Bolt with function of measuring strain
First Claim
1. A bolt with a function of measuring strain, the bolt being provided with a Wheatstone bridge circuit comprising a strain sensor and a dummy resistor, a translate circuit that amplifies a signal from the Wheatstone bridge circuit to convert the same into a digital signal, a transmitting circuit that transmits the digital signal outside the bolt, and a power circuit, by which electromagnetic wave energy received from outside the bolt is supplied as a power source for at least any one of the circuits.
1 Assignment
0 Petitions
Accused Products
Abstract
A bolt with a function of measuring strain, comprising a Wheatstone bridge circuit comprising a strain sensor and a dummy resistor, a translate circuit that amplifies a signal from the Wheatstone bridge circuit to convert the same into a digital signal, a transmitting circuit that transmits the digital signal outside the bolt, and a power circuit, by which electromagnetic wave energy received from outside the bolt is supplied as a power source for at least any one of the circuits.
-
Citations
18 Claims
- 1. A bolt with a function of measuring strain, the bolt being provided with a Wheatstone bridge circuit comprising a strain sensor and a dummy resistor, a translate circuit that amplifies a signal from the Wheatstone bridge circuit to convert the same into a digital signal, a transmitting circuit that transmits the digital signal outside the bolt, and a power circuit, by which electromagnetic wave energy received from outside the bolt is supplied as a power source for at least any one of the circuits.
-
12. A bolt with a function of measuring strain, wherein a Wheatstone bridge circuit comprising a strain sensor and a dummy resistor, a translate circuit that amplifies a signal from the Wheatstone bridge circuit to convert the same into a digital signal, a transmitting circuit that transmits the digital signal outside the bolt, and a power circuit, by which electromagnetic wave energy received from outside the bolt is supplied as a power source for at least any one of the circuits are provided in a hole formed in the bolt, and wherein the translate circuit, the transmitting circuit, and the power circuit are formed on a common semiconductor chip, and a power supply ground of the semiconductor chip and the bolt are electrically connected.
-
13. A bolt with a function of measuring strain, wherein a Wheatstone bridge circuit comprising a strain sensor and a dummy resistor, a translate circuit that amplifies a signal from the Wheatstone bridge circuit to convert the same into a digital signal, a transmitting circuit that transmits the digital signal outside the bolt, and a power circuit, by which electromagnetic wave energy received from outside the bolt becomes a power source for any one of the circuits are mounted in a hole formed in a direction along a lengthwise axis of the bolt, and wherein the Wheatstone bridge circuit and the power circuit are formed on a common monocrystal semiconductor chip.
-
14. A bolt with a function of measuring strain, wherein a Wheatstone bridge circuit comprising a strain sensor and a dummy resistor, a translate circuit that amplifies a signal from the Wheatstone bridge circuit to convert the same into a digital signal, a transmitting circuit that transmits the digital signal outside the bolt, a power circuit, by which electromagnetic wave energy received from outside the bolt becomes a power source for at least any one of the circuits, and a temperature sensor are mounted on the bolt, and the temperature sensor and the Wheatstone bridge circuit are formed in a common silicone monocrystal member, and the temperature sensor comprises an impurity diffusion layer of the member.
- 15. A bolt with a function of measuring strain, wherein a Wheatstone bridge circuit comprising a strain sensor and a dummy resistor is mounted in a hole formed in a direction along a lengthwise axis of the bolt, and the Wheatstone bridge circuit is formed in a single monocrystal semiconductor chip.
Specification