JPS58169699A - Quantity management system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a quantity control system that detects the presence or absence of objects stored in a warehouse, performs arithmetic processing, and displays the detected presence or absence.

Conventionally, in this (■) trace control system, the wiring to each sensor was either connected to the positive and negative power lines and the signal line for each sensor independently, or multiplex transmission was used to reduce the number of wiring. There are methods that can be used, but in the former method, the number of wires increases as the number of sensors increases, making construction difficult and expensive. To solve this problem, a method using multiplex transmission can reduce the number of wires, but it requires equipment for multiplexing, tooling, address verification functions, etc. unique to multiplex transmission, and these are expensive and are not economically advantageous. Must not be.

In view of the above problems, the present invention provides a wiring system that reduces the number of wiring lines without using special equipment for multiplex transmission, and is low in cost. It is provided by

Embodiments of the present invention will be described below with reference to FIGS. 1 to 10. Objects 1 whose presence or absence is to be detected are arranged in a grid pattern and are kept in stock. A sensor 2 is installed to detect the presence or absence of an object 1 corresponding to a unit position of one to several objects.An electric Si device, a central processing control unit (hereinafter referred to as CPU) 3, an output device, and a display. Connect the power line 5 and signal line 6 from the quantity control device 4, which is a device, to the sensor 2.The positive line of the electric wire is one for each horizontal row of the sensors 2 arranged above.This is connected. A plurality of lines are connected according to the number of columns.The negative side of the power supply line 5 is one line for every 4911 columns, and the feed connection is made.

Connect multiple lines according to the number of columns. Since the 0PU8ζ turns on the power supply line 5 sequentially on the positive side and the negative side in l:1 correspondence, the sensors 2 are turned on one at a time. On the other hand, the number of signal lines 6 varies depending on the method of use, but they are connected to the exhaust sensor 2 in a deenergized manner.

Since the sensors 2 are activated one by one, the response signals generated at that time must be received for each individual sensor 2.
The presence or absence of can be detected. Quantity tube 111i
At t4, the number is displayed on the display section 4b of the front panel 4a.

In addition, the occurrence of troubles such as disconnections and sensor failures can be displayed, and for maintenance purposes, the operation of any sensor 2 can be displayed on the display section 4b of the front panel 4a by inputting it to 0PU8 by operating the front keyboard 4C. . This quantity control device 4 can further be provided with an interface and connected to the main combination device, so that the quantity control device 4 can be used as a terminal.

Next, eleven embodiments of the signal line will be described. The signal line is connected to the sensor 2 as described above. The number of signal lines is the same as the number of states of the object l detected by the sensor 2. The state of object 1 is, for example, when objects 1 are stacked in multiple stages and sitting in the ground, when there is no object 1, or when they are stacked in 1 layer, 2 layers, 8 layers, etc., or detecting the quantity on 1 plane. When there is no object, there is one, there are two, 8
It means individual...etc.

As an example of providing signal lines in accordance with the number of states, when the number of states is four, each signal line becomes a sending wiring as shown in FIG. The relationship between the state of the object and the truth value of the signal is shown in the table below. In other words, no matter which of the four states of Hoka, one of the signal lines is at H level. Also, even if there is a disconnection in the middle of the route, the signal is set to H level. For example, if a disconnection occurs at a certain point xl or x on the line, this signal line will go to H level. . Here, depending on the state of the object mentioned above, the sensor status will be in the upper row of the table below, but due to the wire breakage, it will be in the lower row of the table below, which is contrary to the pre-setting that only one location or H level will be reached. It turns out that there is a disconnection. Furthermore, even if the H level of the disconnection and the R level of the state overlap, it is not clear at this point that it is a disconnection, but it will definitely indicate the roar of the object. When power is supplied to a sensor whose H level is different from that of the wire breakage, the two signal lines become H level, so the wire breakage becomes clear.

The above method is to match the number of signal lines with the number of signal lines.
In the case of Shiki, 2 lines represent 4 states, and in the case of 8-shape moss, 8 lines represent 8.
A method of using a binary one-sided system to express the state as shown in the table below,
A method of providing a parity check line for this, or a method of providing a parity check line, or a sixth
It is also possible to use a method using pulses as shown in the figure, or a method in which each of the signal lines in FIG. 7 is used as a linear output.

Next, an embodiment will be described in which the sensor 2 is an ultrasonic transducer 2. The ultrasonic transducer 2 detects the oscillation state. In the method using ultrasonic waves, if the sensors 2 are activated at the same time, the reflected waves oscillated by the adjacent sensors 2 will enter one sensor 2, resulting in false detection. There are no waves.

For the objects that are arranged in a plane on a plane, a sensor is installed above every one to several objects to detect the presence or absence of the object, and a power line from the quantity control device is connected to the sensor. The two poles of each sensor are wired in a matrix to supply power, and the output signal lines of each sensor are sent and connected to the management device, and the power supply ends of the matrix wiring are sequentially connected to sequentially supply power to the sensors. The quantity control system is characterized in that each output signal is processed by a microcomputer and the quantity of the object is displayed.This system does not require special equipment for multiplex transmission and is therefore inexpensive and requires fewer wiring lines. At the same time, when installing a large number of sensors, power supply is sometimes supplied to the sensors one by one, so the power supply capacity,
Only 14 minutes of supply and sensor is required and the energy saving effect is large. Further, since the sensors usually work in units of III, there is no adverse influence from adjacent sensors that may cause false detection, and all sensors can be the same, which is effective in terms of reliability and maintenance costs.

[Brief explanation of the drawing]

1 to 8 show embodiments of the present invention, in which simplified Fig. 1 is a perspective view showing the relationship between an object and a sensor, Fig. 2 is a wiring diagram of the sensor, and Fig. 8 is a perspective view of a quantity control device. Figure 4 is a wiring diagram of the signal line, Figures 5 (M) and (B) are wiring diagrams of other embodiments,
FIG. 6 is a time chart for the pulse method, FIG. 7 is a connection diagram for the linear method, and FIG. 8 is a perspective view using an ultrasonic transducer. 1--Object 2--Sensor 2-Ultrasonic transmitter/deliverer 8-Central processing control unit (CPU) 4-Quantity control device 5-Electric wire 6-Signal line Patent application agent Jinneshita Denko Co., Ltd. Private patent attorney Toshimaru Takemoto (and 2 others) 30 5 1i11!1 Figure 2 4121 □□□-1 'l56Ii2) No. 70 2

Claims (1)

[Claims] l) For objects arranged on a plane, a sensor is installed above every one to several objects to detect the presence or absence of the object, and the sensor is connected to a quantity control device. Both poles of the power supply line are wired in a matrix separately to supply power, and the output signal line of each sensor is sent and connected to connect to the management device, and the power supply ends of the matrix wiring are sequentially connected to the sensor. A quantity control system that displays the quantity of objects by sequentially supplying power and processing each output signal using a micro combinator. 2) The quantity control system according to claim 1, wherein the number of output signal lines for sending and connecting each sensor is the same as the number of states of an object detected by the sensor. 8) Claim 1 in which the sensor is an ultrasonic transducer
! Section III or #I! ! Quantity control system described in section.