JPS60183526A - Monitoring device for liquid level detection - Google Patents

Abstract

PURPOSE:To improve the reliability of a device by calculating a liquid-level rise rate per unit time from a flow rate signal and the horizontal sectional area of a container and comparing it with a liquid level rise rate obtained by a liquid level detection sensor, and operating an emergency countermeasure means when the error exceeds a permissible value. CONSTITUTION:When the liquid level rises while a motor-driven inflow valve 4 is fully open and a motor-driven discharge valve 11 is closed, a liquid level monitoring controller 10 inputs a pulse signal proportional to a flow rate which is sent from a flow rate sensor 3 to calculate the inflow (s) per unit time of the container 1 and also calculates u=s/a obtained by dividing the inflow (s) by the sectional area (a) of the container 1, i.e. the liquid level rise rate per unit time. Then, the liquid level l detected by a liquid level detection sensor 5 is divided by time (t) to obtain a liquid level rise rate (k) per unit time and (u) and (k) are compared with each other all the time; when the difference exceeds the permissible value, it is judged that a liquid crystal detecting element is abnormal, and a warning is generated to operate the emergency countermeasure means.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an automatic monitoring arrangement for monitoring malfunctions of liquid level detection devices in liquid bathtubs, general household bathtubs, and the like.

Conventional Structures and Problems Conventionally, there have been devices that store liquids such as oils and dyes in tanks, monitor the liquid level with a liquid level detector, and automatically supply and demand the liquid by remote control.

In addition, in particular, it is also used in bathtubs in ordinary homes.
There is a device that detects the water level in a bathtub, such as the one disclosed in Japanese Patent No. 24. These devices have mainly been configured to remotely control the supply and demand of liquid using a liquid level detection device, or to automatically heat the stored liquid using a heating device.

In this case, if the liquid level detection device malfunctions, there is a possibility that an extremely dangerous situation such as liquid overflow or empty bathtub may occur.

OBJECT OF THE INVENTION The present invention solves the above-mentioned problems of the conventional technology. If you know the IC, stop the automatic operation (2 and (4), and improve the reliability of the liquid level source device, and 6).

In order to achieve the goal of "starting" (14th generation 1-fIe f1, the main development [jJ-]
Liquid level detection and monitoring device 16''O The liquid level detection sensor that detects the liquid level, θi, fi: Wi
The flow rate signal from the sensor and the liquid level detection sensor from the sensor are manually controlled from 1 to d11 using the value of the cross-sectional area of the container.
The liquid level rise rate obtained from the liquid level detection sensor is compared with the liquid level rise rate obtained from the liquid level detection sensor, and if the error exceeds the allowable value, an alarm is issued. A liquid level monitoring controller is installed to operate the emergency measure for shutting down the operation. The level monitoring controller counts pulses etc. proportional to the flow rate from the flow rate sensor17 and calculates the rate of increase in the level using the cross-sectional area of the container, and calculates the error rate for each level from the level detection center by 4<. If this error exceeds the allowable value, the reliability of the entire night crying device is increased by taking emergency measures.

DESCRIPTION OF ACTUAL JX+I EXAMPLE Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 4.

In FIG. 1, a container 1 whose horizontal cross-sectional area is approximately constant has the following properties:
Connect the flow rate sensor 3 and liquid flow port to the inflow vibrator 2.
The liquid is connected so that (Fj) flows in through the electric valve 4.

Further, a liquid level detection sensor 5 for detecting the liquid level in the container is attached to the container 1. As shown in FIG. 2, this liquid level detection sensor →)-5 has floats 7 having magnets 6 arranged therein at predetermined intervals inside a cylinder 11. , n: When r-7 received 47 forces in the liquid and floated to a certain position using the float support J'j + metal fitting 8,
A reed switch 9 is connected to receive the magnetic force of the shaft 16 inside the float 7 and to detect the liquid level.

sI:,, (rζ, to'1,1 In figure 71..., the liquid level in container 1 is 'rr'n.
0 gives the predetermined control/-kens, B;
An electric outflow valve 11 is connected.
4-Nontrosi 10 outside as shown in Figure 3! I'
3 (and a digital display section 12 indicating the liquid level in the container)
, change the flow rates of the electric inflow valve 4 and the electric outflow valve 11
It consists of a buzzer 14 that notifies you of an abnormality, an abnormality display section 15, and a power switch 16.

Note that the cross-sectional area of the container 1 is roughly determined by the liquid level ', 11+: 1, 1 and t1 controlled by a switch (not shown) on the back of the visual core 10. Doru C
Connected to PU (Central Processing Unit).

Consider the case where the above configuration is -1... and is operated with the control dunce shown in FIG. The liquid level in the container rises over time - J7. In the positive order k, the electric inflow valve 4 is fully open and the electric outflow valve 11 is closed IF. The opposite case is the negative slope m (m=-k). In the case of normal operation, the liquid level monitoring controller 10 receives the flow rate θ from the flow rate sensor 3 at the part of the slope k.
Input the pulse signal etc. with ir, , p-i, V, ζ ratio i'z11, and calculate the inflow amount S
Calculate. Next, reveal the 6fi-person 111S of ξ.

It's set up, it's the 1st part of the device 1.
] tsu/ko 1 straight u (++-= s / a), that is, li'I, Gn 1)' Liquid fi sink 1 rate I C blue per space.

((Detected by the position detection sensor 5 (This change in the rear position l is the old F4))
Tsuta value k (k=e/L), that is, 1 white carving or 7.1lIL
It is the rate of rise in liquid level per unit time. 1 (
are always compared, and if these two; direct error ξ(E-11
1() or pre-set 8f(-Wl-over/
(If -, there is an abnormality in the liquid level detection t1-4 component (therefore 1jj
i'i) and 4), the print 11 no 1 goes off, and the buzzer 14, which is used to notify an abnormality, appears.X'7;! 9) At the same time as operating the abnormality display section 15 to display the following information, depending on the situation, for example, which one of the detected liquid levels is detected? 1i7j tan time (
1max)'s i = "+ has reached 1~/In this case, supply liquid to container 1/-gens!';', tl-shake, 5:j1, operate countermeasures. 1, fJ]': = Where, the movement of the rear detection sensor 5 1/l, wo, flow: 1 (-Secondary monitoring by the sensor 3 If an error occurs in the two liquid level rise rates that exceeds the allowable value due to the Improves the ability to attract people.

In addition, when the liquid stored in a container is applied to a device that controls power (1 heat: Ii), for example, in the case of an automatic bathtub heating device in a general private garden, it is possible to heat the bathtub dry, overflow the hot water, etc. It is possible to avoid extremely dangerous situations such as this and situations that result in a loss of energy.

Looking at the effects of the invention, the present invention's (11th place detection and monitoring device) plate is as follows: 1. Liquid flows into a container with a nearly constant horizontal cross-sectional area that stores liquid/It is installed in the inflow pipe of the container. a flow rate sensor;
"A liquid level detection sensor that detects the liquid level of IF f+'H,
Input the flow A signal from the i sensor and the enemy position information from the liquid level detection sensor, calculate Compare and judge the calculated liquid level rise rate with the liquid level rise rate obtained from the liquid level detection sensor,
If the error exceeds ¥1 volume and 1 night, = report or emergency i.
3F, 1iz, liquid level that activates non-7i countermeasures such as stop! Due to the 1itj celebration/troller, the liquid level + ordinal i': 'i's X is always 1. :; Congratulations on J1, when an abnormality occurs, take appropriate emergency measures such as reporting the situation and stopping emergency operations./Kome, Pilot [! By applying 11.11.

[Brief explanation of drawings]

Figure 1 is an example of liquid level detection'! it+
:Illumination of the visual device! II l: fi side view, 2nd figure id 1st
Enlarged sectional view of part DA in Figure 3.
Fig. 4 is a diagram showing an example of 1i11 lj/-Koons by liquid M monitoring method r-1-ra. 1... Capacity z);, 2...Inflow amount, 3...〃
j; Hanging IY sensor, 5...Liquid level detection sensor, 10...
Liquid level monitoring control “l-ra, 14, free--115
... Abnormality display section. Name of representative JJlj person: Patent attorney Satoshi Nakahekake (Sword and 1 other type 1 Figure 2)

Claims (2)

[Claims] (1) A container with a substantially constant horizontal cross-sectional area for storing liquid, an inflow pipe for flowing the liquid into the container, a flow rate sensor for detecting the flow rate of the inflow pipe, and a flow rate sensor attached to the container. A liquid level detection sensor that detects the liquid level in a container installed at The liquid level rise rate per unit time is compared with the liquid level rise rate detected by the liquid level detection sensor, and if the error exceeds the allowable value, emergency measures such as an alarm and emergency operation stop are activated. A liquid level detection and monitoring device having a liquid level monitoring controller. (2) Emergency measures include warning devices such as buzzers,
The liquid level detection and monitoring device according to claim 1, which uses a display device such as a red lamp or an LED, or an emergency stop device for automatic liquid supply.