CN111579726A - Multifunctional sensing detection device - Google Patents
Multifunctional sensing detection device Download PDFInfo
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- CN111579726A CN111579726A CN202010506145.4A CN202010506145A CN111579726A CN 111579726 A CN111579726 A CN 111579726A CN 202010506145 A CN202010506145 A CN 202010506145A CN 111579726 A CN111579726 A CN 111579726A
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- 239000001301 oxygen Substances 0.000 claims abstract description 33
- 229910018503 SF6 Inorganic materials 0.000 claims abstract description 32
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
- G01N33/0032—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array using two or more different physical functioning modes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0039—O3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0044—Sulphides, e.g. H2S
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
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Abstract
The invention discloses a multifunctional sensing detection device, which comprises: detection module, communication circuit, microprocessor, storage module, data transmission module, power module, detection module including: the temperature and humidity sensor, the sulfur hexafluoride sensor, the oxygen sensor and the oxygen sensor are connected to the microprocessor through a first communication circuit, a second communication circuit and a third communication circuit respectively, the output end of the ozone sensor is connected to the microprocessor through an AD conversion unit and a fourth communication circuit in sequence, the storage module is electrically connected with the microprocessor, the microprocessor is in communication connection with an external monitoring terminal through a data transmission module, and the power supply module is used for supplying power to the device. The invention enriches the functions of the detection device, reduces the volume of the device and improves the electromagnetic compatibility of the detection device.
Description
Technical Field
The invention relates to the technical field of sensing detection, in particular to a multifunctional sensing detection device.
Background
The ring main unit of the power distribution room usually adopts sulfur hexafluoride gas as insulating gas of high-voltage switch equipment, and once sulfur hexafluoride gas and decomposition products thereof are deposited in the relatively closed power distribution room to cause local oxygen deficiency in case of leakage in the operation process, so that great harm is generated to inspection and maintenance personnel. The discharging phenomenon caused by the deterioration of the insulator in the power distribution room consumes oxygen and generates ozone, so that whether the discharging phenomenon exists in the switch cabinet can be indirectly monitored by detecting the concentration change of the ozone and the oxygen, and the evaluation on the insulating state in the switch cabinet is achieved. The temperature index in the power distribution room has serious influence on the operation of power supply equipment, equipment joints such as a busbar joint, an isolation switch or a contact, a transformer low-voltage wire outlet and the like of a high-voltage cabinet are sensitive parts which generate heat, the insulation of the equipment joints is reduced due to overhigh or overlow temperature, so that equipment is damaged, the same negative influence on the equipment is also caused by the environment humidity, and the electric leakage phenomenon of the equipment is caused due to overhigh humidity in the power distribution room. Therefore, in the operation process of the power distribution room, the concentrations of sulfur hexafluoride, oxygen, ozone and other gases in the power distribution room need to be detected constantly, and meanwhile, the temperature and the humidity in the environment are combined to perform comprehensive analysis, so that the operation condition of the power distribution room is obtained, the equipment operation management level of the power distribution room is further improved, and the intelligent upgrading and transformation of the power distribution room are promoted. However, the existing sensors in the power distribution room are generally designed in a single-purpose mode, one sensor only carries out measurement and monitoring on a single object, and the sensors are large in size and inconvenient to install. In addition, the existing sensor has the problems of short service life, low precision, need of manual power failure to return to the factory for correction and the like. These problems lead to increased maintenance costs and difficulties for intelligent power distribution rooms.
In the prior art, the publication numbers are: the invention patent of CN110658241A discloses a multi-gas detection device, which comprises a core processing unit, and a sensor data acquisition unit, an energy management unit, a man-machine interaction unit, an alarm unit and a communication interface unit which are connected with the core processing unit, wherein the sensor data acquisition unit comprises an electrochemical gas sensor, a double-gas sensor module and a temperature and humidity sensor module, and the electrochemical gas sensor mainly comprises a gas sensor, a signal conditioning circuit and an AD chip; the energy management unit mainly comprises a microcontroller, a DC-DC chip and an MOS (metal oxide semiconductor) tube and is responsible for power control, energy management and real-time timing of the whole device; the human-computer interaction unit comprises a liquid crystal display screen and a self-recovery key; the alarm unit mainly comprises a high-brightness LED lamp, a buzzer and a vibration motor; the communication unit is composed of an IrDA module. Although the invention patent integrates a plurality of gas detection sensors, the invention patent is an independent detection device, the detection is only limited to gas detection, and the invention has no data storage function.
Disclosure of Invention
The invention provides a multifunctional sensing detection device for overcoming the defects of single function, large volume and low electromagnetic compatibility of the sensing detection device of a power distribution room in the prior art.
The primary objective of the present invention is to solve the above technical problems, and the technical solution of the present invention is as follows:
a multi-functional sensing device, comprising: detection module, communication circuit, microprocessor, storage module, data transmission module, power module, detection module including: temperature and humidity sensor, sulfur hexafluoride sensor, oxygen sensor, ozone sensor, communication circuit includes: the output end of the temperature and humidity sensor is connected to the microprocessor through the first communication circuit, the output end of the sulfur hexafluoride sensing device is connected to the microprocessor through the second communication circuit, the output end of the oxygen sensor is connected to the microprocessor through the third communication circuit, the output end of the ozone sensor is connected to the microprocessor through the AD conversion unit and the fourth communication circuit in sequence, the storage module is electrically connected with the microprocessor, the microprocessor is in communication connection with an external monitoring terminal through the data transmission module, and the power supply module is used for supplying power to the device.
In this scheme, power module including: the first voltage reduction unit, the second voltage reduction unit and the isolator have the following specific connection relations: external direct current input voltage is connected to the input end of the first voltage reduction unit through a power interface, the output end of the first voltage reduction unit is connected to the power input end of the detection module, the input end of the second voltage reduction unit and the input end of the isolator respectively, the output end of the second voltage reduction unit is connected to the power input end of the microprocessor, and the output end of the isolator is connected to the power input end of the data transmission module.
In this scheme, the isolator is a magnetic coupling isolated digital isolator.
In this scheme, the storage module is an EEPROM storage module.
In this scheme, the data transmission module includes: the wireless transmission unit is electrically connected with the microprocessor and is in wireless communication connection with an external monitoring terminal, and the 485 wired communication unit is in wired communication connection with the microprocessor and the external monitoring terminal.
In the scheme, the wireless transmission module is a ZigBee wireless transmission module.
In this scheme, first communication circuit including: the temperature and humidity sensor is HTU21DY, and is marked as U17, and the connection relation between the temperature and humidity sensor and the first communication circuit is as follows: one end of the resistor R20 is connected to 3.3V direct-current voltage, the other end of the resistor R20 is connected to a control line terminal of a temperature and humidity sensor U17, one end of the resistor R29 is connected to 3.3V direct-current voltage, the other end of the resistor R29 is connected to a data line terminal of the U17, one end of the capacitor C28 is connected to a power supply terminal VDD and 3.3V direct-current voltage of the temperature and humidity sensor U17, the other end of the capacitor C28 is connected to a grounding terminal of the temperature and humidity sensor U17, a grounding terminal and a PAD terminal of the temperature and humidity sensor U17 are both grounded, and the control line terminal and the data line.
In this aspect, the second communication circuit includes: the transient diode TVS, the capacitor C32, the capacitor C33, the sulfur hexafluoride sensor WFS-S1-SYD, which is marked as P7, and the connection relationship between the sulfur hexafluoride sensor and the second communication circuit is as follows: one end of the transient diode TVS, one end of the capacitor C32 and one end of the capacitor C33 are all connected to a power supply end of a sulfur hexafluoride sensor P7, the other end of the transient diode TVS, the other end of the capacitor C32 and the other end of the capacitor C33 are connected to a grounding end of the sulfur hexafluoride sensor, the grounding end of the sulfur hexafluoride sensor is grounded, the power supply end of the sulfur hexafluoride sensor is connected to 5V direct-current voltage, and a data sending end TXD and a data receiving end RXD of the sulfur hexafluoride sensor are all connected to the microprocessor.
In this scheme, the third communication circuit includes: the capacitance C29, C30, the oxygen sensor is LOX-02, note as P5, the connection relation of oxygen sensor and third communication circuit is: one end of the capacitor C29 and one end of the capacitor C30 are both connected to a power supply end of the oxygen sensor P5, the other end of the capacitor C29 and the other end of the capacitor C30 are both connected to a grounding end of the oxygen sensor P5, the power supply end of the oxygen sensor P5 is connected to 5V direct current voltage, the grounding end of the oxygen sensor P5 is both grounded, and a data sending end TXD and a data receiving end RXD of the oxygen sensor P5 are both connected to the microprocessor.
In this embodiment, the fourth communication circuit includes: resistors R8, R21, R22, R23, R24, R25, R26, R53 and R52, capacitors C55, C56, C57, C58, C59, capacitors TC10, TC11, TC12 and TC13, a MOS transistor Q, an analog front-end chip LMP91000 and a chip U15, an ozone sensor P6, an AD conversion unit is an analog-to-digital conversion chip ADC161S626CIMM and a chip U16, and the connection relationship between the fourth communication circuit and the ozone sensor and the AD conversion unit is as follows: one end of the resistor R22, one end of the resistor R52 and one end of the resistor R53 are all connected to a power supply terminal VDD, the other end of the resistor R22, the other end of the resistor R52 and the other end of the resistor R53 are respectively connected to a 2 nd pin, a 3 rd pin and a 4 th pin of an analog front-end chip U15, one end of the capacitor C58 is respectively connected to the power supply terminal VDD and a 6 th pin of the analog front-end chip U15, the other end of the capacitor C58 is respectively connected to a 7 th pin, a 15 th pin and ground of the analog front-end chip U15, a 14 th pin and a 13 th pin of the analog front-end chip U15 are respectively connected to a 5 th pin and a 6 th pin of an ozone sensor P6, a 12 th pin of the analog front-end chip U15 is connected to a 6 th pin and a 1 st pin of an ozone sensor P6, a resistor R8 is connected in series between the 14 th pin and the 13 th pin of the analog front-end chip U15, the other end of the resistor R21 is connected to the gate of the MOS tube Q, the drain of the MOS tube Q is connected to the 13 th pin of the analog front-end chip U15, the source of the MOS tube Q is connected to the 12 th pin of the analog front-end chip U15, the 11 th pin of the analog front-end chip U15 is connected to the anode of the capacitor TC13, the anode of the capacitor TC11, one end of the capacitor C55 and the 1 st pin of the analog-to-digital conversion chip U16 respectively, the cathode of the capacitor TC13 is grounded, the cathode of the capacitor TC11 and the other end of the capacitor C55 are connected to the 4 th pin of the analog-to-digital conversion chip U16 and grounded respectively, the 10 th pin of the analog front-end chip U15 is connected to one end of the capacitor C57 and one end of the resistor R23 respectively, the other end of the capacitor C57 and the other end of the resistor R23 are connected to the 9 th pin of the analog front-to the analog front-end chip U15 respectively, the 8 th pin of the analog front-end chip U, The second pin 2 of the analog-to-digital conversion chip U16, the other end of the capacitor C60 is connected to one end of the resistor R25 and the 3 rd pin of the analog-to-digital conversion chip U16, the other end of the resistor R25 is connected to a reference voltage end, the 10 th pin of the analog-to-digital conversion chip U16 is connected to one end of the capacitor C56, the anode of the capacitor TC, and the 5V dc voltage, the other end of the capacitor C56 and the cathode of the capacitor TC are grounded, the 9 th pin of the analog-to-digital conversion chip U16 is connected to one end of the capacitor C59, the anode of the capacitor TC12, and the 3.3V dc voltage, the other end of the capacitor C59 and the cathode of the capacitor TC12 are grounded, the 5 th pin of the analog-to-digital conversion chip U16 is grounded, the 8 th pin and the 6 th pin of the analog-to-digital conversion chip U16 are connected.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the invention enriches the functions of the detection device by arranging the detection modules of the multiple sensors, reduces the volume of the device by modular design, and improves the electromagnetic compatibility of the detection device by adopting the power supply module with isolation.
Drawings
Fig. 1 is a schematic diagram of a multifunctional sensing device of the present invention.
FIG. 2 is a schematic diagram of a first communication circuit according to the present invention.
FIG. 3 is a schematic diagram of a second communication circuit according to the present invention.
FIG. 4 is a schematic diagram of a third communication circuit according to the present invention.
FIG. 5 is a schematic diagram of a fourth communication circuit according to the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Example 1
As shown in fig. 1, a multifunctional sensing and detecting device includes: detection module, communication circuit, microprocessor, storage module, data transmission module, power module, detection module including: temperature and humidity sensor, sulfur hexafluoride sensor, oxygen sensor, ozone sensor, communication circuit includes: the output end of the temperature and humidity sensor is connected to the microprocessor through the first communication circuit, the output end of the sulfur hexafluoride sensing device is connected to the microprocessor through the second communication circuit, the output end of the oxygen sensor is connected to the microprocessor through the third communication circuit, the output end of the ozone sensor is connected to the microprocessor through the AD conversion unit and the fourth communication circuit in sequence, the storage module is electrically connected with the microprocessor, the microprocessor is in communication connection with an external monitoring terminal through the data transmission module, and the power supply module is used for supplying power to the device.
According to the invention, gas concentration data and temperature and humidity data are obtained through a sensor of a detection module, and are transmitted to a microprocessor, the microprocessor sends the obtained gas concentration data and temperature and humidity data to an external monitoring terminal by using a data transmission module, and simultaneously stores the obtained gas concentration data and temperature and humidity data to a storage module, and the external monitoring terminal can give a prompt whether the gas concentration data and the temperature and humidity data exceed a threshold value according to a preset gas concentration threshold value and a preset temperature and humidity threshold value.
The sulfur hexafluoride sensor is based on a non-dispersive infrared principle, the oxygen sensor is based on a fluorescence quenching principle, and the ozone sensor is based on an electrochemical principle of a screen printing technology.
In this scheme, power module including: the first voltage reduction unit, the second voltage reduction unit and the isolator have the following specific connection relations: external direct current input voltage is connected to the input end of the first voltage reduction unit through a power interface, the output end of the first voltage reduction unit is connected to the power input end of the detection module, the input end of the second voltage reduction unit and the input end of the isolator respectively, the output end of the second voltage reduction unit is connected to the power input end of the microprocessor, and the output end of the isolator is connected to the power input end of the data transmission module.
In a specific embodiment, the external DC input voltage is a 24V DC input voltage, the first voltage reduction unit is a DC/DC 24V-to-5V voltage reduction unit, the first voltage reduction unit converts the 24V DC input voltage into a DC5V voltage, the 5V voltage output by the first voltage reduction unit supplies power to the detection module all the way, the other way is input to the second voltage reduction unit, the other way is input to the isolator, the second voltage reduction unit is a DC/DC 5V-to-3.3V voltage reduction unit, the DC 3.3V voltage obtained after voltage reduction by the second voltage reduction unit supplies power to the microprocessor, and the other way of voltage passing through the isolator supplies power to the 485 wired module.
In this scheme, the isolator is a magnetic coupling isolated digital isolator. The digital isolator adopting the magnetic coupling isolation technology can effectively improve the electromagnetic compatibility of the circuit so as to meet the application requirement of the integrated sensor in a power distribution room.
In this scheme, the data transmission module includes: the wireless transmission unit is electrically connected with the microprocessor and is in wireless communication connection with an external monitoring terminal, and the 485 wired communication unit is in wired communication connection with the microprocessor and the external monitoring terminal. In a specific embodiment, the data transmission module transmits the detected concentration information of the gas in the air of the power distribution room and the temperature and humidity information to the external monitoring terminal. The operator can check the real-time information of the gas concentration from the monitoring terminal, and judge whether the gas concentration and the temperature and humidity exceed a set range so as to achieve the purpose of monitoring the running state of the power distribution room in real time.
In this scheme, the storage module is an EEPROM storage module. Data caching and storage are realized through the EEPROM storage module, so that data loss after sudden power failure is prevented.
In the scheme, the wireless transmission module is a ZigBee wireless transmission module.
As shown in fig. 2, in this embodiment, the first communication circuit includes: the temperature and humidity sensor is HTU21DY, and is marked as U17, and the connection relation between the temperature and humidity sensor and the first communication circuit is as follows: one end of the resistor R20 is connected to 3.3V direct-current voltage, the other end of the resistor R20 is connected to a control line terminal of a temperature and humidity sensor U17, one end of the resistor R29 is connected to 3.3V direct-current voltage, the other end of the resistor R29 is connected to a data line terminal of the U17, one end of the capacitor C28 is connected to a power supply terminal VDD and 3.3V direct-current voltage of the temperature and humidity sensor U17, the other end of the capacitor C28 is connected to a grounding terminal of the temperature and humidity sensor U17, a grounding terminal and a PAD terminal of the temperature and humidity sensor U17 are both grounded, and the control line terminal and the data line.
As shown in fig. 3, in this embodiment, the second communication circuit includes: the transient diode TVS, the capacitor C32, the capacitor C33, the sulfur hexafluoride sensor WFS-S1-SYD, which is marked as P7, and the connection relationship between the sulfur hexafluoride sensor and the second communication circuit is as follows: one end of the transient diode TVS, one end of the capacitor C32 and one end of the capacitor C33 are all connected to a power supply end of a sulfur hexafluoride sensor P7, the other end of the transient diode TVS, the other end of the capacitor C32 and the other end of the capacitor C33 are connected to a grounding end of the sulfur hexafluoride sensor, the grounding end of the sulfur hexafluoride sensor is grounded, the power supply end of the sulfur hexafluoride sensor is connected to 5V direct-current voltage, and a data sending end TXD and a data receiving end RXD of the sulfur hexafluoride sensor are all connected to the microprocessor.
As shown in fig. 4, in this embodiment, the third communication circuit includes: the capacitance C29, C30, the oxygen sensor is LOX-02, note as P5, the connection relation of oxygen sensor and third communication circuit is: one end of the capacitor C29 and one end of the capacitor C30 are both connected to a power supply end of the oxygen sensor P5, the other end of the capacitor C29 and the other end of the capacitor C30 are both connected to a grounding end of the oxygen sensor P5, a power supply end of the oxygen sensor P5 is connected to 5V direct current voltage, a grounding end of the oxygen sensor P5 is both grounded, and a data sending end TXD and a data receiving end RXD of the oxygen sensor P5 are both connected to the microprocessor.
As shown in fig. 5, in this embodiment, the fourth communication circuit includes: resistors R8, R21, R22, R23, R24, R25, R26, R53 and R52, capacitors C55, C56, C57, C58, C59, capacitors TC10, TC11, TC12 and TC13, a MOS transistor Q, an analog front-end chip LMP91000 and a chip U15, an ozone sensor P6, an AD conversion unit is an analog-to-digital conversion chip ADC161S626CIMM and a chip U16, and the connection relationship between the fourth communication circuit and the ozone sensor and the AD conversion unit is as follows: one end of the resistor R22, one end of the resistor R52 and one end of the resistor R53 are all connected to a power supply terminal VDD, the other end of the resistor R22, the other end of the resistor R52 and the other end of the resistor R53 are respectively connected to a 2 nd pin, a 3 rd pin and a 4 th pin of an analog front-end chip U15, one end of the capacitor C58 is respectively connected to the power supply terminal VDD and a 6 th pin of the analog front-end chip U15, the other end of the capacitor C58 is respectively connected to a 7 th pin, a 15 th pin and ground of the analog front-end chip U15, a 14 th pin and a 13 th pin of the analog front-end chip U15 are respectively connected to a 5 th pin and a 6 th pin of an ozone sensor P6, a 12 th pin of the analog front-end chip U15 is connected to a 6 th pin and a 1 st pin of an ozone sensor P6, a resistor R8 is connected in series between the 14 th pin and the 13 th pin of the analog front-end chip U15, the other end of the resistor R21 is connected to the gate of the MOS tube Q, the drain of the MOS tube Q is connected to the 13 th pin of the analog front-end chip U15, the source of the MOS tube Q is connected to the 12 th pin of the analog front-end chip U15, the 11 th pin of the analog front-end chip U15 is connected to the anode of the capacitor TC13, one end of the anode capacitor C55 of the capacitor TC11 and the 1 st pin of the analog-to-digital conversion chip U16 respectively, the cathode of the capacitor TC13 is grounded, the cathode of the capacitor TC11 and the other end of the capacitor C55 are connected to the 4 th pin of the analog-to-digital conversion chip U16 and grounded respectively, the 10 th pin of the analog front-end chip U15 is connected to one end of the capacitor C57 and one end of the resistor R23 respectively, the other end of the capacitor C57 and the other end of the resistor R23 are connected to the 9 th pin of the analog front-end chip U15 respectively, the 8 th pin of the analog front-to one end chip U15 and the, The second pin 2 of the analog-to-digital conversion chip U16, the other end of the capacitor C60 is connected to one end of the resistor R25 and the 3 rd pin of the analog-to-digital conversion chip U16, the other end of the resistor R25 is connected to a reference voltage end, the 10 th pin of the analog-to-digital conversion chip U16 is connected to one end of the capacitor C56, the anode of the capacitor TC, and the 5V dc voltage, the other end of the capacitor C56 and the cathode of the capacitor TC are grounded, the 9 th pin of the analog-to-digital conversion chip U16 is connected to one end of the capacitor C59, the anode of the capacitor TC12, and the 3.3V dc voltage, the other end of the capacitor C59 and the cathode of the capacitor TC12 are grounded, the 5 th pin of the analog-to-digital conversion chip U16 is grounded, the 8 th pin and the 6 th pin of the analog-to-digital conversion chip U16 are connected.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A multifunctional sensing device, comprising: detection module, communication circuit, microprocessor, storage module, data transmission module, power module, detection module including: temperature and humidity sensor, sulfur hexafluoride sensor, oxygen sensor, ozone sensor, communication circuit includes: the output end of the temperature and humidity sensor is connected to the microprocessor through the first communication circuit, the output end of the sulfur hexafluoride sensing device is connected to the microprocessor through the second communication circuit, the output end of the oxygen sensor is connected to the microprocessor through the third communication circuit, the output end of the ozone sensor is connected to the microprocessor through the AD conversion unit and the fourth communication circuit in sequence, the storage module is electrically connected with the microprocessor, the microprocessor is in communication connection with an external monitoring terminal through the data transmission module, and the power supply module is used for supplying power to the device.
2. The multi-functional sensing and detection device of claim 1, wherein the power module comprises: the first voltage reduction unit, the second voltage reduction unit and the isolator have the following specific connection relations: external direct current input voltage is connected to the input end of the first voltage reduction unit through a power interface, the output end of the first voltage reduction unit is connected to the power input end of the detection module, the input end of the second voltage reduction unit and the input end of the isolator respectively, the output end of the second voltage reduction unit is connected to the power input end of the microprocessor, and the output end of the isolator is connected to the power input end of the data transmission module.
3. The multi-functional sensing detection device of claim 2, wherein the isolator is a magnetically coupled isolated digital isolator.
4. The multi-functional sensing detection device of claim 1, wherein the memory module is an EEPROM memory module.
5. The multifunctional sensing and detecting device according to claim 1, wherein the data transmission module comprises: the wireless transmission unit is electrically connected with the microprocessor and is in wireless communication connection with an external monitoring terminal, and the 485 wired communication unit is in wired communication connection with the microprocessor and the external monitoring terminal.
6. The multifunctional sensing device of claim 5, wherein the wireless transmission module is a ZigBee wireless transmission module.
7. The multi-functional sensing and detecting device of claim 1, wherein the first communication circuit comprises: the temperature and humidity sensor is HTU21DY, and is marked as U17, and the connection relation between the temperature and humidity sensor and the first communication circuit is as follows: one end of the resistor R20 is connected to 3.3V direct-current voltage, the other end of the resistor R20 is connected to a control line terminal of a temperature and humidity sensor U17, one end of the resistor R29 is connected to 3.3V direct-current voltage, the other end of the resistor R29 is connected to a data line terminal of the U17, one end of the capacitor C28 is connected to a power supply terminal VDD and 3.3V direct-current voltage of the temperature and humidity sensor U17, the other end of the capacitor C28 is connected to a grounding terminal of the temperature and humidity sensor U17, a grounding terminal and a PAD terminal of the temperature and humidity sensor U17 are both grounded, and the control line terminal and the data line.
8. The multi-functional sensing detection device of claim 1, wherein the second communication circuit comprises: the transient diode TVS, the capacitor C32, the capacitor C33, the sulfur hexafluoride sensor WFS-S1-SYD, which is marked as P7, and the connection relationship between the sulfur hexafluoride sensor and the second communication circuit is as follows: one end of the transient diode TVS, one end of the capacitor C32 and one end of the capacitor C33 are all connected to a power supply end of a sulfur hexafluoride sensor P7, the other end of the transient diode TVS, the other end of the capacitor C32 and the other end of the capacitor C33 are connected to a grounding end of the sulfur hexafluoride sensor, the grounding end of the sulfur hexafluoride sensor is grounded, the power supply end of the sulfur hexafluoride sensor is connected to 5V direct-current voltage, and a data sending end TXD and a data receiving end RXD of the sulfur hexafluoride sensor are all connected to the microprocessor.
9. The multi-functional sensing and detection device of claim 1, wherein the third communication circuit comprises: the capacitance C29, C30, the oxygen sensor is LOX-02, note as P5, the connection relation of oxygen sensor and third communication circuit is: one end of the capacitor C29 and one end of the capacitor C30 are both connected to a power supply end of the oxygen sensor P5, the other end of the capacitor C29 and the other end of the capacitor C30 are both connected to a grounding end of the oxygen sensor P5, the power supply end of the oxygen sensor P5 is connected to 5V direct current voltage, the grounding end of the oxygen sensor P5 is both grounded, and a data sending end TXD and a data receiving end RXD of the oxygen sensor P5 are both connected to the microprocessor.
10. The multi-functional sensing and detection device of claim 1, wherein the fourth communication circuit comprises: resistors R8, R21, R22, R23, R24, R25, R26, R53 and R52, capacitors C55, C56, C57, C58, C59, capacitors TC10, TC11, TC12 and TC13, a MOS transistor Q, an analog front-end chip LMP91000 and a chip U15, an ozone sensor P6, an AD conversion unit is an analog-to-digital conversion chip ADC161S626CIMM and a chip U16, and the connection relationship between the fourth communication circuit and the ozone sensor and the AD conversion unit is as follows: one end of the resistor R22, one end of the resistor R52 and one end of the resistor R53 are all connected to a power supply terminal VDD, the other end of the resistor R22, the other end of the resistor R52 and the other end of the resistor R53 are respectively connected to a 2 nd pin, a 3 rd pin and a 4 th pin of an analog front-end chip U15, one end of the capacitor C58 is respectively connected to the power supply terminal VDD and a 6 th pin of the analog front-end chip U15, the other end of the capacitor C58 is respectively connected to a 7 th pin, a 15 th pin and ground of the analog front-end chip U15, a 14 th pin and a 13 th pin of the analog front-end chip U15 are respectively connected to a 5 th pin and a 6 th pin of an ozone sensor P6, a 12 th pin of the analog front-end chip U15 is connected to a 6 th pin and a 1 st pin of an ozone sensor P6, a resistor R8 is connected in series between the 14 th pin and the 13 th pin of the analog front-end chip U15, the other end of the resistor R21 is connected to the gate of the MOS tube Q, the drain of the MOS tube Q is connected to the 13 th pin of the analog front-end chip U15, the source of the MOS tube Q is connected to the 12 th pin of the analog front-end chip U15, the 11 th pin of the analog front-end chip U15 is connected to the anode of the capacitor TC13, the anode of the capacitor TC11, one end of the capacitor C55 and the 1 st pin of the analog-to-digital conversion chip U16 respectively, the cathode of the capacitor TC13 is grounded, the cathode of the capacitor TC11 and the other end of the capacitor C55 are connected to the 4 th pin of the analog-to-digital conversion chip U16 and grounded respectively, the 10 th pin of the analog front-end chip U15 is connected to one end of the capacitor C57 and one end of the resistor R23 respectively, the other end of the capacitor C57 and the other end of the resistor R23 are connected to the 9 th pin of the analog front-to the analog front-end chip U15 respectively, the 8 th pin of the analog front-end chip U, The second pin 2 of the analog-to-digital conversion chip U16, the other end of the capacitor C60 is connected to one end of the resistor R25 and the 3 rd pin of the analog-to-digital conversion chip U16, the other end of the resistor R25 is connected to a reference voltage end, the 10 th pin of the analog-to-digital conversion chip U16 is connected to one end of the capacitor C56, the anode of the capacitor TC, and the 5V dc voltage, the other end of the capacitor C56 and the cathode of the capacitor TC are grounded, the 9 th pin of the analog-to-digital conversion chip U16 is connected to one end of the capacitor C59, the anode of the capacitor TC12, and the 3.3V dc voltage, the other end of the capacitor C59 and the cathode of the capacitor TC12 are grounded, the 5 th pin of the analog-to-digital conversion chip U16 is grounded, the 8 th pin and the 6 th pin of the analog-to-digital conversion chip U16 are connected.
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