Easily adjustable stroke sensor and method for installing the same

A stroke sensor comprising:

• a magnetic field detecting element that detects a magnetic field;
• a magnet that generates the magnetic field and that is movable in a first direction relative to the magnetic field detecting element;
• and
• a processor that outputs an indicator value based on the magnetic field that is detected by the magnetic field detecting element, wherein the indicator value indicates a position of the magnet relative to the magnetic field detecting element, wherein,
• the magnet and the magnetic field detecting element can be attached to different structures that are movable in the first direction relative to each other such that the magnet is movable in the first direction relative to the magnetic field detecting element within a predetermined relative movable range, and a relationship between the magnetic field and the indicator value is written in the processor,
• the stroke sensor further comprising a jig for preventing positional shift, wherein the jig includes an element that prevents the predetermined relative movable range from being shifted in the first direction when the magnet and the magnetic field detecting element are attached to the different structures;
• and the element can be removed after the magnet and the magnetic field detecting element are attached to the different structures.

A system having a stroke sensor, comprising;

• a first structure;
• a magnet that is attached to the first structure and that generates a magnetic field;
• a second structure that is movable in a first direction relative to the first structure;
• and
• a magnetic field detecting element that is attached to the second structure and that detects the magnetic field, wherein,
• the magnet and the magnetic field detecting element are attached to to the first structure and the second structure, respectively, such that the magnet is movable in the first direction relative to the magnetic field detecting element within a predetermined relative movable range, and
• a space is formed in a vicinity of surfaces of the second structure and the magnet, the surfaces facing a same direction.

A method for installing a stroke sensor, the stroke sensor comprising:

• a magnetic field detecting element that detects a magnetic field;
• a magnet that generates the magnetic field and that is movable in a first direction relative to the magnetic field detecting element;
• and
• a processor that outputs an indicator value based on the magnetic field that is detected by the magnetic field detecting element, wherein the indicator value indicates a position of the magnet relative to the magnetic field detecting element,
• the method comprising the steps of;
• obtaining a relationship between the magnetic field and the indicator value while moving the magnet in the first direction relative to the magnetic field detecting element within a predetermined relative movable range, and writing the relationship in the processor;
• after the relationship is written in the processor, preventing the predetermined relative movable range from being shifted in the first direction by means of means for preventing positional shift;
• attaching the magnet and the magnetic field detecting element, which have been prevented from being shifted, to different structures that are movable in the first direction relative to each other, and removing the means for preventing positional shift.