CN111998950A

CN111998950A - Forehead temperature gun

Info

Publication number: CN111998950A
Application number: CN202010652303.7A
Authority: CN
Inventors: 邓自然; 黄宇传; 黄亮雄; 王书方
Original assignee: Foshan City Shunde District Smc Multi Media Product Co ltd
Current assignee: Foshan City Shunde District Smc Multi Media Product Co ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2020-11-27

Abstract

The invention discloses a forehead temperature gun, which comprises a shell; a cavity is arranged in the shell; an induction channel for the measured object to pass through is arranged in the shell, and the induction channel is respectively communicated with the cavity and the external cavity; the cavity is internally provided with an induction module for acquiring the heat radiation of a measured object, a display module for displaying the temperature of the measured object, a power supply module and a control module for controlling the working state of the power supply module; the induction module is in communication connection with the display module; the induction module, the display module and the control module are all electrically connected with the power module. The invention has the advantages of simple structure, light weight, accurate temperature measurement and effective protection of internal electronic components.

Description

Forehead temperature gun

Technical Field

The invention relates to the technical field of temperature measurement, in particular to a forehead temperature gun.

Background

As is well known, the non-contact infrared thermometric instrument is mainly applied to temperature measurement of families, markets, public places, enterprises and public institutions, and can be used for preliminary screening of human body temperature and measurement of surface temperature of objects.

The temperature measuring principle of the temperature measuring instrument is that the radiation energy of infrared rays emitted by an object is converted into an electric signal, the magnitude of the infrared radiation energy corresponds to the temperature of the object, and the temperature of the object can be determined according to the magnitude of the converted electric signal.

The sensor mainly used by the thermometer is an infrared sensor, and the principle of the infrared sensor is the Seebeck effect. The seebeck effect (Seebeckeffect), also called the first thermoelectric effect, refers to a thermoelectric phenomenon in which a voltage difference between two substances is caused by a temperature difference between two different electrical conductors or semiconductors. The thermoelectric potential direction is generally specified as: electrons flow from negative to positive at the hot side. In a circuit composed of two metals a and B, if the temperatures of the two contact points are made different, a current, called a thermal current, will appear in the circuit. The corresponding electromotive force is called thermoelectric force, the direction of which depends on the direction of the temperature gradient. The cause of the seebeck effect can be simply explained as that under the temperature gradient, current carriers in a conductor move from a hot end to a cold end and are accumulated at the cold end, so that a potential difference is formed inside a material, a reverse charge flow is generated under the action of the potential difference, and when the charge flow of thermal motion and an internal electric field reach dynamic balance, stable temperature difference electromotive force is formed at two ends of a semiconductor. The semiconductor has large temperature difference electromotive force and can be used as a temperature difference generator.

When the infrared thermometer works, external infrared radiation irradiates an absorption area of the detector, the absorption area absorbs the infrared radiation and converts the infrared radiation into heat energy, and a temperature gradient is generated in a hot junction area and a cold junction area. The temperature gradient is converted into a voltage signal through the Seebeck effect of the thermocouple material and then is output, and the voltage signal is further converted into a temperature value through a calculating circuit.

However, through market research of the applicant and use of the existing infrared thermometer, the problems that the weight of the existing thermometer is increased due to the complex and intangible structure of the existing thermometer, the hand feeling of the handheld thermometer is influenced, and the failure rate is high and the temperature measurement error is large in the use process due to the fact that internal parts are not firmly designed are found. Moreover, the applicant also finds that the existing temperature measuring instrument is frequently used, and the using environment is complex, so that the temperature measuring instrument is easy to collide and fall, and other accidents happen, and therefore, how to make the temperature measuring instrument more durable and better protect the precise components inside the temperature measuring instrument is a problem which needs to be solved.

Therefore, there is a need to develop or improve a forehead temperature gun so as to solve the technical defects.

Disclosure of Invention

The invention aims to provide a forehead temperature gun to solve the problems that the existing thermometer is complex in structure, the weight of the thermometer is increased, the hand feeling of a handheld thermometer is influenced, and internal parts are not firmly designed, so that the failure rate is high and the temperature measurement error is large in the using process. Moreover, the applicant also finds that the existing temperature measuring instrument is frequently used, and the using environment is complex, so that the temperature measuring instrument is easy to collide and fall, and other accidents happen, and therefore, how to make the temperature measuring instrument more durable and better protect the precise components inside the temperature measuring instrument is a problem which needs to be solved.

In order to achieve the above object, the present invention provides a forehead temperature gun, which comprises a housing; a cavity is arranged in the shell; an induction channel for the measured object to pass through is arranged in the shell, and the induction channel is respectively communicated with the cavity and the external cavity; the cavity is internally provided with an induction module for acquiring the heat radiation of a measured object, a display module for displaying the temperature of the measured object, a power supply module and a control module for controlling the working state of the power supply module; the induction module is in communication connection with the display module; the induction module, the display module and the control module are all electrically connected with the power module.

Preferably, the housing includes a hand grip portion and a mounting portion; the induction channel is formed in the mounting part; one end of the mounting part, which is far away from the induction channel, is provided with a window for observing the temperature reading of the measured object on the display module; the hand holding part is located at one end of the mounting part close to the window.

Preferably, at least one fixing block for fixing the induction module is arranged on the inner wall of the shell; the fixed block is located in the induction channel, and the induction module is installed on the fixed block.

Preferably, the sensing module comprises a window seat and a sensing assembly; the outer contour of the window seat is of a columnar structure, and an installation channel penetrating through two end faces of the window seat is arranged in the window seat; the sensing assembly comprises a reflection tube, a sensor and a circuit board; the sensor comprises a sensing part and a pin part; the induction part is inserted into the reflection tube, and the pin part is electrically connected with the circuit board; the circuit board is covered on one end face, facing the window, of the mounting channel through bolts; the reflection tube and the sensor are both positioned in the installation channel.

Preferably, the sensing assembly further comprises a heat dissipation sleeve; the heat dissipation sleeve is sleeved on the pin.

Preferably, a plurality of projecting blocks extend on the inner wall of the mounting channel around the peripheral side thereof; a plurality of the protruding blocks are arranged at intervals and uniformly.

Preferably, the display module includes a display and a key group for setting a display mode of the display; the display corresponds to the window; the key group penetrates through the shell and protrudes out of the surface of the shell.

Preferably, the holding part is provided with a through hole; the control module comprises a switch block, an elastic piece and a switch contact piece for controlling the working state of the power supply module; the switch block protrudes out of the surface of the shell through the through hole; one end of the elastic piece is connected with the switch block, and the other end of the elastic piece is connected with the switch contact piece.

Preferably, a battery compartment for installing the power module is arranged at one end, far away from the installation part, in the holding part.

Preferably, the shell is made of ABS plastic; the ABS plastic comprises acrylonitrile, butadiene and styrene.

Compared with the prior art, the forehead temperature gun provided by the technical scheme has the beneficial effects that:

1. the induction channel is arranged, so that the heat radiation of the measured object is ensured to enter the cavity and be captured by the induction module; the temperature of the measured object can be rapidly obtained by arranging the sensing module, the display module and the control module; through being provided with power module to the mobility and the flexibility of forehead temperature rifle have been improved.

2. The invention has the advantages of simple structure, light weight, accurate temperature measurement and effective protection of internal electronic components.

Drawings

The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.

FIG. 1 is a schematic structural view of a forehead temperature gun in embodiments 1-2 of the present invention;

FIG. 2 is a schematic diagram illustrating an operation principle of an induction module of a forehead temperature gun in embodiments 1 to 2 of the present invention;

FIG. 3 is a circuit diagram of a forehead temperature gun in embodiments 1-2 of the present invention.

Description of reference numerals: 11-a hand grip; 12-a body; 13-a front cover; 14-rear cover; 2-induction channel; 3-a window; 4-window seat; 5-a reflection tube; 6-a sensor; 7-a circuit board; 8-a heat dissipation sleeve; 9-a protruding block; 10-a display; 14-a switch block; 15-an elastic member; 16-switch contact piece; 17-a battery; 18-a battery cover plate; 19-battery spring positive and negative combination; 191-positive battery spring; 192-battery spring negative; 20-a first button block; 21-a second button block; 22-third button block.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

The first embodiment is as follows:

a forehead temperature gun as shown in FIGS. 1-3, which comprises a housing; a cavity is arranged in the shell; an induction channel 2 for a measured object to pass through by heat radiation is arranged in the shell, and the induction channel 2 is respectively communicated with the cavity and an external cavity; the cavity is internally provided with an induction module for acquiring the heat radiation of a measured object, a display module for displaying the temperature of the measured object, a power supply module and a control module for controlling the working state of the power supply module; the induction module is in communication connection with the display module; the induction module, the display module and the control module are all electrically connected with the power module.

In the embodiment 1, the induction channel 2 is arranged, so that the heat radiation of the measured object is ensured to enter the cavity and be captured by the induction module; the temperature of the measured object can be rapidly obtained by arranging the sensing module, the display module and the control module; through being provided with power module to the mobility and the flexibility of forehead temperature rifle have been improved.

As shown in fig. 1, in order to improve the maneuverability and flexibility of the forehead thermometer, satisfy the ergonomics, and provide a good feeling and experience, the housing of this embodiment 1 includes a grip portion 11 and a mounting portion; the induction channel 2 is formed in the mounting part; a window 3 for observing the temperature reading of the measured object on the display module is arranged at one end of the mounting part, which is far away from the induction channel 2; the hand-held portion 11 is located on one end of the mounting portion near the window 3.

Wherein, the mounting part comprises a body 12 and a front cover 13 and a rear cover 14 which are respectively arranged at two ends of the body 12; the front cover 13 and the rear cover 14 are connected with the body 12 in a buckling manner; the window 3 is formed on the rear cover 14, and the front cover 13 is provided with clearance holes penetrating through two end faces of the front cover; the clearance hole is communicated with the induction channel 2.

In addition, in order to better fix the sensing block and reduce temperature distortion caused by damage to parts of the sensing module due to impact in the using process, at least one fixing block for fixing the sensing module is arranged on the inner wall of the shell in embodiment 1; the fixed block is located in the induction channel 2, and the induction module is arranged on the fixed block.

In order to better protect the sensing assembly and avoid damage to electronic components during use, the sensing module in this embodiment 1 includes a window seat 4 and the sensing assembly; the outer contour of the window seat 4 is a columnar structure, and an installation channel penetrating through two end faces of the window seat 4 is arranged in the window seat 4; the sensing assembly comprises a reflection tube 5, a sensor 6 and a circuit board 7; the sensor 6 comprises a sensing part and a pin part; the induction part is inserted in the reflection tube 5, and the pin part is electrically connected with the circuit board 7; the circuit board 7 is covered on one end face of the mounting channel facing the window 3 through a bolt; moreover, in order to ensure the heat dissipation performance of the inductor and prolong the service life of the inductor, the sensing assembly further comprises a heat dissipation sleeve 8; the heat dissipation sleeve 8 is sleeved on the pins.

The reflecting tube 5 is made of aluminum materials and vacuum aluminizing, so that the reflectivity is stable; the inductor is specifically a thermopile type inductor, and infrared rays generated by the surface temperature of a solid are transmitted into the inductor to be converted into heat energy, so that errors caused by contact are avoided, and meanwhile, the speed is greatly increased. Furthermore, the circuit board 7 comprises a zero drift preamplifier, thereby avoiding temperature and using time drift compensation.

In addition, in order to ensure that the heat radiation can be sufficiently captured by the inductor, the inner wall of the installation passage in this embodiment 1 is extended with a plurality of projecting blocks 9 around the peripheral side thereof; the plurality of convex blocks 9 are uniformly distributed at intervals; and a drainage channel is formed between the adjacent convex blocks 9.

In order to better read the temperature of the object to be protected and adjust the display mode, the display module in this embodiment 1 includes a display 10 and a key set for setting the display mode of the display 10; the display 10 corresponds to the window 3; the key group penetrates through the shell and protrudes out of the surface of the shell; the key group comprises a first button block 20, a second button block 21 and a third button block 22; the first button block 20 is used for switching between F and C; the second button block 21 is used for filtering or switching the object table mode; the third button block 22 is used for setting a temperature correction value.

In order to better control the forehead temperature gun and improve the user experience, the grip portion 11 in this embodiment 1 is provided with a through hole; the control module comprises a switch block 14, an elastic piece 15 and a switch contact piece 16 for controlling the working state of the power supply module; the switch block 14 protrudes out of the surface of the shell through the through hole; one end of the elastic piece 15 is connected with the switch block 14, and the other end is connected with the switch contact piece 16; keep away from in the portion of holding 11 the one end of installation department is equipped with and is used for the installation power module's battery compartment.

In addition, the power supply module is specifically operated by two detachable AAA batteries 17, so that no power supply and electromagnetic wave interference exist; the circuit board 7 further comprises a thermistor with the environment temperature of 1% arranged inside, and in addition, the RTD equipment with the precision of 0.02 ℃ is used for correction in the production process, so that the forehead temperature gun can realize high-precision measurement in 5 ten thousand hours.

In this embodiment, a notch is formed in one end of the hand holding portion 11, which is far away from the mounting portion, and the notch is communicated with the battery compartment and is used for the battery 17 to pass through; a battery 17 cover plate which can be turned over and covers the notch is arranged on the hand holding part 11; a battery spring positive and negative combination 19 electrically connected with the battery 17 is also arranged in the battery bin; wherein the battery spring positive and negative combination 19 comprises a battery spring positive pole 191 and a battery spring negative pole 192.

The material of the housing in this embodiment 1 is ABS plastic; the ABS plastic includes acrylonitrile, butadiene, and styrene, thereby increasing the toughness, stiffness, and rigidity of the housing, making the forehead gun more durable. Among them, acrylonitrile makes it resistant to chemical corrosion and heat and has a certain surface hardness, butadiene makes it highly elastic and tough, and styrene makes it have the processing and molding characteristics of thermoplastics and improves electrical properties.

Example two:

the second embodiment is further described in the above embodiments, it should be understood that the second embodiment includes all the technical features and is further specifically described as follows:

In the embodiment 2, the induction channel 2 is arranged, so that the heat radiation of the measured object enters the cavity and is accurately captured by the induction module, the heat radiation can be prevented from being interfered by external turbulence in the induction channel 2, and meanwhile, the loss in the transmission process can be offset after the heat radiation is gathered in the induction channel 2, so that the real temperature of the measured object can be more accurately reflected, and the accuracy of temperature measurement is improved; the temperature of the measured object can be rapidly obtained by arranging the sensing module, the display module and the control module; through being provided with power module to the mobility and the flexibility of forehead temperature rifle have been improved.

As shown in fig. 1, in order to improve the maneuverability and flexibility of the forehead thermometer, satisfy the ergonomics, and provide a good feeling and experience, the housing of this embodiment 2 includes a grip portion 11 and a mounting portion; the induction channel 2 is formed in the mounting part; a window 3 for observing the temperature reading of the measured object on the display module is arranged at one end of the mounting part, which is far away from the induction channel 2; the hand-held portion 11 is located on one end of the mounting portion near the window 3.

In addition, in order to better fix the sensing block and reduce temperature distortion caused by damage to parts of the sensing module due to impact in the using process, at least one fixing block for fixing the sensing module is arranged on the inner wall of the shell in the embodiment 2; the fixed block is located in the induction channel 2, and the induction module is arranged on the fixed block.

In order to better protect the sensing assembly and avoid damage to electronic components during use, the sensing module in this embodiment 2 includes a window seat 4 and the sensing assembly; the outer contour of the window seat 4 is a columnar structure, and an installation channel penetrating through two end faces of the window seat 4 is arranged in the window seat 4; the sensing assembly comprises a reflection tube 5, a sensor 6 and a circuit board 7; the sensor 6 comprises a sensing part and a pin part; the induction part is inserted in the reflection tube 5, and the pin part is electrically connected with the circuit board 7; the circuit board 7 is covered on one end face of the mounting channel facing the window 3 through a bolt; moreover, in order to ensure the heat dissipation performance of the inductor and prolong the service life of the inductor, the sensing assembly further comprises a heat dissipation sleeve 8; the heat dissipation sleeve 8 is sleeved on the pins.

In addition, in order to ensure that the heat radiation can be sufficiently captured by the inductor, the inner wall of the installation passage in this embodiment 2 is extended with a plurality of projecting blocks 9 around the peripheral side thereof; the plurality of convex blocks 9 are uniformly distributed at intervals; and a drainage channel is formed between the adjacent convex blocks 9.

In order to better read the temperature of the object to be protected and adjust the display mode, the display module in this embodiment 2 includes a display 10 and a key set for setting the display mode of the display 10; the display 10 corresponds to the window 3; the key group penetrates through the shell and protrudes out of the surface of the shell; the key group comprises a first button block 20, a second button block 21 and a third button block 22; the first button block 20 is used for switching between F and C; the second button block 21 is used for filtering or switching the object table mode; the third button block 22 is used for setting a temperature correction value.

In order to better control the forehead temperature gun and improve the user experience, the grip portion 11 in this embodiment 2 is provided with a through hole; the control module comprises a switch block 14, an elastic piece 15 and a switch contact piece 16 for controlling the working state of the power supply module; the switch block 14 protrudes out of the surface of the shell through the through hole; one end of the elastic piece 15 is connected with the switch block 14, and the other end is connected with the switch contact piece 16; keep away from in the portion of holding 11 the one end of installation department is equipped with and is used for the installation power module's battery compartment.

The material of the housing in this embodiment 2 is ABS plastic; the ABS plastic includes acrylonitrile, butadiene, and styrene, thereby increasing the toughness, stiffness, and rigidity of the housing, making the forehead gun more durable. Among them, acrylonitrile makes it resistant to chemical corrosion and heat and has a certain surface hardness, butadiene makes it highly elastic and tough, and styrene makes it have the processing and molding characteristics of thermoplastics and improves electrical properties.

In this embodiment 2, in order to improve the temperature measurement efficiency, the temperature measurement in the motion state of the object to be measured is satisfied, and the thermal radiation of the object to be measured is better captured; a capture device for accurately capturing the measured object is also arranged in the induction channel; the capture device comprises an input module, a path calculation module and an output module; an input module for setting a movement path by pressing an input button in a user setting mode in a state where the user looks at an object to be measured;

the path calculation module comprises an acceleration sensor, a gyroscope, a calculation processor and a temperature correction compensation module; the output module is used for outputting the movement path of the object to be measured calculated by the path calculation module, wherein the acceleration sensor is used for measuring the moving speed of the measured object; the gyroscope is used for measuring the relative positions of the sensing components in the shell in the space, namely the X axis, the Y axis and the Z axis in the space; the calculation processor is configured to calculate a movement path with respect to the object to be measured set in the input module using measurement values measured by the acceleration sensor and the gyroscope in a user execution mode in a state where the user aims the forehead gun at the object to be measured; the input module is used for calculating the room temperature, the distance of the forehead thermometer capturing the heat radiation of the measured object and the heat loss caused by the movement of the measured object in a compensation mode through a specific moving path set by a user by combining the temperature correction compensation module.

The temperature correction compensation module comprises a temperature floating unit, a judgment unit, a magnetic field drift measurement unit, a processing unit and a correction unit; the temperature floating unit is used for measuring a temperature change value; the judging unit is used for judging whether the temperature measurement is finished or not, and otherwise, the magnetic field drift measuring unit is informed; the magnetic field drift measuring unit is used for measuring the drift signal value of the main magnetic field; the processing unit is used for calculating a compensation current value according to the main magnetic field drift signal value; the correction unit is used for compensating the main magnetic field according to the compensation current value; the magnetic field drift measuring unit comprises an initial measuring unit and a drift measuring unit; the initial measurement unit is used for acquiring an initial main magnetic field drift signal value; the drift measuring unit is used for acquiring and comparing drift signal values of the main magnetic field; the processing unit comprises a main magnetic field drift amount calculating unit and a compensation current value calculating unit: the main magnetic field drift amount calculation unit calculates the main magnetic field drift amount according to the initial main magnetic field drift signal value and the comparison main magnetic field drift signal value; and the compensation current value calculating unit calculates a compensation current value according to the drift amount of the main magnetic field.

The above examples are to be construed as merely illustrative and not limitative of the remainder of the disclosure. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.

Claims

1. A forehead temperature gun, which comprises a shell; a cavity is arranged in the shell; the device is characterized in that an induction channel for the heat radiation of a measured object to pass through is arranged in the shell, and the induction channel is respectively communicated with the cavity and the external cavity; the cavity is internally provided with an induction module for acquiring the heat radiation of a measured object, a display module for displaying the temperature of the measured object, a power supply module and a control module for controlling the working state of the power supply module; the induction module is in communication connection with the display module; the induction module, the display module and the control module are all electrically connected with the power module.

2. The forehead thermometer of claim 1, wherein the housing includes a hand grip and a mounting portion; the induction channel is formed in the mounting part; one end of the mounting part, which is far away from the induction channel, is provided with a window for observing the reading of the temperature of the measured object on the display module; the hand holding part is located at one end of the mounting part close to the window.

3. The forehead temperature gun according to claim 2, wherein at least one fixing block for fixing the sensing module is provided on an inner wall of the housing; the fixed block is located in the induction channel, and the induction module is installed on the fixed block.

4. The forehead thermometer of claim 2, wherein the sensing module includes a window mount and a sensing assembly; the outer contour of the window seat is of a columnar structure, and an installation channel penetrating through two end faces of the window seat is arranged in the window seat; the sensing assembly comprises a reflection tube, a sensor and a circuit board; the sensor comprises a sensing part and a pin part; the induction part is inserted into the reflection tube, and the pin part is electrically connected with the circuit board; the circuit board is covered on one end face, facing the window, of the mounting channel through bolts; the reflection tube and the sensor are both positioned in the installation channel.

5. The forehead thermometer of claim 4, wherein the sensing assembly further comprises a heat sink sleeve; the heat dissipation sleeve is sleeved on the pin.

6. The forehead thermometer according to claim 4, wherein a plurality of projections extend from an inner wall of the mounting channel around a circumferential side thereof; a plurality of the protruding blocks are arranged at intervals and uniformly.

7. The forehead temperature gun according to claim 2, wherein the display module includes a display and a key set for setting a display mode of the display; the display corresponds to the window; the key group penetrates through the shell and protrudes out of the surface of the shell.

8. The forehead thermometer according to claim 2, wherein the grip portion is provided with a through hole; the control module comprises a switch block, an elastic piece and a switch contact piece for controlling the working state of the power supply module; the switch block protrudes out of the surface of the shell through the through hole; one end of the elastic piece is connected with the switch block, and the other end of the elastic piece is connected with the switch contact piece.

9. The forehead thermometer according to claim 2, wherein a battery compartment for mounting the power module is provided at an end of the grip portion away from the mounting portion.

10. The forehead thermometer according to claim 1, wherein the housing is made of ABS plastic; the ABS plastic comprises acrylonitrile, butadiene and styrene.