CN212903452U - Radio frequency admittance sensor based on 555 timer and analog switch - Google Patents
Radio frequency admittance sensor based on 555 timer and analog switch Download PDFInfo
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- CN212903452U CN212903452U CN202022189005.7U CN202022189005U CN212903452U CN 212903452 U CN212903452 U CN 212903452U CN 202022189005 U CN202022189005 U CN 202022189005U CN 212903452 U CN212903452 U CN 212903452U
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Abstract
The utility model discloses a radio frequency admittance sensor based on 555 timer and analog switch, including the radio frequency admittance sensor body, the radio frequency admittance sensor body includes the casing and sets up the sensor in the casing bottom and sets up the end cover at the casing top, the inside of casing is provided with control circuit board, last microprocessor, analog switch and the 555 timer of being provided with of control circuit board; the sensor comprises a detection rod and a shielding layer arranged on the outer side of the detection rod, and a ground pole connected with the shell is arranged on the shielding layer. The utility model discloses compare with traditional radio frequency admittance sensor, the 555 timer that sets up on its control circuit board can let the signal conversion that the sensor detected be the signal that the singlechip can detect, and the analog switch of setting can effectively control the signal connection or the disconnection between 555 timer and the singlechip for radio frequency admittance sensor has characteristics such as energy-conservation, low power dissipation.
Description
Technical Field
The utility model relates to a sensor field especially relates to radio frequency admittance sensor based on 555 timer and analog switch.
Background
The radio frequency admittance sensor, i.e. the radio frequency admittance material level meter, is a new generation of intelligent continuous material level measuring instrument. The RF detection technology and modern microcomputer processing technology are adopted, so that the problems of large temperature drift, difficult calibration and fear of adhesion of the traditional level meter are solved, and the admittance material level meter is widely applied to continuous measurement of liquid, particle and block material bin material levels in various industries. The admittance material level meter is initiated at home and abroad by adopting a special impact-resistant and wear-resistant probe rod sheath material, is particularly suitable for measurement in the environment with high temperature, high pressure, strong corrosion, strong adhesion, strong impact, strong wear and large dust, and has incomparable cost performance compared with other types of material level meters. For example, the utility model with application number CN201220572764.4 discloses a radio frequency admittance level meter, which is composed of a meter case and a sensor, wherein a controller is arranged in the meter case; the sensor part comprises a detection rod, a shielding layer is sleeved outside the detection rod, an insulating layer is arranged between the detection rod and the shielding layer, a ground pole is sleeved outside the shielding layer, the insulating layer is also arranged between the shielding layer and the ground pole, and the rear end of the ground pole is connected with the meter shell; the rear half part of the earth pole is provided with a plurality of radiating holes, the rearmost ends of the detection rod and the shielding layer are positioned in front of the foremost radiating holes, the rear end of the detection rod is connected with a detection rod wiring terminal of the controller through a wire, and the rear end of the shielding layer is connected with a shielding wiring terminal of the controller through a shielding wire. The temperature of the measured medium cannot be transmitted to the meter shell; for another example, the utility model patent with application number cn201720633507.x discloses a novel radio frequency admittance level meter, which comprises a meter head and a sensor, wherein the end of the meter head is connected with the sensor through a connector, the sensor is sequentially provided with a ground pole layer, an insulating layer one, a shielding layer, an insulating layer two and a detection electrode from outside to inside, the sensor is sequentially connected with an oscillator and a controller after being respectively connected with a driver and an alternating current phase discrimination sampler, and the end of the detection electrode is provided with a connector and is connected with an extension line and the detection head. The utility model discloses a beneficial effect does: by arranging the driver and the alternating current phase discrimination sampler, a true value of a material level can be obtained, so that the influence of hanging materials is eliminated, and the measurement precision is improved; in addition, the explosion-proof shell and the earth pole layer with the heat dissipation holes are adopted, so that the use is safer, the performance is more stable, the modular design is adopted, the interconnection of a rod type mode and a cable type mode is realized, and the application range is wider.
In summary, the rf admittance sensor has a wide application range and a large market space, and therefore, it is necessary to research an rf admittance sensor based on a 555 timer and an analog switch.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the above problem that prior art exists, provide the radio frequency admittance sensor based on 555 timer and analog switch, the utility model relates to a novelty, simple structure, convenient to use compares with traditional radio frequency admittance sensor, and the 555 timer that sets up on its control circuit board can let the signal conversion that the sensor detected be the signal that the singlechip can detect, and the analog switch of setting can effective control 555 timer and the signal connection or the disconnection between the singlechip for radio frequency admittance sensor has characteristics such as energy-conservation, low power dissipation.
For realizing above-mentioned technical purpose, reach above-mentioned technological effect, the utility model discloses a following technical scheme realizes:
the radio frequency admittance sensor based on the 555 timer and the analog switch comprises a radio frequency admittance sensor body, wherein the radio frequency admittance sensor body comprises a shell, a sensor arranged at the bottom of the shell and an end cover arranged at the top of the shell, a control circuit board is arranged in the shell, and a microprocessor, the analog switch and the 555 timer are arranged on the control circuit board; the sensor comprises a detection rod and a shielding layer arranged on the outer side of the detection rod, wherein a ground pole connected with the shell is arranged on the shielding layer, an insulating layer is arranged between the ground pole and the shielding layer, and an insulating layer is also arranged between the shielding layer and the detection rod; the rear end of the detection rod is connected with a 555 timer through a lead, the 555 timer is connected with an analog switch, and the analog switch is connected with a microprocessor. By adopting the technical scheme, the shell is used for protecting the control circuit board and electronic elements on the control circuit board; the end cover is used for closing the top of the shell; the sensor can send a signal of the level change to a 555 timer; a multivibrator formed by a 555 timer is used as a signal generating circuit and can convert signals detected by a sensor into rectangular pulse signals which can be detected by a singlechip, so that signal frequency conversion is realized; the analog switch mainly completes the signal switching function in the signal link; the microprocessor is set as a singlechip and used for processing and analyzing the received signals through an internal program so as to accurately calculate the height of the material level and send the height to an upper computer for material level display. The 555 timer is an integrated circuit chip, is often used for timers, pulse generators and oscillating circuits, and can be used as a delay device, a trigger or a starting oscillation element in the circuit; the analog switch adopts a switching mode of an MOS tube to realize the turn-off or turn-on of a signal link, is similar to a switch in function and is realized by the characteristics of an analog device to form the analog switch, the analog switch mainly plays a role in turning on or off signals in electronic equipment, and the analog switch has the characteristics of low power consumption, high speed, no mechanical contact, small volume, long service life and the like, so the analog switch is widely applied to automatic control systems and computers.
Preferably, one side of the shell is provided with an electrical interface, and the electrical interface is connected with the control circuit board. By adopting the technical scheme, the microprocessor can conveniently send the analyzed and processed signals to an external meter head or an upper computer for connection.
Preferably, the end cap is connected with the shell through a clamping groove and a screw. By adopting the technical scheme, the structure is simple, so that the end cover can be conveniently and fixedly installed.
Preferably, the sensor is connected with the shell through a connector; the connector is set as a threaded sleeve, one side of the threaded sleeve is connected with the shell through a nut, and the other side of the threaded sleeve is connected with the detection rod through threads. By adopting the technical scheme, the structure is simple, so that the sensor is connected with the shell conveniently.
Preferably, the control circuit board is further provided with an integrated voltage stabilizing circuit, and the integrated voltage stabilizing circuit is connected with each electronic element.
The utility model has the advantages that: novel in design, simple structure, convenient to use compares with traditional radio frequency admittance sensor, and the 555 timer that sets up on its control circuit board can let the signal conversion that the sensor detected be the signal that the singlechip can detect, and the analog switch who sets up can effective control 555 timer and the signal connection or the disconnection between the singlechip for radio frequency admittance sensor has characteristics such as energy-conservation, low power dissipation.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood and to be implemented according to the content of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
fig. 1 is a schematic structural diagram related to the present invention;
fig. 2 is a schematic diagram of a sensor structure according to the present invention;
fig. 3 is a schematic diagram of a circuit framework according to the present invention.
The reference numbers in the figures illustrate: the radio frequency admittance sensor comprises a radio frequency admittance sensor body 1, a shell 2, a sensor 3, an end cover 4, an electrical interface 5, a connector 6, a nut 7, a detection rod 301, a shielding layer 302, a ground pole 303 and an insulating layer 304.
Detailed Description
The invention is further described with reference to the accompanying drawings:
referring to fig. 1 to 3, the radio frequency admittance sensor based on a 555 timer and an analog switch comprises a radio frequency admittance sensor body 1, wherein the radio frequency admittance sensor body 1 comprises a shell 2, a sensor 3 arranged at the bottom of the shell 2 and an end cover 4 arranged at the top of the shell 2, a control circuit board is arranged inside the shell 2, and a microprocessor, the analog switch and the 555 timer are arranged on the control circuit board; the sensor 3 comprises a detection rod 301 and a shielding layer 302 arranged outside the detection rod 301, wherein a ground pole 303 connected with the shell is arranged on the shielding layer 302, an insulating layer 304 is arranged between the ground pole 303 and the shielding layer 302, and the insulating layer 304 is also arranged between the shielding layer 302 and the detection rod 301; the rear end of the detection rod 301 is connected with a 555 timer through a lead, the 555 timer is connected with an analog switch, and the analog switch is connected with a microprocessor. By adopting the technical scheme, the shell is used for protecting the control circuit board and electronic elements on the control circuit board; the end cover is used for closing the top of the shell; the sensor can send a signal of the level change to a 555 timer; a multivibrator formed by a 555 timer is used as a signal generating circuit and can convert signals detected by a sensor into rectangular pulse signals which can be detected by a singlechip, so that signal frequency conversion is realized; the analog switch mainly completes the signal switching function in the signal link; the microprocessor is set as a singlechip and used for processing and analyzing the received signals through an internal program so as to accurately calculate the height of the material level and send the height to an upper computer for material level display. The 555 timer is an integrated circuit chip, is often used for timers, pulse generators and oscillating circuits, and can be used as a delay device, a trigger or a starting oscillation element in the circuit; the analog switch adopts a switching mode of an MOS tube to realize the turn-off or turn-on of a signal link, is similar to a switch in function and is realized by the characteristics of an analog device to form the analog switch, the analog switch mainly plays a role in turning on or off signals in electronic equipment, and the analog switch has the characteristics of low power consumption, high speed, no mechanical contact, small volume, long service life and the like, so the analog switch is widely applied to automatic control systems and computers.
Preferably, an electrical interface 5 is arranged on one side of the housing 2, and the electrical interface 5 is connected with a control circuit board. By adopting the technical scheme, the microprocessor can conveniently send the analyzed and processed signals to an external meter head or an upper computer for connection.
Preferably, the end cap 4 is connected to the housing 2 by a snap and a screw. By adopting the technical scheme, the end cover 4 can be conveniently and fixedly installed.
Preferably, the sensor 3 is connected with the housing 2 through a connector 6; the connector 6 is a threaded sleeve, one side of the threaded sleeve is connected with the shell 2 through a nut 7, and the other side of the threaded sleeve is connected with the detection rod 301 through threads. Adopt this technical scheme, simple structure to sensor 3 is connected with casing 2.
Preferably, the control circuit board is further provided with an integrated voltage stabilizing circuit, and the integrated voltage stabilizing circuit is connected with each electronic element. DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
When the device is in actual use, the sensor detects the material level, the detected signal is sent to the 555 timer, the 555 timer converts the received signal into a signal which can be detected by the singlechip, the singlechip carries out real-time detection, processing and analysis according to an internal program so as to accurately calculate the height of the material level, and the signal is sent to the upper computer connected with the electrical interface for material level display; the analog switch is used for disconnecting the signal connection between the 555 timer and the single chip microcomputer when the material level is not changed for a long time, so that the radio frequency admittance sensor is in a low-power-consumption standby state.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. Radio frequency admittance sensor based on 555 timer and analog switch, including radio frequency admittance sensor body (1), radio frequency admittance sensor body (1) includes casing (2) and sets up sensor (3) in casing (2) bottom and end cover (4) of setting at casing (2) top, the inside of casing (2) is provided with control circuit board, its characterized in that: the control circuit board is provided with a microprocessor, an analog switch and a 555 timer; the sensor (3) comprises a detection rod (301) and a shielding layer (302) arranged on the outer side of the detection rod (301), a ground pole (303) connected with the shell is arranged on the shielding layer (302), an insulating layer (304) is arranged between the ground pole (303) and the shielding layer (302), and the insulating layer (304) is also arranged between the shielding layer (302) and the detection rod (301); the rear end of the detection rod (301) is connected with a 555 timer through a lead, the 555 timer is connected with an analog switch, and the analog switch is connected with the microprocessor.
2. The radio frequency admittance sensor of claim 1, based on a 555 timer and an analog switch, wherein: one side of the shell (2) is provided with an electrical interface (5), and the electrical interface (5) is connected with the control circuit board.
3. The radio frequency admittance sensor of claim 1, based on a 555 timer and an analog switch, wherein: the end cover (4) is connected with the shell (2) through a clamping groove and a screw.
4. The radio frequency admittance sensor of claim 1, based on a 555 timer and an analog switch, wherein: the sensor (3) is connected with the shell (2) through a connector (6); the connector (6) is arranged as a threaded sleeve, one side of the threaded sleeve is connected with the shell (2) through a nut (7), and the other side of the threaded sleeve is connected with the detection rod (301) through threads.
5. The radio frequency admittance sensor of claim 1, based on a 555 timer and an analog switch, wherein: the control circuit board is also provided with an integrated voltage stabilizing circuit, and the integrated voltage stabilizing circuit is connected with each electronic element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022189005.7U CN212903452U (en) | 2020-09-29 | 2020-09-29 | Radio frequency admittance sensor based on 555 timer and analog switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022189005.7U CN212903452U (en) | 2020-09-29 | 2020-09-29 | Radio frequency admittance sensor based on 555 timer and analog switch |
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| Publication Number | Publication Date |
|---|---|
| CN212903452U true CN212903452U (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022189005.7U Active CN212903452U (en) | 2020-09-29 | 2020-09-29 | Radio frequency admittance sensor based on 555 timer and analog switch |
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| Country | Link |
|---|---|
| CN (1) | CN212903452U (en) |
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- 2020-09-29 CN CN202022189005.7U patent/CN212903452U/en active Active
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