CN211124353U

CN211124353U - Wireless device for transmitting data to smart phones and other devices

Info

Publication number: CN211124353U
Application number: CN201920976765.7U
Authority: CN
Inventors: 大卫凯力力
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-07-28
Anticipated expiration: 2029-06-26

Abstract

The utility model describes a wireless device for measuring temperature and wirelessly sending data to smart mobile phone or other equipment. Data transmission is accomplished by a voltage-to-frequency converter. The transmitter consists of two parts, namely a power supply part/control part and a voltage-to-frequency converter. Data can be transmitted directly through the infrared diode, while by using a pure sinusoidal signal generated by a low pass filter, it can drive a speaker to transmit data acoustically. Unique IDs for multiple sensors are transmitted in a multi-sensor system application by alternating between a frequency based on the sensor signal and a fixed frequency generated by a voltage-to-frequency converter.

Description

Wireless device for transmitting data to smart phones and other devices

Technical Field

The utility model discloses an instrument device, it allows physics/chemistry data sensor and smart mobile phone wireless connection.

Background

The need to measure room temperature, outdoor temperature, or the temperature of certain physical or chemical systems has been of great interest. There are many solutions for the wired type using an analog-to-digital converter with a serial output and transmitting data over a cable.

With the advent of smart phones, we have made use of the capabilities of these devices to obtain data not only from a single sensor, but also from multiple sensors. Because of the heat generating components inside the handset, the sensors inside the handset cannot provide accurate readings. Furthermore, this embodiment would limit the use of the handset to only collect and capture data to one sensor. If the temperature sensor is placed in the handset, it is not possible to measure the outdoor temperature or some physical or chemical system temperature. Described herein are low cost solutions that can collect temperature data from one or more sensors wirelessly.

SUMMERY OF THE UTILITY MODEL

Wireless device for transmitting data to smart phones and other devices, powered by a single battery, the circuit design of the device being such that it can operate at voltages as low as 1.2 volts, transmit ID and temperature by a time division multiplexing scheme, and read multiple sensors simultaneously by one or more smart phones, wherein

Transmitting sensor data to cell phones and other devices using infrared and audio devices;

depending on the different operating modes, continuous or intermittent data may be transmitted;

the system has built-in intelligent hardware, and can generate the unique ID of the system without a microcontroller or firmware and transmit the unique ID.

Drawings

FIG. 1 depicts a detailed design of the power and control sections using a single AA/AAA battery;

FIG. 2 is a detailed design of an analog circuit that connects the sensors and generates an infrared pulse and a single sinusoidal signal proportional to the sensor output;

FIG. 3 shows a flow diagram of the APP software (Android/IOS), which allows for saving data and graphics and comparison functions; and

fig. 4 shows the structural design of the system, which includes the battery housing and the PCB (which contains all the electronic components except the solid-state sensor glued to the metal tip of the probe).

Detailed Description

The system includes a power section that multiplies the battery voltage and produces 5 volts through U1. This situation often occurs when the normally open switch is closed or the power source is open. Depending on the operating mode (continuous/intermittent) determined by U4, the +5V supply is sent through U2 (i.e., MOSFET switch) and converted to bipolar voltage through U3.

R1 and D1(1.2 volt zener diode) produce a reference voltage of 1.2 volts which is compared to the battery voltage via U5. if the battery voltage is below 1.2 volts, L ED, i.e., D2, will light up because R2 limits the current that will pass through D2.

In fig. 2, U6 provides an analog output that is proportional to the measured temperature. R3 with a negative bias allows positive and negative temperatures to be measured. The output of U6 is amplified by U7 and sent to U8 (voltage-to-frequency converter). The other input of the switch is V +.

V + or a voltage corresponding to temperature is sent to U9, U9 being a free oscillator, according to a control signal from U10. In addition, the capacitor (C3 or C4) that controls the output frequency of U9 is switched by U10. Thus, the output of U9 will produce one frequency, which is the identification or ID code, and another frequency corresponding to the temperature measured by U6. The output of U9, which is a square wave, is fed directly to a U12 comparator, which in turn drives D3, where D3 is an infrared emitter.

The output of U9 is also fed into L1-C1 or simple L C (low pass filter providing sinusoidal waveform by filtering harmonics contained in the square wave) then sends the sinusoidal signal to an audio amplifier with gain set by R8 and R9 the output of U9 drives a speaker so that the speaker sends the cell identification signal in an alternating fashion along with the sensor data to a microphone on the handset running the relevant APP for a number of sensors the identification code or frequency can be preset by selecting C4.

Claims

1. A wireless device for transmitting data to a smartphone, powered by a single battery, characterised in that circuitry enables it to operate at voltages as low as 1.2 volts, transmit ID and temperature by a time division multiplexing scheme, and read multiple sensors simultaneously by one or more smartphones, wherein

The wireless device includes a battery case and a PCB;

the wireless equipment is internally provided with infrared and audio equipment for transmitting sensor data to the mobile phone;

transmitting continuous or intermittent data according to different operation modes;

the wireless device is provided with built-in intelligent hardware, and can generate the unique ID of the wireless device and transmit the unique ID without a microcontroller or firmware.