TWM458548U - Coil type magnetic attraction temperature sensor - Google Patents

Description

Coil type magnetic temperature sensor

This creation belongs to the field of temperature sensors, especially a coil type magnetic sensor that uses magnetic adsorption on the surface of an object to be measured to measure its surface temperature.

Press, generally use a variety of temperature sensors to detect the surface temperature of an object to be tested, usually such as: PT100Ω type temperature sensor, or K type temperature sensor, or JET type temperature sensor, or K The -JET type temperature sensing sheet is mounted on the front end of a hand-held shaft to form a touch type temperature sensor. In use, by extending the length of the hand-held shank, the temperature sensing sheet is in contact with the surface of the object to be tested to achieve the purpose of detecting the surface temperature, and the user is prevented from being burnt by the high temperature. The purpose of protection. However, in actual use, due to the touch type temperature sensor, it is necessary to continuously touch the surface of the object to be tested for a certain period of time, and the value of the surface temperature is sent back to the test instrument for display, and the surface temperature cannot be measured immediately. The surface of the object to be measured is not necessarily a flat surface, and there is a high risk of scalding when it is measured.

The Republic of China new patent No. M339675 "Magnetic Suction Thermostat" uses magnetic force to adsorb the surface of the object to be measured to measure its surface temperature. Please refer to Figures 1 and 2 for the sense of magnetic attraction. Schematic diagram of the structure of the heater and its state of use. As shown in the figure, the magnetic temperature sensor 1 includes a rod body 11, a magnet 12 and a temperature sensing sheet 13. One end of the rod body 11 is formed with a receiving groove 111. The magnet 12 is disposed in the receiving groove 111. The temperature sensing sheet 13 is disposed at one end of the rod body 11 relative to the magnet 12, and the feeling is Warm film 13 A signal connection line 131 is disposed, and the signal connection line 131 is disposed inside the rod body 11 and is pierced from the other end of the rod body 11 for information connection with a test instrument 2. It is adsorbed on the surface of the object to be tested 3 by the magnetic force of the magnet 12, so that the temperature sensing sheet 13 is sandwiched between the object to be tested 3 and the magnet 12 to accurately measure the surface temperature thereof, and the operation is simple. It can also avoid the occurrence of burns and accidents.

However, the temperature sensing sheet 13 used in the magnetic temperature sensor 1 can only test a high temperature of 240 ° C, and is affected by the high temperature, and the magnetic force of the magnet 12 is also degraded, so it will still be The error in the measurement, especially when the equivalent measuring surface is not flat, the temperature sensing sheet 13 cannot be completely flattened on the surface of the object to be tested 3, and is prone to error or even measurement. In view of this, the creator has made improvements to further develop coil-type magnetics that can measure higher temperatures and are easy to operate, and can be used on various uneven surfaces to obtain more accurate measurement results. The temperature sensor can solve the above problems.

One of the aims of the present invention is to provide a coil type magnetic sensor which utilizes one of the elastic temperature coils and is coupled to a magnetic outer cover having a receiving space and a support material, thereby utilizing the magnetic When the outer cover is adsorbed on a non-flat surface of the object to be tested, the temperature sensitive coil can still touch the surface with its elasticity, and measure the accurate temperature, which is not only convenient to operate, but also can be used for measurement. error.

The second objective of the present invention is to provide a coil type magnetic sensor which is coated on the outside of the magnetic cover by a protective cover, and the protective case is made of a heat insulating material, which can avoid the high temperature. The magnetic depletion of the magnetic enclosure can be used in higher temperature measurement environments.

In order to achieve the above object, the coil type magnetic temperature sensor of the present invention is electrically connected to a test instrument, and the surface temperature is sensed by magnetically adsorbing on the surface of an object to be tested, which includes: a magnetic cover, a tubular structure body made of a magnetic material, wherein at least one end of the magnetic outer cover is an open end; a support material is disposed correspondingly inside the magnetic outer cover, and is disposed along the axial direction of the support material a parallel perforation, one end face of the support material has a set step difference with respect to the open end portion, and an accommodation space is formed therebetween; and a temperature sensing coil is a continuous coiled elastic structure body, The two ends are respectively inserted into the two through holes to be electrically connected to the test instrument, so that the front end of the temperature sensing coil protrudes from the magnetic cover. The protruding length of the temperature sensing coil is greater than or equal to the depth of the set step, and the maximum temperature of the magnetic enclosure is 300 ° C, and the maximum temperature of the temperature sensing coil is 700 ° C. When the present invention is used, the open end of the magnetic cover is adsorbed on the surface of the object to be tested, so that the temperature sensitive coil is pressed and deformed by the surface, and a part thereof is retracted into the accommodating space. And the temperature sensing coil is kept in contact with the surface of the object to be tested for measurement. When the surface of the object to be tested is not a flat surface, the temperature sensing coil still has a certain protruding length and is to be tested. The surface of the object is in contact with each other, so that it can be accurately measured on various surfaces.

In one embodiment, the coil type magnetic sensor of the present invention further has a protective outer casing that is coated on the outside of the magnetic outer cover, and the protective outer casing is made of a heat insulating material, and the protection is The center of the outer casing is provided with a receiving groove corresponding to the magnetic outer cover for providing the magnetic outer casing therein, thereby protecting the magnetic outer cover from being affected by high temperature and detracting from the magnetic strength.

1‧‧‧Magnetic temperature sensor

11‧‧‧ rod body

111‧‧‧ accommodating slots

12‧‧‧ magnet

13‧‧‧ Temperature film

131‧‧‧Signal cable

2‧‧‧Testing equipment

3‧‧‧ objects to be tested

4‧‧‧Magnetic temperature sensor

41‧‧‧Magnetic cover

411‧‧‧Open end

42‧‧‧Support materials

421‧‧‧Perforation

422‧‧‧ accommodating space

43‧‧‧temperature coil

44‧‧‧Protection enclosure

441‧‧‧ accommodating slots

5‧‧‧Testing equipment

6‧‧‧ objects to be tested

D‧‧‧Set the step difference

Fig. 1 is a schematic view showing the structure of a conventional magnetic temperature sensor.

Fig. 2 is a schematic view showing a state in which a conventional magnetic temperature sensor is used.

Figure 3 is an exploded perspective view of a preferred embodiment of the present invention.

Figure 4 is a cross-sectional view of the preferred embodiment of the present invention assembled.

Figure 5 is a schematic view (I) of the state when the preferred embodiment of the present invention is used.

Figure 6 is a schematic view (2) of the state when the preferred embodiment of the present invention is used.

Figure 7 is another embodiment of the preferred embodiment of the present invention.

In order for your review board to have a clear understanding of the content of this creation, please refer to the following description only.

Please refer to Figures 3, 4, 5, and 6 for an exploded perspective view of the preferred embodiment of the present invention and a cross-sectional view thereof after assembly, and various state diagrams in use thereof. As shown in the figure, the coil type magnetic sensor 4 of the present invention is electrically connected to a test instrument 5, and the surface temperature is sensed by magnetically adsorbing on the surface of an object to be tested 6, the coil type magnetic The heat sensitive sensor 4 includes a magnetic outer cover 41, a support member 42 and a temperature sensing coil 43.

The magnetic outer cover 41 is made of a magnetic material to form a circular tubular structure, and one end of the magnetic outer cover 41 is an open end portion 411, and can be adsorbed to the object to be tested 6 by using the open end portion 411. surface. It should be noted that the shape of the open end portion 411 is annular in shape corresponding to the shape of the magnetic cover 41. However, the magnetic cover 41 is not limited thereto, and the shape of the open end portion 411 may also vary. Further, the magnetic housing 41 has a maximum withstand temperature of 300 °C.

The support member 42 is made of a heat-resistant material, and is formed in a shape corresponding to the inner shape of the magnetic cover 41 to form a cylindrical structure for being disposed in the magnetic cover 41. And a second parallel hole 421 is provided along the axial direction of the support member 42. Further, one end surface of the support member 42 has a set step D with respect to the open end portion 411, and An accommodation space 422 is formed.

The temperature sensing coil 43 is a flexible structure in which a conductive wire is wound to form a continuous winding. The two ends of the temperature sensing coil 43 are respectively inserted into the two through holes 421 to be electrically connected to the testing instrument 5. It should be noted that the protruding length of the temperature sensing coil 43 is greater than or equal to the depth of the set step D, so that the front end of the temperature sensing coil 43 protrudes from the magnetic outer cover 41, in particular, the open end portion 411. The outside. Moreover, the maximum temperature of the temperature sensing coil 43 is 700 ° C, which can be used to measure 700 ° C, but because the magnetic cover 41 can only withstand the high temperature of 300 ° C, it can only be used to measure 300 High temperature within °C.

As shown in FIGS. 5 and 6, when the coil type magnetic sensor 1 of the present invention is used in a generally flat plane, the open end portion 411 of the magnetic cover 41 is attracted to the object 6 to be tested. The surface of the temperature sensing coil 43 is pressed and deformed by the surface, and a part thereof is retracted into the accommodating space 422, and the temperature sensing coil 43 is kept in contact with the surface of the object 6 to be tested. Performing the measurement of the surface temperature; when the coil type magnetic temperature sensor 1 of the present invention is used on a non-flat surface, since the temperature sensing coil 43 has an appropriate protruding length, it is naturally compatible with the test The surface of the object 6 is in contact with each other to perform the measurement of the surface temperature. Therefore, the coil type magnetic temperature sensor 1 of the present invention can be applied to various surfaces, and ensures that the temperature sensing coil 43 is in contact with the surface of the object to be tested 6, so that the lack of contact or deflection can be avoided. The measurement error caused by it is even impossible to measure the dilemma of the uneven surface.

Please refer to FIG. 7, which is another embodiment of the preferred embodiment of the present invention. Please refer to Figure 3 together, as shown in the figure, in order to further increase the limit of the measured temperature, this The coiled magnetic sensor 1 is further provided with a protective casing 44. The protective casing 44 is made of a heat-insulating material, and the interior of the coiled casing 44 is provided with a receiving groove 441. The shape of the groove 441 is corresponding to the magnetic cover 41. Therefore, the protective cover 44 can be covered on the outside of the magnetic cover 41 to isolate the magnetic force caused by the high temperature exceeding 300 ° C to the magnetic cover 41. Theoretically, If the protective casing 44 can withstand a high temperature of 500 ° C or higher, the coiled magnetic thermometer 1 of the present invention can measure a high temperature of at least 500 ° C.

However, the above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, it is common knowledge in the technical field or equivalent or easy to be familiar with the technology. The changes and modifications made by the changer without departing from the spirit and scope of this creation shall be covered by the scope of this creation.

4‧‧‧Magnetic temperature sensor

41‧‧‧Magnetic cover

411‧‧‧Open end

42‧‧‧Support materials

421‧‧‧Perforation

43‧‧‧temperature coil

5‧‧‧Testing equipment

Claims (6)

A coil type magnetic induction sensor electrically connected to a test instrument for sensing the surface temperature thereof by magnetically adsorbing on a surface of an object to be tested, comprising: a magnetic cover made of a magnetic material a tubular structure, at least one end of the magnetic outer cover is an open end; a support material is disposed correspondingly inside the magnetic outer cover, and two parallel perforations are arranged along the axial direction of the support material, One end surface of the support material has a set step difference with respect to the open end portion, and an accommodation space is formed therebetween; and a temperature sensing coil is a continuous coiled elastic structure body, and the two ends thereof respectively penetrate the two Electrically connecting with the test instrument in the perforation, so that the front end of the temperature sensing coil protrudes from the magnetic outer cover; in use, the open end of the magnetic outer cover is adsorbed on the surface of the object to be tested, so that the feeling After the temperature coil is pressed, a part of the coil is inwardly retracted into the accommodating space, and is kept in contact with the surface of the object to be tested. The coil type magnetic induction heat sensor of claim 1, wherein the temperature sensing coil has a protruding length that is greater than or equal to a depth of the set step. The coil type magnetic induction heat sensor of claim 1, wherein the magnetic outer cover has a maximum temperature of 300 ° C The coil type magnetic induction heat sensor according to claim 1, wherein the temperature sensing coil has a maximum withstand temperature of 700 °C. The coil type magnetic induction heat sensor according to claim 1 further has a protective outer casing which is coated on the outside of the magnetic outer cover. The coil type magnetic induction heat sensor of claim 5, wherein the protective outer casing is It is made of a heat-insulating material, and the center of the protective casing is provided with a receiving groove corresponding to the magnetic outer cover.