Three-ring solid-state probe for detecting water level in sump pit of urban pipe gallery

Abstract

A three-ring solid-state probe for detecting the water level in a sump pit of an urban pipe gallery comprises a substrate, three-level induction rings, and a three-ring induction detection motherboard. The three-level induction rings include a first-level induction copper ring, a second-level induction copper ring and a third-level induction copper ring which sleeve the outer surface of the substrate in sequence from top to bottom. The three-ring induction detection motherboard, which is arranged inside the substrate, includes a detection integrated circuit and a single chip microcomputer. Three groups of independent capacitive sensing lines are arranged in the detection integrated circuit. The three groups of independent capacitive sensing lines correspond to the three-level induction rings in a one-to-one manner at the front end, and are connected with the signal inlets of the single chip microcomputer at the rear end. The signal outlet of the single chip microcomputer is connected with a control device for controlling start and stop of a drainage device. The probe has a round and smooth appearance. The outside parts are all prepared from A-grade pure PTFE. The inside is fixed by screws and then cured by pouring polyurethane. Thus, a solid-state probe with stable performance is formed. The probe is novel in design, can be used to detect the level and rising trend of water in a sump pit of an urban pipe gallery, and is of very high reliability.

Description

technical field [0001] The invention relates to a three-ring solid-state probe for detecting sump pits of urban utility corridors, and belongs to the technical field of detection and control of sumps of urban utility corridors. Background technique [0002] At present, in terms of water level detection and control of sump pits in urban pipe corridors at home and abroad, float-type water level switches are generally used to detect water level information, and then use the measured water level information to control the start and stop of drainage pumps to achieve water level control. Automatic control of puddle water level. The float type water level switch is to push the float through the buoyancy, and then directly push the dry reed switch through the float. The float type water level switch has the following defects: 1. When the water flow in the sump is sharp, the float moves repeatedly at high frequency, which easily makes the reed switch inside the float fail; 2. The co...

AI Technical Summary

Problems solved by technology

The float type water level switch has the following defects: 1. When the water flow in the sump is sharp, the float moves repeatedly at high frequency, which easily makes the reed switch inside the float fail; 2. The composition of the groundwater in today’s cities is very complicated, and the floating Attachments, dirt and chemical pollutants may become obstacles to the floating ball, so the float-type water level switch used to detect the water level of the sump of the urban utility gallery often fails; 3. The float-type water level The core component of the switch is the dry reed switch, which is a contact switch. The best quality is military supplies. However, even the top-quality products in military supplies have a limited mechanical life of only 2E+07 times. In addition, The device also has occasional failures and is prone to dead failures

These detection methods are relatively complicated, and have the disadvantages of high cost and many interference factors.

[0004] It can be seen from this that the existing water level detection technology has its limitations, and none of them can fully meet the monitoring requirements for the water level of the urban utility gallery sump.

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