CN2164558Y

CN2164558Y - Automatic monitoring and measuring alarm device

Info

Publication number: CN2164558Y
Application number: CN 93212681
Authority: CN
Inventors: 金世欣
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-18
Filing date: 1993-05-18
Publication date: 1994-05-11
Anticipated expiration: 2003-05-18

Abstract

The utility model relates to an automatic monitoring alarm device. Two parallel metallic electrode sheets are used as sensing elements outside a container. The container and the material in the container are used as conducting media. The amount change of the material is monitored, the capacitance change is induced, and the whether the monitored material needing replenishing or not in time is determined. A medium selection circuit can be used to set the value of the capacitance of a trigger load. Once the monitored material in the device reaches the set value at which the material must be replenished, the load can be automatically started to replenish the material in time and send out alarm signals.

Description

Automatic monitoring and measuring alarm device

The utility model relates to a kind of automatic monitor alarm device.

The industrial development of countries in the world now is swift and violent, and many industrial processes all trend towards robotization.Be typically provided with storage container, must be with various materials (as: liquid state, liquid, powder, particle ...) machine (as steelworks, pharmaceutical factory, hospital, water tower etc.) of filling all needs manually-operated control, present resources of human talents is in short supply day by day and man-hour is expensive, use manually-operated both inconvenient, uneconomical again, also can work be incured loss through delay and even heavy losses because of human negligence is easy to generate error.

The purpose of this utility model provides a kind of device that can monitor the fill material changing condition in the above-mentioned storage container automatically and the alarm indication takes place.

The utility model selects circuit, detecting circuit, amplifying circuit and phase place to select output circuit to form by sensing element, oscillatory circuit, medium, it is characterized in that sensing element is arranged on monitored outside of containers, utilizing the characteristic of capacitor, is conducting medium with the material in this container and the container; This sensing element serves as to trigger the oscillatory circuit that element produces the alternating-current pulse signal to link to each other with one with it, and this oscillatory circuit selects circuit to link to each other with medium that can adjusting gear sensitivity, and medium selection circuit is connected with a detecting circuit again; When the electric capacity of sense element senses generation reaches setting value, can trigger oscillatory circuit and produce interchange continuous impulse signal, this signal selects circuit to enter detecting circuit through medium, and be detected circuit conversion and become to enter behind the direct current signal amplifying circuit signal is amplified, amplifying circuit selects output circuit to link to each other with the phase place that can make output signal be controlled to be positive or negative output, and this phase place selects the output terminal of output circuit can connect load.

The utility model is that sensing element is arranged on monitored outside of containers, utilize the characteristic of capacitor, with the material in container and the container is conducting medium, and be monitored object with the material in this container, after the quality of this material changes (promptly increase or reduce), just by two parallel induction metal plates by its electric capacity change and sensitivity, nationality helps medium to select circuit to set and triggers the electric capacity size that starts again, in case the monitored material in the container reaches when needing additional setting value, this device perhaps replenishes new material with regard to starting load and alarm in container.This device construction Nover practical, realize robotization control and operation fully, and promote effect.

Below in conjunction with drawings and Examples, introduce the utility model in detail.

Fig. 1 is a circuit diagram of the present utility model.

Fig. 2 is the utility model embodiment synoptic diagram.

Consult Fig. 1: the utility model mainly includes sensing element 1, oscillatory circuit 2, medium selection circuit 3, detecting circuit 4, amplifying circuit 5 and phase place and selects parts such as output circuit 6.Wherein include sensing element 1 in the oscillatory circuit 2, this sensing element 1 is made up of two parallel metal electrode films 7.When this two metal electrode film 7 is pasted on the vessel surface that is loaded with material within it, can constitute a capacitor C(capacitor specific characteristics), sensing element 1 in the oscillatory circuit 2 combines with all resistance R 1, R2, R3 and constitutes a RC oscillator, produce interchange continuous impulse signal as oscillation source, and can change capacitance values because of the change of the inventory in the container, thereby produce various oscillator signal.

Oscillatory circuit 2 also is to select circuit 3 to be connected by the RC circuit in conjunction with the medium that constitutes with one, be equipped with a variable resistor R7 in this circuit, can suitably adjust the sensitivity of this device by variable resistor R7, also the different capacitance value that make the device conducting of setting of electric capacity that promptly produced according to different medium (filler).The electric capacity that produces when sensing element 1 place induction equals medium when selecting electric capacity that circuit 3 sets, and the alternating-current pulse signal that oscillatory circuit 2 places produce just is triggered away.

Medium selects circuit 3 to be connected with detecting circuit 4, is equipped with an amplifier U1 and a commutation diode D in the detecting circuit 4, and like this, the interchange continuous impulse signal that oscillatory circuit 2 is exported is converted into the signal of dc waveform here.

Detecting circuit 4 links to each other with the amplifying circuit 5 that mainly is made of amplifier U2, U3, U4, and above-mentioned dc waveform signal is amplified signal by amplifying circuit 5 at this.Amplifying circuit 5 selects output circuit 6 to link to each other with a phase place, this phase place selects output circuit can make output signal switch to positive or negative output, and can establish load 8 in the output termination of this circuit 6, with starting load 8 alarms or to replenishing monitored material in the container.Q1, Q2 are transistor among the figure, and VCC is a power supply.

Consult Fig. 2, the utility model 10 is provided with (Pasting) on the lateral surface of monitored container 11, nationality helps sensing element 1 to be combined in can constitute a capacitor on the container that material is housed, by combining of this capacitor and resistance, form one produce the alternating-current pulse signal oscillatory circuit 2, owing to be that material with 11 li in container 11 and container is as conducting medium, nationality helps 7 pairs of containers 11 of two parallel metal electrode slices of sensing element 1 and the material in the container to produce induction, the material that container is 11 li just becomes monitored object, when the quantity of monitored material during in the variation that container takes place to increase or reduce, the electric capacity that the sensing element 1 that is made of parallel metal electrode slice 7 is responded to also changes thereupon, the electric capacity that produces when induction reaches that medium selects that circuit 3 sets can promote the capacitance value of load 8 time, will starting load 8, the material in the container is replenished or the alarm indication takes place.

Claims

1, a kind of automatic monitor alarm device, include sensing element, oscillatory circuit, medium selection circuit, detecting circuit, amplifying circuit and phase place and select output circuit, it is characterized in that: sensing element is arranged on monitored outside of containers, utilizing the characteristic of capacitor, is conducting medium with the material in this container and the container; This sensing element serves as to trigger the oscillatory circuit that element produces the alternating-current pulse signal to link to each other with one with it, and this oscillatory circuit selects circuit to link to each other with medium that can adjusting gear sensitivity, and medium selection circuit is connected with a detecting circuit again; When the electric capacity of sense element senses generation reaches setting value, can trigger oscillatory circuit and produce interchange continuous impulse signal, this signal selects circuit to enter detecting circuit through medium, and be detected circuit conversion and become to enter behind the direct current signal amplifying circuit signal is amplified, amplifying circuit selects output circuit to link to each other with the phase place that can make output signal be controlled to be positive or negative output, and this phase place selects the output terminal of output circuit can connect load.

2, automatic monitor alarm device as claimed in claim 1 is characterized in that: described sensing element is made up of two parallel metal sheets.

3, automatic monitor alarm device as claimed in claim 1 is characterized in that: described medium select circuit can be according to the electric capacity of the fill material of the different medium of placing in the container and generation that sensing element is responded to the different capacitance value that make the device conducting of setting.