Torque detection device and torque detection assembly

A torque detection assembly, comprising:

• a shaft;
• and
• a torque detection device including at least one conductive ring and an internal device, wherein:
• the at least one conductive ring is disposed at the shaft;
• the at least one conductive ring receives a first power in a sliding contact manner;
• the internal device is disposed at the shaft and includes a torque sensing module, an internal voltage regulating circuit, and an internal control module, wherein:
• the torque sensing module senses a torque of the shaft and generates a corresponding electrical signal;
• the internal voltage regulating circuit is electrically connected to the at least one conductive ring;
• the internal voltage regulating circuit is controllable to change a voltage of the first power on the at least one conductive ring;
• the internal control module is electrically connected to the torque sensing module and the internal voltage regulating circuit;
• the internal control module determines the torque sensed by the torque sensing module based on the electrical signal;
• the internal control module controls the internal voltage regulating circuit to change the voltage of the first power on the at least one conductive ring based on the torque sensed by the torque sensing module to form a first varied voltage signal;
• the first varied voltage signal varies to be a first voltage or a second voltage, wherein the second voltage is less than the first voltage;
• the internal device includes a power conversion module electrically connected to the at least one conductive ring;
• the power conversion module has a power output port electrically connected to the torque sensing module and the internal control module;
• the power conversion module converts the first power to a second power with a working voltage and outputs the second power from the power output port to the torque sensing module and the internal control module;
• the working voltage is less than the second voltage of the first varied voltage signal;
• the internal voltage regulating circuit includes a Zener diode and a switch element connected in series;
• the switch element of the internal voltage regulating circuit is electrically connected to the internal control module and is controllable to be turned on or cut off by the internal control module;
• when the switch element of the internal voltage regulating circuit is cut off, the first power has the first voltage;
• when the switch element of the internal voltage regulating circuit is turned on, the Zener diode of the internal voltage regulating circuit causes the first power to have the second voltage;
• the at least one conductive ring includes two conductive rings;
• a cathode of the Zener diode of the internal voltage regulating circuit is connected to one of the two conductive rings;
• an anode of the Zener diode of the internal voltage regulating circuit is connected to a first terminal of the switch element of the internal voltage regulating circuit;
• a second terminal of the switch element of the internal voltage regulating circuit is connected to the other conductive ring;
• a third terminal of the switch element of the internal voltage regulating circuit is controllable to be turned on or cut off between the first terminal and the second terminal;
• when the switch element of the internal voltage regulating circuit is turned on by the internal control module, the Zener diode of the internal voltage regulating circuit exhibits reverse breakdown, and a voltage between the two conductive rings is a breakdown voltage of the Zener diode of the internal voltage regulating circuit;
• the breakdown voltage constitutes the second voltage;
• when the switch element of the internal voltage regulating circuit is cut off by the internal control module, the voltage between the two conductive rings is maintained at the first voltage.