35results about How to "Sensitive to temperature changes" patented technology

An inductor based DC-DC converter of the present invention employs two power switches such that only a fraction of inductor current flows through sensing circuitry. The sensing circuitry itself is comprised of sense transistors instead of resistors in order to further reduce power dissipation and temperature variations. The sensing circuitry includes a differential power supply that modifies a sense current employed as feedback to one of its inputs. The sense transistors are selected and configured such that the sense current is a relatively constant fraction of the inductor current of the converter.

An inductor based DC-DC converter of the present invention employs two power switches such that only a fraction of inductor current flows through sensing circuitry. The sensing circuitry itself is comprised of sense transistors instead of resistors in order to further reduce power dissipation and temperature variations. The sensing circuitry includes a differential power supply that modifies a sense current employed as feedback to one of its inputs. The sense transistors are selected and configured such that the sense current is a relatively constant fraction of the inductor current of the converter.

A temperature transducer of fibre - optical evanescent wave in high sensitivity consists of light source, detector and signal processing unit as detector probe is prepared by pyrometric cone type of fibre - optical coupler with one coupling fibre - optical pyrometric cone section connected to light source and one detector, another section to the other detector for varying output spectral ratio of coupler to obtain data of temperature change through conversion. The pyrometric cone type of fibre - optical coupler is prepared by melting two optical fibres and then drawing molten material to be cone form.

The invention discloses a cement-based temperature sensing element for positive and negative temperature automatic measurement. The cement-based temperature sensing element comprises a test block and a pair of electrodes, wherein, the electrodes are respectively positioned on the upper surface and the lower surface of the test block, and the test block comprises a cement matrix and conductive fiber which is evenly distributed in the cement matrix; the cement matrix comprises alite-barium calcium sulphoaluminate cement and sand; and the conductive fiber is composed of chopped polypropolefin carbon fiber and a carbon nanotube. The cement-based temperature sensing element of the invention has the beneficial effects: 1. the alite-barium calcium sulphoaluminate cement is taken as the cement matrix, and the carbon nanotube expands the temperature measurement range of the temperature sensing element below a freezing point; and 2. the capacitive signal of the sensing element is sensitive to temperature change, thus stable data can be acquired through multiple repeated measurement.

A glass optical reflective tap is described that optically connects two optical fibers and may tap a portion of the light that is being communicated between the optical fibers. In one embodiment of the invention, the optical filter includes two D-lenses that operate as focusing or collimator lenses. The first D-lens focuses an optical signal onto a tap filter that allows a majority of the light within an optical signal to pass and also reflects a small portion of optical signal light to a reflective port. The second D-lens focuses the passed light into a transmission port of an optical fiber.

The invention discloses a contact type bimetallic strip temperature controller. The controller comprises a shell, a bottom plate and a bimetallic strip; the shell is arranged on the bottom plate and is fixedly connected with the bottom plate; a protruding part is arranged in the middle of the shell; the bimetallic strip is fixedly arranged at the top of the convex part; a vertical through hole isformed in the convex part; an ejector rod is inserted into the vertical through hole in a penetrating mode; a first terminal is arranged at one end of the bottom plate; an elastic piece is connected to one end of the first terminal; a first contact and a second contact are arranged on the elastic piece; a second terminal is arranged at the other end of the bottom plate; the second terminal and thefirst terminal are symmetrical; and a third contact is arranged at one end of the second terminal and matched with the second contact in an abutting mode. The controller is small in size and can be applied to small or micro electric appliances.

A glass optical filter is described that optically connects two optical fibers and may filter a single or group of channels from a WDM signal that is being communicated between the optical fibers. The glass optical filter may be comprised of two pigtail tubes having smaller interior diameters than a center piece tube that couples the two pigtail tubes together. In one embodiment of the invention, D-lenses are positioned within the glass optical filter and function as focusing lenses. The characteristics of the glass housing and D-lens provide a preferred environment for aligning optical fiber pigtails to the focusing lenses.

The invention provides a fixing support for a temperature sensing element for a compressor and the compressor. The fixing support for the temperature sensing element comprises a mounting part and an elastic gland, wherein the mounting part is provided with a mounting surface used for being connected with a compressor shell body, the elastic gland is provided with a side part connected with the mounting part and the other side part opposite to the side part, a distance is formed between the other side part and the plane where the mounting surface is located in the vertical direction, and the bottom surface of the elastic gland is an inner concave surface extending from one side part to the other side part. The fixing support for the temperature sensing element is directly mounted on the compressor shell body through the temperature sensing element, so that the effective temperature sensing part, namely a head of the temperature sensing element, of the temperature sensing element makes direct contact with the compressor shell body, the effective temperature sensing part can directly sense the temperature of the compressor shell body, the temperature sensing mode is more sensitive to temperature changes of the compressor, and temperature sensing is more accurate so that a control system of an air conditioner can take protection measures in time according to the sensed temperature, and the compressor can be protected more effectively.

The invention discloses a phase-change temperature-control tile and a production method thereof. The tile is composed of a tile matrix, a phase-change temperature-control layer, and a water proof layer, wherein, the tile matrix comprises the following raw materials in parts by weight: 12-25 parts of iron mine tailing, 20-30 parts of a clay mine, 25-45 parts of waste ceramic material, 1-2 parts of carbonized silica micropowder, 10-15 parts of magnesite mine tailing, and 3-8 parts of quartz sand; the phase-change temperature-control layer is prepared by the bonding agent and a phase-transition material coated by metal organic framework according to the weight ratio of 10:1-2; the water proof layer is obtained by solidifying a heat-conduction filling material-contained aqueous resin emulsion, and the heat-conduction filling material is one of nano zinc oxide, nano titanium dioxide, and nano silica.

The invention discloses a point type temperature sensing fire detector. The detector is provided with an upper cover, a hollow printed circuit board tightly attached to the upper cover, a middle baseclamped with the upper cover and a base clamped with the middle base in a threaded mode from top to bottom in sequence. The printed circuit board is arranged in a containing groove formed in the middle base, two open holes of the middle base are matched with two pins of the base in an inserted mode, and the two open holes make contact with two electrical connection bonding pads on the printed circuit board through base pin elastic pieces and are communicated with an external bus power source. Airflow enters and passes through the hollow printed circuit board through the diversion trench of theupper cover, so a patch thermosensitive element on the printed circuit board is in full contact with the airflow. When the temperature of the airflow is sensed to be abnormal, the light-emitting diode indicating lamp is lightened through the temperature collecting and processing circuit on the printed circuit board, and an alarm signal is transmitted to the fire alarm controller through the bus.And the surface-mounted element is adopted, so that the material cost and the labor cost are reduced, the temperature change is sensed more quickly, and the fire early-warning capability of the detector is improved.

The invention discloses a high-temperature-resistant wireless temperature measuring device, which comprises a temperature sensor and a temperature measuring terminal, wherein the temperature sensor and the temperature measuring terminal are arranged separately. As the temperature sensor and the temperature measuring terminal are separated, the temperature sensor is closer to a temperature measuring point, so that higher temperature measuring precision is achieved, the temperature sensor is more flexible to install and less susceptible to space limitation and can be used for measuring temperature in real time.

The invention discloses a high-stability temperature sensor for body temperature monitoring and a preparation method thereof, and belongs to the field of temperature sensors. After a certain amount of soy isoflavone and butylated hydroxytoluene are introduced into an organic semiconductor layer, the service life of a device is remarkably prolonged by utilizing the oxidation resistance and hydrophobicity of the soy isoflavone and butylated hydroxytoluene to grease, and the stability of the device is enhanced. Compared with an existing packaged transistor type skin sensor, due to the fact that soy isoflavone and butylated hydroxytoluene are introduced, secondary packaging of the device is avoided, the thickness of the transistor device is effectively reduced, and miniaturization of the sensor is achieved; and after butylated hydroxytoluene is introduced into the organic semiconductor layer, the morphology of the organic semiconductor layer film is effectively changed, and the defect state density of the organic semiconductor layer is reduced.

The invention provides a low temperature dry body temperature calibrator for temperature calibration on a to-be-detected temperature component. The low temperature dry body temperature calibrator comprises a modularly-designed furnace body, a control board assembly, a system board assembly and a shell, wherein the system board assembly is assembled on the front side surface of the shell; the furnace body and the control board assembly are assembled in the shell; the top surface of the shell is provided with a plurality of cooling holes and is provided with a through hole which is flush with the mouth of the furnace body for accommodating the to-be-detected low temperature component; a gap exists between the top part of the control board assembly and the top surface of the shell; the top part of the control board assembly is provided with a diversion fan; and a deflector that is inclined toward the cooling holes in the top surface of the shell is arranged above the diversion fan. By adopting the modular design, the furnace body and other assemblies and parts can be disassembled independently, and the production and maintenance convenience is thus effectively improved; and the furnace body has a compact structure, the used cooler is light in weight, the cooling efficiency is high, the furnace body working stability and the temperature measurement precision are improved, and the low temperature dry body temperature calibrator is applicable to temperature measurement for the to-be-detected low temperature component.

The invention relates to a preparation method of a temperature sensitive poly(N-isopropyl acrylamide) / graphene composite material. The preparation method comprises the following steps: pre-reducing agraphene oxide dispersion solution, and adding aryl diazonium salt of sulphanilic acid to sulfonate for secondary reduction to obtain an aqueous graphene oxide dispersion solution; and then mixing N-isopropyl acrylamide, ethylene glycol, ethanol, an initiator and a catalyst and adding a curing agent to cure. The preparation method has the advantages of being efficient and feasible, suitable for being prepared in a large area on a large scale and the like. The obtained composite material has relatively high temperature sensitivity, and the resistance of the composite material is obviously reduced along with rise of temperature. The sensitivity can reach -4% / DEG C.

The invention discloses a dynamic temperature control beehive based on a microprocessor and a digital sensor. According to the beehive, the temperature in the beehive is specifically and dynamically adjusted in real time according to different temperature ranges needed by honey production and reproduction of bees. The beehive comprises a traditional beehive, a digital temperature sensor, a dynamictemperature control circuit box, a cooling system and a heating system. The STC89C52 microprocessor and the digital temperature sensor collect and control the temperature in the beehive, and the temperature is transmitted to a computer by an NRF905 wireless module. Upper temperature limit and lower temperature limit are set according to the temperature suitable for honey producing and reproduction of the bees. When the temperature in the beehive is higher than the upper temperature limit, the microprocessor controls a buzzer to give an alarm, and the cooling system is started to reduce the temperature in the beehive. When the temperature in the beehive is lower than the lower temperature limit, the microprocessor controls the buzzer to give an alarm, and the heating system is started to increase the temperature in the beehive. The computer receives transmitted temperature data by combining the wireless module and a VC++6.0 programming interface, and the temperature in the beehive is wirelessly monitored, adjusted and controlled.

The invention discloses a mini-host computer CPU radiator. The mini-host computer CPU radiator comprises a mini-computer host case and a compressor. A water-cooling heat dissipation device is arrangedat the CPU, and a water inlet pipe and a first water outlet pipe are connected to the water-cooling heat dissipation device; the water inlet pipe penetrates through the mini computer host case to beconnected with the compressor, and an expansion valve is arranged on the water inlet pipe; a heat dissipation coil is arranged on the outer side of the mini computer host case, one end of the heat dissipation coil is connected with the first water outlet pipe, and the other end of the heat dissipation coil is connected with the compressor through a second water outlet pipe; a first separable valvegroup and a second separable valve group are respectively arranged on the second water outlet pipe and the water inlet pipe; the separable valve set comprises a first valve and a second valve, a first flange is arranged on the right side of the first valve, a second flange is arranged on the left side of the second valve, and the first valve and the second valve are hermetically connected throughflanges; cooling media are arranged in the compressor and the water pipes. The LED lamp has the advantages of being small in size and good in heat dissipation performance.

The invention discloses a method for simultaneous separation of T and B lymphocytes in peripheral blood. The method is an improved nylon wool column separation method, can realize one-time simultaneous separation, so that two kinds of lymphocytes, namely T and B lymphocytes are obtained, cell yield is high, cross contamination is less, there is no effect on the biological activity of the cells, and the next step of the experimental study is easy to carry out.

The invention discloses a precise adjustable liquid expansion temperature controller, and the controller comprises a switch assembly and a liquid closed power system arranged on the switch assembly and used for generating switch driving quantity matched with a switch. According to the precise adjustable liquid expansion temperature controller, through the liquid intangibility and uniform moleculardistribution, the temperature is sensitive to temperature changes, the volume expansion coefficient is high, and an elastic energy conversion diaphragm capsule is combined, so the tiny change of thetemperature can be converted into a corresponding displacement and force; a temperature control probe is directly contacted with an equipment working environment, and no indirect energy transmission component is arranged in the middle; the temperature is converted into a temperature variable (heat energy) by the diaphragm capsule and is directly applied to the switch contact assembly; by means ofthe structure, tiny temperature changes of the control environment can be converted through the diaphragm capsule and transmitted to the switch assembly, so the problem of energy inconsistency causedby energy transmission loss in the liquid expansion temperature control process and part deviation is solved, the one-to-one relation of energy transmission is achieved, precise temperature control over equipment is achieved, and better use prospects are brought.

The invention provides a low temperature furnace body and a low temperature dry body temperature calibrator comprising the same. The furnace body comprises a furnace core and a cooling fan; the cooling fan is placed under the furnace core; the furnace core comprises a foaming heat insulator, a constant temperature block arranged inside the foaming heat insulator and integrally foamed, a heat equalizing block installed in the constant temperature block, coolers fixed at two sides of the foaming heat insulator and cooling sheets; and one side of the cooling sheet is contacted with the constant temperature block and the other side is contacted with the heat end of the cooler. The cross section of the constant temperature block in the furnace body is set to be in a shape of an hourglass with two ends wide and the middle narrow, the constant temperature block is light in weight, small in heat capacity and sensitive to temperature changes, and the cooling sheet is large in size and good in cooling effects; and the low temperature dry body temperature calibrator adopts a modular design, the furnace body structure is reasonably laid, the structure is compact, and due to the independent sealing design of two air channels, the furnace body working stability and the temperature measurement precision are improved, and temperature measurement of a low temperature tested device is facilitated.

The invention provides a reaction kettle device capable of controlling the synthesis temperature of an accelerant 2-mercaptobenzothiazole (MBT). An original high-pressure synthesis kettle is improved; a coil pipe is additionally arranged into the high-pressure synthesis kettle; the height of the coil pipe is 1 / 2-2 / 3 of that of a kettle body; the diameter of the coil pipe is 0.7-0.9 time that of the kettle body; an inlet and an outlet of the coil pipe are connected with a heat conduction oil inlet / outlet pipeline by seal heads of the kettle body. After the high-pressure kettle is fed, heat conduction oil is fed into the coil pipe in the reaction kettle for heating the reaction material. The temperature of the inlet heat conduction oil is controlled to be within the range of 240-250 DEG C; the reaction temperature is controlled to be within the range of 250-260 DEG C, and the reaction time is controlled to be 120-180 minutes. In a reaction process, the heat conduction oil is directly fed into the reaction kettle, so that the heat transfer resistance is reduced, and the heat transfer efficiency is improved; furthermore, the coil pipe is additionally arranged into the reaction kettle, so that internal mass transfer is enhanced, the temperature in the reaction kettle is uniform, the phenomenon of overheating is avoided, and the reaction promoting generation of the MBT can be carried out.

The invention relates to an optical fiber structure for temperature detection, a manufacturing method and a temperature detection system, and belongs to the technical field of detection. The structure mainly comprises two single-mode optical fibers and a coreless optical fiber arranged between the two single-mode optical fibers. The coreless optical fiber is arranged to be of a structure with the middle thin and the two ends thick, and the coreless optical fiber and the two single-mode optical fibers are coaxial. The two ends of the coreless optical fiber in the length direction are respectively welded with the end parts of the single-mode optical fibers, a capillary quartz tube sleeves the coreless optical fiber, the middle parts of the capillary quartz tube and the coreless optical fiber are filled with polydimethylsiloxane, and two ends of the capillary quartz tube in the length direction are respectively connected with the single-mode optical fibers in a sealing manner.

The invention relates to an aluminum powder wax-wrapped pill for a thermoregulator of an automobile engine, which is characterized in that the wax-wrapped pill is a mixture of aluminum powder and paraffin wax, and takes the shape of a cylinder provided with a dead hole; and the weight ratio of the paraffin wax to the aluminum powder is 1 to 0.4-1. The aluminum powder wax-wrapped pill not only can sensitively sense the temperature variation of the engine but also is difficult to separate after being subjected to thermal expansion and cold shrinkage for tens of thousands times due to the characteristic of light specific gravity of the wax-wrapped pill, so that the service life of the thermoregulator is prolonged. Simultaneously, because the aluminum powder used is flaky aluminum powder and the solubility and the fluidity of the aluminum powder are superior to those of other metalloid such as copper powder, the aluminum powder is easy to form when being mixed with the paraffin wax, and the weight precision is easy to control; and the aluminum powder wax-wrapped pill has the advantages of low cost, high profit and long service life.

The invention discloses a condenser structure for receiving wine at a high temperature. The condenser structure comprises a cooling water bucket and a condenser, wherein the condenser is arranged in the cooling water bucket; the cooling water bucket is composed of a bucket body, a bucket cover and an inner cavity of the bucket body; the inner cavity of the bucket body is formed at the inner side of the bucket body; the bucket cover is arranged at the top of the bucket body; condensate water discharge pipes of the bucket body are evenly arranged on the bucket body; condensate water discharge pipes of the bucket cover, which are communicated with the condensate water discharge pipes of the bucket body, are arranged on the bucket cover; a condenser comprises a condenser bottom plate, a condenser top plate and a heat exchange tube; the heat exchange tube is arranged between the condenser bottom plate and the condenser top plate; a cavity for accommodating an inner cavity of the bucket body is formed in the heat exchange tube along the condenser bottom plate and the condenser top plate; an air guide pipe is arranged in the middle of the condenser top plate; an isolation plate is arranged at the bottom of the condenser top plate; and the cooling water bucket is divided into an upper layer and a lower layer by the isolation plate. According to the condenser structure, the cooling water is saved; the temperature rise during water cooling is fast; the temperature change is sensitive and easy to control; and the discharged wine temperature required by the technology can be timely ensured.

The invention discloses a method for simultaneous separation of T and B lymphocytes in peripheral blood. The method is an improved nylon wool column separation method, can realize one-time simultaneous separation, so that two kinds of lymphocytes, namely T and B lymphocytes are obtained, cell yield is high, cross contamination is less, there is no effect on the biological activity of the cells, and the next step of the experimental study is easy to carry out.

The invention provides an acetabular prosthesis, a hip joint prosthesis and an implantation method of the acetabular prosthesis, relating to the technical field of artificial joints. The acetabular prosthesis comprises an acetabular base and a nickel-titanium wire support. The acetabular base was semicircular. The outer surface of the acetabular base is connected with one end of the nickel-titanium wire support part, and the other end of the nickel-titanium wire support part is attached to the outer surface of the acetabular base. The phase transition temperature of the nickel-titanium wire support part is in the range of 37 DEG C to 50 DEG C. The problem that the initial fixation and long-term fixation of the existing hip joint prosthesis are not firm is solved. The nickel-titanium wire support part of the invention has biological safety. The external surface of acetabular prosthesis is implanted into the acetabular fossa of human body, and the nickel-titanium wire support can be inserted into the bone gap of acetabular fossa of human body at a certain temperature, so as to achieve the effect of initial fixation and long-term fixation firmly.

The invention relates to the field of chemical industry, in particular to a method for purifying vinyl acetylene; the method comprises the following steps: step 1: passing an absorption liquid obtained by a degassing tower into a desorption tower from the middle of a degassing tower; The absorption liquid is heated, and the gas at the top of the analysis tower is cooled, and part of the gas is condensed and refluxed; Step 3: Detect the temperature of the liquid at the fifth tray from the bottom to the top of the analysis tower from the feeding port, and when the temperature is higher than 18 At ~22°C, increase the condensation reflux at the top of the desorption tower until the above temperature is lower than 10 to 14°C; Step 4: Remove the water in the liquid above the fourth plate from the bottom to the top from the feeding port, and apply the same to the desorption tower. The uncondensed gas at the top is collected. The purification method of this scheme removes the water in the desorption solution while rectifying vinylacetylene, so as to prevent the water from lowering the boiling point of the organic phase, thereby reducing the divinylacetylene in the product gas.

The invention discloses a grained electrode composite with positive temperature coefficient and the preparing method thereof. And the composite comprises kernel of active material and PTC shell, where the kernel mainly makes electrochemical reaction and provides battery capacity and the PTC mainly plays the role in safety protection of positive temperature coefficient. And the electrode made by the composite can sense temperature variation caused by overcurrent and short circuit in battery and in time increase impedance and reduce current to make the battery be in a safe state, preventing battery exploding or burning. When the battery temperature returns to normal, the resistance of the composite returns to lower value, assuring normal battery charge and discharge; and the composite has higher sensitivity and lower resistance value.

The present disclosure relates to a metallic shaft for connecting components of a gas turbine engine. Example embodiments include a metallic shaft (400) for connecting components of a gas turbine engine, the shaft (400) having a longitudinal axis (410) and comprising: a first section (401) extending from a first end (403) of the shaft (400) to a joint (405), the first section (401) composed of a material having a first thermal expansion coefficient along the longitudinal axis (410); a second section (402) extending from a second opposing end (404) of the shaft to the joint (405), the second section (402) composed of a material having a second thermal expansion coefficient along the longitudinal axis (410) that is different to the first thermal expansion coefficient.

A temperature transducer of optical fiber fade-down wave in networked structure consists of optical source, 1xN optical fiber coupler, detector, signal processing unit and multiple temperature sensor of optical fiber fade-down wave. It is featured as applying pyromatric cone sensing 1x2 optical fiber coupling component as temperature sensor, using comb structure as connection mode for making measurement on multipoint-temperature.