Ultrasonic ranging and positioning alarm device for electric power safety appliance

Abstract

The utility model discloses an ultrasonic ranging positioning alarm device for an electric power safety appliance, and relates to the technical field of electric power safety appliances. The ultrasonic ranging positioning alarm device is composed of an ultrasonic sensor module, a buzzer alarm module, a key control module and a nixie tube display module which are all communicated with a main controller module. The ultrasonic sensor module is used for measuring the distance, the key control module is used for setting the safety distance, the distance is displayed through the nixie tube display module, and when the main controller module judges that the measured distance is smaller than the set safety distance, the buzzer alarm module starts to give an alarm. The ultrasonic ranging, positioning and alarming device for the electric power safety appliance effectively solves the problems that the distance between the device and an electrified body is not clear and the position of equipment is difficult to position accurately in the hot-line work of an electric power system at present through the core functions of real-time ultrasonic ranging, positioning, safety alarming distance presetting and the like; therefore, the safety coefficient of the operating personnel is remarkably improved, and the working efficiency of hot-line work can be optimized at the same time.

Description

Technical Field

[0001] This utility model relates to the field of power safety equipment technology, and specifically to an ultrasonic ranging and positioning alarm device for power safety equipment. It is a positioning and ranging device for power safety equipment to locate its position during operation and to measure the distance to the surrounding area. Background Technology

[0002] As a core energy source, electricity consumption is growing exponentially, but the construction and operation of power infrastructure are facing unprecedented pressure. Against this backdrop, live-line working technology, with its advantages of not requiring power outages, high efficiency, and significant social benefits, has become the preferred solution for the inspection and maintenance of transmission lines.

[0003] However, the unique nature of live-line work inherently carries high safety risks. According to the State Grid Corporation's accident statistics over the past three years, accidents resulting in personal injury or death due to accidental entry into strong electric fields or insufficient safety distance account for 63.4% of all live-line work accidents. Therefore, in the field of high-voltage live-line maintenance and repair, integrating positioning devices with real-time distance visualization and adjustable alarm distances into live-line work tools is particularly important.

[0004] The working principle of an ultrasonic ranging device is as follows: First, an ultrasonic pulse is emitted, and then the pulse is waited for to be reflected back from the target object. Based on the speed of sound and the time difference, the distance from the ultrasonic emission point to the object is calculated using a formula. Therefore, this invention addresses the problems of unclear distances to energized bodies and difficulty in accurately locating equipment during live-line work in power systems by providing an ultrasonic ranging and positioning alarm device. Utility Model Content

[0005] The purpose of this invention is to propose an ultrasonic ranging and positioning alarm device for power safety equipment, which solves the problems of unclear distance to live conductors and difficulty in accurately locating equipment in current live-line work of power systems.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An ultrasonic ranging and positioning alarm device for electrical safety equipment is characterized by comprising an ultrasonic sensor module, a buzzer alarm module, a key control module, and a digital tube display module, all of which are connected to a main controller module; the ultrasonic sensor module is used to measure distance, the key control module is used to set a safe distance, and the digital tube display module displays the distance; when the main controller module determines that the measured distance is less than the set safe distance, the buzzer alarm module activates the alarm.

[0008] As a preferred technical solution of this utility model, the main controller module uses an STC89C52 microcontroller as the core control unit. When the measured distance is less than the set distance, the main control chip compares the measured value with the set value and then controls the buzzer to sound an alarm.

[0009] As a preferred embodiment of this utility model, the main controller module is equipped with a clock circuit, and XTAL1 and XTAL2 are the input and output of the inverting amplifier, respectively. The inverting amplifier is configured as an on-chip oscillator. Since one machine cycle contains 6 state cycles, and each state cycle is 2 oscillation cycles, one machine cycle has a total of 12 oscillation cycles. If the oscillation frequency of the external quartz crystal oscillator is 12MHz, one oscillation cycle is 1 / 12us, so one machine cycle is 1us.

[0010] As a preferred technical solution of this utility model, the main controller module is equipped with an automatic reset circuit. The reset method generally includes power-on automatic reset and external button manual reset. After the microcontroller clock circuit is working, it can complete the reset operation when it continuously outputs a high level for 2 machine cycles at the RESET terminal. For example, when using a crystal oscillator frequency of 12MHz, the duration of the reset signal should not be less than 2us.

[0011] As a preferred technical solution of this utility model, the buzzer alarm module uses a speaker, a transistor, and a resistor connected to the P13 pin of the microcontroller to form a sound alarm circuit.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This utility model proposes an ultrasonic ranging and positioning alarm device for electrical safety equipment. This device effectively solves the above problems through core functions such as real-time ultrasonic ranging and positioning and preset safety alarm distance, thereby significantly improving the safety factor of operators and optimizing the work efficiency of live-line work. Attached Figure Description

[0014] Figure 1 This is a system architecture diagram.

[0015] Figure 2 This is the overall design circuit diagram.

[0016] Figure 3 It is a circuit diagram of a control system.

[0017] Figure 4 It is a clock circuit diagram.

[0018] Figure 5 This is a reset circuit diagram.

[0019] Figure 6 This is a circuit diagram for an audible alarm.

[0020] Figure 7 This is a circuit diagram for a digital tube display.

[0021] Figure 8 This is a flowchart of the ultrasonic detection procedure. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings.

[0023] Example 1

[0024] Structural introduction of ultrasonic ranging and positioning alarm device:

[0025] Please see Figure 1 and 2 As shown, an ultrasonic ranging and positioning alarm device for electrical safety equipment has a circuit structure module that can be divided into: an ultrasonic sensor module, a buzzer alarm module, a main controller module, a button control module, and a 4-digit digital tube display module.

[0026] The core module of the design, the microcontroller application system, consists of hardware and software. The hardware includes a system comprised of a microcontroller, input / output devices, and peripheral application circuits, while the software is the general term for various operating programs. The development process of the microcontroller application system includes several stages such as overall design, hardware design, and software design. The system uses the STC89C52 microcontroller as the core control unit. When the measured distance is less than the set distance, the main control chip compares the measured value with the set value, processes it, and then controls the buzzer to sound an alarm.

[0027] 1. Hardware Design

[0028] The main components used are: an STC89C52 microcontroller, an ultrasonic sensor, buttons, a four-digit LED display, a buzzer, and other microcontroller peripheral circuits. The circuit uses three buttons: a setting button, an increment button, and a decrement button. Figure 3 This is the circuit diagram for the control system. VCC provides 5V power, GND is ground, TRIG is the trigger control signal input, and ECHO is the echo signal output.

[0029] 2. Power supply design

[0030] The design uses a single 14500 AA lithium battery at 4.5V for power supply.

[0031] 3. Design of the ultrasonic module

[0032] The ultrasonic module uses the HC-SR04 ultrasonic module, and its main program is as follows: Figure 8As shown. This module provides non-contact distance sensing from 2cm to 400cm, with a ranging accuracy up to 3mm. The module includes an ultrasonic transmitter, receiver, and control circuitry. Basic working principle: Ranging is triggered using the TRIG port of the I / O port, providing a high-level signal of at least 10µs; the module automatically sends eight 40kHz square waves and automatically detects if a signal is returned; if a signal is returned, a high-level signal is output through the ECHO port of the I / O port. The duration of the high-level signal is the time it takes for the ultrasonic wave to travel from transmission to return. Test distance = (high-level time * speed of sound (340m / s)) / 2.

[0033] The HC-SR04 ultrasonic detection module is used as follows: Trigger via the IO port by providing a high level of at least 10µs to the Trig port to start the measurement. The module automatically sends eight 40kHz square waves and automatically detects if a signal is returned. If a signal is returned, a high level is output through the Echo port. The duration of the high level is the time it takes for the ultrasonic wave to travel from emission to return. The test distance = (high level time * 340) / 2, in meters. The testing function in the program is mainly completed by two functions.

[0034] In the implementation, Timer 0 is used for timing measurement, with a frequency division of 8. The preset value of TCNTT0 is 0XCE. When the timer0 overflow interrupt occurs 2500 times, it will take 125ms. The calculation formula is as follows (unit: ms):

[0035] T = (Timer 0 overflow count * (0XFF - 0XCE)) / 1000

[0036] The calculation of the initial value of Timer 0 varies depending on the frequency division.

[0037] 4. Clock circuit design

[0038] like Figure 4 As shown, XTAL1 and XTAL2 are the input and output of the inverting amplifier, respectively. This inverting amplifier can be configured as an on-chip oscillator. Both crystal and ceramic oscillators can be used. If an external clock source is used to drive the device, XTAL2 should not be connected.

[0039] Since a machine cycle contains 6 state cycles, and each state cycle has 2 oscillation cycles, a machine cycle has a total of 12 oscillation cycles. If the oscillation frequency of the external quartz crystal oscillator is 12MHz, and one oscillation cycle is 1 / 12µs, then one machine cycle is 1µs.

[0040] 5. Design of the reset circuit

[0041] like Figure 5As shown, an automatic reset circuit is used. Reset methods generally include power-on automatic reset and external button manual reset. After the microcontroller's clock circuit is operational, the reset operation is completed by continuously providing a high level for two machine cycles at the RESET pin. For example, when using a 12MHz crystal oscillator, the reset signal duration should be no less than 2µs.

[0042] 6. Design of the sound alarm circuit

[0043] like Figure 6 As shown, a speaker, a transistor, and a resistor are connected to the P13 pin of the microcontroller to form a sound alarm circuit.

[0044] 7. Display Module Design

[0045] The display module uses a digital tube display interface circuit, such as Figure 7 As shown.

[0046] The ultrasonic ranging and positioning alarm device for electrical safety equipment proposed in this utility model operates as follows:

[0047] (1) System initialization;

[0048] (2) The ultrasonic ranging device starts measuring distance. If the measured distance is compared with the set value, and the measured distance is less than the set value, the alarm circuit is activated and the alarm is triggered.

[0049] (3) Continuously compare the distance to determine whether the alarm continues. If there is no change, the alarm ends. If the measured distance is less than the set value and the difference is increasing, the alarm continues and the alarm sound is urgent.

[0050] (4) The system is reset and waiting to be tested again.

[0051] Example 2

[0052] Specific applications:

[0053] The ultrasonic ranging and positioning alarm device described above is mounted on an insulating partition (CN 221961509U). As the insulating partition moves upward, the device functions as ranging and alarm.

[0054] The ranging module uses the microcontroller in the ultrasonic transceiver to process the signal and execute the algorithm to accurately measure the distance between the insulating partition and the charged body being measured. Once the distance reaches the preset value, an audible and visual alarm is triggered immediately.

[0055] The ranging module uses a high-precision ultrasonic transceiver, which greatly improves the accuracy of the measured values ​​and can effectively control the error to about 2%.

[0056] Users only need to press the start button on the device, and the ultrasonic ranging device will automatically turn on, enter self-test standby mode, and prepare for the next operation.

[0057] Users can set the audible and visual alarm distance using the settings button integrated on the module.

[0058] After the user confirms that the alarm distance setting is correct, simply click the "Set" button again, and the ranging module will start working. Once the device reaches or falls below the set alarm distance, it will trigger an audible and visual alarm.

[0059] The above content is merely an example and illustration of the concept of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the concept of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. An ultrasonic ranging and positioning alarm device for electrical safety equipment, characterized in that, It consists of an ultrasonic sensor module, a buzzer alarm module, a button control module, and a digital tube display module, all of which are connected to the main controller module. The ultrasonic sensor module is used to measure the distance, the button control module is used to set the safety distance, and the digital tube display module displays the result. When the main controller module determines that the measured distance is less than the set safety distance, the buzzer alarm module will activate the alarm.

2. The ultrasonic ranging and positioning alarm device for electrical safety equipment as described in claim 1, characterized in that, The main controller module uses an STC89C52 microcontroller as the core control unit. When the measured distance is less than the set distance, the main control chip compares the measured value with the set value and then controls the buzzer to sound an alarm.

3. The ultrasonic ranging and positioning alarm device for electrical safety equipment as described in claim 1, characterized in that, It is powered by a single 14500 AA lithium battery at 4.5V.

4. The ultrasonic ranging and positioning alarm device for electrical safety equipment as described in claim 1, characterized in that, The ultrasonic sensor module uses the HC-SR04 ultrasonic module, which provides non-contact distance sensing function from 2cm to 400cm, with a ranging accuracy of up to 3mm.

5. The ultrasonic ranging and positioning alarm device for electrical safety equipment as described in claim 4, characterized in that, The ultrasonic sensor module uses the TRIG trigger for ranging via the IO port, providing a high-level signal of at least 10µs. The module automatically sends eight 40kHz square waves and automatically detects whether a signal is returned. If a signal is returned, a high-level signal is output via the ECHO IO port. The duration of the high-level signal is the time it takes for the ultrasonic wave to travel from emission to return. The test distance = (high-level time * speed of sound) / 2. The HC-SR04 ultrasonic detection module is used as follows: Trigger via the IO port by providing a high level of at least 10µs to the Trig port to start the measurement. The module automatically sends eight 40kHz square waves and automatically detects whether a signal is returned. If a signal is returned, a high level is output through the Echo port. The duration of the high level is the time it takes for the ultrasonic wave to travel from emission to return. The test distance = (high level time * 340) / 2, in meters. The test function in the program is mainly completed by two functions. In the implementation, timer (0) is used for timing measurement, with a frequency division of 8. The preset value of TCNTT0 is 0XCE. When timer0 overflow interrupt occurs 2500 times, it is 125ms. The calculation formula is as follows: T = (Timer (0) overflow count * (0XFF - 0XCE)) / 1000 The initial value of timer (0) is calculated differently depending on the frequency division, and T is in ms.

6. The ultrasonic ranging and positioning alarm device for electrical safety equipment as described in claim 1, characterized in that, The main controller module is equipped with a clock circuit. XTAL1 and XTAL2 are the input and output of the inverting amplifier, which is configured as an on-chip oscillator. Since one machine cycle contains 6 state cycles and each state cycle is 2 oscillation cycles, one machine cycle has a total of 12 oscillation cycles. If the oscillation frequency of the external quartz crystal oscillator is 12MHz, one oscillation cycle is 1 / 12us, so one machine cycle is 1us.

7. The ultrasonic ranging and positioning alarm device for electrical safety equipment as described in claim 1, characterized in that, The main controller module is equipped with an automatic reset circuit. The reset methods generally include power-on automatic reset and external button manual reset. After the microcontroller clock circuit is working, it can complete the reset operation by continuously giving a high level for 2 machine cycles at the RESET terminal. For example, when using a crystal oscillator with a frequency of 12MHz, the duration of the reset signal should not be less than 2us.

8. The ultrasonic ranging and positioning alarm device for electrical safety equipment as described in claim 1, characterized in that, The buzzer alarm module uses a speaker, a transistor, and a resistor connected to the P13 pin of the microcontroller to form a sound alarm circuit.

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