CN206671184U - A kind of COD on-line monitoring systems based on embedded system - Google Patents
A kind of COD on-line monitoring systems based on embedded system Download PDFInfo
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- CN206671184U CN206671184U CN201720490670.5U CN201720490670U CN206671184U CN 206671184 U CN206671184 U CN 206671184U CN 201720490670 U CN201720490670 U CN 201720490670U CN 206671184 U CN206671184 U CN 206671184U
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Abstract
The utility model discloses a kind of COD on-line monitoring systems based on embedded system, belong to water quality monitoring equipment technical field.It includes wriggling pump drive, microcontroller, metering system and touch-screen, the wriggling pump drive, the touch-screen and the metering system are connected with the microcontroller, transplanting has embedded system in the microcontroller, and the embedded system is using the μ C/OSIII to increase income.In COD on-line monitoring equipments, water sample, reagent, liquid level metering device and colorimetric metering device connect with multi-channel direction selecting valve respectively, peristaltic pump is connected with liquid level metering device, and liquid level metering device and colorimetric metering device are connected with metering system, and wriggling pump drive is connected with peristaltic pump.It is higher that the utility model solves existing COD on-line monitoring equipments PLC control system cost, and the problem of easily cause hardware incompatibility, has the advantages of cost low, simple to operate, easy remote control.
Description
Technical field
The utility model belongs to water quality monitoring equipment technical field, and embedded system is based on more specifically to one kind
COD on-line monitoring systems.
Background technology
COD (COD or CODcr) refers to that under certain condition the reducing substances in water is in additional Strong oxdiative
In the presence of agent, the quantity that oxidant is consumed when decomposing is oxidized, is represented with the mg/L of oxygen.COD is reflected in water
The degree polluted by reducing substances, these materials include organic matter, nitrite, ferrous salt, sulfide etc..General water and useless
The quantity of inorganic reduction material is relatively little in water, and organic pollution is very universal, and therefore, COD can be used as organic matter
One composite target of matter relative amount.
COD online auto monitoring equipment belongs to waste water on-line detecting system, can implement online auto monitoring to pollution sources.
But COD on-line monitoring equipment parts at present on the market are more, operating procedure is complicated, safeguards inconvenience, and is not easy to carry out
Remote monitoring；In addition, COD on-line monitoring equipments on the market, generally using PLC as controller, cost is higher, and PLC body
Architecture is closing, and the hardware systems of each PLC producers are also incompatible, and it is also different that programming language mentions instruction system.
Chinese utility model, publication number：102262087A, publication date：On November 30th, 2011, disclose total arsenic in water
On-Line Monitor Device, it includes：Sampling pumping system, quantitative system, the multichannel that embedded control system connects with pipeline successively
Sampling system, evict system and absorption and detecting system from；Pre-set control programs in embedded control system, control sampling pump system
System, quantitative system, multichannel sampling system, evict system from and absorb and worked with detecting system, sample pumping system and quantitative system
After quantitative sampling, reagent and water sample to be measured are entered in the system of evicting from through multichannel sampling system, through oxygen in the system of evicting from
The arsenic of inorganic arsenic in water sample to be measured, organo-arsenic variform is unified into a kind of gaseous state arsenic of valence state by the chemical reaction for changing reduction
Thing, total arsenic is all expelled out of and is transferred to absorption with detecting system, absorbing and gaseous state arsenic in detecting system after chemical reaction
Compound is absorbed and carries out the on-line checking of total arsenic, is solved the problems, such as that water sample ambient interferences influence accuracy of measurement, is carried significantly
The high degree of accuracy of measurement, add the scope of application of monitoring.It is disadvantageous in that：(1) reagent and water sample to be measured are being evicted from
After being chemically reacted in system, the on-line checking absorbed with carrying out total arsenic in detecting system is transferred to, detection response is slower, extends
The cycle that equipment is detected；(2) magnetic valve is connected with via pipeline on each passage of multi-channel module, is related to structural portion
Part is more, and the connection and switching of pipeline complicate；(3) the detection means aging of the unstable either colorimetric pool both sides of circuit voltage
When, the intensity size for the light that detection light source is launched can produce fluctuation, cause photodetector reception value to produce fluctuation, and then influence
The accuracy of measured value.
Chinese utility model, publication number：203519491U, publication date：On April 2nd, 2014, disclose a kind of Water quality ammonia nitrogen
On-line computing model, including PLC, Trace Chlorine pump, direct current air pump, magnetic valve, thermostatic mixing device, cuvette,
Photometer, touch screen system, communication module and luminosity controller, connected between PLC and Trace Chlorine pump, PLC controls
Device processed is connected by touch screen system with communication module, and the upper end of thermostatic mixing device is provided with multiple feeding mouths, constant temperature mixing dress
The multiple feeding mouths put are connected with Trace Chlorine pump and direct current air pump respectively, and the lower end of thermostatic mixing device is provided with out
Material mouth, the discharging opening of thermostatic mixing device and one end of magnetic valve are connected, and the other end of magnetic valve is connected with cuvette, cuvette
It is may be contained within luminosity controller in photometer.It is disadvantageous in that：(1) utility model using PLC as controller, into
This is higher, and PLC architecture is closing, and hardware systems compatibility is poor；(2) thermostatic mixing device passes through with cuvette
Magnetic valve is connected, and colorimetric measurement could be carried out by needing to be discharged to cuvette after water sample and reagent hybrid reaction are complete, so as to extend ratio
The response time of color detection；(3) drawn using the control of multiple Trace Chlorine pumps, the structure member being related to is more, cost
Increase therewith, while also cause the connection of pipeline and switching to complicate；(4) due to the presence of magnetic valve minimal internal dead space volume, stream
The water sample and reagent of warp easily remain, thus reduce the accuracy measured.
The content of the invention
1st, to solve the problems, such as
It is higher for the PLC control system cost of existing COD on-line monitoring equipments, and easily cause asking for hardware incompatibility
Topic, the utility model provide a kind of COD on-line monitoring systems based on embedded system.User can be according to the demand pair of oneself
System source code is deleted and changed, so as to avoid the problem of embedded system and hardware device are incompatible.
2nd, technical scheme
To solve the above problems, the utility model adopts the following technical scheme that.
A kind of COD on-line monitoring systems based on embedded system, including wriggling pump drive, microcontroller, metering
System and touch-screen, the wriggling pump drive are connected with the microcontroller, and the touch-screen and the metering system are equal
It is connected with the microcontroller, being transplanted in the microcontroller has embedded system, and the embedded system is using the μ C/ to increase income
OSIII.Microcontroller and its embedded system cost are cheap in the present apparatus, and μ C/OSIII have scalable, curable excellent
Point, operating system is supported to carry out task communication and resource management and synchronous function in real time；Touch-screen real-time display process is joined
Number and testing result, for example, extracting the numerical value of water sample, heat time, the temperature of resolution reaction, reaction time and COD detections
As a result etc., it is also possible to be configured by touch-screen to each parameter value.
Further, the on-line monitoring system includes wireless communication module, the wireless communication module and the micro-control
Device processed is connected by TTL communication modes, and the wireless communication module embeds embedded web server, the embedded system
TCP/IP lightweight protocol LWIP are provided with the μ C/OSIII that increase income used, microcontroller connects through nothing with wireless communication module
Line communication module connects network, and on-line monitoring system realizes wireless communication function, is convenient for remote control.
Further, the metering system includes computation chip, liquid level metering device, colorimetric metering device and temperature acquisition
Device, the computation chip are connected with the microcontroller, the liquid level metering device, the temperature collecting device and the ratio
Color metering device is connected with the computation chip.The computation chip is dual operational amplifier, by way of two level amplification,
Faint optical signal is converted into the voltage signal that microcontroller is capable of precise acquisition.
Further, the liquid level metering device includes reflex glass pipe, infrared transmitting tube and infrared receiving tube, described red
Outer transmitting tube and the infrared receiving tube are symmetrically installed on the reflex glass pipe both sides, the infrared transmitting tube and described red
Outer reception pipe is connected with the computation chip.The liquid level metering device is measured by the way of light cuts liquid level, when
When not having liquid in reflex glass pipe, infrared receiving tube collects the photoelectricity value A of an infrared transmitting tube, when liquid level is slow
When rising, the light sent with infrared transmitting tube that liquid level can be slowly is tangent, and now the photoelectricity value of infrared receiving tube can be by
Decline gradually, when completely it is tangent when, the photoelectricity value of infrared receiving tube can drop to minimum B, pass through infrared receiving tube photoelectricity value
Change, it is ensured that the amount of reagent extracted every time is constant.
Further, the COD on-line monitoring systems include resolution reaction bulb, resolution valve and heater, the resolution
Valve connects with the resolution reaction bulb bottleneck, and the colorimetric metering device includes detection transmitter and detection receiver, the inspection
Survey transmitter and the detection receiver is symmetrically installed on the both sides of resolution reaction bulb, the heater is located at the resolution
On the outside of reaction bulb, the detection transmitter and the detection receiver be connecteds with the computation chip, the heater and
The microcontroller connection.Before carrying out resolution reaction, resolution valve is closed, heater will clear up reaction bulb within the regular hour
Interior temperature is increased to 165 DEG C, and after carrying out heat-insulation pressure keeping 20 minutes, the extinction of colorimetric metering device detection resolution reaction solution
Degree.
Further, the resolution reaction bottle wall is filling heat conductive silica gel in double-decker and interlayer, is pacified in the interlayer
Equipped with temperature collecting device, the temperature collecting device is connected with the computation chip.Structure temperature collection is accurate, Neng Gouzhen
Temperature in the reaction bulb of reaction resolution on the spot.
Further, the colorimetric metering device includes reference transmitter, and the reference transmitter is launched with the detection
Device is positioned at the same side of the resolution reaction bulb and the reference transmitter is positioned at the side of the detection transmitter, the reference
Transmitter is connected with the computation chip.Reference transmitter detects to the intensity of detection transmitter transmitting light, computation chip
The signal of reference transmitter feedback is subjected to photoelectric signal transformation and feeds back to microcontroller, microcontroller is anti-according to computation chip
Feedback signal is calibrated accordingly to the intensity of detection transmitter transmitting light, it is achieved thereby that closed-loop control, makes transmitting light beats
Scope reduces.
Further, the heater is nichrome heating of the spiral wound on the outside of the resolution reaction bulb
Silk, the nichrome heater strip are connected with the microcontroller.Nichrome heater strip has that oxidation resistance is strong, fusing point temperature
The features such as degree is high, resistivity is high, high mechanical strength.
Further, the temperature collecting device includes thermal resistance and amplifying circuit is formed, and the thermal resistance is arranged on institute
In the interlayer for stating resolution reaction bottle wall, the thermal resistance is connected with the amplifying circuit, the amplifying circuit and the metering core
Piece connects, and further increases sensitivity and the degree of accuracy that monitoring system carries out temperature detection.
Further, the thermal resistance is PT100 platinum resistance thermometer sensor,s.PT100 resistance can be as the rising of temperature be into closely
Like growth at the uniform velocity, proportional, thus the resistance by detecting PT100 can accurately calculate temperature value.
3rd, beneficial effect
Compared to prior art, the beneficial effects of the utility model are：
(1) the COD on-line monitoring systems provided by the utility model based on embedded system, μ C/OSIII have and can risen
Level, it is curable the advantages of, there is provided the institute needed for real time operating system is functional, including resource management, synchronization, task communication
Deng uC/OS-III has complete run time measurement performance, can directly transmit signal or message to task；Microcontroller
And its embedded system cost is cheap, the manufacturing cost of equipment is greatly reduced；
(2) the COD on-line monitoring systems provided by the utility model based on embedded system, μ C/OSIII for can cut,
The multitask kernel of type can be deprived, user can be deleted and be changed to system source code according to the demand of oneself, avoids
Embedded system and hardware device it is incompatible the problem of, both met the demand of itself, it also avoid unnecessary system
Code redundancy；
(3) the COD on-line monitoring systems provided by the utility model based on embedded system, microcontroller built-in type system
TCP/IP lightweight protocol LWIP are provided with the μ C/OSIII that increase income used, wireless communication module embeds embedded web server
With network communicating function, microcontroller connects network by wireless communication module so that on-line monitoring system realizes wirelessly
Network communicating function, consequently facilitating user is interacted by GUI and the webserver, and then realize the data of dynamic web page
Interactive function；
(4) the COD on-line monitoring systems provided by the utility model based on embedded system, liquid level metering device and colorimetric
Metering device carries out level gauge and colorimetric detection optical signal is fainter, and computation chip is dual operational amplifier, passes through two level
The mode of amplification carries out photoelectric signal transformation, by faint optical signal be converted into microcontroller be capable of precise acquisition voltage believe
Number, thus it is favorably improved the precision of on-line monitoring system process control；
(5) the COD on-line monitoring systems provided by the utility model based on embedded system, in resolution reaction bulb bottle wall
Temperature collecting device is installed in interlayer and fills heat conductive silica gel in the interlayer of bottle wall, ensures that institute's collecting temperature value
Accuracy, the temperature in resolution reaction bulb can truly be reacted by ensureing the temperature of collection；
(6) the COD on-line monitoring systems provided by the utility model based on embedded system, before resolution reaction, heating dress
Put and the solution in resolution reaction bulb is heated, provide optimal reaction temperature for resolution reaction, what resolution reaction bulb bottleneck was set disappears
Solution valve is isolated from the outside reaction is cleared up, and further ensures that resolution reaction is carried out under conditions of high temperature, high pressure, promotes resolution
Rapid reaction is carried out, so as to which colorimetric metering device can detect to the absorbance for clearing up reaction solution in the short period of time,
Therefore the cycle of monitoring system progress water quality detection greatly shortens；
(7) the COD on-line monitoring systems provided by the utility model based on embedded system, nickel is driven by pulse voltage
Evanohm heater strip heating resolution reaction bulb, quickly can raise the temperature cleared up in reaction bulb, and nichrome heats
Silk has the advantages of oxidation resistance is strong, melting temperature is high, resistivity is high, high mechanical strength；
(8) the COD on-line monitoring systems provided by the utility model based on embedded system, PT100 resistance is with disappearing
The rising of temperature in reaction bulb is solved into approximate growth at the uniform velocity, i.e. proportional, thus by detecting PT100 resistance
Temperature value can be accurately calculated, PT100 thermal resistances are connected by amplifying circuit with computation chip, further increase monitoring
System carries out the sensitivity and the degree of accuracy of temperature detection；
(9) the COD on-line monitoring systems provided by the utility model based on embedded system, touch-screen provide man-machine boundary
Face, coordinated by touch-screen and microcontroller to realize the various complicated function switch controls of COD on-line monitoring systems,
Such as：The driving of peristaltic pump, the control of multi-channel direction selecting valve, the holding for clearing up reaction temperature, collection of photoelectricity value etc., and this is
Parameters in system detection process are shown on the touchscreen, thus present apparatus automaticity is high, simple to operate；
(10) the COD on-line monitoring systems provided by the utility model based on embedded system, infrared transmitting tube transmitting one
Beam infrared light, received through after reflex glass pipe by infrared receiving tube, when the liquid level in reflex glass pipe rises to and infrared light
When beam is tangent, the photoelectricity intensity that infrared receiving tube receives changes, thus the photoelectricity value received by infrared receiving tube
Change carries out the metering of liquid level, it is ensured that quantitatively measures the accuracy of liquid.
Brief description of the drawings
Fig. 1 is the COD on-line monitoring system structural framing figures based on embedded system.
Embodiment
The utility model is described in detail below in conjunction with the accompanying drawings.
A kind of COD on-line monitoring systems based on embedded system, including wriggling pump drive, microcontroller, metering
System and touch-screen, the wriggling pump drive are connected with the microcontroller, and the touch-screen and the metering system are equal
It is connected with the microcontroller, being transplanted in the microcontroller has embedded system, and the embedded system is using the μ C/ to increase income
OSIII.Microcontroller and its embedded system cost are cheap in the present apparatus, and μ C/OSIII are that can cut, can deprive more of type
Be engaged in kernel, user can be deleted and changed to system source code according to the demand of oneself, avoid embedded system with
Hardware device it is incompatible the problem of, thus both met the demand of itself, and it also avoid unnecessary system code redundancy；Touch
Screen real-time display procedure parameter and testing result are touched, it is also possible to be configured by touch-screen to each parameter value.
The on-line monitoring system includes wireless communication module, passes through between the wireless communication module and microcontroller
TTL communication modes are attached, and the wireless communication module embeds embedded web server, and the embedded system uses
The μ C/OSIII that increase income in be provided with TCP/IP lightweight protocol LWIP, microcontroller connects network by wireless communication module,
Line monitoring system realizes wireless communication function, is easy to user to carry out remote control, for example, passing through computer end or mobile phone etc.
Mobile device carries out remote control.
The metering system includes computation chip, liquid level metering device, colorimetric metering device and temperature collecting device, described
Computation chip is connected with the microcontroller, the liquid level metering device, the temperature collecting device and colorimetric metering dress
Put and equal be connected with the computation chip.Liquid level metering device and detection means carry out level gauge and colorimetric detection optical signal compared with
Faint, computation chip is dual operational amplifier, photoelectric signal transformation is carried out by way of two level amplification, by faint optical signal
The voltage signal that microcontroller is capable of precise acquisition is converted into, is favorably improved level gauge and the precision of colorimetric detection.
The liquid level metering device includes reflex glass pipe, infrared transmitting tube and infrared receiving tube, when it is implemented, described
Reflex glass pipe connects with peristaltic pump and multi-channel direction selecting valve, and microprocessor control wriggling pump drive driving peristaltic pump is
Liquid is extracted, liquid enters reflex glass pipe, the infrared transmitting tube and the infrared receiving tube pair by multi-channel direction selecting valve
What is claimed is arranged on the reflex glass pipe both sides, and the infrared transmitting tube and the infrared receiving tube connect with the computation chip
Connect.Infrared transmitting tube launches a branch of infrared light, is received through after reflex glass pipe by infrared receiving tube, when in reflex glass pipe
Liquid level rise to infrared beam it is tangent when, the photoelectricity intensity that infrared receiving tube receives changes, and passes through infrared receiving tube
The change of the photoelectricity value received carries out level gauge, it is ensured that reflex glass pipe quantitatively measures the accuracy of liquid.
The COD on-line monitoring systems include resolution reaction bulb, resolution valve and heater, and the resolution valve disappears with described
Solve the connection of reaction bulb bottleneck, the colorimetric metering device includes detection transmitter and detection receiver, the detection transmitter and
The detection receiver is symmetrically installed on the both sides of resolution reaction bulb, and the heater is outside the resolution reaction bulb
Side, the detection transmitter and the detection receiver are connected with the computation chip, the heater and the micro-control
Device connection processed.Before resolution reaction, heater is heated to the solution in resolution reaction bulb, and optimum response temperature is provided for resolution reaction
Degree, so as to improve resolution reaction rate, and the resolution valve for clearing up the setting of reaction bulb bottleneck can bear high temperature and high pressure, therefore
Resolution reaction can will be effectively isolated from the outside, thereby further ensure that resolution reaction is entered under conditions of high temperature, high pressure
OK, resolution reaction speed is promoted quickly to carry out, resolution reaction terminates and through standing, and colorimetric metering device is carried out to resolution reaction solution
Absorbance detection, the cycle that monitoring system carries out water quality detection greatly shorten.
The resolution reaction bottle wall is filling heat conductive silica gel in double-decker and interlayer, and being provided with temperature in the interlayer adopts
Acquisition means, the temperature collecting device are connected with the computation chip.Installation temperature is adopted in the interlayer of resolution reaction bulb bottle wall
Acquisition means and heat conductive silica gel is filled in the interlayer of bottle wall, ensure that the accuracy of institute's collecting temperature value, ensure collection
Temperature can truly react resolution reaction bulb in temperature.
The colorimetric metering device includes reference transmitter, and the reference transmitter is with the detection transmitter positioned at described
Clear up the same side of reaction bulb and the reference transmitter is positioned at the side of the detection transmitter, the reference transmitter and institute
State computation chip connection.During colorimetric detection, reference transmitter receives detection transmitter transmitting light, and to detection transmitter transmitting
The intensity of light is detected, and the detection signal that reference transmitter feeds back is carried out photoelectric signal transformation and fed back to micro- by computation chip
Controller, microcontroller are calibrated accordingly according to the signal that computation chip feeds back to the intensity of detection transmitter transmitting light,
It is achieved thereby that closed-loop control, reduces transmitting light beats scope.
The heater is spiral wound in the nichrome heater strip cleared up on the outside of reaction bulb, the nickel chromium triangle
Alloy heater strip is connected with the microcontroller.Nichrome heater strip heating resolution reaction bulb, energy are driven by pulse voltage
Enough temperature rises that will quickly clear up in reaction bulb, and nichrome heater strip has that oxidation resistance is strong, melting temperature is high,
The advantages of resistivity is high, high mechanical strength.
The temperature collecting device includes thermal resistance and amplifying circuit is formed, and the thermal resistance is arranged on the resolution and reacted
In the interlayer of bottle wall, the thermal resistance is connected with the amplifying circuit, and the amplifying circuit is connected with the computation chip.
The thermal resistance is PT100 platinum resistance thermometer sensor,s.PT100 resistance can be with increasing of the rising of temperature into approximation at the uniform velocity
It is long, proportional, thus temperature value can be accurately calculated by detecting PT100 resistance, PT100 thermal resistances pass through
Amplifying circuit is connected with computation chip, further increases sensitivity and the degree of accuracy that monitoring system carries out temperature detection.
The utility model is further described below with reference to specific embodiment.
Embodiment 1
As shown in figure 1, a kind of COD on-line monitoring systems based on embedded system, including wriggling pump drive, micro-control
Device, metering system and touch-screen processed, the wriggling pump drive are connected with the microcontroller, the touch-screen and the meter
Amount system is connected with the microcontroller, and being transplanted in the microcontroller has embedded system, and the embedded system uses
The μ C/OSIII to increase income.Microcontroller and its embedded system cost are cheap in the present apparatus, and the manufacturing cost of equipment is relatively low, μ C/
OSIII has the advantages of scalable, curable, supports operating system to carry out task communication and resource management and synchronization in real time
Function；In addition, μ C/OSIII is can cut, can deprive the multitask kernel of type, user can be according to the demand of oneself to being
System source code is deleted and changed, and has both been met the demand of itself, it also avoid unnecessary system code redundancy.Touch
Screen display procedure parameter and testing result in real time, for example, extract the numerical value of water sample, the heat time, resolution reaction temperature,
Reaction time and COD testing results etc., it is also possible to be configured by touch-screen to each parameter value.
Embodiment 2
As shown in figure 1, a kind of COD on-line monitoring systems based on embedded system, including wriggling pump drive, micro-control
Device, metering system, wireless communication module and touch-screen processed, the wriggling pump drive is connected with the microcontroller, described
Touch-screen and the metering system are connected with the microcontroller, and being transplanted in the microcontroller has embedded system, described
Embedded system is using the μ C/OSIII to increase income.Pass through TTL communication modes between the wireless communication module and microcontroller
It is attached, the wireless communication module embeds embedded web server, the μ C/ that increase income that the embedded system uses
TCP/IP lightweight protocol LWIP are provided with OSIII, microcontroller connects network, on-line monitoring system by wireless communication module
Wireless communication function is realized, is easy to user to carry out remote control, for example, entering by mobile devices such as computer end or mobile phones
Row remote control.
Wireless communication module has network communicating function in the present embodiment, and Internet is accessed for COD on-line monitoring systems
Offer system is supported；Embedded web server is to realize COD on-line monitoring systems and the key of Internet interconnections, Yong Hutong
Cross GUI to interact with the webserver, complete the data interaction function of dynamic web page.
Embodiment 3
As shown in figure 1, a kind of COD on-line monitoring systems based on embedded system, its structure compared with Example 2, institute
Unlike：The metering system includes computation chip, liquid level metering device, colorimetric metering device and temperature collecting device, institute
State computation chip to be connected with the microcontroller, the liquid level metering device, the temperature collecting device and colorimetric metering
Device is connected with the computation chip.
Liquid level metering device and colorimetric metering device carry out level gauge and colorimetric detection optical signal is fainter, and measures
Chip is dual operational amplifier, and liquid level metering device and colorimetric metering device are carried out into level gauge, colorimetric in detection process
The signal fed back during detection carries out photoelectric signal transformation by way of two level amplification, and faint optical signal is converted into microcontroller
Device is capable of the voltage signal of precise acquisition, thus is favorably improved the precision of on-line monitoring system process control.
Embodiment 4
As shown in figure 1, a kind of COD on-line monitoring systems based on embedded system, its structure compared with Example 3, institute
Unlike：The COD on-line monitoring systems include resolution reaction bulb, resolution valve and heater, the resolution valve with it is described
The connection of reaction bulb bottleneck is cleared up, the colorimetric metering device is formed for the detection transmitter and detection receiver of 610nm wavelength, institute
State detection transmitter and the detection receiver is symmetrically installed on the both sides of resolution reaction bulb, by detecting in resolution reaction bulb
The absorbance of reaction solution calculates COD concentration, and the heater is on the outside of the resolution reaction bulb, the detection transmitter
It is connected with the detection receiver with the computation chip, the heater is connected with the microcontroller.The heating
Device be spiral wound it is described resolution reaction bulb on the outside of nichrome heater strip, the nichrome heater strip with it is described
Microcontroller connects.Before resolution reaction, nichrome heater strip heating resolution reaction bulb is driven by pulse voltage, quickly will
The temperature rise in reaction bulb is cleared up, provides optimal reaction temperature for resolution reaction, nichrome heater strip has anti-oxidant energy
The advantages of power is strong, melting temperature is high, resistivity is high, high mechanical strength.And the resolution valve for clearing up the setting of reaction bulb bottleneck will then disappear
Solution reaction is isolated from the outside, and further ensures that resolution reaction is carried out under conditions of high temperature, high pressure, therefore clear up reaction speed and add
It hurry up, the cycle that monitoring system carries out water quality detection greatly shortens.
The colorimetric metering device includes reference transmitter, and the reference transmitter is with the detection transmitter positioned at described
Clear up the same side of reaction bulb and the reference transmitter is positioned at the side of the detection transmitter, the reference transmitter and institute
State computation chip connection.When colorimetric metering device carries out colorimetric detection to resolution reaction solution, reference transmitter is to detecting transmitter
The intensity of transmitting light is detected, and reference transmitter detection signal is carried out opto-electronic conversion and feeds back to microcontroller by computation chip
Device, microcontroller is calibrated accordingly according to computation chip feedback signal to the intensity of detection transmitter transmitting light, so as to real
Show closed-loop control, reduce the fluctuation of detection transmitter emitted luminescence intensity.
Embodiment 5
As shown in figure 1, a kind of COD on-line monitoring systems based on embedded system, its structure compared with Example 4, institute
Unlike：Including temperature collecting device, the resolution reaction bottle wall is filling heat conductive silica gel in double-decker and interlayer, described
Temperature collecting device includes thermal resistance and amplifying circuit is formed, and the thermal resistance is PT100 platinum resistance thermometer sensor,s, the PT100 platinum heat
Resistance is arranged on the resolution and reacted in the interlayer of bottle wall, and the PT100 platinum resistance thermometer sensor,s are connected with the amplifying circuit, described to put
Big circuit is connected with the computation chip.PT100 resistance can be proportional as the rising of temperature is into approximate growth at the uniform velocity
Example relation, thus temperature value can be accurately calculated by detecting PT100 resistance, PT100 thermal resistances pass through amplifying circuit
It is connected with computation chip, further increases sensitivity and the degree of accuracy that monitoring system carries out temperature detection.
Embodiment 6
As shown in figure 1, a kind of COD on-line monitoring systems based on embedded system, including microcontroller, level gauge dress
Put, computation chip, temperature collecting device, wriggling pump drive, heater, colorimetric metering device, wireless communication module with
And touch-screen, in the present embodiment, computation chip uses TM7705；
The wriggling pump drive, the computation chip and the touch-screen are connected with the microcontroller, described
Liquid level metering device and the colorimetric metering device are connected with the computation chip, and the interior transplanting of the microcontroller has embedded
System, the embedded system is using the μ C/OSIII to increase income；
It is attached between the wireless communication module and microcontroller by TTL communication modes, the wireless telecommunications
Module embeds embedded web server, and the light-duty associations of TCP/IP are provided with the μ C/OSIII that increase income that the embedded system uses
Discuss LWIP；
The liquid level metering device includes reflex glass pipe, infrared transmitting tube and infrared receiving tube, described in the present embodiment
Reflex glass pipe is connected with peristaltic pump and multi-channel direction selecting valve, and the infrared transmitting tube and the infrared receiving tube are symmetrically pacified
Mounted in the reflex glass pipe both sides, the infrared transmitting tube and the infrared receiving tube are connected with the computation chip；
The COD on-line monitoring systems include resolution reaction bulb, resolution valve, temperature collecting device and heater, described
Resolution valve connects with the resolution reaction bulb bottleneck, and the colorimetric metering device includes detection transmitter and detection receiver, institute
State detection transmitter and the detection receiver is symmetrically installed on the both sides of resolution reaction bulb, the heater is helical form
The nichrome heater strip being wrapped on the outside of the resolution reaction bulb, the resolution reaction bottle wall is to be filled out in double-decker and interlayer
Heat conductive silica gel is filled, the temperature collecting device includes thermal resistance and amplifying circuit is formed, and the thermal resistance is arranged on the resolution
In the interlayer for reacting bottle wall, the thermal resistance is connected with the amplifying circuit, and the amplifying circuit is connected with the computation chip,
It is described detection transmitter and it is described detection receiver be connected with the computation chip, the nichrome heater strip with it is described micro-
Controller connects；Nichrome heater strip is driven by 24 volts of pulse voltages, by resolution reaction bulb within the regular hour
After temperature is increased to 165 DEG C, resolution valve is closed, heat-insulation pressure keeping is carried out 20 minutes to the solution in resolution reaction bulb, then colorimetric
Metering device carries out absorbance detection to resolution reaction solution.
The on-line monitoring system of the present embodiment will be monitored measurement result to the COD contents in sample water and show on the touchscreen
Show, wireless communication module is sent measurement result to remote server by mobile data network.The present embodiment provides online
Monitoring system can be combined with historical data and be analyzed and processed, and curve map be drawn, in order to which staff is to the COD in waste water
Content tendency has a preliminary judgement.Therefore, a kind of COD on-line monitoring systems based on embedded system that the present embodiment provides
Greatly reduce the data error that the cost being manually monitored and manual operation are brought.
In the present embodiment, touch-screen shows procedure parameter and testing result in real time, for example, the numerical value of extraction water sample,
Temperature, reaction time and COD testing results that heat time, resolution are reacted etc., it is also possible to by touch-screen to each parameter
Value is configured.In the present embodiment, touch-screen is using seven cun of serial ports screens of four-wire resistance type, the man-machine interface of the serial ports screen
All completed by upper computer software, slave computer MCU only needs, by serial ports and equipment interactive instruction, to substantially increase exploitation
Efficiency；
In the present embodiment, the microcontroller is 32 STM32 family chips STM32F407ZGT6, the microcontroller
Using Cortex M4 kernels, band FPU and DSP instruction set, possess up to 192KB on-chip SRAM, band utilizing camera interface
(DCMI), encryption processor (CRYP), USB high speeds OTG, real random number generator, otp memory etc..Meanwhile
STM32F407ZGT6 has faster analog-to-digital conversion rate, lower ADC/DAC operating voltages, 32 bit timing devices, band calendar work(
Can real-time clock (RTC), I O multiplexing is powerful, battery back SRAM and faster USART and SPI communication of 4K bytes
Speed.Also, maximum running frequency possesses ART adaptively real-time accelerators, can reached equivalent to FLASH up to 168Mhz
The performance in zero-waiting cycle.
In the present embodiment, the embedded system in microcontroller is using the μ C/OSIII to increase income, thus source code is visible, and
And source code can be carried out to rewrite secondary compiling.μ C/OSIII, which are one, can cut, can deprive the multitask kernel of type, support
Open and scalability architecture, user can be deleted system kernel task according to the demand of oneself, so as to
The problem of avoiding control system and hardware incompatibility, and without number of tasks limit, thus user can handle simultaneously it is multinomial
Task requests, avoid causing running efficiency of system to reduce because number of tasks is excessive；μ C/OSIII provide real time operating system institute
The institute needed is functional, including resource management, synchronization, task communication etc..
In the present embodiment, the embedded web server in wireless communication module be realize COD on-line monitoring systems with
The key of Internet interconnections, embedded system μ C/OSIII are transplanted to by TCP/IP lightweight protocols LWIP, have μ C/OSIII
Standby network communicating function, access Internet for COD on-line monitoring systems and system support is provided；Microcontroller passes through wireless telecommunications
Module connects network, is easy to user to be interacted by CGI and the webserver, completes the data interaction function of dynamic web page.
Claims (10)
1. a kind of COD on-line monitoring systems based on embedded system, including wriggling pump drive and microcontroller, described compacted
Dynamic pump drive is connected with the microcontroller, it is characterised in that：Also include metering system and touch-screen, the touch-screen and
The metering system is connected with the microcontroller, and being transplanted in the microcontroller has embedded system, the embedded system
System is using the μ C/OSIII to increase income.
2. the COD on-line monitoring systems according to claim 1 based on embedded system, it is characterised in that：Including wireless
Communication module, the wireless communication module are connected with the microcontroller by TTL communication modes, the wireless communication module
Embedded web server is embedded, TCP/IP lightweight protocols are provided with the μ C/OSIII that increase income that the embedded system uses
LWIP。
3. the COD on-line monitoring systems according to claim 1 based on embedded system, it is characterised in that：The metering
System includes computation chip, liquid level metering device, colorimetric metering device and temperature collecting device, the computation chip with it is described micro-
Controller connect, the liquid level metering device, the temperature collecting device and the colorimetric metering device with the metering core
Piece connects.
4. the COD on-line monitoring systems according to claim 3 based on embedded system, it is characterised in that：The liquid level
Metering device includes reflex glass pipe, infrared transmitting tube and infrared receiving tube, the infrared transmitting tube and the infrared receiving tube
Be symmetrically installed on the reflex glass pipe both sides, the infrared transmitting tube and the infrared receiving tube with the computation chip
Connection.
5. the COD on-line monitoring systems according to claim 3 based on embedded system, it is characterised in that：The COD exists
Line monitoring system includes resolution reaction bulb, resolution valve and heater, and the resolution valve connects with the resolution reaction bulb bottleneck,
The heater is on the outside of the resolution reaction bulb, and the colorimetric metering device includes detection transmitter and detection receives
Device, the detection transmitter and the detection receiver are symmetrically installed on the both sides of resolution reaction bulb, the detection transmitter
It is connected with the detection receiver with the computation chip, the heater is connected with the microcontroller.
6. the COD on-line monitoring systems according to claim 5 based on embedded system, it is characterised in that：The resolution
Reaction bulb bottle wall is filling heat conductive silica gel in double-decker and interlayer, and temperature collecting device, the temperature are provided with the interlayer
Degree harvester is connected with the computation chip.
7. the COD on-line monitoring systems according to claim 5 based on embedded system, it is characterised in that：The colorimetric
Metering device includes reference transmitter, and the reference transmitter is with the detection transmitter positioned at the same of the resolution reaction bulb
Side and the reference transmitter are located at the side of the detection transmitter, and the reference transmitter is connected with the computation chip.
8. the COD on-line monitoring systems according to claim 5 based on embedded system, it is characterised in that：The heating
Device be spiral wound it is described resolution reaction bulb on the outside of nichrome heater strip, the nichrome heater strip with it is described
Microcontroller connects.
9. the COD on-line monitoring systems according to claim 6 based on embedded system, it is characterised in that：The temperature
Harvester includes thermal resistance and amplifying circuit is formed, and the thermal resistance is arranged on the resolution and reacted in the interlayer of bottle wall, institute
State thermal resistance to be connected with the amplifying circuit, the amplifying circuit is connected with the computation chip.
10. the COD on-line monitoring systems according to claim 9 based on embedded system, it is characterised in that：The thermoelectricity
Hinder for PT100 platinum resistance thermometer sensor,s.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738385A (en) * | 2019-01-21 | 2019-05-10 | 安徽养和医疗器械设备有限公司 | The detection method of plateau self-adapting standard curve based on 13 infrared spectrometer of carbon |
| CN114002986A (en) * | 2021-11-02 | 2022-02-01 | 保定创锐泵业有限公司 | Intelligent control system of explosion-proof peristaltic pump |
-
2017
- 2017-05-04 CN CN201720490670.5U patent/CN206671184U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738385A (en) * | 2019-01-21 | 2019-05-10 | 安徽养和医疗器械设备有限公司 | The detection method of plateau self-adapting standard curve based on 13 infrared spectrometer of carbon |
| CN114002986A (en) * | 2021-11-02 | 2022-02-01 | 保定创锐泵业有限公司 | Intelligent control system of explosion-proof peristaltic pump |
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