CN109115962A - Air detection instrument with positioning function - Google Patents
Air detection instrument with positioning function Download PDFInfo
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- CN109115962A CN109115962A CN201811139005.7A CN201811139005A CN109115962A CN 109115962 A CN109115962 A CN 109115962A CN 201811139005 A CN201811139005 A CN 201811139005A CN 109115962 A CN109115962 A CN 109115962A
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- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 239000003990 capacitor Substances 0.000 claims description 75
- 230000003321 amplification Effects 0.000 claims description 23
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 23
- 230000000087 stabilizing effect Effects 0.000 claims description 20
- 230000003750 conditioning effect Effects 0.000 claims description 19
- 230000005611 electricity Effects 0.000 claims description 18
- 239000004065 semiconductor Substances 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 12
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 9
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 5
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- 238000011161 development Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
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Abstract
Air detection instrument disclosed by the invention with positioning function, including shell, display screen, key and indicator light are provided on the shell, the side of the shell is provided with the air-guiding aisle through shell, sensor group is provided on the inner wall of the air-guiding aisle, circuit board is provided in the shell, the display screen, key, indicator light and sensor group distinguish circuit board electrical connection；The present invention can be accurately positioned air detection instrument, realize the long-range monitoring of staff, improve work efficiency, save manpower and material resources, have extremely strong practicability.
Description
Technical field
The invention belongs to the technical fields of air detection instrument, and in particular to the air detection instrument with positioning function.
Background technique
With the development of economy with the raising of living standards of the people, people to daily inhabitation, activity, workplace environment
Also more and more pay attention to, make every effort to inhabitation, activity and the working environment that creation is more comfortable, healthy.But with the development of industry, to sky
The pollution of gas is also increasingly severe, the air quality degradation in some places, is unfavorable for the health of people, thus needs
Air quality is accurately measured, then according to measurement result, implements effective precautionary measures or Improving Measurements；Currently, existing
The portable air quality detector having, generally existing measurement has a single function, detection accuracy is lower, measurement error is biggish
Problem will test environmental index, generally require to carry more test equipments, measurement environmental index is not accurate enough, in addition, detecting
When Outdoor Air Quality, staff is needed to operate for a long time in outdoor, it is time-consuming and laborious.
Summary of the invention
The present invention overcomes the shortcomings of the prior art, technical problem to be solved are as follows: a kind of measurement accuracy height is provided,
And the air detection instrument with positioning function.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows: the air detection instrument with positioning function,
Including shell, display screen, key and indicator light are provided on the shell, the side of the shell is provided with leading through shell
Wind channel is provided with sensor group on the inner wall of the air-guiding aisle, is provided with circuit board in the shell, the display screen,
Key, indicator light and sensor group distinguish circuit board electrical connection；
Be provided on the circuit board signal conditioning circuit, filter amplification circuit, A/D converter circuit, single-chip microcontroller, positioning circuit and
The input terminal of telecommunication circuit, the signal conditioning circuit is electrically connected with sensor group, the output end of the signal conditioning circuit with
The input terminal of filter amplification circuit is connected, and the output end of filter amplification circuit is connected with the input terminal of A/D converter circuit, AD conversion
The output end of circuit is connected with the input terminal of single-chip microcontroller, and positioning circuit is connected with the input terminal of single-chip microcontroller, the output end of single-chip microcontroller
It is connect by telecommunication circuit with background monitoring center to center communications.
It preferably, further include power supply module, the power supply module includes: solar panel, anti-surge circuit, charging electricity
Road, voltage regulator circuit, current foldback circuit and battery, the solar panel pass sequentially through anti-surge circuit, charging circuit,
Voltage regulator circuit, current foldback circuit are electrically connected with battery, and the battery is electrically connected with the input terminal of single-chip microcontroller.
Preferably, the anti-surge circuit include capacitor C5, capacitor C6, resistance R7, resistance R8, resistance R9, resistance R10,
Metal-oxide-semiconductor Q3；Charging circuit includes triode Q4, triode Q5, rectifier bridge T2；Voltage regulator circuit includes voltage stabilizing chip U1, inductance L4；
Current foldback circuit includes triode Q6, triode Q7；
One end of the capacitor C5 is connected with the output plus terminal of the anode of diode D2, solar panel respectively, diode D2
Cathode be connected respectively with the source electrode of one end of resistance R7, metal-oxide-semiconductor Q3, diode D1 is attempted by source electrode and the drain electrode of metal-oxide-semiconductor Q3
Both ends, resistance R11 are attempted by diode D1, the drain electrode of metal-oxide-semiconductor Q3 respectively with one end of resistance R9, capacitor C6 one end,
One end of capacitor C7, one end of resistance R12, one end of resistance R15, transformer T1 coil L1 one end be connected, transformer T1
The other end of coil L1 be connected respectively with the collector of the other end of resistance R15, triode Q5, the base stage difference of triode Q5
It is connected with the collector of the other end of resistance R12, one end of resistance R13, triode Q4, the other end serial capacitance of resistance R13
One end of coil L2 after C8 with transformer T1 is connected, the transmitting with triode Q5 respectively of the other end of the coil L2 of transformer T1
Pole, one end of resistance R14, the emitter of triode Q4, the other end of capacitor C7, the other end of capacitor C6, resistance R10 one
End, the grid of metal-oxide-semiconductor Q3, one end of resistance R8, the other end of capacitor C5, the output negative terminal of solar panel (6) are connected, electricity
The other end of resistance R8 is connected with the other end of resistance R7, and the other end of resistance R10 is connected with the other end of resistance R9, transformer T1
Coil L3 be attempted by rectifier bridge T2 input anode, input negative terminal both ends；
The other end of resistance R14 is connected with the anode of the base stage of triode Q4, diode D3 respectively, the cathode difference of diode D3
Be connected with one end of one end of resistance R16, resistance R17, the other end of resistance R16 respectively with the output plus terminal of rectifier bridge T2, electricity
Hold one end of C9, one end of capacitor C10, one end of capacitor C11, one end of inductance L4, one end of resistance R18, voltage stabilizing chip U1
The end IN be connected, the other end of resistance R18 is connected with the end EN of voltage stabilizing chip U1, the output negative terminal of rectifier bridge T2 respectively with resistance
The other end of R17, the other end of capacitor C9, the other end of capacitor C10, the other end of capacitor C11, voltage stabilizing chip U1 the end GND,
One end of resistance R19, one end of capacitor C12, one end of capacitor C13, one end of resistance R24, the input negative terminal of battery are connected,
The end SW of voltage stabilizing chip U1 is connected with the anode of the other end of inductance L4, diode D4 respectively, the cathode of diode D4 respectively with
One end of resistance R20, the other end of capacitor C12, the other end of capacitor C13, one end of fuse F1 are connected, and resistance R20's is another
One end is connected with the other end of the end FB of voltage stabilizing chip U1, resistance R19 respectively, and the other end and diode D5 of fuse F1 is just
Extremely it is connected, the cathode of diode D5 is connected with one end of the emitter of triode Q6, resistance R21 respectively, the other end of resistance R21
Be connected respectively with the emitter of one end triode Q7 of resistance R22, the collector of triode Q7 respectively with the anode of diode D6,
One end of resistance R23 is connected, and the other end of resistance R23 is connected with the base stage of the other end of resistance R22, triode Q6 respectively, and two
The cathode of pole pipe D6 is connected with the input anode of battery, the other end of resistance R24 respectively with the base stage of triode Q7, triode
The collector of Q6 is connected.
Preferably, the signal conditioning circuit includes operational amplifier Q1, resistance R1, resistance R2, capacitor C1 and capacitor C2；
The filter amplification circuit includes operational amplifier Q2, resistance R3, resistance R4, resistance R5, resistance R6, slide rheostat RT1, electricity
Hold C3 and capacitor C4；
The non-inverting input terminal of the operational amplifier Q1 is connected with the first connecting terminal of interface U1, the second terminals of interface U1
Son ground connection, the inverting input terminal of operational amplifier Q1, power cathode ground connection, the positive pole series resistor R2 of operational amplifier Q1
It is connected afterwards with 5V power end, is grounded after the line serial capacitance C2 between the positive pole and resistance R2 of operational amplifier Q1, electricity
Resistance R1 is attempted by the both ends of the non-inverting input terminal of operational amplifier Q1, output end, and capacitor C1 is attempted by the both ends resistance R1, and operation is put
The output end of big device Q1 is connected after being sequentially connected in series resistance R3, resistance R4 with the non-inverting input terminal of operational amplifier Q2, resistance R3, electricity
It is grounded after line serial capacitance C3 between resistance R4, the line between resistance R3, resistance R4 is consolidated with the first of slide rheostat RT1
Fixed end is connected, and the second fixing end of slide rheostat RT1 is connected and one with capacitor C4 with the sliding end of slide rheostat RT1
End, the output end of operational amplifier Q2, resistance R6 one end be connected, the other end of capacitor C4 is same mutually defeated with operational amplifier Q2's
Enter end to be connected, be grounded after the inverting input terminal series resistor R5 of operational amplifier Q1, the other end and A/D converter circuit of resistance R6
Input terminal be connected, interface U1 is electrically connected with sensor group.
Preferably, the positioning circuit includes Beidou circuit and base station circuitry.
Preferably, the sensor group includes formaldehyde sensor, Temperature Humidity Sensor, dust sensor, carbon monoxide biography
Sensor and sulfide sensor.
Preferably, telecommunication circuit is WIFI module or GPRS communication module or 3G communication module or cdma communication module.
Compared with the prior art, the invention has the following beneficial effects:
1, the present invention has the air detection instrument of positioning function, including shell, is provided with display screen, key and instruction on shell
Lamp, the side of shell are provided with the air-guiding aisle through shell, and sensor group is provided on the inner wall of air-guiding aisle, is set in shell
It is equipped with circuit board；The present invention can be accurately positioned air detection instrument, realize the long-range monitoring of staff, improve work
Make efficiency, save manpower and material resources, there is extremely strong practicability.
2, the side of inventive shell is provided with the air-guiding aisle through shell, and air-guiding aisle solves traditional gas inspection
Device because atmosphere draught-free influence caused by inspection result inaccuracy problem；Sensor is set on the inner wall of air-guiding aisle
Sensor group is arranged on the inner wall of air-guiding aisle group, avoid flow velocity excessive or collide etc., sensor group is fallen, is extended
The service life of sensor group.
3, it is provided with signal conditioning circuit and filter amplification circuit on circuit board of the present invention, it, will by signal conditioning circuit
The current signal of input is converted to voltage signal, can be improved carrying load ability；By filter amplification circuit, circuit can be improved
Signal-to-noise ratio, signal is effectively amplified, avoid acquisition data loss and inaccuracy.
Detailed description of the invention
The present invention will be further described in detail with reference to the accompanying drawing.
Fig. 1 is the structural schematic diagram that the embodiment of the present invention one provides；
Fig. 2 is the structural schematic diagram for the circuit board that the embodiment of the present invention one provides；
Fig. 3 is the structural schematic diagram of power supply module provided by Embodiment 2 of the present invention；
The circuit structure diagram of signal conditioning circuit, filter amplification circuit that Fig. 4 provides for the embodiment of the present invention three；
In figure: 1 is shell, and 11 be circuit board, and 111 be signal conditioning circuit, and 112 be filter amplification circuit, and 113 be AD conversion electricity
Road, 114 be single-chip microcontroller, and 115 be positioning circuit, and 116 be telecommunication circuit, and 2 be display screen, and 3 be key, and 4 be indicator light, and 5 be to lead
Wind channel, 6 be solar panel, and 7 be anti-surge circuit, and 8 be charging circuit, and 9 be voltage regulator circuit, and 10 be overcurrent protection electricity
Road, 11 be battery.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiments of the present invention, instead of all the embodiments；Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Embodiment one:
As shown in Figure 1, the air detection instrument with positioning function, including shell 1, be provided on the shell 1 display screen 2, by
Key 3 and indicator light 4, the side of the shell 1 are provided with the air-guiding aisle 5 through shell, set on the inner wall of the air-guiding aisle 5
It is equipped with sensor group, circuit board 11 is provided in the shell 1, the display screen 2, key 3, indicator light 4 and sensor group are equal
Circuit board 11 is electrically connected respectively；The sensor group includes formaldehyde sensor, Temperature Humidity Sensor, dust sensor, an oxidation
Carbon sensor and sulfide sensor.
Specifically, the collected signal of sensor group is sent in background monitoring after the processing of circuit on circuit board 11
The heart makes staff understand the air conditions around air detection instrument in real time, and at the same time, treated, and signal passes through display screen
2 are shown, the staff at scene is made to understand working condition in time；Pass through the detection under the adjustable different situations of key 3
Standard, the purpose for being optimal；The side of shell 1 is provided with the air-guiding aisle 5 through shell, solves traditional gas inspection
Device because atmosphere draught-free influence caused by inspection result inaccuracy problem；Sensing is set on the inner wall of air-guiding aisle 5
Device group sensor group is arranged on the inner wall of air-guiding aisle 5, avoid flow velocity excessive or collide etc., sensor group is fallen, is prolonged
The service life of tall sensor group.
As shown in Fig. 2, being provided with signal conditioning circuit 111, filter amplification circuit 112, AD conversion on the circuit board 11
Circuit 113, single-chip microcontroller 114, positioning circuit 115 and telecommunication circuit 116, the input terminal and sensing of the signal conditioning circuit 111
The electrical connection of device group, the output end of the signal conditioning circuit 111 are connected with the input terminal of filter amplification circuit 112, filter and amplification
The output end of circuit 112 is connected with the input terminal of A/D converter circuit 113, output end and the single-chip microcontroller 114 of A/D converter circuit 113
Input terminal is connected, and positioning circuit 115 is connected with the input terminal of single-chip microcontroller 114, and the output end of single-chip microcontroller 114 passes through telecommunication circuit
116 connect with background monitoring center to center communications；The telecommunication circuit 116 is WIFI module or GPRS communication module or 3G communication module
Or cdma communication module；Above-mentioned module is small in size, inexpensive, realizes high speed data transfer；The model of the single-chip microcontroller
STC89C52, the single-chip microcontroller have the characteristics that high speed, low-power consumption, superpower interference.
Specifically, current signal is converted to voltage letter through signal conditioning circuit 111 by sensor group output current signal
Number, the voltage signal after conversion is sent to filter amplification circuit 112,112 filtering interference signals of filter amplification circuit, and will be electric
It is transmitted to A/D converter circuit 113 after pressure signal amplification, obtains needing the number of detection gas concentration to believe by A/D converter circuit 113
Number, the digital signal after conversion is sent to single-chip microcontroller 114 by A/D converter circuit 113, while positioning the sky by positioning circuit 115
The position of gas detector, and location information is sent to single-chip microcontroller 114, single-chip microcontroller is by collected sensor group signal and air
The location information of detector is sent to background monitoring center by telecommunication circuit 116, realizes the long-range monitoring of staff, improves
Working efficiency, saves manpower and material resources, has extremely strong practicability.
In use, sensor group acquires air in real time, air signal is through signal conditioning circuit 111, filter amplification circuit
112, A/D converter circuit 113 is sent to single-chip microcontroller 114 after handling, and is transmitted to background monitoring center by telecommunication circuit 116, and
And the air detection instrument position is positioned by positioning circuit 115, enable staff at background monitoring center to multiple air
Detector carries out Centralized Monitoring.
Embodiment two:
As shown in figure 3, the air detection instrument further includes power supply module, the power supply module includes solar panel 6, wave resistance
Circuit 7, charging circuit 8, voltage regulator circuit 9, current foldback circuit 10 and battery 11 are gushed, the solar panel 6 successively leads to
It crosses anti-surge circuit 7, charging circuit 8, voltage regulator circuit 9, current foldback circuit 10 to be electrically connected with battery 11, the battery 11
By being electrically connected with the input terminal of single-chip microcontroller 114, it is powered for the air detection instrument.
The anti-surge circuit 7 includes capacitor C5, capacitor C6, resistance R7, resistance R8, resistance R9, resistance R10, metal-oxide-semiconductor
Q3；Charging circuit 8 includes triode Q4, triode Q5, rectifier bridge T2；Voltage regulator circuit 9 includes voltage stabilizing chip U1, inductance L4；It crosses
Stream protection circuit 10 includes triode Q6, triode Q7；The model XL6009 of voltage stabilizing chip U1, voltage stabilizing chip U1 energy will be lower
DC voltage be converted into output high voltage and allow larger current export voltage boosting dc power supply, make power supply module towards function
Small, output voltage stabilization, small in size, light-weight, high conversion efficiency, energy conservation etc. development are consumed, there is certain practicability.
One end of the capacitor C5 is connected with the output plus terminal of the anode of diode D2, solar panel 6 respectively, two poles
The cathode of pipe D2 is connected with the source electrode of one end of resistance R7, metal-oxide-semiconductor Q3 respectively, diode D1 be attempted by the source electrode of metal-oxide-semiconductor Q3 with
Drain both ends, and resistance R11 is attempted by diode D1, the drain electrode of metal-oxide-semiconductor Q3 respectively with one end of resistance R9, capacitor C6 one
End, one end of capacitor C7, one end of resistance R12, one end of resistance R15, transformer T1 coil L1 one end be connected, transformer
The other end of the coil L1 of T1 is connected with the collector of the other end of resistance R15, triode Q5 respectively, the base stage point of triode Q5
It is not connected with the collector of the other end of resistance R12, one end of resistance R13, triode Q4, the other end of resistance R13 concatenates electricity
It is connected after holding C8 with one end of the coil L2 of transformer T1, the other end of the coil L2 of the transformer T1 hair with triode Q5 respectively
Emitter-base bandgap grading, one end of resistance R14, the emitter of triode Q4, the other end of capacitor C7, the other end of capacitor C6, resistance R10 one
End, the grid of metal-oxide-semiconductor Q3, one end of resistance R8, the other end of capacitor C5, the output negative terminal of solar panel 6 are connected, resistance
The other end of R8 is connected with the other end of resistance R7, and the other end of resistance R10 is connected with the other end of resistance R9, transformer T1's
Coil L3 is attempted by the both ends of the input anode of rectifier bridge T2, input negative terminal；
The other end of resistance R14 is connected with the anode of the base stage of triode Q4, diode D3 respectively, the cathode difference of diode D3
Be connected with one end of one end of resistance R16, resistance R17, the other end of resistance R16 respectively with the output plus terminal of rectifier bridge T2, electricity
Hold one end of C9, one end of capacitor C10, one end of capacitor C11, one end of inductance L4, one end of resistance R18, voltage stabilizing chip U1
The end IN be connected, the other end of resistance R18 is connected with the end EN of voltage stabilizing chip U1, the output negative terminal of rectifier bridge T2 respectively with resistance
The other end of R17, the other end of capacitor C9, the other end of capacitor C10, the other end of capacitor C11, voltage stabilizing chip U1 the end GND,
One end of resistance R19, one end of capacitor C12, one end of capacitor C13, one end of resistance R24, battery 11 input negative terminal phase
Even, the end SW of voltage stabilizing chip U1 is connected with the anode of the other end of inductance L4, diode D4 respectively, the cathode difference of diode D4
It is connected with one end of one end of resistance R20, the other end of capacitor C12, the other end of capacitor C13, fuse F1, resistance R20's
The other end is connected with the other end of the end FB of voltage stabilizing chip U1, resistance R19 respectively, and the other end of fuse F1 is with diode D5's
Anode is connected, and the cathode of diode D5 is connected with one end of the emitter of triode Q6, resistance R21 respectively, and resistance R21's is another
End be connected respectively with the emitter of one end triode Q7 of resistance R22, the collector of triode Q7 respectively with diode D6 just
Pole, one end of resistance R23 are connected, and the other end of resistance R23 is connected with the base stage of the other end of resistance R22, triode Q6 respectively,
The cathode of diode D6 is connected with the input anode of battery 11, the other end of resistance R24 respectively with the base stage of triode Q7, three
The collector of pole pipe Q6 is connected.
Specifically, for solar panel 6 by voltage transmission into anti-surge circuit 7, resistance R7 and resistance R8 form first
Voltage detecting circuit is able to detect the voltage of the output of solar panel 6, resistance R9 and resistance R10 composition second voltage detection
Circuit is able to detect the voltage of 7 output end of anti-surge circuit, and resistance R11 is divider resistance, and the resistance value of divider resistance R11 is 40-
200Ω；Can be to avoid the surge of solar power generation route by anti-surge circuit 7, powered stable is reliable, avoids damage air inspection
Survey the electronic device of instrument；By treated the voltage transmission of anti-surge circuit 7 to charging circuit 8, is handled, obtained by charging circuit 8
To stable voltage；By voltage regulator circuit 9, by constant voltage output into current foldback circuit 10, voltage passes through fuse
With diode D5, play the role of to power protection；When working properly, the base stage of triode Q7 is grounded by R24, triode
Q7 saturation conduction, when live short circuit or other reasons increased dramatically electric current, voltage that loop current generates on resistance R21
Difference will make triode Q6 saturation conduction, and the voltage at this moment generated on resistance R24 can be such that triode Q7 turns off, so that it is logical to reach closing
The purpose in road circuit；When field condition restores normal, loop current is smaller, and resistance R21 both end voltage very little is not enough to maintain three
The conducting of pole pipe Q6, so that triode Q6 ends, causing R24 to power on, buckling is small, and triode Q7 conducting, circuit restores normal；It crosses
Stream protection circuit can shield to channel loop electric current, protect signal input channel；It is filled by solar panel 6
Electricity converts solar energy into electrical energy, energy saving, and applicability is wide.
Embodiment three:
As shown in figure 4, the signal conditioning circuit 111 includes operational amplifier Q1, resistance R1, resistance R2, capacitor C1 and capacitor
C2；The filter amplification circuit 112 includes operational amplifier Q2, resistance R3, resistance R4, resistance R5, resistance R6, slide rheostat
RT1, capacitor C3 and capacitor C4；The model TLC271 of the operational amplifier Q1, operational amplifier Q2, operational amplifier Q2 tool
There is the features such as low maladjustment voltage drift, the input offset voltage rank of wide scope and high input impedance, and there is biasing selection
Function can reduce power consumption in the case where biasing selection function mode, thus extend the service life of battery 11.
The non-inverting input terminal of the operational amplifier Q1 is connected with the first connecting terminal of interface U1, and the second of interface U1 connects
Line terminals ground connection, the inverting input terminal of operational amplifier Q1, power cathode ground connection, the positive pole of operational amplifier Q1 concatenate electricity
It is connected after resistance R2 with 5V power end, the line serial capacitance C2 between the positive pole and resistance R2 of operational amplifier Q1 is followed by
Ground, resistance R1 are attempted by the both ends of the non-inverting input terminal of operational amplifier Q1, output end, and capacitor C1 is attempted by the both ends resistance R1,
The output end of operational amplifier Q1 is connected after being sequentially connected in series resistance R3, resistance R4 with the non-inverting input terminal of operational amplifier Q2, electricity
It is grounded after line serial capacitance C3 between resistance R3, resistance R4, line and slide rheostat RT1 between resistance R3, resistance R4
The first fixing end be connected, the second fixing end of slide rheostat RT1 be connected with the sliding end of slide rheostat RT1 simultaneously and capacitor
One end of C4, the output end of operational amplifier Q2, one end of resistance R6 are connected, and the other end of capacitor C4 is with operational amplifier Q2's
Non-inverting input terminal is connected, and is grounded after the inverting input terminal series resistor R5 of operational amplifier Q1, and the other end and AD of resistance R6 turns
The input terminal for changing circuit 113 is connected, and interface U1 is electrically connected with sensor group.
Specifically, the collected current mode signal of sensor group is transferred to operational amplifier Q1 by interface U1, and operation is put
Big device Q1 and resistance R1, capacitor C1, resistance R2 and capacitor C2 constitute parallel voltage negtive backword circuit, the electric current of input can be believed
Voltage signal number is converted to, while resistance R2 and capacitor C2 constitutes filter circuit, can filter out unnecessary interference；Through signal condition
The signal that circuit 111 exports is transmitted to filter amplification circuit 112, and resistance R3 and capacitor C3 are filtered signal, can filter
Interference of the external circuitry to signal, improves the validity of signal, and filtered signal is amplified through operational amplifier Q2, is made
Filter amplification circuit 112 exports stable voltage signal to A/D converter circuit 113；Slide rheostat RT1 is adjustable resistance, is used for
Gain amplifier is adjusted, amplification output is stablized；Signal conditioning circuit 111 can be improved carrying load ability；Low-pass filtering amplifying circuit
112 can be improved the signal-to-noise ratio of circuit, effectively be amplified to signal, and the loss and inaccuracy of acquisition data are avoided.
Example IV:
On the basis of example 1, the positioning circuit includes Beidou circuit and base station circuitry.
When positioning circuit is Beidou circuit, single-chip microcontroller 114 sends request signal to satellite, and satellite sends position data
To single-chip microcontroller 114, position data is sent to background monitoring center by single-chip microcontroller 114；When positioning circuit is base station circuitry, pass through
Built-in SIM card and the base station of air detection instrument are communicatively coupled, and obtain the position data of air detection instrument, and by position data
It is sent to background monitoring center；By positioning circuit, staff is not necessarily to carry out air acquisition outside with air detection instrument, improve
Working efficiency.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (7)
1. the air detection instrument with positioning function, including shell (1), it is characterised in that: be provided with display on the shell (1)
Shield (2), key (3) and indicator light (4), the side of the shell (1) is provided with the air-guiding aisle (5) through shell (1), described
It is provided with sensor group on the inner wall of air-guiding aisle (5), is provided with circuit board (11), the display screen in the shell (1)
(2), key (3), indicator light (4) and sensor group circuit board (11) electrical connection respectively；
Signal conditioning circuit (111), filter amplification circuit (112), A/D converter circuit are provided on the circuit board (11)
(113), single-chip microcontroller (114), positioning circuit (115) and telecommunication circuit (116), the input terminal of the signal conditioning circuit (111)
It is electrically connected with sensor group, the output end and the input terminal phase of filter amplification circuit (112) of the signal conditioning circuit (111)
Even, the output end of filter amplification circuit (112) is connected with the input terminal of A/D converter circuit (113), A/D converter circuit (113) it is defeated
Outlet is connected with the input terminal of single-chip microcontroller (114), and positioning circuit (115) is connected with the input terminal of single-chip microcontroller (114), single-chip microcontroller
(114) output end is connect by telecommunication circuit (116) with background monitoring center to center communications.
2. with the air detection instrument of positioning function shown according to claim 1, it is characterised in that: it further include power supply module,
The power supply module includes: solar panel (6), anti-surge circuit (7), charging circuit (8), voltage regulator circuit (9), overcurrent guarantor
Protection circuit (10) and battery (11), the solar panel (6) pass sequentially through anti-surge circuit (7), charging circuit (8),
Voltage regulator circuit (9), current foldback circuit (10) are electrically connected with battery (11), the battery (11) and single-chip microcontroller (114)
Input terminal electrical connection.
3. with the air detection instrument of positioning function according to shown in claim 2, it is characterised in that: the anti-surge circuit
It (7) include capacitor C5, capacitor C6, resistance R7, resistance R8, resistance R9, resistance R10, metal-oxide-semiconductor Q3；Charging circuit (8) includes three poles
Pipe Q4, triode Q5, rectifier bridge T2；Voltage regulator circuit (9) includes voltage stabilizing chip U1, inductance L4；Current foldback circuit (10) includes
Triode Q6, triode Q7；
One end of the capacitor C5 is connected with the output plus terminal of the anode of diode D2, solar panel (6) respectively, diode
The cathode of D2 is connected with the source electrode of one end of resistance R7, metal-oxide-semiconductor Q3 respectively, and diode D1 is attempted by source electrode and the leakage of metal-oxide-semiconductor Q3
Pole both ends, resistance R11 are attempted by diode D1, the drain electrode of metal-oxide-semiconductor Q3 respectively with one end of resistance R9, capacitor C6 one
End, one end of capacitor C7, one end of resistance R12, one end of resistance R15, transformer T1 coil L1 one end be connected, transformer
The other end of the coil L1 of T1 is connected with the collector of the other end of resistance R15, triode Q5 respectively, the base stage point of triode Q5
It is not connected with the collector of the other end of resistance R12, one end of resistance R13, triode Q4, the other end of resistance R13 concatenates electricity
It is connected after holding C8 with one end of the coil L2 of transformer T1, the other end of the coil L2 of the transformer T1 hair with triode Q5 respectively
Emitter-base bandgap grading, one end of resistance R14, the emitter of triode Q4, the other end of capacitor C7, the other end of capacitor C6, resistance R10 one
End, the grid of metal-oxide-semiconductor Q3, one end of resistance R8, the other end of capacitor C5, the output negative terminal of solar panel (6) are connected, electricity
The other end of resistance R8 is connected with the other end of resistance R7, and the other end of resistance R10 is connected with the other end of resistance R9, transformer T1
Coil L3 be attempted by rectifier bridge T2 input anode, input negative terminal both ends；
The other end of resistance R14 is connected with the anode of the base stage of triode Q4, diode D3 respectively, the cathode difference of diode D3
Be connected with one end of one end of resistance R16, resistance R17, the other end of resistance R16 respectively with the output plus terminal of rectifier bridge T2, electricity
Hold one end of C9, one end of capacitor C10, one end of capacitor C11, one end of inductance L4, one end of resistance R18, voltage stabilizing chip U1
The end IN be connected, the other end of resistance R18 is connected with the end EN of voltage stabilizing chip U1, the output negative terminal of rectifier bridge T2 respectively with resistance
The other end of R17, the other end of capacitor C9, the other end of capacitor C10, the other end of capacitor C11, voltage stabilizing chip U1 the end GND,
One end of resistance R19, one end of capacitor C12, one end of capacitor C13, one end of resistance R24, battery (11) input negative terminal
It is connected, the end SW of voltage stabilizing chip U1 is connected with the anode of the other end of inductance L4, diode D4 respectively, the cathode point of diode D4
It is not connected with one end of one end of resistance R20, the other end of capacitor C12, the other end of capacitor C13, fuse F1, resistance R20
The other end be connected respectively with the other end of the end FB of voltage stabilizing chip U1, resistance R19, the other end of fuse F1 and diode D5
Anode be connected, the cathode of diode D5 is connected with one end of the emitter of triode Q6, resistance R21 respectively, and resistance R21's is another
One end is connected with the emitter of one end triode Q7 of resistance R22 respectively, and the collector of triode Q7 is respectively with diode D6's
Anode, resistance R23 one end be connected, the other end of the resistance R23 base stage phase with the other end of resistance R22, triode Q6 respectively
Even, the cathode of diode D6 is connected with the input anode of battery (11), the other end of the resistance R24 base with triode Q7 respectively
Pole, the collector of triode Q6 are connected.
4. with the air detection instrument of positioning function shown according to claim 1, it is characterised in that: the signal conditioning circuit
It (111) include operational amplifier Q1, resistance R1, resistance R2, capacitor C1 and capacitor C2；The filter amplification circuit (112) includes
Operational amplifier Q2, resistance R3, resistance R4, resistance R5, resistance R6, slide rheostat RT1, capacitor C3 and capacitor C4；
The non-inverting input terminal of the operational amplifier Q1 is connected with the first connecting terminal of interface U1, the second terminals of interface U1
Son ground connection, the inverting input terminal of operational amplifier Q1, power cathode ground connection, the positive pole series resistor R2 of operational amplifier Q1
It is connected afterwards with 5V power end, is grounded after the line serial capacitance C2 between the positive pole and resistance R2 of operational amplifier Q1, electricity
Resistance R1 is attempted by the both ends of the non-inverting input terminal of operational amplifier Q1, output end, and capacitor C1 is attempted by the both ends resistance R1, and operation is put
The output end of big device Q1 is connected after being sequentially connected in series resistance R3, resistance R4 with the non-inverting input terminal of operational amplifier Q2, resistance R3, electricity
It is grounded after line serial capacitance C3 between resistance R4, the line between resistance R3, resistance R4 is consolidated with the first of slide rheostat RT1
Fixed end is connected, and the second fixing end of slide rheostat RT1 is connected and one with capacitor C4 with the sliding end of slide rheostat RT1
End, the output end of operational amplifier Q2, resistance R6 one end be connected, the other end of capacitor C4 is same mutually defeated with operational amplifier Q2's
Enter end to be connected, be grounded after the inverting input terminal series resistor R5 of operational amplifier Q1, the other end and A/D converter circuit of resistance R6
Input terminal be connected, interface U1 is electrically connected with sensor group.
5. with the air detection instrument of positioning function shown according to claim 1, it is characterised in that: the positioning circuit
It (115) include Beidou circuit and base station circuitry.
6. with the air detection instrument of positioning function shown according to claim 1, it is characterised in that: the sensor group includes
Formaldehyde sensor, Temperature Humidity Sensor, dust sensor, carbon monoxide transducer and sulfide sensor.
7. with the air detection instrument of positioning function shown according to claim 1, it is characterised in that: telecommunication circuit (116) is
WIFI module or GPRS communication module or 3G communication module or cdma communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811139005.7A CN109115962A (en) | 2018-09-28 | 2018-09-28 | Air detection instrument with positioning function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811139005.7A CN109115962A (en) | 2018-09-28 | 2018-09-28 | Air detection instrument with positioning function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109115962A true CN109115962A (en) | 2019-01-01 |
Family
ID=64857054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811139005.7A Pending CN109115962A (en) | 2018-09-28 | 2018-09-28 | Air detection instrument with positioning function |
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| Country | Link |
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| CN (1) | CN109115962A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781956A (en) * | 2019-03-16 | 2019-05-21 | 嘉兴勤慎智能技术有限公司 | A kind of coal gas monitoring sensor |
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| CN104655794A (en) * | 2013-11-17 | 2015-05-27 | 青岛网媒软件有限公司 | Intelligent indoor air detection device |
| CN205958542U (en) * | 2016-08-10 | 2017-02-15 | 北京极体科技有限公司 | Gaseous detection device with locate function |
| CN207198130U (en) * | 2017-10-10 | 2018-04-06 | 项俊宁 | A kind of portable intelligent tunnel gas detecting instrument |
| CN209432769U (en) * | 2018-09-28 | 2019-09-24 | 董康 | A kind of air detection instrument with positioning function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104655794A (en) * | 2013-11-17 | 2015-05-27 | 青岛网媒软件有限公司 | Intelligent indoor air detection device |
| CN205958542U (en) * | 2016-08-10 | 2017-02-15 | 北京极体科技有限公司 | Gaseous detection device with locate function |
| CN207198130U (en) * | 2017-10-10 | 2018-04-06 | 项俊宁 | A kind of portable intelligent tunnel gas detecting instrument |
| CN209432769U (en) * | 2018-09-28 | 2019-09-24 | 董康 | A kind of air detection instrument with positioning function |
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