A leakage detection device

Abstract

The application discloses a kind of liquid leakage detection devices, including liquid leakage detection module, signal processing module and alarm module, the liquid leakage detection module includes liquid leakage sensor and connecting wire, the connecting wire is accessed signal processing module, the liquid leakage sensor is ion sensor, the signal processing module includes first signal processing circuit, including sensor power supply, control circuit, output circuit and first central controller, when liquid leakage occurs, loop is formed between the electrode of ion sensor, under the action of the sensor power supply, current signal is input to control circuit, the current signal is handled after the control circuit and is output circuit output first indication signal that accesses the alarm module, the first central controller can control the action of the sensor power supply and the process signal of control circuit and output circuit are checked and judged.

Description

Technical Field

[0001] This invention relates to the field of environmental monitoring devices, and in particular to a leak detection device. Background Technology

[0002] Leak detection devices are typically installed in locations prone to leaks, such as air conditioners and water tanks, or near high-precision equipment, to promptly detect water accumulation and prevent escalation. Commonly used leak detection devices employ leak sensors or detection strips as the sensing element. The sensor head consists of sensing electrodes and an insulator separating them. When liquid leaks, it causes a short circuit between the electrodes, reducing the impedance. When the sensor's controller detects this change, it immediately issues an alarm. However, the biggest problem with electrode detection is its low sensitivity when detecting liquids with low acidity or alkalinity, such as pure water, making it difficult to trigger an alarm. Furthermore, increasing the sensitivity can lead to interference from other signals, resulting in false alarms. Summary of the Invention

[0003] The main technical problem solved by this invention is to provide a leak detection device that can improve the sensitivity of leak detection and reduce false alarms.

[0004] To solve the above-mentioned technical problems, the present invention provides a leakage detection device, comprising a leakage detection module, a signal processing module, and an alarm module. The leakage detection module includes a leakage sensor and a connecting wire. One end of the connecting wire is connected to the signal processing module, and the other end is connected to the leakage sensor, which is an ion sensor. The signal processing module includes a first signal processing circuit, which includes a sensor power supply, a control circuit, an output circuit, and a first central controller. When a leakage occurs, a loop is formed between the ion-selective electrodes of the ion sensor. Under the action of the sensor power supply, a current signal is input to the control circuit. The control circuit processes the current signal and outputs a first indication signal through the output circuit. The first indication signal is connected to the alarm module. The first central controller is connected to the sensor power supply, the control circuit, and the output circuit, and is capable of controlling the operation of the sensor power supply and checking and judging the process signals of the control circuit and the output circuit.

[0005] In a preferred embodiment of the present invention, the sensor power supply is a constant voltage power supply. The first central controller is equipped with a constant voltage check function.

[0006] In a preferred embodiment of the present invention, the signal processing module further includes a second signal processing circuit, comprising an independent control circuit, an output circuit, and a second central controller. The control circuit of the second signal processing circuit is connected to the current signal output terminal of the leakage sensor, and can output a second indication signal in parallel. The second indication signal is also connected to the alarm module. The second central controller is simultaneously connected to the sensor power supply, the control circuit, and the output circuit, and can check the output voltage and determine the output voltage of the sensor drive circuit and the process signals of the control circuit and the output circuit. The first central controller and the second central controller are connected and cross-check each other. The first indication signal and the second indication signal are compared before being connected to the alarm module, and mild signals are removed.

[0007] The beneficial effects of this invention are: This invention uses an ion sensor instead of a commonly used leak sensor. In actual use, different types of electrodes can be selected according to different usage environments, so that the electrodes have the screening and passing performance of specific ions. This can effectively reduce the influence of interference signals. After improving the detection accuracy, it can effectively improve the sensitivity of the entire leak detection device and reduce false alarms. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the control structure of a preferred embodiment of the present invention; Detailed Implementation

[0009] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0010] Please see Figure 1 The embodiments of the present invention include:

[0011] A leakage detection device includes a leakage detection module, a signal processing module, and an alarm module. The leakage detection module includes a leakage sensor and connecting wires. One end of the connecting wire is connected to the signal processing module, and the other end is connected to the leakage sensor, which is an ion sensor. The signal processing module includes two signal processing circuits: a first signal processing circuit and a second signal processing circuit. The first signal processing circuit includes a sensor power supply, a control circuit, an output circuit, and a first central controller. When a leakage occurs, a loop is formed between the ion-selective electrodes of the ion sensor. Under the action of the sensor power supply, a current signal is input to the control circuit. The control circuit processes the current signal and outputs a first indication signal through the output circuit. The first indication signal is connected to the alarm module. The first central controller is connected to the sensor power supply, the control circuit, and the output circuit, and can control the operation of the sensor power supply and check and judge the process signals of the control circuit and the output circuit. The sensor power supply is a constant voltage power supply, and the first central controller has a constant voltage check function. Under a constant voltage, the leakage status can be directly obtained based on the current intensity output by the ion sensor. Therefore, to prevent data distortion, when the ion sensor emits a current signal, the first central controller checks the pressure of the constant voltage element of the sensor power supply and the normality of the control and output circuits according to the clock frequency to prevent false alarms. The second signal processing circuit includes an independent control circuit, output circuit, and second central controller. The control circuit of the second signal processing circuit is connected to the current signal output terminal of the leakage sensor and can output a second indication signal in parallel. This second indication signal is also connected to the alarm module. The second central controller is simultaneously connected to the sensor power supply, control circuit, and output circuit to check the output voltage and to check and determine the process signals of the control and output circuits. The first and second central controllers are connected and cross-check each other. The second signal output circuit is a parallel circuit to the first signal output circuit. Through cross-checking and comparing the second and first signal output circuits, the determinism of the signal can be improved, preventing signal distortion or loss.

[0012] In addition, the first indication signal and the second indication signal are compared before being connected to the alarm module, and a slight signal is removed. The reason for this setting is that under normal circumstances, the two indication signals output after cross-checking should be the same. However, in some special cases, such as when the CPU has a problem or the circuit output has a problem, the final signal may be offset. When connecting to the alarm module, removing the slight signal may cause a false alarm, but it can prevent the signal from being lost and missed, which could lead to an increase in losses.

[0013] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A leakage detection device, characterized in that, The leakage detection device includes a leakage detection module, a signal processing module, and an alarm module. The leakage detection module includes a leakage sensor and connecting wires. One end of the connecting wire is connected to the signal processing module, and the other end is connected to the leakage sensor, which is an ion sensor. The signal processing module includes a first signal processing circuit, which comprises a sensor power supply, a control circuit, an output circuit, and a first central controller. When a leakage occurs, a loop is formed between the ion-selective electrodes of the ion sensor. Under the action of the sensor power supply, a current signal is input to the control circuit. The control circuit processes the current signal and outputs a first indication signal through the output circuit. The first indication signal is connected to the alarm module. The first central controller is connected to the sensor power supply, control circuit, and output circuit, and can control the operation of the sensor power supply and check and judge the process signals of the control circuit and output circuit. The signal processing module is also equipped with a second signal processing circuit, including an independent control circuit, output circuit, and second central controller. The control circuit of the second signal processing circuit is connected to the current signal output terminal of the leakage sensor and can output a second indication signal in parallel. The second indication signal is also connected to the alarm module. The second central controller is simultaneously connected to the sensor power supply, control circuit, and output circuit, and can check the output voltage and check and judge the output voltage of the sensor drive circuit and the process signals of the control circuit and output circuit.

2. The leakage detection device according to claim 1, characterized in that, The sensor is powered by a constant voltage power supply.

3. The leakage detection device according to claim 2, characterized in that, The first central controller is equipped with a constant pressure check function.

4. The leakage detection device according to claim 1, characterized in that, The first central controller and the second central controller are connected and cross-check each other.

5. The leakage detection device according to claim 1, characterized in that, Before the first indication signal and the second indication signal are connected to the alarm module, they are compared and mild signals are eliminated.

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