Rainwater detection remote automatic power-off device

Abstract

The utility model belongs to equipment rainproof technical field relates to a rainwater detection remote automatic power-off device, including raindrop detection sensor, time delay relay U1, wireless sending module U2A, wireless receiving module U2B, control assembly, power module U3, power module U4, external power supply and portable internal power supply. Raindrop detection sensor is used for detecting raindrop, controls the action of time delay normally open contact of time delay relay U1, and the time delay normally open contact of time delay relay U1 is used for controlling the on and off of wireless sending module U2A, and wireless sending module U2A and wireless receiving module U2B realize the transmission of signal through coding pairing, and the coil of relay integrated on wireless receiving module U2B is electrified. The device can remote automatic power-off, avoids the rainfall of small or other situation interference.

Description

Technical Field

[0001] This utility model belongs to the field of equipment rain protection technology, specifically relating to a remote automatic power-off device for rain detection. Background Technology

[0002] In daily life and work, some high-power equipment placed outdoors may be exposed to rainwater, causing dangers such as water ingress and short circuits. Currently available rainwater detection devices have connection methods and control logic that are insufficient to meet the equipment's power-off protection requirements during rain.

[0003] For example, the connection between rainwater detection devices and controllers is mostly a short-distance wired connection. The controller is used to control the power off of the controlled device based on the detection results of the raindrop detection sensor. However, some rainwater detection devices are far from the control room where the controller is located. The long-distance wired control of the rainwater detection device to cut off the power of the device presents the problem of inconvenience of laying long-distance cables.

[0004] In addition, existing rainwater detection devices shut off the power as soon as they detect a water droplet, lacking a control logic for continuous rainwater detection. Utility Model Content

[0005] In order to solve at least one of the above-mentioned technical problems in the prior art, this utility model provides a rainwater detection remote automatic power-off device.

[0006] This utility model is achieved using the following technical solution: a remote automatic power-off device for rain detection, comprising a raindrop detection sensor, a time-delay relay U1, a wireless transmitting module U2A, a wireless receiving module U2B, a control component, a power supply module U3, a power supply module U4, an external power supply, and a portable internal power supply; wherein, the raindrop detection sensor, time-delay relay U1, wireless transmitting module U2A, and power supply module U3 are all installed next to the device to be controlled. The raindrop detection sensor is used to detect raindrops and controls the delayed normally open contact of the time-delay relay U1 to operate based on the detected raindrop signal. The delayed normally open contact of the time-delay relay U1 is used to control the connection and disconnection of the wireless transmitting module U2A. The external power supply, after voltage conversion by the power supply module U3, supplies power to the raindrop detection sensor and the time-delay relay U1; the portable internal power supply, wireless receiving module U2B, control component, and power supply module U4 are all... Installed in the control room, the wireless transmitting module U2A and the wireless receiving module U2B achieve wireless signal transmission through coded pairing. After receiving the signal from the wireless transmitting module U2A, the wireless receiving module U2B controls the coil of the relay integrated on it to be energized. The control components include a spring-loaded button S1, a contactor KM1, and the normally closed contact U2C of the relay integrated on the wireless receiving module U2B. The auxiliary normally open contact KM1C of the contactor KM1 and the normally closed contact U2C of the relay are connected in series and then connected in parallel with the coil of the spring-loaded button S1 and the contactor KM1 to form a control circuit. The control circuit is powered by a portable internal power supply. The portable internal power supply is powered by the wireless receiving module U2B after voltage conversion by the power supply module U4. The device under control is powered by an external power supply, and the circuit between the device under control and the external power supply is provided with the main normally open contact KM1B of the contactor KM1.

[0007] Preferably, the raindrop detection sensor includes an R20 raindrop detection board, an operational amplifier, indicator lights LED1 and LED2, and several resistors and capacitors. The resistance of the R20 raindrop detection board decreases after water is dripped onto its surface. Capacitor C1 is connected in parallel across the series circuit formed by indicator lights LED1 and resistor R1, forming a power indicator circuit. This power indicator circuit is powered by an external power supply converted by power module U3. The first end of the R20 raindrop detection board is connected to the ground terminal of the external power supply converted by power module U3. The second end of the R20 raindrop detection board is connected to pin 3 of the operational amplifier and the second end of resistor R2. The first end of resistor R2 is connected to the +5V terminal of the external power supply converted by power module U3. Pin #2 of the amplifier is connected to the sliding end of the sliding resistor RP1. The two ends of the sliding resistor RP1 are connected to the +5V terminal of the external power supply after voltage conversion by the power module U3 and the ground terminal, respectively. Pin #1 of the operational amplifier is connected to the second end of the resistor R4 and the IN- terminal of the time delay relay U1. The first end of the resistor R4 is connected to the negative terminal of the indicator LED2. The positive terminal of the indicator LED2 is connected to the +5V terminal of the external power supply after voltage conversion by the power module U3. Capacitor C2 is connected in parallel on both sides of the raindrop detection board R20. Resistor R3 is connected in parallel across the two ends of the series circuit formed by indicator LED2 and resistor R4. Pin #8 and pin #4 of the operational amplifier are connected to the +5V terminal of the external power supply after voltage conversion by the power module U3 and the ground terminal, respectively.

[0008] Preferably, the operational amplifier is an LM393. If the voltage of pin 3 of the operational amplifier is greater than the voltage of pin 2 of the operational amplifier, pin 1 of the operational amplifier outputs a high-level signal to the time-delay relay U1; if the voltage of pin 3 of the operational amplifier is less than the voltage of pin 2 of the operational amplifier, pin 1 of the operational amplifier outputs a low-level signal to the time-delay relay U1.

[0009] Correspondingly, when raindrops fall on the surface of the R20 raindrop detection board, pin 1 of the operational amplifier outputs a low-level signal to the time-delay relay U1, and indicator LED2 lights up; when there are no raindrops on the surface of the R20 raindrop detection board, pin 1 of the operational amplifier outputs a high-level signal to the time-delay relay U1, and indicator LED2 turns off.

[0010] Preferably, the VCC and GND terminals of the time-delay relay U1 are respectively connected to the +5V terminal of the external power supply after voltage conversion by the power module U3 and the ground terminal; the IN+ and IN- terminals of the time-delay relay U1 are respectively connected to the +5V terminal of the external power supply after voltage conversion by the power module U3 and the output level signal DO of pin 1 of the operational amplifier; the COM and NO terminals of the time-delay relay U1 are respectively connected to the +5V terminal of the external power supply after voltage conversion by the power module U3 and the VCC terminal of the wireless transmitter module U2A. The GND terminal of A is connected to the GND terminal of the external power supply after voltage conversion by the power module U3. When the level signal DO is low, the coil of the time delay relay U1 is energized. After a preset time interval, the normally open delay contact of the time delay relay U1 closes, and the NO terminal of the time delay relay U1 outputs a high-level signal to the VCC terminal of the wireless transmitter module U2A, thereby controlling the wireless transmitter module U2A to be energized. When the level signal DO is high, the coil of the time delay relay U1 is de-energized, and the normally open delay contact of the time delay relay U1 remains open.

[0011] Preferably, the VCC and GND terminals of the wireless receiver module U2B are respectively connected to the +5V terminal and GND terminal of the portable internal power supply after voltage conversion by the power supply module U4. After receiving the signal from the wireless transmitter module U2A, the wireless receiver module U2B controls the relay integrated on the wireless receiver module U2B to be energized. The normally closed contact U2C of the relay is opened, thereby controlling the coil of the contactor KM1 to be de-energized. The main normally open contact KM1B of the contactor KM1 is opened, so that the controlled device is de-energized.

[0012] Preferably, the raindrop detection sensor is made of FR-04 double-sided material with a nickel-plated surface.

[0013] Preferably, the R20 raindrop detection board is model HW-028; the time delay relay U1 is model YYC-25; the wireless transmitting module U2A and the wireless receiving module U2B are model KDY1L; and the power supply module U3 and the power supply module U4 are model AC-DC5V.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This device can remotely and automatically cut off power, providing timely power protection for high-power equipment during rain to prevent short circuits and other potential hazards, thus improving equipment safety. However, after power is cut off, manual power restoration is required to avoid the risk of short circuits caused by residual water on the equipment after rain. A wireless module solves the problem of long distances between high-power equipment and the controller, and the difficulty of wired control, enabling remote control over a distance of approximately 1000 meters. A time-delay relay U1 is used to prevent interference from light rainfall or other conditions. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a circuit diagram of the raindrop detection sensor in this embodiment;

[0018] Figure 2 This is a circuit diagram showing the connection between the time delay relay U1 and the wireless transmission module U2A in this embodiment;

[0019] Figure 3 This is a module diagram of the wireless receiving module U2B in this embodiment;

[0020] Figure 4 This is a connection circuit diagram of the control component in this embodiment;

[0021] Figure 5 This is a circuit diagram showing the connection between the external power supply and the controlled device in this embodiment;

[0022] Figure 6 This is a module diagram of the power module U3 in this embodiment;

[0023] Figure 7 This is a module diagram of the power module U4 in this embodiment. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should fall within the scope of the technical content disclosed in this utility model. It should be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0026] This utility model provides an embodiment:

[0027] A rainwater detection remote automatic power-off device includes a raindrop detection sensor, a time delay relay U1, a wireless transmission module U2A, a wireless receiving module U2B, a control component, a power supply module U3, a power supply module U4, an external power supply, and a portable internal power supply.

[0028] Among them, the raindrop detection sensor, the time delay relay U1, the wireless transmission module U2A and the power module U3 are all installed next to the device to be controlled. The raindrop detection sensor is used to detect raindrops and control the delayed normally open contact of the time delay relay U1 to operate based on the detected raindrop signal. The delayed normally open contact of the time delay relay U1 is used to control the connection and disconnection of the wireless transmission module U2A. The external power supply is used to power the raindrop detection sensor and the time delay relay U1 after voltage conversion by the power module U3.

[0029] The portable internal power supply, wireless receiver module U2B, control components, and power module U4 are all installed in the control room. The wireless transmitter module U2A and the wireless receiver module U2B achieve wireless signal transmission through coded pairing. After receiving the signal from the wireless transmitter module U2A, the wireless receiver module U2B controls the coil of the relay integrated on it to be energized. The control components include a spring-loaded button S1, a contactor KM1, and the normally closed contact U2C of the relay integrated on the wireless receiver module U2B. The auxiliary normally open contact KM1C of the contactor KM1 and the normally closed contact U2C of the relay are connected in series and then connected in parallel with the coil of the spring-loaded button S1 and the contactor KM1 to form a control circuit. The control circuit is powered by the portable internal power supply. The portable internal power supply is powered by the wireless receiver module U2B after voltage conversion by the power module U4. The device under control is powered by an external power supply, and the circuit between the device under control and the external power supply is provided with the main normally open contact KM1B of the contactor KM1.

[0030] In this embodiment, the raindrop detection sensor includes an R20 raindrop detection board, an operational amplifier, indicator lights LED1 and LED2, and several resistors and capacitors. The resistance of the R20 raindrop detection board decreases after water is dripped onto its surface. Capacitor C1 is connected in parallel across the series circuit formed by indicator lights LED1 and resistor R1, forming a power indicator circuit. This power indicator circuit is powered by an external power supply converted by power module U3. The first end of the R20 raindrop detection board is connected to the ground terminal of the external power supply converted by power module U3. The second end of the R20 raindrop detection board is connected to pin 3 of the operational amplifier and the second end of resistor R2. The first end of resistor R2 is connected to the +5V terminal of the external power supply converted by power module U3. The amplifier's pin #2 is connected to the sliding end of the sliding resistor RP1. The two ends of the sliding resistor RP1 are connected to the +5V terminal of the external power supply after voltage conversion by the power module U3 and the ground terminal, respectively. The operational amplifier's pin #1 is connected to the second end of the resistor R4 and the IN- terminal of the time delay relay U1. The first end of the resistor R4 is connected to the negative terminal of the indicator LED2. The positive terminal of the indicator LED2 is connected to the +5V terminal of the external power supply after voltage conversion by the power module U3. Capacitor C2 is connected in parallel on both sides of the raindrop detection board R20. Resistor R3 is connected in parallel across the two ends of the series circuit formed by indicator LED2 and resistor R4. The operational amplifier's pins #8 and #4 are connected to the +5V terminal of the external power supply after voltage conversion by the power module U3 and the ground terminal, respectively.

[0031] Specifically, the raindrop detection sensor is made of FR-04 double-sided material with a nickel-plated surface, which has the advantages of oxidation resistance, strong conductivity, and long service life.

[0032] The operational amplifier is an LM393. The LM393 is chosen because it provides a clean output signal, good waveform, and strong driving capability (over 15mA). If the voltage at pin 3 of the operational amplifier is greater than the voltage at pin 2, pin 1 outputs a high-level signal to the time-delay relay U1; if the voltage at pin 3 is less than the voltage at pin 2, pin 1 outputs a low-level signal to the time-delay relay U1. Correspondingly, when raindrops fall on the surface of the R20 raindrop detection board, pin 1 outputs a low-level signal to the time-delay relay U1, and indicator LED2 lights up; when there are no raindrops on the surface of the R20 raindrop detection board, pin 1 outputs a high-level signal to the time-delay relay U1, and indicator LED2 turns off.

[0033] The VCC and GND terminals of the time-delay relay U1 are connected to the +5V terminal of the external power supply (after voltage conversion by the power module U3) and the ground terminal, respectively. The IN+ and IN- terminals of the time-delay relay U1 are connected to the +5V terminal of the external power supply (after voltage conversion by the power module U3) and the DO output level signal from pin 1 of the operational amplifier, respectively. The COM and NO terminals of the time-delay relay U1 are connected to the +5V terminal of the external power supply (after voltage conversion by the power module U3) and the VCC terminal of the wireless transmitter module U2A, respectively. The GND terminal of the wireless transmitter module U2A is connected to the GND terminal of the external power supply (after voltage conversion by the power module U3). When the DO level signal is low, the coil of the time-delay relay U1 is energized, and after a preset time interval (only when the raindrop detection delay reaches 5), the coil is energized. The time delay relay U1 operates only after a certain number of seconds (adjustable), and features voltage suppression protection, surge protection, and simple adjustment. When the normally open contact of the time delay relay U1 closes, the NO terminal of the time delay relay U1 outputs a high-level signal to the VCC terminal of the wireless transmitter module U2A, thereby controlling the wireless transmitter module U2A to power on and operate. When the level signal DO is high, the coil of the time delay relay U1 is de-energized, and the normally open contact of the time delay relay U1 remains open.

[0034] The wireless module uses a 315MHz encoder controller for remote control. This device has a wide power supply range (DC3V - 12V), uses the EV1527 encoding method, and can achieve a control distance of approximately 1000 meters. It includes a transmitting module and a receiving module. The VCC and GND terminals of the wireless receiving module U2B are respectively connected to the +5V and GND terminals of the portable internal power supply after voltage conversion by the power supply module U4. After receiving a signal from the wireless transmitting module U2A, the wireless receiving module U2B energizes the relay integrated on it. The normally closed contact U2C of the relay opens, which in turn de-energizes the coil of contactor KM1. The main normally open contact KM1B of contactor KM1 opens, thus de-energizing the controlled device.

[0035] The model number of the R20 raindrop detection board is HW-028; the model number of the time delay relay U1 is YYC-25; the model numbers of the wireless transmitting module U2A and the wireless receiving module U2B are KDY1L; and the model numbers of the power supply modules U3 and U4 are AC-DC5V.

[0036] Specific working principle:

[0037] In this embodiment, the device to be controlled is a high-power LED screen;

[0038] First, press the spring-loaded button S1 to energize the coil of contactor KM1, which in turn closes the auxiliary normally open contact KM1C of contactor KM1, forming a self-locking circuit; then the main normally open contact KM1B of contactor KM1 closes, and the external power supply powers the high-power LED screen.

[0039] When it rains, and raindrops fall on the surface of the R20 raindrop detection board, the resistance of the R20 raindrop detection board decreases, the voltage difference across the R20 raindrop detection board decreases, which in turn causes the voltage input to pin 3 of the operational amplifier to decrease. The voltage at pin 3 of the operational amplifier is less than the voltage at pin 2 of the operational amplifier, and pin 1 of the operational amplifier outputs a low-level signal to the time-delay relay U, while the indicator LED2 lights up.

[0040] The NO terminal of the time-delay relay U1 outputs a high-level signal to the VCC terminal of the wireless transmitter module U2A, thereby controlling the wireless transmitter module U2A to be powered on. After receiving the signal from the wireless transmitter module U2A, the wireless receiver module U2B controls the relay integrated on the wireless receiver module U2B to be powered on. The normally closed contact U2C of the relay opens, thereby controlling the coil of the contactor KM1 to be de-energized. The main normally open contact KM1B of the contactor KM1 opens, causing the controlled device to be powered off.

[0041] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A remote automatic power-off device for rainwater detection, characterized in that: Includes a raindrop detection sensor, a time delay relay U1, a wireless transmitter module U2A, a wireless receiver module U2B, a control component, a power supply module U3, a power supply module U4, an external power supply, and a portable internal power supply; Among them, the raindrop detection sensor, the time delay relay U1, the wireless transmission module U2A and the power module U3 are all installed next to the device to be controlled. The raindrop detection sensor is used to detect raindrops and control the delayed normally open contact of the time delay relay U1 to operate based on the detected raindrop signal. The delayed normally open contact of the time delay relay U1 is used to control the connection and disconnection of the wireless transmission module U2A. The external power supply is used to power the raindrop detection sensor and the time delay relay U1 after voltage conversion by the power module U3. The portable internal power supply, wireless receiver module U2B, control components, and power module U4 are all installed in the control room. The wireless transmitter module U2A and the wireless receiver module U2B achieve wireless signal transmission through coded pairing. After receiving the signal from the wireless transmitter module U2A, the wireless receiver module U2B controls the coil of the relay integrated on it to be energized. The control components include a spring-loaded button S1, a contactor KM1, and the normally closed contact U2C of the relay integrated on the wireless receiver module U2B. The auxiliary normally open contact KM1C of the contactor KM1 and the normally closed contact U2C of the relay are connected in series and then connected in parallel with the coil of the spring-loaded button S1 and the contactor KM1 to form a control circuit. The control circuit is powered by the portable internal power supply. The portable internal power supply is powered by the wireless receiver module U2B after voltage conversion by the power module U4. The device under control is powered by an external power source, and the circuit between the device under control and the external power source is equipped with the main normally open contact KM1B of contactor KM1.

2. The rain detection remote automatic power-off device according to claim 1, wherein: The raindrop detection sensor includes an R20 raindrop detection board, an operational amplifier, indicator LED1, indicator LED2, and several resistors and capacitors. The resistance of the R20 raindrop detection board decreases after water is dripped onto its surface. Capacitor C1 is connected in parallel across the series circuit consisting of indicator LED1 and resistor R1 to form a power indicator circuit. The power indicator circuit is powered by an external power source after voltage conversion by power module U3. The first end of the R20 raindrop detection board is connected to the ground terminal of the external power supply after voltage conversion by power module U3. The second end of the R20 raindrop detection board is connected to pin 3 of the operational amplifier and the second end of resistor R2. The first end of resistor R2 is connected to the +5V terminal of the external power supply after voltage conversion by power module U3. Pin 2 of the operational amplifier is connected to the sliding end of sliding resistor RP1. The two ends of sliding resistor RP1 are connected to the +5V terminal of the external power supply after voltage conversion by power module U3 and the ground terminal, respectively. Pin 1 of the operational amplifier is connected to the second end of resistor R4 and the IN- terminal of time delay relay U1. The first end of resistor R4 is connected to the negative terminal of indicator LED2. The positive terminal of indicator LED2 is connected to the +5V terminal of the external power supply after voltage conversion by power module U3. Capacitor C2 is connected in parallel on both sides of the R20 raindrop detection board. Resistor R3 is connected in parallel across the two ends of the series circuit formed by indicator LED2 and resistor R4. Pins 8 and 4 of the operational amplifier are connected to the +5V terminal of the external power supply after voltage conversion by power module U3 and the ground terminal, respectively.

3. The rain detection remote automatic power cut-off device according to claim 2, wherein: The operational amplifier is model LM393. If the voltage of pin 3 of the operational amplifier is greater than the voltage of pin 2 of the operational amplifier, pin 1 of the operational amplifier outputs a high-level signal to the time-delay relay U1; if the voltage of pin 3 of the operational amplifier is less than the voltage of pin 2 of the operational amplifier, pin 1 of the operational amplifier outputs a low-level signal to the time-delay relay U1. Correspondingly, when raindrops fall on the surface of the R20 raindrop detection board, pin 1 of the operational amplifier outputs a low-level signal to the time-delay relay U1, and indicator LED2 lights up; when there are no raindrops on the surface of the R20 raindrop detection board, pin 1 of the operational amplifier outputs a high-level signal to the time-delay relay U1, and indicator LED2 turns off.

4. The rain detection remote automatic power-off device according to claim 3, wherein: The VCC and GND terminals of the time delay relay U1 are respectively connected to the +5V terminal of the external power supply after voltage conversion by the power module U3 and the ground terminal. The IN+ and IN- terminals of the time delay relay U1 are respectively connected to the +5V terminal of the external power supply after voltage conversion by the power module U3 and the output level signal DO of pin 1 of the operational amplifier. The COM and NO terminals of the time delay relay U1 are respectively connected to the +5V terminal of the external power supply after voltage conversion by the power module U3 and the VCC terminal of the wireless transmitter module U2A. The GND terminal is connected to the GND terminal of the external power supply after voltage conversion by the power module U3. When the level signal DO is low, the coil of the time delay relay U1 is energized. After a preset interval, the normally open delay contact of the time delay relay U1 closes, and the NO terminal of the time delay relay U1 outputs a high-level signal to the VCC terminal of the wireless transmitter module U2A, thereby controlling the wireless transmitter module U2A to be energized. When the level signal DO is high, the coil of the time delay relay U1 is de-energized, and the normally open delay contact of the time delay relay U1 remains open.

5. The rain detection remote automatic power cut-off device according to claim 4, wherein: The VCC and GND terminals of the wireless receiver module U2B are respectively connected to the +5V terminal and GND terminal of the portable internal power supply after voltage conversion by the power supply module U4. After receiving the signal from the wireless transmitter module U2A, the wireless receiver module U2B controls the relay integrated on the wireless receiver module U2B to be energized. The normally closed contact U2C of the relay opens, thereby controlling the coil of the contactor KM1 to be de-energized. The main normally open contact KM1B of the contactor KM1 opens, causing the controlled device to be de-energized.

6. The rain detection remote automatic power disconnect device of claim 1, wherein: The raindrop detection sensor is made of FR-04 double-sided material with a nickel-plated surface.

7. The rain detection remote automatic power disconnect device of claim 2, wherein: The model number of the R20 raindrop detection board is HW-028; the model number of the time delay relay U1 is YYC-25; the model numbers of the wireless transmitting module U2A and the wireless receiving module U2B are KDY1L; and the model numbers of the power supply modules U3 and U4 are AC-DC5V.

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