Bluetooth temperature probe and temperature measurement apparatus

Abstract

A Bluetooth temperature probe (45), comprising a handle assembly, a circuit board (20), a probe housing (30), a battery (27), an antenna (10), and a probe head (35). The Bluetooth temperature probe (45) is provided with an on-site thermocouple apparatus (25), and the on-site thermocouple apparatus (25) is formed by spot welding a Constantan elastic piece and a copper-clad piece of the circuit board (20). The Constantan elastic piece thereof abuts against the probe housing (30), and a metal ball formed by the spot welding is a temperature sensing head of the on-site thermocouple apparatus (25) for measuring the temperature. A temperature measurement apparatus comprising the Bluetooth temperature probe (45) is further provided. According to the temperature measurement apparatus, a front end of the probe head (35) is configured to have a flat shape having a sharp edge, such that the Bluetooth temperature probe (45) can be easily inserted into food. By providing the on-site thermocouple apparatus (25) in the probe housing (30), not only is faster and more accurate temperature measurement achieved, but also additional on-site thermocouple apparatuses (25) can be provided on the basis of the requirements of temperature measurement points, thereby further ensuring the accuracy of temperature measurements.

Description

Bluetooth temperature probe and temperature measuring device TECHNICAL FIELD

[0001] The present application relates to the technical field of temperature measuring instruments, in particular to a Bluetooth temperature probe and a temperature measuring device. BACKGROUND

[0002] With the progress of science and technology and the improvement of living standards, people have higher requirements for the taste and nutrition of food materials, and expect to obtain more accurate temperature values by using a metal probe in the process of controlling the cooking of whole meat food materials. In the prior art, a temperature probe generally installs a circuit board in a shell and relies on temperature sensing devices on the circuit board, such as NTC thermistors or digital NTC chips, to sense temperature changes. In the temperature sensing process, since the devices installed on the circuit board cannot directly contact the inner wall of the shell, the transmission of heat changes needs to be conducted through insulating or air media to conduct heat, plus the error of the temperature sensing device itself, which will cause the lag of the measured temperature change and a large error value in the actual measurement process, and cannot guarantee the accuracy of the temperature measurement value, which easily causes the difficulty in grasping the raw and cooked degree of food. Whether the raw and cooked degree of food is too raw or too cooked will directly affect the taste or appetite of users, and will also bring corresponding health and safety hazards.

[0003] There is also a common problem in using the temperature probe, that is, when the meat food material is thick, since the single sharp head structure design of the front end of most temperature probes in the prior art, the thick needle body will encounter a large resistance when the temperature probe is inserted into the food material, which will cause the difficulty of inserting the temperature probe into the food material, which greatly affects the use of users. TECHNICAL PROBLEM

[0004] To solve the problems of the temperature probe that the measured temperature value is not accurate enough to cause poor food taste and the difficulty of inserting the temperature probe into the food material, the present application provides a Bluetooth temperature probe and a temperature measuring device.

[0005] The Bluetooth temperature probe provided by the present application comprises a handle assembly, a circuit board, a probe shell, a battery, an antenna and a probe head, and is characterized in that: the Bluetooth temperature probe is provided with a field setting type thermocouple device, the field setting type thermocouple device is formed by spot welding a constantan spring sheet and a copper sheet of the circuit board, the constantan spring sheet abuts against the probe shell, and a metal ball formed by spot welding is a temperature sensing head of the field setting type thermocouple device and is used for measuring temperature.

[0006] As a further improvement of the present application, the number of field setting type thermocouple devices is at least two, and the field setting type thermocouple devices are arranged according to the length of the circuit board.

[0007] As a further improvement of the present application, the forward part of the probe head has a flat sharp blade, which is made of ceramic or stainless steel.

[0008] As a further improvement of the present application, the flat sharp blade of the probe head is gradually narrowed, which is in a decreasing structure.

[0009] As a further improvement of the present application, the handle assembly comprises an insulating handle, a screw head and a sealing ring, the screw head is arranged at the tail of the insulating handle, and the sealing ring is arranged between the insulating handle and the screw head.

[0010] As a further improvement of the present application, the antenna is arranged inside the insulating handle and the probe shell, one end of the antenna is electrically connected with the circuit board, and the other end of the antenna is connected with the screw head, so as to realize the transmission and reception of signals.

[0011] As a further improvement of the present application, the circuit board is further provided with a Bluetooth master chip and a digital thermocouple processing chip.

[0012] As a further improvement of the present application, the battery is arranged between the circuit board and the probe head, and is electrically connected with the circuit board.

[0013] The temperature measuring device provided by the present application comprises the Bluetooth temperature probe.

[0014] As a further improvement of the present application, the temperature measuring device further comprises a signal transmission charging box, the signal transmission charging box is provided with a power supply assembly, a control assembly and a wireless transmission assembly, after receiving the information sent by the Bluetooth temperature probe, the wireless transmission assembly transmits the information to the control assembly for processing, and the information processed by the control assembly is sent to a mobile terminal or a cloud through the wireless transmission assembly.

[0015] The beneficial effects of the present application are: by setting the front end of the probe head to a flat sharp blade shape, the Bluetooth temperature probe can easily insert into the food, greatly convenient for the user to use. By setting the on-site setting type thermocouple device in the probe shell, the temperature sensing head is more closely close to the temperature probe metal shell. When the high temperature of the roast meat environment makes the roast meat warm up, the time lag of the temperature sensing head transmitted to the display device is greatly reduced. When the temperature of the temperature sensing head changes, the on-site setting type thermocouple device and the copper clad sheet of the circuit board form a pair of thermocouple measurement endpoints, and an electromotive force is generated therebetween, providing a small delay and stable and accurate raw temperature change value for chip analysis. Compared with the temperature measurement method of the temperature sensing device used in the prior art, the temperature measurement method using the on-site setting type thermocouple device not only measures the temperature more quickly and accurately, but also can increase the setting of the on-site setting type thermocouple device at multiple temperature measurement points according to the needs, further guaranteeing the accuracy of the measured temperature, and better guaranteeing the high quality taste of the roast meat. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a side view of a Bluetooth temperature probe according to the present application;

[0017] Fig. 2 is a front view of a Bluetooth temperature probe according to the present application;

[0018] Fig. 3 is a front view of a blade head structure of a Bluetooth temperature probe according to the present application;

[0019] Fig. 4 is a side view of a blade head structure of a Bluetooth temperature probe according to the present application;

[0020] Fig. 5 is a schematic diagram of a Bluetooth temperature probe and a signal transmission charging box according to the present application;

[0021] Fig. 6 is a partial circuit diagram of a Bluetooth temperature probe according to the present application;

[0022] Fig. 7 is a partial circuit diagram of a power supply assembly, a control assembly and a wireless transmission assembly of a signal transmission charging box according to the present application.

[0023] The correspondence between the reference signs and the component names is as follows:

[0024] screw head - 5; sealing ring - 7; antenna - 10; insulating handle - 15;

[0025] Bluetooth master chip - 17; circuit board - 20; digital thermocouple processing chip - 22;

[0026] on-site setting type thermocouple device - 25; battery - 27; probe shell - 30;

[0027] probe head - 35; signal transmission charging box - 40, Bluetooth temperature probe - 45. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings in the embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0030] As shown in FIG. 1 and FIG. 2, the Bluetooth temperature probe disclosed in the embodiments of the present application includes a screw head 5, a sealing ring 7, an antenna 10, an insulating handle 15, a Bluetooth main chip 17, a circuit board 20, a digital thermocouple processing chip 22, a field setting type thermocouple device 25, a battery 27, a probe shell 30 and a probe head 35. The probe head 35 has a flat sharp blade at the front part, the blade gradually narrows from back to front, showing a decreasing structure, is made of ceramic or stainless steel material, and meets the relevant food safety level. When the probe head 35 is made of stainless steel, it can be used as a charging negative electrode. The probe shell 30 is made of metal material, and is made of stainless steel material in the embodiment, which is a conductor for heat transmission of food materials, and can also be used as a negative electrode for charging. The probe shell 30 is hollow inside and is provided with the field setting type thermocouple device 25, the battery 27, the Bluetooth main chip 17, the digital thermocouple processing chip 22 and the circuit board 20. The Bluetooth main chip 17 and the digital thermocouple processing chip 22 are arranged on the circuit board 20.

[0031] The field setting type thermocouple device 25 is formed by spot welding the copper clad sheet of the circuit board 20 with the constantan spring, and the constantan spring abuts against the probe shell 30. The spot welding forms a metal ball, which is the temperature sensing head of the field setting type thermocouple device 25, for measuring temperature. When the temperature sensing head temperature changes, the measuring electrode pair is formed between the copper clad sheet of the circuit board 20 and the constantan spring of the field setting type thermocouple device, which are at different potentials respectively, and generates corresponding thermoelectric potential, and the change of electromotive force is formed with the temperature rising and falling, which provides the temperature analysis of the digital thermocouple processing chip 22 with small delay and stable and accurate original temperature change value. The field setting type thermocouple device 25 is not only used for measuring temperature, but also serves as an elastic fixing member to fix the circuit board 20 in the probe shell 30, and as the negative electrode of the battery 27. In addition, according to the size of the food to be heated and the length of the corresponding circuit board, the field setting type thermocouple device 25 can be set at different positions to further ensure the accuracy of the measured temperature.

[0032] The insulating handle 15 is made of insulating materials such as ceramics or high-temperature plastics. The screw head 5 is arranged at the tail of the insulating handle 15, and is made of metal materials, and in this embodiment, is made of stainless steel, which is used for fixing and also serves as the positive electrode for charging. The sealing ring 7 is arranged between the insulating handle 15 and the screw head 5. The antenna 10 is arranged inside the insulating handle 15, and in this embodiment, is a spring. One end of the antenna 10 is electrically connected to the circuit board 20, and the other end is connected to the screw head 5. During installation, the antenna 10 is compressed and forms an inductive environment with the screw head 5, which resonates with the wireless frequency, to realize signal transmission and reception. Since the screw head 5 serves as the positive electrode for charging the battery in the circuit of the circuit board 20, the antenna 10 in contact with the screw head 5 transmits electric energy to the positive electrode on the circuit board 20 to charge the battery 27. The antenna 10 and the positive electrode of the battery 27 are signal isolated by a resistor or inductor, which does not cause attenuation of the wireless signal, and ensures the stability and reliability of the wireless signal in the transmission process.

[0033] As shown in FIG. 3 and FIG. 4, another embodiment of the present application is disclosed, in which other components are the same as the above-mentioned embodiment, the probe head 35 is made of ceramic or stainless steel material, the forward part has a flat sharp blade, the blade is wider than the front and rear ends of the probe head 35, the Bluetooth temperature probe can be easily inserted into the food when the meat is tight, avoiding the Bluetooth temperature probe encountering greater resistance when inserted into the food, so that the use of the Bluetooth temperature probe is difficult, greatly facilitating the use of the user. Another is a sharp flat head gradually widened probe head, as shown in FIG. 1 and FIG. 2, which can be used when the meat is relatively loose, providing users with another choice.

[0034] As shown in FIG. 5, a temperature measuring device disclosed by the present application comprises the Bluetooth temperature probe 45 provided by the above-mentioned embodiment and the signal transmission charging box 40, the power supply assembly charging circuit and the storage space provided in the signal transmission charging box 40 can store and charge the Bluetooth temperature probe 45, the control assembly and the wireless transmission assembly provided therein are used to receive and amplify the wireless signals emitted by the Bluetooth temperature probe 45 and send them, so that the mobile terminal or the cloud receives reliable wireless signals.

[0035] As shown in FIG. 6, the charging process of the Bluetooth temperature probe 45 is as follows: when the Bluetooth temperature probe 45 is returned to the signal transmission charging box 40, the screw head 5 of the Bluetooth temperature probe 45 contacts the output positive metal piece provided in the signal transmission charging box 40, the stable voltage provided by the power supply assembly circuit built-in the signal transmission charging box 40 is connected to the screw head 5, the direct current voltage passes through the antenna AN1, passes through L3-L2-L1 inductance and then passes through L4 magnetic bead inductance to VBAS point, so that the MOSFET Q1 is reversely cut off to close the Bluetooth chip power supply and stop the work of the Bluetooth chip, at the same time, the built-in battery E1 of the Bluetooth temperature probe is charged by the constant voltage current limiting through the D1 diode and the current limiting resistor R1, when the Bluetooth temperature probe 45 is charging, the wireless signal is in the closed state, and when it is not charging, the wireless signal is opened. The charging will not affect the transmission of the wireless signal.

[0036] As shown in FIG. 6, the working process of the Bluetooth temperature probe 45 is as follows: when the Bluetooth temperature probe 45 is taken out of the storage space of the signal transmission charging box 40, the MOSFET Q1 is turned on due to the loss of direct current voltage at the VBAS point, the built-in battery E1 is conducted from the source end to the drain end through the MOSFET Q1, BAT1+ is equal to the positive pole of the connected battery to supply power to the Bluetooth chip, at this time the Bluetooth chip starts to work, and the digital thermocouple conversion chip U2 is powered by the IO port GPIO08 of the Bluetooth chip through the resistor R3, when the Bluetooth temperature probe 45 contacts the food, the thermocouple chip U2 starts to collect the voltage change of the on-site setting type thermocouple device 25 and converts it into a digital temperature signal readable by the MCU, the data is read by the IO port GPIO09 of the Bluetooth chip U1, and the data is calculated and converted by U1 in the form of a data packet through the REP point, and the signal is transmitted to the outside through the inductors L1-L2-L3-antenna AN1.

[0037] As shown in FIG. 7, the charging process of the circuit assembly in the signal transmission charging box 40 is as follows: when the external power adapter is inserted into the TYPE-C port of the signal transmission charging box 40 through the USB line, the 5V power supply is connected to the VIN point through the TYPE-C socket, the built-in lithium battery J1 is charged through the charging management chip U1, and the current control and full power stop of the charging process are automatically controlled and completed by U1. During the charging process, the VIN voltage is stabilized by the LDO U2 to output VCC to supply power to the Bluetooth master chip, so that the Bluetooth master chip starts to work and reads the state of the STBY pin of the charging management chip to drive the indicator light LED1 to display the charging state or the full power state. During the whole process, the Bluetooth chip is closed internally to reduce the power consumption. When the Bluetooth temperature probe 45 is in the storage space of the signal transmission charging box 40 and the internal circuit of the signal transmission charging box 40 is in the charging state, the internal voltage stabilizing power supply output end VCC provides charging voltage to the Bluetooth temperature probe 45 through the metal contact. At the same time, due to the screw head 5 of the Bluetooth temperature probe 45, the metal contact of the signal transmission charging box 40 is short-circuited, the MOSFET Q1 is turned on, the Bluetooth chip IO port K1 reads low level, and the chip software automatically closes the wireless signal output of the Bluetooth chip.

[0038] The specific working process of the control assembly and the wireless transmission assembly in the signal transmission charging box 40 is as follows: when the Bluetooth temperature probe 45 is taken out from the storage space in the signal transmission charging box 40, the control assembly and the wireless transmission assembly in the signal transmission charging box 40 immediately start working, when receiving the wireless signal of the Bluetooth temperature probe 45, automatically pairing and reading the temperature data transmitted by the Bluetooth temperature probe 45, and amplifying and forwarding to the mobile phone terminal APP, so that the APP obtains accurate temperature data and displays in the APP, when the temperature value reaches the set value, triggers the APP alarm prompt, issues a prompt sound or vibration, reminds the user that the heated food has reached the set temperature.

[0039] The present application sets the front end of the probe head to a flat sharp blade shape, so that the Bluetooth temperature probe can easily insert into the food, greatly facilitating the use of the user. By setting the on-site setting type thermocouple device in the probe shell, the temperature sensing head is more closely attached to the temperature probe metal shell. When the meat is heated in a high temperature environment, the time lag of the temperature transmitted to the display device through the temperature sensing head is greatly reduced. When the temperature of the temperature sensing head changes, the on-site setting type thermocouple device and the copper clad sheet of the circuit board form a pair of thermocouple measurement endpoints, and an electromotive force is generated therebetween, providing a small delay and stable and accurate raw temperature change value for chip analysis. Compared with the temperature measurement method of the temperature sensing device used in the prior art, the temperature measurement method using the on-site setting type thermocouple device not only measures the temperature more quickly and accurately, but also can increase the setting of the on-site setting type thermocouple device at multiple temperature measurement points according to the needs, further guaranteeing the accuracy of the measured temperature and better guaranteeing the high quality taste of the roasted meat.

[0040] The above is a further detailed description of the present application in combination with a specific preferred embodiment, and cannot be considered as limiting the specific implementation of the present application to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, some simple deductions or replacements can be made without departing from the concept of the present application, and all of them should be considered as belonging to the present application.

Claims

1. A Bluetooth temperature probe comprising a handle assembly, a circuit board (20), a probe housing (30), a battery (27), an antenna (10) and a probe tip (35), characterized in that: The Bluetooth temperature probe (45) is provided with a field setting type thermocouple device (25) formed by spot welding of a constantan spring sheet and a copper sheet of the circuit board (20), the constantan spring sheet abuts against the probe shell (30), and the metal ball formed by spot welding is a temperature sensing head of the field setting type thermocouple device (25) for measuring temperature.

2. The Bluetooth temperature probe of claim 1, wherein: The field setting type thermocouple device (25) is provided in at least two groups according to different lengths of the circuit board (20).

3. The Bluetooth temperature probe of claim 1, wherein: The probe head (35) has a flat sharp blade at the front part, which is made of ceramic or stainless steel.

4. The Bluetooth temperature probe of claim 3, wherein: The flat sharp blade of the probe head (35) is gradually narrowed, and has a decreasing structure.

5. The Bluetooth temperature probe of claim 1, wherein, The handle assembly includes an insulating handle (15), a screw head (5) and a sealing ring (7), the screw head (5) is arranged at the tail of the insulating handle (15), and the sealing ring (7) is arranged between the insulating handle (15) and the screw head (5).

6. The Bluetooth temperature probe of claim 5, wherein: The antenna (10) is arranged inside the insulating handle (15), one end of the antenna (10) is electrically connected with the circuit board (20), and the other end is connected with the screw head (5) to realize signal transmission and reception.

7. The Bluetooth temperature probe of claim 1, wherein: The circuit board (20) is further provided with a Bluetooth master chip (17) and a digital thermocouple processing chip (22).

8. The Bluetooth temperature probe of claim 1, wherein: The battery (27) is arranged between the circuit board (20) and the probe head (35) and is electrically connected with the circuit board (20).

9. A temperature measuring device, characterized by: The temperature measuring device includes the Bluetooth temperature probe (45) of any one of claims 1-8 for temperature measurement.

10. The temperature measuring device of claim 9, wherein: The temperature measuring device further includes a signal transmission charging box (40), the signal transmission charging box (40) is provided with a power supply assembly, a control assembly and a wireless transmission assembly, after receiving the information sent by the Bluetooth temperature probe (45), the wireless transmission assembly transmits the information to the control assembly for processing, and the information processed by the control assembly is sent to a mobile terminal or a cloud through the wireless transmission assembly.

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