CN203480250U

CN203480250U - Resistance-type controller

Info

Publication number: CN203480250U
Application number: CN201320597683.4U
Authority: CN
Inventors: 王晛
Original assignee: SUZHOU GP ENTERPRISES CO Ltd
Current assignee: GP Enterprises Co Ltd
Priority date: 2013-09-26
Filing date: 2013-09-26
Publication date: 2014-03-12
Anticipated expiration: 2023-09-26

Abstract

The utility model relates to a resistance-type controller including a control circuit, a relay switch circuit, a high water level detection circuit, a low water level detection circuit, and a transformer circuit. The control circuit is electrically connected with a probe, the probe is grounded, the control circuit sends positively and negatively alternated pulse signals to periodically change the polarity of the probe, the relay switch circuit is electrically connected with the motor of a pumping device, the high water level detection circuit and the low water level detection circuit are electrically connected with the probe, the transformer circuit supplies power to the MCU circuit, the high water level detection circuit and the low water level detection circuit, the MCU circuit sends pulses to the high water level detection circuit and the low water level detection circuit, the water level resistance information of the high water level detection circuit and the low water level detection circuit is fed back to the MCU circuit, and the MCU circuit controls the on and off the relay switch circuit. The resistance-type controller is high in electrochemical corrosion resistance capability and long in service life.

Description

A kind of resistance-type controller

Technical field

The utility model relates to a kind of improvement of water-level control apparatus, refers in particular to a kind of electrochemically resistant corrosive power strong, the resistance-type controller of long service life.

Background technology

In industrial sensor the inside, have various switches, contactless have a condenser type, inductance type, and hall sensing, optoelectronic switch etc., they are all the existence of inspected object in the situation that not contacting measured object.These switches can be seen in place in many robotizations, they are compared with traditional position switch, have many advantages, and a lot of place is the switch that can not directly use traditional type, resistance-type switch is also that industrial sensor the inside is simply a kind of, general test conducting liquid.During beginning, a lot of producers all carry out tracer liquid with direct current, but they have found with rear electrode after a while with regard to electrolytic corrosion.Just using afterwards alternating current instead detects, after experiment shows to use instead alternating current, the life-span can extend really greatly, but they mostly run into a problem of how to take out ac signal when design, guarantee positive-negative half-cycle is taken out electric current how about the same, technical being not difficult, but also more tired, and can more costs.Have a lot of major companies all releasing new-type switch--inductive switch, the mode of electricity consumption detects the position of liquid level; Inductive switch has two kinds at present, and a kind of is probe-type electronic switch, and a kind of is capacitance-type switch; Capacitance-type switch need be used special chip, and cost is higher; Probe-type electronic switch is at present due to problems such as ageing of electrodes, not universal, and the heat-shrinkable T bush of probe does not have the effect of insulation after expanding with heat and contract with cold.

Utility model content

The utility model object is in order to overcome the deficiencies in the prior art, to provide a kind of electrochemically resistant corrosive power strong, the resistance-type controller of long service life.

For achieving the above object, the technical solution adopted in the utility model is: a kind of resistance-type controller, comprises control circuit, relay switching circuit, high water stage detection circuit, low-water level detection circuit, transformer circuit; Described control circuit is electrically connected to probe, described probe ground connection, and described control circuit sends the pulse signal of positive and negative alternation, the polarity of periodic variation probe; Described relay switching circuit is electrically connected to the motor of water plug, in order to control opening or closing of motor; Described high water stage detection circuit, low-water level detection circuit are electrically connected to probe respectively; Described transformer circuit is respectively to MCU circuit, high water stage detection circuit and the power supply of low-water level detection circuit; Described MCU circuit is to high water stage detection circuit and low-water level detection circuit transmitted, high water stage detection circuit and low-water level detection circuit feed back to MCU circuit by the water level resistance information of detection, and by the break-make of MCU circuit control relay on-off circuit, to realize the control to the duty of water plug.

Preferably, described probe is made by stainless steel.

Preferably, on the excircle of described probe, be provided with trombone slide advanced in years.

Due to the utilization of technique scheme, the utility model compared with prior art has following advantages:

Resistance-type controller described in the utility model, described control circuit is electrically connected to probe, and control circuit produces pulse signal, to realize the polarity of probe, exchanges, and effectively improves the electrochemically resistant of probe and learns corrosive power; Meanwhile, probe adopts stainless steel to make, and is provided with trombone slide advanced in years on the excircle of described probe, can effectively extend the serviceable life of probe in order to insulation.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, technical solutions of the utility model are described further:

Accompanying drawing 1 is the fundamental diagram of resistance-type controller described in the utility model;

The front view of the probe assembly that accompanying drawing 2 is used for resistance-type controller described in the utility model;

Wherein: 1, probe; 2, step the pipe of helping pull a cart.

embodiment

Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.

Accompanying drawing 1-2 is a kind of resistance-type controller described in the utility model, comprises control circuit, relay switching circuit, high water stage detection circuit, low-water level detection circuit, transformer circuit; Described control circuit is electrically connected to probe, described probe ground connection, and described control circuit sends the pulse signal of positive and negative alternation, the polarity of periodic variation probe; Described relay switching circuit is electrically connected to the motor of water plug, in order to control opening or closing of motor; Described high water stage detection circuit, low-water level detection circuit are electrically connected to probe respectively; Described transformer circuit is respectively to MCU circuit, high water stage detection circuit and the power supply of low-water level detection circuit; Described MCU circuit is to high water stage detection circuit and low-water level detection circuit transmitted, high water stage detection circuit and low-water level detection circuit feed back to MCU circuit by the water level resistance information of detection, and by the break-make of MCU circuit control relay on-off circuit, to realize the control to the duty of water plug.In the present embodiment, described probe 1 is made by stainless steel; On the excircle of described probe 1, be provided with and step trombone slide 2.

Below be only concrete exemplary applications of the present utility model, protection domain of the present utility model is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, within all dropping on the utility model rights protection scope.

Claims

1. a resistance-type controller, is characterized in that: comprise control circuit, relay switching circuit, high water stage detection circuit, low-water level detection circuit, transformer circuit; Described control circuit is electrically connected to probe, described probe ground connection, and described control circuit sends the pulse signal of positive and negative alternation, the polarity of periodic variation probe; Described relay switching circuit is electrically connected to the motor of water plug, in order to control opening or closing of motor; Described high water stage detection circuit, low-water level detection circuit are electrically connected to probe respectively; Described transformer circuit is respectively to MCU circuit, high water stage detection circuit and the power supply of low-water level detection circuit; Described MCU circuit is to high water stage detection circuit and low-water level detection circuit transmitted, high water stage detection circuit and low-water level detection circuit feed back to MCU circuit by the water level resistance information of detection, and by the break-make of MCU circuit control relay on-off circuit, to realize the control to the duty of water plug.

2. resistance-type controller according to claim 1, is characterized in that: described probe is made by stainless steel.

3. resistance-type controller according to claim 1 and 2, is characterized in that: on the excircle of described probe, be provided with trombone slide advanced in years.