Liquid leakage sensor

Abstract

A liquid leakage sensor is beneficial to enabling liquid leakage monitoring to be more accurate, rapid and efficient, and is characterized by comprising a liquid leakage convergence face with an upward concave face, a prism is arranged below a center flow guide hole of the liquid leakage convergence face, a light source is arranged on the right side of the prism, and a photoelectric detector is arranged on the left side of the prism; the photoelectric detector is connected with a signal processing module, the signal processing module is respectively connected with an upper computer and an alarm module, and the prism refracts the incident direction of detection light from the light source into the emergent direction of the detection light reaching the photoelectric detector after the surface of the prism is covered by leaked liquid.

Description

Technical Field

[0001] The invention relates to the technical field of liquid leakage detection, in particular to a liquid leakage sensor. Background Art

[0002] With the digital transformation of industry, the demand for intelligent and automated leak detection technology is gradually increasing. Modern enterprises pursue efficient and intelligent production models, and hope to achieve real-time monitoring, remote control and data analysis of liquid leaks through advanced monitoring systems, thereby improving production efficiency and management level. The implementation of the digital transformation strategy has promoted the transformation of the manufacturing industry towards intelligent and efficient development, allowing enterprises to pay more attention to the refined management and monitoring of the production process.

[0003] In the field of industrial Internet, through advanced liquid leakage monitoring systems, enterprises can achieve real-time monitoring of liquid leakage, timely discover potential leakage hazards, and take corresponding preventive measures, thereby reducing production safety risks and environmental pollution risks. In addition, digital transformation also provides new opportunities for remote control and data analysis of leak detection technology. Enterprises can use remote monitoring systems to monitor and control liquid leakage in different production scenarios in real time, improving the flexibility and response speed of the production process. At the same time, through in-depth analysis and mining of leak detection data, enterprises can discover potential room for improvement, further optimize production processes, and improve management levels and production efficiency. Therefore, the digital transformation strategy provides new impetus and opportunities for the development of liquid leak detection technology, and promotes the development of leak detection technology towards intelligence and efficiency. Driven by digital transformation, liquid leak detection technology will continue to innovate and improve, providing more reliable guarantees for enterprise production safety and environmental protection.

[0004] In terms of water resources, pipeline leakage will not only lead to serious waste of water resources, but also cause losses to the local economy. In severe cases, it may even cause the water supply capacity of the municipal water supply system to decline, resulting in water supply interruption in local areas.

[0005] The existing leakage detection solutions are limited by environmental factors, have low sensitivity and other drawbacks, and are difficult to respond to water leakage incidents quickly and effectively. On the other hand, current detection technology has certain difficulties in locating the leakage point. In terms of information acquisition, traditional detection methods usually rely on limited sensor deployment and data collection points, and cannot fully obtain the real-time operating status and leakage of the pipeline system. The lack of global real-time monitoring data limits the precision and accuracy of leak point positioning, which greatly increases the time and cost of repairing water leakage problems.

[0006] Although there are many studies and applications on pipeline leakage detection at this stage, these methods often have their own disadvantages, especially for the detection of small pipeline leaks and the location of leak points, the effect is not ideal. Therefore, a leakage measurement method that can be miniaturized, low-cost, and remotely monitored is of great significance. Summary of the invention

[0007] The present invention aims at the defects or shortcomings in the prior art and provides a liquid leakage sensor, which is conducive to making liquid leakage monitoring more accurate, rapid and efficient.

[0008] The technical solution of the present invention is as follows:

[0009] A liquid leakage sensor, characterized in that it includes a liquid leakage convergence surface with a concave surface facing upward, a prism is provided below the central guide hole of the liquid leakage convergence surface, a light source is provided on the right side of the prism, a photodetector is provided on the left side of the prism, the photodetector is connected to a signal processing module, and the signal processing module is respectively connected to a host computer and an alarm module. After the surface of the prism is covered with liquid leakage, the prism refracts the incident direction of the detection light from the light source into the emitting direction of the detection light reaching the photodetector.

[0010] A drainage hole is arranged below the prism, a blocking plate is arranged at the bottom end of the drainage hole, a counterweight is arranged at the left end of the bottom surface of the blocking plate, and a fulcrum structure is arranged between the counterweight and the center line of the bottom surface of the blocking plate.

[0011] The surface of the prism is coated with an anti-reflection film.

[0012] The refractive index of the prism is 1.5-1.6.

[0013] The alarm module includes an alarm, wherein a first access terminal of the alarm is connected to the positive electrode of the first power supply through a leakage signal input port, a second access terminal of the alarm is connected to the negative electrode of the second light-emitting diode through a seventh resistor and a second resistor in sequence, the positive electrode of the second light-emitting diode is connected to the first access terminal of the alarm, a connection node between the seventh resistor and the second resistor is respectively connected to one end of a fifth resistor and an output end of a dual-path differential input voltage comparator, the other end of the fifth resistor is connected to the first access terminal of the alarm, the first access terminal of the alarm is connected to the negative electrode of the first power supply through a third capacitor and a fourth capacitor connected in parallel, the first access terminal of the alarm is connected to the negative electrode of the first diode, and the positive electrode of the first diode is connected to the The negative electrode of the first power supply is connected, the positive input end of the dual-channel differential input voltage comparator is connected to the tap of the sixth resistor, one end of the sixth resistor is connected to the positive electrode of the first light-emitting diode and then connected to the positive electrode of the first power supply through the leakage signal input port, the negative electrode of the first light-emitting diode is connected to the negative electrode of the first power supply through the first resistor, the other end of the sixth resistor is connected to the negative electrode of the first power supply, the negative input end of the dual-channel differential input voltage comparator is respectively connected to one end of the fourth resistor and the fourth end of the reflective photoelectric switch, the other end of the fourth resistor is connected to the first access end of the alarm, the third end and the second end of the reflective photoelectric switch are both connected to the negative electrode of the first power supply, and the first end of the reflective photoelectric switch is connected to the first access end of the alarm through the third resistor.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] (1) The present invention is accurate, fast and efficient, and can respond to liquid leakage more quickly.

[0016] (2) The sensor of the present invention can record parameters such as the number of leakages and reflect the severity of the leakage without manual restart.

[0017] (3) The use of the present invention can realize the prediction of liquid leakage accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a liquid leakage sensor implementing the present invention.

[0019] Figure 2 This is a picture of the preparation state of a liquid leakage sensor before a liquid dripping test of the present invention.

[0020] Figure 3 This is a state picture of a liquid leakage sensor in a liquid dripping test according to the present invention.

[0021] Figure 4 This is the response time curve of a prism with a refractive index of 1.5 and an anti-reflection coating.

[0022] Figure 5 This is the response time curve of a prism with a refractive index of 1.5 and an anti-reflection coating.

[0023] Figure 6 This is the response time curve of a prism with an anti-reflection coating and a refractive index of 1.6.

[0024] Figure 7 The present invention is a schematic diagram of the structure principle of a liquid leakage sensor.

[0025] Figure 8 The present invention is a circuit structure diagram of a liquid leakage sensor.

[0026] The accompanying drawings are listed as follows: 1-liquid sensitive module; 2-flow guide hole; 3-signal processing module; 4-packaging; 5-pin connector; 6-connecting wire; 7-host computer; 8-leakage convergence surface; 9-light source; 10-detection light incident direction; 11-prism; 12-detection light emitting direction; 13-photodetector; 14-drainage hole; 15-blocking plate; 16-fulcrum structure; 17-counterweight block; R1~R7-first resistor to seventh resistor; C3~C4-third capacitor to fourth capacitor; D1-first diode; V1-first power supply; LED1~LED2-first light-emitting diode to second light-emitting diode; LS1-alarm; F1-leakage signal input port; GP2S700HCP-reflective photoelectric switch; LM393P-dual differential input voltage comparator. DETAILED DESCRIPTION

[0027] Below is the attached figure ( Figure 1-Figure 8 ) to illustrate the present invention.

[0028] Figure 1 It is a structural schematic diagram of a liquid leakage sensor implementing the present invention. Figure 2 This is a picture of the preparation state of a liquid leakage sensor before a liquid dripping test of the present invention. Figure 3 This is a state picture of a liquid leakage sensor in a liquid dripping test according to the present invention. Figure 4 This is the response time curve of a prism with a refractive index of 1.5 and an anti-reflection coating. Figure 5 This is the response time curve of a prism with a refractive index of 1.5 and an anti-reflection coating. Figure 6 This is the response time curve of a prism with an anti-reflection coating and a refractive index of 1.6. Figure 7 The present invention is a schematic diagram of the structure principle of a liquid leakage sensor. Figure 8 This is a circuit structure diagram of a liquid leakage sensor of the present invention. Figures 1 to 8As shown, a liquid leakage sensor comprises a liquid leakage converging surface 8 with a concave surface facing upward, a prism 11 is provided below the central guide hole 2 of the liquid leakage converging surface 8, a light source 9 is provided on the right side of the prism 11, a photodetector 13 is provided on the left side of the prism 11, the photodetector 13 is connected to a signal processing module 3, and the signal processing module 3 is respectively connected to a host computer 7 and an alarm module, and the prism 11 refracts the incident direction 10 of the detection light from the light source 9 into the emitting direction 12 of the detection light reaching the photodetector 13 after the surface of the prism 11 is covered with liquid leakage.

[0029] A drainage hole 14 is provided below the prism 11, a plugging plate 15 is provided at the bottom end of the drainage hole 14, a counterweight 17 is provided at the left end of the bottom surface of the plugging plate 15, and a fulcrum structure 16 is provided between the counterweight 17 and the center line of the bottom surface of the plugging plate 15. The surface of the prism 11 is coated with an anti-reflection film. The refractive index of the prism 11 is 1.5 to 1.6.

[0030] The alarm module includes an alarm LS1, a first access end of the alarm LS1 is connected to the positive electrode of the first power supply V1 through a leakage signal input port F1, a second access end of the alarm LS1 is connected to the negative electrode of the second light-emitting diode LED2 through a seventh resistor R7 and a second resistor R2 in sequence, the positive electrode of the second light-emitting diode LED2 is connected to the first access end of the alarm LS1, a connection node of the seventh resistor R7 and the second resistor R2 is respectively connected to one end of the fifth resistor R5 and the output end of the dual-channel differential input voltage comparator LM393P, the other end of the fifth resistor R5 is connected to the first access end of the alarm LS1, the first access end of the alarm LS1 is connected to the negative electrode of the first power supply V1 through a third capacitor C3 and a fourth capacitor C4 connected in parallel, the first access end of the alarm LS1 is connected to the negative electrode of the first diode D1, and the positive electrode of the first diode D1 is connected to the negative electrode of the first power supply V1, The positive input terminal of the dual differential input voltage comparator LM393P is connected to the tap of the sixth resistor R6. One end of the sixth resistor R6 is connected to the positive electrode of the first light-emitting diode LED1 and then connected to the positive electrode of the first power supply V1 through the leakage signal input port F1. The negative electrode of the first light-emitting diode LED1 is connected to the negative electrode of the first power supply V1 through the first resistor R1. The other end of the sixth resistor R6 is connected to the negative electrode of the first power supply V1. The negative input terminal of the dual differential input voltage comparator LM393P is respectively connected to one end of the fourth resistor R4 and the fourth end of the reflective photoelectric switch GP2S700HCP. The other end of the fourth resistor R4 is connected to the first access terminal of the alarm LS1. The third end and the second end of the reflective photoelectric switch GP2S700HCP are both connected to the negative electrode of the first power supply V1. The first end of the reflective photoelectric switch GP2S700HCP is connected to the first access terminal of the alarm LS1 through the third resistor R3.

[0031] The present invention relates to a liquid leakage sensor, including a liquid leakage sensor group and a host computer. Each liquid leakage sensor includes a liquid sensitive module, a signal processing module, a communication alarm module, and a package. Liquid is gathered through the package holes and flows into the liquid sensitive module. The liquid sensitive module reflects the presence or absence of liquid through the influence of liquid on the optical refraction and reflection on the coated optical prism surface. The signal processing module not only supplies energy to the system, but also processes and feeds back information. When the communication alarm module senses a liquid leakage signal, it is displayed on the host computer. The use of the present invention can remotely monitor industrial or daily liquid leakage in real time, providing a new means for industrial production early warning, water resource leakage monitoring, etc.

[0032] A liquid leakage sensor comprises a liquid sensitive module (1), a signal processing module (3), and a host computer (7).

[0033] The package (4) has the ability to gather liquid, and can be modified to be hydrophobic (optional) according to needs, and quickly guide the liquid to the liquid sensitive module (1); the liquid sensitive module (1) detects whether there is leakage, and includes a light source, a prism, and a photodetector, wherein the prism surface may or may not be coated with an appropriate optical film according to the different refractive indices of the liquid to be tested; the signal processing module (3) supplies energy to the liquid sensitive module on the one hand, and at the same time, processes and outputs the sensing signal of the liquid sensitive module; and is connected to the host computer (7) through a connecting line (6).

[0034] The alarm module is a prompt function, which can be but not limited to LED lights, buzzers, remote transmission modules, etc.

[0035] The package (4) has a flow guide (2), and after the leakage is detected and fed back, the liquid flows out of the liquid sensitive module (1) and then enters the standby detection state again. After hydrophobic treatment (optional), the residual adhesive liquid is reduced, and no cleaning is required.

[0036] The feedback mode of the signal processing module (3) includes but is not limited to LED lights, buzzers, electrical signal transmission, and remote wireless transmission.

[0037] The liquid sensitive module (1) is placed upwards to facilitate contact with the liquid gathered by the package (4).

[0038] The signal processing module (3) can support multiple liquid leakage sensors to communicate with the host computer (7) to form a liquid leakage monitoring Internet of Things. The host computer (7) can monitor the networked liquid leakage sensor group locally or remotely.

[0039] The signal processing module (3) can select a single alarm mode (after the alarm is triggered, the alarm information is recorded and the alarm information does not disappear automatically) and a continuous alarm mode (after the alarm is triggered, the alarm information is recorded and the alarm is cancelled after a set time and the leakage sensor detection state is returned), and the leakage site prediction is realized through a deep learning algorithm (including but not limited to Transformer, CNN, LSTM, etc.).

[0040] The present invention relates to a liquid leakage sensor, including a liquid sensitive module, a signal processing module, and a host computer. The package has the ability to gather liquid and quickly guide the liquid to the liquid sensitive module. The liquid sensitive module detects whether there is leakage. The signal processing module provides functions to the liquid sensitive module on the one hand, and processes and outputs the sensing signal of the liquid sensitive module at the same time; the communication alarm module is a prompt function. The use of the present invention can be used for local or remote monitoring of leakage of various liquids, which is of great significance for energy saving, hazard monitoring, etc. The present invention can be used in related fields such as environmental detection, energy detection, chemical industry, industrial Internet, etc.

[0041] Figure 4 , Figure 5 and Figure 6 In the figure, the horizontal axis is time, the vertical axis is voltage, channel 1 is the sensor signal, and channel 2 is the remote receiving signal.

[0042] The contents not described in detail in the specification of the present invention belong to the prior art known to the professional and technical personnel in the field. It is pointed out here that the above description helps those skilled in the art to understand the invention, but does not limit the protection scope of the invention. Any equivalent replacement, modification and / or simplification of the above description without departing from the essence of the invention falls within the protection scope of the invention.

Claims

1. A liquid leakage sensor, characterized in that: It includes a leakage convergence surface with a concave surface facing upward, a prism is provided below the central guide hole of the leakage convergence surface, a light source is provided on the right side of the prism, a photodetector is provided on the left side of the prism, the photodetector is connected to a signal processing module, and the signal processing module is respectively connected to a host computer and an alarm module. After the surface of the prism is covered with leakage, the incident direction of the detection light from the light source is refracted into the emitting direction of the detection light reaching the photodetector.

2. The liquid leakage sensor according to claim 1, characterized in that: A drainage hole is arranged below the prism, a blocking plate is arranged at the bottom end of the drainage hole, a counterweight is arranged at the left end of the bottom surface of the blocking plate, and a fulcrum structure is arranged between the counterweight and the center line of the bottom surface of the blocking plate.

3. The liquid leakage sensor according to claim 1, characterized in that: The surface of the prism is coated with an anti-reflection film.

4. The liquid leakage sensor according to claim 1, characterized in that: The refractive index of the prism is 1.5-1.

6.

5. The liquid leakage sensor according to claim 1, characterized in that: The alarm module includes an alarm, wherein a first access terminal of the alarm is connected to the positive electrode of a first power supply through a leakage signal input port, a second access terminal of the alarm is connected to the negative electrode of a second light-emitting diode through a seventh resistor and a second resistor in sequence, the positive electrode of the second light-emitting diode is connected to the first access terminal of the alarm, a connection node between the seventh resistor and the second resistor is respectively connected to one end of a fifth resistor and an output end of a dual-path differential input voltage comparator, the other end of the fifth resistor is connected to the first access terminal of the alarm, the first access terminal of the alarm is connected to the negative electrode of the first power supply through a third capacitor and a fourth capacitor connected in parallel, the first access terminal of the alarm is connected to the negative electrode of the first diode, and the positive electrode of the first diode is connected to the The negative electrode of the first power supply is connected, the positive input end of the dual-channel differential input voltage comparator is connected to the tap of the sixth resistor, one end of the sixth resistor is connected to the positive electrode of the first light-emitting diode and then connected to the positive electrode of the first power supply through the leakage signal input port, the negative electrode of the first light-emitting diode is connected to the negative electrode of the first power supply through the first resistor, the other end of the sixth resistor is connected to the negative electrode of the first power supply, the negative input end of the dual-channel differential input voltage comparator is respectively connected to one end of the fourth resistor and the fourth end of the reflective photoelectric switch, the other end of the fourth resistor is connected to the first access end of the alarm, the third end and the second end of the reflective photoelectric switch are both connected to the negative electrode of the first power supply, and the first end of the reflective photoelectric switch is connected to the first access end of the alarm through the third resistor.

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