An Internet of Thing (IoT) device includes a camera coupled to a processor; and a wireless transceiver coupled to the processor. Blockchain smart contracts can be used with the device to facilitate secure operation.

An Internet of Thing (IoT) sport device includes a sensor coupled to a processor; and a wireless transceiver coupled to the processor.

The fencing sword comprises a handle, a guard, and a short shaft in place of the blade. Weights may be added/removed from the shaft to adjust the weight of the fencing sword. The weights can additionally be added/removed from other fencing swords having different handle designs from other forms of fencing. In some embodiments, a laser pointer is mounted to or near the shaft. The laser may register on a target mimicking scoring a touch in a bout and can be used to train a user's accuracy.

The fencing sword comprises a handle, a guard, and a short shaft in place of the blade. Weights may be added/removed from the shaft to adjust the weight of the fencing sword. The weights can additionally be added/removed from other fencing swords having different handle designs from other forms of fencing. In some embodiments, a laser pointer is mounted to or near the shaft. The laser may register on a target mimicking scoring a touch in a bout and can be used to train a user's accuracy.

An Internet of Thing (IoT) sport device includes a body with a processor, a camera and a wireless transceiver coupled to the processor.

An Internet of Thing (IoT) sport device includes a camera coupled to a processor; and a wireless transceiver coupled to the processor.

An Internet of Thing (IoT) sport device includes a helmet and sensors including a camera and an accelerometer; a processor; and a wireless transceiver coupled to the processor.

Systems, apparatuses and methods may obtain motion data, obtain audio data, and detect a collision between a handheld device and an object based on the motion data and the audio data. In one example, noise may be removed from the motion data and the audio data to obtain filtered collision data, wherein the object is classified based on the filtered collision data.

An Internet of Thing (IoT) sport device includes a light source; sensors including a camera and a microphone array; a processor coupled to the light source and the sensor; and a wireless transceiver coupled to the processor.

An armed combat interactive system based on high frequency wireless scoring, comprising a moving device, a combat device, a protecting device, a wireless identification control device and a scoring disposing device. When a first conductive part of one combat device touches a second conductive part of the protecting device corresponding to the other combat device, the wireless identification control device corresponding to one combat device sends a high frequency impulse signal with an ID identification code, and the wireless identification control device corresponding to the other combat device receives the high frequency impulse signal with the ID identification code and sends a scoring signal to the scoring disposing device. The scoring disposing device records the score.