A guide robot includes a lower module includes a wheel and a motor provided inside the lower module, and an upper module disposed at an upper portion of the lower module and including a trash can assembly and a display unit. The upper module includes a body part coupled to the upper portion of the lower module and a head part rotatably coupled to an upper portion of the body part. The body part includes a front case forming a front outer appearance of the body part and including the trash can assembly provided inside the front case, and a rear case forming a rear outer appearance of the body part and including the display unit. A garbage insertion part is provided at a portion of the front case corresponding to an upper portion of the trash can assembly to insert garbage into the trash can assembly.

A water level detection device capable of preventing water from overflowing due to a bumping phenomenon or excessive number of cooking objects and capable of detecting a water level inside a cookware, comprises: a first probe; a second probe; a lean angle sensor configured to detect a lean angle of the first probe and the second probe; a capacitance sensor configured to detect capacitance between the first probe and the second probe; and a processor configured to calculate a danger level of the cookware based on an intensity of a current flowing from the first probe to the second probe and the lean angle of the first probe and the second probe; and configured to determine whether the water level inside the cookware reaches the danger level based on the capacitance between the first probe and the second probe.

An apparatus for monitoring of a level of a liquid within a container, the apparatus comprising: at least one permanent magnet embedded within an attachment band disposed on the exterior wall of the container, or in a float disposed within said container and free-floating or immersed on said liquid, an electric circuitry comprising an electric power source, alarming device and at least one magnetic proximity sensor embedded respectively into the float disposed within said container and free-floating or immersed in the liquid or in the attachment band. The float moves laterally and vertically into and out of proximity of the attachment band, with variance of the level of the liquid, wherein the proximity of the float to the attachment band is sensed by the at least one magnetic proximity sensor, when the float is in close proximity to the attachment band, thereby activating the alarming device to notify a user/caregiver about possible depletion of liquid within the container.

An apparatus for measuring liquid volume in a container includes a plurality of light sources for emitting electromagnetic radiation (EMR) toward the container, a plurality of sensors optically coupleable to the plurality of light sources, each sensor of the plurality of sensors for detecting the EMR emitted by at least a portion of the plurality of light sources, a temperature sensor for measuring at least one temperature associated with a liquid in the container, and at least one processor for receiving data representative of the portion of the detected EMR from each of the plurality of sensors, comparing the at least one measured temperature to a temperature guideline to identify any temperature events associated with the received data; normalizing the received data based on any temperature events associated with the received data; and converting the normalized data into a signature representative of the EMR detected by the plurality of sensors.

A glue injecting device includes a glue container, a piston, a magnetic component, and a detection alarm assembly. The glue container defines a cavity for receiving glue materials and an outlet opening communicating with the cavity. The piston is received in the cavity for extruding the glue materials from the outlet opening. The magnetic component is arranged on the piston. The detection alarm assembly comprises an electromagnetic sensor and an alarm. The electromagnetic sensor configured to detect a position of the magnetic component is sleeved on the glue container and is close to the outlet opening, the alarm is electrically connected to the electromagnetic sensor and is configured to issue an alarm when the position of the magnetic component detected by the electromagnetic sensor is flush with the electromagnetic sensor. The disclosure also provides an apparatus having the glue injecting device.

A spraying system for a road construction machine includes an emulsion fluid delivery system including an emulsion fluid supply, an emulsion pump, at least one spray bar with one or more nozzles, and flow conduits arranged to convey emulsion through the emulsion fluid delivery system. The spraying system may include a cleaning fluid tank containing a cleaning fluid, where the cleaning fluid tank is fluidly coupled to the emulsion fluid delivery system during a cleaning process. The spraying system may also include a flow monitoring system configured to monitor the amount of cleaning fluid delivered from the cleaning fluid tank to the emulsion fluid delivery system, where the flow monitoring system is configured to provide an indication regarding the amount of cleaning fluid delivered to the emulsion fluid delivery system during the cleaning process.

An apparatus for measuring liquid volume in a container includes a plurality of light sources for emitting electromagnetic radiation (EMR) toward the container, a plurality of sensors optically coupleable to the plurality of light sources, each sensor of the plurality of sensors for detecting the EMR emitted by at least a portion of the plurality of light sources, a temperature sensor for measuring at least one temperature associated with a liquid in the container, and at least one processor for receiving data representative of the portion of the detected EMR from each of the plurality of sensors, comparing the at least one measured temperature to a temperature guideline to identify any temperature events associated with the received data; normalizing the received data based on any temperature events associated with the received data; and converting the normalized data into a signature representative of the EMR detected by the plurality of sensors.

An apparatus for measuring liquid volume in a container includes a plurality of light sources for emitting electromagnetic radiation (EMR) toward the container, a plurality of sensors optically coupleable to the plurality of light sources, each sensor of the plurality of sensors for detecting the EMR emitted by at least a portion of the plurality of light sources, a temperature sensor for measuring at least one temperature associated with a liquid in the container, and at least one processor for receiving data representative of the portion of the detected EMR from each of the plurality of sensors, comparing the at least one measured temperature to a temperature guideline to identify any temperature events associated with the received data; normalizing the received data based on any temperature events associated with the received data; and converting the normalized data into a signature representative of the EMR detected by the plurality of sensors.

A liquid level detection device detecting a liquid level of a liquid in a container includes a heater configured to heat the container, a plurality of temperature sensors provided at different heights of the container, and configured to detect a surface temperature of the container, and a controller configured to detect the liquid level of the liquid in the container, based on the surface temperature of the container detected by the plurality of temperature sensors when the heater is caused to heat.

A water gauge for on-site monitoring and early warning includes an alarm part, a control part and a retractable part. The retractable part is fixedly connected with the alarm part at the top, and the control part at the bottom; the alarm part is electrically connected with the control part through a wire; the control part compares the water level measured by the retractable part with a preset threshold, to determine whether the alarm part needs to give an alarm. When the water on the road rises to the warning line of 30 cm set on the water gauge during a rainstorm, the warning light on the top of the water gauge will start to flash, and the water gauge will give an alarm through the speaker, reminding the pedestrians and vehicles not to pass the section for the time being.