CN201193949Y - Grain situation detecting instrument - Google Patents
Grain situation detecting instrument Download PDFInfo
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- CN201193949Y CN201193949Y CNU2008200800473U CN200820080047U CN201193949Y CN 201193949 Y CN201193949 Y CN 201193949Y CN U2008200800473 U CNU2008200800473 U CN U2008200800473U CN 200820080047 U CN200820080047 U CN 200820080047U CN 201193949 Y CN201193949 Y CN 201193949Y
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Abstract
The utility model discloses a grain situation detector which comprises a casing. A gas collecting inlet and a gas collecting outlet are arranged on the casing in which a detection circuit is arranged. The detection circuit comprises a single chip computer, a temperature and humidity sensor, a carbon dioxide sensor and a micro air pump. The temperature and humidity sensor and the carbon dioxide sensor are both connected with the single chip computer which is connected with the micro air pump through a power drive unit. The detector can be held by hand to use, is convenient in carrying, has fast detection, simple operation and accurate result, and can meet the requirements of grain situation detection in Chinese grain depots. The detector is suitable for early detecting stored grain eumycete and insects and estimating the ventilation effect to guarantee the safety of the barn managing staffs.
Description
Technical field
The utility model relates to a kind of detector, specifically, relates to a kind of detector of measuring at the grain that caused by fungi and insect heap humiture and carbon dioxide content situation of change.
Background technology
China is a grain-production big country, and grain yield was more than 9,500 hundred million jin in 2000, and the occupancy volume per person is more than 700 jin, breaks through 10,000 hundred million jin of high pointes in 2007.The grain storage quality safety is concerning Chinese national economy development and social stability, and closely bound up with the people's livelihood, it obtains showing great attention to of the leader of Party and government always.Existing country of China and local grain depot are thousands of at present, are distributed in all parts of the country.Cause that in China the loss of grain storage mainly contains mouse, insect and fungi, in recent years, along with the increase of China's grain depot construction funds invested, the grain storage condition has obtained tangible improvement, some The application of new technique in addition, the harm of China grain storage mouse and insect can obtain effectively controlling in advance.But the harm of grain storage fungi is not resolved always, and it has influenced the stored grain safety of China.At present, China grain depot China Oil and Food Import and Export Corporation feelings detect mainly carries out the prediction of grain feelings with the method for surveying the grain temperature, this method is used for the prediction of grain feelings and has following some deficiency: 1) grain is a kind of poor conductor, predict the grain feelings by the method for grain being carried out thermometric, exist serious lag, make the staff can not in time take measures to handle; 2) some fungi to produce heat in growth course very low, as Aspergillus glaucus, so can't carry out the prediction of comprehensive grain storage fungi harm with present survey grain temperature method; 3) this survey grain temperature method seriously is subjected to such environmental effects, and precision is not high; 4) the mensuration temperature range is little.Therefore, design a kind of fast, accurately, grain feelings detecting instrument that precision is high, to solving the problem that present China grain feelings context of detection exists and reducing the grain storage loss, have crucial meaning.
The utility model content
The purpose of this utility model is to provide a kind of grain feelings detector, and this detector detects carbon dioxide content and the humiture in the grain heap, and accuracy of detection height, but strong guarantee grain storage quality improve China's stored grain safety rank.
In order to achieve the above object, the utility model has adopted following technical scheme:
A kind of grain feelings detector, it is characterized in that: it comprises housing, this housing is provided with gas collecting inlet and gas collecting outlet, be provided with testing circuit in this housing, this testing circuit comprises single-chip microcomputer, Temperature Humidity Sensor, carbon dioxide sensor and micro air pump, wherein: this Temperature Humidity Sensor all links to each other with single-chip microcomputer with carbon dioxide sensor, and this single-chip microcomputer links to each other with micro air pump by power drive unit.
Also be provided with air strainer, first in the described housing and detect the air chamber and the second detection air chamber, described Temperature Humidity Sensor is located at first and is detected in the air chamber, described carbon dioxide sensor is located at second and is detected in the air chamber, this air strainer, the first detection air chamber, second detect air chamber, described micro air pump links to each other by air flue, and are located between described gas collecting inlet and the outlet of described gas collecting.In the practical application, described gas collecting inlet links to each other with the air intake opening of described air strainer through air flue, the gas outlet of described air strainer links to each other with described first air intake opening that detects air chamber through air flue, described first gas outlet of detecting air chamber links to each other with described second air intake opening that detects air chamber through air flue, described second gas outlet of detecting air chamber links to each other with the input port of described micro air pump through air flue, and the corresponding described gas collecting outlet of the delivery outlet of described micro air pump is placed.Described first detects the probe of the air intake opening of air chamber away from the described Temperature Humidity Sensor that is provided with in it, and the probe of described Temperature Humidity Sensor is parallel to described first air-flow direction that detects in the air chamber and places.Described first air intake opening and the gas outlet of detecting air chamber shifts to install.
In the described testing circuit: an IO pin of described single-chip microcomputer and the output terminal of described carbon dioxide sensor join, and in addition two IO pins of described single-chip microcomputer join with serial clock input end, the serial data input/output terminal of described Temperature Humidity Sensor respectively; Described power drive unit is a PMOS transistor, and the transistorized grid of this PMOS IO pin corresponding with it on resistance and described single-chip microcomputer joins, and the control end of this PMOS transistor drain and described micro air pump joins.
Also be provided with LCDs and button on the described housing, this LCDs all links to each other with described single-chip microcomputer by interface circuit with button.Described single-chip microcomputer links to each other with PC by RS232 interface or USB interface, and described single-chip microcomputer links to each other with grain condition monitoring master station by RS485 interface or CAN bus.
The utility model has the advantages that:
1, consider that air pump belongs to power component, in the process of impeller high speed rotating suction sample gas, air pump meeting distribute heat, the heat that distributes can exert an influence to the temperature of sample gas, so, the rearmounted mode of pump is adopted in the gas circuit design of the utility model grain feelings detector, be about to the least significant end that micro air pump is arranged on gas circuit and (refer to be arranged on air strainer, first detects air chamber, second detects the back of air chamber), adopt the forced-ventilated mode that sample gas is sampled, this gas circuit design not only can reach the purpose of draws sample gas, and can not influence the degree of accuracy that gas temperature detects.
2, detect the probe of the air intake opening of air chamber owing to first away from the Temperature Humidity Sensor that is provided with in it, the probe of Temperature Humidity Sensor is parallel to first air-flow direction that detects in the air chamber and places, and first air intake opening and the gas outlet of detecting air chamber shifts to install, the design that this air chamber structure and probe are put makes that entering first gas flow rate that detects air chamber slows down, Temperature Humidity Sensor fully contacts the gas in the air chamber, thereby makes the detection of Temperature Humidity Sensor more accurate.
3, because the utility model grain feelings detector forecasts the foodstuff preservation situation by the detection that the air to grain heap carries out humiture and carbon dioxide content simultaneously, so, there is not hysteresis quality in the result that the utility model dopes, make that the staff can take measures to handle in time, and carry out the grain feelings by the utility model and detect and to be subjected to Effect of Environmental less, sensing range is big.
4, the utility model produces the very low Aspergillus glaucus of heat applicable to the detection that produces the very low grain storage fungi harm of heat as detecting in the growth course.
5, the hand-holdable use of the utility model is convenient for carrying, and just can finish one-time detection in 5 minutes, and detection speed is fast, and is easy and simple to handle, and the result is accurate, can satisfy the needs that China's grain depot grain feelings detect.
The utility model grain feelings detector is applicable to ventilation effect evaluation in grain storage fungi and pest damage early detection, the silo, has ensured grain depot managerial personnel's safety.
Description of drawings
Fig. 1 is the schematic appearance of the utility model grain feelings detector;
Fig. 2 is the composition frame chart of testing circuit;
Fig. 3 is the gas circuit connection diagram in the utility model;
Fig. 4 is the structural representation that first in the utility model detects air chamber;
Fig. 5 is the circuit theory diagrams of testing circuit.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
As depicted in figs. 1 and 2, the utility model grain feelings detector comprises housing 10, this housing 10 is provided with gas collecting inlet 11 and gas collecting outlet 12, be provided with testing circuit in this housing 10, this testing circuit comprises single-chip microcomputer 100, Temperature Humidity Sensor 200, carbon dioxide sensor 300 and micro air pump 400.This Temperature Humidity Sensor 200 all links to each other with single-chip microcomputer 100 with carbon dioxide sensor 300, and this single-chip microcomputer 100 links to each other with micro air pump 400 by power drive unit 500.The single-chip microcomputer 100 main tasks such as extraction collection, data processing and data access of being responsible for the pilot-gas sample, Temperature Humidity Sensor 200 is used for detecting the humiture situation of grain heap air, carbon dioxide sensor 300 is used for detecting the carbon dioxide content of grain heap air, and micro air pump 400 is used for the silo air is drawn in the air chamber, so that each sensor is measured gas.When practical application, single-chip microcomputer 100 can be selected STC series STC12C5410AD microprocessor for use, micro air pump 400 can be selected GMPA-3 type micro air pump for use, Temperature Humidity Sensor 200 can be selected the integrated Temperature Humidity Sensor of SHT7X numeral for use, the detected temperatures scope of this sensor is big, and be the important indicator that characterizes grain respiratory function power because of carbon dioxide content, measuring accuracy to carbon dioxide is had relatively high expectations, so carbon dioxide sensor 300 can be selected the infrared CO2 sensor measurement of the 6004 types module of U.S. GE company for use.
The utility model grain feelings detector mainly is that the gas in the silo is carried out sampled measurements, therefore needs the accurate gas circuit of a cover to come gas is extracted.As shown in Figure 3, also be provided with air strainer 13, first in the housing 10 and detect the air chamber 14 and the second detection air chamber 15, Temperature Humidity Sensor 200 is located at first and is detected in the air chamber 14, carbon dioxide sensor 300 is located at second and is detected in the air chamber 15, it is continuous that this air strainer 13, first detects air chamber 14, the second detection air chamber 15, micro air pump 400 passes through air flue 16, and be located between gas collecting inlet 11 and the gas collecting outlet 12.
In the gas circuit design, the installation of micro air pump can have dual mode: first kind is that micro air pump 400 is installed in gas circuit foremost, promptly be installed in air strainer 13 and first and detect between the air chamber 14, it is responsible for the gas suction is equipped with in the air chamber of sensor; Second kind is the least significant end that micro air pump 400 is installed in gas circuit, promptly second detects after the air chamber 15, and it is responsible for gas suction gas circuit, and the gas in the gas circuit is forced to discharge whole gas circuit.When practical application, consider that micro air pump 400 belongs to power component, it mainly is the impeller that leans on high speed rotating that air pump extracts gas, impeller can generate heat in rotary course, and the heat that distributes may make the gas temperature of suction rise, will certainly influence the measurement of gas temperature, therefore, in the utility model, micro air pump 400 adopts the second way to install, as shown in Figure 3, gas collecting inlet 11 links to each other through the air intake opening of air flue 16 with air strainer 13, and the gas outlet of air strainer 13 links to each other with first air intake opening that detects air chamber 14 through air flue 16, and the gas outlet of the first detection air chamber 14 links to each other through the air intake opening of air flue 16 with the second detection air chamber 15, second gas outlet of detecting air chamber 15 links to each other through the input port of air flue 16 with micro air pump 400, and the corresponding gas collecting outlet 12 of the delivery outlet of micro air pump 400 is placed.As seen, micro air pump 400 has been arranged on the least significant end of gas circuit, and sample gas is just discharged housings 10 through micro air pump 400 after by each sensor measurement, and we are called forced-ventilated gas circuit form with this gas circuit.
The purpose that air chamber is connected in the gas circuit mainly is to be used for cushioning mobile sample gas, thereby provides a stable sampled measurements environment for the sensor in the air chamber.6004 type carbon dioxide sensors 300 itself have air chamber (being the second detection air chamber 15 shown in Figure 3), and SHT7X Temperature Humidity Sensor 200 itself does not have air chamber, so in the utility model, the first detection air chamber 14 that Temperature Humidity Sensor 200 is installed in it has been carried out structural design.Consider that air-flow is bigger to the influence of temperature and humidity measurement, therefore, as shown in Figure 4, detect the probe 201 of the air intake opening 141 of air chamber 14 with first, and make the probe 201 of Temperature Humidity Sensor 200 be parallel to first air-flow directions that detect in the air chamber 14 to place away from the Temperature Humidity Sensor 200 that is provided with in it.For gas is stopped in air chamber for a long time, first air intake opening 141 that detects air chamber 14 is shifted to install with gas outlet 142, as Fig. 4, air intake opening 141 is lower, and gas outlet 142 is higher, and air intake opening 141 is not oppositely arranged with gas outlet 142.
As shown in Figure 5, in testing circuit, the IO pin P1.0/ADC0 of single-chip microcomputer U1 (being the single-chip microcomputer 100 of Fig. 2) and the output terminals A VOUT of carbon dioxide sensor 300 join, and two the IO pin P2.5 in addition of single-chip microcomputer U1 and PCA3/P2.4 join with serial clock input end SCK, the serial data input/output terminal DATA of Temperature Humidity Sensor 200 respectively.Generally, sensor has requirement to gas flow, and therefore excessive the or too small measuring accuracy that all can influence sensor of gas flow, has designed the scalable flow and micro air pump 400 has been carried out the power drive unit 500 of power drive in testing circuit.Power drive unit 500 is a PMOS transistor V1, the grid of this PMOS transistor V1 is gone up an IO pin P3.7/PCA0 corresponding with it through a resistance R 2 with single-chip microcomputer U1 and is joined, the source ground of this PMOS transistor V1, the drain electrode of this PMOS transistor V1 and the control end MOTOR of micro air pump 400 join.Single-chip microcomputer U1 passes through power controlling driver element 500 and the rotating speed of voltage-regulation air pump, thus the size of gas flow in the control gas circuit.
As depicted in figs. 1 and 2, also can be provided with LCDs 17 and button 18 on the housing 10, this LCDs 17 all links to each other with single-chip microcomputer 100 by interface circuit 600 with button 18.Single-chip microcomputer 100 can link to each other with PC 700 by RS232 interface or USB interface 701, and single-chip microcomputer 100 can link to each other with grain condition monitoring master station 800 by RS485 interface or CAN bus 801.In addition, can be battery and set battery charge control chip (as the BQ2057W chip), also Clock management chip (as DS1302) can be set in circuit, so that the time accuracy that shows on the LCDs 17 is not influenced by power down.
The course of work of the present utility model is:
Detector is placed on the position of air quality to be measured, clicks button " machine open/close ", the detector start, LCDs 17 shows main interface, and battery clicks button " test " to all components and parts power supplies, and detector begins to detect.Single-chip microcomputer 100 makes micro air pump 400 start, and the rotating speed of control micro air pump 400, the air of grain heap is drawn in the air flue 16 from gas collecting inlet 11, then pass through air strainer 13, the airborne impurity of 13 pairs of suction of air strainer carries out filtering, reduce the influence of impurity to the sensor measurement precision, the air of suction enters first successively and detects the air chamber 14 and the second detection air chamber 15 then.Detect in the air chamber 14 first, 200 pairs of gases of Temperature Humidity Sensor carry out the measurement of temperature and humidity, in measuring process, single-chip microcomputer U1 (being the single-chip microcomputer 100 of Fig. 2) is to the serial clock input end SCK of Temperature Humidity Sensor 200 input clock control signal, allow the clock synchronised of Temperature Humidity Sensor 200 and single-chip microcomputer U1, and single-chip microcomputer U1 is to the serial data input/output terminal DATA input control order of Temperature Humidity Sensor 200 and the measurement of control moisture temperature sensor 200, after Temperature Humidity Sensor 200 measurements finish, it gives single-chip microcomputer U1 by serial data input/output terminal DATA with the humiture data transmission that records, and single-chip microcomputer U1 stores and handles these humiture data.Detect in the air chamber 15 second, 300 pairs of gases of carbon dioxide sensor carry out the measurement of carbon dioxide content, carbon dioxide sensor 300 is given single-chip microcomputer U1 by output terminals A VOUT with the carbon dioxide content data transmission that records, and single-chip microcomputer U1 stores and handles these carbon dioxide content data.After the measurement of gas in two air chambers finished, the rotating speed of single-chip microcomputer U1 control micro air pump 400 made the gas in the air flue 16 discharge from gas collecting outlet 12 through micro air pump 400, thereby finishes testing process.After single-chip microcomputer U1 handled humiture data and carbon dioxide content data, single-chip microcomputer U1 on LCDs 17, checked the humiture that records and carbon dioxide content data presentation for operating personnel.
When actual measurement, operating personnel can be provided with the idle running flow and the parameters such as sampling flow, idle period of air pump by button " setting ", thereby make detector carry out sampled measurements according to parameter value is set to gas.And, when detector is in open state, operating personnel can " consult " by button at any time and up and down key all measurement result information are consulted, as detection time, detection site, grain variety etc.As staff during at far-end operation, detector also can show and processing that detector also can be reported testing result information to grain condition monitoring master station 800 by RS485 interface or CAN bus 801 with the testing result information transmission by RS232 interface or USB interface 701 to PC 700.
The utility model has the advantages that:
1, consider that air pump belongs to power component, in the process of impeller High Rotation Speed suction sample gas, Air pump meeting distribute heat, the heat that distributes can exert an influence to the temperature of sample gas, so this practicality is new The rearmounted mode of pump is adopted in the gas circuit design of type grain feelings detector, is about to the least significant end that micro air pump is arranged on gas circuit (refer to be arranged on air cleaner, first and detect the back that air chamber, second detects air chamber), adopt forced-ventilated side Formula is sampled to sample gas, and this gas circuit design not only can reach the purpose of draws sample gas, and And can not affect the accuracy that gas temperature detects.
2, detect the air inlet of air chamber away from the probe of the Temperature Humidity Sensor that arranges in it, temperature owing to first The probe of humidity sensor is parallel to first air-flow direction that detects in the air chamber to be placed, and first detects gas Air inlet and the gas outlet of chamber shift to install, and the design that this air chamber structure and probe are put is so that enter first The gas flow rate that detects air chamber slows down, and Temperature Humidity Sensor fully contacts the gas in the air chamber, thereby makes warm and humid The detection of degree sensor is more accurate.
3, because the utility model grain feelings detector carries out humiture and dioxy by the air to the grain heap simultaneously Change the detection of carbon content and forecast the foodstuff preservation situation, so the result that the utility model dopes does not exist Hysteresis quality so that the staff can take measures to process in time, and is carried out the grain feelings by the utility model Detection is subjected to the impact of environmental factor littler, and detection range is big.
4, the utility model is applicable to the detection that produces the very low grain storage fungi harm of heat, as detects life Produce the very low Aspergillus glaucus of heat in the growth process.
5, the hand-holdable use of the utility model is convenient for carrying, and just can finish one-time detection in 5 minutes, Detection speed is fast, and is easy and simple to handle, and the result is accurate, can satisfy the needs that China's grain conditions in grain depot detects.
The utility model grain feelings detector is applicable in grain storage fungi and pest damage earlier detection, the silo and ventilates Effect assessment has ensured grain depot management personnel's safety.
Claims (8)
1. grain feelings detector, it is characterized in that: it comprises housing, this housing is provided with gas collecting inlet and gas collecting outlet, be provided with testing circuit in this housing, this testing circuit comprises single-chip microcomputer, Temperature Humidity Sensor, carbon dioxide sensor and micro air pump, wherein: this Temperature Humidity Sensor all links to each other with single-chip microcomputer with carbon dioxide sensor, and this single-chip microcomputer links to each other with micro air pump by power drive unit.
2. grain feelings detector according to claim 1, it is characterized in that: also be provided with air strainer, first in the described housing and detect the air chamber and the second detection air chamber, described Temperature Humidity Sensor is located at first and is detected in the air chamber, described carbon dioxide sensor is located at second and is detected in the air chamber, this air strainer, the first detection air chamber, second detect air chamber, described micro air pump links to each other by air flue, and are located between described gas collecting inlet and the outlet of described gas collecting.
3. grain feelings detector according to claim 2, it is characterized in that: described gas collecting inlet links to each other with the air intake opening of described air strainer through air flue, the gas outlet of described air strainer links to each other with described first air intake opening that detects air chamber through air flue, described first gas outlet of detecting air chamber links to each other with described second air intake opening that detects air chamber through air flue, described second gas outlet of detecting air chamber links to each other with the input port of described micro air pump through air flue, and the corresponding described gas collecting outlet of the delivery outlet of described micro air pump is placed.
4. grain feelings detector according to claim 3, it is characterized in that: described first detects the probe of the air intake opening of air chamber away from the described Temperature Humidity Sensor that is provided with in it, and the probe of described Temperature Humidity Sensor is parallel to described first air-flow direction that detects in the air chamber and places.
5. grain feelings detector according to claim 4 is characterized in that: described first air intake opening and the gas outlet of detecting air chamber shifts to install.
6. according to each the described grain feelings detector in the claim 1 to 5, it is characterized in that: in the described testing circuit: an IO pin of described single-chip microcomputer and the output terminal of described carbon dioxide sensor join, and in addition two IO pins of described single-chip microcomputer join with serial clock input end, the serial data input/output terminal of described Temperature Humidity Sensor respectively; Described power drive unit is a PMOS transistor, and the transistorized grid of this PMOS IO pin corresponding with it on resistance and described single-chip microcomputer joins, and the control end of this PMOS transistor drain and described micro air pump joins.
7. grain feelings detector according to claim 1 is characterized in that: also be provided with LCDs and button on the described housing, this LCDs all links to each other with described single-chip microcomputer by interface circuit with button.
8. grain feelings detector according to claim 1 is characterized in that: described single-chip microcomputer links to each other with PC by RS232 interface or USB interface, and described single-chip microcomputer links to each other with grain condition monitoring master station by RS485 interface or CAN bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200800473U CN201193949Y (en) | 2008-04-18 | 2008-04-18 | Grain situation detecting instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200800473U CN201193949Y (en) | 2008-04-18 | 2008-04-18 | Grain situation detecting instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201193949Y true CN201193949Y (en) | 2009-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200800473U Expired - Lifetime CN201193949Y (en) | 2008-04-18 | 2008-04-18 | Grain situation detecting instrument |
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| Country | Link |
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| CN (1) | CN201193949Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824437A (en) * | 2014-02-27 | 2014-05-28 | 武汉理工大学 | Hand-held terminal used for data acquisition and transmission of condition of stored grain |
| CN109085309A (en) * | 2018-11-01 | 2018-12-25 | 福建省博凯科技有限公司 | A kind of gas detecting instrument |
-
2008
- 2008-04-18 CN CNU2008200800473U patent/CN201193949Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824437A (en) * | 2014-02-27 | 2014-05-28 | 武汉理工大学 | Hand-held terminal used for data acquisition and transmission of condition of stored grain |
| CN109085309A (en) * | 2018-11-01 | 2018-12-25 | 福建省博凯科技有限公司 | A kind of gas detecting instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080418 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |