Testing device for multi-caloric effects

A testing device for multi-caloric effects, comprising:

• a dynamic magnetic field application assembly, a stress application assembly, a pulse voltage application assembly, and an infrared thermal imaging temperature acquisition assembly;
• wherein the dynamic magnetic field application assembly comprises a first linear reciprocating device, two first guide rails, two permanent magnet holding devices, and permanent magnets;
• the two first guide rails are set in parallel and apart from each other;
• the two permanent magnet holding devices are provided and slidably arranged on the two first guide rails, wherein each of the two permanent magnet holding devices has a permanent magnet;
• and the first linear reciprocating device drives the two permanent magnet holding devices to move synchronously in a reciprocating motion;
• the stress application assembly comprises a second linear reciprocating device, a second guide rail, a first sample clamp, and a second sample clamp;
• the first sample clamp and the second sample clamp hold two ends of a sample, respectively;
• the second guide rail is located between the two first guide rails;
• the first sample clamp is slidably arranged on the second guide rail, while the second sample clamp is fixed in place;
• and the second linear reciprocating device drives the first sample clamp to move reciprocally;
• the pulse voltage application assembly comprises a high-voltage amplifier, a pulse-pattern generator, and a photoelectric sensor;
• the pulse-pattern generator generates pulse waves and is connected to the high-voltage amplifier to produce a pulse voltage;
• the pulse voltage is applied to electrode plates of the first sample clamp and the second sample clamp;
• and the photoelectric sensor is used to trigger the pulse-pattern generator and to sense movement of the first sample clamp;
• and the infrared thermal imaging temperature acquisition assembly is used to collect temperature variation information on a sample surface.