JPH01299420A - Measuring apparatus of weight of swinging matter - Google Patents

Abstract

PURPOSE:To measure a weight of a swinging matter simply and accurately, by computing a mass value from the quotient of an acceleration value outputted by an accelerometer and a measured value outputted by a weight meter, and by multiplying the mass value by a coefficient of acceleration of gravity, so as to compute the weight. CONSTITUTION:A weight meter 10 and an accelerometer 11 are of an electronic type and output the signals of voltage or current values corresponding to a measured value W' of the weight of a matter to be measured and a measured value DELTAg of a fluctuation acceleration respectively. In an arithmetic circuit 12, subsequently, a mass value is computed from the quotient of an acceleration value obtained by adding a coefficient of acceleration of gravity to the fluctuation acceleration DELTAg of a swinging matter outputted from the accelerometer 11 and of the measured value W' outputted from the weight meter 10. Then, a weight value W of the swinging matter is computed from the product of the mass value and the coefficient of acceleration of gravity. The weight value W calculated in the circuit 12 is displayed digitally in a display unit 13 and printed out by a printer 14. By this method, an exact weight of the swinging matter can be measured simply.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention is applicable to a rocking device that weighs an object to be weighed in a rocking place or state, such as on a small boat or a crane. The present invention relates to a weighing device.

(b) Conventional technology Conventionally, it has been difficult to measure weight in a rocking place, such as on a small ship, due to fluctuations in gravitational acceleration caused by the rocking. The value was read and used as the measurement value.

(c) Problems to be solved by the invention As a result, reading the scale is difficult, time-consuming, and inaccurate, resulting in a difference between the measured value and the measured value at a place where there is no shaking such as on land, which can lead to trouble. It was the cause.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a weight measuring device for a swinging object that can accurately weigh the weight of an object to be weighed in a swinging state.

(d) Means for Solving the Problems This invention provides a weighing scale that measures the weight of a rocking object during rocking, an accelerometer that measures the acceleration of the rocking object, and an acceleration value output from the accelerometer. an arithmetic circuit that calculates the mass value of the rocking object by the quotient of the weight value and the weight value output from the weight scale, and calculates the weight value of the rocking object by the product of this mass value and the gravitational acceleration coefficient; The present invention is characterized in that it is a weight measuring device for a rocking object, comprising a display means for displaying an output weight value of the rocking object.

(E) Function The device for measuring the weight of a rocking member of the present invention calculates the mass value of the rocking member by the quotient of the acceleration value output from the accelerometer and the measured value output from the weight scale, and calculates the mass value of the rocker. By calculating the weight value of the rocking object by multiplying it by the gravitational acceleration coefficient, it is possible to measure the weight after removing weight fluctuations due to rocking, and this measured value is displayed on the display means.

(/\) Effect of the invention As a result of the above, according to the present invention, for example, on a small boat,
Or, even if a heavy plate of the object to be weighed is weighed in a rocking place or state, such as with a crane, the accurate weight of the rocking object cannot be determined in the same way as when it is weighed in a non-rocking place or state, such as on land. can.

(g) Examples An embodiment of the present invention will be described in detail below based on the drawings.

The drawing shows a block diagram of the rocker weighing device, and the first
The weight measuring device shown in the figure includes a weight scale 10 and an accelerometer J1.
, an arithmetic circuit 12 , a display 13 , and a printer 14 .

- The above-mentioned weighing scale 10 is an electronic type and outputs a signal of a voltage value or a current value corresponding to the measured value W- of the weight of the object to be weighed, and furthermore, the accelerometer 11 is also an electronic type. , outputs a signal of a voltage value or a current value corresponding to the variable acceleration value Δg of the variable acceleration of the object to be measured.

Further, the arithmetic circuit 12 described above performs the following arithmetic processing based on each of the above-mentioned signals.

In other words, the weight W of the rocking object to be weighed is calculated by adding the gravitational acceleration coefficient <9.81> to the fluctuating acceleration value Δg of the rocking object output from the accelerometer 11, resulting in an acceleration @(9,8
1+Δg) and the weight value W output from the weight scale 10
-, the mass value of the rocking object (W-/・ (9,81+
Δg)) and calculate this mass value (W”/(9,81+Δ
g)) and the gravitational acceleration coefficient (9, 81,) to calculate the weight value W of the rocking object.

That is, the equation W=9.81 xW-/(9,81+Δg) is established, and the arithmetic circuit 12 processes the above equation.

Note that the arithmetic processing of the arithmetic circuit 12 described above reads and periodically processes the signal of the weight value W- of the weight scale 10 and the signal of the fluctuating acceleration value Δg of the accelerometer 11 at a constant fast cycle. A signal of value W is repeatedly output.

Then, the display 13 displays the weight value W calculated by the above-mentioned arithmetic circuit 12, for example, as a digital value, and the printer 14 prints the weight value W on paper such as a slip.

By configuring the weight measuring device in this way, it is possible to read the weight of the object to be weighed while the object is swinging, with the influence of the swing removed.

FIG. 2 shows a case where an object to be weighed 18 is weighed by a crane 17 installed on a ship 16 using the rocking weight measuring device 15 configured as described above, and the object to be weighed 18 is weighed by the weighing device 15. 15 and is moved up and down by a crane 17.

In this case, to be weighed! P! The rocking direction of 11118 is the vertical direction, and the fluctuation acceleration value Δg of the acceleration due to this rocking is
``A change in one direction appears in a positive direction, and a change in a downward direction appears in a negative direction.

However, even if the fluctuating acceleration value Δg appears in a positive direction or a negative direction, it cannot be measured! Since the mass of PIIJ18 is determined and then its weight is calculated, an accurate weight value W can be obtained.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, Figure 1 is a block diagram of the weighing device. FIG. 2 is an explanatory diagram showing how the weighing device is used.

Claims (1)

[Claims] (1) A weighing scale that measures the weight of the rocking object during rocking, an accelerometer that measures the acceleration of the rocking object, and an acceleration value output from the accelerometer and a weight value output from the weighing scale. An arithmetic circuit that calculates the mass value of the rocking object using the quotient and calculates the weight value of the rocking object from the product of this mass value and the gravitational acceleration coefficient, and a display that displays the weight value of the rocking object that is output from the calculation circuit. A rocking object weighing device comprising means.