Passive wireless temperature sensor

Abstract

According to the passive wireless temperature sensor, the output end of a thermoelectric battery module is electrically connected with the input end of a power management module, the output end of the power management module is electrically connected with a temperature detection module, a control module and a wireless transmission module, and the control module is electrically connected with the temperature detection module and the wireless transmission module; the thermoelectric battery module is arranged on the surface of the waste heat pipeline and used for generating electric energy under the temperature difference effect and transmitting the electric energy to the power management module. The power management module is used for transmitting electric energy to the temperature detection module, the control module and the wireless transmission module. The temperature detection module is used for collecting environment temperature to obtain temperature information; the control module is used for obtaining temperature information collected by the temperature detection module and sending the temperature information to the outside through the wireless transmission module. The problems that a sensor cannot be wired in a dangerous explosion operation area, a high-capacity lithium battery cannot be used, and maintenance-free and unattended operation is achieved are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of petrochemical temperature monitoring equipment, and particularly relates to a passive wireless temperature sensor. BACKGROUND

[0002] Temperature sensors are widely used in the industrial field, can monitor the pipeline temperature of different process links, control the process operation state in real time, find the leakage point in time, and avoid energy loss. However, in the petrochemical industry, power lines cannot be arranged in many dangerous and explosive production areas, and wired temperature sensors are difficult to apply. Most wireless temperature sensors use large-capacity lithium batteries for power supply, and large-capacity lithium batteries themselves are also dangerous sources and cannot be used in dangerous and explosive areas. Therefore, in these dangerous and explosive operation areas, temperature sensors cannot be arranged, and real-time supervision of working conditions is a weak link, but real-time supervision of these areas is more important.

[0003] Therefore, it is urgent to develop a passive wireless temperature sensor applied to dangerous and explosive operation areas to realize real-time monitoring of working conditions. SUMMARY

[0004] The technical problem solved by the present application is to provide a safe passive wireless temperature sensor for dangerous and explosive operation areas in the petrochemical industry and the like, to supervise the process working condition in real time, and to realize maintenance-free and unattended.

[0005] A passive wireless temperature sensor comprises a thermoelectric battery module, a power management module, a temperature detection module, a control module and a wireless transmission module.

[0006] The output end of the thermoelectric battery module is electrically connected with the input end of the power management module, the output end of the power management module is electrically connected with the temperature detection module, the control module and the wireless transmission module respectively, and the control module is electrically connected with the temperature detection module and the wireless transmission module.

[0007] The thermoelectric battery module is arranged on the surface of a waste heat pipeline, and is used for generating electric energy under the action of temperature difference and delivering the electric energy to the power management module.

[0008] The power management module is used for delivering the electric energy to the temperature detection module, the control module and the wireless transmission module respectively.

[0009] The temperature detection module is used for collecting ambient temperature to obtain temperature information.

[0010] The control module is used for acquiring the temperature information collected by the temperature detection module and sending the temperature information to the outside through the wireless transmission module.

[0011] In one of the embodiments, the thermoelectric battery module comprises a heat dissipation component, a thermoelectric component and a heat collection component, the thermoelectric component is electrically connected with the power management module, the heat collection component and the heat dissipation component are respectively arranged on two sides of the thermoelectric component, a fin is arranged on a side of the heat dissipation component facing away from the thermoelectric component, and the heat collection component is provided with a heat pipe which is inlaid in a steam pipeline heat insulation bracket.

[0012] In one of the embodiments, the thermoelectric component comprises a first thermoelectric component and a second thermoelectric component, the first thermoelectric component and the second thermoelectric component are respectively arranged on two sides of the heat collection component, the heat dissipation component comprises a first heat dissipation component and a second heat dissipation component, the first heat dissipation component is arranged on a side of the first thermoelectric component facing away from the heat collection component, the second heat dissipation component is arranged on a side of the second thermoelectric component facing away from the heat collection component, and the fins are respectively arranged on sides of the first heat dissipation component and the second heat dissipation component facing away from each other.

[0013] In one of the embodiments, the number ratio of the heat pipe to a single thermoelectric component is 1:1-6:1.

[0014] In one of the embodiments, the thickness of the heat collection component is 1-20 mm.

[0015] In one of the embodiments, the fin is arranged in at least one of the following structures:

[0016] The thickness of the fin is 0.5-2 mm;

[0017] The height of the fin is 20-100 mm;

[0018] The gap of the fin is 0.5-5 mm.

[0019] In one of the embodiments, the power management module comprises a processing unit and an energy storage unit.

[0020] The processing unit is electrically connected with the first thermoelectric component and the second thermoelectric component, and is used for boosting and stabilizing the voltage generated by the first thermoelectric component and the second thermoelectric component.

[0021] The energy storage unit is electrically connected with the processing unit, and is used for storing electric energy and delivering electric energy to the temperature detection module, the control module and the wireless transmission module.

[0022] In one of the embodiments, the shape of the fin is needle-shaped.

[0023] In one of the embodiments, the bottom end of the fin is provided with a rotating shaft, which is rotatably connected with the base plate, two adjusting holes are formed on the fin, and the first adjusting rod and the second adjusting rod are respectively arranged in the two adjusting holes, the end of the first adjusting rod is provided with a first connecting seat, the end of the second adjusting rod is provided with a second connecting seat, the rotating rod is rotatably arranged on the first connecting seat, and the rotating ring is rotatably arranged on the second connecting seat.

[0024] In one of the embodiments, the fixing assembly comprises a limiting screw arranged in the rotating ring, a threaded hole is formed in the rotating ring, the limiting screw is threadedly arranged in the threaded hole, and the end of the limiting screw penetrating through the threaded hole is abutted against the side surface of the rotating rod.

[0025] The passive wireless temperature sensor utilizes the heat pipe arranged on the heat insulation bracket of the steam pipeline to transmit the heat energy to the thermoelectric component through the heat collecting component. The first heat dissipating component and the second heat dissipating component dissipate heat to the side surface of the thermoelectric component, so that the thermoelectric component generates temperature difference on the two sides thereof facing the heat collecting component and the heat dissipating component. The thermoelectric semiconductor material generates direct current potential difference on the positive and negative electrodes of the thermoelectric component through the Seebeck effect, and the direct current potential difference is transmitted to the power management module for storage, so that the power management module can provide working power for the temperature detection module, the control module and the wireless transmission module. The problems that the traditional sensor cannot be wired in the dangerous and explosive operation area and cannot use large-capacity lithium batteries are solved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The system diagram of the passive wireless temperature sensor is shown in the figure.

[0027] Figure 2 The three-dimensional exploded diagram of the structure of the thermoelectric battery module in the preferred embodiment is shown in the figure.

[0028] Figure 3 The display figure of one of the embodiments of the heat dissipating component is shown in the figure.

[0029] Figure 4 The display figure of one of the embodiments of the heat dissipating component is shown in the figure.

[0030] Figure 5 The display figure of one of the embodiments of the heat dissipating component is shown in the figure. Figure 4 The partial three-dimensional exploded diagram of the heat dissipating component in the embodiment is shown in the figure. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0032] In one embodiment, as shown in Figure 1 a passive wireless temperature sensor is provided, comprising a thermoelectric battery module 100, a power management module 200, a temperature detection module 300, a control module 400 and a wireless transmission module 500;

[0033] The output end of the thermoelectric battery module 100 is electrically connected to the input end of the power management module 200, and the output end of the power management module 200 is electrically connected to the temperature detection module 300, the control module 400 and the wireless transmission module 500 respectively, and the control module 400 is electrically connected to the temperature detection module 300 and the wireless transmission module 500;

[0034] The output end of the thermoelectric battery module 100 is electrically connected to the input end of the power management module 200, and the output end of the power management module 200 is electrically connected to the temperature detection module 300, the control module 400 and the wireless transmission module 500 respectively, and the control module 400 is electrically connected to the temperature detection module 300 and the wireless transmission module 500;

[0035] The thermoelectric battery module 100 is arranged on the surface of the waste heat pipeline, and is used to generate electric energy under the action of temperature difference, and deliver the electric energy to the power management module 200;

[0036] The power management module 200 is used to deliver the electric energy to the temperature detection module 300, the control module 400 and the wireless transmission module 500 respectively;

[0037] The temperature detection module 300 is used to collect the ambient temperature and obtain temperature information;

[0038] The control module 400 is used to obtain the temperature information collected by the temperature detection module 300, and send the temperature information to the outside through the wireless transmission module 500.

[0039] In this embodiment, the thermoelectric battery module 100 is installed on the surface of the waste heat pipe, and a component of the thermoelectric battery module 100 is installed at the insulation bracket of the steam pipe. The temperature of the insulation bracket of the steam pipe is between 45℃ and 90℃, making conventional thermoelectric batteries unsuitable. The thermoelectric battery module 100 absorbs the heat energy from the insulation bracket and transfers it to its interior, causing the internal temperature of the thermoelectric battery module 100 to rise. Since the temperature at the waste heat pipe is lower than the internal temperature of the thermoelectric battery, a temperature difference is created between the inside and outside of the thermoelectric battery module 100, thereby generating electrical energy within the thermoelectric battery module 100. This solves the problem of not being able to use large-capacity batteries or lay cables to transmit electrical energy in high-temperature areas. The power management module 200 is electrically connected to the thermoelectric battery module 100, and the power management module 200 obtains, processes, and stores electrical energy from the thermoelectric battery module 100. The output of the power management module 200 is electrically connected to the temperature detection module 300, the control module 400, and the wireless transmission module 500, respectively, providing the necessary power for their normal operation. The temperature detection module 300 monitors the temperature of the steam pipeline in real time, and uploads the temperature information to the control module 400. The control module 400 processes the temperature information and transmits it to the backend of the terminal 600 via the wireless transmission module 500.

[0040] In one embodiment, such as Figure 2 As shown, the thermoelectric battery module 100 includes a heat dissipation component 110, a thermoelectric component 120, and a heat collection component 130. The thermoelectric component 120 is electrically connected to the power management module 200. The heat collection component 130 and the heat dissipation component 110 are respectively disposed on both sides of the thermoelectric component 120. Fins 112 are disposed on the side of the heat dissipation component 110 facing away from the thermoelectric component 120. The heat collection component 130 is provided with a heat pipe, which is used to be embedded in the steam pipe insulation bracket.

[0041] In this embodiment, the heat pipe is tubular or sheet-shaped, and is embedded in the heat-insulating bracket of the steam pipe, and is used to absorb heat energy at the heat-insulating bracket. By using the characteristic of the heat pipe that can quickly transfer heat energy, the heat energy is transferred to the heat collecting assembly 130 and heats the heat collecting assembly 130. By locating the heat collecting assembly 130 on one side of the hot surface end of the thermoelectric component 120, the heat collecting assembly 130 with a higher temperature raises the temperature of the hot surface end of the thermoelectric component 120. The side of the thermoelectric component 120 away from the heat collecting assembly 130 is the cold surface end, and the heat dissipating assembly 110 is installed on the cold surface end, which includes a base plate 111 and fins 112 uniformly distributed on one side of the base plate 111. The side of the base plate 111 without the fins 112 is provided with a groove for positioning and assembling the thermoelectric component 120. The thickness of the base plate 111 is 5 mm, and the length is 55 mm. The fins 112 in the heat dissipating assembly 110 can increase the contact area of the heat dissipating assembly 110 with air, improve the heat exchange efficiency between the heat dissipating assembly 110 and air, and accelerate the temperature drop of the side of the cold surface end of the thermoelectric component 120, so as to finally generate a temperature difference between the cold surface end and the hot surface side of the thermoelectric component 120. The thermoelectric component 120 is made of a hot semiconductor material, and uses the Seebeck effect of the thermoelectric semiconductor material to generate electric energy inside the thermoelectric component 120. The heat dissipating assembly 110, the thermoelectric component 120 and the heat collecting assembly 130 are connected through the fastening assembly 140, which includes bolts, sealing rings and nuts. The heat dissipating assembly 110, the thermoelectric component 120 and the heat collecting assembly 130 are assembled by clamping.

[0042] In one embodiment, as shown in FIG. 1, the fins 112 are needle-shaped. Figure 3

[0043] In this embodiment, the thermoelectric battery module 100 mainly uses the external environment as the cold end, so that the heat energy of the heat collecting assembly 130 is transferred to the environment through the heat dissipating assembly. The heat dissipating assembly 110 mainly uses the natural air flow to take away the heat energy, and the wind direction in different seasons differs greatly. The first fins and the second fins are designed to be needle-shaped, which can increase the gap between the fins 112, and is conducive to allowing the air flowing in different directions to enter the gap between the first fins or the second fins, thereby improving the heat dissipation capacity of the heat dissipating assembly 110 in different seasons and increasing the temperature difference between the two sides of the heat collecting assembly 130. At the same time, the needle-shaped design of the first fins and the second fins can reduce dust deposition. It is worth mentioning that the annual power generation of the traditional thermoelectric battery module with fin structure is 3.07 degrees, and the annual power generation of the thermoelectric battery module with needle-shaped fin structure is 4.38 degrees, and the output power is increased from 350 mW to 500 mW. Compared with the traditional fin structure, the needle-shaped heat dissipation structure increases the output power generation by 42.7%.

[0044] In one embodiment, as shown in FIG. 1, the fins 112 are needle-shaped.​Figure 4 and Figure 5 As shown in the figure, the bottom end of the fin 112 is provided with a rotating shaft 113, the rotating shaft 113 is rotationally connected with the base plate 111, two adjusting holes 114 are opened on the fin 112, two adjusting holes 114 are respectively located on the two sides of the rotating shaft 113, a first adjusting rod 115 and a second adjusting rod 116 are respectively threaded in the two adjusting holes 114, the end of the first adjusting rod 115 is provided with a first connecting seat 1151, the end of the second adjusting rod 116 is provided with a second connecting seat 1161, a rotating rod 1152 is rotationally arranged on the first connecting seat 1151, a rotating ring 1162 is rotationally arranged on the second connecting seat 1161, the rotating ring 1162 is slidingly sleeved on the rotating rod 1152, and the rotating ring 1162 is provided with a fixing assembly for fixing the rotating rod 1152.

[0045] In this embodiment, the bottom of the fin 112 is provided with a rotating shaft 113, the rotating shaft 113 is located at the center of the bottom surface of the fin 112, the rotating shaft 113 is rotationally connected with the base plate 111, and the fin 112 can be adjusted to place the direction around the rotating shaft 113. Two adjusting holes 114 are opened through the surface of the fin 112, the adjusting holes 114 are circular, and the two adjusting holes 114 are respectively located on the two sides of the rotating shaft 113. The first adjusting rod 115 is threaded in one of the adjusting holes 114, and the second adjusting rod 116 is threaded in the other adjusting hole 114. The first adjusting rod 115 and the second adjusting rod 116 pass through each fin 112 in turn. The diameters of the adjusting holes 114 are greater than the diameters of the first adjusting rod 115 and the second adjusting rod 116. A plurality of limiting tubes 117 are sleeved on the first adjusting rod 115 and the second adjusting rod 116 respectively, the plurality of limiting tubes 117 are equidistantly distributed along the length direction of the first adjusting rod 115 or the second adjusting rod 116, and the plurality of limiting tubes 117 correspond to the plurality of fins 112 one by one. The diameter of the limiting tube 117 is smaller than the diameter of the adjusting hole 114, the limiting tube 117 is threaded in the adjusting hole 114, and the two ends of the limiting tube 117 are respectively provided with a limiting clip 1171, the diameter of the limiting clip 1171 is greater than the diameter of the adjusting hole 114, and the two limiting clips 1171 are respectively abutted on the two sides of the fin 112. The limiting tube 117 and the limiting clip 1171 are flexibly arranged.

[0046] The end of the first adjusting rod 115 is fixedly installed with a first connecting seat 1151, the surface of the first connecting seat 1151 is rotatably installed with a rotating rod 1152, the length of the rotating rod 1152 is greater than the minimum distance between the first adjusting rod 115 and the second adjusting rod 116. The end of the second adjusting rod 116 is fixedly installed with a second connecting seat 1161, a rotating ring 1162 is rotatably installed on the second connecting seat 1161, the rotating ring 1162 is sleeved on the rotating rod 1152, the fixing assembly on the rotating ring 1162 is used for fixing the rotating ring 1162 and the rotating rod 1152, and the rotating rod 1152 is limited to slide in the rotating ring 1162. The relative position between the first adjusting rod 115 and the second adjusting rod 116 is changed, so that the fins 112 rotate around the rotating shaft 113, the relative position of the fins 112 on the base plate 111 is changed, the gap between the fins 112 is directed to the direction of air flow, and air flows into the gap of the fins 112, so that more heat energy is taken away faster. When the rotating ring 1162 is fixed with the rotating rod 1152, the relative movement between the first adjusting rod 115 and the second adjusting rod 116 is limited, and the fins 112 remain in a fixed position.

[0047] In one embodiment, as shown in Figure 4 and Figure 5 The fixing assembly includes a limiting screw 1163 arranged in the rotating ring 1162, a threaded hole is formed through the rotating ring 1162, the limiting screw 1163 is threadedly arranged in the threaded hole, and one end of the limiting screw 1163 passing through the threaded hole abuts against the side surface of the rotating rod 1152.

[0048] In this embodiment, the fixing assembly is used for fixing the rotating rod 1152 and the rotating ring 1162, and limiting the relative sliding of the rotating rod 1152 and the rotating ring 1162. The limiting screw 1163 is threadedly arranged in the threaded hole, one end of the limiting screw 1163 passing through the threaded hole abuts against the side surface of the rotating rod 1152, and the friction between the limiting screw 1163 and the rotating rod 1152 is increased. When the limiting screw 1163 abuts against the side surface of the rotating rod 1152, the rotating ring 1162 is fixed with the rotating rod 1152, the relative position between the first adjusting rod 115 and the second adjusting rod 116 is fixed, and the fins 112 remain in a fixed state around the rotating shaft 113.

[0049] In one embodiment, the thermoelectric component 120 includes a first thermoelectric component and a second thermoelectric component, and the first thermoelectric component and the second thermoelectric component are respectively arranged on two sides of the heat collecting component 130. The heat dissipating component 110 includes a first heat dissipating component and a second heat dissipating component, and the first heat dissipating component is arranged on a side of the first thermoelectric component away from the heat collecting component 130, and the second heat dissipating component is arranged on a side of the second thermoelectric component away from the heat collecting component 130. The fins 112 are respectively arranged on sides of the first heat dissipating component and the second heat dissipating component away from each other.

[0050] In the embodiment, a side of the first heat dissipating component away from the heat collecting component 130 is equidistantly provided with a plurality of first fins, and a side of the second heat dissipating component away from the heat collecting component 130 is equidistantly provided with a plurality of second fins. The thermoelectric component 120 is divided into the first thermoelectric component and the second thermoelectric component, and the first thermoelectric component and the second thermoelectric component each have two thermoelectric devices. Each of the thermoelectric devices is connected in series, and each of the thermoelectric devices has a size of 25mmx25mmx3.5mm. The first thermoelectric component and the second thermoelectric component are respectively attached to two sides of the heat collecting component 130. The two sides of the heat collecting component 130 are respectively provided with grooves for assembling and mounting the first thermoelectric component and the second thermoelectric component. The two sides of one heat collecting component 130 can simultaneously heat the hot side ends of the first thermoelectric component and the second thermoelectric component, more efficiently absorb the heat energy of the heat collecting component 130, and reduce the waste of heat energy. The heat dissipating component 110 includes the first heat dissipating component and the second heat dissipating component, and the first heat dissipating component and the second heat dissipating component are respectively installed on the cold side ends of the first thermoelectric component and the second thermoelectric component. The first heat dissipating component dissipates heat and cools the cold side end of the first thermoelectric component, and the second heat dissipating component dissipates heat and cools the cold side end of the second thermoelectric component. The use of the heat energy in the heat collecting component 130 is improved, which is conducive to improving the power generation capacity of the thermoelectric component 120.

[0051] In one embodiment, the first fins and the second fins are the same in size, shape, number, and distribution position.

[0052] In the embodiment, the first fins in the first heat dissipating component and the second fins in the second heat dissipating component are the same in state, and the structure of the first heat dissipating component is the same as that of the second heat dissipating component, so that the first heat dissipating component and the second heat dissipating component can be replaced, which is conducive to improving the convenience of installing the heat dissipating component 110 and facilitating the replacement of the first heat dissipating component and the second heat dissipating component.

[0053] In one embodiment, the number of the first fins is not equal to the number of the second fins, and the distribution positions of the first fins in the first heat dissipating component and the second fins in the second heat dissipating component are not symmetrical.

[0054] In the embodiment, the first heat dissipation assembly and the second heat dissipation assembly are respectively installed on the side surfaces of the first thermoelectric component assembly and the second thermoelectric component assembly. In actual cases, the heat dissipation environment and the heat dissipation condition of the first heat dissipation assembly and the second heat dissipation assembly in different positions are different. The first heat dissipation assembly faces the heat source, and the temperature around the first heat dissipation assembly is higher than the temperature around the second heat dissipation assembly. The first heat dissipation assembly needs more first fins to improve the heat dissipation capacity of the first heat dissipation assembly, accelerate the heat dissipation of the first thermoelectric component assembly, make the temperature on both sides of the first thermoelectric component assembly close to the temperature on both sides of the second thermoelectric component assembly, make the electric energy generated by the first thermoelectric component assembly close to the electric energy generated by the second thermoelectric component assembly, and facilitate the selection of the first thermoelectric component assembly and the second thermoelectric component assembly.

[0055] In one embodiment, the ratio of the total area of the first fins to the total area of the second fins is 1:3.

[0056] In the embodiment, in the actual detection of the temperature of the steam pipeline, the installation position of some thermocouple modules 100 is relatively complex, the second heat dissipation assembly faces the wall or other equipment, and the size of the second fins is the same as that of the first fins. Therefore, the area of the second fins is increased, the contact area between the second fins and the air is increased, the heat dissipation of the first heat dissipation assembly and the second heat dissipation assembly is consistent with the cooling effect of the first thermoelectric component assembly and the second thermoelectric component assembly, and the thermocouple module 100 can be adapted to different installation environments.

[0057] In one embodiment, the gap distance of the first fins is alternately distributed in width and narrowness, and the gap distance of the second fins is alternately distributed in width and narrowness.

[0058] In the embodiment, the gap between adjacent first fins or adjacent second fins is not equal in width, and is alternately distributed in wide gap and narrow gap. The air between the fins 112 with wide gap distance has a larger flow space, can better carry away the heat energy of the fins 112 on both sides of the gap, and the air temperature here is lower. The air flow space between the fins 112 with narrow gap distance is small, which is not conducive to air flow, so the air here absorbs more heat energy and has a higher temperature. When the two air streams with different temperatures meet, wind is formed above the fins 112, which further drives the air flow inside the fins 112 and improves the heat dissipation capacity.

[0059] In one embodiment, the number ratio of the heat pipes to the single thermoelectric component 120 is 1:1-6:1.

[0060] In the embodiment, the number ratio of the heat pipes to the single thermoelectric component 120 is 1:1. Four heat pipes are installed in one heat collecting assembly 130, and the four heat pipes correspond to the four thermoelectric components respectively, so that the thermoelectric components can fully absorb the heat energy transmitted by the heat pipes and improve the utilization rate of energy.

[0061] In one embodiment, the thickness of the heat collecting component 130 is 1-20 mm.

[0062] In this embodiment, the thickness of the heat collecting component 130 is 3 mm. The heat collecting component 130 is used to transfer heat energy. The thicker the heat collecting component 130 is, the larger the contact area between the heat collecting component 130 and the air is, so that more heat energy is exchanged between the heat collecting component 130 and the air, which is easy to cause the temperature of the heat collecting component 130 to drop, resulting in waste of heat energy, which is not conducive to the heat collecting component 130 to absorb heat energy. It has been tested that the thickness of 3 mm of the heat collecting component 130 is the optimal value.

[0063] The material of the heat collecting component 130 includes at least one of aluminum, copper, aluminum alloy and copper alloy.

[0064] In one embodiment, the material of the heat collecting component 130 is aluminum.

[0065] In this embodiment, the thermal conductivity of aluminum is 237-241 W / mK at room temperature. Aluminum has good heat conduction and heat dissipation capacity, and is low in cost. Therefore, using aluminum as the material of the heat collecting component 130 can quickly absorb heat energy in the heat pipe and quickly transfer the heat energy to the thermoelectric component 120, which is conducive to improving the conversion speed between heat energy and electric energy, and can control the cost.

[0066] In one embodiment, the material of the heat collecting component 130 is copper.

[0067] In this embodiment, the thermal conductivity of copper is 401 W / mK at room temperature. Compared with most metals, copper has higher heat conduction effect. Therefore, the heat collecting component 130 made of copper can absorb heat energy in the heat pipe faster than the heat collecting component 130 made of other materials.

[0068] In one embodiment, the material of the heat collecting component 130 is aluminum alloy.

[0069] In this embodiment, aluminum alloy and aluminum have good heat conduction and heat dissipation capacity, which is conducive to improving the heat collecting component 130 to absorb and transfer heat energy.

[0070] In one embodiment, the material of the heat collecting component 130 is copper alloy.

[0071] In this embodiment, copper alloy and copper have good heat conduction and heat dissipation capacity, which is conducive to improving the heat collecting component 130 to absorb and transfer heat energy.

[0072] The fin 112 is provided in at least one of the following structures:

[0073] The thickness of the fin 112 is 0.5-2 mm.

[0074] The height of the fins 112 is 20-100 mm.

[0075] The gap between adjacent fins 112 is 0.5-5 mm.

[0076] In an embodiment, the thickness of the fins 112 is 0.5-2 mm.

[0077] In this embodiment, the thickness of the fins 112 is preferably 1 mm. The fins 112 are used to dissipate heat from the heat dissipation assembly 110, and the thicker the fins 112, the greater the contact area of the fins 112 with air, the faster the heat dissipation speed, and the better the heat dissipation effect. However, the thicker the fins 112, the higher the cost of the fins 112, which is not conducive to cost control.

[0078] In an embodiment, the height of the fins 112 is 20-100 mm.

[0079] In this embodiment, the height of the fins 112 is preferably 55 mm. The higher the fins 112, the greater the contact area of the fins 112 with air, the faster the heat dissipation speed, and the better the heat dissipation effect. However, the higher the fins 112, the larger the volume of the fins 112, and the higher the cost of the fins 112.

[0080] In an embodiment, the gap between the fins 112 is 0.5-5 mm.

[0081] In this embodiment, the gap between the fins 112 is preferably 2 mm. The gap between the fins 112 is used for air flow, and the gap between the fins 112 affects the density of the fins 112 on the heat dissipation assembly 110. Too large or too small a density of the fins 112 affects the heat dissipation effect of the heat dissipation assembly 110.

[0082] The material of the fins 112 includes at least one of aluminum, copper, aluminum alloy, and copper alloy.

[0083] In an embodiment, the material of the fins 112 is aluminum.

[0084] In this embodiment, using aluminum as the material of the fins 112 can improve the heat dissipation capacity of the heat dissipation assembly 110 and accelerate the cooling effect of the cold side of the thermoelectric component 120 by the heat dissipation assembly 110.

[0085] In an embodiment, the material of the fins 112 is copper.

[0086] In this embodiment, using copper as the material of the fins 112 can improve the heat dissipation capacity of the heat dissipation assembly 110 and accelerate the cooling effect of the cold side of the thermoelectric component 120 by the heat dissipation assembly 110.

[0087] In an embodiment, the material of the fins 112 is aluminum alloy.

[0088] In the embodiment, the aluminum alloy as the material of the fins 112 can improve the heat dissipation capacity of the heat dissipation assembly 110 and accelerate the cooling effect of the cold surface end of the heat dissipation assembly 110 on the thermoelectric component 120.

[0089] In one embodiment, the material of the fins 112 is a copper alloy.

[0090] In the embodiment, the copper alloy as the material of the fins 112 can improve the heat dissipation capacity of the heat dissipation assembly 110 and accelerate the cooling effect of the cold surface end of the heat dissipation assembly 110 on the thermoelectric component 120.

[0091] In one embodiment, the power management module 200 includes a processing unit 210 and an energy storage unit 220.

[0092] The processing unit 210 is electrically connected with the first thermoelectric component and the second thermoelectric component, and the processing unit 210 is configured to perform voltage boosting, voltage reducing and voltage stabilizing on the voltage generated by the first thermoelectric component and the second thermoelectric component.

[0093] The energy storage unit 220 is electrically connected with the processing unit 210, and the energy storage unit 220 is configured to store electric energy and deliver the electric energy to the temperature detection module 300, the control module 400 and the wireless transmission module 500.

[0094] In the embodiment, the energy storage unit 220 includes a super capacitor or a lithium battery. The energy storage unit 220 is a lithium battery, and the capacity of the lithium battery is 900mA. The processing unit 210 includes a voltage boosting and stabilizing circuit and an energy storage management circuit. The voltage boosting and stabilizing circuit is electrically connected with the output end of the thermoelectric device. The energy storage management circuit is configured to control the charging and discharging of the lithium battery. The voltage boosting and stabilizing circuit performs voltage boosting and stabilizing on the electric energy generated by the thermoelectric device to obtain a 4.2V direct current output voltage. The output end of the processing unit 210 is electrically connected with the input end of the energy storage unit 220. The processing unit 210 includes a Tp4056 chip and an MP2161 chip. The Tp4056 chip is configured to manage the charging of the lithium battery. The MP2161 chip is configured to convert the voltage of the lithium battery to 3.3V to provide stable electric parameters for the temperature detection module 300, the control module 400 and the wireless transmission module 500.

[0095] In one embodiment, the temperature detection module 300 includes a thermal resistance and a data processing chip. The data processing chip is configured to calculate the temperature value according to the resistance value of the thermal resistance.

[0096] In the embodiment, the temperature detection module 300 includes a PT100 temperature measurement resistance and an adaptive chip MAX31865. The adaptive chip MAX31865 is configured to perform temperature acquisition and signal conversion and transmit the signal to the control module 400 for processing.

[0097] In one embodiment, the control module 400 comprises stm32l151 single chip. The control module 400 uses low power consumption mode, always maintains the collection of temperature data and data transmission.

[0098] In one embodiment, the wireless transmission module uses Air700E4G module to upload the temperature data to the cloud platform of the terminal 600 in real time, and develops a real-time monitoring page for the terminal 600 such as computer or mobile phone based on the cloud platform. The monitoring data includes multi-channel temperature and voltage data of the thermoelectric battery before voltage boosting.

[0099] The working principle and use process of the present application are as follows: the double sides of the first thermoelectric component and the second thermoelectric component are coated with heat-conducting silicone grease, the hot end faces of the first thermoelectric component and the second thermoelectric component are respectively placed in the grooves on the two sides of the heat collecting component 130, and the cold end faces of the first thermoelectric component and the second thermoelectric component are respectively placed in the grooves of the first heat dissipating component and the second heat dissipating component. The output ends of the first thermoelectric component and the second thermoelectric component are connected in series. The first thermoelectric component and the second thermoelectric component are assembled and fixed by the fastening component 140 to form the thermoelectric battery module 100. The thermoelectric battery module 100 is installed on the surface of the waste heat pipeline, and the heat pipe in the thermoelectric battery module 100 is embedded in the heat insulation bracket of the steam pipeline in the petrochemical industry. The waste heat at the heat insulation bracket is used to heat the heat collecting component 130, so that the temperature difference between the cold face end and the hot face end of the first thermoelectric component and the second thermoelectric component is generated. The Seebeck effect of the thermoelectric semiconductor material generates a direct current potential difference between the positive and negative electrodes of the thermoelectric component 120. The potential difference flows through the power management module 200, and the boost circuit in the power management module 200 is used to charge the lithium battery. The lithium battery supplies power to the temperature detection module 300, the control module 400 and the wireless transmission module 500. After the control module 400 obtains the collected data of the temperature detection module 300, the data is uploaded to the terminal 600 through the wireless transmission module 500.

[0100] The technical features of the above embodiments can be combined in any way. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present application.

[0101] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A passive wireless temperature sensor, characterized by The thermoelectric battery module, the power management module, the temperature detection module, the control module and the wireless transmission module are included. The output end of the thermoelectric battery module is electrically connected with the input end of the power management module, the output end of the power management module is electrically connected with the temperature detection module, the control module and the wireless transmission module respectively, and the control module is electrically connected with the temperature detection module and the wireless transmission module. The thermoelectric battery module is arranged on an adiabatic bracket and used for generating electric energy under the action of temperature difference and delivering the electric energy to the power management module. The power management module is used for delivering the electric energy to the temperature detection module, the control module and the wireless transmission module respectively. The temperature detection module is used for collecting environmental temperature and obtaining temperature information. The control module is used for acquiring the temperature information collected by the temperature detection module and sending the temperature information to the outside through the wireless transmission module.

2. A passive wireless temperature sensor according to claim 1, wherein, The thermoelectric battery module includes a heat dissipation component, a thermoelectric component and a heat collection component, the thermoelectric component is electrically connected with the power management module, the heat collection component and the heat dissipation component are arranged on the two sides of the thermoelectric component respectively, fins are arranged on the side of the heat dissipation component away from the thermoelectric component, the heat collection component is provided with a heat pipe, and the heat pipe is used for being embedded in a steam pipeline adiabatic bracket.

3. A passive wireless temperature sensor according to claim 2, wherein, The thermoelectric component includes a first thermoelectric component and a second thermoelectric component, the first thermoelectric component and the second thermoelectric component are arranged on the two sides of the heat collection component respectively, the heat dissipation component includes a first heat dissipation component and a second heat dissipation component, the first heat dissipation component is arranged on the side of the first thermoelectric component away from the heat collection component, the second heat dissipation component is arranged on the side of the second thermoelectric component away from the heat collection component, and the fins are arranged on the sides of the first heat dissipation component and the second heat dissipation component away from each other.

4. A passive wireless temperature sensor according to claim 2, wherein, The number ratio of the heat pipe to a single thermoelectric component is 1:1-6:

1.

5. A passive wireless temperature sensor according to claim 2, wherein, The thickness of the heat collection component is 1-20 mm.

6. A passive wireless temperature sensor according to claim 2, wherein, The fins are arranged in at least one of the following structures: The thickness of the fins is 0.5-2 mm. The height of the fins is 20-100 mm. The gap of the fins is 0.5-5 mm.

7. A passive wireless temperature sensor according to claim 3, wherein, The power management module includes a processing unit and an energy storage unit. The processing unit is electrically connected with the first thermoelectric component and the second thermoelectric component, and is used for boosting and stabilizing the voltage generated by the first thermoelectric component and the second thermoelectric component. The energy storage unit is electrically connected with the processing unit, and is used for storing electric energy and delivering the electric energy to the temperature detection module, the control module and the wireless transmission module.

8. A passive wireless temperature sensor according to claim 2, wherein, The shape of the fins is needle-shaped.

9. A passive wireless temperature sensor according to claim 2, wherein, The bottom end of the fin is provided with a rotating shaft, which is rotationally connected with the heat dissipation assembly, two adjusting holes are formed in the fin, and two first adjusting rods and a second adjusting rod are respectively arranged in the two adjusting holes.

10. A passive wireless temperature sensor according to claim 9, wherein, The fixing assembly comprises a limiting screw arranged in the rotating ring, a threaded hole is formed in the rotating ring, the limiting screw is threadedly arranged in the threaded hole, and one end of the limiting screw penetrating through the threaded hole abuts against the side surface of the rotating rod.

Images