CN216410423U - Contact type passive temperature measuring sensor - Google Patents

Abstract

The utility model discloses a contact type passive temperature measurement sensor, which comprises a locking ring for fixing a temperature measurement point of a cable joint and an integrated box fixed on the locking ring, wherein a PCB (printed circuit board) is arranged in the integrated box, a microcontroller module, a wireless transceiver module and a full-wave rectification voltage stabilizing circuit are arranged on the PCB, the outer side wall of the integrated box is provided with a sunken groove, a gain antenna electrically connected with the wireless transceiver module through an FPC (flexible printed circuit) is arranged in the sunken groove, a contact type temperature measurement component is arranged on the inner ring surface of the locking ring, the contact type temperature measurement component is electrically connected with the microcontroller module through a signal wire, an energy taking coil used for electromagnetic induction power supply is arranged in the locking ring, the energy taking coil is connected with the full-wave rectification voltage stabilizing circuit through a wire, and the full-wave rectification voltage stabilizing circuit is respectively and electrically connected with the contact type temperature measurement component, the microcontroller module and the wireless transceiver module. The utility model can realize maintenance-free, self-powered, high-precision, ultra-low power consumption, electrical isolation and real-time temperature monitoring, and is convenient to operate during fixation or detachment.

Description

Contact type passive temperature measuring sensor

Technical Field

The utility model relates to the technical field of electric power temperature measurement sensors, in particular to a contact type passive temperature measurement sensor.

Background

After current is introduced into various contacts and connection points of electrical equipment, such as switch contacts, cable joints, bus connection points, generator and transformer lead wire joints, motor junction box joints and the like, the temperature of the equipment changes, and the heat generation quantity of the equipment is in direct proportion to the square of the introduced current. The problems of equipment aging, surface oxidation, corrosion, fastening bolt loosening and the like can occur in long-term operation. In addition, many power equipment are overloaded for a long time, and high-temperature abnormity is easily caused. If the insulation is not processed in time, the insulation aging and even the burning of the insulation material can be caused by the overhigh temperature, and short circuit faults and great economic losses are caused. On the other hand, the electrical characteristics of the power equipment require the monitoring system to collect the temperature in a passive and wireless mode, and meanwhile, the monitoring system is required to monitor and record the temperature of key nodes (such as a mother board, a moving contact, a static contact, a plug and the like) of the equipment in real time and perform safety early warning on the basis of big data analysis. If the traditional active wireless temperature measurement product is large in size and short in service life, liquid leakage and explosion phenomena are prone to occurring at high temperature, and the adoption of the small-size power passive wireless temperature measurement sensor for achieving online temperature measurement and fault early warning is significant. Along with the continuous development of internet of things technology in recent years, the passive wireless temperature measurement sensor of electric power will be more small and exquisite sensitive, makes temperature acquisition more accurate. However, in the field of cable joint temperature measurement, the binding-type fixing method adopted by the existing passive wireless temperature measurement sensor has the problems of inconvenient operation and easy looseness. Because the passive wireless temperature measuring sensor is small in size, when the binding band is used for fixing or loosening the temperature measuring point of the cable joint, the operating space of two hands is limited, and the use is not flexible enough.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a contact type passive temperature measuring sensor which is convenient to operate and fix.

The technical scheme adopted by the utility model for realizing the technical effects is as follows:

a contact type passive temperature measuring sensor comprises a lock ring for fixing a temperature measuring point of a cable joint and an integrated box fixed on the lock ring, a PCB circuit board is arranged in the integrated box, a microcontroller module, a wireless transceiver module and a full-wave rectification voltage-stabilizing circuit are arranged on the PCB circuit board, the outer side wall of the integrated box is provided with a sinking groove, a gain antenna electrically connected with the wireless transceiver module through an FPC flexible circuit board is arranged in the sinking groove, the inner ring surface of the lock ring is provided with a contact temperature measuring component which is electrically connected with the microcontroller module through a signal wire, an energy taking coil used for electromagnetic induction power supply is arranged in the lock ring, the energy taking coil is connected with the full-wave rectification voltage stabilizing circuit through a lead, the full-wave rectification voltage stabilizing circuit is electrically connected with the contact type temperature measuring assembly, the microcontroller module and the wireless transceiver module respectively.

Preferably, in the above-mentioned contact passive temperature sensor, the locking ring includes a fixed portion fixed to the integrated box, and a movable portion hinged to one end of the fixed portion through a hinge shaft, the other end of the movable portion is provided with a sinking undercut cavity, the sinking undercut cavity is provided with a screw through hole therein, the fixed portion is provided with a screw blind hole opposite to the screw through hole on an end face corresponding to the sinking undercut cavity, and the movable end of the movable portion is connected to the fixed portion through a screw in a locking manner.

Preferably, in the above-mentioned contact passive temperature sensor, a cavity is provided inside the fixing portion, and the energy-extracting coil is provided in the cavity.

Preferably, in the above-mentioned contact passive temperature sensor, the contact temperature measuring component includes three thermistors distributed at equal intervals on the inner annular surface of the fixing portion.

Preferably, in the above-mentioned contact passive temperature sensor, three element device grooves are formed on an inner circumferential surface of the fixing portion at equal intervals, and the thermistor device is electrically connected to the microcontroller module in the element device grooves through a wire in sequence.

Preferably, in the above contact-type passive temperature sensor, the integrated box is made of an epoxy resin material.

The utility model has the beneficial effects that: the contact type passive temperature measuring sensor can realize the functions of maintenance free, self power supply, high precision, ultra-low power consumption, electrical isolation and real-time temperature monitoring, can flexibly fix or release the temperature measuring point of the cable joint through the lock ring, and is convenient to operate.

Drawings

FIG. 1 is a block diagram of the present invention.

Detailed Description

For a further understanding of the utility model, reference is made to the following description taken in conjunction with the accompanying drawings and specific examples, in which:

in the description of the present application, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.

Referring to fig. 1, as shown in the drawings, an embodiment of the present invention provides a contact type passive temperature measuring sensor including a locking ring 1 for fixing a temperature measuring point of a cable joint and an integration box 2 fixed to the locking ring 1. As shown in fig. 1, a PCB circuit board 3 is disposed in the integrated box 2, and a microcontroller module 31, a wireless transceiver module 32 and a full-wave rectification voltage regulator circuit are disposed on the PCB circuit board 3. In order to improve the quality of wireless signal transceiving, a sunken groove is formed in the outer side wall of the integrated box 2, a gain antenna 33 is arranged in the sunken groove, and the wireless transceiving module 32 is electrically connected with the gain antenna 33 through an FPC (flexible printed circuit) 34. In order to measure the temperature of the temperature measuring point of the cable joint, a contact temperature measuring component is arranged on the inner ring surface of the lock ring 1, the contact temperature measuring component is electrically connected with the microcontroller module 31 through a signal wire, and a temperature signal measured by the contact temperature measuring component is processed by the microcontroller module 31 and then is sent to the console through the wireless transceiver module 32. In order to realize electromagnetic induction power taking, as shown in fig. 1, an energy taking coil 5 for electromagnetic induction power supply is arranged in the lock ring 1, and the energy taking coil 5 is connected with a full-wave rectification voltage stabilizing circuit through a wire. The full-wave rectification voltage stabilizing circuit is electrically connected with the contact temperature measuring assembly, the microcontroller module 31 and the wireless transceiver module 32 respectively, and is used for rectifying and stabilizing the induced current and the voltage on the energy taking coil 5 and outputting stable working current and voltage to the contact temperature measuring assembly, the microcontroller module 31 and the wireless transceiver module 32. Specifically, the full-wave rectification voltage stabilizing circuit adopts a full-wave rectification voltage stabilizing circuit in the prior art, and a detailed circuit principle is not repeated here.

Further, in the preferred embodiment of the present invention, as shown in fig. 1, the locking ring 1 includes a fixed portion 11 fixed to the integrated box 2, and a movable portion 12 hinged to one end of the fixed portion 11 through a hinge shaft 13. Wherein, the other end of this movable part 12 is equipped with sinks and undercuts slot cavity 14, is equipped with the screw through-hole in the undercuts slot cavity 14, and fixed part 11 is equipped with the screw blind hole relative with the screw through-hole in the terminal surface that corresponds to sinks and undercuts slot cavity 14, and the expansion end of movable part 12 passes through screw 15 and fixed part 11 locking connection. The screw 15 can be easily received in the sunken hollow cavity 14, and then the screw 15 can be screwed into the screw through hole and the screw blind hole by a screwdriver, so that the movable part 12 and the fixed part 11 are fixed.

Further, in the preferred embodiment of the present invention, as shown in fig. 1, a cavity 111 is provided inside the fixing portion 11, and the energy-extracting coil 5 is provided in the cavity 111. Specifically, the contact temperature measuring assembly includes three thermistors 4 distributed on the inner annular surface of the fixing portion 11 at equal intervals, wherein three element device slots are formed in the inner annular surface of the fixing portion 11 at equal intervals, and the thermistors 4 are arranged in the element device slots and are electrically connected with the microcontroller module 31 through conducting wires in sequence. In order to prolong the service life, the integrated box 2 is made of epoxy resin materials and can resist heat and insulate.

In conclusion, the contact type passive temperature measurement sensor can realize the functions of maintenance free, self power supply, high precision, ultralow power consumption, electrical isolation and real-time temperature monitoring, can flexibly fix or release the temperature measurement point of the cable joint through the lock ring, and is convenient to operate.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the utility model, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined by the appended claims and their equivalents.

Claims (6)

1. A contact type passive temperature measurement sensor is characterized by comprising a lock ring (1) used for fixing a temperature measurement point of a cable joint and an integrated box (2) fixed on the lock ring (1), wherein a PCB (printed circuit board) (3) is arranged in the integrated box (2), a microcontroller module (31), a wireless transceiver module (32) and a full-wave rectification voltage stabilizing circuit are arranged on the PCB (3), a sunken groove is formed in the outer side wall of the integrated box (2), a gain antenna (33) electrically connected with the wireless transceiver module (32) through an FPC (flexible circuit board) (34) is arranged in the sunken groove, a contact type temperature measurement component is arranged on the inner ring surface of the lock ring (1), the contact type temperature measurement component is electrically connected with the microcontroller module (31) through a signal line, an energy taking coil (5) used for electromagnetic induction power supply is arranged in the lock ring (1), the energy taking coil (5) is connected with the full-wave rectification voltage stabilizing circuit through a wire, and the full-wave rectification voltage stabilizing circuit is electrically connected with the contact type temperature measuring assembly, the microcontroller module (31) and the wireless transceiver module (32) respectively.

2. The contact-type passive thermometric sensor according to claim 1, wherein the locking ring (1) comprises a fixed part (11) fixed to the integrated box (2), and a movable part (12) hinged to one end of the fixed part (11) through a hinge shaft (13), the other end of the movable part (12) is provided with a sunken undercut cavity (14), a screw through hole is provided in the sunken undercut cavity (14), the fixed part (11) is provided with a screw blind hole opposite to the screw through hole at an end face corresponding to the sunken undercut cavity (14), and the movable end of the movable part (12) is locked to the fixed part (11) through a screw (15).

3. The contact passive thermometric sensor according to claim 2, wherein the fixed part (11) has a cavity (111) inside, and the energy pick-up coil (5) is arranged inside the cavity (111).

4. The contact passive thermometric sensor according to claim 2, wherein the contact thermometric assembly comprises three thermistors (4) equally spaced on the inner circumferential surface of the fixed portion (11).

5. The contact-type passive temperature measuring sensor according to claim 4, wherein three element device grooves are formed in the inner annular surface of the fixing portion (11) at equal intervals, and the thermistor (4) is arranged in the element device grooves and is electrically connected with the microcontroller module (31) through a lead wire in sequence.

6. The contact passive thermometric sensor of claim 1, wherein the integrated box (2) is made of epoxy material.

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