A solar-powered ultrasonic rodent-repellent method for desertification control

Abstract

The present invention belongs to the field of ultrasonic insect repellent, and discloses a solar-powered sand-growing seedling ultrasonic rodent repellent method in desert management, wherein the device used in the method is composed of a solar panel, a power controller, a battery, a signal processor, a power amplifier, a flexible transducer array, and an infrared sensor. The present invention wraps the near-ground trunk of the sand-growing seedling with a flexible transducer array to generate an omnidirectional sound field, realizes 360° horizontal rodent repellent without dead angles, and can continuously repel rodents for a long time by being powered by solar energy and a battery. The rodent repellent sound waves can be switched regularly to avoid the rodents from developing adaptability, and basically no maintenance is required before the equipment breaks down. The method is easy to use, and is a purely physical rodent repellent device that will not cause poisoning to humans, livestock, and other wild animals and damage the ecology.

Description

Technical Field

[0001] The invention belongs to the field of ultrasonic insect repellent, and in particular relates to a solar-powered sand-growing tree seedling ultrasonic rodent repellent method in desert management. Background Art

[0002] At present, sand-dwelling tree seedlings can reduce the evaporation of ground water, reduce the degree of aridity in the desert, reduce the amount of floating sand in the desert, and improve the living environment of desert plants. Their normal growth plays a very important role in desert control. The biggest threat to the growth of sand-dwelling tree seedlings is mainly rodent damage. They gnaw on the bark, bite off branches, and bite off roots, posing a serious threat to the survival of sand-dwelling tree seedlings.

[0003] At present, the main means of controlling rodent infestation in desert seedlings are mousetrap and chemical control. Mousetrap is to place mousetraps at the holes of desert rodents such as gerbils. Rats will bypass the holes with mousetraps and choose other holes to move around. Therefore, the effect of manual control or mechanical control is very limited and consumes a lot of manpower. For a long time, chemical control has been the main means of controlling desert rodent infestation. Although the effect is immediate in the short term, due to the toxicity of chemical agents, it is easy to cause poisoning of humans, livestock and other wild animals when used, seriously destroying the ecological balance, and it is not suitable as a fundamental solution to desert rodent infestation control.

[0004] Ultrasonic rodent repellent is a physical control method that uses ultrasound to cause physiological and psychological discomfort to desert rodents such as gerbils, stimulate rodents to feel threatened and uneasy, create an environment where rodents cannot survive, and force rodents to migrate automatically and stay away from protected desert seedlings. At present, ultrasonic rodent repellent devices often use rigid transducers to emit ultrasonic waves to a fixed area. Due to the strong directionality of ultrasonic waves, their effective sound field is a limited area. It is difficult to prevent rodents from approaching desert seedlings outside this area, and the protective effect has blind spots. To achieve all-round spatial coverage, it is required to deploy multiple ultrasonic rodent repellent devices in multiple directions at the same time. The use process is cumbersome, the equipment cost is high, and a large amount of manpower is required to deploy and maintain it, which directly leads to the practical problem that there is a great difficulty in actual application.

[0005] Through the above analysis, the problems and defects of the prior art are as follows:

[0006] Traditional ultrasonic rat repellent devices can only effectively repel rats in a local area due to the directional propagation of ultrasonic waves. To achieve all-round rat repellence, it can only be achieved by deploying multiple ultrasonic rat repellent devices in multiple directions. The use process is cumbersome, the equipment cost is high, and a large amount of manpower is required for deployment and maintenance, which directly leads to the practical problem that there is great difficulty in actual application. Summary of the invention

[0007] In view of the problems existing in the prior art, the present invention provides a solar-powered sand-growing tree seedling ultrasonic rodent repelling method for desertification management.

[0008] The present invention is achieved by using a solar-powered ultrasonic rodent-repellent method for desertification control. The device used in the method includes:

[0009] Solar panels, which convert sunlight into electricity;

[0010] A power controller, used for controlling the solar panel to charge the storage battery, and controlling the storage battery to discharge to provide electric energy to the solar ultrasonic rodent repellent device for sand-growing seedlings;

[0011] The battery is used to store electric energy and provide electric energy for the solar-powered ultrasonic rodent-repellent device for sand-growing seedlings;

[0012] Infrared sensor, used to detect whether there are creatures approaching the protected sand-growing seedlings and output corresponding electrical signals;

[0013] A signal processor, used to control the output of ultrasonic waveforms, regularly change the mouse-repelling waveforms, switch the working mode of the device, and output ultrasonic frequency band electrical signals to the power amplifier;

[0014] A power amplifier is used to amplify the power of the ultrasonic frequency band electrical signal.

[0015] The flexible transducer array is used to convert the ultrasonic frequency band electrical signal output by the power amplifier into an ultrasonic signal and emit it outward to form an ultrasonic field.

[0016] Furthermore, the signal processor is one of a signal processor (DSP), an embedded system (ARM) or a field programmable gate array (FPGA); the frequency band range of the ultrasonic frequency band electrical signal is 20 to 55 kHz, and the waveform is a fixed frequency waveform or a swept frequency waveform, and the fixed frequency waveform and the swept frequency waveform are provided by waveform samples pre-stored in the signal processor, or generated by a waveform generation function.

[0017] Furthermore, the rat-repelling waveforms that are regularly replaced by the signal processor are obtained by randomly extracting waveform samples from a pre-stored waveform library or generating them randomly, and no repeated waveforms are used within one month.

[0018] Further, the working modes of the solar energy desert sapling ultrasonic rat repellent device include a normal mode and a strong sound mode. When in the normal mode, the signal processor outputs ultrasonic waves at a rated power, and the infrared sensor outputs an electrical signal to the signal processor. When the intensity of the electrical signal exceeds the strong sound mode switching threshold, the signal processor switches the working mode of the device from the normal mode to the strong sound mode and outputs ultrasonic waves at the maximum power. When the electrical signal output by the infrared sensor is less than the strong sound mode switching threshold, the control device switches back to the normal mode, and the working duration of the strong sound mode does not exceed 1 / 3 of the safe time of the device's maximum power output.

[0019] Further, the flexible transducer array is composed of a flexible substrate, a plurality of transducer units, connecting wires, and a connector, and is fixed to the trunk of the desert sapling by means of cable ties or ropes;

[0020] The flexible substrate is made of an insulating material with waterproof ability;

[0021] The plurality of transducer units are made of lead zirconate titanate piezoelectric ceramics (PZT) or polyvinylidene fluoride (PVDF) film materials, are circular or square, are bonded to the flexible substrate by an adhesive, and are arranged in a regular array;

[0022] The connecting wires are used to connect the transducer units to the connector;

[0023] The connector is connected to the output end of the power amplifier.

[0024] Further, the spacing between adjacent transducer units in the x direction in the flexible transducer array is dx, where d < dx ≤ 1.2d; the spacing in the y direction is dy, where dy ≤ 1.2d. Each column of transducer array elements forms a group by parallel or series connection. Among them, d represents the characteristic dimension, which is the diameter or side length of the transducer unit.

[0025] The present invention provides a method for implementing the solar energy desert sapling ultrasonic rat repellent method in desert control, and the solar energy desert sapling ultrasonic rat repellent method in desert control includes:

[0026] Initialize the solar energy desert sapling ultrasonic rat repellent device, set the replacement period of the rat repellent waveform to 3 days, and at the same time set the waveform generation method to the preset waveform method or the method of randomly generating the rat repellent waveform by calling the waveform generation function;

[0027] Infrared sensors are used to detect whether there are creatures approaching. When the electrical signal output by the infrared sensor is less than the strong sound mode switching threshold, no creature is approaching and the system enters the normal mode. When the electrical signal exceeds the strong sound mode switching threshold, a creature is approaching and the system enters the strong sound mode. The signal processor automatically calls the pre-stored mouse repelling waveform or calls the waveform generation function to randomly generate a mouse repelling ultrasonic waveform to effectively drive away mice or other creatures.

[0028] At the same time, the signal processor detects whether it has reached the waveform switching cycle. If so, it switches the waveform, otherwise it runs normally; and detects whether the stop button is pressed. If it is pressed, the program execution is terminated, and if not, it continues to detect.

[0029] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the present invention are as follows:

[0030] The present invention utilizes the flexible bending characteristic of the flexible transducer array to wrap a circle of the flexible transducer array around the trunk of the desert-dwelling seedling near the ground, thereby forming an ultrasonic sound field distributed 360 degrees around the trunk, realizing an omnidirectional mouse-repelling field in the horizontal direction within a certain height range, thereby solving the inherent defect that the rigid transducer can only form an ultrasonic mouse-repelling sound field in a limited area in front of it and cannot effectively repel mice in the area outside the sound field.

[0031] The present invention wraps the near-ground trunks of desert seedlings with a flexible transducer array to generate an omnidirectional sound field, achieving 360° horizontal rat repelling without dead angles. Powered by solar energy and batteries, it can continuously repel rats for a long time. Regular switching of rat repelling sound waves can prevent rats from developing adaptability. Basically, no maintenance is required before the equipment breaks down, and it is easy to use. It is a purely physical rat repelling device that will not cause poisoning to humans, livestock and other wild animals and damage the ecology.

[0032] The expected benefits and commercial value after the transformation of the technical solution of the present invention are as follows: the solar-powered ultrasonic rodent repellent method for desertification control disclosed by the present invention adopts a flexible transducer array to effectively solve the technical problems of traditional devices, and utilizes a flexible transducer array to achieve all-round rodent repellent without dead ends, which provides a new idea for desertification control and has certain practical value and commercial value.

[0033] The present invention provides a solar-powered ultrasonic rodent repelling method for desert-dwelling seedlings in desert control, so as to solve the problem that traditional ultrasonic rodent repelling devices can only effectively repel rodents in a local area due to the directional propagation of ultrasonic waves. To achieve all-round rodent repelling, multiple ultrasonic rodent repelling devices can only be deployed in multiple directions. The use process is cumbersome, the equipment cost is high, and a large amount of manpower is required for deployment and maintenance, which directly leads to the practical problem that there is great difficulty in actual application. The present invention provides an effective technical means for effectively repelling rodents in desert control and ensuring the normal growth of desert-dwelling seedlings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 : is a system diagram of a solar-powered ultrasonic rodent-repellent method for desertification control provided by an embodiment of the present invention;

[0035] Figure 2 is a structural diagram of a flexible transducer array provided by an embodiment of the present invention;

[0036] Figure 3 is a structural diagram of a flexible transducer array using strip-shaped units provided in an embodiment of the present invention;

[0037] Figure 4 is a processing flow chart of a signal processor provided by an embodiment of the present invention;

[0038] In the figure: 1. Solar panel; 2. Power controller; 3. Battery; 4. Signal processor; 5. Power amplifier; 6. Flexible transducer array; 601. Flexible substrate; 602. Transducer unit; 603. Connecting wire; 604. Connector; 7. Infrared sensor. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] In order to enable those skilled in the art to fully understand how to implement the present invention in detail, this section is an explanatory embodiment that expands and describes the technical solution of the claims.

[0041] like Figure 1 As shown, the solar-powered ultrasonic rodent-repellent method for desertification treatment provided by the embodiment of the present invention comprises a solar panel 1, a power controller 2, a battery 3, a signal processor 4, a power amplifier 5, a flexible transducer array 6 and an infrared sensor 7.

[0042] The solar panel 1 is used to convert solar energy into electrical energy, and under the control of the power controller 2, the electrical energy is transmitted to the storage battery 3 for storage.

[0043] The power controller 2 controls the storage battery 3 to supply power to the signal processor 4 and the power amplifier 5 .

[0044] The signal processor 4 is implemented by a signal processing device such as a signal processor (DSP), an embedded system (ARM) or a field programmable gate array (FPGA), and generates an ultrasonic frequency band electrical signal in the range of 20 to 55 kHz. The waveform of the electrical signal is a square wave, a sine wave, a triangle wave or other regular waveform with a fixed frequency, or a swept frequency waveform of one or more combinations of such waveforms in a certain frequency band in the range of 20 to 55 kHz. The fixed frequency waveform and the swept frequency waveform are provided by waveform samples pre-stored in the signal processor 4, or are generated in real time by a waveform generation function.

[0045] The signal processor 4 periodically changes the mouse-repelling ultrasonic waveform. The replaced ultrasonic waveform is generated by randomly extracting waveform samples from a pre-stored waveform library, or by a waveform generation function using random parameters such as frequency, amplitude, and basic waveform type, and must be different from the replaced waveform. Each time the waveform is changed, the used waveform record is retrieved to ensure that the repeated waveform is not used within 1 month.

[0046] The signal processor 4 controls the working mode of the solar ultrasonic rodent repellent device for desert seedlings at the same time. It usually works in the normal mode. In this working mode, the system outputs ultrasonic waves at rated power. The infrared sensor 7 detects whether there are creatures approaching the protected desert seedlings through the infrared signals generated by the creatures, and outputs the corresponding electrical signal to the signal processor 4. When the intensity of the electrical signal exceeds the intensity of the infrared sensor output electrical signal generated by a typical large gerbil at 0.5m close to the infrared sensor (i.e., the strong sound mode switching threshold), the signal processor 4 switches the working mode of the system from the normal mode to the strong sound mode, and outputs ultrasonic waves at the maximum power of the system, and switches the strong sound mode to the normal mode when the infrared sensor detection signal is less than the strong sound mode switching threshold. Generally, the working time of the strong sound mode does not exceed 1 / 3 of the maximum power output safety time of the system. The signal processor 4 controls the operation of the solar ultrasonic rodent repellent device for desert seedlings by controlling the output waveform, regularly changing the rodent repelling waveform, and switching the working mode, and determines its current working mode, and outputs the current rodent repelling electrical signal to the power amplifier 5.

[0047] The power amplifier 5 is mainly composed of a class D, class E or class T power amplifier to ensure that the power amplifier has high efficiency. After the power amplifier 5 amplifies the ultrasonic frequency band mouse-repelling waveform sent by the signal processor 4, it drives the flexible transducer array 6 to generate ultrasonic waves corresponding to the ultrasonic frequency band mouse-repelling waveform and emits it into the air.

[0048] When in use, the flexible transducer array 6 is generally wrapped around the trunk of a desert-dwelling sapling and fixed to the trunk of the desert-dwelling sapling by means of cable ties, ropes, etc., so that an omnidirectional ultrasonic sound field within a 360° range around the trunk can be generated, and rats or other creatures in this sound field area can be effectively driven away.

[0049] The structure of the flexible transducer array 6 is as follows Figure 2 shown. The flexible transducer array 6 is composed of a flexible substrate 601, transducer units 602, connection wires 603, and a connector 604. The flexible substrate 601 is made of an insulating material with waterproof ability, such as rubber. The transducer units 602 are made of materials with piezoelectric effects, such as lead zirconate titanate piezoelectric ceramics (PZT) or polyvinylidene fluoride (PVDF) films, and are bonded to the flexible substrate 601 by an adhesive and arranged on the flexible substrate 601 in a regular array. The distance between two adjacent transducer array elements 602 in the x-direction is dx, and the distance in the y-direction is dy. The transducer units 602 adopt regular shapes such as squares and circles, and the characteristic dimension is represented by the diameter of the circle or the side length of the square, denoted as d. The distance dx between adjacent transducer units 602 cannot be too large, and it is necessary to ensure that d < dx ≤ 1.2d. In the y-direction, the distance dy between adjacent transducer units 602 ≤ 1.2d, that is, the array elements in the y-direction can be connected together to form a strip array structure in this direction. In the y-direction, each column of transducer array elements forms a group by parallel or series connection, and each group of transducers is connected to the connector 604 through the connection wire 603. The connector 604 is connected to the output end of the power amplifier 5.

[0050] The structure of the flexible transducer array using strip units is as follows Figure 3 shown. In this structure, the transducer array elements are no longer circular or square structures, but conditional structures. When using hard transducer materials such as PZT, this type of flexible transducer array can only be curled around the trunk of the desert-growing sapling along the x-direction.

[0051] To prove the creativity and technical value of the technical solution of the present invention, this part is an application embodiment of the technical solution of the claim on a specific product or related technology.

[0052] The present invention also provides a method for ultrasonic rodent repelling of solar desert-growing saplings in the desert control, and the specific process is as follows Figure 4 shown:

[0053] When the solar ultrasonic mouse repellent device for sand-growing saplings is turned on, the system is first initialized. The initialization can set the mouse repellent waveform replacement cycle, which is generally set to 3 days. It can also be customized according to user needs and can be set by the signal processing system input. At the same time, the waveform generation mode is set to a preset waveform mode or a waveform generation function is called to randomly generate a mouse repellent waveform mode. Next, the biological approach detection is performed. When the infrared sensor input signal is less than the strong sound switching threshold, it enters the normal working mode. When it exceeds the threshold, it enters the strong sound mode. The signal processor automatically calls the pre-stored mouse repellent waveform or calls the waveform generation function to randomly generate a mouse repellent ultrasonic waveform. Then the signal processor detects whether the stop button is pressed. If it is pressed, the program execution is terminated. If it is not pressed, it returns to the program segment for detecting whether the biological approach continues to execute.

[0054] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A method for ultrasonic rodent control of solar sand-growing saplings in desert control, characterized in that, the device used in the rodent control method includes: a solar panel, which is used to convert solar energy into electrical energy; a power controller, which is used to control the solar panel to charge the storage battery, and control the storage battery to discharge to provide electrical energy for the ultrasonic rodent control device of solar sand-growing saplings; a storage battery, which is used to store electrical energy and at the same time provide electrical energy for the ultrasonic rodent control device of solar sand-growing saplings; an infrared sensor, which is used to detect whether there is a living being approaching the protected sand-growing saplings and output a corresponding electrical signal; a signal processor, which is used to control the output of ultrasonic waveforms, regularly replace the rodent control waveforms and switch the working mode of the device, and output ultrasonic frequency band electrical signals to a power amplifier; a power amplifier, which is used to amplify the power of the ultrasonic frequency band electrical signals; a flexible transducer array, which is used to convert the ultrasonic frequency band electrical signals output by the power amplifier into ultrasonic signals and emit them outward to form an ultrasonic field; the working mode of the ultrasonic rodent control device of solar sand-growing saplings includes a normal mode and a strong sound mode. When in the normal mode, the signal processor outputs ultrasonic waves at a rated power. The infrared sensor outputs an electrical signal to the signal processor. When the intensity of the electrical signal exceeds the strong sound mode switching threshold, the signal processor switches the working mode of the device from the normal mode to the strong sound mode and outputs ultrasonic waves at the maximum power. When the electrical signal output by the infrared sensor is less than the strong sound mode switching threshold, the control device switches back to the normal mode, and the working duration of the strong sound mode does not exceed 1 / 3 of the safe time of the device's maximum power output; the flexible transducer array is composed of a flexible substrate, multiple transducer units, connecting wires and connectors, and is fixed on the trunk of the sand-growing saplings by means of cable ties and ropes; the flexible substrate is made of an insulating material with waterproof ability; the multiple transducer units are made of lead zirconate titanate piezoelectric ceramics (PZT) or polyvinylidene fluoride (PVDF) film materials, are circular or square, are bonded to the flexible substrate by an adhesive, and are arranged in a regular array; the connecting wires are used to connect the transducer units to the connectors; the connectors are connected to the output end of the power amplifier; the distance between adjacent transducer units in the x direction in the flexible transducer array is dx, d < dx ≤ 1.2d; the distance between adjacent transducer units in the y direction is dy, dy ≤ 1.2d, and each column of transducer array elements forms a group by parallel or series connection; where d represents the characteristic dimension, which is the diameter or side length of the transducer unit.

2. The method for ultrasonic rodent control of solar sand-growing saplings in desert control according to claim 1, characterized in that, the signal processor is one of a signal processor DSP, an embedded system ARM or a field programmable gate array FPGA; the frequency band range of the ultrasonic frequency band electrical signals is 20~55kHz, and the waveform is a fixed frequency waveform or a swept frequency waveform. The fixed frequency waveform and the swept frequency waveform are provided by waveform samples pre-stored in the signal processor or generated by a waveform generation function.

3. The solar-powered ultrasonic rodent-repellent method for desertification control in claim 1, It is characterized in that The rat-repelling waveforms that are regularly replaced by the signal processor are obtained by randomly extracting waveform samples from a pre-stored waveform library or generating them randomly, and no repeated waveforms are used within one month.

4. The solar-powered ultrasonic rodent-repellent method for desertification control in claim 1, It is characterized in that, The solar-powered ultrasonic rodent-repellent method for desertification control comprises: Initialize the solar-powered ultrasonic rodent repellent device for sand-growing saplings, set the rodent repellent waveform replacement cycle to 3 days, and set the waveform generation mode to a preset waveform mode or call the waveform generation function to randomly generate a rodent repellent waveform mode; Infrared sensors are used to detect whether a creature is approaching. When the electrical signal output by the infrared sensor is less than the strong sound mode switching threshold, no creature is approaching and the system enters the normal mode. When the electrical signal exceeds the strong sound mode switching threshold, a creature is approaching and the system enters the strong sound mode. The signal processor automatically calls the pre-stored mouse repelling waveform or calls the waveform generation function to randomly generate a mouse repelling ultrasonic waveform to effectively drive away mice or other creatures. At the same time, the signal processor detects whether it has reached the waveform switching cycle. If so, it switches the waveform, otherwise it runs normally; and detects whether the stop button is pressed. If it is pressed, the program execution is terminated, and if not, it continues to detect.

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