CN218939038U

CN218939038U - Automatic voice alarm terminal based on wireless network

Info

Publication number: CN218939038U
Application number: CN202222419224.9U
Authority: CN
Inventors: 李奇; 田青
Original assignee: Xi'an Mobile Lianxin Intelligent Technology Co ltd
Current assignee: Xi'an Mobile Lianxin Intelligent Technology Co ltd
Priority date: 2022-09-13
Filing date: 2022-09-13
Publication date: 2023-04-28
Anticipated expiration: 2032-09-13

Abstract

The utility model discloses an automatic voice alarm terminal based on a wireless network, which comprises a circuit board (1) and a shell (2), wherein the circuit board (1) is arranged in the shell (2), an MCU-control circuit, a voice amplification circuit, a loudspeaker, an acceleration sensor circuit, a magnetic switch sensor circuit and a noise monitoring sensor circuit are arranged on the circuit board (1), the acceleration sensor circuit, the magnetic switch sensor circuit and the noise monitoring sensor circuit are respectively and electrically connected with the MCU-control circuit, the MCU-control circuit is electrically connected with the voice control circuit, the voice control circuit is electrically connected with the voice amplification circuit, the voice amplification circuit is electrically connected with the loudspeaker, a magnet (3) is fixed on the inner wall of the shell (2), and the setting position of the magnet (3) corresponds to and is close to the position of the magnetic switch sensor circuit.

Description

Automatic voice alarm terminal based on wireless network

Technical Field

The utility model belongs to the technical field of alarm terminals, and particularly relates to an automatic voice alarm terminal based on a wireless network.

Background

The alarm terminal mainly realizes the function of the terminal equipment for automatically giving out a voice alarm to remind workers of emergency treatment of emergency when the terminal equipment is abnormal in operation.

The current realization scheme of the alarm terminal is as follows:

1. the voice content cannot be updated remotely due to fixed broadcasting content though USB flash disk upgrading or Bluetooth near field upgrading;

2. the voice size is adjusted on site through the keys, so that the voice size cannot be automatically adjusted.

3. In order to avoid the damage of the alarm terminal, the monitoring of the camera is increased, and the cost is increased.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide an automatic voice alarm terminal based on a wireless network.

In order to solve the technical problems, the technical scheme of the utility model is as follows: the utility model provides an automatic voice alarm terminal based on wireless network, includes circuit board and shell, and the circuit board is installed inside the shell, be provided with MCU-control circuit, voice amplification circuit, speaker, acceleration sensor circuit, magnetic switch sensor circuit and noise monitoring sensor circuit on the circuit board, acceleration sensor circuit, magnetic switch sensor circuit and noise monitoring sensor circuit are connected with MCU-control circuit electricity respectively, MCU-control circuit is connected with voice control circuit electricity, voice control circuit is connected with voice amplification circuit electricity, voice amplification circuit is connected with the speaker electricity, the shell inner wall is fixed with magnet, and the position of setting of magnet corresponds and is close to with the position of magnetic switch sensor circuit.

Preferably, the MCU-control circuit includes a bluetooth chip U10, a bluetooth antenna J6, a magnetic bead L5, a crystal oscillator X2, a crystal oscillator X3, a capacitor C1, a capacitor C18, a capacitor C19, a capacitor C20, a capacitor C21, a capacitor C24, a capacitor C25, a capacitor C24, a capacitor C27, a capacitor C28, a capacitor C29, a capacitor C30, a capacitor C32, an inductor L8, an inductor L9, a resistor R20, and a resistor R68;

the 1 pin of the Bluetooth chip U10 is connected with a capacitor C20, and the other end of the capacitor C20 is grounded;

the 2 pins of the Bluetooth chip U10 are respectively connected with a capacitor C21 and a crystal oscillator X3, the other end of the capacitor C21 is connected with a capacitor C24 and grounded, and the other end of the capacitor C24 is respectively connected with the other end of the crystal oscillator X3 and the 3 pins of the Bluetooth chip U10;

the pin 13 of the Bluetooth chip U10 is respectively connected with the magnetic bead L5 and the capacitor C25, and the other end of the capacitor C25 is grounded;

the 24 pin of the Bluetooth chip U10 is respectively connected with a capacitor C1 and a resistor R20, the other end of the capacitor C1 is grounded, the other end of the resistor R20 is connected with a resistor R68, and the other end of the resistor R68 is connected with the 26 pin of the Bluetooth chip U10;

the pin 30 of the Bluetooth chip U10 is respectively connected with a capacitor C32 and an inductor L2, the other end of the capacitor C32 is grounded, and the other end of the inductor L2 is connected with a Bluetooth antenna J6;

the pin 32 of the Bluetooth chip U10 is connected with the capacitor C30, the other end of the capacitor C30 is connected with the capacitor C29 and grounded, and the other end of the capacitor C29 is connected with the pin 33 of the Bluetooth chip U10;

the pin 34 of the Bluetooth chip U10 is respectively connected with the pin 3 of the crystal oscillator X2 and the capacitor C28, the other end of the capacitor C28 is connected with the capacitor C27 and grounded, the other end of the capacitor C27 is respectively connected with the pin 1 of the crystal oscillator X2 and the pin 35 of the Bluetooth chip U10, the pin 36 of the Bluetooth chip U10 is connected with the capacitor C26, the other end of the capacitor C26 is respectively connected with the pin 2 and the pin 4 of the crystal oscillator X2, and the capacitor C26 is grounded;

the pin 45 of the Bluetooth chip U10 is connected with the capacitor C18, the pin 45 of the Bluetooth chip U10 is also grounded, the other end of the capacitor C18 is respectively connected with the inductor L9 and the pin 46 of the Bluetooth chip U10, the other end of the inductor L9 is connected with the inductor L8, and the other end of the inductor L8 is connected with the pin 47 of the Bluetooth chip U10;

the 48 feet of the Bluetooth chip U10 are connected with the capacitor C19, and the other end of the capacitor C19 is grounded.

Preferably, the voice control circuit comprises a voice chip U3, a filter capacitor C5 and a filter capacitor C12, wherein the 1 pin of the voice chip U3 is connected with the 20 pin of the Bluetooth chip U10, the 2 pin of the voice chip U3 is connected with the 21 pin of the Bluetooth chip U10, the 3 pin of the voice chip U3 is connected with the 22 pin of the Bluetooth chip U10, the 4 pin of the voice chip U3 is connected with the 23 pin of the Bluetooth chip U10, the 6 pin of the voice chip U3 is respectively connected with the filter capacitor C5 and the filter capacitor C12, the other ends of the filter capacitor C5 and the filter capacitor C12 are respectively grounded, the 7 pin of the voice chip U3 is connected with the voice amplifying circuit, and the 8 pin of the voice chip U3 is grounded.

Preferably, the voice amplifying circuit includes a chip U2, a capacitor C13, a capacitor C14, a bypass capacitor C45, a filter capacitor C47, a filter capacitor C48, a capacitor C49, a resistor R21, a resistor R22, a resistor R23, a resistor R33, and a resistor R37;

the 1 pin EN of the chip U2 is connected with the 18 pin of the Bluetooth chip U10 in a network manner, the 2 pin and the 3 pin of the chip U2 are respectively connected with a bypass capacitor C45, and the other end of the bypass capacitor C45 is grounded;

the 4 pin of the chip U2 is respectively connected with a resistor R33 and a resistor R37, the other end of the resistor R33 is connected with a capacitor C49, the other end of the capacitor C49 is respectively connected with a resistor R21 and a capacitor C14, the other end of the resistor R21 is respectively connected with a resistor R22 and a capacitor C13, the other end of the resistor R22 is connected with a resistor R23, the other end of the resistor R22 is also connected with the 7 pin of the voice chip U3, and the other ends of the capacitor C13, the capacitor C14 and the resistor R23 are respectively grounded;

the 5 pin of the chip U2 is respectively connected with the 2 pin of the loudspeaker and the resistor R37;

the 6 pin of the chip U2 is respectively connected with a filter capacitor C47 and a filter capacitor C48, and the other ends of the filter capacitor C47 and the filter capacitor C48 are respectively grounded;

the 7 pin of the chip U2 is grounded; the 8 pins of the chip U2 are connected with the 1 pin of the loudspeaker.

Preferably, the acceleration sensor circuit comprises a chip U5, a resistor R1, a resistor R3, a resistor R30, a resistor R67, a filter capacitor C43, a filter capacitor C44 and a filter capacitor C50;

the 1 pin of the chip U5 is respectively connected with the resistor R67 and the 27 pin of the Bluetooth chip U10;

the 2 pin of the chip U5 is connected with a resistor R1; the 3 pin of the chip U5 is connected with a resistor R3, and the other end of the resistor R3 is grounded;

the 4 pins of the chip U5 are respectively connected with the resistor R30 and the 28 pins of the Bluetooth chip U10;

the 5 pin and the 6 pin of the chip U5 are grounded;

the 7 pin of the chip U5 is respectively connected with a filter capacitor C43, a filter capacitor C44 and a filter capacitor C50, and the 7 pin of the chip U5 is also grounded;

the 8 pin of the chip U5 is respectively connected with a filter capacitor C43, a filter capacitor C44 and a filter capacitor C50, and the 8 pin of the chip U5 is also grounded;

the pin 9 and the pin 10 of the chip U5 are respectively connected with the other ends of the filter capacitor C43, the filter capacitor C44 and the filter capacitor C50;

the 11 pin of the chip U5 is connected with the 42 pin of the Bluetooth chip U10, and the 12 pin of the chip U5 is connected with the 43 pin of the Bluetooth chip U10.

Preferably, the magnetic switch sensor circuit comprises a pull-up resistor R31, a jitter eliminating capacitor C52 and a magnetic switch G2, wherein one end of the pull-up resistor R31 is connected with 3V3-VDD, the other end of the pull-up resistor R31 is respectively connected with the jitter eliminating capacitor C52 and the 10 pin of the Bluetooth chip U10, the other end of the jitter eliminating capacitor C52 is grounded, one end of the magnetic switch G2 is respectively connected with the jitter eliminating capacitor C52 and the 10 pin of the Bluetooth chip U10, and the other end of the magnetic switch G2 is grounded.

Preferably, the magnet 3 is fixed on the inner wall of the upper cover of the housing 2, and the magnet 3 is disposed at a position corresponding to and close to the position of the magnetic switch G2.

Preferably, the noise monitoring sensor circuit includes a chip U12, a filter capacitor C15, a capacitor C23, a capacitor C36, a capacitor C37, a decoupling capacitor C38, a filter capacitor C39, a decoupling capacitor C40, a filter capacitor C42, a resistor R24, a pull-up resistor R29, an adjustable resistor R36, an adjustable gain selector C34 and a sound pickup M5;

the 1 pin of the chip U12 is connected with an adjustable gain tuning C34, the other end of the adjustable gain tuning C34 is connected with the 8 pin of the chip U12, and the 2 pin and the 4 pin of the chip U12 are grounded;

the 3 pin of the chip U12 is connected with an adjustable resistor R36, one end of the adjustable resistor R36 is grounded, the other end of the adjustable resistor R36 is connected with a decoupling capacitor C38, the other end of the decoupling capacitor C38 is respectively connected with a pull-up resistor R29, a capacitor C23 and the 2 pin of the sound pickup M5, the other end of the capacitor C23 is connected with the 1 pin of the sound pickup M5 and is grounded, the other end of the pull-up resistor R29 is respectively connected with the 6 pin of the chip U12, a filter capacitor C42 and a filter capacitor C15, and the other ends of the filter capacitor C42 and the filter capacitor C15 are grounded;

the pin 5 of the chip U12 is respectively connected with a filter capacitor C39 and a decoupling capacitor C40, the other end of the filter capacitor C39 is connected with a resistor R24, the other end of the resistor R24 is grounded, and the other end of the decoupling capacitor C40 is connected with the pin 41 of the Bluetooth chip U10;

the 6 pin of the chip U12 is connected with a capacitor C37, and the other end of the capacitor C37 is grounded;

the pin 7 of the sheet U12 is connected with a capacitor C36, and the other end of the capacitor C36 is grounded.

Preferably, the MCU-control circuit is connected with a plurality of monitored terminals through wireless transmission, and the MCU-control circuit is connected with the background server through wireless transmission.

Compared with the prior art, the utility model has the advantages that:

(1) The utility model discloses an automatic voice alarm terminal based on a wireless network, which can remotely send voice content in a wireless mode, and memorize and update the voice content through an MCU-control circuit and a voice control circuit;

(2) The alarm terminal is internally provided with a noise monitoring sensor circuit and a voice amplifying circuit, wherein the noise monitoring sensor circuit has a noise pickup function, and can realize automatic adjustment of the voice according to the surrounding environment;

(3) The alarm terminal is internally provided with the acceleration sensor circuit and the magnetic switch sensor circuit, so that the equipment can be monitored to be impacted or the cover can be detached, and a voice alarm is sent out, so that the terminal is prevented from being damaged, other equipment is not added, and the cost is reduced.

Drawings

FIG. 1 is a block diagram of an automatic voice alarm terminal based on a wireless network;

FIG. 2 is a schematic diagram of an automatic voice alarm terminal based on a wireless network;

FIG. 3, a circuit diagram of an MCU-control circuit of the present utility model;

FIG. 4 is a circuit diagram of a voice control circuit of the present utility model;

FIG. 5 is a circuit diagram of a voice amplifying circuit of the present utility model;

FIG. 6 is a circuit diagram of an acceleration sensor circuit of the present utility model;

FIG. 7 is a circuit diagram of a magnetic switch sensor circuit of the present utility model;

FIG. 8 is a circuit diagram of a noise monitoring sensor circuit of the present utility model;

FIG. 9 is a flowchart for updating the voice alarm content of the present utility model.

Description of the reference numerals

1. Circuit board 2, shell, 3, magnet, 4, magnetic switch G2.

Detailed Description

The following describes specific embodiments of the present utility model with reference to examples:

it should be noted that the structures, proportions, sizes and the like illustrated in the present specification are used for being understood and read by those skilled in the art in combination with the disclosure of the present utility model, and are not intended to limit the applicable limitations of the present utility model, and any structural modifications, proportional changes or size adjustments should still fall within the scope of the disclosure of the present utility model without affecting the efficacy and achievement of the present utility model.

Example 1

As shown in fig. 1 and 2, the utility model discloses an automatic voice alarm terminal based on a wireless network, which comprises a circuit board 1 and a shell 2, wherein the circuit board 1 is arranged inside the shell 2, an MCU-control circuit, a voice amplification circuit, a loudspeaker, an acceleration sensor circuit, a magnetic switch sensor circuit and a noise monitoring sensor circuit are arranged on the circuit board 1, the acceleration sensor circuit, the magnetic switch sensor circuit and the noise monitoring sensor circuit are respectively and electrically connected with the MCU-control circuit, the MCU-control circuit is electrically connected with the voice control circuit, the voice control circuit is electrically connected with the voice amplification circuit, the voice amplification circuit is electrically connected with the loudspeaker, a magnet 3 is fixed on the inner wall of the shell 2, and the setting position of the magnet 3 corresponds to and is close to the position of the magnetic switch sensor circuit.

Example 2

As shown in fig. 3, the MCU-control circuit includes a bluetooth chip U10, a bluetooth antenna J6, a magnetic bead L5, a crystal oscillator X2, a crystal oscillator X3, a capacitor C1, a capacitor C18, a capacitor C19, a capacitor C20, a capacitor C21, a capacitor C24, a capacitor C25, a capacitor C24, a capacitor C27, a capacitor C28, a capacitor C29, a capacitor C30, a capacitor C32, an inductance L8, an inductance L9, a resistor R20, and a resistor R68;

The use of the magnetic beads L5 reduces the interference of high-frequency signals and improves the stability of the system.

The design of the crystal oscillator X2 and the load capacitors C27 and C28 provides a more accurate 32MHz clock, so that Bluetooth connection is more stable.

The filter capacitors C20, C25, C19, C26 and C29 reduce the ripple of the system by 3.3V, so that the MCU-controller works more stably.

The design of pi-type circuits C32, L2 and C9 of the Bluetooth antenna J6 improves the emission gain of Bluetooth, and the Bluetooth transmission distance is stronger.

The inductance L8 and the inductance L9 are matched with the internal power supply of the Bluetooth chip U10 for replacement, so that the power consumption of the Bluetooth chip U10 during working is reduced.

The MCU-control circuit mainly collects and computes abnormal states of the monitored terminal, and the automatic control voice control circuit broadcasts alarm voice. The voice alarm terminal adopts the nRF52832 type Bluetooth chip, integrates MCU and Bluetooth functions, can realize control communication of other peripheral devices in Bluetooth communication, and ensures that the voice alarm terminal system can work stably for a long time.

Example 3

As shown in fig. 4, the voice control circuit includes a voice chip U3, a filter capacitor C5 and a filter capacitor C12, the 1 pin of the voice chip U3 is connected with the 20 pin of the bluetooth chip U10, the 2 pin of the voice chip U3 is connected with the 21 pin of the bluetooth chip U10, the 3 pin of the voice chip U3 is connected with the 22 pin of the bluetooth chip U10, the 4 pin of the voice chip U3 is connected with the 23 pin of the bluetooth chip U10, the 6 pin of the voice chip U3 is respectively connected with the filter capacitor C5 and the filter capacitor C12, the other ends of the filter capacitor C5 and the filter capacitor C12 are respectively grounded, the 7 pin of the voice chip U3 is connected with the voice amplifying circuit, and the 8 pin of the voice chip U3 is grounded.

The filter capacitor C5 and the filter capacitor C12 reduce the ripple wave of the 3V3_V network and improve the working stability of the voice chip U3.

The voice control circuit selects a voice chip WT588E02B-8S, is a 16-bit DSP voice chip, internally oscillates 32Mhz and 16-bit PWM decoding, and has the greatest advantage that the on-line replacement of the voice content inside the chip can be realized through an MCU or a matched downloader.

As shown in FIG. 9, the

pins

1,2,3 and 4 of the voice chip U3 are connected with the pin of the MCU-control circuit Bluetooth chip U10, thereby realizing SPI communication and updating voice alarm content.

As shown in fig. 5, the voice amplifying circuit includes a chip U2, a capacitor C13, a capacitor C14, a bypass capacitor C45, a filter capacitor C47, a filter capacitor C48, a capacitor C49, a resistor R21, a resistor R22, a resistor R23, a resistor R33, and a resistor R37;

The voice amplifying circuit is realized by a WT4890 chip (a chip U2), the WT4890 is stable in unit gain, external gain can be configured, the miniature MSOP8 is in an ultra-small package, and the BTL output in an ultra-low current turn-off mode can drive a capacitive load.

The pin 1 EN of the chip U2 is connected to the pin 18 of the MCU-control circuit Bluetooth chip U10 in a network manner, so that pop sound possibly generated before and after playing can be eliminated.

The filter capacitor C47 and the filter capacitor C48 are used for improving the audio quality of the chip U2 and eliminating noise.

The bypass capacitor C45 is used to provide half power supply filtering.

The resistor R22, the capacitor C13, the resistor R21 and the capacitor C14 are RC oscillating circuits for improving sound quality.

Example 4

As shown in fig. 6, the acceleration sensor circuit includes a chip U5, a resistor R1, a resistor R3, a resistor R30, a resistor R67, a filter capacitor C43, a filter capacitor C44, and a filter capacitor C50;

the 5 pin and the 6 pin of the chip U5 are grounded;

The resistor R1 plays a protective role.

The filter capacitors C43, C50 and C44 are used for filtering clutter and improving the stability of the power supply.

Resistor R3 selects the communication interface to be the I2C interface.

The pull-up resistors R30 and R67 ensure that the communication of the I2C interface is normal.

The acceleration sensor circuit adopts an LIS2DH12TR chip, and the acceleration sensor circuit mainly aims to monitor the change of external force collision or displacement.

Example 5

As shown in fig. 7, the magnetic switch sensor circuit includes a pull-up resistor R31, a jitter removing capacitor C52 and a magnetic switch G2, one end of the pull-up resistor R31 is connected to 3V3-VDD, the other end of the pull-up resistor R31 is connected to the jitter removing capacitor C52 and the 10 pin of the bluetooth chip U10, the other end of the jitter removing capacitor C52 is grounded, one end of the magnetic switch G2 is connected to the jitter removing capacitor C52 and the 10 pin of the bluetooth chip U10, and the other end of the magnetic switch G2 is grounded.

As shown in fig. 2, the magnet 3 is fixed to the inner wall of the upper cover of the housing 2, and the magnet 3 is disposed at a position corresponding to and close to the position of the magnetic switch G2.

The magnetic switch sensor circuit is an alarm circuit that monitors whether the housing 2 is open.

The pull-up resistor R31 is provided in a high state in a default state.

The debounce capacitor C52 prevents malfunction due to interference.

G2 is a magnetic switch, and the circuit is turned on when the magnet 3 approaches. In the application of this terminal, magnetic switch G2 welds on circuit board 1, and upper cover can fix a magnet 3, and when the upper cover was closed, magnet 3 was close to magnetic switch G2, DETECTs that the detect_KEY network is low level, if the upper cover was torn open, and magnet kept away from magnetic switch, and the detect_KEY network is high level, produces to tear open the lid warning.

Example 6

As shown in fig. 8, the noise monitoring sensor circuit includes a chip U12, a filter capacitor C15, a capacitor C23, a capacitor C36, a capacitor C37, a decoupling capacitor C38, a filter capacitor C39, a decoupling capacitor C40, a filter capacitor C42, a resistor R24, a pull-up resistor R29, an adjustable resistor R36, an adjustable gain tuning C34, and a sound pickup M5;

As shown in fig. 2, the MCU-control circuit is connected with a plurality of monitored terminals through wireless transmission, and the MCU-control circuit is connected with a background server through wireless transmission.

As shown in fig. 8, the noise monitoring sensor circuit mainly comprises a noise pickup and an amplifier, wherein the upper part is a noise pickup part, and the lower part is an amplifier part.

The filter capacitors C42, C15 are used to reduce the supply network 3v3_v ripple.

The pull-up resistor R29 clamps the noise signal high, preventing the noise signal from attenuating.

Decoupling capacitor C38 is used to prevent noise signal attenuation.

The adjustable resistor R36 is used to adjust the noise signal at the middle of the amplifier.

C34 is adjustable gain tuning.

The decoupling capacitor C40 is used to prevent noise signal attenuation.

The filter circuits C39, R24 are used to filter out noise of the amplified signals.

A_OUT is analog output after noise amplification, is connected with an AD acquisition pin in a Bluetooth chip U10 of the MCU control circuit, acquires a voltage value of the AD acquisition pin, and indicates that the larger the obtained voltage value is, the larger the environmental noise is. The noise of the environment is divided into 3 middle levels, and the loudness of the alarm sound in the corresponding 3 middle levels is low in the low-noise environment, the alarm sound is low in the medium-noise environment, and the alarm sound is high in the high-noise environment, so that the automatic regulation of the alarm sound can be realized.

The communication among the terminal, the monitored terminal and the background server is the wireless connection mode of the Internet of things, and various sensor circuits are built in the wireless connection mode, so that the functions of learning and changing voice contents are realized, the voice size function is automatically adjusted, and the voice alarm function is realized when the voice is prevented from being damaged or stolen.

The working principle of the utility model is as follows:

as shown in fig. 1 and 2, the utility model discloses an automatic voice alarm terminal based on a wireless network, a circuit board 1 is arranged in a shell 2, an MCU-control circuit, a voice amplifying circuit, a loudspeaker, an acceleration sensor circuit, a magnetic switch sensor circuit and a noise monitoring sensor circuit are arranged on the circuit board 1, the acceleration sensor circuit, the magnetic switch sensor circuit and the noise monitoring sensor circuit are respectively and electrically connected with the MCU-control circuit, the MCU-control circuit is electrically connected with the voice control circuit, the voice control circuit is electrically connected with the voice amplifying circuit, the voice amplifying circuit is electrically connected with the loudspeaker, a magnet 3 is fixed on the inner wall of the shell 2, the setting position of the magnet 3 corresponds to the position of the magnetic switch sensor circuit and is close to the position of the magnetic switch sensor circuit, the MCU-control circuit is also connected with a plurality of monitored terminals and a background server through wireless transmission, update contents are remotely transmitted in a wireless mode, the MCU-control circuit receives and stores the update voice contents, pins 1,2,3 and 4 of the voice control circuit are connected with pins of the MCU-control circuit to realize communication, the update voice contents can be carried out, and then voice alarm information can be broadcasted through the voice amplifying circuit; the chip U5 in the acceleration sensor circuit is used for monitoring the change of external force collision or displacement; the magnetic switch sensor circuit is used for monitoring whether the shell is opened or not and giving an alarm; the noise monitoring sensor circuit is used for detecting the size of external noise and controlling the size of voice alarm volume through the size of the noise.

The utility model discloses an automatic voice alarm terminal based on a wireless network, which can remotely send voice contents in a wireless mode and memorize and update the voice contents through an MCU-control circuit and a voice control circuit.

The alarm terminal is internally provided with the noise monitoring sensor circuit and the voice amplifying circuit, the noise monitoring sensor circuit has a noise pickup function, and the automatic adjustment of the voice size can be realized according to the surrounding environment.

The alarm terminal is internally provided with the acceleration sensor circuit and the magnetic switch sensor circuit, so that the equipment can be monitored to be impacted or the cover can be detached, and a voice alarm is sent out, so that the terminal is prevented from being damaged, other equipment is not added, and the cost is reduced.

While the preferred embodiments of the present utility model have been described in detail, the present utility model is not limited to the above embodiments, and various changes may be made without departing from the spirit of the present utility model within the knowledge of those skilled in the art.

Many other changes and modifications may be made without departing from the spirit and scope of the utility model. It is to be understood that the utility model is not to be limited to the specific embodiments, but only by the scope of the appended claims.

Claims

1. An automatic voice alarm terminal based on wireless network, which is characterized in that: the intelligent voice control device comprises a circuit board (1) and a shell (2), wherein the circuit board (1) is arranged inside the shell (2), an MCU-control circuit, a voice amplification circuit, a loudspeaker, an acceleration sensor circuit, a magnetic switch sensor circuit and a noise monitoring sensor circuit are arranged on the circuit board (1), the acceleration sensor circuit, the magnetic switch sensor circuit and the noise monitoring sensor circuit are respectively electrically connected with the MCU-control circuit, the MCU-control circuit is electrically connected with the voice control circuit, the voice control circuit is electrically connected with the voice amplification circuit, the voice amplification circuit is electrically connected with the loudspeaker, a magnet (3) is fixed on the inner wall of the shell (2), and the setting position of the magnet (3) corresponds to and is close to the position of the magnetic switch sensor circuit.

2. An automatic voice alarm terminal based on wireless network according to claim 1, characterized in that: the MCU-control circuit comprises a Bluetooth chip U10, a Bluetooth antenna J6, a magnetic bead L5, a crystal oscillator X2, a crystal oscillator X3, a capacitor C1, a capacitor C18, a capacitor C19, a capacitor C20, a capacitor C21, a capacitor C24, a capacitor C25, a capacitor C27, a capacitor C28, a capacitor C29, a capacitor C30, a capacitor C32, an inductor L8, an inductor L9, a resistor R20 and a resistor R68;

3. An automatic voice alarm terminal based on wireless network according to claim 2, characterized in that: the voice control circuit comprises a voice chip U3, a filter capacitor C5 and a filter capacitor C12, wherein the 1 pin of the voice chip U3 is connected with the 20 pin of the Bluetooth chip U10, the 2 pin of the voice chip U3 is connected with the 21 pin of the Bluetooth chip U10, the 3 pin of the voice chip U3 is connected with the 22 pin of the Bluetooth chip U10, the 4 pin of the voice chip U3 is connected with the 23 pin of the Bluetooth chip U10, the 6 pin of the voice chip U3 is respectively connected with the filter capacitor C5 and the filter capacitor C12, the other ends of the filter capacitor C5 and the filter capacitor C12 are respectively grounded, the 7 pin of the voice chip U3 is connected with the voice amplifying circuit, and the 8 pin of the voice chip U3 is grounded.

4. A wireless network-based automatic voice alarm terminal according to claim 3, wherein: the voice amplifying circuit comprises a chip U2, a capacitor C13, a capacitor C14, a bypass capacitor C45, a filter capacitor C47, a filter capacitor C48, a capacitor C49, a resistor R21, a resistor R22, a resistor R23, a resistor R33 and a resistor R37;

5. An automatic voice alarm terminal based on wireless network according to claim 2, characterized in that: the acceleration sensor circuit comprises a chip U5, a resistor R1, a resistor R3, a resistor R30, a resistor R67, a filter capacitor C43, a filter capacitor C44 and a filter capacitor C50;

the 5 pin and the 6 pin of the chip U5 are grounded;

6. An automatic voice alarm terminal based on wireless network according to claim 2, characterized in that: the magnetic switch sensor circuit comprises a pull-up resistor R31, a jitter eliminating capacitor C52 and a magnetic switch G2, wherein one end of the pull-up resistor R31 is connected with 3V3-VDD, the other end of the pull-up resistor R31 is respectively connected with the jitter eliminating capacitor C52 and the 10 pin of the Bluetooth chip U10, the other end of the jitter eliminating capacitor C52 is grounded, one end of the magnetic switch G2 is respectively connected with the jitter eliminating capacitor C52 and the 10 pin of the Bluetooth chip U10, and the other end of the magnetic switch G2 is grounded.

7. The automatic voice alarm terminal based on wireless network according to claim 6, wherein: the magnet (3) is fixed on the inner wall of the upper cover of the shell (2), and the setting position of the magnet (3) corresponds to and is close to the position of the magnetic switch G2.

8. An automatic voice alarm terminal based on wireless network according to claim 2, characterized in that: the noise monitoring sensor circuit comprises a chip U12, a filter capacitor C15, a capacitor C23, a capacitor C36, a capacitor C37, a decoupling capacitor C38, a filter capacitor C39, a decoupling capacitor C40, a filter capacitor C42, a resistor R24, a pull-up resistor R29, an adjustable resistor R36, an adjustable gain tuning C34 and a sound pickup M5;

9. An automatic voice alarm terminal based on wireless network according to claim 1, characterized in that: the MCU-control circuit is connected with a plurality of monitored terminals through wireless transmission, and the MCU-control circuit is connected with the background server through wireless transmission.