A method, apparatus and system are disclosed for the measuring directly in units of force or mass huge load of form 10 to 1000 tons or more. The system includes a unique load carrying member to which the huge load is applied and based on readings of three types of ultrasonic waves and the change in the dimensions of the load carrying member it is able to directly calculate the force in units of newtons or units of mass in kilograms of the applied load.

A method, apparatus and system are disclosed for the measuring directly in units of force or mass huge load of form 10 to 1000 tons or more. The system includes a unique load carrying member to which the huge load is applied and based on readings of three types of ultrasonic waves and the change in the dimensions of the load carrying member it is able to directly calculate the force in units of newtons or units of mass in kilograms of the applied load.

Surface acoustic wave (SAW) weighing apparatus and related methods are provided for measuring weight of a load employing a displaceable elastic member that is displaced by the load. A piezoelectric SAW transducer is coupled to the elastic member. The piezoelectric transducer along with an amplifier electrically coupled thereto form a delay line oscillator circuit that is configured to generate an oscillating signal in response to displacement of the elastic member by the weight of the load. A magnet is spaced from a Hall effect sensor. The magnet produces a magnetic field, and the Hall effect sensor is configured to measure strength of the magnetic field which is related to displacement of the elastic member and the weight of the load. Circuitry generates frequency data that characterizes frequency of the oscillating signal. The frequency data is related to displacement of the elastic member and the weight of the load.

Surface acoustic wave (SAW) weighing apparatus and related methods are provided for measuring weight of a load employing a displaceable elastic member that is displaced by the load. A piezoelectric SAW transducer is coupled to the elastic member. The piezoelectric transducer along with an amplifier electrically coupled thereto form a delay line oscillator circuit that is configured to generate an oscillating signal in response to displacement of the elastic member by the weight of the load. A magnet is spaced from a Hall effect sensor. The magnet produces a magnetic field, and the Hall effect sensor is configured to measure strength of the magnetic field which is related to displacement of the elastic member and the weight of the load. Circuitry generates frequency data that characterizes frequency of the oscillating signal. The frequency data is related to displacement of the elastic member and the weight of the load.

A load cell unit includes: a load cell that is provided with a distortional member including a free-end block, a fixed-end block, an upper beam portion connecting an upper end of the free-end block and an upper end of the fixed-end block, and a lower beam portion connecting a lower end of the free-end block and a lower end of the fixed-end block; a first temperature sensor that is disposed at the upper beam portion or the lower beam portion; and a second temperature sensor that is disposed at one of the free-end block and the fixed-end block.

A load cell unit includes: a load cell that is provided with a distortional member including a free-end block, a fixed-end block, an upper beam portion connecting an upper end of the free-end block and an upper end of the fixed-end block, and a lower beam portion connecting a lower end of the free-end block and a lower end of the fixed-end block; a first temperature sensor that is disposed at the upper beam portion or the lower beam portion; and a second temperature sensor that is disposed at one of the free-end block and the fixed-end block.

Scales for use with cooking appliances such as pressure cookers, and associated systems and methods, are disclosed herein. In several implementations, a scale includes load cells configured to detect a weight of a cooking appliance placed on the scale and any food therein. The scale can further include temperature sensors positioned proximate to corresponding ones of the load cells and configured to detect the temperature proximate to each of the load cells. A processor within or external to the scale is communicatively coupled to the load cells and the temperature sensors, and is configured to determine the weight of the cooking appliance and food based at least in part on the detected weights and the detected temperatures.

Scales for use with cooking appliances such as pressure cookers, and associated systems and methods, are disclosed herein. In several implementations, a scale includes load cells configured to detect a weight of a cooking appliance placed on the scale and any food therein. The scale can further include temperature sensors positioned proximate to corresponding ones of the load cells and configured to detect the temperature proximate to each of the load cells. A processor within or external to the scale is communicatively coupled to the load cells and the temperature sensors, and is configured to determine the weight of the cooking appliance and food based at least in part on the detected weights and the detected temperatures.

A load cell unit includes: a load cell that is provided with a distortional member including a free-end block, a fixed-end block, an upper beam portion connecting an upper end of the free-end block and an upper end of the fixed-end block, and a lower beam portion connecting a lower end of the free-end block and a lower end of the fixed-end block; a first temperature sensor that is disposed at the upper beam portion or the lower beam portion; and a second temperature sensor that is disposed at one of the free-end block and the fixed-end block.

A weighing device and a weighing method, with central digital measured value correction. The weighing device is simulated on a central analytical unit including a digital function simulator of the weighing device. The digital function simulator of the weighing device is trained by a training device so that errors of measurement of the weighing device can be compensated. In this way, it is possible to obtain reliable and precise weighing results with weighing devices of little complexity.