CN209690215U - A kind of gas detector that suitable altitude environment uses - Google Patents
A kind of gas detector that suitable altitude environment uses Download PDFInfo
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- CN209690215U CN209690215U CN201920049509.3U CN201920049509U CN209690215U CN 209690215 U CN209690215 U CN 209690215U CN 201920049509 U CN201920049509 U CN 201920049509U CN 209690215 U CN209690215 U CN 209690215U
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Abstract
The utility model discloses a kind of gas detectors that suitable altitude environment uses, including sensor unit, transmitter unit, host computer, the sensor unit is used to sense the flammable or toxic gas in high raw-gas, and be converted to the measuring signal proportional to gas concentration, the transmitter unit is used for the height above sea level according to affiliated plateau, measurement parameter compensates the measuring signal, obtain real data, and real data is shown or is exported to host computer, the sensor unit connects the transmitter unit, the transmitter unit is also connected with the host computer, the application is according to the difference of the height above sea level oxygen content of measured position, accordingly detection result is compensated, to accurately detect the gas content of different altitude height position.
Description
Technical field
The utility model relates to detection of gas technical fields, visit more particularly, to a kind of gas that suitable altitude environment uses
Survey device.
Background technique
Gas detector is that institute's detection gas content in air is converted to voltage or current signal, and voltage or electricity
Signal relationship proportional to gas concentration is flowed, must have oxygen during detecting conversion and participate in, in Plain or low altitude area
In the case of, the content of oxygen is sufficient in air, but in altitude environment, and the comparision contents of oxygen are low in air, to plateau
It just will affect transformation result when detecting in environment, thus to the detection inaccuracy of institute's detection gas content in air, therefore, how
It is accurate to detect flammable or toxic gas content in air in the case where plateau or low oxygen content, it is urgently to be resolved at present
Problem.
Summary of the invention
The purpose of the utility model is to provide a kind of gas detectors that suitable altitude environment uses, according to position
Height above sea level compensates accordingly the oxygen content in air, to realize under the different environment of oxygen content, also can accurately detect sky
The toxic or combustible gas scale of construction, eliminates danger in gas.
The above-mentioned purpose of utility model of the utility model has the technical scheme that
A kind of gas detector that suitable altitude environment uses, including sensor unit, transmitter unit, host computer, institute
Sensor unit is stated for sensing the flammable or toxic gas in high raw-gas, and is converted to the measurement proportional to gas concentration
Signal, the transmitter unit are obtained for being compensated according to the height above sea level on affiliated plateau, measurement parameter to the measuring signal
Real data, and display is carried out to real data or output is to host computer after conversion, described in the sensor unit connection
Transmitter unit, the transmitter unit are also connected with the host computer.
The utility model is further arranged to: the sensor unit includes sense amp circuit, A/D converter circuit, sensing
Device control circuit, the sense amp circuit put the gas signal sensed for sensing flammable or toxic gas
Greatly, sensor signal is obtained, the A/D converter circuit is used to the sensor signal being converted to digital signal, the sensor
The digital signal is converted to gas concentration signal by control circuit, and is transferred to the transmitter unit；The Sense Amplification
A/D converter circuit described in circuit connection, the A/D converter circuit are also connected with the sensor control circuit.
The utility model is further arranged to: the sensor unit further includes temperature measuring circuit, is used for real-time measurement
The temperature of position, the temperature measuring circuit connect the sensor control circuit.
The utility model is further arranged to: the sensor control circuit includes first singlechip.
The utility model is further arranged to: the sensor unit further includes sensor heat tracing control circuit, the biography
Sensor heat tracing control circuit is used to heat sensor when being lower than a certain set temperature value；The sensor heat tracing control
Sensor control circuit described in circuit connection.
The utility model is further arranged to: the transmitter unit include transmitter control circuit, input control circuit,
Display circuit, DA conversion circuit, current output circuit, the transmitter control circuit connect input control circuit, the display
Circuit, the DA conversion circuit, the DA conversion circuit connect the current output circuit；The transmitter control circuit is used
In the height above sea level according to belonging positions, judge whether to compensate gas concentration signal, the input control circuit is used for
Input measurement parameter information；The current output circuit is used to voltage signal being converted to current signal.
The utility model is further arranged to: the transmitter unit further includes contact control output circuit, the contact
It controls output circuit and connects the transmitter control circuit, the contact control output circuit is used for the content according to probe gas
Export alarm signal.
The utility model is further arranged to: the transmitter unit further includes communication RS485 output circuit, the communication
RS485 output circuit connects the transmitter control circuit, and the communication RS485 output circuit is defeated for output transducer unit
Gas concentration digital data signal out is to host computer.
The utility model is further arranged to: the transmitter control circuit includes second singlechip.
The utility model is further arranged to: further including power circuit, for converting input voltage into sensor unit
With voltage needed for transmitter unit.
Compared with prior art, the advantageous effects of the utility model are as follows:
1. the utility model is by setting sensor control circuit and transmitter control circuit, according to the height above sea level of measured position
The difference of height oxygen content, accordingly compensates detection result, thus accurate probe gas content.
2. further, the utility model corrects output offset by setting input control circuit and display circuit in time,
Keep detection result more acurrate.
3. further, the utility model by setting display circuit, real-time display detection result, convenient for benchmark adjust and
Detection result observation.
Detailed description of the invention
Fig. 1 is the electrical block diagram of a specific embodiment of the utility model.
Fig. 2 is the detection amplification circuit structure schematic diagram of a specific embodiment of the utility model.
Fig. 3 is the sensor control circuit structural schematic diagram of a specific embodiment of the utility model.
Fig. 4 is the transmitter control circuit structural representation of a specific embodiment of the utility model.
Fig. 5 is the input control circuit structural schematic diagram of a specific embodiment of the utility model.
Fig. 6 is the contact output circuit structure schematic diagram of a specific embodiment of the utility model.
Fig. 7 is the communicating circuit structural schematic diagram of a specific embodiment of the utility model.
Fig. 8 is the DA converting circuit structure schematic diagram of a specific embodiment of the utility model.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
The gas detector that a kind of suitable altitude environment disclosed by the utility model uses, as shown in Figure 1, including sensor
Unit, transmitter unit, host computer, the sensor unit is used to sense the flammable or toxic gas in high raw-gas, and turns
It is changed to the measuring signal proportional to gas concentration, the transmitter unit is for the height above sea level according to affiliated plateau, measurement parameter
The measuring signal is compensated, real data is obtained, and display is carried out to real data or is exported after conversion to upper
Position machine, the sensor unit connect the transmitter unit, and the transmitter unit is also connected with the host computer.
Sensor unit includes sense amp circuit, A/D converter circuit, sensor control circuit, the sense amp circuit
It is amplified for sensing flammable or toxic gas, and to the gas signal sensed, obtains sensor signal, the AD conversion
Circuit is used to the sensor signal being converted to digital signal, and the sensor control circuit is converted to the digital signal
Gas concentration signal, and it is transferred to the transmitter unit；The sense amp circuit connects the A/D converter circuit, the AD
Conversion circuit is also connected with the sensor control circuit.
Transmitter unit includes that transmitter control circuit, input control circuit, display circuit, DA conversion circuit, electric current are defeated
Circuit out, the transmitter control circuit connect input control circuit, the display circuit, the DA conversion circuit, the DA
Conversion circuit connects the current output circuit；The transmitter control circuit, for the height above sea level according to affiliated plateau, judgement is
No to compensate to gas concentration signal, the input control circuit is used for input control information；The current output circuit is used
In voltage signal is converted to current signal.
In the specific embodiment of the application, as shown in Fig. 2, sense amp circuit includes that sensor receives signal end
ZA1, ZA2, Z2 are integrated with amplifying circuit in integrated circuit U4, amplification factor are controlled using digital form, then to amplified
Signal is AD converted, and is exported using SCL, SDA dual bus mode to sensor controller.
Preferably, amplification factor range is 1-8 times.
As shown in figure 3, sensor control circuit includes sensor single-chip microcontroller U7, as serial communication from equipment, waits and becoming
It send device unit to issue communication instruction, after self-test, information such as gas type, unit, range, the running times set, sends
Give transmitter unit.Then start to control A/D converter circuit and amplifying circuit carries out sensor signal processing, voltage signal is turned
It is changed to digital signal, and voltage value is converted to by gas concentration value according to algorithm.Sensor single-chip microcontroller U7 is received with certain frequency
Sensor signal carries out digital filtering, after the completion of processing, waits transmitter unit to issue instruction, data are transferred out.Week and
It renews.
If transmitter issues calibration command, according to debugging set-up mode, change the amplification factor of AD, to Change-over knot
Fruit calibration.
One end PD6 of temperature measuring circuit UC1 connection sensor single-chip microcontroller U7, the temperature for real-time measurement position
Degree.
As shown in figure 4, transmitter control circuit includes transmitter single-chip microcontroller U3, powered on before being powered on every time, single-chip microcontroller
It after the completion of self-test, is configured according to detection purpose, measurement unit, precision, amplification factor etc., setting is set by input circuit
It is saved after the completion.After booting next time, transmitter single-chip microcontroller U3 reads corresponding setting from memory, and is shown in display LCD
On display screen, if user it is found not to be the setting of needs, setting can be re-started.
In order to keep sensor single-chip microcontroller consistent with the parameter of transmitter single-chip microcontroller, after booting, transmitter single-chip microcontroller U3 self-test
After the completion, it sends communication command and gives sensor single-chip microcontroller U7.Read sensor single-chip microcontroller U7 in store measurement type, unit,
The parameters such as range, and shown by LCD display.
After powering on, transmitter single-chip microcontroller U3 sends instruction by certain frequency, and request sensor single-chip microcontroller U7 transmits sensor
Initial value data judge whether that with good grounds height above sea level is modified after obtaining sensor initial value data, if so, just reading
Corresponding compensating parameter enters DA conversion circuit, display circuit after being modified, if not provided, being just directly entered DA conversion electricity
Road, display circuit.Display circuit is directly shown.
If it find that internal be provided with height above sea level.It then goes to be judged: judging height above sea level is how many, it should mend corresponding
The curve group of height.After determining curve group, analysis is in that line segment section, to be compensated accordingly.Thus complete
Amendment when altitude environment, to measurement inaccuracy.
In one embodiment of the application, height homologous thread is divided into 10 sections, and 0-10 is first segment, compensation 5.2,11-
20 be second segment, and 4.8,21-30 of compensation is third section, compensation 4.2, and so on.If sensor initial value data are 12.2, height
Homologous thread is second segment, then should export 12.2+4.8=17, is corresponded under height above sea level, show value is exactly 17.
As shown in figure 5, input circuit includes four input keys, upper and lower, zero point, gain function are respectively indicated.Each
Three ends of key be separately connected power supply VCC, control the end signal UP/DOWN/ZERO/SPAN, wherein control signal end is led to respectively
It crosses resistance R12/R13/R14/R15 and meets power supply VCC.Wherein, upper and lower key being for selecting, adjust, zero point key for entering,
Abandon, calibrate zero point, gain key for saving, confirming, calibration-gain.Selection is to be selected in lists, after choosing
Confirm by gain key.
Zero point is calibrated, 0 should be shown in no gas.If show value is not 0, zero point key is triggered.Then lead to
Cross down arrows, display be tuned into 0. it is accurate after, point " gain " key, the effect of gain key is exactly to save at this time.
DA conversion circuit and current output circuit are as shown in Figure 8, wherein DA conversion circuit includes DA conversion chip U2, is led to
It crosses SDA/SCL dual bus to connect with sensor single-chip microcontroller U3, the sensor single-chip microcontroller U7 digital signal exported is converted into simulation
Voltage signal, and it is transferred to current converter circuit.Current converter circuit includes that amplification follows circuit, Voltage-current conversion circuit, mould
Quasi- voltage signal follows circuit to amplify by amplification, is converted to current signal using Voltage-current conversion circuit, and will be electric
Stream signal sends host computer to.The amplitude of current signal at this time is 4-20mA.
It includes amplifier U1A that amplification, which follows circuit, and positive input terminal connects the output end of DA conversion circuit, and output end connects
Connect the base stage of triode N1, the input terminal of the collector connection Voltage-current conversion circuit of triode N1, the emitter of triode N1
It links together with the negative input end of amplifier U1A, and is grounded by resistance R3.
Voltage-current conversion circuit includes amplifier U1B, and positive input terminal connection amplification follows the output end of circuit, bears
The emitter of input terminal and triode P1 links together, and meets 23V power supply, output end connecting triode P1 by resistance R1
Base stage, the collector output current signal of triode P1.
Transmitter unit further includes contact control output circuit, as shown in fig. 6, putting including two tunnel photoelectric coupled circuit O1, two tunnels
Big circuit, optocoupler O1 is for transmitter single-chip microcontroller to be isolated with alarm unit, and input terminal J1C/J2C points of two tunnel photoelectric coupled circuit O1
It is not connected to the PD4/PD3 foot of transmitter single-chip microcontroller, the output of two tunnel photoelectric coupled circuit O1 is separately connected the defeated of No. two amplifying circuits
Enter, the output JC1/JC2 of No. two amplifying circuits connects different warning devices, and No. two amplifying circuits all use basic three pole of p-type
Pipe amplifying circuit.
Whether the content of transmitter unit judges measurement gas exceeds the warning level range of setting, sets if more than
Warning concentration maximum value, then issue be higher than setting warning message give contact control output circuit；If lower than the report of setting
The minimum value of alert concentration then issues and controls output circuit to contact lower than setting warning message；Contact control output circuit according to
Different warning messages issues different alarms.
Transmitter unit further includes communication RS485 output circuit, as shown in fig. 7, comprises communication RS485 chip UB1, letter
Number end end RXD/TXD/CS485 is separately connected the PD0/PD1/PD2 foot of transmitter single-chip microcontroller, for being led to transmitter unit
News, the measurement gas concentration digital information transmission that communication RS485 output circuit is used to transmitter unit export is to host computer.
The sensor unit further includes sensor heat tracing control circuit, and the sensor heat tracing control circuit is used for biography
Sensor is heated in low temperature；The sensor heat tracing control circuit connects the sensor control circuit.
Low temperature refers to lower than subzero 10 degree.
Gas detector further includes power circuit, for converting input voltage into sensor unit and transmitter unit institute
The voltage needed.
The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this
The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical
Within novel protection scope.
Claims (10)
1. a kind of gas detector that suitable altitude environment uses, it is characterised in that: including sensor unit, transmitter unit,
Host computer, the sensor unit are used to sense flammable or toxic gas in high raw-gas, and be converted to gas concentration at
The measuring signal of ratio, the transmitter unit be used for according to the height above sea level on affiliated plateau, measurement parameter to the measuring signal into
Row compensation obtains real data, and carries out display to real data or export after conversion to host computer, the sensor list
Member connects the transmitter unit, and the transmitter unit is also connected with the host computer.
2. gas detector according to claim 1, it is characterised in that: the sensor unit includes Sense Amplification electricity
Road, A/D converter circuit, sensor control circuit, the sense amp circuit are used to sense flammable or toxic gas, and to sensing
To gas signal amplify, obtain sensor signal, the A/D converter circuit is for being converted to the sensor signal
The digital signal is converted to gas concentration signal by digital signal, the sensor control circuit, and is transferred to the pick-up
Device unit；The sense amp circuit connects the A/D converter circuit, and the A/D converter circuit is also connected with the sensor control
Circuit.
3. gas detector according to claim 2, it is characterised in that: the sensor unit further includes temperature measurement electricity
Road, for the temperature of real-time measurement position, the temperature measuring circuit connects the sensor control circuit.
4. gas detector according to claim 2, it is characterised in that: the sensor control circuit includes the first monolithic
Machine.
5. gas detector according to claim 2, it is characterised in that: the sensor unit further includes sensor heat tracing
Control circuit, the sensor heat tracing control circuit are used to heat sensor when being lower than a certain set temperature value；Institute
It states sensor heat tracing control circuit and connects the sensor control circuit.
6. gas detector according to claim 1, it is characterised in that: the transmitter unit includes transmitter control electricity
Road, input control circuit, display circuit, DA conversion circuit, current output circuit, the transmitter control circuit connection input control
Circuit processed, the display circuit, the DA conversion circuit, the DA conversion circuit connect the current output circuit；The change
Device control circuit is sent, for the height above sea level according to belonging positions, judges whether to compensate gas concentration signal, it is described defeated
Enter control circuit for input measurement parameter information；The current output circuit is used to voltage signal being converted to current signal.
7. gas detector according to claim 6, it is characterised in that: the transmitter unit further includes that contact control is defeated
Circuit out, the contact control output circuit connect the transmitter control circuit, and the contact control output circuit is used for root
Alarm signal is exported according to the content of probe gas.
8. gas detector according to claim 6, it is characterised in that: the transmitter unit further includes communication RS485
Output circuit, the communication RS485 output circuit connect the transmitter control circuit, and the communication RS485 output circuit is used
In the gas concentration digital data signal that output transducer unit exports to host computer.
9. gas detector according to claim 6, it is characterised in that: the transmitter control circuit includes the second monolithic
Machine.
10. gas detector according to claim 1, it is characterised in that: further include power circuit, be used for input voltage
Voltage needed for being converted to sensor unit and transmitter unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920049509.3U CN209690215U (en) | 2019-01-12 | 2019-01-12 | A kind of gas detector that suitable altitude environment uses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920049509.3U CN209690215U (en) | 2019-01-12 | 2019-01-12 | A kind of gas detector that suitable altitude environment uses |
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| Publication Number | Publication Date |
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| CN209690215U true CN209690215U (en) | 2019-11-26 |
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ID=68598654
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920049509.3U Active CN209690215U (en) | 2019-01-12 | 2019-01-12 | A kind of gas detector that suitable altitude environment uses |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113671119A (en) * | 2021-08-02 | 2021-11-19 | 德尔格安全设备（中国）有限公司 | Gas detection device and temperature compensation method thereof |
| CN113671120A (en) * | 2021-08-02 | 2021-11-19 | 德尔格安全设备（中国）有限公司 | Gas detection device |
-
2019
- 2019-01-12 CN CN201920049509.3U patent/CN209690215U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113671119A (en) * | 2021-08-02 | 2021-11-19 | 德尔格安全设备（中国）有限公司 | Gas detection device and temperature compensation method thereof |
| CN113671120A (en) * | 2021-08-02 | 2021-11-19 | 德尔格安全设备（中国）有限公司 | Gas detection device |
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