Pressure sensor and detection device

A preparation method for a pressure sensor, comprising:

• forming a first electrode plate and a detection inductor on a first substrate, wherein the detection inductor comprises a plurality of coil structures connected in sequence, each of the coil structures comprises a first trace, a second trace and a conductive post, the first trace is disposed on a side of the first substrate facing the second substrate, the second trace is disposed on a side of the first substrate away from the second substrate, an orthographic projection of the first trace on the first substrate and an orthographic projection of the second trace on the first substrate intersect with each other, and the first trace is electrically connected to the second trace at an intersection position through the conductive post;
• forming a second electrode plate on a second substrate, wherein the second substrate comprises a pressure-sensitive membrane, and the second electrode plate is arranged on the pressure-sensitive membrane;
• connecting the first substrate to the second substrate;
• after the first substrate is connected to the second substrate, a sealed pressure reference cavity is formed between the pressure-sensitive membrane and the first substrate, the pressure-sensitive membrane is allowed to deform towards or away from the first substrate, the first electrode plate and the second electrode plate form a capacitor, and the detection inductor and the capacitor are connected in series to form an inductance-capacitance resonant circuit.