CN113503939A - Non-contact type box material level real-time monitoring system - Google Patents
Non-contact type box material level real-time monitoring system Download PDFInfo
- Publication number
- CN113503939A CN113503939A CN202110965305.6A CN202110965305A CN113503939A CN 113503939 A CN113503939 A CN 113503939A CN 202110965305 A CN202110965305 A CN 202110965305A CN 113503939 A CN113503939 A CN 113503939A
- Authority
- CN
- China
- Prior art keywords
- module
- capacitance
- voltage
- material level
- monitoring system
- 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.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention provides a non-contact box material level real-time monitoring system which mainly comprises a capacitive sensor, a capacitance acquisition module, a single chip microcomputer module, a power supply module and an alarm module, wherein the capacitive sensor is connected with the capacitance acquisition module, the capacitance acquisition module is respectively connected with a single chip microcomputer control module and a voltage conversion module, the single chip microcomputer control module is respectively connected with an upper computer and the power supply module, and the upper computer is provided with a touch screen which can realize human-computer interaction through a virtual instrument. The monitoring system can realize non-contact real-time monitoring of the seed box material level of the seeder, breaks the problem that a traditional monitoring system is easily influenced by the environment, and improves the reliability of the detection system.
Description
Technical Field
The invention relates to a non-contact type real-time monitoring system for seed box material level, in particular to a multi-channel capacitance type real-time monitoring system for seed box material level.
Background
Agricultural seeding is an important ring in agricultural production, and traditional agricultural seeding often can lead to seeding faults such as reseeding, missed seeding and seeder seed case evacuation, and wherein the tradition is mainly through operating personnel's experience judgement to seed metering ware seed case evacuation to park the reseeding. The method is too complex and labor-consuming, and reduces the sowing efficiency, so that a monitoring system capable of monitoring the seed box material level in real time is needed in agricultural sowing. At present, the monitoring system that china's case material level monitoring system mainly used photoelectric sensor as the owner, this system will install in case both sides, and the equidistance is installed downwards, descend the take the altitude when case material level, the photoelectric sensor of relevant position then receives the light beam that photoelectric element sent in a certain time this moment, consequently alright with the condition in order to confirm case material level, but this monitoring system easily receives the influence of ambient light and dust, need keep photoelectric sensor's cleanness, and this monitoring system easily receives the influence that case seed uplift, thereby the detection precision of this monitoring system has been reduced, consequently, need one set of stable performance and be difficult for receiving the monitoring system of case seed distribution state to case evacuation urgently.
Disclosure of Invention
The invention mainly aims at the defects existing in the research background, aims to improve the monitoring precision and the system reliability of a seed box material level monitoring system, realizes the real-time monitoring of the material level of a seed box during the seeding of a seeder, and timely sends an alarm to an operator when the seed box is nearly emptied to prompt the operator to stop and replenish seeds, thereby avoiding the occurrence of large-area missed seeding caused by the emptying of the seed box of a seeding apparatus. The invention mainly designs a non-contact type real-time monitoring system for a box material level based on a capacitive sensor.
The invention relates to a non-contact type box material level real-time monitoring system which mainly comprises a capacitive sensor, a capacitance acquisition module, a singlechip module, a power supply module and an alarm module and is characterized in that a polar plate structure of the capacitive sensor is a parallel opposed polar plate structure, and two ends of a capacitive polar plate are respectively modulated with an excitation port EXCA and a sigma-delta of the capacitance acquisition moduleThe input end of the device is connected with the capacitance acquisition module through a coaxial interface and a shielding wire, the shielding end of the shielding wire and the coaxial interface is connected with the grounding end of the PCB, and the automatic compensation of the external parasitic capacitance is realized by means of the parasitic capacitance compensation function of the Pcap02 chip, so that the influence of the external parasitic capacitance on the capacitance measurement precision is avoided. The capacitance acquisition module is respectively connected with the singlechip control module and the voltage conversion module, wherein a capacitance digital conversion chip Pcap02 in the capacitance acquisition module is connected with the singlechip control module and the voltage conversion module through I2The C bus is connected with the single chip microcomputer control module to realize programming and data output. The single chip microcomputer control module is respectively connected with the upper computer through a power module, the power module mainly comprises a vehicle-mounted +/-12V voltage-stabilized power supply and a voltage conversion module consisting of LM7805 and LM1117 chips, wherein the LM7805 voltage conversion circuit can convert the vehicle-mounted +/-12V voltage-stabilized power supply and stably output 5V voltage, and the LM1117 voltage conversion circuit can convert and stably output the 5V voltage to 3.3V voltage so as to ensure the normal work of the single chip microcomputer module and the capacitor acquisition module. The voltage conversion module formed by the LM7805 and the LM1117 chips is suitable for the field working temperature of the seed metering device, and can ensure the normal work of a real-time seed metering monitoring system of the seed metering device. The upper computer is provided with a touch screen as a human-computer interaction terminal, and the material level condition of the seed box is obtained in real time through an interface of the virtual instrument.
The capacitive sensor consists of parallel opposite polar plates and is used for generating a stable electric field to form a detection area of the capacitive sensor. The capacitance sensor is arranged on two sides of the seed box, and in order to meet the working requirements of the capacitance sensor, the position parameters and the size parameters of the capacitance sensor are extremely important, wherein the position parameters and the size parameters mainly comprise the distance d between polar plates, the length L of the polar plates, the thickness B of the polar plates and the width W of the polar plates. As shown in fig. 5. Two ends of a polar plate of the capacitance sensor are respectively connected with an excitation port EXCA of the capacitance acquisition module and an input end of the sigma-delta modulator, the capacitance sensor is connected with the capacitance acquisition module through a coaxial interface and a shielding lead, the shielding lead and the shielding end of the coaxial interface are connected with a grounding end of a PCB, and the automatic compensation of an external parasitic capacitance is realized by means of the parasitic capacitance compensation function of a Pcap02 chip, so that the influence of the external parasitic capacitance on the capacitance measurement precision is avoided. The detection principle of the parallel opposed polar plate capacitive sensor is as follows: as shown in fig. 2, in the sowing process, the material level of the seed box continuously decreases along with the sowing progress, the ratio of seeds to air in the detection space of the capacitance sensor also changes, and the capacitance value of the capacitance sensor also changes due to the change of the equivalent dielectric constant of the detection area of the capacitance sensor, and the specific change process is as follows:
wherein C is the capacitance of the capacitive sensor, F;
is the equivalent dielectric constant of the capacitive sensor, F/m; s is the area of the electrode plate, m2(ii) a d is the plate spacing, m.
When the seed level in the seed box is changed, the volume V occupied by the seeds and the air between the polar plates1、V2When the capacitance value of the capacitance sensor changes, the equivalent dielectric constant between the electrode plates changes, and then the capacitance value of the capacitance sensor changes:
wherein, V, V1And V2Respectively the total volume of the detection field between the capacitor plates, the seed volume and the volume occupied by air,
、
the dielectric constants of air and seed, respectively, the capacitance of the capacitive sensor at this time is:
then when the seed box is seedless, the capacitance of the plate can be expressed as:
when the seed level in the seed box drops, the capacitance of the plate can be expressed as:
a single chip microcomputer control module mainly
The capacitance acquisition module mainly comprises a circuit formed by a capacitance measurement chip Pcap02 of the German acam company, the conversion time range of the chip can reach 2us of high-precision time conversion at the minimum, the measurement range is from several picofarads to several hundred nanofarads, and the measurement precision can reach 15aF at the highest. The chip can compensate the internal parasitic capacitance through single grounding and differential connection, and on the other hand, temperature compensation can be realized through an internal integrated temperature sensor and an external sensor. The chip has simple external circuit and can overcome the parasitic capacitance in the system. The capacitance acquisition module is mainly used for acquiring the capacitance value of the polar plate in real time and storing the measurement result in a corresponding result register. The disseminator is at the seeding in-process, and the material level of seed case can constantly descend, and the equivalent dielectric constant that detects the space between the polar plate simultaneously also can change thereupon, and consequently the capacitance value of electric capacity polar plate can change, and the polar plate capacitance is different when owing to different material levels, so through the capacitance that detects the polar plate, just can confirm the condition of seed case material level.
Compared with a photoelectric seed box material level monitoring system, the non-contact seed box material level real-time monitoring system designed by the invention has more stable performance. The monitoring area of the capacitance sensor of the parallel opposed type pole plates in the non-contact type seed box material level real-time monitoring system is a rectangular space between the parallel pole plates, when a seeder performs seeding operation, the material level in the seed box can continuously drop, at the moment, seeds and air jointly serve as media between the pole plates, and the equivalent dielectric constant between the pole plates is also continuously changed due to the fact that the volume ratio of the air to the seeds is continuously changed, so that the capacitance value of a detection space is changed, and the material level condition in the seed box can be further judged according to the capacitance value detected by the capacitance acquisition module.
The detection principle of the parallel opposed polar plate capacitive sensor is as follows: as shown in fig. 2, in the sowing process, the material level of the seed box continuously decreases along with the sowing progress, the ratio of seeds to air in the detection space of the capacitance sensor also changes, and the capacitance value of the capacitance sensor also changes due to the change of the equivalent dielectric constant of the detection area of the capacitance sensor, and the specific change process is as follows:
wherein C is the capacitance of the capacitive sensor, F;
is the equivalent dielectric constant of the capacitive sensor, F/m; s is the area of the electrode plate, m2(ii) a d is the plate spacing, m.
When the seed level in the seed box is changed, the volume V occupied by the seeds and the air between the polar plates1、V2When the capacitance value of the capacitance sensor changes, the equivalent dielectric constant between the electrode plates changes, and then the capacitance value of the capacitance sensor changes:
wherein, V, V1And V2Respectively the total volume of the detection field between the capacitor plates, the seed volume and the volume occupied by air,
、
the dielectric constants of air and seed, respectively, the capacitance of the capacitive sensor at this time is:
then when the seed box is seedless, the capacitance of the plate can be expressed as:
when the seed level in the seed box drops, the capacitance of the plate can be expressed as:
the single chip microcomputer control module mainly comprises a single chip microcomputer circuit consisting of STM32 series control chips, and the circuit mainly comprises a single chip microcomputer crystal oscillator circuit, a single chip microcomputer reset circuit, a JTAG interface circuit, a power supply interface circuit and a buzzer alarm circuit. The module is mainly formed by2The C bus reads the measuring result, programs the capacitance acquisition module, processes data and uploads the data to the upper computer through the serial port communication module.
The power module mainly comprises a vehicle-mounted +/-12V voltage-stabilized power supply and a voltage conversion module consisting of an LM7805 chip and an LM1117 chip, wherein the LM7805 chip fixes the output voltage to be 5V, an overcurrent and overload circuit is integrated inside the module, the normal working temperature range of the module is-40-125 ℃, the normal working temperature range of the module is 1% when the LM1117 chip fixes the output voltage to be 3.3V, and the module is suitable for field application operation of the seeder. The LM7805 voltage conversion circuit can convert a vehicle-mounted +/-12V voltage-stabilized power supply and stably output 5V voltage. The LM1117 voltage conversion circuit can stably output 5V voltage into 3.3V voltage so as to ensure the normal work of the single chip module and the capacitance acquisition module.
The power module is mainly powered by a vehicle-mounted +/-12V voltage-stabilizing power supply, the +/-12V voltage is subjected to voltage reduction and voltage stabilization through the LM7805 chip, 5V voltage is stably output, then the voltage module is connected with a voltage conversion module consisting of the LM1117 chip, the voltage is stably output by the LM1117 chip for 3.3V, and the power module supplies power to the single chip microcomputer module and the capacitor acquisition module respectively.
And the USB serial port communication module belongs to a USB-to-TTL 232 module, and is used for completing serial port communication between the singlechip and the PC. The module has the main function of realizing the communication between the singlechip and the PC.
A non-contact type box material level real-time monitoring system comprises:
the capacitance value of a capacitance sensor, namely a parallel opposed capacitance polar plate, is detected in real time;
the single chip microcomputer controls the capacitance acquisition chip to complete data acquisition of the capacitance sensor, and capacitance signals are converted into digital signals through the inside of the system;
capacitance acquisition module pass I2The bus C transmits the acquired data to the single chip microcomputer, and the single chip microcomputer control module processes and analyzes the acquired data;
the single chip microcomputer determines the condition of the material level in the seed box according to the variation of the capacitance value of the polar plate acquired by the capacitance acquisition module, and transmits acquired capacitance data to an upper computer through the USB communication module;
and the single chip microcomputer controls the buzzer alarm circuit in time to give an alarm prompt to an operator if the situation that the material level of the seed box is close to emptying is judged according to the data processing result.
The program design of the upper computer virtual instrument software is the key point of a real-time monitoring system of the seed box of the seeder, and mainly comprises the functions of data communication, operation processing, seed box material level display, seed box emptying fault alarm prompt and the like.
According to the non-contact type box material level real-time monitoring system, the single chip microcomputer controls the capacitance acquisition module to complete data acquisition of the capacitance sensor, and the single chip microcomputer processes the acquired capacitance variation, so that the box material level can be further acquired, and the single chip microcomputer can control the buzzer alarm circuit to give an alarm prompt to an operator. The single chip microcomputer uploads a processed data result to the upper computer through the USB communication module, the upper computer processes and analyzes received capacitance value data through virtual instrument software Labview to obtain the condition of seed box material level, and an alarm prompt is sent to an operator for emptying the seed box of the seed sowing device, so that large-area miss sowing caused by emptying the seed box is avoided.
Drawings
FIG. 1 is a general block diagram of a non-contact type tank level real-time monitoring system according to an embodiment.
FIG. 2 is a schematic diagram showing the change of the material level of the seed box during sowing in the first embodiment.
Fig. 3 is a schematic diagram of an operating principle of the capacitive sensor according to the first embodiment.
Fig. 4 is a schematic structural dimension diagram of a capacitive sensor according to an embodiment.
Fig. 5 is a schematic deployment diagram and a schematic operating state diagram of the capacitive sensor according to the first embodiment.
Fig. 6 is a schematic connection diagram of the capacitive sensor and the capacitance acquisition module according to the first embodiment.
Detailed Description
The invention is further illustrated by the following figures and examples in which:
example one
It can be seen from fig. 1 that the non-contact type real-time monitoring system for the material level in the tank of the present embodiment mainly comprises a capacitive sensor, a capacitance acquisition module, a single-chip microcomputer control module, a power module, a USB communication module and an upper computer, and is characterized in that two ends of a polar plate of the capacitive sensor are respectively connected with an excitation port EXCA of the capacitance acquisition module and an input end of a sigma-delta modulator, and are connected with the capacitance acquisition module through a coaxial interface and a shielding wire, the shielding end of the shielding wire and the coaxial interface is connected with a PCB grounding end, and the parasitic capacitance compensation function of a Pcap02 chip is used for realizing the automatic compensation of an external parasitic capacitance, so as to avoid the influence of the external parasitic capacitance on the capacitance measurement precision. The capacitance acquisition module is respectively connected with the singlechip control module and the voltage conversion module, wherein a capacitance digital conversion chip in the capacitance acquisition module passes through I2The C bus is connected with the single chip microcomputer control module to realize programming and data output. The capacitance acquisition module is respectively connected with the singlechip control module and the voltage conversion module, wherein a capacitance digital conversion chip Pcap02 in the capacitance acquisition module passes throughI2The C bus is connected with the single chip microcomputer control module to realize programming and data output. The single chip microcomputer control module is respectively connected with the power module and the upper computer, the power module mainly comprises a vehicle-mounted +/-12V voltage-stabilized power supply and a voltage conversion module consisting of LM7805 and LM117 chips, wherein the LM7805 voltage conversion circuit can convert the vehicle-mounted +/-12V voltage-stabilized power supply and stably output 5V voltage, and the LM1117 voltage conversion circuit can convert and stably output the 5V voltage into 3.3V voltage so as to ensure the normal work of the single chip microcomputer module and the capacitor acquisition module. The voltage conversion module formed by the LM7805 and the LM1117 chips is suitable for the field working temperature of the seed metering device, and can ensure the normal work of a real-time seed metering monitoring system of the seed metering device. The upper computer is provided with a touch screen as a human-computer interaction terminal, and the material level condition of the seed box is obtained in real time through an interface of the virtual instrument.
As can be seen from the attached figure 2, when the seeder keeps a certain speed to move forward in the seeding process, the material level descending distance of the seed box is approximately equal in the same time, and the real-time monitoring of the seed box material level can be realized by establishing the relation of the seed box material level and the polar plate implementation capacitance.
The detection principle of the parallel opposed polar plate capacitive sensor is as follows: as shown in fig. 2, in the sowing process, the material level of the seed box continuously decreases along with the sowing progress, the ratio of seeds to air in the detection space of the capacitance sensor also changes, and the capacitance value of the capacitance sensor also changes due to the change of the equivalent dielectric constant of the detection area of the capacitance sensor, and the specific change process is as follows:
wherein C is the capacitance of the capacitive sensor, F;
is the equivalent dielectric constant of the capacitive sensor, F/m; s is the area of the electrode plate, m2(ii) a d is the plate spacing, m.
When the seed level in the seed box is changed, the seeds between the polar platesAnd volume V occupied by air1、V2When the capacitance value of the capacitance sensor changes, the equivalent dielectric constant between the electrode plates changes, and then the capacitance value of the capacitance sensor changes:
wherein, V, V1And V2Respectively the total volume of the detection field between the capacitor plates, the seed volume and the volume occupied by air,
、
the dielectric constants of air and seed, respectively, the capacitance of the capacitive sensor at this time is:
then when the seed box is seedless, the capacitance of the plate can be expressed as:
when the seed level in the seed box drops, the capacitance of the plate can be expressed as:
the main parameters of the capacitive sensor are: the side length, namely the length and the width of the electrodes, the distance between electrode plates, the thickness of an electrode sheet, the thickness of a substrate of the electrode sheet and the relative dielectric constant of a material of the electrode plate.
Fig. 3 shows a schematic diagram of a capacitive sensor in the first embodiment, and fig. 3 shows that the capacitive sensor of the invention uses a parallel-opposed plate capacitive sensor, in which the major dimensions include a plate length L, a plate width W and a plate distance d.
It can be seen from fig. 5 that the parallel opposed plate capacitance sensors are installed on both sides of the seed box, when the seed level in the seed box is lowered, the ratio of the seeds and the air occupied in the plate detection space is changed, and the equivalent dielectric constant of the detection area between the plates is changed, so that the capacitance value of the capacitance plates is changed, and the condition of the seed box level can be determined by detecting the capacitance of the plates due to the different capacitance values of the plates corresponding to different levels.
In the embodiment, the working connection diagram of the capacitive acquisition module and the capacitive sensor is shown in fig. 2, it can be seen that in the sowing process of the sowing machine, along with the progress of the sowing process, the material level of seeds in the seed box also drops, the volume ratio of the seeds and air in the polar plate detection space also changes, and due to the difference of the dielectric constants of the air and the seeds, the equivalent dielectric constant of the polar plate detection space also changes, so that the capacitance value of the polar plate also changes correspondingly. As can be seen from fig. 6, two ends of the electrode plate of the capacitive sensor are respectively connected to the input ends of the excitation port EXCA and the sigma-delta modulator of the capacitance acquisition module, and are connected to the capacitance acquisition module through the coaxial interface and the shielding wire, the shielding ends of the shielding wire and the coaxial interface are connected to the PCB ground end, and the parasitic capacitance compensation function of the Pcap02 chip is used to realize the automatic compensation of the external parasitic capacitance, so as to avoid the influence of the external parasitic capacitance on the capacitance measurement accuracy.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, it should be understood that any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. The non-contact type box material level real-time monitoring system mainly comprises a capacitance sensor, a capacitance acquisition module, a single chip microcomputer control module, a power supply module and a USBThe device comprises a communication module and an upper computer, and is characterized in that two ends of a polar plate of a capacitive sensor are respectively connected with the input ends of an excitation port EXCA and a sigma-delta modulator of a capacitance acquisition module through a coaxial interface and a shielding lead, the shielding ends of the shielding lead and the coaxial interface are connected with the grounding end of a PCB, and the automatic compensation of external parasitic capacitance is realized by means of the parasitic capacitance compensation function of a PCap02 chip, so that the influence of the external parasitic capacitance on the capacitance measurement precision is avoided; the capacitance acquisition module is respectively connected with the singlechip control module and the voltage conversion module, wherein a capacitance digital conversion chip in the capacitance acquisition module passes through I2The bus C is connected with the single chip microcomputer control module to realize programming and data output; the single chip microcomputer control module is respectively connected with the upper computer and the power supply module, the power supply module mainly comprises a vehicle-mounted +/-12V stabilized power supply and a voltage conversion module, and the voltage conversion module converts the vehicle-mounted +/-12V stabilized power supply and stably outputs 5V and 3.3V voltages to ensure the normal work of the capacitance acquisition module, the single chip microcomputer module and other electrical components; the upper computer is provided with a touch screen as a human-computer interaction terminal, a human-computer interaction interface is designed through virtual instrument software Labview, and an operator acquires the condition of the seed box material level in real time through the interface.
2. The system for real-time monitoring of non-contact tank material level as claimed in claim 1, wherein the capacitive sensor is composed of parallel and opposite plates, as shown in fig. 4, the major dimensions of the structure include plate width W, plate length L and plate distance d; as shown in fig. 5, the opposed parallel plates are mounted on both sides of the seed box.
3. The system for real-time monitoring of tank level in non-contact manner as claimed in claim 1, wherein the surface of the electrode plate of the capacitive sensor is coated with an insulating protective layer made of ultra-high molecular weight polyethylene (UHMWPE) film.
4. The non-contact type seed box material level real-time monitoring system as claimed in claim 1, wherein the voltage module mainly comprises a vehicle-mounted +/-12V voltage-stabilized power supply and a voltage conversion module, the voltage conversion module mainly comprises a voltage conversion circuit consisting of an LM7805 chip and an LM1117 chip, the LM7805 chip fixes the output voltage to be 5V, an overcurrent and overload circuit is integrated inside, the normal working temperature range of the overcurrent and overload circuit is-40 ℃ to 125 ℃, the precision of the overcurrent and overload circuit is 1% when the LM1117 chip fixes the output voltage to be 3.3V, and the normal working temperature range of the overcurrent and overload circuit is-40 ℃ to 125 ℃, so that the non-contact type seed box material level real-time monitoring system is suitable for field application operation of a seeder; the LM7805 voltage conversion circuit can convert a vehicle-mounted +/-12V voltage-stabilized power supply and stably output 5V voltage; the LM1117 voltage conversion circuit can convert and stably output 5V voltage into 3.3V voltage so as to ensure the normal work of the single chip module and the capacitance acquisition module; the voltage conversion module formed by the LM7805 and the LM1117 chips is suitable for the field working temperature of the seed metering device, and can ensure the normal work of a real-time seed metering monitoring system of the seed metering device.
5. The non-contact real-time monitoring system for the seed box material level as claimed in claim 1, wherein the upper computer is provided with a tablet computer with a touch function, and human-computer interaction can be realized through virtual instrument software Labview, and the monitoring system is provided with a human-computer interaction operation interface through Labview, so that an operator can know the condition of the seed box material level in real time, and timely reseeding is performed to avoid seed box emptying and missed seeding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110965305.6A CN113503939A (en) | 2021-08-23 | 2021-08-23 | Non-contact type box material level real-time monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110965305.6A CN113503939A (en) | 2021-08-23 | 2021-08-23 | Non-contact type box material level real-time monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113503939A true CN113503939A (en) | 2021-10-15 |
Family
ID=78015930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110965305.6A Pending CN113503939A (en) | 2021-08-23 | 2021-08-23 | Non-contact type box material level real-time monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113503939A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414009A (en) * | 2021-12-31 | 2022-04-29 | 三一汽车制造有限公司 | Method and device for calibrating material level measuring system, material level measuring system and mixing plant |
| CN115777299A (en) * | 2022-12-23 | 2023-03-14 | 扬州大学 | Connecting device capable of adapting to monitoring of discharge capacity of various seeds |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120224333A1 (en) * | 2011-03-04 | 2012-09-06 | Abawi Daniel Z | Multi-plate board embedded capacitor and methods for fabricating the same |
| CN202514276U (en) * | 2012-01-17 | 2012-11-07 | 石河子大学 | Air suction type bidirectional movable plug seedling seeder |
| CN103940858A (en) * | 2014-03-28 | 2014-07-23 | 华南农业大学 | Capacitance type online detection method and device for water of cereals |
| CN105973343A (en) * | 2016-06-23 | 2016-09-28 | 浙江大学 | Method for detecting dynamic material level in fluidized bed |
| CN205981364U (en) * | 2016-08-25 | 2017-02-22 | 浙江纪超自动化技术有限公司 | Capacitive gauge |
| CN108709604A (en) * | 2018-05-28 | 2018-10-26 | 浙江维思无线网络技术有限公司 | A kind of material level detection method and device |
| CN108871498A (en) * | 2018-08-24 | 2018-11-23 | 苏州大学 | Condenser type adaptive universal liquid level emasuring device and method |
| CN208765802U (en) * | 2018-09-20 | 2019-04-19 | 中国人民解放军空军勤务学院 | Filter separator catch basin oil water interface sensor and system |
| CN111595413A (en) * | 2020-06-23 | 2020-08-28 | 桂林电子科技大学信息科技学院 | Non-contact type container liquid level measuring device and method |
| CN211927007U (en) * | 2020-04-26 | 2020-11-13 | 厦门微控科技有限公司 | High-temperature material level sensor |
-
2021
- 2021-08-23 CN CN202110965305.6A patent/CN113503939A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120224333A1 (en) * | 2011-03-04 | 2012-09-06 | Abawi Daniel Z | Multi-plate board embedded capacitor and methods for fabricating the same |
| CN202514276U (en) * | 2012-01-17 | 2012-11-07 | 石河子大学 | Air suction type bidirectional movable plug seedling seeder |
| CN103940858A (en) * | 2014-03-28 | 2014-07-23 | 华南农业大学 | Capacitance type online detection method and device for water of cereals |
| CN105973343A (en) * | 2016-06-23 | 2016-09-28 | 浙江大学 | Method for detecting dynamic material level in fluidized bed |
| CN205981364U (en) * | 2016-08-25 | 2017-02-22 | 浙江纪超自动化技术有限公司 | Capacitive gauge |
| CN108709604A (en) * | 2018-05-28 | 2018-10-26 | 浙江维思无线网络技术有限公司 | A kind of material level detection method and device |
| CN108871498A (en) * | 2018-08-24 | 2018-11-23 | 苏州大学 | Condenser type adaptive universal liquid level emasuring device and method |
| CN208765802U (en) * | 2018-09-20 | 2019-04-19 | 中国人民解放军空军勤务学院 | Filter separator catch basin oil water interface sensor and system |
| CN211927007U (en) * | 2020-04-26 | 2020-11-13 | 厦门微控科技有限公司 | High-temperature material level sensor |
| CN111595413A (en) * | 2020-06-23 | 2020-08-28 | 桂林电子科技大学信息科技学院 | Non-contact type container liquid level measuring device and method |
Non-Patent Citations (2)
| Title |
|---|
| 田雅楠: "基于单片机的肥箱料位传感器设计与试验", 《农机化研究》 * |
| 黄齐超 等: "基于CPLD的料位检测***的设计", 《自动化与仪表》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414009A (en) * | 2021-12-31 | 2022-04-29 | 三一汽车制造有限公司 | Method and device for calibrating material level measuring system, material level measuring system and mixing plant |
| CN115777299A (en) * | 2022-12-23 | 2023-03-14 | 扬州大学 | Connecting device capable of adapting to monitoring of discharge capacity of various seeds |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113503939A (en) | Non-contact type box material level real-time monitoring system | |
| CN1157592C (en) | Sensor for detecting predesigned filling interface of container | |
| WO2019140920A1 (en) | Online detection system and method for droplet deposition amount of spraying operation of plant protection mechanism | |
| CN101907594B (en) | Wellhead crude oil water content on-line measuring device | |
| CN103245824A (en) | Non-contact D-dot voltage transformer and voltage detection self-correcting method thereof | |
| CN106932675A (en) | For the monitoring device of arrester | |
| US6917209B2 (en) | Non- contacting capacitive diagnostic device | |
| CN207352075U (en) | Broadband electric field measuring device | |
| CN209014657U (en) | A kind of precision capacitance measuring device | |
| CN206804755U (en) | Monitoring device for arrester | |
| CN107024613A (en) | High-voltage feedback power cable square wave on-line overvoltage monitor | |
| CN207675302U (en) | The light radiation monitoring device of High-Power Microwave cavity | |
| CN102288828A (en) | Digital high-voltage multifunctional insulator detection device | |
| CN206281891U (en) | A kind of temperature compensating type electronic type capacitance partial pressure transformer | |
| CN106645969B (en) | Portable semiconductor non-contact resistivity tester and use method thereof | |
| CN208613095U (en) | A kind of device classified according to capacitance error to capacitor | |
| CN111649799A (en) | Oil level monitoring circuit and oil level monitoring device | |
| CN205665366U (en) | High tension transmission line insulator on -line monitoring system based on GPRS remote communications | |
| CN1023835C (en) | Level-sensing device | |
| CN108535150A (en) | Based on capacitive droplet shape detecting apparatus | |
| CN106771423A (en) | A kind of temperature compensation and device of electronic type capacitance partial pressure transformer | |
| CN109283398A (en) | A kind of weak capacitive precision measurement apparatus based on Drive cable technique | |
| US10088357B2 (en) | Photovoltaic sensor arrays | |
| Zhao et al. | Design of High-Precision Infrared Photoelectric Sensor and Its Adoption in Soft Package Counting Management in Workshop | |
| CN209072093U (en) | The T-BOX battery of adaptive inductive charging can be carried out according to temperature and cell voltage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20211015 |