23results about "Fluid speed measurement using swirlflowmeter" patented technology

The invention belongs to the technical field of hydraulic engineering, and relates to a dam safety monitoring system and method based on the Internet of Things, and the system comprises a vibration energy supply module, a cylindrical bluff body structure and a piezoelectric ceramic sensor are arranged on the upstream face of a dam, the bluff body structure is used for guiding water flow to form a Karman vortex street, and the water flow speed of the dam is monitored in real time; analyzing a Karman vortex shedding frequency based on an FFT spectrum, and matching the Karman vortex shedding frequency with the resonant frequency of the piezoelectric ceramic sensor to obtain dual-frequency matching data; the multi-dimensional observation acquisition module is used for converting kinetic energy of dam water flow into electric energy by using the generated Karman vortex shedding frequency, supplying power to a preset multi-dimensional sensor through the converted electric energy, and acquiring dam multi-dimensional observation data based on the multi-dimensional sensor; the three-dimensional hopping communication module is used for sensing and identifying power frequency and harmonic components of the surrounding environment in real time based on the dual-frequency matching data, and generating a dynamic avoidance frequency point table to complete frequency hopping switching; and the reliability and foresight of dam safety monitoring are enhanced.

The swimming pool robot comprises a shell, a filtering module, a water pump module and a water leaving detection module, and the water leaving detection module comprises a buoyancy unit and a sensing unit; the swimming pool robot is provided with a water drainage module, a first cavity communicated with the water inlet is formed in the shell, the first cavity is located at the front end of the advancing direction of the swimming pool robot, and the first cavity is communicated / closed with the outside through the water drainage module; the swimming pool robot is provided with a control module, a cleaning module and a driving module. The control module is in signal connection with the driving module and the water leaving detection module. The driving module simultaneously controls the swimming pool robot and the cleaning module to move; the water pump module comprises a guide part and a power water pump; the water outlet, the guide part and the power water pump are sequentially connected; a first chamber and a second chamber which are separated from each other are arranged in the shell; the bottom of the shell is provided with a flow channel enabling the resistance to be reduced when the swimming pool robot moves. And the bottom of the shell is also provided with a cavity area which is formed by sinking inwards.

A vortex flow meter (100) includes a flowtube (102) configured to receive a flow of process fluid. A shedder bar (118) is disposed within the flowtube (102) and is configured to generate vortices in the flow of process fluid. A vortex sensor (144) is disposed to sense vortices in the flow of process fluid generated by the shedder bar (118). Measurement electronics (202) are operably coupled to the vortex sensor (144) and are configured to detect an analog signal of the vortex sensor (144) and provide a digital indication relative to the analog signal of the vortex sensor (144). A processor (200) is configured to receive the digital indication and calculate velocity of the process fluid flow based on a frequency of the digital indication. The processor (200) is also configured to measure an amplitude of the digital indication and estimate density of the process fluid based on the measured amplitude. The processor (200) is further configured to determine a fluid type based on the measured amplitude and assign a unit of flow corresponding to the calculated velocity to a fluid totalizer corresponding to the detected fluid type.

Provided are a sensor and a wind direction / wind speed / rain amount detection device that accurately measure both wind speed and rain amount by means of a single sensor. This sensor comprises: a piezoelectric element 20 that detects the vibration caused by Karman vortices caused by wind and also detects the impact of raindrops; and a Karman vortex generator 30 that is provided opposite the piezoelectric element 20 and generates a Karman vortex.

The utility model relates to the technical field of pulverized coal anemometers, in particular to a split insertion rod of a pulverized coal anemometer, which comprises a gauge outfit assembly, a butt joint assembly is mounted at the bottom of the gauge outfit assembly, a measuring assembly is mounted at the bottom of the butt joint assembly, the gauge outfit assembly comprises a measuring gauge outfit, one end of the measuring gauge outfit is provided with a display screen, and the other end of the measuring gauge outfit is provided with a display screen. The top of the measuring meter head is provided with an access pipe, and one end of the measuring meter head is provided with a power supply assembly. According to the improved insertion rod, a ceramic protection tube is arranged to be matched with a rectification sensor made of a high-hardness wear-resistant material to protect the insertion rod and the sensor, so that the friction loss of the pulverized coal anemograph during measurement is reduced, and the service life of the pulverized coal anemograph is prolonged; and meanwhile, the insertion rod and other components of the pulverized coal anemograph are connected in a manner of matching flange splicing and multi-group splicing, so that the installation is convenient, the partial components of the insertion rod can be conveniently and separately replaced when the insertion rod is damaged, the maintenance cost is reduced, and the use effect of the pulverized coal anemograph is improved.

The utility model relates to the technical field of vortex street anemographs, in particular to a ceramic protection type plug-in powder anemograph which comprises an insertion rod, the rear end of the insertion rod is connected with a supporting rod through a small flange and an installation flange, and a meter head is installed at the rear end of the supporting rod and fastened through a locking nut. The front end of the insertion rod is connected with the split wear-resistant meter body; a split wear-resistant vortex generating body is mounted at the front end in the split wear-resistant meter body and is mounted and fastened through an inner hexagon screw, and the split wear-resistant vortex generating body and the split wear-resistant meter body form a detachable structure; a split wear-resistant meter body made of hard alloy is adopted, a split wear-resistant vortex generating body in the split wear-resistant meter body is installed through an inner hexagon screw and forms a same-diameter pipeline passage with the split wear-resistant meter body, the vortex generating body at the front end of the split wear-resistant meter body is firstly worn, and the split wear-resistant meter body and the split wear-resistant meter body are fixed according to the wear degree of industrial and mining operation. The vortex generating body at the foremost end can be regularly disassembled and replaced in the overhaul period, maintenance is convenient, maintenance cost is reduced, and the service life of the whole anemograph is prolonged.

To provide a detector for detecting a change in the speed of flow of a conductive fluid, which includes an electromagnetic transducer.SOLUTION: A detector for detecting a change in the speed of flow of a conductive fluid comprises: an electromagnetic transducer 10 including a metal cylindrical tube 2 forming a core having high magnetic permeability, an electric coil 3 wound around the tube and intended to be powered with direct current or a permanent magnet arranged around the tube, and at least one electric coil 4 called a receiving coil and wound around the tube while being adjacent to a primary coil or the permanent magnet; and at least one envelope detection circuit connected to the receiving coil and including at least one diode and one load in electrical series with the diode, the load being made up of a capacitor and an electrical resistor.SELECTED DRAWING: Figure 11

The sensor element comprises a base body (11) with a (base body) cavity (11*) having an open first end and a second end, a deformation body (12) made of an electrically conductive material, a sleeve-shaped reference electrode (13) made of an electrically conductive material with a (reference electrode) cavity (13*) having an open first end and a second end, and a filler body (14) made of an electrically non-conductive (insulating) material with a (filler) cavity (14*) having an open first end and a second end. The filler body (14) together with the reference electrode (13) (embedded therein) are arranged within the base body cavity (11*).In addition, the deformation body (12) and the base body (11) are mechanically coupled to form a sensor cavity (1*) in such a way that an (elongated) sensor electrode of the deformation body is arranged partially within the reference electrode cavity, forming an (annular) gap (1') between the sensor electrode and the reference electrode (13), and that the base body (11) and deformation body (12) are connected to each other to form an electrically conductive connection. The deformation body (12) is also configured to execute oscillations about a static rest position in such a way that the sensor electrode executes (cantilever) oscillations that deform the (annular) gap (1') and thus change a (sensor) capacitance C1 formed between the deformation body and the reference electrode (a capacitor formed by the deformation body, the filler body, and the reference electrode).

This invention relates to a swimming pool robot, comprising a shell, a filter module, a water pump module, and a water-leaving detection module. The water-leaving detection module includes a buoyancy unit and a sensing unit. The swimming pool robot is equipped with a drainage module. A first chamber is formed inside the shell and communicates with the water inlet. The first chamber is located at the front end of the swimming pool robot in the direction of travel and is connected to / closed to the outside through the drainage module. The swimming pool robot is equipped with a control module, a cleaning module, and a drive module. The control module is signal-connected to the drive module and the water-leaving detection module, respectively. The drive module simultaneously controls the movement of the swimming pool robot and the cleaning module. The water pump module includes a guide component and a power water pump. The water outlet, the guide component, and the power water pump are connected in sequence. The shell has a first chamber and a second chamber that are separated from each other. The bottom of the shell has a flow channel that reduces resistance when the swimming pool robot moves. The bottom of the shell also has an inwardly recessed cavity area.

The present invention relates to a swimming pool robot, which comprises: a housing, a filter module, a water pump module, and an out-of-water detection module, the out-of-water detection module comprising a buoyancy unit and a sensing unit; the swimming pool robot is provided with a water drainage module, and the housing has formed therein a first cavity communicated with a water inlet, the first cavity being located at the front end of the swimming pool robot in the advancing direction, and the first cavity being communicated with / closed relative to the outside via the water drainage module; the swimming pool robot is provided with a control module, a cleaning module, and a drive module, the control module being respectively in signal connection with the drive module and the out-of-water detection module; the drive module simultaneously controls the movement of the swimming pool robot and cleaning module; the water pump module comprises a guide component and a power water pump, and the water outlet, the guide component, and the power water pump are successively connected; the housing has formed therein the first cavity and a second cavity which are arranged separately; the bottom of the housing is provided with a flow channel for reducing resistance when the swimming pool robot moves; and the bottom of the housing is further provided with an inwardly recessed cavity area.

The invention relates to a sensor element comprising a main body (11) with a (main body) cavity (11*) having an open first end and a second end, a deformation body (12) made of an electrically conductive material, a sleeve-like reference electrode (13) made of an electrically conductive material with a (reference electrode) cavity (13*) having an open first end and a second end, and a filling body (14) made of an electrically non-conductive (insulating) material with a (filling body) cavity (14*) having an open first end and a second end. The filling body (14) together with the reference electrode (13) (embedded therein) are arranged within the main body cavity (11*). In addition, the deformation body (12) and the main body (11) are mechanically coupled to one another so as to form a sensor cavity (1*) such that an (elongated) sensor electrode of the deformation body is partly arranged within the reference electrode cavity, thereby forming an (annular) gap (1') between the sensor electrode and the reference electrode (13), and the main body (11) and the deformation body (12) are connected to one another, thereby forming an electrically conductive connection. The deformation body (12) is additionally designed to vibrate about a static rest position in such a way that the sensor electrode carries out (cantilever) vibrations which deform the (annular) gap (1') and thus change a (sensor) capacitance C1 (of a capacitor formed by means of the deformation body, the filling body and the reference electrode) formed between the deformation body and the reference electrode.

A swimming pool robot comprising:a housing having a water inlet and a first water outlet thereon, and having a receiving structure disposed therein such that an interior space of the housing is divided into a first chamber and a second chamber, the receiving structure comprising a partition plate and a structure having at least one first opening, the first chamber having an interior space surrounded by the partition plate and the structure having the at least one first opening, and the second chamber comprising a first sub-chamber and a second sub-chamber;a water pump, wherein at least a portion of the water pump is disposed in the first sub-chamber, wherein the water inlet, the first chamber, the first sub-chamber, the water pump, and the first water outlet are connected to each other, and wherein the water pump is configured to drive a water flow to enter the first chamber via the water inlet, enter the first sub-chamber from the first chamber via the at least one first opening, and then flow out of the first sub-chamber via the first water outlet outside the swimming pool robot; and a garbage filter container disposed in the first chamber, wherein the garbage filter container is located between the partition plate and the water pump, and the partition plate is configured to prevent water in the second sub-chamber from directly entering the garbage filter container in a direction facing the water pump.

The utility model discloses a liquid physical property and critical Reynolds number measuring device based on laser diffraction. The liquid physical property and critical Reynolds number measuring device comprises a bottom plate, a left water tank and a right water tank, a laser regulator is fixedly mounted on the upper side of the left end of the left water tank, and a low-frequency generator located on the left water tank is mounted on the right side of the laser regulator; a bearing plate is nested and attached to the right water tank, and a lifting adjusting structure for the optical screen is arranged on the bearing plate; a flow velocity measuring structure is arranged between the left water tank and the right water tank, and a liquid tracing structure is arranged on the left water tank. According to the liquid physical property and critical Reynolds number measuring device based on laser diffraction, multiple functions are integrated, the surface tension coefficient, the viscosity coefficient and the liquid flow speed of liquid can be measured conveniently, and the flowing state can be judged by observing the phenomenon of red ink in the first connecting pipe and the second connecting pipe conveniently; and the degradable red ink can prevent liquid in the left water tank and the right water tank from being polluted.

The invention relates to a detector comprising an electromagnetic transducer for detecting changes in velocity of a flow of an electrically conductive fluid, in particular comprising:-an electromagnetic transducer (10) comprising: a cylindrical metal tube (2) forming a core having a high magnetic permeability; an electric coil (3), referred to as a primary coil, wound around the tube and intended to be powered by a direct current, or a permanent magnet arranged around the tube; at least one electrical coil (4), referred to as a receiver coil, wound around the tube while being adjacent to the primary coil or the permanent magnet,-at least one envelope detection circuit (7) connected to the receiver coil and comprising at least one diode (8; 8.1, 8.2) and at least one load (9; 8.1, 8.2) electrically connected in series with the diode; 9.1, 9.2), said load being supplied by a capacitor (91; 91.1, 91.2) and a resistor (90; 90.1, 90.2), and a method for manufacturing the same.

Detector for detecting a change in velocity of a flow of electrically conductive fluid, including an electromagnetic transducer. A detector for detecting a change in velocity of a flow of an electrically conductive fluid, including: an electromagnetic transducer having: a metal cylindrical tube forming a core having a high magnetic permeability, an electric coil, called primary coil, wound around the tube and intended to be electrically powered with direct current, or a permanent magnet arranged around the tube, at least one electric coil, called receiver coil, wound around the tube while being adjacent to the primary coil or to the permanent magnet, at least one envelope detector circuit connected to the receiver coil, comprising at least one diode and one load electrically in series with the diode, the load being made up of a capacitor and of an electrical resistor.

The utility model discloses a low-pressure-loss wear-resistant wind speed measuring device, which relates to the technical field of wind speed measurement, and comprises a measuring assembly and a shunting piece, the measuring assembly comprises an air pipe and an eddy current detection mechanism, and the eddy current detection mechanism is connected with the air pipe and is positioned between an air inlet and an air outlet of the air pipe. The flow dividing piece is arranged in the air pipe and located between the air inlet and the eddy current detection mechanism, the flow dividing piece comprises a first flow dividing plate and a second flow dividing plate which are connected with each other and form an included angle, the thickness direction of the first flow dividing plate is parallel to the center axis of the air pipe, and the second flow dividing plate is located on the side, opposite to the air inlet, of the first flow dividing plate. The air flow in the air pipe sequentially passes through the first splitter plate and the second splitter plate to form vortex, pulverized coal is not prone to being accumulated in the air pipe, the accumulated pulverized coal can be taken out through the vortex even if the pulverized coal is accumulated, the measurement precision of the vortex detection mechanism on the pulverized coal cannot be disturbed, and meanwhile the risk of spontaneous combustion of the pulverized coal in the air pipe is reduced.

The utility model provides a channel water flow velocity measurement and detection device, and relates to the technical field of water flow velocity measurement, the channel water flow velocity measurement and detection device comprises a detection box, detection channels are arranged on the two sides of an inner cavity of the detection box, detection turbines are installed in the middles of the inner sides of the two detection channels through fixing frames, and a water outlet channel is arranged between the two detection channels; a first protective net is arranged at the inlet end of the detection box, a second protective net is arranged at the inlet end of the detection channel, and a flow divider is arranged in the middle of an inner cavity of the detection box and located at the inlet end of the detection box. By arranging the first protective net and the second protective net, river water can be subjected to multi-stage filtration, so that the detection turbines are effectively prevented from being impacted by sundries in the river water in the running process and being damaged, in addition, the speed of water flow is measured by adopting the two groups of detection turbines, and finally concentrated analysis is performed, so that the detection accuracy is improved. Therefore, the efficiency and the accuracy of detecting the flow velocity of the channel water are effectively improved.

Speed ​​variation detector for an electrically conductive fluid flow, comprising an electromagnetic transducer. The invention relates to a speed variation detector for an electrically conductive fluid flow, comprising: - an electromagnetic transducer (10), comprising: a metallic cylindrical tube (2) forming a core with high magnetic permeability, an electrical coil (3), called the primary coil, wound around the tube and intended to be electrically powered by direct current, or a permanent magnet arranged around the tube, at least one electrical coil (4), called the receiving coil, wound around the tube while being adjacent to the primary coil or the permanent magnet, - at least one envelope detector circuit (7) connected to the receiving coil, comprising at least one diode (8; 8.1, 8.2) and a load (9; 9.1, 9.2) in electrical series with the diode, the load being made up of a capacitor (90; 90.1, 90.2), and an electrical resistance (91; 91.1, 91.2). Figure for the abbreviation: fig.11.

Detector for variation in the speed of a flow of an electrically conductive fluid, comprising an electromagnetic transducer. The invention relates to a detector for variation in the speed of a flow of an electrically conductive fluid, comprising: - an electromagnetic transducer (10), comprising: a metallic cylindrical tube (2) forming a core with high magnetic permeability, an electric coil (3), called the primary coil, wound around the tube and intended to be electrically powered with direct current, or a permanent magnet arranged around the tube, at least one electric coil (4), called the receiver coil, wound around the tube while being adjacent to the primary coil or to the permanent magnet, - at least one envelope detector circuit (7) connected to the receiver coil, comprising at least one diode (8; 8.1, 8.2) and a load (9; 9.1, 9.2) in electrical series with the diode, the load consisting of a capacitor (90; 90.1, 90.2), and an electrical resistance (91; 91.1, 91.2).

Detector for variation in the speed of a flow of an electrically conductive fluid, comprising an electromagnetic transducer. The invention relates to a detector for variation in the speed of a flow of an electrically conductive fluid, comprising: - an electromagnetic transducer (10), comprising: a metallic cylindrical tube (2) forming a core with high magnetic permeability, an electric coil (3), called the primary coil, wound around the tube and intended to be electrically powered with direct current, or a permanent magnet arranged around the tube, at least one electric coil (4), called the receiver coil, wound around the tube while being adjacent to the primary coil or to the permanent magnet, - at least one envelope detector circuit (7) connected to the receiver coil, comprising at least one diode (8; 8.1, 8.2) and a load (9; 9.1, 9.2) in electrical series with the diode, the load consisting of a capacitor (90; 90.1, 90.2), and an electrical resistance (91; 91.1, 91.2). Figure for the abstract: fig.11.

The present invention belongs to the technical field of water conservancy projects. The present invention provides a dam safety monitoring system and method based on the Internet of Things, including a vibration energy supply module, in which a cylindrical blunt body structure and a piezoelectric ceramic sensor are arranged on the water-facing surface of the dam, and the blunt body structure is used to guide the water flow to form a Karman vortex street, so as to monitor the water flow velocity of the dam in real time; the Karman vortex street shedding frequency is analyzed based on the FFT spectrum, and is matched with the resonant frequency of the piezoelectric ceramic sensor to obtain dual-frequency matching data; a multi-dimensional observation and acquisition module uses the generated Karman vortex street shedding frequency to convert the kinetic energy of the dam water into electrical energy, and the converted electrical energy is used to power a preset multi-dimensional sensor, and multi-dimensional observation data of the dam is collected based on the multi-dimensional sensor; a three-dimensional hopping communication module senses and identifies the power frequency and harmonic components of the surrounding environment in real time based on the dual-frequency matching data, generates a dynamic avoidance frequency point table to complete frequency hopping switching, thereby enhancing the reliability and foresight of dam safety monitoring.