CN110888092A

CN110888092A - Coupling device, detection circuit and method thereof and cooking appliance

Info

Publication number: CN110888092A
Application number: CN201811050813.6A
Authority: CN
Inventors: 曾彬
Original assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Current assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Priority date: 2018-09-10
Filing date: 2018-09-10
Publication date: 2020-03-17

Abstract

The invention discloses a coupling device, a detection circuit and a detection method thereof and a cooking appliance. Wherein, this detection circuitry includes: a coupling device, comprising: the contact structure comprises four contacts and at least two contact surfaces, wherein each contact surface is simultaneously contacted with one or two contacts; a detection device, comprising: the first end of the detection device is connected with the first contact and the second contact through at least one first contact surface, and the second end of the detection device is connected with the third contact and the fourth contact through at least one second contact surface; the controller is used for determining whether the coupling device is normally contacted or not based on voltage values corresponding to the first contact, the second contact and the third contact. The invention solves the technical problem that the temperature measurement data has larger error due to the fact that the contact of the coupling device is oxidized or corroded in the related technology.

Description

Coupling device, detection circuit and method thereof and cooking appliance

Technical Field

The invention relates to the field of household appliances, in particular to a coupling device, a detection circuit and method thereof and a cooking appliance.

Background

In the related art, a cooking appliance having a heating function, such as an electric pressure cooker, is provided with a temperature sensing element therein, and the temperature sensing element is electrically connected to a control board through a wire harness. When the part where the temperature sensing element is located is a detachable part, the temperature sensing element cannot be directly electrically connected with the control panel through a wire harness, a coupling device is needed for detachable connection, wherein a contact of the coupling device is generally made of metal, the surface of the coupling device is generally subjected to copper plating and other treatments, and under normal conditions, the contact impedance of the coupling device is very low and can be ignored. However, after a long time of use, due to environmental pollution and corrosion, the contact is easily oxidized or corroded, and a large contact impedance is generated between the contact and the contact, so that the temperature sensing element is greatly influenced, the temperature data measured by the temperature sensing element deviates from the real temperature, and unpredictable results are caused.

Aiming at the problem that the temperature measurement data error is large due to the fact that a contact of a coupling device in the related art is oxidized or corroded, an effective solution is not provided at present.

Disclosure of Invention

The embodiment of the invention provides a coupling device, a detection circuit and method thereof and a cooking utensil, which are used for at least solving the technical problem that the temperature measurement data error is larger due to the fact that a contact of the coupling device is oxidized or corroded in the related technology.

According to an aspect of an embodiment of the present invention, there is provided a detection circuit of a coupling device, including: a coupling device, comprising: four contacts and at least two contact surfaces, each contact surface simultaneously with one or two contact, the four contacts include: a first contact, a second contact, a third contact, and a fourth contact; a detection device, comprising: the first end of the detection device is connected with the first contact and the second contact through at least one first contact surface, and the second end of the detection device is connected with the third contact and the fourth contact through at least one second contact surface; a controller, comprising: the first sampling end is connected with the first contact and the direct-current power supply, the second sampling end is connected with the second contact, the third sampling end is connected with the third contact, and the fourth contact is grounded.

In the embodiment of the invention, the coupling device is improved, four contacts are arranged, each contact surface is simultaneously contacted with one or two contacts, each end of the detection device is connected with two contacts through at least one contact surface, three sampling ends of the controller are respectively connected with three contacts, by collecting the voltage values collected by the three sampling ends, whether the coupling device is normally contacted can be determined, thereby realizing the detection of whether the contact of the coupling device is oxidized or corroded, avoiding the abnormal work of the whole machine caused by the data deviation measured by the temperature measuring module due to the introduction of contact impedance, achieving the technical effects of improving the accuracy of temperature measuring data, improving the safety of cooking utensils and improving the user experience and good sensitivity, and further solve the technical problem that the temperature measurement data error is large due to the fact that the contact of the coupling device is oxidized or corroded in the related technology.

Further, the controller includes: and the first processing unit is used for judging whether the difference between the voltage values corresponding to the first contact and the second contact is less than or equal to a first preset value or not and whether the voltage value corresponding to the third contact is less than or equal to a second preset value or not so as to determine whether the coupling device is normally contacted or not. Through detecting the voltage value that the same end of connecting in detection device corresponds, realize detecting the purpose that whether there is impedance in every contact surface, whether further realize detecting coupling device's contact by oxidation or corruption, reached the degree of accuracy that promotes the temperature measurement data, promote cooking utensil's security, promote the effect that user experience felt and good sensitivity.

Further, the detection circuit further includes: and the alarm device is connected with the controller and used for generating corresponding alarm prompt information under the condition that the coupling device is determined to be in abnormal contact. The alarm device alarms under the condition that the coupling device is abnormal in contact, so that a user can clean or maintain the contact of the coupling device in time, the accuracy of temperature measurement data is further improved, the safety of a cooking appliance is improved, and the effects of user experience and good sensitivity are improved.

Further, the controller further comprises: and the second processing unit is used for obtaining the current sampling temperature based on the voltage value corresponding to the first contact under the condition that the coupling device is determined to be normally contacted. Through obtaining current sampling temperature after confirming that coupling device contact is normal, further reached the degree of accuracy that promotes the temperature measurement data, promote cooking utensil's security, promote the effect that user experience felt and good sensitivity.

Further, the detection circuit further includes: three protection modules, including: the protection device comprises a first protection module, a second protection module and a third protection module, wherein the first protection module is connected between a first contact and a first sampling end, the second protection module is connected between a second contact and a second sampling end, and the third protection module is connected between a third contact and a third sampling end. Through setting up protection module, the magnitude of voltage of avoiding the sample connection to gather is too high, influences the normal use of controller, moreover, carries out the filtering to the magnitude of voltage who gathers, avoids the clutter to the influence of testing result, has further reached the degree of accuracy that promotes the temperature measurement data, promotes cooking utensil's security, promotes the effect that user experience felt and good sensitivity.

Further, each protection module includes: the first resistor is connected between the contact and the sampling end; a first capacitor connected between the contact and ground; and the second capacitor is connected between the sampling end and the ground. The voltage value that avoids the sampling end to gather is too high through setting up first resistance, carries out the filtering through setting up first electric capacity and second electric capacity, avoids the influence of clutter to the testing result.

Further, the detection circuit further includes: and a second resistor connected between the first contact and the DC power supply. The second resistor is arranged to prevent the detection device from being damaged due to overlarge current, so that the normal use of the detection device is influenced.

Further, the detection device comprises at least: a temperature sensing element.

According to another aspect of the embodiments of the present invention, there is also provided a method for detecting a coupling device, where the coupling device includes: four contacts and at least two contact surfaces, each contact surface simultaneously with one or two contact, the four contacts include: the detection device comprises a first contact, a second contact, a third contact and a fourth contact, wherein a first end of the detection device is connected with the first contact and the second contact through at least one first contact surface, a second end of the detection device is connected with the third contact and the fourth contact through at least one second contact surface, a first sampling end of the controller is connected with the first contact and the direct-current power supply, a second sampling end of the controller is connected with the second contact, a third sampling end of the controller is connected with the third contact, and the fourth contact is grounded, wherein the detection method further comprises the following steps: acquiring voltage values acquired by the first sampling end, the second sampling end and the third sampling end to obtain voltage values corresponding to the first contact, the second contact and the third contact; and determining whether the coupling device is normally contacted or not based on the voltage values corresponding to the first contact, the second contact and the third contact.

Further, determining whether the coupling device is normally contacted based on the voltage values corresponding to the first contact, the second contact and the third contact comprises: acquiring the difference between voltage values corresponding to the first contact and the second contact to obtain a voltage difference value; judging whether the voltage difference value is smaller than or equal to a first preset value or not, and whether the voltage value corresponding to the third contact is smaller than or equal to a second preset value or not; and if the voltage difference value is greater than the first preset value or the voltage value corresponding to the third contact is greater than the second preset value, determining that the coupling device is in contact abnormity.

Further, if the voltage difference is less than or equal to the first preset value and the voltage value corresponding to the third contact is less than or equal to the second preset value, it is determined that the coupling device is in normal contact.

Further, under the condition that the contact abnormality of the coupling device is determined, corresponding alarm prompt information is generated.

Further, under the condition that the contact of the coupling device is determined to be normal, the current sampling temperature is obtained based on the voltage value corresponding to the first contact.

According to another aspect of the embodiments of the present invention, there is also provided a coupling device, including: four contacts; at least two contact surfaces, each contact surface being in contact with one or two contacts simultaneously.

According to another aspect of the embodiments of the present invention, there is also provided a cooking appliance including: the detection circuit of the coupling device.

Further, the cooking appliance is an electric pressure cooker.

According to another aspect of the embodiments of the present invention, there is also provided a storage medium including a stored program, wherein when the program runs, a device on which the storage medium is located is controlled to execute the above-mentioned detection method for the coupling device.

According to another aspect of the embodiments of the present invention, there is also provided a processor, configured to execute a program, where the program executes the method for detecting the coupling apparatus described above.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic diagram of a detection circuit of a coupling device according to an embodiment of the invention;

FIG. 2 is a schematic view of an alternative coupling device according to an embodiment of the present invention;

FIG. 3 is a circuit schematic of an alternative coupling device detection circuit according to an embodiment of the present invention;

FIG. 4 is a flow chart of a method of detecting a coupling device according to an embodiment of the invention; and

fig. 5 is a flow chart of an alternative coupling device detection method according to an embodiment of the invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, 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 the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example 1

According to an embodiment of the invention, an embodiment of a detection circuit of a coupling device is provided.

Fig. 1 is a schematic diagram of a detection circuit of a coupling device according to an embodiment of the present invention, as shown in fig. 1, the detection circuit including: coupling device 10, detection device 20 and controller 30, wherein coupling device 10 includes: four contacts 11 and at least two contact surfaces 12, each contact surface being in contact with one or two contacts simultaneously, the four contacts comprising: a first contact, a second contact, a third contact, and a fourth contact; the detection device 20 includes: a first end and a second end, the first end of the detection device 20 is connected with the first contact and the second contact through at least one first contact surface, and the second end of the detection device 20 is connected with the third contact and the fourth contact through at least one second contact surface; the controller 30 includes: the first sampling end is connected with the first contact and the direct-current power supply, the second sampling end is connected with the second contact, the third sampling end is connected with the third contact, and the fourth contact is grounded.

The controller 30 is configured to determine whether the coupling device is normally contacted based on the voltage values corresponding to the first contact, the second contact and the third contact.

In particular, in order to avoid the damage caused by the contact impedance, the coupling device may be modified, and in an embodiment of the present invention, the coupling device includes: four contacts and two contact surfaces are illustrated by way of example, and as shown in fig. 2, one side of the coupling device is designed as 4 contacts, namely a first contact S1-1, a second contact S1-2, a fourth contact S2-1 and a third contact S2-2, and the other side is designed as two integral contact surfaces, namely a and B, and during coupling the 2 contacts are simultaneously in contact with one contact surface, for example, the first contact S1-1 and the second contact S1-2 are in contact with the contact surface a, and the fourth contact S2-1 and the third contact S2-2 are in contact with the contact surface B.

It should be noted that the coupling device may include not only four contacts, but also five or more contacts, and the detection principle is the same as that of the four contacts, but the cost is higher as the number of contacts is more, so in the embodiment of the present invention, the four contacts are taken as an example for detailed description.

Optionally, the detection means is a temperature sensing element.

Specifically, the detection device may be a temperature sensing element, a pressure sensor, etc., in the embodiment of the present invention, the temperature sensing element is taken as an example for description, and a commonly used temperature sensing element may be an NTC (Negative temperature coefficient) whose two ends are respectively connected to the contact surfaces a and B as shown in fig. 2.

It should be noted that the detection device may comprise three or even more connections for certain types, and that for detection purposes each connection needs to be connected to two contacts via at least one contact surface, regardless of the number of connections of the detection device. In the embodiment of the present invention, the temperature sensing element includes two ends as an example for detailed description.

In 2 contacts contacted with the same contact surface, the connection of 1 contact is used for forming an original temperature measuring loop, the other 1 contact is used for forming a detection loop of contact impedance, and the two loops are connected with a controller. Normally, the contact impedance between 2 contacts contacting the same contact surface is approximately 0, and the voltages of the 2 contacts are approximately the same. When the contact is oxidized or corroded, the contact impedance between 2 contacts in contact with the same contact surface is larger, and the voltage difference between the 2 contacts is larger. The controller can be a single chip microcomputer and is provided with a plurality of sampling ends, and the voltage values of the temperature measuring loop and the detection loop can be respectively collected through the plurality of sampling ends, so that whether the contact of the coupling device is good or not can be detected, and the current sampling temperature can be determined.

For example, as shown in FIG. 3, the first contact S1-1 and the fourth contact S2-1 form an original temperature measuring circuit, the second contact S1-2 and the third contact S2-2 form a contact impedance detecting circuit, wherein the first contact S1-1 is connected to the DC power supply 5V, and the fourth contact S2-1 is connected to the ground. The first contact S1-1, the second contact S1-2 and the third contact S2-2 are respectively connected with three sampling ends of the single chip microcomputer, specifically, the first contact S1-1 is connected with the first sampling end AD _ JUDGE _1, the second contact S1-2 is connected with the second sampling end AD _ JUDGE _2, and the third contact S2-2 is connected with the third sampling end AD _ JUDGE _ 3. The singlechip can acquire three voltage values, namely V1, V2 and V3, through three sampling ends, and can detect whether the contact of the coupling device is good or not according to the three voltage values.

Optionally, the controller comprises: a first processing unit. The first processing unit is used for judging whether the difference between the voltage values corresponding to the first contact and the second contact is smaller than or equal to a first preset value or not and whether the voltage value corresponding to the third contact is smaller than or equal to a second preset value or not so as to determine whether the coupling device is normally contacted or not.

Specifically, due to oxidation or corrosion of the contact, the voltage values corresponding to the contacts connected to the same end of the detection device have a large difference, that is, the difference between the two voltage values is greater than a threshold, that is, the first preset value mentioned above, the threshold may be 0.03V, and the threshold at which oxidation or corrosion of the contact occurs may be determined according to an error allowed by detection. Since the fourth contact is grounded, only the voltage value of the third contact can be acquired, and by comparing whether the voltage value of the third contact is greater than a threshold value, i.e., the second preset value, which is theoretically approximately 0, the threshold value of the contact at which oxidation or corrosion occurs can also be determined according to the error allowed by the detection.

For example, as shown in fig. 3, in order to prevent the temperature measurement inaccuracy caused by the contact impedance, the contact impedance at the contact surfaces a and B may be detected first, and the voltage value V1 may be acquired through the first sampling terminal AD _ JUDGE _1, the voltage value V2 may be acquired through the second sampling terminal AD _ JUDGE _2, and the voltage value V3 may be acquired through the third sampling terminal AD _ JUDGE _3, where allowable error amounts △ V1 (i.e., the above-mentioned first preset value) and △ V2 (i.e., the above-mentioned second preset value) may be set.

Through above-mentioned scheme, detect through the voltage value that corresponds the contact of connecting in detection device with the end, realize detecting whether there is the purpose of impedance in every contact surface, further realize detecting whether the contact of coupling device is by oxidation or corruption, reached the degree of accuracy that promotes the temperature measurement data, promote cooking utensil's security, promote the effect that user experience felt and good sensitivity.

Optionally, the detection circuit further comprises: and an alarm device.

The alarm device is connected with the controller and used for generating corresponding alarm prompt information under the condition that the coupling device is determined to be abnormal in contact.

Specifically, after the contact impedance of any one contact surface is determined to be large through the scheme, in order to avoid inaccurate temperature measurement caused by the contact impedance between the contacts, alarm prompt information can be generated to prompt a user to wipe the contacts of the coupling device, and the contacts are used after being wiped clean or have other faults and are maintained. The alarm device may be a display screen, a speaker or a buzzer, and the alarm prompt message may be a prompt text or a voice message displayed on the display screen, for example, a message "the contact of the coupling device is oxidized or corroded and needs to be cleaned or repaired" is displayed, or a corresponding fault code is displayed, so that a user can determine that the contact of the coupling device is oxidized or corroded and needs to be cleaned or repaired, and the alarm prompt message may be a buzzer sound emitted by the buzzer, so that the user can determine that the contact of the coupling device is oxidized or corroded and needs to be cleaned or repaired.

Through the technical scheme, the alarm device alarms under the condition that the coupling device is abnormal in contact, so that a user can timely clean or maintain the contact of the coupling device, the accuracy of temperature measurement data is further improved, the safety of a cooking appliance is improved, and the effects of user experience and good sensitivity are improved.

Optionally, the controller further comprises: a second processing unit.

And the second processing unit is used for obtaining the current sampling temperature based on the voltage value corresponding to the first contact under the condition that the coupling device is determined to be normally contacted.

Specifically, if the contact impedances at all the contact surfaces are within a reasonable range, that is, (V2-V1) < △ V1, and V3< △ V2, the current sampling temperature can be calculated from the voltage value corresponding to the first contact.

Through above-mentioned scheme, through obtaining current sampling temperature after confirming that coupling device contact is normal, further reached the degree of accuracy that promotes the temperature measurement data, promote cooking utensil's security, promote the effect that user experience felt and good sensitivity.

Optionally, the detection circuit further comprises: three protection modules, including: the protection device comprises a first protection module, a second protection module and a third protection module, wherein the first protection module is connected between a first contact and a first sampling end, the second protection module is connected between a second contact and a second sampling end, and the third protection module is connected between a third contact and a third sampling end.

Specifically, in order to avoid that the voltage value collected by the sampling end is too high and affects the normal use of the controller, and in order to filter the collected voltage value and avoid the influence of noise waves on the detection result, as shown in fig. 3, a protection module may be respectively connected between the first contact S1-1, the second contact S1-2, the third contact S2-2, the first sampling end AD _ JUDGE _1, the second sampling end AD _ JUDGE _2, and the third sampling end AD _ JUDGE _3, so that the accuracy of temperature measurement data is further improved, the safety of the cooking appliance is improved, and the user experience and good sensitivity are improved.

Optionally, each protection module comprises: the circuit comprises a first resistor, a first capacitor and a second capacitor. Wherein the first resistor is connected between the contact and the sampling end; the first capacitor is connected between the contact and the ground; the second capacitor is connected between the sampling terminal and ground.

Specifically, the protection module may include a resistor and two capacitors, and the resistance value of the resistor is 4.7k Ω. As shown in fig. 3, a first resistor R15 is connected in series between the first contact S1-1 and the first sampling terminal AD _ judgge _1, one end of the first capacitor C3 is connected to the first contact S1-1, the other end is grounded, one end of the second capacitor C4 is connected to the first sampling terminal AD _ judgge _1, and the other end is grounded. A first resistor R4 is connected between the second contact S1-2 and the second sampling end AD _ JUDGE _2 in series, one end of a first capacitor C6 is connected with the second contact S1-2, the other end of the first capacitor C6 is grounded, one end of a second capacitor C5 is connected with the second sampling end AD _ JUDGE _2, and the other end of the second capacitor C5 is grounded. A first resistor R11 is connected between the third contact S2-2 and the third sampling end AD _ JUDGE _3 in series, one end of a first capacitor C8 is connected with the third contact S2-2, the other end of the first capacitor C8 is grounded, one end of a second capacitor C7 is connected with the third sampling end AD _ JUDGE _3, and the other end of the second capacitor C7 is grounded.

Through above-mentioned scheme, avoid the magnitude of voltage that the sampling end gathered too high through setting up first resistance, carry out filtering through setting up first electric capacity and second electric capacity, avoid the influence of clutter to the testing result.

Optionally, the detection circuit further comprises: a second resistor, wherein the second resistor is connected between the first contact and the DC power source.

Specifically, as shown in fig. 3, the first resistor may be a resistor R1 connected between the first contact S1-1 and the 5V dc power source, and the resistance of the resistor is 5.1k Ω. The second resistor is arranged to prevent the temperature sensing element from being damaged due to overlarge current, so that the normal use of the temperature sensing element is influenced.

Example 2

In accordance with an embodiment of the present invention, there is provided an embodiment of a method for detecting a coupling device, it being noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions and that, although a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than that presented herein.

Fig. 4 is a flowchart of a method for detecting a coupling device according to an embodiment of the present invention, as shown in fig. 1, the coupling device includes: four contacts and at least two contact surfaces, each contact surface simultaneously with one or two contact, the four contacts include: the first end of the detection device is connected with the first contact and the second contact through at least one first contact surface, the second end of the detection device is connected with the third contact and the fourth contact through at least one second contact surface, the first sampling end of the controller is connected with the first contact and the direct-current power supply, the second sampling end of the controller is connected with the second contact, the third sampling end of the controller is connected with the third contact, and the fourth contact is grounded. As shown in fig. 4, the detection method includes the following steps:

step S402, acquiring voltage values acquired by the first sampling end, the second sampling end and the third sampling end to obtain voltage values corresponding to the first contact, the second contact and the third contact.

And step S404, determining whether the coupling device is normally contacted or not based on the voltage values corresponding to the first contact, the second contact and the third contact.

Optionally, the detection means is a temperature sensing element.

Optionally, in step S404, determining whether the coupling device is normally contacted based on the voltage values corresponding to the first contact, the second contact and the third contact, includes: acquiring the difference between voltage values corresponding to the first contact and the second contact to obtain a voltage difference value; judging whether the voltage difference value is smaller than or equal to a first preset value or not, and whether the voltage value corresponding to the third contact is smaller than or equal to a second preset value or not; and if the voltage difference value is greater than the first preset value or the voltage value corresponding to the third contact is greater than the second preset value, determining that the coupling device is in contact abnormity.

Optionally, if the voltage difference is less than or equal to the first preset value and the voltage value corresponding to the third contact is less than or equal to the second preset value, it is determined that the coupling device is in normal contact.

Specifically, if the contact resistances at all the contact surfaces are within a reasonable range, that is, (V2-V1) < △ V1, and V3< △ V2, it can be determined that the coupling device is in contact normally, and does not affect the temperature measurement.

Optionally, in case of determining that the coupling device is in contact anomaly, generating corresponding alarm prompt information.

Optionally, in a case that it is determined that the coupling device is normally contacted, the current sampling temperature is obtained based on the voltage value corresponding to the second contact.

Specifically, if the contact resistances at all the contact surfaces are within a reasonable range, the current sampling temperature can be calculated from the voltage value corresponding to the first contact if within the reasonable range.

Fig. 5 is a flowchart of an optional detection method for a coupling device according to an embodiment of the present invention, which is illustrated by taking the schematic circuit diagram shown in fig. 3 as an example, and as shown in fig. 5, the method includes the steps of setting an AD _ judgge _1 port as an input, setting an AD _ judgge _2 port as an input, setting an AD _ judgge _3 port as an input, starting ADC sampling, obtaining a voltage V1 through the AD _ judgge _1 port sampling, obtaining a voltage V2 through the AD _ judgge _2 port sampling, setting a minimum allowable error △ V1, determining whether (V2-V1) > △ V1, if yes, prompting that a contact is abnormal, starting failure, if no, obtaining a voltage V3 through the AD _ judgge _3 port sampling, setting a minimum allowable error △ V2, determining whether V3> V2, if yes, starting the contact is abnormal, starting the contact, determining whether impedance is normal, determining that the temperature measurement is normal, and sending the temperature measurement module to the ADC to 685 73742.

Example 3

According to an embodiment of the present invention, an embodiment of a coupling device is provided.

As shown in fig. 1, the coupling device 10 includes: four contacts 11 and at least two contact surfaces 12, wherein each contact surface is in contact with one or two contacts simultaneously.

In 2 contacts contacted with the same contact surface, the connection of 1 contact is used for forming an original temperature measuring loop, the other 1 contact is used for forming a detection loop of contact impedance, and the two loops are connected with a controller. Normally, the contact impedance between 2 contacts contacting the same contact surface is approximately 0, and the voltages of the 2 contacts are approximately the same. When the contact is oxidized or corroded, the contact impedance between 2 contacts in contact with the same contact surface is larger, and the voltage difference between the 2 contacts is larger.

Example 4

According to an embodiment of the present invention, there is provided an embodiment of a cooking appliance, including: the detection circuit of the coupling device.

Specifically, the cooking appliance may be a cooking appliance having a heating function, such as an electric pressure cooker, an electric rice cooker, an induction cooker, and a food processor. Optionally, in the embodiment of the present invention, the cooking appliance is an electric pressure cooker.

Example 5

According to an embodiment of the present invention, an embodiment of a storage medium is provided, where the storage medium includes a stored program, and when the program runs, a device in which the storage medium is located is controlled to execute the detection method of the coupling device in the above embodiment 2.

Example 6

According to an embodiment of the present invention, an embodiment of a processor for running a program is provided, where the program runs to execute the method for detecting a coupling device in embodiment 2.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A detection circuit for a coupling device, comprising:

a coupling device, comprising: four contacts and at least two contact surfaces, each contact surface being in contact with one or two contacts simultaneously, the four contacts comprising: a first contact, a second contact, a third contact, and a fourth contact;

a detection device, comprising: the first end of the detection device is connected with the first contact and the second contact through at least one first contact surface, and the second end of the detection device is connected with the third contact and the fourth contact through at least one second contact surface;

a controller, comprising: first sample terminal, second sample terminal and third sample terminal, first sample terminal with first contact and DC power supply are connected, the second sample terminal with the second contact is connected, the third sample terminal with the third contact is connected, fourth contact ground connection, wherein, the controller is used for based on first contact, the second contact with the voltage value that the third contact corresponds, confirms whether coupling device contacts normally.

2. The detection circuit of claim 1, wherein the controller comprises:

and the first processing unit is used for judging whether the difference between the voltage values corresponding to the first contact and the second contact is smaller than or equal to a first preset value or not and whether the voltage value corresponding to the third contact is smaller than or equal to a second preset value or not so as to determine whether the coupling device is normally contacted or not.

3. The detection circuit of claim 1, further comprising:

and the alarm device is connected with the controller and used for generating corresponding alarm prompt information under the condition that the contact abnormality of the coupling device is determined.

4. The detection circuit of claim 1, wherein the controller further comprises:

5. The detection circuit of claim 1, further comprising:

three protection modules, including: first protection module, second protection module and third protection module, first protection module is connected first contact with between the first sampling end, the second protection module is connected the second contact with between the second sampling end, the third protection module is connected the third contact with between the third sampling end.

6. The detection circuit of claim 5, wherein each protection module comprises:

the first resistor is connected between the contact and the sampling end;

a first capacitor connected between the contact and ground;

and the second capacitor is connected between the sampling end and the ground.

7. The detection circuit of claim 1, further comprising:

a second resistor connected between the first contact and the DC power source.

8. The detection circuit according to claim 1, characterized in that said detection means comprise at least: a temperature sensing element.

9. A method of detecting a coupling device, the coupling device comprising: four contacts and at least two contact surfaces, each contact surface being in contact with one or two contacts simultaneously, the four contacts comprising: the detection device comprises a first contact, a second contact, a third contact and a fourth contact, wherein a first end of the detection device is connected with the first contact and the second contact through at least one first contact surface, a second end of the detection device is connected with the third contact and the fourth contact through at least one second contact surface, a first sampling end of a controller is connected with the first contact and a direct current power supply, a second sampling end of the controller is connected with the second contact, a third sampling end of the controller is connected with the third contact, and the fourth contact is grounded, wherein the detection method further comprises the following steps:

acquiring voltage values acquired by the first sampling end, the second sampling end and the third sampling end to obtain voltage values corresponding to the first contact, the second contact and the third contact;

determining whether the coupling device is normally contacted based on voltage values corresponding to the first contact, the second contact and the third contact.

10. The method for detecting according to claim 9, wherein determining whether the coupling device is normally contacted based on the voltage values corresponding to the first contact, the second contact and the third contact comprises:

acquiring the difference between the voltage values corresponding to the first contact and the second contact to obtain a voltage difference value;

judging whether the voltage difference value is smaller than or equal to a first preset value or not, and whether the voltage value corresponding to the third contact is smaller than or equal to a second preset value or not;

and if the voltage difference value is greater than the first preset value or the voltage value corresponding to the third contact is greater than the second preset value, determining that the coupling device is in contact abnormity.

11. The method according to claim 10, wherein if the voltage difference is less than or equal to the first predetermined value and the voltage value corresponding to the third contact is less than or equal to the second predetermined value, it is determined that the coupling device is in normal contact.

12. The detection method according to claim 9, characterized in that in case of determining the coupling device contact anomaly, a corresponding alarm prompt message is generated.

13. The method of claim 9, wherein the current sampling temperature is obtained based on a voltage value corresponding to the first contact when it is determined that the coupling device is in contact with the normal contact.

14. A coupling device, comprising:

four contacts;

at least two contact surfaces, each contact surface being in contact with one or two contacts simultaneously.

15. A cooking appliance, comprising: detection circuitry for a coupling device as claimed in any one of claims 1 to 8.

16. The cooking appliance of claim 15, wherein the cooking appliance is an electric pressure cooker.

17. A storage medium, characterized in that the storage medium comprises a stored program, wherein when the program runs, the apparatus on which the storage medium is located is controlled to execute the method for detecting a coupling device according to any one of claims 9 to 13.

18. A processor, characterized in that the processor is configured to run a program, wherein the program is configured to execute the method for detecting a coupling device according to any one of claims 9 to 13 when running.