CN215573426U - Antistatic thermometer circuit and barbecue thermometer - Google Patents
Antistatic thermometer circuit and barbecue thermometer Download PDFInfo
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- CN215573426U CN215573426U CN202121129290.1U CN202121129290U CN215573426U CN 215573426 U CN215573426 U CN 215573426U CN 202121129290 U CN202121129290 U CN 202121129290U CN 215573426 U CN215573426 U CN 215573426U
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Abstract
The utility model discloses an antistatic thermometer circuit and a barbecue thermometer, wherein the antistatic thermometer circuit comprises a probe, an NTC circuit, an electrostatic absorption circuit and an MCU (microprogrammed control Unit); the probe is connected with the NTC circuit, the output end of the NTC circuit is connected with the detection end of the MCU, and the static electricity absorption circuit is connected with the NTC circuit; a probe for inserting into the interior of the food to measure the temperature of the food; the NTC circuit is used for detecting the temperature of the probe and feeding back a temperature electric signal to the MCU; the static absorption circuit is used for absorbing the static signal generated in the NTC circuit; and the MCU is used for analyzing and processing the temperature electric signal fed back by the NTC circuit and outputting a temperature value corresponding to the temperature electric signal. The technical scheme of the utility model improves the antistatic capacity of the barbecue thermometer.
Description
Technical Field
The utility model relates to the technical field of temperature measurement, in particular to an antistatic thermometer circuit and a barbecue thermometer.
Background
With the increasing development of economy, people have increasingly promoted the beautiful life. Barbecuing is popular with many people. When barbecue activities such as outdoor barbecue, have the barbecue thermometer of measurement temperature to the electric oven, through the supporting more than one probe of a barbecue thermometer to the realization is to the temperature measurement of a plurality of barbecue positions.
Because the probe of the barbecue thermometer is made of stainless steel, when the probe is impacted by static electricity, the static electricity is easily coupled into the NTC lead wire inside the barbecue thermometer, the binding wire of the control chip is burnt, the NTC can not be detected by the control chip, and meanwhile, the barbecue thermometer can not normally display the temperature.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide an antistatic thermometer circuit and a barbecue thermometer, and aims to improve the antistatic capability of the barbecue thermometer.
In order to achieve the above object, the present invention provides an antistatic thermometer circuit, which comprises a probe, an NTC circuit, an electrostatic absorption circuit and an MCU;
the probe is connected with the NTC circuit, the output end of the NTC circuit is connected with the detection end of the MCU, and the static absorption circuit is connected with the NTC circuit;
the probe is inserted into the food to measure the temperature of the food;
the NTC circuit is used for detecting the temperature of the probe and feeding back a temperature electric signal to the MCU;
the static electricity absorption circuit is used for absorbing the static electricity signal generated in the NTC circuit;
and the MCU is used for analyzing and processing the temperature electric signal fed back by the NTC circuit and outputting a temperature value corresponding to the temperature electric signal.
Optionally, the static electricity absorbing circuit includes a first static electricity discharge diode and a second static electricity discharge diode, both of which are used for absorbing the static electricity signal generated in the NTC circuit.
Optionally, a first terminal of the first esd diode is grounded, a second terminal of the first esd diode is connected to the first terminal of the NTC circuit, a first terminal of the second esd diode is connected to the second terminal of the NTC circuit, and a second terminal of the second esd diode is grounded.
Optionally, the probe is made of stainless steel.
Optionally, the antistatic thermometer circuit further comprises a display circuit, and an input end of the display circuit is electrically connected with an output end of the MCU;
and the display circuit is used for displaying the food temperature value measured by the probe under the control of the MCU.
Optionally, the antistatic thermometer circuit further comprises a backlight indicator light, and an input end of the backlight indicator light is connected with an input end of the display circuit;
the backlight indicator lamp is used for providing a backlight light source for the display circuit.
Optionally, the anti-static thermometer circuit further comprises a first resistor, a second resistor, a third resistor and a first capacitor;
the MCU is provided with a low-temperature area resistance input pin, a high-temperature area resistance input pin, a first temperature sensor input pin and a second temperature sensor input pin, wherein the first end of the first resistor is connected with the first end of the NTC circuit and is connected to the first temperature sensor input pin of the MCU, the second end of the first resistor, the second end of the NTC circuit, the second end of the second resistor and the first end of the third resistor are connected with each other and are connected to the second temperature sensor input pin of the MCU, the first end of the second resistor and the low-temperature area resistance input pin of the MCU, the second end of the third resistor is connected with the first end of the first capacitor and is connected to the high-temperature area resistance input pin of the MCU, and the second end of the first capacitor is grounded.
Optionally, the antistatic thermometer circuit further includes a plurality of switches, and the plurality of switches are respectively connected to a control pin of the MCU.
Optionally, the antistatic thermometer circuit further comprises a metal ion battery for supplying power to the MCU.
The present embodiment also proposes a barbeque thermometer comprising an antistatic thermometer circuit as described above, the antistatic thermometer circuit comprising a probe, an NTC circuit, an electrostatic absorption circuit and an MCU;
the probe is connected with the NTC circuit, the output end of the NTC circuit is connected with the detection end of the MCU, and the static absorption circuit is connected with the NTC circuit;
the probe is inserted into the food to measure the temperature of the food;
the NTC circuit is used for detecting the temperature of the probe and feeding back a temperature electric signal to the MCU;
the static electricity absorption circuit is used for absorbing the static electricity signal generated in the NTC circuit;
and the MCU is used for analyzing and processing the temperature electric signal fed back by the NTC circuit and outputting a temperature value corresponding to the temperature electric signal.
According to the technical scheme, the antistatic thermometer circuit comprises a probe, an NTC circuit, an electrostatic absorption circuit and an MCU; the probe is connected with the NTC circuit, the output of NTC circuit is connected with MCU's sense terminal, because the probe is easy with static coupling to inside NTC circuit when receiving electrostatic impact, with MCU's binding wire blowout, this scheme is just through connecting the electrostatic absorption circuit in NTC circuit, with the static of absorbing coupling on the NTC circuit, solved because the electrostatic coupling leads to the problem that MCU binding wire blowout, the antistatic effect of barbecue thermometer has been promoted, thereby promote the reliability of barbecue thermometer.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic block diagram of an embodiment of an anti-static thermometer circuit according to the present invention;
fig. 2 is a schematic circuit diagram of an embodiment of the anti-static thermometer circuit of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | Probe needle | D1 | First |
| 20 | NTC circuit | D2 | Second |
| 30 | Electrostatic absorption circuit | R1 | A |
| 40 | MCU | R2 | |
| 50 | Display circuit | R3 | Third resistance |
| C1 | First capacitor |
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides an antistatic thermometer circuit.
In an embodiment of the present invention, as shown in fig. 1 and fig. 2, the anti-static thermometer circuit includes a probe 10, an NTC circuit 20, an electrostatic absorption circuit 30, and an MCU 40;
the probe 10 is connected with the NTC circuit 20, the output end of the NTC circuit 20 is connected with the detection end of the MCU40, and the electrostatic absorption circuit 30 is connected with the NTC circuit 20;
the probe 10 for inserting into the interior of a food to measure the temperature of the food;
the NTC circuit 20 is used for detecting the temperature of the probe 10 and feeding back a temperature electric signal to the MCU 40;
the static electricity absorption circuit 30 is used for absorbing the static electricity signal generated in the NTC circuit 20;
the MCU40 is configured to analyze and process the temperature electrical signal fed back by the NTC circuit 20, and output a temperature value corresponding to the temperature electrical signal.
In this embodiment, the MCU40 may be, but is not limited to, a single chip with a model of CSU8RP1186B, and is selected according to practical application. In the scheme, the MCU40 has a low temperature region resistance input pin RR, a high temperature region resistance input pin CX, a first temperature sensor input pin RT, and a second temperature sensor input pin RH; after the NTC circuit 20 detects the temperature of the probe 10, a temperature electrical signal is fed back to the MCU40, that is, the first temperature sensor input pin RT and the second temperature sensor input pin RH of the MCU40 are used to measure the internal temperature of the food, the NTC circuit 20 converts the temperature analog signal into a temperature electrical signal and feeds the temperature electrical signal back to the MCU40, and the MCU40 analyzes and processes the fed-back temperature electrical signal to output a temperature value corresponding to the temperature electrical signal, that is, a temperature value inside the food.
In this embodiment, the MCU40 may be, but not limited to, a metal-ion battery, the second temperature sensor input pin may also be a schmitt trigger input pin, the schmitt trigger functions as two threshold voltages and forms a hysteresis region, which can prevent noise in the hysteresis range from interfering with the normal operation of the circuit. The Schmitt trigger also has two stable states, but is different from the common trigger in that the Schmitt trigger adopts a potential triggering mode, and the state of the Schmitt trigger is maintained by the potential of an input signal; for input signals with two different changing directions of negative decreasing and positive increasing, the Schmitt trigger has different threshold voltages.
In the above embodiment, the antistatic thermometer circuit further includes a display circuit 50, and an input end of the display circuit 50 is electrically connected to an output end of the MCU 40; the display circuit 50 is used for displaying the food temperature value measured by the probe 10 under the control of the MCU40, and the antistatic thermometer circuit can also use a backlight indicator lamp to provide a backlight light source for the display circuit 50.
The technical scheme of the utility model includes that the antistatic thermometer circuit comprises a probe 10, an NTC circuit 20, an electrostatic absorption circuit 30 and an MCU 40; probe 10 is connected with NTC circuit 20, the output of NTC circuit 20 is connected with MCU 40's sense terminal, because probe 10 is stainless steel material, easily couple static to inside NTC circuit 20 when receiving static impact, burn out the binding wire of MCU40, this scheme is just through connecting static absorption circuit 30 in NTC circuit 20, with the static of absorbing the coupling on NTC circuit 20, the problem of MCU40 binding wire burn out because the static coupling has been solved, the antistatic effect of barbecue thermometer has been promoted, thereby promote the reliability of barbecue thermometer.
In an embodiment, referring to fig. 2, the static electricity absorbing circuit 30 includes a first static electricity discharge diode D1 and a second static electricity discharge diode D2, both of which are used for absorbing the static electricity signal generated in the NTC circuit 20, a first terminal of the first static electricity discharge diode D1 is connected to ground, a second terminal of the first static electricity discharge diode D1 is connected to the first terminal of the NTC circuit 20, a first terminal of the second static electricity discharge diode D2 is connected to the second terminal of the NTC circuit 20, and a second terminal of the second static electricity discharge diode D2 is connected to ground. The electrostatic absorption circuit 30 of the present embodiment includes a plurality of electrostatic discharge diodes to absorb the coupled static electricity on the NTC circuit 20, so as to prevent the static electricity on the NTC circuit 20 from being transmitted to the MCU40, which may cause the first temperature sensor input pin RT and the second temperature sensor input pin RH of the MCU40 to be blown.
Further, the antistatic thermometer circuit further comprises a first resistor R1, a second resistor R2, a third resistor R3 and a first capacitor C1; the first end of the first resistor R1 is connected to the first end of the NTC circuit 20 and to the first temperature sensor input pin of the MCU40, the second end of the first resistor R1, the second end of the NTC circuit 20, the second end of the second resistor R2 and the first end of the third resistor R3 are connected to each other and to the second temperature sensor input pin of the MCU40, the first end of the second resistor R2 is connected to the low temperature region resistor input pin of the MCU40, the second end of the third resistor R3 is connected to the first end of the first capacitor C1 and to the high temperature region resistor input pin of the MCU40, and the second end of the first capacitor C1 is grounded. According to the scheme, the NTC circuit 20 is adjusted through the first resistor R1, the second resistor R2 is used as a voltage dividing resistor of the NTC circuit 20 in a low-temperature region, and the third resistor R3 is used as a voltage dividing resistor of the NTC circuit 20 in a high-temperature region, so that the internal temperature value of food measured by the antistatic thermometer circuit is more reliable and accurate.
In the above embodiments, the antistatic thermometer circuit further includes a plurality of switches, the plurality of switches are respectively connected to a control pin of the MCU40, and the plurality of switches may include a fahrenheit/celsius temperature switch, a temperature calibration switch, a backlight switch, a reset switch, an on/off switch, and the like.
To achieve the above object, the present embodiment also proposes a barbeque thermometer comprising an antistatic thermometer circuit as described above, the antistatic thermometer circuit comprising the probe 10, the NTC circuit 20, the static electricity absorbing circuit 30, and the MCU 40;
the probe 10 is connected with the NTC circuit 20, the output end of the NTC circuit 20 is connected with the detection end of the MCU40, and the electrostatic absorption circuit 30 is connected with the NTC circuit 20;
the probe 10 for inserting into the interior of a food to measure the temperature of the food;
the NTC circuit 20 is used for detecting the temperature of the probe 10 and feeding back a temperature electric signal to the MCU 40;
the static electricity absorption circuit 30 is used for absorbing the static electricity signal generated in the NTC circuit 20;
the MCU40 is configured to analyze and process the temperature electrical signal fed back by the NTC circuit 20, and output a temperature value corresponding to the temperature electrical signal.
The specific structure of the barbecue thermometer refers to the above embodiments, and the barbecue thermometer adopts all technical schemes of all embodiments of the antistatic thermometer circuit, so that the barbecue thermometer at least has all beneficial effects brought by the technical schemes of the above embodiments, and further description is omitted.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An antistatic thermometer circuit is characterized in that the antistatic thermometer circuit comprises a probe, an NTC circuit, an electrostatic absorption circuit and an MCU;
the probe is connected with the NTC circuit, the output end of the NTC circuit is connected with the detection end of the MCU, and the static absorption circuit is connected with the NTC circuit;
the probe is inserted into the food to measure the temperature of the food;
the NTC circuit is used for detecting the temperature of the probe and feeding back a temperature electric signal to the MCU;
the static electricity absorption circuit is used for absorbing the static electricity signal generated in the NTC circuit;
and the MCU is used for analyzing and processing the temperature electric signal fed back by the NTC circuit and outputting a temperature value corresponding to the temperature electric signal.
2. The antistatic thermometer circuit of claim 1 wherein the static absorption circuit comprises a first static discharge diode and a second static discharge diode, both for absorbing the static signal generated in the NTC circuit.
3. The anti-static thermometer circuit of claim 2 wherein a first terminal of said first static discharge diode is connected to ground, a second terminal of said first static discharge diode is connected to a first terminal of said NTC circuit, a first terminal of said second static discharge diode is connected to a second terminal of said NTC circuit, and a second terminal of said second static discharge diode is connected to ground.
4. The anti-static thermometer circuit of claim 1 wherein said probe is stainless steel.
5. The antistatic thermometer circuit of claim 1 further comprising a display circuit, an input of the display circuit being electrically connected to an output of the MCU;
and the display circuit is used for displaying the food temperature value measured by the probe under the control of the MCU.
6. The anti-static thermometer circuit as recited in claim 5 further comprising a backlight indicator light, an input of said backlight indicator light being connected to an input of said display circuit;
the backlight indicator lamp is used for providing a backlight light source for the display circuit.
7. The anti-static thermometer circuit of claim 1 wherein said anti-static thermometer circuit further comprises a first resistor, a second resistor, a third resistor, and a first capacitor;
the MCU is provided with a low-temperature area resistance input pin, a high-temperature area resistance input pin, a first temperature sensor input pin and a second temperature sensor input pin, wherein the first end of the first resistor is connected with the first end of the NTC circuit and is connected to the first temperature sensor input pin of the MCU, the second end of the first resistor, the second end of the NTC circuit, the second end of the second resistor and the first end of the third resistor are connected with each other and are connected to the second temperature sensor input pin of the MCU, the first end of the second resistor and the low-temperature area resistance input pin of the MCU, the second end of the third resistor is connected with the first end of the first capacitor and is connected to the high-temperature area resistance input pin of the MCU, and the second end of the first capacitor is grounded.
8. The anti-static thermometer circuit as claimed in any one of claims 1 to 7 further comprising a plurality of switches, each of the plurality of switches being connected to a control pin of the MCU.
9. An antistatic thermometer circuit as claimed in any one of claims 1 to 7 wherein said antistatic thermometer circuit further comprises a metal ion battery for powering said MCU.
10. A barbeque thermometer, characterised in that it comprises an antistatic thermometer circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121129290.1U CN215573426U (en) | 2021-05-24 | 2021-05-24 | Antistatic thermometer circuit and barbecue thermometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121129290.1U CN215573426U (en) | 2021-05-24 | 2021-05-24 | Antistatic thermometer circuit and barbecue thermometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215573426U true CN215573426U (en) | 2022-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121129290.1U Active CN215573426U (en) | 2021-05-24 | 2021-05-24 | Antistatic thermometer circuit and barbecue thermometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215573426U (en) |
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2021
- 2021-05-24 CN CN202121129290.1U patent/CN215573426U/en active Active
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