To reliably exercise radio communication of calibration data. In order to achieve the above-described object, a balance (10) includes a weight sensor (12), a built-in weight (20) to be loaded on the weight sensor, an adding and removing unit (21) for the built-in weight, an arithmetic processing unit (14) configured to drive the adding and removing unit, and a radio communication device (41) connected to the arithmetic processing unit, wherein the arithmetic processing unit includes a radio wave environment check section (32) configured to check a radio wave environment, and a calibration execution section (33) configured to add or remove the built-in weight and issue a command to the radio communication device to transfer calibration data when the radio wave environment check section determines that the radio wave is good.

A high precision weighing system and weighing method has a weighing plate and weighing unit separation mechanism and a weight loading mechanism. The weighing plate and weighing unit separation mechanism controls separation of a weighing plate and a weighing unit, so that the weighing plate or the weighing plate and its carried material do not apply force to the weighing unit. The weight loading mechanism loads a weight onto the weighing unit or removes a weight from the weighing unit; the weighing system records a weighing value of the weighing unit during the action of the weighing plate and weighing unit separation mechanism and a sensitivity value during the action of the weight loading mechanism. The weighing system modifies the weighing value at the time of the most recent combination of the weighing plate and the weighing unit based on the recorded weighing and sensitivity values, achieving a high precision.

A method to automatically calibrate a load cell without the need to remove the loading on the load cell. This method takes advantage of the fact that weight stack strength equipment uses generally known discrete weight increments, and any signal drift in the load cell can be automatically recalibrated by offsetting the load cell signal to accurately reflect the expected discrete weight increments without the need for unloading the load cell and without the need for a manual recalibration of the load cells.

Provided is an electronic balance of electromagnetic force type including a weight automatic loading mechanism which can place and remove a weight by its own mechanism without use of either an external balance weight or a built-in balance weight. An electronic balance of electromagnetic force type is provided with a beam equilibrium setting unit that sets two or more equilibrium states of the beam position detecting unit. By making conversion ratios of upper and lower light receiving circuits nonequivalent, an imaginary weight is generated by utilizing the operating principle of the electromagnetic balance of electromagnetic force type.

A scale calibration device and method of use. The device may include a base supportable on and movable along a surface to a location. The base further includes a base surface for supporting a scale to be calibrated proximate the location. The device includes a frame assembly connected to the base and operable to support, in a position over the base surface, means for simulating a dead weight, the means being operable to apply a force to the scale supported on the base surface.

A method to calibrate a Weigh in Motion (WIM) sensor that is arranged in a road flush with a road surface for determining a force exerted on the road surface by a vehicle's wheel transgressing the WIM sensor uses an evaluation unit that calculates the wheel force upon receiving the vehicle's velocity and a distance signal from a first device fixed on the vehicle and coordinates the wheel force with a synchronized signal from the WIM sensor to generate a calibrate function for the WIM sensor. The evaluation unit continuously adjusts the wheel force to take into account one or more of wheel pressure, wheel temperature, wheel tilt and vehicle acceleration. A system employing the method includes the vehicle, the evaluation unit, the first device, a synchronization device such as a GPS unit, and sensors for one or more of pressure, temperature, tilt and acceleration.

An integrated high-precision weighing module is provided which includes a scale pan, a lever, an internal calibration system, a bottom plate assembly, and a sensor main body. The scale pan is mounted on the lever, and the lever is connected to the sensor main body. The internal calibration system, the sensor main body and the lever are arranged transversely, and the internal calibration system and the sensor main body are respectively attached to the bottom plate assembly.

AUTOMATIC CALIBRATION DEVICE FOR CONVEYOR BELT INTEGRATING SCALES, the automatic calibration device for integrating conveyor belt scales (100) is incorporated to a mounted-type integrating conveyor belt scale, mounted to bulk material conveyors, featuring a structure that supports racks with rolled cylinders, which, when assembled, are able to support the conveyor belt; the automatic calibration device (100) with the movement mechanism, comprised in this implementation, by a pair of parallelograms comprised of the beams (1) and (2) connected by rotating joints (7), (8), (9), (10) to the minor arms, (22), (23), (24), (25) which, in turn, are connected to the parallel shafts (3) and (4), with the distances between centers being equal to the distance between rotating joints of the beams; an actuator (14) is used to move standard weights (11) and (12), initially supported onto cavities (16), (17), (18) and (19) provided on the beams (1) and (2) of the parallelograms, until reaching the berths (30), (31), (32) and (33) connected to the weigh bridge (41) of the scale.

The load detector includes: first and second beam type load cells which are supported on first and second support bases in a cantilever manner to have free ends; and a mounting part on which an object is to be placed, which includes first and second connection parts connected to the first and second beam type load cells, and which is disposed between the first and second beam type load cells. The free ends of the first and second beam type load cells face opposite directions to each other in an extending direction of the first beam type load cell. The first and second connection parts of the mounting part are respectively connected to the first and second beam type load cells on a side of the free ends of the first and second beam type load cells.

The load detector includes: first and second beam type load cells which are supported on first and second support bases in a cantilever manner to have free ends; and a mounting part on which an object is to be placed, which includes first and second connection parts connected to the first and second beam type load cells, and which is disposed between the first and second beam type load cells. The free ends of the first and second beam type load cells face opposite directions to each other in an extending direction of the first beam type load cell. The first and second connection parts of the mounting part are respectively connected to the first and second beam type load cells on a side of the free ends of the first and second beam type load cells.