CN213147993U - Continuous material level monitoring sensor - Google Patents
Continuous material level monitoring sensor Download PDFInfo
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- CN213147993U CN213147993U CN202022345654.1U CN202022345654U CN213147993U CN 213147993 U CN213147993 U CN 213147993U CN 202022345654 U CN202022345654 U CN 202022345654U CN 213147993 U CN213147993 U CN 213147993U
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Abstract
The utility model discloses a continuity material level monitoring sensor, include: casing, measuring probe and circuit part, the circuit part sets up in the casing, and the circuit part includes: a power supply circuit for supplying power; the MCU control circuit is used for processing data; the display circuit is electrically connected with the MCU control circuit and is used for material level display; the capacitance measuring circuit is respectively and electrically connected with the MCU control circuit and the measuring probe and is used for detecting external capacitance change; the output control circuit is electrically connected with the MCU control circuit and is used for controlling the output quantity; and the working parameter setting circuit is electrically connected with the MCU control circuit and is used for setting working parameters. The utility model discloses a working parameter sets up the circuit and realizes setting up sensor parameter, realizes intelligent learning function, and learning function makes its automatic learning and shielding background interference, and level sensor's detection function changes accuracy and convenient realization, has avoided error and inconvenient that manual adjustment brought.
Description
Technical Field
The utility model belongs to material level detection area, concretely relates to continuity material level monitoring sensor.
Background
In the technical field of material level instruments, a continuous material level monitoring sensor is mainly applied to material level control or upper and lower limit alarm. The continuous material level monitoring sensor utilizes the capacitance measuring principle, the detecting end of the sensor and a container are used as two polar plates of a capacitor, the height change of the material level of a measured medium is converted into the change of capacitance, and the distance between the material level and the bottom of a probe is calculated by detecting the capacitance. The data processed and returned by the singlechip controls peripheral circuits such as output and the like, and the peripheral circuits are transmitted to the driving circuit to send out a switching signal so as to achieve the purpose of monitoring.
The traditional continuous material level monitoring sensor mostly adopts a non-integrated analog high-speed switch circuit as the signal processing, and a single chip microcomputer can be interfered by the environment and the electromagnetic interference from products when processing data, so that the problem of false alarm can be caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a continuity material level monitoring sensor.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the continuous level monitoring sensor includes: casing, measuring probe and circuit part, the circuit part sets up in the casing, and the circuit part includes:
a power supply circuit for supplying power;
the MCU control circuit is used for processing data;
the display circuit is electrically connected with the MCU control circuit and is used for material level display;
the capacitance measuring circuit is respectively and electrically connected with the MCU control circuit and the measuring probe and is used for detecting external capacitance change;
the output control circuit is electrically connected with the MCU control circuit and is used for controlling the output quantity;
and the working parameter setting circuit is electrically connected with the MCU control circuit and is used for setting working parameters.
The utility model discloses a continuity material level monitoring sensor sets up the circuit through the working parameter and realizes the intelligent learning function to sensor parameter setting. The sensor is provided with a learning function to adjust the working state of the device. The learning function enables the material level sensor to automatically learn and shield background interference, the detection function of the material level sensor is more accurate and convenient to realize, and errors and inconvenience caused by manual adjustment are avoided. Meanwhile, the working parameter setting circuit can be switched to a high-low point to set an output control circuit, and the material level percentage is switched to display the material level condition in the bin, so that the bin is observed more visually.
On the basis of the technical scheme, the following improvements can be made:
preferably, the circuit part further includes: and the output protection circuit is electrically connected with the output control circuit and is used for realizing reverse polarity protection, short circuit protection and overload protection.
By adopting the preferable scheme, the circuit protection is realized.
Preferably, the output control circuit includes: a switching value output circuit and an analog value output circuit;
the singlechip output I/O of the MCU control circuit is electrically connected with the switching value output circuit;
the singlechip output I/O of the MCU control circuit is electrically connected with the analog output circuit through a D/A conversion circuit.
By adopting the preferable scheme, the switching value output circuit can output corresponding switching values through the NPN triode and the PNP triode, and the analog value output circuit can output 0-10V and 4-20 mA analog values.
Preferably, the output protection circuit is electrically connected with the switching value output circuit;
the output protection circuit includes: and the self-recovery fuse is connected in series in the switching value output circuit.
By adopting the preferable scheme, short-circuit protection is realized.
As the preferred scheme, the singlechip input I/O of the MCU control circuit is connected with a working parameter setting circuit through a current limiting resistor, and the working parameter setting circuit is used for learning the material level height and setting the switching value output to be normally open and normally closed.
By adopting the preferable scheme, the working parameter setting circuit is subjected to circuit protection.
Preferably, the display circuit includes: and at least two seven-segment digital tubes for displaying capacitance value and/or material level percentage.
By adopting the preferable scheme, the nixie tube capacitor display can also carry out material level percentage display and switch point display through menu setting.
Preferably, the display circuit further includes: the LED lamps are used for displaying the material level percentage, and the two status indicator lamps are respectively used for power-on indication and output indication;
the LED lamp is electrically connected with the output I/0 of the singlechip of the MCU control circuit through a multi-path shift register;
the two status indicator lamps are electrically connected with the output I/0 of the single chip microcomputer of the MCU control circuit through a current limiting resistor.
By adopting the preferable scheme, the percentage is represented by the number of the LEDs, and the two status indicator lamps are respectively used for power-on indication and output indication, so that an operator can feel more intuitively.
As a preferred scheme, the power supply circuit is provided with an isolation assembly, and the isolation assembly comprises: the magnetic bead and choke coil, choke coil set up in the input of power, the parallelly connected magnetic bead of choke coil, power supply circuit is connected with the casing and is connected the ground.
By adopting the preferable scheme, the power circuit is provided with anti-interference, anti-static and anti-lightning components such as magnetic beads and choke coils, so as to isolate and shield high-frequency and common-mode interference signals in the power supply and prevent signal deformation; meanwhile, the power supply is connected with the shell and grounded to release redundant charges and interference inside the circuit, and the circuit has strong lightning protection and anti-interference performances.
Preferably, the method further comprises the following steps: and the bidirectional level conversion circuit is respectively and electrically connected with the MCU control circuit and the capacitance measuring circuit and is used for processing the interactive signals of the MCU control circuit and the capacitance measuring circuit.
By adopting the preferable scheme, the sensor has higher reliability and better stability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a block diagram of a circuit portion of a continuity level monitoring sensor according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a continuity level monitoring sensor provided by the embodiment of the present invention.
Wherein: 1-shell, 2-measuring probe, 31-power circuit, 32-MCU control circuit, 33-display circuit, 34-capacitance measuring circuit, 35-output control circuit, 36-working parameter setting circuit and 37-output protection circuit.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The expression "comprising" an element is an "open" expression which merely means that there are corresponding parts, which should not be interpreted as excluding additional parts.
In order to achieve the object of the present invention, in some embodiments of the continuous level monitoring sensor, as shown in fig. 1 and 2, the continuous level monitoring sensor comprises: casing 1, measuring probe 2 and circuit part, the circuit part sets up in casing 1, and the circuit part includes:
a power supply circuit 31 for supplying power;
an MCU control circuit 32 for performing data processing;
the display circuit 33 is electrically connected with the MCU control circuit 32 and used for material level display;
the capacitance measuring circuit 34 is respectively and electrically connected with the MCU control circuit 32 and the measuring probe 2 and is used for detecting external capacitance change;
the output control circuit 35 is electrically connected with the MCU control circuit 32 and is used for controlling the output quantity;
and the working parameter setting circuit 36 is electrically connected with the MCU control circuit 32 and is used for setting working parameters.
The utility model discloses a continuity material level monitoring sensor sets up circuit 36 through the operating parameter and realizes the intelligent learning function to sensor parameter setting. The sensor is provided with a learning function to adjust the working state of the device. The learning function enables the material level sensor to automatically learn and shield background interference, the detection function of the material level sensor is more accurate and convenient to realize, and errors and inconvenience caused by manual adjustment are avoided. Meanwhile, the working parameter setting circuit 36 can be switched to a high-low point to set the output control circuit 35, and the material level percentage can be switched to display the material level condition in the bin more visually.
It should be noted that the measuring probe 2 may be, but is not limited to, a solid metal round bar, a solid metal prism, a hollow metal round bar, or a hollow metal prism as an input terminal for external signal variation, and is connected to the capacitance measuring circuit 34.
In order to further optimize the implementation effect of the present invention, in other embodiments, the rest of the feature technologies are the same, except that the circuit part further includes: and the output protection circuit 37, the output protection circuit 37 and the output control circuit 35 are electrically connected and used for realizing reverse polarity protection, short circuit protection and overload protection.
By adopting the preferable scheme, the circuit protection is realized.
In order to further optimize the effect of the present invention, on the basis of the above embodiment, the output control circuit 35 includes: a switching value output circuit and an analog value output circuit;
the singlechip output I/O of the MCU control circuit 32 is electrically connected with the switching value output circuit;
the singlechip output I/O of the MCU control circuit 32 is electrically connected with the analog output circuit through a D/A conversion circuit.
By adopting the preferable scheme, the switching value output circuit can output corresponding switching values through the NPN triode and the PNP triode, and the analog value output circuit can output 0-10V and 4-20 mA analog values.
The D/a conversion circuit may employ a digital-to-analog converter for converting a digital signal into an analog voltage signal, the MCU control circuit 32 processes the signal received from the capacitance measuring circuit 34, quantizes the signal and transmits the digital signal to the D/a conversion circuit according to a set ratio, the D/a conversion circuit converts the received digital signal into an analog signal and provides a reference voltage for the output circuit, and the output of the output control circuit 35 is controlled by controlling the signal transmitted from the MCU control circuit 32 to the D/a conversion circuit to change the magnitude of the output analog quantity.
In order to further optimize the implementation effect of the present invention, on the basis of the above embodiment, the output protection circuit 37 is electrically connected to the switching value output circuit;
the output protection circuit 37 includes: and the self-recovery fuse is connected in series in the switching value output circuit.
By adopting the preferable scheme, short-circuit protection is realized. The self-recovery fuse is connected in series in the output circuit and is connected with the drain electrode of an MOS tube in the output circuit, the MOS tube is of an N-channel enhancement type, and when the grid receives a high level given by an I/O port of the singlechip, the drain electrode of the MOS tube is controlled to be conducted, so that the output circuit works.
When a short-circuit event occurs, the current flowing through the fuse is increased and exceeds the rated value of the fuse, the fuse is disconnected, the output is closed, and therefore the purpose of short-circuit protection is achieved.
In order to further optimize the utility model discloses an implement the effect, in some other embodiments, all the other characteristic techniques are the same, and the difference lies in, MCU control circuit 32's singlechip input IO passes through current-limiting resistance and is connected with working parameter setting circuit 36, and working parameter setting circuit 36 is used for studying the material level height and sets for the normally closed of switching value output normally open.
With the above preferred scheme, the operating parameter setting circuit 36 is subjected to circuit protection.
In order to further optimize the effect of the present invention, in other embodiments, the rest of the feature technologies are the same, except that the display circuit 33 includes: and at least two seven-segment digital tubes for displaying capacitance value and/or material level percentage.
By adopting the preferable scheme, the nixie tube capacitor display can also carry out material level percentage display and switch point display through menu setting.
In order to further optimize the implementation effect of the present invention, on the basis of the above embodiment, the display circuit 33 further includes: ten LED lamps and/or two state indicating lamps displaying different colors are arranged in a straight line, the ten LED lamps are used for displaying the material level percentage, and the two state indicating lamps are respectively used for power-on indication and output indication;
the ten LED lamps are electrically connected with the output I/0 of the single chip microcomputer of the MCU control circuit 32 through a multi-path shift register;
the two status indicator lamps are electrically connected with the output I/0 of the single chip microcomputer of the MCU control circuit 32 through a current limiting resistor.
With the above preferred scheme, the percentage is expressed by the number of the LEDs emitting light, and each LED lamp represents one tenth of the height of the material level, but the number of the LED lamps is not limited to 10, and can be 5, 6, 7 and the like. The two state indicating lamps are used for indicating the working state of the sensor, so that an operator can feel more intuitively.
In order to further optimize the effect of the present invention, in other embodiments, other features are the same, except that the power circuit 31 is provided with an isolation assembly, and the isolation assembly includes: the magnetic bead and choke coil, choke coil set up in the input of power, choke coil parallel connection magnetic bead, power supply circuit 31 is connected with casing 1 and is connected the ground.
By adopting the above preferred scheme, the power circuit 31 is provided with anti-interference, anti-static and anti-lightning components such as magnetic beads and choke coils to isolate and shield high-frequency and common-mode interference signals in the power supply and prevent signal deformation; meanwhile, the power supply is connected with the shell 1 and is grounded to release redundant charges and interference inside the circuit, and the circuit has strong lightning protection and anti-interference performances.
In order to further optimize the implementation effect of the present invention, in other embodiments, the rest of the feature technologies are the same, and the difference is that the present invention further includes: and the bidirectional level conversion circuit is electrically connected with the MCU control circuit 32 and the capacitance measuring circuit 34 respectively and is used for processing interaction signals of the MCU control circuit 32 and the capacitance measuring circuit 34.
By adopting the preferable scheme, the MCU control circuit adopts 5V power supply, and the capacitance measuring circuit adopts 3.3V power supply, so that the two parts use the bidirectional level conversion circuit to protect the capacitance measuring circuit from abnormal work due to different voltages when exchanging data, and the sensor has higher reliability and better stability.
In order to further optimize the implementation effect of the present invention, in other embodiments, the rest of the feature technologies are the same, except that the power source in the power circuit may include one or more of the following: commercial power, photovoltaic power supply unit, wind-force power supply unit, power supply circuit can also include simultaneously: the storage battery can prevent the sensor from continuously working under the condition of accidental power failure.
The various embodiments above may be implemented in cross-parallel.
The utility model discloses a continuous material level monitoring sensor, its signal that adopts independent integrated chip to handle the sensor collection avoids the parasitic electromagnetic interference of analog device, and module self inside can be set for frequency band gain isoparametric by software, compares ordinary passive device and handles the convenience, and integrated function is abundant can satisfy different occasion demands.
The utility model discloses following beneficial effect has: the reliability is high, the detection precision is high, stability is good, not influenced by the temperature, the interference killing feature is strong, the demonstration is directly perceived, and is mutual simple, and what can relax realizes through the button learning mode.
The above embodiments are only for illustrating the technical conception and the features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention can not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.
Claims (9)
1. A continuous level monitoring sensor comprising: casing, measuring probe and circuit part, the circuit part set up in the casing, its characterized in that, the circuit part includes:
a power supply circuit for supplying power;
the MCU control circuit is used for processing data;
the display circuit is electrically connected with the MCU control circuit and is used for material level display;
the capacitance measuring circuit is respectively and electrically connected with the MCU control circuit and the measuring probe and is used for detecting external capacitance change;
the output control circuit is electrically connected with the MCU control circuit and is used for controlling the output quantity;
and the working parameter setting circuit is electrically connected with the MCU control circuit and is used for setting working parameters.
2. The continuous level monitoring sensor of claim 1, wherein the circuit portion further comprises: and the output protection circuit is electrically connected with the output control circuit and is used for realizing reverse polarity protection, short circuit protection and overload protection.
3. The continuous level monitoring sensor of claim 2, wherein the output control circuit comprises: a switching value output circuit and an analog value output circuit;
the singlechip output I/O of the MCU control circuit is electrically connected with the switching value output circuit;
and the singlechip output I/O of the MCU control circuit is electrically connected with the analog output circuit through a D/A conversion circuit.
4. The continuous level monitoring sensor of claim 3, wherein the output protection circuit is electrically connected to the switching value output circuit;
the output protection circuit includes: and the self-recovery fuse is connected in series in the switching value output circuit.
5. The continuous material level monitoring sensor according to any one of claims 1 to 4, wherein a single chip input I/O of the MCU control circuit is connected with the working parameter setting circuit through a current limiting resistor, and the working parameter setting circuit is used for learning material level height and setting switching value output to be normally open and normally closed.
6. The continuous level monitoring sensor of any one of claims 1 to 4, wherein the display circuit comprises: and at least two seven-segment digital tubes for displaying capacitance value and/or material level percentage.
7. The continuous level monitoring sensor of claim 6, wherein the display circuit further comprises: the LED lamps are used for displaying the material level percentage, and the two status indicator lamps are respectively used for power-on indication and output indication;
the LED lamp is electrically connected with the output I/O of the singlechip of the MCU control circuit through a multi-path shift register;
the two status indicator lamps are electrically connected with the output I/O of the singlechip of the MCU control circuit through a current-limiting resistor.
8. The continuous level monitoring sensor of any one of claims 1 to 4, wherein the power circuit is provided with an isolation assembly comprising: the magnetic bead and choke coil, choke coil sets up in the input of power, choke coil connects the magnetic bead in parallel, power supply circuit with the casing is connected and ground.
9. The continuous level monitoring sensor of any one of claims 1-4, further comprising: and the bidirectional level conversion circuit is respectively and electrically connected with the MCU control circuit and the capacitance measurement circuit and is used for processing the interactive signals of the MCU control circuit and the capacitance measurement circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022345654.1U CN213147993U (en) | 2020-10-20 | 2020-10-20 | Continuous material level monitoring sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022345654.1U CN213147993U (en) | 2020-10-20 | 2020-10-20 | Continuous material level monitoring sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213147993U true CN213147993U (en) | 2021-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022345654.1U Active CN213147993U (en) | 2020-10-20 | 2020-10-20 | Continuous material level monitoring sensor |
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|---|---|
| CN (1) | CN213147993U (en) |
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- 2020-10-20 CN CN202022345654.1U patent/CN213147993U/en active Active
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