JPH03291533A - Weight selecting device - Google Patents

Abstract

PURPOSE:To enable highly reliable selective judgment by sending the weight value of an article which is calculated by a weighing part to a decision display part through a serial line. CONSTITUTION:The serial communication means 34 of the weighing part 22 is connected to the serial communication means 40 of the decision display part 23 through the serial line of current loop constitution. Then the weight calculat ing means 31 of the weighing part 22 calculates the weight of the article from weighing data stored in a weighing data memory 30, a linear correction data calculating means 32 calculates and stores linear correction data of a weighing sensor 15 from the weighing data, and a temperature correction data calculating means 33 calculates and stores temperature correction data of the sensor 15 from the output of an AD converter 27 and the weighing data. Further, the means 34 sends the article weight value calculated by the means 31 or receives a mode specification signal and a mode switching means 35 switches the opera tion of the weighing part 22 with the received mode specification signal. Then the decision display part 23 receives weight data and makes selective judgement within a permissible weight range.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Application Field of the Present Invention The present invention relates to a weight sorting device that measures the weight of articles carried onto a conveyor and performs sorting judgment based on the weight.

<Prior Art> On a production line, a weight sorting device shown in FIG. 5 has been conventionally used to sort articles by weight while conveying them on the line.

This weight sorting device 13 carries the article W carried out from the carry-in conveyor 1 onto the weighing conveyor 4, and sends the weighing signal from the weighing sensor 5 disposed to support the weighing conveyor 4 to the judgment control unit 6. Enter.

The determination control unit 6 includes a weight calculation means 7 that receives a weighing signal from the weighing sensor 5 and calculates the weight of the imported article, and determines whether the calculated weight is within an allowable range and responds to the determination result. The device is integrally constructed of a determining means 8 that outputs a determined determination signal, and a display means 9 that displays the determined result, and is mounted above the weighing conveyor 4, which is separate from the weighing sensor 5, so that the determined result can be easily viewed. It is located.

The articles carried out from the weighing conveyor 4 to the sorting conveyor 2 are carried out along a route according to the judgment signal from the judgment control l]na 6.

<8B to be solved> However, in the conventional weight sorting device as described above,
Since the analog signal from the weighing sensor 5 is output to the judgment control unit 6 located at a remote location, it is affected by high-level noise generated on the production line, causing heavy I errors and causing judgment errors. etc. were occurring.

In addition, this type of weighing sensor 5 individually exhibits changes in output due to temperature changes and linearity of output with respect to weight. For this reason, normally, while weighing articles of standard weight, correction data based on temperature and data for correcting linearity are stored in advance in the judgment control unit 6, and this correction data is used during actual sorting judgment. The weight is corrected using .

Weighing sensor 5 that is directly connected to the loading mechanism and has a mechanically short lifespan.
When replacing the camera, the various correction data that had been stored up to that point cannot be used, and all correction data must be retrieved again.

The present invention aims to provide a weight sorting device that solves this problem.

Means for Solving the Problems> In order to solve the above problems, the weight sorting device of the present invention uses a weighing section to determine the weight of the articles to be carried into the conveyor, and sends this weight value to the determination section to determine the weight of the articles to be carried into the conveyor. A weight sorting device that performs sorting and judgment of articles includes a weighing sensor that outputs a weighing signal corresponding to the weight of the articles carried into the conveyor, and a weighing sensor that outputs a weighing signal corresponding to the weight of the articles carried into the conveyor, and a plurality of calculation processes including weight ejection of the carried articles based on the weighing signal. serial overconfidence means that transmits the weight value of the carried-in article to the determination unit via a serial line and receives a signal for specifying the arithmetic processing of the performance storage unit via the serial line; A measuring section is comprised of these.

Therefore, the weight value of the incoming goods determined by the weighing section is
It is transmitted to the determination section via a serial line, and a selection determination is made based on the weight value.

Further, the arithmetic processing of the 21j brightness storage means is designated by a signal inputted via this serial line.

<Example of the present invention> Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a diagram showing the configuration of the weight sorting device @10 of the embodiment, and FIG. 2 is an external view of the weight sorting device @10 of the embodiment.

In FIG. 2, 11 is a base, 12 is a weighing conveyor placed above the base 11, and a support member 1 is placed from below.
Supported by 3.

The support member 13 supports the weighing case 1 mounted on the base 11.
It is supported by the weighing sensor 15 in 4.

Reference numerals 16 and 17 denote a light projector and a light receiver that are arranged opposite to each other on the carry-in side of the weighing conveyor 12, and detect the start of carrying articles into the weighing conveyor 12 based on the output of the light receiver 17.

An instruction housing 19 supported by a support column 18 erected on the base 11 is arranged above the weighing conveyor 12 .

The front surface of the instruction housing 19 is provided with a display 8 20 for displaying determination results, etc., and a plurality of operation keys 21.

FIG. 1 shows the electrical configuration of the measuring section 22 in the measuring case 14 and the determination display section 23 in the indicating case 19.

In FIG. 1, 25 is an AD converter that digitally converts the weighing signal from the weighing sensor 15, and 26 is the weighing case 1.
A temperature sensor 27 that detects the temperature inside the temperature sensor 26 is an AD converter that digitally converts the temperature signal from the temperature sensor 26.

Reference numeral 28 denotes a timing setting means, which causes the AD converter 25 to output the total Φf-t only during the measurement timing when a predetermined period of time has elapsed after receiving a signal from the light receiver 17 indicating that the article has been carried in.

29 is a zero correction means for subtracting and correcting the weight of the weighing conveyor 12 itself from the weighing data output from the AD converter 25, and 30 is a weighing data memory for storing the zero-corrected weighing data.

Reference numeral 31 denotes a weight calculating means for calculating the weight of the article based on the weighing data stored in the weighing data memory 30.

32 is a linear correction data calculation means that calculates and stores linearity correction data of the measurement sensor 15 based on the measurement data stored in the measurement data memory 30.

33 is a temperature correction data calculation means that calculates and stores temperature correction data of the measurement sensor 15 for temperature changes based on the output of the AD converter 27 and the measurement data.

Reference numeral 34 denotes serial overconfidence means for transmitting the article weight value calculated by the weight output means 31 or for receiving a mode designation signal.

Reference numeral 35 denotes mode switching means for switching the operation of the measuring section 22 in accordance with the mode designation signal received by the serial overconfidence means 34.

In addition, timing setting means 28, zero correction means 29, weighing data memory 30. Each calculation means 31 to 32 and mode switching means 35 are realized by one 8I processing device (microcomputer).

The serial overconfidence means 34 of the measuring section 22 is connected to the serial overconfidence means 40 of the determination display section 23 via a serial line having a current loop configuration.

41 determines whether the weight data from the weighing unit 22 is within a preset allowable weight range, and outputs a determination signal (bus signal, over signal, under signal, etc.) corresponding to the determination result. This is a sorting and determining means.

Reference numeral 42 denotes mode specifying means for specifying the operation mode of the measuring section 22 by operating the operation keys 21.

43 is a display device that displays a display screen corresponding to the operation mode specified by the mode specifying means 42! ! This is a display switching means for displaying on 20.

Next, the operation of this weight sorting device 10 will be explained.

For example, when the temperature correction mode is designated from the judgment display section 23, this designation signal is transmitted to the measuring section 22 via the serial line.
The temperature correction data calculation means 33 calculates that the temperature signal from the temperature sensor 26 is set to a predetermined value (for example, 0°C, 20°C, 4°C).
0”C) At 8, the weighing conveyor 12 is stopped.
Reads the weight value of the standard item placed above.

Assuming that the weighing data at this time is obtained as shown in FIG. 3 for the standard weight WO, the temperature correction data calculation means 33 calculates
Temperature correction data ΔK for the standard type IWO between is obtained by interpolation calculation and stored.

Next, when the linearity correction mode is designated, the linearity correction data calculation means 32 calculates the standard articles of different weights, such as WO,
The weight values when three types of standard articles, 2WO and 4WO, are sequentially placed on the stopped weighing conveyor 12 are read.

Assuming that the weighing data at this time is obtained, for example, as shown in (a> in FIG. 4), the correction data ΔL for the ideal characteristic (b) is calculated and stored for each weight value.

In this way, after each correction data is obtained by switching the mode and other setting data, zero correction data, measurement timing settings, etc. will be brought in.

The weighing signal from the weighing sensor 15 for this carried-in article is stored in the weighing data memory 30 only during the measurement timing.

The weight calculating means 31 calculates the weight value of the article based on this measurement data and each correction data (ΔT, Δ). This weight value is determined by the serial overconfidence means 34 on the judgment display section 23.
sent to.

The judgment display unit 23 receives this weight data and performs a sorting judgment on the allowable weight range, and the judgment result is displayed on the display unit @20 and a judgment signal is sent to the sorting conveyor 2.

As a result, the articles carried out from the weighing conveyor 12 to the sorting conveyor 2 are sent to the carrying out route according to the determination result.

<Other embodiments of the present invention> In the above embodiments, #j! After memorizing the data
! I was trying to calculate I, but while accumulating the weighing data sequentially, I calculated the average value! ! It may also be output as a tatami value.

<Effects of the Present Invention> As explained above, the superimposition sorting 'IAM of the present invention sends the weight value from the arithmetic storage means capable of performing a plurality of arithmetic processes including heavy heat calculation to the determination section via a serial line. Since the information is configured to transmit, even if the determination unit is far away, it is not affected by noise, etc., and highly reliable selection determination can be performed.

Further, since the correction data of the measuring section can be calculated and stored in advance using a designated signal from the outside, even if the measuring section is replaced, the work of resetting the correction data etc. can be omitted.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of one embodiment of the present invention, FIG. 2 is a perspective view showing the appearance of one embodiment, and FIGS. 3 and 4 are diagrams for explaining the operation of one embodiment. be. FIG. 5 is a diagram showing the configuration of a conventional device. 10-...Weight sorting@place, 12...Weighing conveyor, 14...Weighing housing, 15...
Weighing sensor, 22...Measuring section, 23...
・Judgment display section, 26...Temperature sensor, 30...
. . . Weighing data memory, 31 . . . Weight calculation means, 32 . . . Linear correction data calculation means, 33
...Temperature correction data calculation means, 34...
・Serial overconfidence means.

Claims (1)

[Scope of Claims] A weight sorting device in which a weight value of an article to be carried into a conveyor is determined by a weighing section, and the weight value is sent to a determination section to perform a sorting judgment on the article to be carried in. a weighing sensor that outputs a weighing signal corresponding to the weight of the article; a calculation storage means capable of performing a plurality of arithmetic processes including calculating the weight of the carried-in article based on the weighing signal; The measuring section is characterized by comprising serial overconfidence means for transmitting a value via a serial line and receiving a signal for specifying arithmetic processing of the arithmetic storage means via the serial line. Weight sorting device.