensor by the microcontroller does not exceed 3.3V, the input power supply voltage of the microcontroller is 5V, and the voltage stabilizing circuit with the voltage of 5V to 3.3V is coupled with the sensor;
referring to fig. 8, the wireless mobile communication module (model WISMO228), including radio frequency circuits and a GSM coordination processor, the radio frequency circuit has the main functions of completing the modulation and demodulation of signals, the GSM coordination processor coordinates radio frequency signals, in order to prevent the normal operation of the wireless mobile communication module from being affected by the higher working frequency of the chips at other parts in the detector, the noise suppression processing is required to be carried out on the wireless mobile communication module, the wireless mobile communication module is also provided with an anti-jamming circuit, the immunity circuit includes a digital isolation chip (NSi8121N1), the immunity circuit further includes a current regulation circuit, the current regulating circuit is composed of a shunt coil connected in series with a resistor R25, a resistor R26, capacitors C4 and C5, the input end of the current regulating circuit is coupled with the digital isolation chip, and the current regulating circuit carries out further rectification, so that the infrared transmission speed is improved while interference is inhibited; the anti-interference circuit further comprises an electromagnetic isolator formed by coupling four discharge tubes in a bidirectional bridge manner, the electromagnetic isolator is coupled to the output end of the current regulating circuit, and when a special high-voltage power distribution condition occurs, the electromagnetic isolator can suppress surge voltage and further promote the infrared transmission of the wireless mobile communication module to be smoother;
referring to fig. 3, the alarm module includes an alarm circuit and a SIM card socket interface circuit; the alarm circuit comprises a VGA (programmable controller), an LED indicator lamp and a buzzer, a control pin of the microcontroller is coupled with a base electrode of the triode through a protective resistor, a collector electrode of the triode is coupled with the VGA, and a control end of the VGA is coupled with the buzzer and the LED indicator lamp; the control end of the VGA is connected with the control switch in parallel and is arranged on the outer side of the detector, and the VGA is a programmable controller and can be turned off through program control and also can be turned off through the switch control. Alarm circuit is coupled microcontroller and sets up in the detector, and when alarm circuit reported to the police, the buzzer sent harsh chimes of doom's chimes of doom, and the LED pilot lamp is the continuous scintillation, if want to close the warning, can manually close control switch and close the warning, also can close the warning through controller remote control VGA realization.
Referring to fig. 9, the SIM card socket interface circuit is coupled to a microcontroller and disposed in the controller, and configured to send a mobile phone short message to the remote human-computer interaction module, the SIM card socket interface circuit is provided with an electrostatic protection chip SMF05c, each pin of the SIM card socket is coupled to the microcontroller through a parallel connection electrostatic protection chip, the microcontroller sets a DATA interface of the SIM card through a DATA pin connection 17 pin, sets a clock of the SIM card through a CLK pin connection 15 pin, resets the SIM card through a RST pin connection 14 pin, and supplies power to the SIM card through a VDD pin connection 16 pin.
The SIM card interface pin definitions are as shown in the following table:
referring to fig. 1 and 2, in order to reduce the need of replacing the whole circuit board of the sensor when the sensor reaches the service life, the steps are complicated, the sensor module of the present invention is provided with a sensor matching circuit for matching the working voltage of the sensor, so as to directly and rapidly replace the sensor without additionally replacing the circuit board of the sensor, so that the sensor processes and calibrates the detected data in the microcontroller, and transmits the processed data to the detector through the wireless mobile communication module, when the gas concentration detected by the sensor module of the detector is calculated and processed through the microcontroller, when the gas concentration is higher or lower than the preset standard value, the buzzer in the detector sends out alarm sound and the LED indicator continuously flashes to alarm, and transmits the information to the controller through the wireless mobile communication module, and the controller sends the information to the mobile phone of the manager in the form of short message, different detectors have different numbers, and the sent short message also displays the corresponding detector number, so that the alarm position of the detector can be obtained without designing a GPRS positioning module, whether the concentration of the ambient gas where the detector is located is abnormal or not is checked, the economic expense of the GPRS positioning module is saved, a control switch of the detector can be manually and directly closed to stop the alarm module from giving an alarm, and the VGA of the detector can be controlled to stop the alarm of the detector through a remote instruction of a controller, so that the intelligent effect is achieved; and the controller wirelessly receives and sends commands with the wireless mobile communication module of the detector in the local area network through the wireless radio frequency communication module on the one hand, and then controls the detector, on the other hand, the controller wirelessly communicates the remote human-computer interaction module through the module, uploads the processed data information to the remote human-computer interaction module, and displays the data information through the interface management module, and displays the gas concentration detected by the detector in the remote human-computer interaction module in real time.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (4)
1. An anti-jamming, wireless communication gas detector, comprising: the system comprises a microcontroller, a sensor module, a signal acquisition module and a wireless mobile communication module;
the sensor module is provided with a sensor matching circuit, the sensor matching circuit is provided with an output end for replacing different sensor components, and the output end is coupled with a continuous primary operational amplifier circuit and a continuous secondary operational amplifier circuit through a voltage division circuit;
the primary operational amplifier circuit and the secondary operational amplifier circuit are respectively provided with an adjusting resistor R4 and an adjusting resistor R7 with low resistance and high resistance, so that the gas concentration value detected by the sensor is accurately output;
the power supply end of the sensor matching circuit is provided with a voltage stabilizing circuit, the voltage stabilizing circuit is provided with a self-locking switch, and the sensor is powered after the power-on time is suspended for several seconds;
the wireless mobile communication module is provided with an anti-interference circuit, and the anti-interference circuit comprises a digital isolation chip;
the anti-jamming circuit further comprises a current regulating circuit, the current regulating circuit is formed by serially connecting a resistor R25, a resistor R26 and capacitors C4 and C5 through a shunt coil, and the input end of the current regulating circuit is coupled with the digital isolation chip;
the signal acquisition module comprises an A/D converter and a rectifier bridge and is used for acquiring analog signals of different sensors.
2. A tamper-resistant, wireless communication gas detector according to claim 1, wherein: the voltage division end of the voltage division circuit adopts an adjustable voltage division resistor to match with sensors with different working voltage types.
3. A tamper-resistant, wireless communication gas detector according to claim 1, wherein: the anti-jamming circuit further comprises an electromagnetic isolator formed by coupling four discharge tubes in a bidirectional bridge mode, and the electromagnetic isolator is coupled to the output end of the current regulating circuit and can suppress surge voltage.
4. A tamper-resistant, wireless communication gas detector according to claim 1, wherein: the wireless mobile communication module also comprises a radio frequency circuit and a GSM coordination processor; and the number of the first and second electrodes,
the radio frequency circuit realizes the modulation and demodulation of signals, and the GSM coordination processor realizes the coordination of radio frequency signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120269512.3U CN213958228U (en) | 2021-01-29 | 2021-01-29 | Anti-interference and wireless communication gas detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120269512.3U CN213958228U (en) | 2021-01-29 | 2021-01-29 | Anti-interference and wireless communication gas detector |
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| Publication Number | Publication Date |
|---|---|
| CN213958228U true CN213958228U (en) | 2021-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120269512.3U Active CN213958228U (en) | 2021-01-29 | 2021-01-29 | Anti-interference and wireless communication gas detector |
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| CN (1) | CN213958228U (en) |
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2021
- 2021-01-29 CN CN202120269512.3U patent/CN213958228U/en active Active
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