Flexible sensor and water leakage detection system

Abstract

The utility model provides a flexible sensor and a water leakage detection system. The flexible sensor comprises a base material, an electrode group and a lead group. The base material is a strip-shaped FPC, the electrode sets are arranged on the upper surface of the base material in the longitudinal direction of the base material, and a gap is formed between every two adjacent electrode sets. Each electrode group comprises two separated electrode strips; the wire groups are arranged in the base material and are in one-to-one correspondence with the electrode groups; each wire group comprises a positive end wire and a grounding end wire, and one end of the positive end wire and one end of the grounding end wire in the same group are electrically connected with the electrode strips in the same group respectively. Water drips between the electrode strips in the same group, potential change collected by the ADC of the detection circuit is caused, and a user can know that the laying position of the electrode group leaks water. The terminals formed by the wire groups corresponding to the different electrode groups are distinguished and monitored through the detection circuit end, so that when water leakage occurs, a water leakage area and a water leakage range can be accurately positioned, and great convenience is brought to maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of water leakage detection, in particular to a flexible sensor and a water leakage detection system. Background Art

[0002] In the field of refrigeration equipment, freezers are important equipment for storing food, medicines and other items, and have extremely high requirements for the stability and safety of their operation. With the continuous development of technology, the intelligence and automation level of freezers are also constantly improving, and various intelligent monitoring systems have emerged. However, in the actual operation of freezers, water leakage is still a difficult problem that is difficult to completely solve.

[0003] At present, although the refrigerator guard system on the market has the function of water leakage detection, its detection accuracy and positioning ability are obviously insufficient. Most of the existing water leakage detection systems use sensors for detection. When the sensor detects moisture, it will trigger the alarm mechanism. However, this method can only tell the user that there is a water leakage problem, but cannot accurately tell the specific location of the water leakage. Therefore, when a water leakage occurs, users often need to do a lot of troubleshooting work, which is not only inefficient, but also may miss the best time for maintenance.

[0004] In addition, the existing water leakage detection system lacks real-time performance. Due to the limitations of detection technology, the system often cannot feedback water leakage information in real time, resulting in users being unable to know the fault situation for a long time after the water leakage problem occurs. This may not only aggravate the water leakage problem, but also cause damage to the items in the refrigerator and even cause a greater safety accident. Utility Model Content

[0005] In order to solve the above problems, the purpose of the utility model is to provide a flexible sensor and a water leakage detection system, to provide users with a refrigerator guard system that can accurately locate the leakage point and provide real-time feedback of fault information, thereby ensuring the safe operation of the refrigerator and reducing property losses and safety accidents.

[0006] The utility model is realized by the following technical solutions:

[0007] A flexible sensor, comprising:

[0008] A substrate, wherein the substrate is a strip-shaped FPC;

[0009] Electrode groups, wherein a plurality of the electrode groups are arranged on the upper surface of the substrate along the longitudinal direction of the substrate, with a gap between two adjacent electrode groups; each electrode group comprises two separated electrode strips;

[0010] A conductor group, wherein the conductor group is arranged in the substrate, and the conductor group corresponds to the electrode group one by one; each conductor group includes a positive terminal conductor and a grounding terminal conductor, one end of the positive terminal conductor and the grounding terminal conductor of the same group are respectively electrically connected to the electrode strips of the same group, and the other ends of the positive terminal conductor and the grounding terminal conductor are led out from the edge of the substrate.

[0011] Furthermore, the grounding wires of the electrode groups are connected in series to form a grounding wire.

[0012] Furthermore, the terminals are all arranged at the same end in the longitudinal direction of the substrate.

[0013] Furthermore, it also includes an adhesive layer, which is arranged on the lower surface of the substrate.

[0014] Furthermore, each of the electrode strips is arranged in the longitudinal direction of the substrate, and two electrode strips in the same group are arranged opposite to each other in the transverse direction of the substrate.

[0015] A water leakage detection system comprises the above-mentioned flexible sensor.

[0016] Furthermore, the detection system also includes a detection terminal, a gateway and a cloud platform connected in sequence; the detection terminal is connected to the flexible sensor, the detection terminal is used to transmit the water leakage signal collected by the flexible sensor to the gateway, and the gateway is used to transmit the received water leakage signal to the cloud platform.

[0017] Furthermore, the detection terminal includes a controller connected to the flexible sensor, a clock module, a power module, and a wireless transmission module connected to the controller, and the clock module and the wireless transmission module are also connected to the power module; the power module is used to supply power to the controller, the clock module, and the wireless transmission module, the clock module is used to periodically send a clock signal to the controller, the controller is used to periodically control the flexible sensor to collect water leakage signals according to the clock signal, and the wireless transmission module is used to send the collected water leakage signals to the gateway.

[0018] Furthermore, the wireless transmission module includes a LoRa module.

[0019] Furthermore, the gateway includes a microprocessor connected to the detection terminal, a communication module connected to the microprocessor, a LoRa module and a power supply module, and the power supply module is also connected to the communication module and the LoRa module respectively; the LoRa module is used to receive the water leakage signal of the detection terminal and transmit it to the microprocessor, and the microprocessor processes the water leakage signal and sends it to the cloud platform through the communication module.

[0020] Compared with the prior art, the technical solution of the utility model and its beneficial effects are as follows:

[0021] (1) Water drips on the water leakage detection position between the electrode strips of the same group of the utility model, and the conductive property of water is used to make the electrode strips of the same group conductive, thereby causing the potential change collected by the detection circuit ADC. The user can know that the position where the electrode group is laid is leaking according to the potential change at the detection circuit end. There are several electrode groups, and the wire groups correspond to the electrode groups one by one. The terminals formed by the wire groups corresponding to different electrode groups are distinguished and monitored by the detection circuit end, so that when a water leakage occurs, the water leakage area and the water leakage range can be accurately located, which brings great convenience to maintenance.

[0022] (2) The water leakage detection system of the utility model has a detection terminal connected to a flexible sensor. The detection terminal is used to transmit the water leakage signal collected by the flexible sensor to a gateway. The gateway is used to transmit the received water leakage signal to a cloud platform, so that the staff can monitor the water leakage conditions of a large number of water leakage detection points in a timely manner through the cloud platform.

[0023] (3) In the detection terminal of the utility model, the clock module controls the controller to perform regular data collection and monitoring of water leakage. The detection terminal is in a dormant state during the rest of the time, which greatly reduces energy consumption. In addition, the LoRa technology is used for data transmission between the terminal and the gateway, which further reduces power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a top view of a flexible sensor provided in the first embodiment of the utility model;

[0025] Figure 2 This is a circuit wiring diagram of the flexible sensor provided in the first embodiment of the utility model;

[0026] Figure 3 This is a principle block diagram of a water leakage detection system provided by Embodiment 2 of the present utility model;

[0027] Figure 4 yes Figure 3 A further refinement of the principle block diagram.

[0028] Illustration Description:

[0029] Substrate-1; electrode group-2; electrode strip-3; terminal-4; water leakage detection position-5; positive terminal wire-6; grounding terminal wire-7. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0031] Embodiment 1

[0032] See also Figure 1 and Figure 2 A flexible sensor includes a substrate 1, an electrode group 2 arranged on the upper surface of the substrate, and a wire group connected to the electrode group 2. The substrate 1 is a strip-shaped FPC. The electrode group 2 includes two separated electrode strips 3, and the wire group is arranged in the substrate 1. The wire group includes a positive terminal wire 6 and a grounding terminal wire 7. One end of the positive terminal wire 6 and the grounding terminal wire 7 are electrically connected to the electrode strip 3 respectively, and the other ends of the positive terminal wire 6 and the grounding terminal wire 6 are led out to terminals 4 from the edge of the substrate 1. The two terminals 4 of the same wire group are connected to the detection circuit, and the electrode strips 3 of the same group are open circuit, that is, a water leakage detection position 5 is formed between the electrode strips 3 of the same group. When water leaks, water drips onto the water leakage detection position 5 between the electrode strips 3 of the same group. The water conductivity property is used to make the electrode strips 3 of the same group conductive, thereby causing a change in the potential collected by the detection circuit ADC. The user can obtain whether there is a water leak according to the change in the potential at the detection circuit end. More preferably, the electrode strips 3 are arranged in the longitudinal direction of the substrate 1, and two electrode strips 3 are disposed opposite to each other in the transverse direction of the substrate 1, so as to set the detectable length of the flexible sensor to the maximum.

[0033] In this embodiment, there are several electrode groups, and the wire groups correspond to the electrode groups one by one. The electrode groups are arranged on the upper surface of the substrate 1 along the longitudinal direction of the substrate 1, and have a large detection range. There is a gap between adjacent electrode groups 2, so that each electrode group has independent detection capabilities. In addition, it is not difficult to understand that the terminals formed by the wire groups corresponding to different electrode groups are distinguished and monitored by the detection circuit end, so that when a water leak occurs, the water leak area and the water leak range can be accurately located, which brings great convenience for maintenance. The terminals 4 corresponding to each electrode group are arranged at the same end of the substrate 1 in the longitudinal direction, so as to facilitate the connection of the flexible sensor with the detection circuit.

[0034] Furthermore, the grounding wires of the electrode groups are connected in series to form a 7-phase grounding wire, that is, all electrode groups share one grounding wire, which reduces the nodes and connection points in the circuit, thereby simplifying the circuit structure and improving the reliability of the circuit; saving the cost required for the wires; and reducing the resistance at the same time, which helps to improve the stability and continuity of the detection signal transmission.

[0035] The flexible sensor of this embodiment further includes an adhesive layer (not shown), which is disposed on the lower surface of the substrate 1 , so that the flexible sensor can be well adhered and fixed to the area to be detected, and is easy to operate.

[0036] Embodiment 2

[0037] See also Figure 3 and Figure 4 A water leakage detection system includes the flexible sensor of the first embodiment, and also includes a detection terminal, a gateway and a cloud platform connected in sequence. The detection terminal is connected to the flexible sensor, and the detection terminal is used to transmit the water leakage signal collected by the flexible sensor to the gateway, and the gateway is used to transmit the received water leakage signal to the cloud platform, so that the staff can timely monitor the water leakage of a large number of water leakage detection points through the cloud platform.

[0038] More specifically, the detection terminal includes a controller MCU connected to the flexible sensor, a clock module connected to the controller MCU, a power module, and a LoRa module, and the clock module and the LoRa module are also connected to the power module; the power module is used to power the controller, the clock module, and the wireless transmission module, the clock module is used to send a clock signal to the controller MCU regularly, the controller MCU is used to control the flexible sensor to collect water leakage signals according to the clock signal, and the LoRa module is used to send the collected water leakage signals to the gateway. The clock module controls the controller MCU to collect and monitor water leakage at regular intervals, and the detection terminal is in a dormant state at other times, which greatly reduces energy consumption, and uses LoRa technology to transmit data with the gateway, further reducing power consumption. In this embodiment, the controller has an ADC acquisition port to collect the potential changes caused by water leakage between the electrode groups of the flexible inductor. It can be understood that the timing of starting a system through a clock module is a common technology in the field of automatic control, which will not be repeated here.

[0039] The gateway includes a microprocessor MPU connected to the detection terminal, a communication module connected to the microprocessor, a LoRa module and a power supply module, and the power supply module is also connected to the communication module and the LoRa module respectively; the LoRa module is used to receive the water leakage signal of the detection terminal and transmit it to the microprocessor MPU, and the microprocessor MPU processes the water leakage signal and sends it to the cloud platform through the communication module. After the user processes and analyzes the water leakage signal through the cloud platform, he can quickly know the water leakage danger and the location of the water leakage. The communication module here is one or more of 4G / WIFI / network cable and LTE network. In this embodiment, the LoRa module has a baseband and can be networked with more than two hundred detection terminals, so that one gateway can collect and transmit a large number of water leakage detection points.

[0040] The above description shows and describes the preferred embodiments of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept of this article through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A flexible sensor, characterized in that: include: A substrate, wherein the substrate is a strip-shaped FPC; Electrode groups, wherein a plurality of the electrode groups are arranged on the upper surface of the substrate along the longitudinal direction of the substrate, with a gap between two adjacent electrode groups; each electrode group comprises two separated electrode strips; A conductor group, wherein the conductor group is arranged in the substrate, and the conductor group corresponds to the electrode group one by one; each conductor group includes a positive terminal conductor and a grounding terminal conductor, one end of the positive terminal conductor and the grounding terminal conductor of the same group are respectively electrically connected to the electrode strips of the same group, and the other ends of the positive terminal conductor and the grounding terminal conductor are led out from the edge of the substrate.

2. A flexible sensor according to claim 1, characterized in that: The grounding wires of the electrode groups are connected in series with a grounding wire.

3. The flexible sensor according to claim 1, characterized in that: The terminals are all arranged at the same end of the substrate in the longitudinal direction.

4. The flexible sensor according to claim 1, characterized in that: It also includes an adhesive layer, which is arranged on the lower surface of the substrate.

5. The flexible sensor according to claim 1, characterized in that: Each of the electrode strips is arranged along the longitudinal direction of the substrate, and two electrode strips in the same group are arranged opposite to each other in the transverse direction of the substrate.

6. A water leakage detection system, characterized in that: The flexible sensor comprises the flexible sensor according to any one of claims 1 to 5.

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