CN210836511U - A human body induction sound barricade warning device - Google Patents

Abstract

The utility model belongs to the electronic technology, in particular to a human body induction sound roadblock warning device, which comprises a common roadblock base, a triangular alarm lamp and an internal circuit; the internal circuit comprises an infrared induction system, a switching system, a photosensitive control system, a decibel control system, an alarm lamp, an alarm and a power supply; the alarm, the photosensitive control system and the decibel control system are connected in series and then connected in parallel with the alarm lamp, and then connected in series with the infrared induction system, the switch system and the power supply. The warning indicator has the following function 1 that when a person is within 3 meters around the roadblock warning indicator and a human body infrared sensing element is arranged below a triangular warning lamp at the top of the roadblock warning indicator, the triangular warning lamp begins to twinkle light and give out warning sound when sensing that the person approaches the roadblock warning indicator; 2. the warning sound and lights stop 3 meters around the person leaving the barrier siren. Especially aiming at the condition that the sight is poor at night, a person who cannot see the roadblock can mistakenly enter the roadblock area, the blind person or the child can be prevented from approaching the roadblock area through the alarm sound, and accidents are prevented.

Description

A human body induction sound barricade warning device

technical field

The utility model belongs to the field of electronic technology, in particular to a human body induction sound roadblock warning device.

Background technique

In daily life, it is necessary to use warning roadblocks in areas such as construction and dangerous facilities to remind the public. Nowadays, most of the warning methods for warning roadblocks use bright yellow and bright red stripes to remind passers-by. The cost is low but the effect is not high, and For blind people or children with weak awareness of warning signs, it cannot have the proper warning effect, and may even arouse children's curiosity and lead to accidents.

Utility model content

The purpose of the utility model is to provide an audible roadblock warning device capable of sensing the approach of the human body.

In order to achieve the above purpose, the technical scheme adopted by the present utility model is: a human body induction sound roadblock warning device, comprising a common roadblock base, a triangular warning light and an internal circuit; the internal circuit includes an infrared induction system, a switch system, a photosensitive control system, a decibel Control system, alarm light, siren and power supply; alarm, photosensitive control system and decibel control system are connected in series with the alarm light in parallel, and then connected in series with the infrared induction system, switch system and power supply.

In the above-mentioned human body-sensing audible roadblock warning device, a warning reflective sticker is affixed on the common roadblock base.

In the above-mentioned human body induction sound roadblock warning device, the switch system is a manual switch control circuit.

In the above-mentioned human body induction sound roadblock warning device, the decibel control system includes two groups of control circuits in parallel, and each group of control circuits includes a decibel control switch and a control resistor in series.

The beneficial effects of the utility model are as follows: the sound roadblock warning device that can sense the approach of the human body, once someone enters the three-meter range of the roadblock warning device, it will play a warning role in two ways: light and alarm sound. It can be especially aimed at the situation that the roadblock cannot be seen clearly due to poor vision at night, and someone mistakenly enters the roadblock area. It can also prevent blind people or small children from approaching through the alarm sound to prevent accidents.

Description of drawings

1 is a circuit diagram of an alarm device according to an embodiment of the present invention;

FIG. 2 is a circuit schematic diagram of an infrared sensing system according to an embodiment of the present utility model;

FIG. 3 is a schematic circuit diagram of a photosensitive control system according to an embodiment of the present invention;

FIG. 4 is an appearance effect diagram of an embodiment of the present invention.

Detailed ways

The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

This embodiment proposes an audible roadblock warning device that can sense the approach of a human body. Once someone enters the three-meter range of the roadblock warning device, it will play a warning role in two ways: light and alarm sound.

The technical scheme adopted by the utility model is: a human body induction roadblock warning device, comprising: a common roadblock base, a triangular warning light (can be portable) and an internal circuit, the internal circuit includes an infrared induction system, a switch system, a photosensitive control system and a decibel The control system, the alarm, the photosensitive control system and the decibel control system are connected in series with the alarm light, and then connected with the infrared induction system, the switch system and the power supply in series to form the entire circuit. The circuit control panel is at the bottom of the barricade.

In addition, the infrared sensing system senses the infrared light within 3 meters. Once someone approaches, the infrared sensing system turns on the switch, the circuit has current flowing, the alarm light flashes and the siren makes a sharp sound to avoid people approaching.

In addition, the decibel control system selects the appropriate decibel range according to different environments. If the decibel range is larger in a downtown area, it can be adjusted smaller in a quiet residential area.

In addition, the photosensitive control system can sense night and day, the resistance increases at night, the current decreases, and the decibel also decreases, so as to avoid the alarm from disturbing the people.

The warning device of this embodiment has the following functions: 1. When someone is within 3 meters of the roadblock warning device, the infrared sensing element of the human body under the top triangle warning light senses the approach, and the warning light starts to flash and sound an alarm; 2. When the person leaves the roadblock 3 meters around the warning device, the switch will be automatically turned off after a delay, and the alarm sound and lights will stop.

During specific implementation, as shown in FIG. 1 , the internal circuit of this embodiment includes an infrared sensing system, a switch system, a photosensitive control system, a decibel control system and a power supply, and the alarm, photosensitive control system and decibel control system are connected in series and connected in parallel with the alarm light , and then connected in series with the infrared induction system, switching system and power supply. The switch system is a manual switch control circuit. After placing the roadblock warning device in the working area, manually turn on the switch to make the warning device work. The photosensitive control system adjusts the intensity of its own alarm sound by detecting the intensity of external ultraviolet rays. When the light is strong, that is, daytime, the total resistance of the photosensitive control system decreases, which will increase the decibel of the alarm sound. When the light is weak, that is, night, The total resistance of the photosensitive control system increases, and the decibel of the alarm sound decreases. The decibel control system is a control system connected in series with the alarm. It consists of two groups of control circuits in parallel. Each group of control circuits is composed of a decibel control switch and a control resistor. It can be adjusted to different decibel gears to achieve control through the alarm. current, and use this to control the decibel size of the siren. The power supply adopts battery power supply, which can be easily purchased and replaced.

The internal circuit of the infrared sensing system is shown in Figure 2. The circuit is activated by sensing the load caused by the infrared radiation of the human body within three meters nearby, and the sound and light alarms are turned on. The specific principle is: the human body has a constant body temperature, generally at 37 degrees, so it emits infrared rays with a specific wavelength of about 10UM. The passive infrared probe works by detecting the infrared rays emitted by the human body at about 10UM. The infrared rays of about 10UM emitted by the human body are concentrated on the infrared induction source after being enhanced by the Philips filter. Infrared induction sources usually use pyroelectric elements, which lose charge balance when the temperature of the infrared radiation of the human body changes, and release charges outward. After the subsequent circuit is detected and processed, the switching action can be triggered. When someone enters the sensing range of the switch, the special sensor detects the change of the infrared spectrum of the human body, and the switch automatically turns on the load. If the person does not leave the sensing range, the switch will continue to turn on. (The time can be adjusted from 1-5 seconds) to automatically turn off the load. The infrared induction switch has a sensing angle of 120 degrees, so there is an induction element on each of the four sides of the common barricade base, which is connected in parallel inside (the appearance diagram is not fully shown).

The internal circuit of the photosensitive control system is shown in Figure 3. The sound of the siren is adjusted by sensing the presence or absence of light, so as to avoid disturbing the people in the residential area at night.

The working principle is: the photoresistor is connected in series with the resistor R1. When there is no light, that is, the voltage across R1 does not reach the turn-on voltage of the Q1 transistor. turn on, thus causing the subsequent stage Q2 transistor to be turned on, and finally the switch K is turned on. When there is light, the current of the working circuit passes through the switch. At this time, the resistance of the switch is small, the current is large, and the decibel of the alarm sound is also large; when there is no light, the current of the working circuit passes through R0, and its resistance must be larger than that of a switch, so The current flowing through is small, and the decibel of the alarm sound is also small. The photoresistor is next to the infrared sensing element of the common barricade base.

How to use: Place the roadblock warning device in the area that needs to be warned, and there is no obvious obstruction around it. After turning on the main switch, select the decibel level and start working.

As shown in Figure 4, the base of the common roadblock, the triangular warning light (portable) and the internal circuit, the base of the common roadblock is affixed with a warning reflective sticker, which has the warning function of the common roadblock.

It should be understood that the parts not described in detail in this specification belong to the prior art.

Although the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, those of ordinary skill in the art should understand that these are only examples, and various changes or modifications may be made to these embodiments without departing from the scope of the present invention. principle and substance. The scope of the present invention is limited only by the appended claims.

Claims (4)

1. A human body induction sound roadblock warning device is characterized by comprising a common roadblock base, a triangular warning lamp and an internal circuit; the internal circuit comprises an infrared induction system, a switching system, a photosensitive control system, a decibel control system, an alarm lamp, an alarm and a power supply; the alarm, the photosensitive control system and the decibel control system are connected in series and then connected in parallel with the alarm lamp, and then connected in series with the infrared induction system, the switch system and the power supply.

2. The human body induction audible roadblock warning device as defined in claim 1, wherein a warning reflective sticker is affixed to the general roadblock base.

3. The body-sensing audible barrier warning as recited in claim 1, wherein the switch system is a manual switch control circuit.

4. The body-sensible sound barrier warning of claim 1, wherein the decibel control system comprises two sets of control circuits connected in parallel, each set of control circuits comprising a decibel control switch and a control resistor connected in series.

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