Internet connected ultrasonic alarm device with adjustable trigger range and SD Card support

This is a quick overview of a device that gives audio and visual alarm when it's triggered. The sensor used for object detection is an ultrasonic sensor with a triggering range from 1cm to 300cm and a beam angle of 30 degree from the point of origin. This triggering range is adjustable at 30cm interval via a dial in the front of the device and the set triggering range is visible via the 10 segments LED on top of the device.

The combination of narrower beam angle and adjustable triggering range makes this device an ideal candidate for applications that need to minimize false alarm.

Note,

This device uses SD Card (storage capacity up to 32GB) as its storage. The audio to be playback needs to be pre-recorded and stored in the SD Card. If you need to be able to record new audio on the spot and the audio is less than 40 seconds, please refer to the link below.

https://wei48221.blogspot.com/2019/06/internet-connected-ultrasonic-alarm.html.

Adjustable Trigger Range 

The device has a maximum detection range of 300cm (~118inch) and this range is adjustable by turning the dial as indicated below.

100% - The device will be triggered when it detects an object within 300cm (~118inch).

50% - The device will be triggered when it detects an object within 150cm (~60inch).

10% - The device will be triggered when it detects an object within 30cm (~11.8inch).

0% - The device won't be triggered.

Note that the pics shown above are taken from version 2 of the device (which includes 2 LEDs to indicate whether the device is functioning (Green LED) and whether the device has been triggered (Red LED).

Potential Usages

Specifications

Trigger Range:

- 1cm ~ 300cm.

Beam Angle:

- Approximately 30 degrees from the point of origin.

Audio Capacity:

- SD Card Storage Capacity: Up to 32GB;
- Audio Format: MP3, WAV;
- Sample Rate: 8K ~ 48K;
- Bit Rate: 8K ~ 320Kbps.

Network Interface:

- 802.11 b/g/n WiFi.

Alarm (local):

- Playback pre-recorded audio via built-in / external speaker;
- Switch on external warning device (light, buzzer, etc.) via dry contact.

Alarm (via internet):

- Email;
- Instant Message (Telegram).

Input Power:

- DC 5V / 1A.

Dimension:

- 125mm x 80mm x 32mm.

Device Configuration

The following parameters could be edited by the device administrator to meet different application needs.

Message Example

I/O Interface

Front I/O Interface Description 

Power and Volume Control

External Speaker Connector, Previous and Next Buttons

Dry Contact Output Connector, Sensor Detection Range Adjustment

Dry Contact Output Wiring Reference

Rear I/O Interface Description 

Additional Offer - Backend Management System

The device's ability to be connected to the Internet opens up door to many possibilities. Please visit the site below for a cloud-based messaging system that uses Telegram as the client-side App. This cloud system was developed to simplify the routing and setting of trigger message.

https://wei48221.blogspot.com/2019/10/cloud-based-messaging-system-with.html