CN201138454Y - Automatic controlling apparatus for measuring temperature, humidity of grain and ventilating the same - Google Patents
Automatic controlling apparatus for measuring temperature, humidity of grain and ventilating the same Download PDFInfo
- Publication number
- CN201138454Y CN201138454Y CNU2008200304327U CN200820030432U CN201138454Y CN 201138454 Y CN201138454 Y CN 201138454Y CN U2008200304327 U CNU2008200304327 U CN U2008200304327U CN 200820030432 U CN200820030432 U CN 200820030432U CN 201138454 Y CN201138454 Y CN 201138454Y
- Authority
- CN
- China
- Prior art keywords
- chip
- pin
- circuit
- hygrometric
- thermometric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model discloses an automatic grain condition temperature measurement, humidity measurement and ventilation controller which is characterized by comprising at least a lower computer responsible for front-end data acquisition and an upper computer responsible for rear-end data processing; the lower computer comprises a temperature measurement circuit, an amplitude-frequency conversion circuit, a humidity measurement circuit, a single-chip microcomputer control circuit and a first interface circuit; the upper computer comprises a computer and a second interface circuit in the same number as the lower computer. The controller not only can be operated easily, but also can conduct batch data processing; beside the controller also has the advantages of high system automation, intelligent degree, good working ability, high reliability and measurement precision.
Description
Technical field
The utility model relates to a kind of grain feelings thermometric, hygrometric and the ventilation controller of agricultural production.
Background technology
Along with improving constantly of China's farm output, the grain reserves amount is increasing, and the safe storage of grain is the significant problem of puzzlement food administration unit always, especially large-scale state-owned grain depot, and its dispersion range is big, and communication distance is far away, unsuitable unified management.
The safety of grain in storing process mainly shows the temperature of grain and the variation of moisture.In case grain makes moist, its metabolism is accelerated and is produced respiration heat, and local cereal temperature raises, and will make grain take place to go rotten rotten.So,, just can grasp the situation of grain as long as monitor the variation of the temperature and humidity of grain.This shows, grain storage is realized that comprehensively accurately temperature, humidity detection are the effective means that guarantee grain storage storage quality.
In early days, the management of the most of grain depot temperature of China, humidity is carried out manual Ventilation Control by artificial observation, recording thermometer and hygrometer reading, and not only labour intensity is big, and it is loaded down with trivial details to work, also, cause the loss of storehouse grain storage food serious usually because detect and report to the police untimelyly.
Along with variation, the electrification of social commodities, the management of cereal temperature and humidity is also had higher requirement.Not only need to control the temperature and the relative humidity of grain depot, also need grasp simultaneously the size of the indexs such as maximum temperature, minimum temperature, dewpoint temperature and absolute humidity that the storehouse storage period may occur.Therefore part grain enterprise has introduced some grain depot monitoring softwares some links of work has been implemented management afterwards, but these software systems are based on the management software of DOS system mostly, the link that covers is extensive inadequately, more can't solve data processing problem in enormous quantities.The computer utility level of grain enterprise is generally not high in addition, all makes the information system management level of grain enterprise lag behind for a long time, can not satisfy the complicated day by day work requirements of present grain enterprise far away.
The utility model content
In view of this, the purpose of this utility model is to provide a kind of grain feelings thermometric, hygrometric and ventilation controller, realizes the automatic monitoring to storehouse grain storage food temperature, humidity, and controls the grain depot ventilating system automatically according to monitoring result and ventilate.
For achieving the above object, the technical solution adopted in the utility model is as follows:
A kind of automatic grain feelings thermometric, hygrometric and ventilation controller is characterized in that comprising that at least one is responsible for the slave computer of front end data acquisition, the host computer that responsible Back end data is handled, and described slave computer comprises:
One temperature sensing circuit by matrix form temperature sensing circuit detected temperatures, and obtains voltage signal output by a resistance sampling;
One amplitude-frequency change-over circuit receives the voltage signal that described temperature sensing circuit is exported, and carries out amplitude-frequency and is converted to temperature measurement signal and output;
One humidity measuring circuit comprises humidity sensor and 555 integrated timers, and humidity sensor detects humidity and passes to 555 integrated timers, carries out amplitude-frequency and is converted to hygrometric signal and output;
One single chip machine controlling circuit comprises a single-chip microcomputer, is responsible for communicating by letter with host computer, carry out thermometric or hygrometric order, and receive described temperature measurement signal and hygrometric signal, and data to be carried out rough handling pass to host computer again, the control signal that the response host computer sends is carried out ventilation commands;
One first interface circuit is responsible for finishing the mutual conversion of Transistor-Transistor Logic level signal and RS-485 level signal between described single-chip microcomputer and host computer;
Described host computer comprises:
One computing machine is responsible for communicating by letter with slave computer, receives the data that described single chip machine controlling circuit is uploaded, and controls described single chip machine controlling circuit and carries out thermometric, hygrometric or ventilation commands;
Have second interface circuit of equal number with slave computer, be responsible between corresponding with it slave computer and computing machine, finishing the mutual conversion of RS-485 level signal and RS-232 level signal.
A kind of grain feelings of the utility model thermometric, hygrometric and ventilation controller include several slave computers usually, and system has distributed different reference address for these several slave computers.When a plurality of slave computer, can expand second interface circuit and the slave computer coupling of respective numbers.A host computer can be with 256 slave computers at most, and every slave computer can be surveyed 256 check points.Host computer can carry out full-duplex communication with each slave computer as Centroid, is responsible for finishing address control frame transmission, Data Receiving, aftertreatment and demonstration, preservation etc.
During work, host computer sends the instruction of 4 bit data, and front two is an address code, and as the gating signal of each slave computer, back two is command code, allows single-chip microcomputer carry out thermometric, hygrometric or ventilation commands.Comprise two kinds of frames in the system: address control frame and Frame.The address control frame is used for downlink transfer, to realize the addressing of host computer to slave computer; Frame is used for uplink, is used for each slave computer to the host computer echo back data.Principle of work of the present utility model is as follows: slave computer detects the 8bit address in the control frame of address after receiving the address frame control of host computer transmission, if consistent with this machine address, then carries out the thermometric test command.Temperature sensing circuit adopts the matrix form testing circuit, and two groups of analog switches are respectively applied for the row and column of gating thermometric matrix, diode in series and temperature sensor are set as check point on the point of crossing of each row, column.When single-chip microcomputer was carried out the thermometric order, single chip machine controlling circuit was controlled two groups of analog switches to select different check points.The voltage signal that temperature sensing circuit passes through to export the reflection temperature level after the temperature sensor detected temperatures obtains temperature measurement signal and delivers to single chip machine controlling circuit to the amplitude-frequency change-over circuit after the amplitude-frequency conversion.When single-chip microcomputer was carried out the hygrometric order, humidity measuring circuit detected by humidity sensor and is converted to the hygrometric signal after the humidity and delivers to single chip machine controlling circuit.Single chip machine controlling circuit is counted the frequency of temperature measurement signal or hygrometric signal, transfer to computing machine by first, second interface circuit again, computing machine compares data that obtain and the data that set in advance, if temperature, humidity are excessive, automatically transmit control signal to single chip machine controlling circuit, drive ventilating system to silo cooling, dehumidifying by single chip machine controlling circuit.
The beneficial effects of the utility model are:
Employing is the data acquisition center of core with the single-chip microcomputer and is that the data processing centre (DPC) of core combines with the computing machine, computing machine in the pulpit transmits control signal to the Single-chip Controlling thermometric by interface circuit, the hygrometric operation, the temperature that single-chip microcomputer collects, the hygrometric signal is sent to computing machine by interface circuit, computing machine is monitored in real time to the temperature and humidity of each collection point, work as humidity, when temperature is excessive, computing machine transmits control signal automatically to single-chip microcomputer, lower the temperature to silo by the Micro Controller Unit (MCU) driving ventilating system, dehumidifying, and can revise and adjust setting value and alarming value at any time, not only simple to operate but also can carry out data processing in enormous quantities, system automation, intelligent degree height.
The utility model adopts the transmission of RS-485 bus type, has good noise immunity, long Distance Transmission ability and multistation transmittability.
Temperature detection adopts the matrix form metering circuit, substitutes general bridge-type metering circuit, and field wiring is simple, the measuring accuracy height.The analog switch group adopts analog switch chip CD4067, integrated level height; Temperature sensor adopts thermistor, and the measuring accuracy height can reach ± 0.2 ℃.
The amplitude-frequency change-over circuit adopts chip LM331, and the linearity is good, conversion precision height.
Humidity sensor adopts capacitive moisture sensor, and good operating stability, reliability height, measuring accuracy have very high cost performance up to ± 2%RH.
Description of drawings
Below in conjunction with accompanying drawing the utility model embodiment is elaborated.
Fig. 1: the structured flowchart of the automatic grain feelings of the utility model thermometric, hygrometric and ventilation controller;
Fig. 2: the circuit structure schematic diagram of the automatic grain feelings of the utility model thermometric, hygrometric and ventilation controller;
Fig. 3: the functional block diagram of 555 integrated timers and pinouts;
Fig. 4: SN75LBC184 chip pin figure;
Fig. 5: MAX202 chip pin figure.
Fig. 6: temperature sensing circuit schematic diagram
Embodiment
As shown in Figure 1, a kind of automatic grain feelings thermometric, hygrometric and ventilation controller comprise slave computer 1 and host computer 2.Slave computer 1 comprises interconnective temperature sensing circuit 101, amplitude-frequency change-over circuit 102, humidity measuring circuit 103, single chip machine controlling circuit 104, first interface circuit 105.Host computer 2 comprises that computing machine 201 and second interface circuit, 202, the first interface circuits 105 connect single chip machine controlling circuit 105, the first interface circuits 105 and link to each other with second interface circuit 202, and second interface circuit 202 links to each other with computing machine 201.When a plurality of slave computer 1 of needs, can expand second interface circuit 202 and a plurality of slave computers 1 couplings of respective numbers.
The circuit structure schematic diagram as shown in Figure 2.Single chip machine controlling circuit 104 is made up of single-chip microcomputer and peripheral circuit thereof.Single-chip microcomputer adopts 51 serial Flash single chip computer AT 89C51 of American ATMEL, and it is low that it has a cost, the characteristics that performance is high.Its inner integrated enhancement mode 8051 kernels, the Flash ROM of the RAM of 128Byte, 4Kbyte, 2 16bit timers, 1 full duplex UART mouth, 2 exterior interrupt, 32 universaling I/O ports, the device clock reaches as high as 24MHz.First interface circuit 105 comprises a RS-485 electric level interface chip, and second interface circuit 202 comprises interconnective the 2nd RS-485 electric level interface chip and RS-232 level transferring chip.The SN75LBC184 that first, second RS-485 electric level interface chip adopts National Semiconductor to produce, the MAX202 that the RS-232 level transferring chip adopts National Semiconductor to produce.It is that 11,12 pin are connected that 1,4 pin of the one RS-485 electric level interface chip are held with RXD end, the TXD of single-chip microcomputer respectively, and 2,3 pin are connected with the WR end of single-chip microcomputer.6,7 pin of the 2nd RS-485 electric level interface chip connect 6,7 pin of a RS-485 electric level interface chip respectively; 1,4 pin of the 2nd RS-485 electric level interface chip are connected with 13,14 pin of RS-232 level transferring chip respectively, 2,3 pin are connected with 7 pin of RS-232 level transferring chip, and 12,11 pin of RS-232 level transferring chip are connected with RXD end, the TXD end of the serial port of computing machine 201 (PC among Fig. 2) respectively.
11 pin of single-chip microcomputer receive 4 bit data by 4 pin of a RS-485 electric level interface chip from host computer, and front two is an address code, and as the slave computer gating signal, back two is command code, allow single-chip microcomputer carry out thermometric, hygrometric or ventilation commands.When receiving the thermometric order, single-chip microcomputer 1～4 pin, 5～8 pin are exported the row, column signal respectively, certain check point of the thermometric matrix of gating temperature sensing circuit 101 carries out thermometric, by amplitude-frequency change-over circuit 102 temperature measurement signal is sent to single-chip microcomputer 13 pin, after calculating, by the output of single-chip microcomputer 10 pin, pass to computing machine 201 by first interface circuit 105 and second interface circuit 202.When single-chip microcomputer received the hygrometric order, 15 pin received the hygrometric signal from humidity measuring circuit 103, also by the output of 10 pin, passed to computing machine 201 by first interface circuit 105 and second interface circuit 202 after calculating.The data of 201 pairs of transmission of computing machine compare with the data that set in advance.If temperature, humidity are excessive, then output control signals to single-chip microcomputer 11 pin, ventilate from 14 pin output drive signal to ventilating systems after the single-chip microcomputer received signal, K1 promptly represents the blower fan pilot relay among the figure.18,19 pin of single-chip microcomputer connect oscillatory circuit.
In the amplitude-frequency change-over circuit 102, deliver to 7 pin of the amplitude-frequency conversion chip LM331 that U.S. state half company produces after the low-pass filter circuit filtering that the voltage signal that obtains of sampling connects to form via R33, C31, R34, C34 on the resistance R 32, carry out amplitude-frequency conversion back outputs to single-chip microcomputer from 3 pin of LM331 13 pin (being the INT1 end).
Each pin function of LM331 is described as follows: 1 pin is the pulse current output terminal, and inside is equivalent to pulsed constant current supply, and pulse width is identical with the internal monostable circuit.2 pin are regulated for the reproduced pulse current amplitude, and RS is more little, and output current is big more.3 pin are the pulse voltage output terminal, the OC door, and the same monostable of output pulse width and phase place, the time spent can unsettled or ground connection.4 pin ground connection, 5 pin are the external timing constant of monostable RC.6 pin are monostable trigger pulse input end, and it is effective to be lower than 7 pin voltage triggered, require the input negative pulse width less than monostable output pulse width Tw.7 pin are comparator reference voltage, are used to be provided with effective triggering level height of input pulse.8 pin are power Vcc.The normal working voltage scope is 4～40V, and the linearity is good, and maximum nonlinear distortion is less than 0.01%, and frequency of operation is low to have better linearity to 0.1Hz fashion.The high digital resolution of conversion precision can reach 12.
In the humidity measuring circuit 103, humidity sensor adopts humidity sensor to adopt capacitive moisture sensor C20, and model is HS1101, is connected between 2 pin of earth terminal and 555 integrated timers.2 pin are the triggering input pin of 555 integrated timers.Capacitive moisture sensor good operating stability, reliability height, measuring accuracy have fabulous linearity output up to ± 2%RH.1～99%RH humidity range ,-40 to 100 degrees centigrade temperature working range.5 seconds response times, humidity output temperature influence is minimum.Be suitable for the occasion that low humidity and dew point are measured to be needed, as dry gas in drying box, the cable gas-feeding equipment.Anticorrosive property gas, normal temperature use and need not temperature compensation.
Be the oscillation period of circuit: T=(R
20+ 2R
21) C
20Ln2;
Oscillation frequency is:
The value that humidity changes capacitive moisture sensor C20 just changes, and the output signal of 555 timers, 3 pin is that the frequency f of hygrometric signal also changes thereupon.This hygrometric signal is sent to 15 pin (being the T1 end) of single-chip microcomputer and counts.
The functional block diagram and the pinouts of 555 integrated timers are seen Fig. 3.555 integrated timers are a kind of analog functuion and logic function to be integrated in the linear integrated circuit of the novelty on the same silicon chip dexterously, generally adopt ceramic dip form.Functional block diagram by 555 as can be known, the voltage divider that the 5k Ω resistance that 555 timers are mainly equated by three strictnesses is formed (555 so and gain the name), accurate level comparator A1 and A2, R-S trigger, reset transistor T2, power output stage, discharge tube T1 etc. partly form.Its principle of work is as follows: when 6 pin current potentials are higher than 2/3Vcc, and because of A1 inverting input reference potential equals 2/3Vcc, institute's above comparer A1 output high level; If this at present comparer A2 do not have trigger pip input, promptly 2 pin current potentials are higher than 1/3Vcc, A2 output low level then, the R-S trigger reset, the Q end is high level, 555 the 3rd pin output low levels, and discharge transistor T1 conducting.Then, even 6 pin current potential step-downs, this state also remains unchanged always, up to 2 pin input trigger pip.If trigger negative pulse of input end 2 inputs, make its current potential be lower than 1/3Vcc, then A2 output high level makes the set of R-S trigger, i.e. 3 pin output high level; Meanwhile, discharge transistor T1 is become by conducting and ends.This state also remains unchanged always, repeats said process when the level of 2/3Vcc appears being higher than in 6 pin more again.
Automatically measured signal to be delivered to host computer 2 in grain feelings thermometric, hygrometric and the ventilation controller, will receive the control signal that host computer 2 transmits simultaneously.What computing machine 201 adopted is the RS-232 serial communication interface, and the RS-485 level that uses in the communication, single chip machine controlling circuit 104 can not directly be supported the RS-232 level, so need the external interface circuit to carry out level match.First interface circuit 105 comprises a RS-485 electric level interface chip, second interface circuit 202 comprises interconnective the 2nd a RS-485 electric level interface chip and a RS-232 level transferring chip, first, the SN75LBC184 that the 2nd RS-485 electric level interface chip adopts National Semiconductor to produce, the MAX202 that the RS-232 level transferring chip adopts National Semiconductor to produce, 1 of the one RS-485 electric level interface chip, 4 pin respectively with the RXD of described single-chip microcomputer end, TXD holds connection, they are 2 years old, 3 pin are connected 6 of the 2nd RS-485 electric level interface chip with the WR end of single-chip microcomputer, 7 pin connect 6 of a RS-485 electric level interface chip respectively, 7 pin; 1,4 pin of the 2nd RS-485 electric level interface chip are connected with 13,14 pin of RS-232 level transferring chip respectively, 2,3 pin are connected with 7 pin of RS-232 level transferring chip, and 12,11 pin of RS-232 level transferring chip are connected with RXD end, the TXD end of computing machine 201 serial ports respectively.
By the level conversion effect of interface circuit, adopt 485 bus transfer can realize the communication function of single chip machine controlling circuit 103 and computing machine 201.
The transmission of RS-485 bus type has good noise immunity, and therefore long transmission range and multistation ability become the first-selected serial line interface of this device.Only need two lines and the half-duplex network that interface is formed is general, so interface all adopts the Shielded Twisted Pair transmission.The RS-232 interface connector adopts the 9 core plug seats of DB-9, links to each other with computing machine 201.Have two to overlap that independently level translator is available in the MAX202 chip, use wherein one group here as the sending and receiving data, another group is as the control signal of transceive data.
As shown in Figure 4, the SN75LBC184 integrated circuit has transition high pressure inhibit feature, can resist thunderbolt, static discharge, avoids impacting because of the improper high-voltage pulse that the alternating current fault causes.A, B are the RS-485 bus interface, and DI is a transmitting terminal, and RO is a receiving end, are connected with TXD, the RXD of serial port of single chip computer respectively, and RE, DE are the transmitting-receiving Enable Pin, are controlled as transmitting-receiving by 16 pin of single-chip microcomputer.
As shown in Figure 5, MAX202 use+5V power voltage supply has voltage multiplier and voltage changer in the sheet, and output RS-232 needs ± the 10V level, and there are two transmitters and two receivers in inside.But MAX202 only needs just operate as normal of four external capacitor C71, C72, C74, C75.Four electric capacity should be selected only stone ceramic disc capacitor that volume is less, temperature influence is less.Capacitor C 73 is decoupling capacitors of chip MAX202, and its effect is with the noise jamming filtering from power supply, guarantee simultaneously power supply to the power supply of this partial circuit steadily so that obtain high-quality communication effect.Particularly, use the electric capacity identical to make+decoupling over the ground of 5V power supply with the charge pump capacitance for the application scenario of power supply noise-sensitive.
Fig. 6 illustrates the temperature sensing circuit schematic diagram.Adopt the matrix form testing circuit, the row, column of two groups of analog switch difference gating thermometric matrixes.When choosing each row, every slave computer can be surveyed 16 groups, can survey 16 points for every group.Adopt the matrix form testing circuit can make that the system construction field wiring is simple, measuring accuracy is high, can reach ± 0.2 ℃.The analog switch chip CD4067 that analog switch selects for use U.S. state half company to produce, temperature sensor adopts the higher thermistor of cost performance.
The principle of work of testing circuit: in conjunction with Fig. 2, a certain output signal of single-chip microcomputer 1～4 pin gating CD4067 (1), certain delegation in the promptly selected thermometric matrix; The a certain output signal of single-chip microcomputer 5～8 pin gating CD4067 (2), a certain row in the promptly selected thermometric matrix, like this with regard to gating some check points, on this check point temperature probe is set, (resistance R 32 of RM001～RM256) and resistance 1K becomes voltage signal to output to amplitude-frequency change-over circuit 102 conversion of signals of temperature of reaction size to thermistor.
Claims (9)
1. an automatic grain feelings thermometric, hygrometric and ventilation controller is characterized in that comprising that at least one is responsible for the slave computer of front end data acquisition (1), the host computer (2) that responsible Back end data is handled, and described slave computer (1) comprising:
One temperature sensing circuit (101) by matrix form temperature sensing circuit detected temperatures, and obtains voltage signal output by a resistance sampling;
One amplitude-frequency change-over circuit (102) receives the voltage signal that described temperature sensing circuit (101) is exported, and carries out amplitude-frequency and is converted to temperature measurement signal and output;
One humidity measuring circuit (103) comprises humidity sensor and 555 integrated timers, and humidity sensor detects humidity and passes to 555 integrated timers, carries out amplitude-frequency and is converted to hygrometric signal and output;
One single chip machine controlling circuit (104), comprise a single-chip microcomputer, be responsible for communicating by letter with host computer (2), carry out thermometric or hygrometric order, and receive described temperature measurement signal and hygrometric signal, data are carried out rough handling pass to host computer (2) again, the control signal that response host computer (2) sends is carried out ventilation commands;
One first interface circuit (105) is responsible for finishing the mutual conversion of Transistor-Transistor Logic level signal and RS-485 level signal between described single-chip microcomputer and host computer (2);
Described host computer (2) comprising:
One computing machine (201) is responsible for communicating by letter with slave computer (1), receives the data that described single chip machine controlling circuit (104) is uploaded, and controls described single chip machine controlling circuit (104) and carries out thermometric, hygrometric or ventilation commands;
Have second interface circuit (202) of equal number with slave computer (1), be responsible between corresponding with it slave computer (1) and computing machine (201), finishing the mutual conversion of RS-485 level signal and RS-232 level signal.
2. automatic grain feelings thermometric as claimed in claim 1, hygrometric and ventilation controller, it is characterized in that described first interface circuit (105) comprises a RS-485 electric level interface chip, second interface circuit (202) comprises interconnective the 2nd a RS-485 electric level interface chip and a RS-232 level transferring chip, first, the SN75LBC184 that the 2nd RS-485 electric level interface chip adopts National Semiconductor to produce, the MAX202 that the RS-232 level transferring chip adopts National Semiconductor to produce, 1 of the one RS-485 electric level interface chip, 4 pin respectively with the RXD of described single-chip microcomputer end, TXD holds connection, they are 2 years old, 3 pin are connected 6 of the 2nd RS-485 electric level interface chip with the WR end of single-chip microcomputer, 7 pin connect 6 of a RS-485 electric level interface chip respectively, 7 pin; 1,4 pin of the 2nd RS-485 electric level interface chip are connected with 13,14 pin of RS-232 level transferring chip respectively, 2,3 pin are connected with 7 pin of RS-232 level transferring chip, and 12,11 pin of RS-232 level transferring chip are connected with RXD end, the TXD end of computing machine (201) serial port respectively.
3. automatic grain feelings thermometric as claimed in claim 1, hygrometric and ventilation controller, it is characterized in that described matrix form temperature sensing circuit comprises two groups of analog switches, two groups of analog switches are respectively applied for the row and column of gating thermometric matrix under the control of single chip machine controlling circuit (104), on the row, column point of crossing of each thermometric matrix, be provided with a diode and a temperature sensor of series connection, by a resistance sampling of connecting with it, be converted to described voltage signal and output to described amplitude-frequency change-over circuit (102) after the temperature sensor detected temperatures.
4. automatic grain feelings thermometric as claimed in claim 3, hygrometric and ventilation controller is characterized in that described two groups of analog switches adopt analog switch chip CD4067, and temperature sensor adopts thermistor.
5. automatic grain feelings thermometric as claimed in claim 1, hygrometric and ventilation controller, it is characterized in that described amplitude-frequency change-over circuit comprises a low-pass filter circuit and an amplitude-frequency conversion chip, the LM331 that the amplitude-frequency conversion chip adopts National Semiconductor to produce, the voltage signal of described temperature sensing circuit output is input to 7 pin of amplitude-frequency conversion chip after low-pass filter circuit filtering, carry out amplitude-frequency conversion back outputs to described single-chip microcomputer from 3 pin of amplitude-frequency conversion chip INT1 end.
6. automatic grain feelings thermometric as claimed in claim 1, hygrometric and ventilation controller, it is characterized in that described humidity sensor adopts capacitive moisture sensor, described capacitive moisture sensor is connected between 2 pin of earth terminal and 555 integrated timers, and described hygrometric signal outputs to the T1 end of described single-chip microcomputer from 3 pin of 555 timers.
7. automatic grain feelings thermometric as claimed in claim 1, hygrometric and ventilation controller is characterized in that the T0 pin of described single-chip microcomputer is connected with ventilating system.
8. automatic grain feelings thermometric as claimed in claim 1, hygrometric and ventilation controller is characterized in that the quantity of described slave computer (1) is not more than 256.
9. as the arbitrary described automatic grain feelings thermometric of claim 1 to 8, hygrometric and ventilation controller, it is characterized in that the AT89C51 single-chip microcomputer that described single-chip microcomputer adopts American ATMEL to produce.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200304327U CN201138454Y (en) | 2008-01-04 | 2008-01-04 | Automatic controlling apparatus for measuring temperature, humidity of grain and ventilating the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200304327U CN201138454Y (en) | 2008-01-04 | 2008-01-04 | Automatic controlling apparatus for measuring temperature, humidity of grain and ventilating the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201138454Y true CN201138454Y (en) | 2008-10-22 |
Family
ID=40039137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200304327U Expired - Fee Related CN201138454Y (en) | 2008-01-04 | 2008-01-04 | Automatic controlling apparatus for measuring temperature, humidity of grain and ventilating the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201138454Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102236346A (en) * | 2010-05-05 | 2011-11-09 | 南通大学 | RS485 bus-based grain depot natural ventilation control system |
| CN103869793A (en) * | 2014-03-31 | 2014-06-18 | 李松年 | Granary monitoring and early warning method |
| CN103869792A (en) * | 2014-03-31 | 2014-06-18 | 李松年 | Number bus remote collection unit for storeroom monitoring and early warning system |
| CN104663877A (en) * | 2015-02-15 | 2015-06-03 | 安徽大洋自动化科技有限公司 | Intelligent grain drying control method |
| CN109478057A (en) * | 2016-05-09 | 2019-03-15 | 强力物联网投资组合2016有限公司 | Method and system for industrial Internet of Things |
| CN110764558A (en) * | 2019-10-17 | 2020-02-07 | 上海方德自动化设备股份有限公司 | Intelligent respirator and control method thereof |
| US11493903B2 (en) | 2016-05-09 | 2022-11-08 | Strong Force Iot Portfolio 2016, Llc | Methods and systems for a data marketplace in a conveyor environment |
| US11663442B2 (en) | 2016-05-09 | 2023-05-30 | Strong Force Iot Portfolio 2016, Llc | Methods and systems for detection in an industrial Internet of Things data collection environment with intelligent data management for industrial processes including sensors |
| US11774944B2 (en) | 2016-05-09 | 2023-10-03 | Strong Force Iot Portfolio 2016, Llc | Methods and systems for the industrial internet of things |
-
2008
- 2008-01-04 CN CNU2008200304327U patent/CN201138454Y/en not_active Expired - Fee Related
Cited By (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102236346A (en) * | 2010-05-05 | 2011-11-09 | 南通大学 | RS485 bus-based grain depot natural ventilation control system |
| CN103869793A (en) * | 2014-03-31 | 2014-06-18 | 李松年 | Granary monitoring and early warning method |
| CN103869792A (en) * | 2014-03-31 | 2014-06-18 | 李松年 | Number bus remote collection unit for storeroom monitoring and early warning system |
| CN104663877A (en) * | 2015-02-15 | 2015-06-03 | 安徽大洋自动化科技有限公司 | Intelligent grain drying control method |
| US11586188B2 (en) | 2016-05-09 | 2023-02-21 | Strong Force Iot Portfolio 2016, Llc | Methods and systems for a data marketplace for high volume industrial processes |
| US11646808B2 (en) | 2016-05-09 | 2023-05-09 | Strong Force Iot Portfolio 2016, Llc | Methods and systems for adaption of data storage and communication in an internet of things downstream oil and gas environment |
| CN109478057B (en) * | 2016-05-09 | 2022-02-25 | 强力物联网投资组合2016有限公司 | Method and system for industrial internet of things |
| US11340573B2 (en) | 2016-05-09 | 2022-05-24 | Strong Force Iot Portfolio 2016, Llc | Methods and systems for the industrial internet of things |
| US11493903B2 (en) | 2016-05-09 | 2022-11-08 | Strong Force Iot Portfolio 2016, Llc | Methods and systems for a data marketplace in a conveyor environment |
| US11507064B2 (en) | 2016-05-09 | 2022-11-22 | Strong Force Iot Portfolio 2016, Llc | Methods and systems for industrial internet of things data collection in downstream oil and gas environment |
| US11507075B2 (en) | 2016-05-09 | 2022-11-22 | Strong Force Iot Portfolio 2016, Llc | Method and system of a noise pattern data marketplace for a power station |
| US11573558B2 (en) | 2016-05-09 | 2023-02-07 | Strong Force Iot Portfolio 2016, Llc | Methods and systems for sensor fusion in a production line environment |
| US11573557B2 (en) | 2016-05-09 | 2023-02-07 | Strong Force Iot Portfolio 2016, Llc | Methods and systems of industrial processes with self organizing data collectors and neural networks |
| US11586181B2 (en) | 2016-05-09 | 2023-02-21 | Strong Force Iot Portfolio 2016, Llc | Systems and methods for adjusting process parameters in a production environment |
| CN109478057A (en) * | 2016-05-09 | 2019-03-15 | 强力物联网投资组合2016有限公司 | Method and system for industrial Internet of Things |
| US11609553B2 (en) | 2016-05-09 | 2023-03-21 | Strong Force Iot Portfolio 2016, Llc | Systems and methods for data collection and frequency evaluation for pumps and fans |
| US11609552B2 (en) | 2016-05-09 | 2023-03-21 | Strong Force Iot Portfolio 2016, Llc | Method and system for adjusting an operating parameter on a production line |
| US12039426B2 (en) | 2016-05-09 | 2024-07-16 | Strong Force Iot Portfolio 2016, Llc | Methods for self-organizing data collection, distribution and storage in a distribution environment |
| US11663442B2 (en) | 2016-05-09 | 2023-05-30 | Strong Force Iot Portfolio 2016, Llc | Methods and systems for detection in an industrial Internet of Things data collection environment with intelligent data management for industrial processes including sensors |
| US11728910B2 (en) | 2016-05-09 | 2023-08-15 | Strong Force Iot Portfolio 2016, Llc | Methods and systems for detection in an industrial internet of things data collection environment with expert systems to predict failures and system state for slow rotating components |
| US11755878B2 (en) | 2016-05-09 | 2023-09-12 | Strong Force Iot Portfolio 2016, Llc | Methods and systems of diagnosing machine components using analog sensor data and neural network |
| US11770196B2 (en) | 2016-05-09 | 2023-09-26 | Strong Force TX Portfolio 2018, LLC | Systems and methods for removing background noise in an industrial pump environment |
| US11774944B2 (en) | 2016-05-09 | 2023-10-03 | Strong Force Iot Portfolio 2016, Llc | Methods and systems for the industrial internet of things |
| US11791914B2 (en) | 2016-05-09 | 2023-10-17 | Strong Force Iot Portfolio 2016, Llc | Methods and systems for detection in an industrial Internet of Things data collection environment with a self-organizing data marketplace and notifications for industrial processes |
| US11797821B2 (en) | 2016-05-09 | 2023-10-24 | Strong Force Iot Portfolio 2016, Llc | System, methods and apparatus for modifying a data collection trajectory for centrifuges |
| US11838036B2 (en) | 2016-05-09 | 2023-12-05 | Strong Force Iot Portfolio 2016, Llc | Methods and systems for detection in an industrial internet of things data collection environment |
| US11836571B2 (en) | 2016-05-09 | 2023-12-05 | Strong Force Iot Portfolio 2016, Llc | Systems and methods for enabling user selection of components for data collection in an industrial environment |
| US11996900B2 (en) | 2016-05-09 | 2024-05-28 | Strong Force Iot Portfolio 2016, Llc | Systems and methods for processing data collected in an industrial environment using neural networks |
| CN110764558A (en) * | 2019-10-17 | 2020-02-07 | 上海方德自动化设备股份有限公司 | Intelligent respirator and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201138454Y (en) | Automatic controlling apparatus for measuring temperature, humidity of grain and ventilating the same | |
| US20220245972A1 (en) | Automobile diagnosis device, system and method | |
| CN106093631B (en) | A kind of IP setting methods for the Testing System for Electronic Equipment having position identification | |
| CN107389746A (en) | Grain heap moisture content online test method and system | |
| CN104391480A (en) | Expert system based numerically-controlled machine tool fault diagnosis system | |
| CN103808591A (en) | Online detection method for water in continuous grain drying process | |
| CN103645443A (en) | Storage battery measurement and control system | |
| CN204631602U (en) | Crop dryer nurse's formula intelligent remote maintenance system | |
| CN102200763A (en) | Grain status monitoring system based on fieldbus | |
| CN106765925A (en) | Air monitoring system | |
| CN103869794A (en) | Storehouse monitoring and early warning system | |
| CN206858674U (en) | A kind of aluminium electrolysis anode guide rod distributed current Detection ＆ Controling apparatus and system | |
| CN101984726A (en) | Grain condition measurement and control system based on wireless sensor network | |
| CN106225929A (en) | A kind of heat supply network infrared temperature measurement system | |
| CN105241503A (en) | Comprehensive humidity detection system | |
| CN104467668A (en) | Multi-channel photovoltaic module generating capacity test data collection system | |
| CN103869792A (en) | Number bus remote collection unit for storeroom monitoring and early warning system | |
| CN206755489U (en) | Air monitoring system | |
| CN106292610B (en) | Intelligent home control system | |
| CN108709916A (en) | A kind of fruits and vegetables heated-air drying moisture content on-line measurement device and measurement method | |
| CN108225599A (en) | A kind of super capacitor temp detecting controller | |
| CN208076439U (en) | A kind of system measuring moisture | |
| CN207231550U (en) | A kind of online moisture of high accuracy grain and temperature monitor | |
| CN207423865U (en) | A kind of combustible gas probe | |
| CN109708691B (en) | Multichannel temperature and stress strain online measurement integrated system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |