CN218822627U

CN218822627U - Ultrasonic liquid level switch sensor

Info

Publication number: CN218822627U
Application number: CN202223075253.4U
Authority: CN
Inventors: 郭晶; 许林; 鲁晓风; 张欣; 唐少华; 徐中天; 张吉山
Original assignee: 711th Research Institute of CSIC
Current assignee: 711th Research Institute of CSIC
Priority date: 2022-11-18
Filing date: 2022-11-18
Publication date: 2023-04-07
Anticipated expiration: 2032-11-18

Abstract

The application provides an ultrasonic wave liquid level switch sensor, including host computer and ultrasonic transducer, the host computer with ultrasonic transducer connects, ultrasonic transducer carries out liquid level detection and produces the detected signal transmission extremely to the environment of locating the host computer, be provided with signal processing circuit in the host computer, signal processing circuit is right detected signal handles, handles and reachs ultrasonic wave liquid level switch sensor's operating condition information and transmission give external equipment. The ultrasonic liquid level switch sensor is simple in structure, convenient to assemble and disassemble, capable of achieving normal state monitoring and fault diagnosis, good in reliability and maintainability, suitable for various working environments and long in service life.

Description

Ultrasonic liquid level switch sensor

Technical Field

The application relates to the technical field of ship industrial equipment, in particular to an ultrasonic liquid level switch sensor.

Background

The liquid level sensor used for measuring liquid level in the cabin at present is a float type liquid level meter based on Archimedes' law and magnetic coupling principle, when the float type liquid level meter is immersed in liquid, the float is subjected to the combined action of three forces of downward gravity, upward buoyancy and spring elasticity, and the compression and release of the spring drive an indicator to indicate the liquid level so as to realize the liquid level measurement and alarm functions. The conventional float type liquid level sensor is often blocked and blocked by dirty liquid such as oil stain when in use, and fault information cannot be transmitted timely when the liquid level sensor fails and cannot work normally, so that the measurement result and the service life are influenced.

SUMMERY OF THE UTILITY MODEL

The application aims to provide an ultrasonic liquid level switch sensor capable of achieving normal state monitoring and fault diagnosis.

For realizing above-mentioned purpose, this application provides an ultrasonic wave level switch sensor, including host computer and ultrasonic transducer, the host computer with ultrasonic transducer connects, ultrasonic transducer carries out liquid level detection and produces the detected signal transmission extremely to the environment of locating the host computer, be provided with signal processing circuit in the host computer, signal processing circuit is right detected signal handles, handles and reachs ultrasonic wave level switch sensor's operating condition information and transmits for external equipment.

Further, the signal processing circuit comprises a voltage stabilizer, a rectifier bridge stack, a first socket, a second socket, a first diode, a second diode, a first resistor, a first capacitor and a first electrolytic capacitor, wherein the first socket is connected with the ultrasonic probe and receives the detection signal from the ultrasonic probe, a first interface of the first socket is connected with a first end of the first resistor, a first end of the first diode, a first end of the second diode, a first end of the first electrolytic capacitor and a first pin of the voltage stabilizer, a second interface of the first socket is connected with a second end of the first resistor, and a third interface of the first socket is grounded; the second end of the first diode is connected with the second end of the second diode, the second end of the first electrolytic capacitor, the second pin and the third pin of the voltage stabilizer and grounded; the eighth pin of the voltage stabilizer is connected with the first end of the first capacitor and the third pin of the rectifier bridge stack, and the second end of the first capacitor is connected with the sixth pin and the seventh pin of the voltage stabilizer and grounded; a first pin of the rectifier bridge stack is connected with a first interface of the second socket, a second pin of the rectifier bridge stack is connected with a second interface of the second socket, and a fourth pin of the rectifier bridge stack is grounded; the second socket is connected with the external equipment.

Further, the host computer includes host computer casing, host computer apron, connecting piece and filling part, the filling part is filled the inside of host computer casing, the host computer apron with pass through between the host computer casing the connecting piece is connected and is fixed.

Further, a sealing ring is arranged between the host shell and the host cover plate.

Further, the ultrasonic probe is provided with a receiving/transmitting pole which is of a semi-cylindrical symmetrical structure, and the distance between the receiving/transmitting poles is 8 +/-0.5 mm.

Further, the host is connected with the ultrasonic probe through threads and nuts.

Further, ultrasonic wave liquid level switch sensor still includes communication cable and terminal box, the terminal box pass through communication cable with the host computer is connected, the host computer still is provided with the confession communication cable passes through the through-hole and is used for connecting communication cable's cable joint.

Further, the main machine further comprises a fixing piece, wherein a threaded hole is formed in the fixing piece and used for installing the main machine to a working position.

Further, the filling part is made of silicon rubber, and the connecting piece is a screw.

Has the advantages that: the application provides an ultrasonic wave liquid level switch sensor, including host computer and ultrasonic transducer, the host computer with ultrasonic transducer connects, ultrasonic transducer carries out liquid level detection and produces the detected signal transmission extremely to the environment of locating the host computer, be provided with signal processing circuit in the host computer, signal processing circuit is right detected signal handles, handles and reachs ultrasonic wave liquid level switch sensor's operating condition information and transmission give external equipment. The ultrasonic liquid level switch sensor is simple in structure, convenient to assemble and disassemble, capable of achieving normal state monitoring and fault diagnosis, good in reliability and maintainability, applicable to various working conditions and long in service life.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a sensor according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a sensor according to another embodiment of the present disclosure;

fig. 3 is a circuit diagram of a signal processing circuit according to an embodiment of the present application;

fig. 4 is a schematic diagram of an operating state of a sensor according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless otherwise specified, the use of directional terms such as "upper", "lower", "left" and "right" generally refer to upper, lower, left and right in the actual use or operation of the device, and specifically to the orientation of the drawing figures.

The present application provides an ultrasonic level switch sensor, which is described in detail below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments of the present application. In the following embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to related descriptions of other embodiments for parts that are not described in detail in a certain embodiment.

In the embodiments and claims, the articles "a", "an", "the" and "the" may include plural forms as well, unless the context specifically dictates otherwise. If in the embodiments of the present application there is a description relating to "first", "second", etc., the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature.

It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

As shown in fig. 1, the application provides an ultrasonic wave liquid level switch sensor, including host computer 100 and ultrasonic probe 200, host computer 100 with ultrasonic probe 200 connects, ultrasonic probe 200 carries out liquid level detection and produces detected signal transmission extremely to the environment of locating host computer 100, be provided with signal processing circuit in the host computer 100, signal processing circuit is right detected signal handles, handles and reachs ultrasonic wave liquid level switch sensor's operating condition information transmits for external equipment. The ultrasonic liquid level switch sensor is simple in structure, convenient to assemble and disassemble, good in reliability and maintainability, suitable for various working environments and long in service life, and normal state monitoring and fault diagnosis are achieved through the host machine 100 and the ultrasonic probe 200. In a specific embodiment, the main unit 100 is connected to the ultrasonic probe 200 through a screw and a hexagon nut, and the main unit 100 and the ultrasonic probe 200 have simple structures, are convenient to assemble and disassemble, and are beneficial to practical use.

As shown in fig. 1 and 2, the main unit 100 includes a main unit cover plate 110, a main unit casing 120, a connecting member 130 and a filling portion 140, the filling portion 140 is filled in the main unit casing 120, the main unit cover plate 110 and the main unit casing 120 are connected and fixed by the connecting member 130, and a sealing ring is further disposed between the main unit casing 120 and the main unit cover plate 110 to achieve a good sealing effect. In one embodiment, the material of the filling part 140 is silicon rubber, the connecting part 130 is a screw, and the connecting part 130 is a cross-recessed countersunk head screw. Since the host 100 is further provided therein with a signal processing circuit, signals and power lines of the signal processing circuit extend out of the host 100 through a through hole provided above the host 100, in a specific embodiment, the through hole may be sealed by a stuffing box or an explosion-proof stuffing box. The host computer 100 is through setting up filling portion 140 and host computer apron 110 can with signal processing circuit seals well in the inside of host computer 100, prevents that signal processing circuit from receiving the influence of accident such as collision, soaking, has played the guard action to signal processing circuit, in addition host computer apron 110 with pass through between the host computer casing 120 connecting piece 130 connects, makes host computer apron 110's installation and dismantlement are all very convenient, are favorable to the right the inside signal processing circuit of host computer 100 maintains and changes.

Specifically, as shown in fig. 3, the signal processing circuit includes a voltage regulator U1, a bridge rectifier B1, a first socket J1, a second socket X1, a first diode Z1, a second diode Z2, a first resistor R1, a first capacitor C1, and a first electrolytic capacitor E1, where the first socket J1 is connected to the ultrasonic probe 200 and receives the detection signal from the ultrasonic probe 200, a first interface of the first socket J1 is connected to a first end of the first resistor R1, a first end of the first diode Z1, a first end of the second diode Z2, a first end of the first electrolytic capacitor E1, and a first pin of the voltage regulator U1, a second interface of the first socket J1 is connected to a second end of the first resistor R1, and a third interface of the first socket J1 is grounded; a second end of the first diode Z1 is connected with a second end of the second diode Z2, a second end of the first electrolytic capacitor E1, a second pin and a third pin of the voltage stabilizer U1 and is grounded; an eighth pin of the voltage stabilizer U1 is connected to the first end of the first capacitor C1 and the third pin of the rectifier bridge stack B1, and a second end of the first capacitor C1 is connected to the sixth pin and the seventh pin of the voltage stabilizer U1 and grounded; a first pin of the rectifier bridge stack B1 is connected with a first interface of the second socket X1, a second pin of the rectifier bridge stack B1 is connected with a second interface of the second socket X1, and a fourth pin of the rectifier bridge stack B1 is grounded; and the second socket X1 is connected with the external equipment and outputs working state information. In practical application, when the ultrasonic liquid level switch sensor is in a low liquid level state and the ultrasonic probe 200 does not act, the standby current is 4 +/-1 mA; when the ultrasonic liquid level switch sensor is in a low liquid level state and the ultrasonic probe 200 operates, the internal circuit is turned on to generate a current of about 13mA, and the current is finally 17 ± 1mA by adding the original standby current. When the ultrasonic probe 200 is in a low liquid level state, the current of 4 +/-1 mA is output, when the ultrasonic probe 200 is in a high liquid level state, the current of 16 +/-1 mA is output, when the ultrasonic probe 200 fails, the current is lower than 1mA, the power supply of the ultrasonic probe 200 is wide-voltage input, the external voltage changes between 9 v and 30v, and the constant current output of the circuit is not influenced. The signal processing circuit can obtain the working state information of the ultrasonic liquid level switch sensor through the output current, and judge that the ultrasonic liquid level switch sensor is in a high liquid level state, a low liquid level state or a fault state, so that the maintainability of the sensor is improved, and the service life is prolonged.

Further, as shown in fig. 1, the main body 100 further includes a fixing member 150, and the fixing member 150 is provided with a screw hole 151 for mounting the main body 100 to an operating position. In practical application, the ultrasonic liquid level switch sensor of this application can be applied to among the marine vessel and other industrial equipment, realizes liquid level measurement and the warning to multiple liquid type and state, as shown in fig. 4, the ultrasonic liquid level switch sensor can pass through the liquid level of fixing member 150 vertical installation comes to detect the cabin on the cabin bulkhead, makes the installation of ultrasonic liquid level switch sensor and dismantlement are simple swift.

Further, as shown in fig. 1, the ultrasonic probe 200 is provided with a transmitting/receiving pole 210. The ultrasonic liquid level switch sensor is often influenced by physicochemical properties of immersed liquid when applied to the work of marine vessels and other industrial equipment, for example, the temperature, color, acid-base corrosivity and viscosity of the liquid and solid-liquid impurities mixed in the liquid all influence the measurement accuracy, and the ultrasonic probe 200 adopts an ultrasonic principle to measure and can be suitable for various working environments. Firstly, since the ultrasonic probe 200 is an open type measurement, unlike a float-type immersion sensor, the liquid is not collected into the container, and the liquid to be measured is always in an open state, so that the influence of the physical and chemical state of the liquid on the ultrasonic probe 200 itself can be reduced. Secondly, the ultrasonic probe 200 also adopts a distance measurement mode, the distance between the transmitting/receiving electrodes 210 is kept constant, the signal measurement period of the ultrasonic liquid level switch sensor is basically constant, the transmitting/receiving electrodes 210 are all part of the ultrasonic probe 200, and the installation height of the ultrasonic liquid level switch sensor can be flexibly adjusted according to specific requirements. Finally, the transmitting/receiving electrode 210 of the ultrasonic probe 200 has a semi-cylindrical symmetrical structure, which can reduce the interference in the process of transmitting and receiving ultrasonic signals. Specifically, considering that there is a measurement blind area in ultrasonic detection, the distance between the transmitting/receiving electrodes 210 is 8 ± 0.5mm, if the distance is too large, signal interference will be increased, and if the distance is too small, an ultrasonic detection blind area will appear or blockage will be caused by dirty oil and sewage, and the failure probability can be reduced by reasonably controlling the distance between the transmitting/receiving electrodes 210. And ultrasonic transducer 200 wholly adopts welded stainless steel construction, and the surface is seamless, can not make liquid infiltration, also does not set up movable part, avoids losing the condition that leads to the damage because of the part, long service life.

In practical application, when the cabin is soaked to reach the alarm water level, the ultrasonic liquid level switch sensor is in a high liquid level state, liquid is filled between the transmitting/receiving electrodes 210 of the ultrasonic probe 200, the transmission capacity is greatly enhanced when ultrasonic waves are transmitted in the liquid, and a detection signal is processed and then output in 17 +/-1 mA analog quantity; when the immersion water level of the cabin is lower than a set position, the ultrasonic liquid level switch sensor is in a low liquid level state, air is filled between the transmitting/receiving electrodes 210 of the ultrasonic probe 200, and due to the fact that the ultrasonic waves are seriously attenuated when being transmitted in the air, detection signals are output in an analog quantity of 4 +/-1 mA after being processed; when the ultrasonic probe 200 has a fault, the current is lower than 1mA, the power supply of the ultrasonic probe 200 is wide-voltage input, the external voltage is changed between 9 and 30v, and the constant current output of the circuit is not influenced. Can judge through adopting analog output ultrasonic wave liquid level switch sensor's operating condition information is in high liquid level state, low liquid level state or fault state, can in time discover and maintain when breaking down, has effectively improved ultrasonic wave liquid level switch sensor's maintainability, has prolonged life.

Further, as shown in fig. 1, the ultrasonic level switch sensor further includes a communication cable 300 and a junction box 400, the junction box 400 includes a washer set 410 and a clamping nut 420, the junction box 400 is connected with the main unit 100 through the communication cable 300, and the main unit 100 is further provided with a through hole for the communication cable 300 to pass through and a cable connector 160 for connecting the communication cable. The communication cable 300 is connected to the junction box 400, and wires inside the communication cable 300 are connected in the junction box 400 to protect the wires and connect the wires.

To sum up, this application provides an ultrasonic wave liquid level switch sensor, including host computer and ultrasonic transducer, the host computer with ultrasonic transducer connects, ultrasonic transducer carries out liquid level detection and produces detected signal transmission extremely to the environment of locating the host computer, be provided with signal processing circuit in the host computer, signal processing circuit is right detected signal handles, and the processing reachs ultrasonic wave liquid level switch sensor's operating condition information transmits for external equipment. The ultrasonic liquid level switch sensor is simple in structure, convenient to assemble and disassemble, capable of achieving normal state monitoring and fault diagnosis, good in reliability and maintainability, suitable for various working conditions and long in service life.

The ultrasonic liquid level switch sensor provided by the present application is described in detail above, and the principle and the implementation of the present application are explained in the present application by applying specific examples, and the description of the above examples is only used to help understanding the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. The utility model provides an ultrasonic wave liquid level switch sensor, its characterized in that, includes host computer and ultrasonic transducer, the host computer with ultrasonic transducer connects, ultrasonic transducer carries out liquid level detection and produces detected signal transmission extremely to the environment of locating the host computer, be provided with signal processing circuit in the host computer, signal processing circuit is right detected signal handles, and the processing reachs ultrasonic wave liquid level switch sensor's operating condition information transmits for external equipment.

2. The ultrasonic liquid level switch sensor according to claim 1, wherein the signal processing circuit comprises a voltage stabilizer, a rectifier bridge stack, a first socket, a second socket, a first diode, a second diode, a first resistor, a first capacitor, a first electrolytic capacitor, the first socket is connected to the ultrasonic probe and receives the detection signal from the ultrasonic probe, a first interface of the first socket is connected to a first end of the first resistor and a first end of the first diode, a first end of the second diode, a first end of the first electrolytic capacitor and a first pin of the voltage stabilizer, a second interface of the first socket is connected to a second end of the first resistor, and a third interface of the first socket is grounded; the second end of the first diode is connected with the second end of the second diode, the second end of the first electrolytic capacitor, the second pin and the third pin of the voltage stabilizer and grounded; the eighth pin of the voltage stabilizer is connected with the first end of the first capacitor and the third pin of the rectifier bridge stack, and the second end of the first capacitor is connected with the sixth pin and the seventh pin of the voltage stabilizer and grounded; a first pin of the rectifier bridge stack is connected with a first interface of the second socket, a second pin of the rectifier bridge stack is connected with a second interface of the second socket, and a fourth pin of the rectifier bridge stack is grounded; the second socket is connected with the external equipment.

3. The ultrasonic liquid level switch sensor according to claim 1, wherein the main unit comprises a main unit housing, a main unit cover plate, a connecting member and a filling portion, the filling portion is filled in the main unit housing, and the main unit cover plate and the main unit housing are connected and fixed through the connecting member.

4. The ultrasonic level switch sensor of claim 3, wherein a seal ring is further disposed between the main housing and the main cover.

5. The ultrasonic level switch sensor according to claim 1, wherein the ultrasonic probe is provided with a receiving/transmitting pole, the receiving/transmitting pole is of a semi-cylindrical symmetrical structure, and the distance between the receiving/transmitting poles is 8 ± 0.5mm.

6. The ultrasonic level switch sensor of claim 1, wherein the host is connected to the ultrasonic probe by a thread and a nut.

7. The ultrasonic level switch sensor according to claim 1, further comprising a communication cable and a junction box, wherein the junction box is connected with the host machine through the communication cable, and the host machine is further provided with a through hole for the communication cable to pass through and a cable connector for connecting the communication cable.

8. The ultrasonic level switch sensor of claim 1, wherein the main unit further comprises a mounting member having a threaded hole for mounting the main unit in an operating position.

9. The ultrasonic level switch sensor of claim 3, wherein the material of the filler is silicone rubber and the connector is a screw.