CN208110048U - A kind of wearable live early warning positioning device - Google Patents

Abstract

The utility model discloses a wearable on-site early warning positioning device, which comprises a casing, a liquid crystal screen is arranged on the upper end surface of the casing, a cover plate is arranged on the lower end surface of the casing, and two studs are arranged on the inner side of the cover plate. , a circuit board is mounted on two studs, and a GPS module is provided on the circuit board; a strap is provided on the lower surface of the casing, and the two ends of the strap are respectively located at the two ends of the cover plate, and one end of the strap extends into the to the inside of the case, and wound on a wheel, the wheel is connected to a micro-motor, the inner wall of the case is provided with a speaker, the inside of the side is provided with a number of through holes, the speaker is electrically connected to the The voice module on the circuit board, in the wearable on-site early warning and positioning device, the micro motor is used to control the expansion and contraction of the strap, which can make the device suitable for all kinds of people, and the reliable output of the voice circuit can be realized through the voice circuit, further improving In order to improve the practicability of the device, the utility model has a reasonable design and is suitable for popularization and use.

Description

A wearable on-site early warning and positioning device

technical field

The utility model relates to the field of traffic police early warning devices, in particular to a wearable on-site early warning positioning device.

Background technique

In the existing on-site early warning and positioning devices, some of them can be worn, which greatly improves the portability of the device, but because the tightness of the straps of the device is uniform, when worn by different policemen, there are Some will cause discomfort, and some cannot be worn, which reduces the practicability of the device; not only that, but the device is generally equipped with voice functions, but the insufficient output power of these voice circuits reduces the practicability of the device.

Utility model content

In order to overcome the above disadvantages, the utility model provides a wearable on-site early warning and positioning device.

The utility model realizes above-mentioned purpose through following technical scheme:

A wearable on-site early warning and positioning device includes a casing, a liquid crystal screen is arranged on the upper surface of the casing, a cover plate is arranged on the lower surface of the casing, two studs are arranged on the inner side of the cover plate, and the two studs There is a circuit board on the upper shelf, and a GPS module is provided on the circuit board;

The lower end surface of the casing is provided with a strap, and the two ends of the strap are respectively located at the two ends of the cover plate, and one end of the strap extends into the inside of the casing, and is wound on a runner, and the runner drives There is a micro motor connected;

When the staff wears the device, they first put their wrists between the strap and the casing, and then the micro motor starts to work and pull the strap; when the proper position is reached, the staff pauses the satellite motor and remembers it for next time wearing use.

Wherein, the cover plate is hinged with the casing, and when opened, the circuit board can be exposed from the casing, at this time, the circuit board can be disassembled by turning the stud, which improves the practicability of the device.

The inner wall of the casing is provided with a loudspeaker, and the inside of the side is provided with a plurality of through holes, and the loudspeaker is electrically connected with a voice module arranged on the circuit board, and the voice module includes a voice circuit, and the voice circuit includes an operational amplifier, a first resistor , the second resistor, the third resistor, the fourth resistor, the first capacitor, the second capacitor, the third capacitor, the fourth capacitor, the fifth capacitor, the sixth capacitor and the seventh capacitor, the model of the operational amplifier is TDA2040, the operational amplifier The first terminal of the operational amplifier is connected to the first capacitor and grounded through the first resistor, the second terminal of the operational amplifier is grounded through a series circuit composed of the second resistor and the second capacitor, and is connected to the fourth terminal of the operational amplifier through the third resistor , the fourth terminal of the operational amplifier is connected through a series circuit composed of the fourth resistor and the seventh capacitor, the fourth terminal of the operational amplifier is electrically connected to the speaker, the third terminal of the operational amplifier is grounded through the fourth capacitor and the sixth capacitor respectively, and The -9V DC voltage power supply is externally connected, the fifth terminal of the operational amplifier is grounded respectively through the third capacitor and the fifth capacitor, and the +9V DC voltage power supply is externally connected.

In the voice circuit, the first terminal of the op amp inputs the audio signal, which is filtered by the RC filter circuit composed of the first capacitor and the first resistor, and then after the power amplification of the op amp, the maximum output power can reach 18W, and at the same time The distortion rate is 0.05%, thereby greatly improving the reliability of voice output and improving the reliability of the device.

Preferably, the casing is provided with two guide wheels, and the two guide wheels are respectively located at the junction of the strap and the casing, so that when one end of the strap stretches in and out of the casing, it can pass through the guide wheels. Guide to prevent damage to straps.

Preferably, the liquid crystal screen is a capacitive touch screen.

Preferably, in order to improve the safety level of the device, the flame retardant level of the casing is V-0.

Preferably, in order to improve the battery life of the device, a storage battery is also provided inside the casing.

The beneficial effects of the utility model are: in the wearable on-site early warning and positioning device, the micro motor is used to control the expansion and contraction of the strap, so that the device can be applied to various groups of people, and not only that, the voice circuit can be used to realize the reliability of the voice circuit. output, further enhancing the utility of the device.

Description of drawings

The utility model will be explained by way of example and with reference to the accompanying drawings, wherein:

Fig. 1 is a structural representation of the utility model;

Fig. 2 is the circuit schematic diagram of the speech circuit of the present utility model.

In the figure: 1. Case, 2. LCD screen, 3. Cover plate, 4. Stud, 5. Circuit board, 6. Strap, 7. Wheel, 8. Micro motor, 9. Guide wheel, 10. Speaker, 11. Through hole, U1. Operational amplifier, R1. First resistor, R2. Second resistor, R3. Third resistor, R4. Fourth resistor, C1. First capacitor, C2. Second capacitor, C3. The third capacitor, C4. the fourth capacitor, C5. the fifth capacitor, C6. the sixth capacitor, C7. the seventh capacitor.

Detailed ways

Now in conjunction with accompanying drawing, the utility model is described in further detail. These drawings are all simplified schematic diagrams, and only schematically illustrate the basic structure of the utility model, so they only show the configurations related to the utility model.

Specific embodiment 1:

As shown in Figures 1 and 2, a wearable on-site early warning positioning device includes a casing 1, a liquid crystal screen 2 is provided on the upper surface of the casing 1, and a cover plate 3 is provided on the lower surface of the casing 1. The inner side of the board 3 is provided with two studs 4, and a circuit board 5 is arranged on the two studs 4, and a GPS module is provided on the circuit board 5; The two ends of the belt 6 are respectively located at the two ends of the cover plate 3, and one end of the binding belt 6 extends into the inside of the casing 1 and is wound on a runner 7, which is connected with a micro motor 8 in transmission; The inner wall of the casing 1 is provided with a speaker 10, and the inside of the side is provided with a plurality of through holes 11. The speaker 10 is electrically connected with a voice module arranged on the circuit board 5. The voice module includes a voice circuit, and the voice circuit includes an operational amplifier. U1, first resistor R1, second resistor R2, third resistor R3, fourth resistor R4, first capacitor C1, second capacitor C2, third capacitor C3, fourth capacitor C4, fifth capacitor C5, sixth capacitor C6 and the seventh capacitor C7, the model of the operational amplifier U1 is TDA2040, the first terminal of the operational amplifier U1 is connected to the first capacitor C1, and grounded through the first resistor R1, the second terminal of the operational amplifier U1 is connected through the second resistor R2 and The series circuit formed by the second capacitor C2 is grounded, and is connected to the fourth terminal of the operational amplifier U1 through the third resistor R3, and the fourth terminal of the operational amplifier U1 is connected to the series circuit formed by the fourth resistor R4 and the seventh capacitor C7. The fourth terminal of the amplifier U1 is electrically connected to the speaker 10, the third terminal of the operational amplifier U1 is grounded respectively through the fourth capacitor C4 and the sixth capacitor C6, and is externally connected to a -9V DC voltage power supply, and the fifth terminal of the operational amplifier U1 is respectively connected through the fourth capacitor C4 and the sixth capacitor C6. The third capacitor C3 and the fifth capacitor C5 are grounded and connected to a +9V DC voltage power supply; the casing 1 is provided with two guide wheels 9, and the two guide wheels 9 are respectively located at the junction of the strap 6 and the casing 1; The liquid crystal screen 2 is a capacitive touch screen; the flame retardant grade of the casing 1 is V-0; the casing 1 is also provided with a storage battery.

The above is based on the inspiration of the utility model, and through the above description, relevant staff can make various changes and modifications within the scope of not deviating from the technical idea of the utility model. The technical scope of this utility model is not limited to the content in the description, but must be determined according to the scope of the claims.

Claims (5)

1. a kind of wearable live early warning positioning device, it is characterised in that：Including casing, the upper surface of casing is equipped with one block of liquid crystal Screen, the lower end surface of casing are equipped with one piece of cover board, and the inside of cover board is equipped with two studs, is provided with a route on two studs Plate, wiring board are equipped with GPS module；

The lower end surface of the casing is equipped with a bandage, and the both ends of bandage are located at the both ends of cover board, and one end of bandage is protruded into To the inside of casing, and on a runner, runner is sequentially connected with a micromotor；

The inner wall of the casing is equipped with a loudspeaker, and the inside of the side is equipped with several through-holes, and loudspeaker is electrically connected with setting Voice module in the circuit board, voice module include sound circuit, sound circuit include amplifier, first resistor, second resistance, 3rd resistor, the 4th resistance, first capacitor, the second capacitor, third capacitor, the 4th capacitor, the 5th capacitor, the 6th capacitor and the 7th Capacitor, the model TDA2040 of amplifier, the first end of amplifier are connect with first capacitor, and are grounded by first resistor, amplifier The series circuit ground connection that second end is made up of second resistance and the second capacitor, and connected by the 4th end of 3rd resistor and amplifier It connects, the series circuit connection that the 4th end of amplifier is made up of the 4th resistance and the 7th capacitor, the 4th end of amplifier and loudspeaker Electrical connection, the third end of amplifier passes through the 4th capacitor and the 6th capacity earth, and external -9V DC voltage power supply, amplifier respectively The 5th end pass through third capacitor and the 5th capacity earth, and external+9V DC voltage power supply respectively.

2. wearable live early warning positioning device according to claim 1, it is characterised in that：There are two being set on the casing Directive wheel, two directive wheels are located at the junction of bandage and casing.

3. wearable live early warning positioning device according to claim 1, it is characterised in that：The liquid crystal display is condenser type Touch screen.

4. wearable live early warning positioning device according to claim 1, it is characterised in that：The flame retardant rating of the casing For V-0.

5. wearable live early warning positioning device according to claim 1, it is characterised in that：The inside of the casing is also set There is battery.