A flexible measuring ruler, comprising:
- a flexible ruler body;
- a conductive layer, disposed on the flexible ruler body, the conducting layer being regularly arranged along a length direction of the flexible ruler body, thereby making a linear resistance of the conductive layer change regularly along the length direction of the flexible ruler body;
- a measuring device, comprising a data collector and a date processor;
- wherein the data collector comprises:
- a resistance measuring circuit, and the resistance measuring circuit comprises:
- a positive probe, a negative probe, and a data output terminal;
- when measuring with the flexible ruler body, the positive probe and the negative probe are correspondingly connected to the conductive layer to measure a resistance value of a part of the conductive layer corresponding to a measuring part of the flexible ruler body;
- the data processor is electrically connected to the data output terminal, the data processor is configured to convert the resistance value measured by the data collector into a length value based on a variation rule of the linear resistance of the conductive layer along the length direction of the flexible ruler body;
- wherein the flexible measuring ruler comprises a shell, an end of the flexible ruler body extends from an inner side of the shell to an outer side of the shell, and an extended end of the flexible ruler body is capable of moving along the length direction of the flexible ruler body;
- the conductive layer is disposed on a top of the flexible ruler body;
- a bottom of the flexible ruler body is provided with a connecting layer arranged along the length direction of the flexible ruler body;
- an end of the connecting layer close to the extended end of the flexible ruler body is electrically connected to the conductive layer through the flexible ruler body, the positive probe is disposed above the extended end of the flexible ruler body, the positive probe is in contact with the conductive layer, and the negative probe is connected to an end of the connecting layer facing away from the extended end of flexible ruler body;
- or
- the conductive layer is sleeved on an outer side of the flexible ruler body, an inner side of the flexible ruler body is provided with a connecting layer arranged along the length direction of the flexible ruler body, the flexible ruler body is sleeved on an outer side of the connecting layer, and an end of the conductive layer close to the extended end of the flexible ruler body is electrically connected to the connecting layer;
- the positive probe is disposed above the extended end of the flexible ruler body, the positive probe is in contact with the conductive layer, and the negative probe is connected to an end of the connecting layer facing away from the extended end of flexible ruler body.