47results about How to "Large range" patented technology

The embodiment of the invention provides a differential Hall current sensor and a manufacturing method thereof, and belongs to the technical field of semiconductors. The differential Hall current sensor includes: a substrate; the magnet yoke is provided with a semi-enclosed structure formed by a bottom surface and two side surfaces positioned on the same side of the bottom surface, and the bottom surface is bonded on the substrate; the current bar is placed in the cavity of the semi-surrounding structure and allows two end parts of the current bar to extend out of the semi-surrounding structure; the insulating layer is arranged on the upper surface of the current bar and located in the cavity; the at least two Hall elements are symmetrically arranged on the two sides of the upper surface of the insulating layer in the current direction; the at least two groups of magnetism gathering blocks are attached to the magnetic induction surfaces of the at least two Hall elements; at least two groups of magnetism gathering blocks and the magnet yoke form a conducting magnetic circuit, and the magnetic field component of the current magnetic field in the parallel direction of the magnetic induction surface is deflected into the magnetic field component in the vertical direction. According to the differential Hall current sensor, the Hall perceptible magnetic field intensity is enhanced through the conduction magnetic circuit of the gathered current magnetic field, and the measurement sensitivity is improved.

The present invention belongs to the field of optical fiber measurement technology, and specifically relates to an optical fiber distributed polarization crosstalk fast measurement device based on optical frequency domain interference. The device comprises a tunable laser source module (1), a device to be measured module (2), an auxiliary interferometer module (3) and a signal acquisition and analysis module (4), and is characterized in that: a high-coherence tunable laser is used to perform fast wavelength scanning on an optical signal, and a linear frequency modulated continuous light (501) is output, which passes through a polarizer (202), a device to be measured (206) and an analyzer (210) in sequence, and a beat frequency signal generated by the interference of a coupling light (704) and a transmission light (701) is obtained in the optical frequency domain, and then an optical path difference and a normalized interference signal amplitude are calculated, thereby respectively determining the polarization crosstalk position and intensity. The present invention, in combination with a tunable laser, gets rid of the dependence on an optical path scanning delay device in polarization crosstalk measurement, greatly improves the speed and dynamic range of polarization crosstalk measurement, and has a compact structure, is stable and reliable, and is easy to implement.

The utility model relates to the technical field of tunnel seepage flow monitoring, in particular to tunnel seepage flow monitoring equipment which comprises a tunnel loading assembly, a supporting control assembly is arranged on the side face of the tunnel loading assembly, and the top of the supporting control assembly is fixedly connected with a transduction adjusting assembly. The ultrasonic flow meter is used for detecting the flow velocity, a measuring point is in front of the probe, a flow field is not damaged, and the ultrasonic flow meter has the advantages of high measuring precision, wide measuring range, capability of measuring weak flow and strong flow, high resolution, high response speed, capability of measuring instantaneous flow velocity and average flow velocity, measurement linearity, difficulty in change of a flow velocity calibration curve, no mechanical rotating part, high reliability and the like. The problems of sediment blockage and aquatic plant winding do not exist, the probe is firm, durable, not prone to damage, easy and convenient to operate and the like, a motor is used for driving a bevel gear and a transmission wheel to be meshed and driving a photovoltaic panel on a rotating rod to rotate, the solar energy absorption range of the photovoltaic panel can be enlarged, and the energy storage rate of the photovoltaic panel is increased.

The utility model discloses a clearance measurement vernier feeler gauge which comprises a base body and a gauge body arranged on the base body, the gauge body is in a wedge shape, a vernier sliding block is arranged on the inclined face of the gauge body, a distance measuring module and a display module are arranged on the base body, the distance measuring module is arranged at the tail end of the inclined face of the gauge body and right faces the vernier sliding block, and the display module is arranged on the base body. And the display module is used for displaying the measurement result. The method has the advantages that the gap width is conveniently and rapidly detected, and the detection efficiency is improved. The utility model further provides a gap measuring device which comprises the two gap measuring vernier feeler gauges and the connecting piece, and the bottoms of the two gap measuring vernier feeler gauges are connected with each other.

The invention relates to a fast-response closed-loop micro-thrust measurement method and device based on dynamic thrust inversion. The method comprises the following steps of obtaining kinetic equation parameters of a measurement system; in each control period, calculating a control quantity, and taking the control quantity as a standard force; in the current control period, based on displacement data obtained through measurement of the measurement system and the kinetic equation parameters, the resultant force of the previous control period is calculated through a kinetic inversion algorithm; on the basis of the difference between the standard force of the previous control period and the resultant force, the thrust to be measured of the previous control period is obtained through calculation; and performing low-pass filtering processing on the thrust to be measured to obtain a final result. Compared with the prior art, the method can improve the measurement response speed on the premise of not increasing the noise level.

The invention discloses a single-magnet-ring dual-processing-circuit switching wide-range leakage current sensor and method. A magnetic core works in a deep magnetic saturation state based on a magnetic modulation principle and is used for sensing a leakage current signal; the square wave self-oscillation circuit is used for sending a square wave signal to the coil by utilizing the inductance effect of the coil; each of the two signal processing circuits comprises a filter, a proportional amplifier and a lock-in amplifier, and only amplification factors of the proportional amplifiers are different, and the proportional amplifiers are used for processing induced leakage current signals; and the microprocessor is used for analyzing and processing the signal output by the signal processing circuit. The system can monitor the insulation state of the energy storage system in real time, effectively improves the safety and reliability of the system, and is suitable for photovoltaic power generation, wind power generation and other application scenes related to the energy storage system.

The embodiment of the invention provides an energy spectrum measurement system and a spectrum unfolding method of the energy spectrum measurement system. The energy spectrum measurement system comprises an energy spectrum measurement device. The energy spectrum measurement device comprises a shielding assembly, a plurality of measurement assemblies and an absorption sheet assembly. The shielding assembly is provided with a mounting cavity, and one end of the mounting cavity is open to form an incident port for X-rays to enter. The measuring assembly comprises a thermoluminescence dosimeter. The absorption piece assembly comprises a first absorption piece and a plurality of second absorption pieces, the first absorption piece is arranged on the outer side of the incident port, the second absorption pieces are arranged in the mounting cavity, and the measuring assembly is arranged between the first absorption piece and the adjacent second absorption piece; the measuring assemblies are arranged between the adjacent second absorbing pieces, and the first absorbing pieces and the second absorbing pieces are made of different materials. The energy spectrum measurement system provided by the embodiment of the invention is good in measurement effect.

The invention provides a flexible conductive composite material and a preparation method and application thereof, and belongs to the technical field of high polymer materials, and the preparation method comprises the following steps: mixing graphene, carbon nanotubes and a polar organic solvent to obtain a nano carbon material dispersion liquid; mixing raw silicone rubber, a silane coupling agent and the nano carbon material dispersion liquid, and carrying out surface modification treatment to obtain a nano carbon modified raw rubber mixed liquid; and mixing the nanocarbon modified raw rubber mixed solution with a cross-linking agent, and carrying out a cross-linking reaction to obtain the flexible conductive composite material. The prepared flexible conductive composite material has a low seepage threshold value and high mechanical performance, and after the flexible conductive composite material serves as a sensing layer of the flexible piezoresistive sensor, the flexible piezoresistive sensor can have a large measuring range and high sensitivity and repeated loading capacity.

The invention discloses a radiation dose rate range-adjustable directional radiation detection device and an application method, and the device comprises an environment-level measurement module for detecting radiation dose, an upper computer which is in communication connection with the measurement module through a communication module, and a shielding module which is provided with a detection window matched with a radiation source to be detected; the ray attenuation adjusting module is arranged in the shielding module and is in communication connection with the upper computer; and the power supply is electrically connected with the ray attenuation adjusting module, the measuring module and the communication module. According to the directional radiation detection device with the adjustable radiation dose rate range and the application method provided by the invention, a high-sensitivity environment-level radiation detection instrument is adopted, and radiation dose rate measurement in an ultra-large range with range coverage from low to high can be realized through the ray attenuation adjustment module according to measurement requirements. According to the measurement mode, under the condition that the sensitivity is ensured, the protection range can be ensured to meet the application requirement of the high-sensitivity radiation detector at the same time.

The invention relates to a pressure sensor, a pressure sensing array and a preparation method thereof. The pressure sensor includes: a first substrate; the first sensing electrode is positioned on the upper surface of the first substrate; the first insulating layer is located on the surface of the first sensing electrode and comprises a plurality of first microspheres arranged in an array or is a first hollow film layer; the first pressure-sensitive layer is positioned on the surface of the first insulating layer and is filled in a first gap in the first insulating layer; a second substrate over the first substrate; the second sensing electrode is positioned on the lower surface of the second substrate; the second insulating layer is located on the surface of the second sensing electrode, and the second insulating layer comprises a plurality of second microspheres arranged in an array or a second hollow film layer; and the second pressure-sensitive layer is located on the surface of the second insulating layer, and the second gap in the second insulating layer is filled with the second pressure-sensitive layer. The pressure sensor provided by the invention has higher sensitivity under high pressure and thin thickness.

The invention provides an on-line in-situ thickness measuring method and device for the polishing process of a wafer film, the method comprises a first measuring stage and a second measuring stage, the first measuring stage comprises the step of measuring the thickness of the wafer film by using a multi-wavelength light beam in the polishing process of the wafer film, and the second measuring stage comprises the step of measuring the thickness of the wafer film by using a multi-wavelength light beam in the polishing process of the wafer film. Monitoring whether the thickness reaches a threshold value or not; the second measurement stage comprises the steps that in the process that the wafer film is polished after the thickness reaches a threshold value, an electric signal corresponding to the light intensity of reflected light of the wafer film to the single-wavelength light beam is collected, the thickness of the wafer film is determined through the electric signal, and the electric signal periodically changes along with the change of the thickness.

According to the pressure-temperature dual-mode sensor and the preparation method and application thereof provided by the invention, the pressure sensing layer is designed into the gradient inclined magnetic column array which is distributed in a rectangular array, and the gradient inclined magnetic column array has the layout characteristics of gradient change and inclination of the length, the position and the like of the magnetic columns; a special magnetic field gradient can be created in the space, and the magnetic field gradient can enable the pressure-temperature dual-mode sensor to generate linear or relatively uniform change response to external stimuli with different magnitudes, so that the measuring range of pressure testing can be widened; the problems of inaccurate measurement and small measurement range caused by the stress concentration problem of other microstructures and the large structure overlapping phenomenon are effectively solved. And meanwhile, the pressure sensing layer and the temperature sensing layer are tested in a layered manner, so that the problem of mutual crosstalk of a temperature signal and a pressure signal is avoided, and the detection accuracy and precision of the pressure-temperature dual-mode sensor are further improved.

The application discloses a micro-force measuring device and method, which comprises a pair of first parallel-plate capacitors and two pairs of second parallel-plate capacitors in a comb structure, two pairs of force-sensitive elements, force-loading probes, a capacitance measuring circuit and a micro-force measuring unit, wherein the first parallel-plate capacitors are variable-distance capacitors, the second parallel-plate capacitors are variable-area capacitors, the capacitance measuring circuit measures the capacitances of the first parallel-plate capacitors and the second parallel-plate capacitors after the force-loading probes are forced to move, and the micro-force measuring unit calculates the movement displacement of the force-loading probes under small-range micro-force measurement and large-range micro-force measurement respectively according to the measured capacitances, and calculates the micro-force under corresponding range micro-force measurement according to the movement displacement and the spring stiffness of the force-sensitive elements. The application has the characteristics of high sensitivity and long service life, and can realize high-precision and large-range testing and force resolution adjustment simultaneously.

The invention relates to the technical field of distance measurement of wall-climbing robots, in particular to a distance measurement method of a cable-type wall-climbing robot and the cable-type wall-climbing robot, in the method, the cable-type wall-climbing robot comprises a rotating structure and an encoder, the rotating structure is connected with a rope connected with the cable-type wall-climbing robot and is used for synchronously moving with the cable-type wall-climbing robot, and the encoder is connected with the cable-type wall-climbing robot. The encoder is connected with the rotating structure. The method comprises the following steps: acquiring the pulse number of the encoder; and the moving distance of the cable type wall-climbing robot is determined according to the pulse number and the preset unit length corresponding to each pulse. According to the technical scheme, the mode that the encoder measures the moving distance is adopted, the influence of the external environment is small, the influence of the height is avoided, the stability during distance measurement is higher, the distance measurement range is larger, the testing precision of the encoder is higher, and more accurate height data can be provided.

The present invention belongs to the field of optical fiber measurement technology, and specifically relates to a distributed polarization crosstalk fast measurement device based on optical frequency domain frequency shift interference, the device includes a tunable laser source module, a device to be measured module, a main interferometer module, an auxiliary interferometer module and a signal acquisition and analysis module, and is characterized in that: a tunable laser is used to perform fast wavelength scanning, a main interferometer is used to perform frequency shift on an interference beat frequency signal, and the position and intensity of polarization crosstalk are determined by obtaining the optical path difference between coupled light and transmitted light and the normalized interference signal amplitude, while also eliminating the signal aliasing problem caused by 1 / f flicker noise at low frequencies and light source frequency scanning nonlinearity. The present invention, combined with a tunable laser, gets rid of the dependence on an optical path scanning delay device in polarization crosstalk measurement, realizes an all-fiber structure without moving parts, enhances the reliability and stability of the test system, and greatly improves the speed and signal-to-noise ratio of polarization crosstalk measurement in principle.

This invention discloses a fiber Bragg grating level sensor based on liquid pressure conversion, comprising a fiber Bragg grating demodulator, a 2×1 fiber coupler, a transmission fiber, and a sensing unit. The sensing unit consists of a strain-sensing fiber Bragg grating, a temperature-compensated fiber Bragg grating, a sealed cylinder, a support beam, a pressure block, a pressure tension frame, a sealing membrane, and a stop. The pressure block and the pressure tension frame convert liquid level changes into longitudinal displacement changes, causing axial strain in the strain-sensing fiber Bragg grating. This results in a drift in the center wavelength of the strain-sensing fiber Bragg grating, and the liquid level height of the container is measured by monitoring this wavelength change. This invention eliminates the influence of temperature on the liquid level measurement results through a temperature-compensated fiber Bragg grating, offering advantages such as a large measurement range, good practicality, simple structure, low cost, good stability, high sensitivity, and safety and reliability, meeting the needs of measuring liquid levels in large storage tanks and other applications.

The invention provides a sensor for measuring oil content in water. The sensor comprises a detection cavity, a light source generator and a light path detector, wherein the light source generator and the light path detector are arranged in the detection cavity; the light source generator generates a first light source group; the light path detector comprises a first lens group, a measuring cavity and a second lens group which are sequentially arranged in the light path direction of the first light source group, and the light path is a straight line; to-be-detected water is stored in the measuring cavity, and the first light source group generates to-be-detected data after passing through the first lens group, the measuring cavity and the second lens group; the light path detector further comprises a second light source group, and the second light source group is arranged in the emergent direction of the light path of the second lens group and used for measuring the data to be detected. According to the sensor provided by the embodiment of the invention, all detection devices are integrated in the detection cavity, and the sensor comprises a plurality of light sources, and has the characteristics of high temperature resistance, wide range, real-time detection and high stability.

The invention belongs to the technical field of pressure measurement, and provides a multi-path steady-state pressure measurement system and method in a rotating state, and the system comprises a rotating measurement subsystem, a static measurement subsystem, and a dynamic-static conversion subsystem. The rotary measurement subsystem comprises four experiment piece pressure measurement joints and four electromagnetic valves; the static measurement subsystem comprises an equipment pipeline gas supply pressure measurement joint, an absolute pressure transmitter and a four-range differential pressure transmitter. According to the invention, multi-path steady-state pressure measurement is realized by controlling the opening and closing states of the four electromagnetic valves; the limitation of the geometric dimension and the installation position of the rotary measurement subsystem is removed, the defect that the overall rigidity of a conventional system is weakened due to the fact that a shaft system is long is overcome, and stable operation of a rotor system at a high rotating speed is achieved. By introducing the differential pressure transmitter with four ranges, the contradiction between the pressure measurement range and the measurement precision is solved, and wide-range and high-precision multi-point pressure measurement is realized.

The utility model relates to an aluminum shell discharging and transferring structure which comprises a mechanical arm and a moving assembly controlling the mechanical arm to move front and back, a mounting plate is fixed to the output end of the mechanical arm, a plurality of clamp assemblies for clamping aluminum shells are fixed to the lower surface of the mounting plate, the clamp assemblies are arranged front and back, and each clamp assembly comprises a supporting plate. U-shaped fixing plates are fixed to the two ends of the supporting plate correspondingly, first telescopic air cylinders are fixed to the U-shaped fixing plates, second telescopic air cylinders are fixed to the portions, between the U-shaped fixing plates, of the supporting plate, the output ends of the first telescopic air cylinders and the output ends of the second telescopic air cylinders face the inner side, and first clamping plates are fixed to the output ends of the first telescopic air cylinders; a second clamping plate is fixed to the output end of the second telescopic air cylinder, discharging conveying belts are arranged on the front side and the rear side of the mechanical arm correspondingly, and an aluminum shell feeding conveying belt is arranged on the left side of the mechanical arm. According to the aluminum shell blanking device, aluminum shells of more sizes can be clamped, and blanking of the aluminum shells is achieved.

This invention provides a differential probe dual-color laser frequency stabilization method and system with multiple interactions of coexisting Lamb-dips and Lamb-peaks. Based on the multiple interactions between a multi-frequency laser and a quantum resonance system in a Doppler-free configuration, by setting the relative polarization directions and Raman phases of the pump and probe beams that propagate in opposite directions and coincidentally, resonance signals in the form of coexisting Lamb-dips and Lamb-peaks are obtained. Subtracting these two signals yields a quantum resonance signal with Doppler-free broadening eliminated. This invention obtains a Doppler-free spectral signal with coexisting Lamb-dips and Lamb-peaks and improved contrast, ultimately resulting in a significantly improved signal-to-noise ratio of the Doppler-free quantum resonance signal. This signal can be used for precise spectral measurements and laser frequency stabilization, enabling compact, miniaturized laser sources with ultra-low frequency noise. The system's size and power consumption are greatly reduced, while robustness is improved, resulting in a higher signal-to-noise ratio resonance signal and achieving ultra-high-performance laser frequency stabilization.

The application discloses a bipolar square wave excitation generation and conductivity detection circuit, a direct current bias square wave generation circuit can generate direct current bias square wave excitation signals with different frequencies; a direct current bias generation circuit generates a direct current voltage excitation; the direct current bias of the direct current bias square wave is equivalent to the size of the direct current voltage, and two signals are superposed to form a bipolar square wave excitation signal. An internal reference voltage output by an ADC is used as a voltage source of the direct current bias square wave generation circuit and the direct current bias voltage generation circuit; a node voltage of an ADC acquisition circuit is collected, so that the conductivity and temperature of a medium to be measured are obtained. The excitation and detection mode provided by the application ensures that all circuit voltages are positive voltages, simplifies the structure of the excitation and sampling circuit, is high in measurement accuracy, stable in measurement, low in power consumption and capable of meeting long-term online monitoring requirements.

The application discloses a kind of foam-based flexible tactile sensor and its preparation method, the flexible tactile sensor has three-layer structure, middle layer is PEDOT:pss / rGO composite foam, the composite foam is tactile sensing material, and the upper and lower layers are both flexible PDMS film;The application uses simple and efficient hydrothermal synthesis method and subsequent flash instantaneous irradiation reduction method, and prepares a kind of three-dimensional porous PEDOT:pss / rGO composite foam, can effectively and maximumly keep the composite skeleton structure of original PEDOT:pss / GO foam, and makes PEDOT:pss polymer polymer and rGO sheet closely connected, so that PEDOT:pss / rGO composite foam has better mechanical elasticity and high conductivity, so that flexible tactile sensor has high sensitivity, ultra-low detection lower limit, short response time and good stability and other excellent performance, widely used in human health, motion monitoring and other fields.

The embodiment of the present application discloses a gesture recognition system, method and smart home device based on a one-dimensional TOF sensor. The gesture recognition system includes: a microcontroller and a one-dimensional TOF sensor. The one-dimensional TOF sensor measures the distance between the target hand and the one-dimensional TOF sensor in the target area once every preset time period, and the microcontroller reads the distance data of the one-dimensional TOF sensor; the microcontroller includes a timing module, a counting module and a signal generation module. The timing module calculates the waiting time between the latest distance data read and the next distance data read; the counting module counts the number of distance data in the sensor data group; the signal generation module determines the target gesture result input by the target hand according to the number of distance data and the corresponding distance data change characteristics. Through the above technical means, the technical shortcomings of infrared recognition technology such as short recognition distance and high power consumption are overcome.

The utility model provides a capacitive flexible pressure sensor and a human body monitoring device. The capacitive flexible pressure sensor comprises two groups of electrode layers arranged at intervals and a dielectric layer arranged in a space between the two groups of electrode layers, the dielectric layer comprises a plurality of connecting units, and each connecting unit comprises a first springback structure and a second springback structure; the second springback structure comprises second elastic pieces arranged on the opposite sides of the two sets of electrode layers respectively, and the two second elastic pieces are oppositely arranged and arranged at the nearest point of the two second elastic pieces at a proper distance; the first springback structure comprises a first elastic piece directly connected with the electrode layers at the two ends. According to the capacitive flexible pressure sensor, supporting force grading setting is achieved through the second elastic piece which is not directly connected. In the initial stage of compression, the first elastic piece plays a role, the sensor has high sensitivity, the first and second rebound structures act simultaneously after further compression, and the range of the sensor is expanded. The sensor has the advantages of high sensitivity and wide detection range.

The present invention discloses a device and method for fully automatically measuring the surface adhesion of dust, the device comprises: a breaking unit, a gear unit, a crank mechanism, a base, a disc unit, and a sleeve unit; the breaking unit and the gear unit are fixed on the base; the breaking unit is arranged near the left side of the gear unit, and a crank mechanism is arranged above the gear unit; one side of the crank mechanism is fixed on the base, and the other side is fixed on the gear unit; the disc unit is arranged on the gear unit; the sleeve unit is fixed above the crank mechanism; the method comprises: performing a breaking operation by combining a low-speed motor with an elastic rope, and performing automatic sleeve assembly and automatic feeding operations by using a gear unit and a crank mechanism. The present invention can accurately capture the change of stress at the moment of dust peeling, avoid the experimental error caused by manual assembly, greatly improve the accuracy and repeatability, and the measurement process consumes less materials and can be recycled and reused.

The utility model relates to the field of building engineering quality detection discloses a concrete crack depth measuring scale, including main ruler and vice ruler, the surface of main ruler is equipped with vernier caliper, the bottom of vice ruler is provided with connecting assembly, the connecting assembly includes control rod and square frame, the control rod slidingly connects on the inner wall of main ruler, the bottom fixed connection of control rod has pull rope, the one end fixed connection of pull rope away from control rod has the clamping block, the clamping block is elastically connected with the inner wall of vice ruler through reset spring, the bottom of vice ruler is provided with the protruding portion. In the utility model, through setting connecting assembly, realize the quick locking and connection of vice ruler and main ruler, need not external tool to complete fixed, thereby increase the range of measuring scale, and at the end of use, through pulling control rod, separate main ruler and vice ruler, thereby reduce the overall length of measuring scale, and further convenient to carry, improved the portability of measuring scale.

The application discloses a universal pressure sensor, which comprises a pressure seat provided with a measuring hole at the bottom end, and a shell fixedly connected with the top edge of the pressure seat at the bottom end, wherein the top end of the pressure seat is provided with a limiting groove, the opening of the shell is downwardly arranged, the top end of the pressure seat and the inner wall of the shell enclose a cavity, the top end of the pressure seat is fixedly provided with a binding plate and a strain gauge, the binding plate is provided with mounting holes and limiting holes, the strain gauge is arranged in the mounting hole, a metal wire is arranged between the strain gauge and the binding plate, a compensation plate is arranged above the binding plate and fixedly connected with the binding plate through a support, the lower end of the support is provided with a limiting block and a containing cavity, the limiting block is inserted into the limiting groove through the limiting hole, the opening of the containing cavity is downwardly arranged to contain the strain gauge and the metal wire, and a plurality of vertical wires are fixedly connected with the compensation plate. The application improves the overload capacity and the sealing performance of the pressure sensor and expands the range of the pressure sensor.

The present application provides a displacement detection device, system and method, which relate to the technical field of wire-controlled steering. The displacement detection device includes an induction block arranged on a ball screw of a wire-controlled steering system; a plurality of induction coils within a set range of the distance induction block, the induction block moves axially along the ball screw driven by the ball screw, the plurality of induction coils transmit detected electrical signals to corresponding sensor chips, and the sensor chip converts the electrical signals into displacement signals; displacement detection of different precisions and ranges is achieved by induction coils of different lengths, so that the combination of coils of different lengths can simultaneously meet the requirements of large range and high precision.

The invention relates to a sensor for measuring the hydrogen content in water. The sensor comprises a detection cavity, and a hydrogen permeation membrane, a reference motor shell, a reference electrode, a signal acquisition circuit, a working electrode, a glass tube and a counter electrode which are arranged in the detection cavity. The glass tube is located outside the working electrode, and the axis of the working electrode coincides with the axis of the glass tube. The counter electrode is located outside the glass tube, and the axis of the counter electrode coincides with the axis of the glass tube. The reference electrode is positioned on the opposite side of the working electrode, the glass tube and the counter electrode. The reference electrode shell is located outside the reference electrode, and the reference motor shell and the reference electrode coincide in axis. And the signal acquisition circuit is positioned below the reference motor shell, the reference electrode, the working electrode, the glass tube and the counter electrode. All detection devices are integrated in the detection cavity, so that the technical problem that online water quality detection cannot be realized by a dissolved hydrogen content detection method is solved.

The embodiment of the present invention provides a differential Hall current sensor and a manufacturing method thereof, belonging to the field of semiconductor technology. The differential Hall current sensor includes: a substrate; a magnetic yoke, having a semi-enclosed structure consisting of a bottom surface and two side surfaces located on the same side of the bottom surface, and the bottom surface is bonded to the substrate; a current row, placed in the cavity of the semi-enclosed structure and allowing the two ends of the current row to extend from the semi-enclosed structure; an insulating layer, arranged on the upper surface of the current row and located in the cavity; at least two Halls, symmetrically arranged on both sides of the upper surface of the insulating layer along the current direction; at least two groups of magnetic concentrators, arranged against the magnetic sensing surfaces of at least two Halls; at least two groups of magnetic concentrators and the magnetic yoke form a conductive magnetic circuit, which deflects the magnetic field component of the current magnetic field in the direction parallel to the magnetic sensing surface into the magnetic field component in the perpendicular direction thereof. The differential Hall current sensor of the present invention enhances the Hall-perceivable magnetic field strength and improves the measurement sensitivity by concentrating the conductive magnetic circuit of the current magnetic field.