A detection device and a stirring device

Abstract

The present invention relates to a detection device and a stirring device, comprising an oscillation signal generating unit for generating an oscillation signal; a signal transceiver unit connected to the oscillation signal generating unit, receiving the oscillation signal and forwarding the oscillation signal; a frequency selection unit connected to the signal transceiver unit, receiving the oscillation signal forwarded by the signal transceiver unit, and performing frequency selection on the oscillation signal to output a frequency selection signal to the signal transceiver unit; and a control unit connected to the signal transceiver unit, receiving the frequency selection signal and outputting an identification signal according to the frequency selection signal. The detection device selects the frequency of the oscillation signal by setting the frequency selection unit, and the control unit outputs an identification signal according to the frequency selection signal, and the identification signal can be used to detect whether a detected device is installed, or determine the type of the detected device according to the identification signal.

Description

Technical Field

[0001] The present invention relates to the field of household electrical appliance detection, and more specifically, to a detection device and a stirring device. Background Art

[0002] A traditional blender generally includes a base, a blending cup, and a blending cover. Before the blender starts working, the user places the blending cup on the base, covers the blending cup with the blending cover, connects the power supply, selects the corresponding blending function, and the blender starts to perform the corresponding blending work.

[0003] Since users may place the blender cup incorrectly or close the blender lid loosely, or the blender may be mistakenly started without the blender cup placed properly due to incorrect actions, traditional blenders are equipped with an automatic detection function to ensure the blender's operating safety.

[0004] However, the traditional blender can only simply detect whether the blending cup has been placed on the base, but cannot detect whether the blending cup or the blending lid is covered incorrectly. Moreover, the traditional blender detects whether the blending cup has been placed on the base. In the solution adopted, the blending cup and the blending lid are electrified, and the blender is connected to a strong 220V current during operation, which can easily cause the risk of electric shock, has a low safety factor, and a complex circuit structure. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a detection device and a stirring device in view of the above-mentioned defects of the prior art.

[0006] The technical solution adopted by the present invention to solve the technical problem is: to provide a detection device, comprising:

[0007] An oscillation signal generating unit for generating an oscillation signal;

[0008] A signal transceiver unit connected to the oscillation signal generating unit, receiving the oscillation signal and forwarding the oscillation signal;

[0009] A frequency selection unit connected to the signal transceiver unit, receiving the oscillation signal forwarded by the signal transceiver unit, and performing frequency selection on the oscillation signal to output the selected frequency signal to the signal transceiver unit;

[0010] A control unit connected to the signal transceiver unit, receiving the frequency selection signal and outputting an identification signal according to the frequency selection signal.

[0011] In one embodiment, the oscillation signal generating unit comprises: a source signal generating circuit and an oscillation signal processing circuit;

[0012] The output end of the source signal generating circuit is connected to the input end of the oscillation signal processing circuit, and the output end of the oscillation signal processing circuit is connected to the signal transceiver unit;

[0013] The source signal generating circuit is used to generate a source signal, and the oscillation signal processing circuit receives the source signal and converts the source signal into the oscillation signal.

[0014] In one embodiment, the source signal generating circuit comprises: a source signal control chip, the source signal control chip comprises a clock IC;

[0015] The output end of the clock IC is connected to the input end of the oscillation signal processing circuit as the output end of the source signal generating circuit.

[0016] In one embodiment, the source signal generating circuit includes: a source inductor, a first source capacitor, a second source capacitor, a third source capacitor, a source transistor, a first source resistor, a second source resistor and a third source resistor;

[0017] The first end of the source inductor is connected to the power supply, the second end of the source inductor is connected to the first end of the second source capacitor, the second end of the second source capacitor is connected to the first end of the third source capacitor, and the second end of the third source capacitor is connected to the negative terminal;

[0018] The second end of the source inductor is also connected to the collector of the source transistor, the emitter of the source transistor is respectively connected to the first end of the third source capacitor and the first end of the third source resistor, the base of the source transistor is connected to the second end of the first source resistor and the first end of the second source resistor, and the second end of the second source resistor and the second end of the third source resistor are connected to the negative end; the first end of the first source resistor is connected to the power supply, and the first end of the first source resistor and the second end of the second source resistor are also connected to the input end of the oscillation signal processing circuit; the first end of the first source capacitor is connected to the base of the source transistor, and the second end of the first source capacitor is connected to the negative end;

[0019] A connection end between the first end of the first source resistor and the second end of the second source resistor is an output end of the source signal generating circuit.

[0020] In one embodiment, the source signal generating circuit comprises: a single chip microcomputer, wherein an output end of the single chip microcomputer is connected to an input end of the oscillation signal processing circuit.

[0021] In one embodiment, the oscillation signal processing circuit includes: a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a first MOS transistor, and a second MOS transistor;

[0022] The drain of the second MOS transistor is connected to the power supply, the source of the second MOS transistor is connected to the first end of the fourth resistor, and the gate of the second MOS transistor is connected to the first end of the fifth resistor and the first end of the sixth resistor; the second end of the fourth resistor and the second end of the fifth resistor are connected to the negative end, the second end of the sixth resistor is connected to the first end of the seventh resistor, and the second end of the sixth resistor and the first end of the seventh resistor are also connected to the output end of the source signal generating circuit;

[0023] The second end of the seventh resistor is connected to the first end of the eighth resistor and the gate of the first MOS transistor, the second end of the eighth resistor and the second end of the ninth resistor are connected to the negative end, the source of the first MOS transistor is connected to the first end of the ninth resistor, and the drain of the first MOS transistor is connected to the input end of the signal transceiver unit;

[0024] The connection end between the second end of the sixth resistor and the first end of the seventh resistor is the input end of the oscillation signal processing circuit, and the drain of the first MOS transistor is the output end of the oscillation signal processing circuit.

[0025] In one embodiment, the signal transceiver unit includes: at least one signal transmitting circuit and a signal receiving circuit corresponding to the at least one signal transmitting circuit;

[0026] The input end of the signal transmitting circuit is connected to the output end of the oscillation signal generating unit as the input end of the signal transceiver unit, and the output end of the signal transmitting circuit is connected to the input end of the frequency selection unit;

[0027] The input end of the signal receiving circuit is connected to the output end of the frequency selection unit, and the output end of the signal receiving circuit is connected to the control unit as the output end of the signal transceiver unit.

[0028] In one embodiment, the signal transmitting circuit includes at least one set of first LC oscillation circuits.

[0029] In one embodiment, the signal receiving circuit includes at least one set of second LC oscillating circuits.

[0030] In one embodiment, the frequency selection unit includes at least two groups of third LC oscillation circuits.

[0031] In one embodiment, the frequency selection unit includes at least two groups of fourth LC oscillation circuits and electromagnets.

[0032] In one embodiment, it further includes: at least one frequency selection channel;

[0033] One end of each of the frequency selection channels is connected to one end of the signal receiving circuit, and the other end of the frequency selection channel is connected to the frequency selection control port of the control unit.

[0034] In one embodiment, the frequency selection channel includes an adjustment capacitor, one end of the adjustment capacitor is connected to one end of the signal receiving circuit, and the other end of the adjustment capacitor is connected to the frequency selection control port of the control unit.

[0035] In one embodiment, the frequency selection control port of the control unit is arranged corresponding to the at least one frequency selection channel.

[0036] In one embodiment, it further includes: at least one receiving signal processing circuit, the input end of the receiving signal processing circuit is connected to the output end of the signal transceiver unit, and the output end of the receiving signal processing circuit is connected to the control unit.

[0037] In one embodiment, the received signal processing circuit includes: a bias circuit, an amplification circuit and a comparison circuit;

[0038] The input end of the bias circuit is connected to the output end of the signal transceiver unit as the input end of the received signal processing circuit, the output end of the bias circuit is connected to the input end of the amplifier circuit, the output end of the amplifier circuit is connected to the input end of the comparison circuit, and the output end of the comparison circuit is connected to the control unit as the output end of the received signal processing circuit.

[0039] In one embodiment, the bias circuit includes: a tenth resistor, an eleventh resistor, a twelfth resistor, a fourth capacitor and a first transistor;

[0040] The first end of the tenth resistor is connected to the output end of the signal transceiver unit, the second end of the tenth resistor is connected to the first end of the fourth capacitor, the second end of the fourth capacitor is connected to the base of the first transistor and the second end of the twelfth resistor, the first end of the twelfth resistor and the first end of the eleventh resistor are connected to a power supply, and the second end of the eleventh resistor is connected to the collector of the first transistor; the collector of the first transistor is also connected to the input end of the amplifier circuit, and the emitter of the first transistor is connected to the negative terminal;

[0041] The first end of the tenth resistor is the input end of the bias circuit, and the collector of the first transistor is the output end of the bias circuit.

[0042] In one embodiment, the amplifying circuit includes: an amplifier, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor and a fifth capacitor;

[0043] The positive input terminal of the amplifier is connected to the output terminal of the bias circuit, the negative input terminal of the amplifier is connected to the negative terminal through the thirteenth resistor, the first end of the fourteenth resistor is connected to the negative input terminal of the amplifier, the second end of the fourteenth resistor is connected to the first end of the fifth capacitor and the output terminal of the amplifier, the second end of the fifth capacitor is connected to the negative terminal, the output terminal of the amplifier is connected to the first end of the fifteenth resistor, and the second end of the fifteenth resistor is connected to the input terminal of the comparison circuit;

[0044] The positive input terminal of the amplifier is the input terminal of the amplifier circuit, and the second terminal of the fifteenth resistor is the output terminal of the amplifier circuit.

[0045] In one embodiment, the comparison circuit includes: a comparator, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor and a sixth capacitor;

[0046] The positive input terminal of the comparator is connected to the output terminal of the amplifier circuit, the negative input terminal of the comparator is connected to the first terminal of the sixteenth resistor and the first terminal of the seventeenth resistor, the second terminal of the sixteenth resistor is connected to the negative terminal, the second terminal of the seventeenth resistor and the ground terminal of the comparator are connected to the negative terminal, the output terminal of the comparator is connected to the first terminal of the eighteenth resistor, the second terminal of the eighteenth resistor is connected to the first terminal of the sixth capacitor, the second terminal of the eighteenth resistor is also connected to the control unit, and the second terminal of the sixth capacitor is connected to the negative terminal;

[0047] The positive input terminal of the comparator is the input terminal of the comparison circuit, and the second terminal of the eighteenth resistor is the output terminal of the comparison circuit.

[0048] The present invention also provides a stirring device, comprising the above-mentioned detection device.

[0049] In one embodiment, the device further comprises: a base, a stirring body, and a cover body covering the stirring body; the detection device comprises an oscillation signal generating unit, a signal transceiver unit, and a control unit arranged on the base, and further comprises a frequency selection unit arranged on the stirring body and the cover body;

[0050] The oscillation signal generating unit is used to generate an oscillation signal, the signal transceiver unit is connected to the oscillation signal generating unit, receives the oscillation signal and forwards the oscillation signal to the frequency selection unit, the frequency selection unit receives the oscillation signal and outputs a frequency selection signal to the signal transceiver unit according to the frequency selection signal, so as to be sent to the control unit through the signal transceiver unit, and the control unit outputs an identification signal according to the frequency selection signal.

[0051] The detection device implementing the present invention has the following beneficial effects: the detection device selects the frequency of the oscillation signal by setting a frequency selection unit to output a frequency selection signal, and outputs an identification signal according to the frequency selection signal through the control unit. The identification signal can effectively detect whether the detected device is installed, and the type of the detected device can be determined according to the identification signal, which can achieve the effect of detecting whether the detected device has been installed and whether the detected device is used incorrectly.

[0052] In addition, the detection device has a simple structure, the detected device is not electrified, and has high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0054] Figure 1 is a principle block diagram of a detection device provided by an embodiment of the present invention;

[0055] Figure 2 It is a circuit schematic diagram of a frequency selection unit and a signal transceiver unit provided in an embodiment of the present invention;

[0056] Figure 3 is a circuit schematic diagram of a first embodiment of a source signal generating circuit provided by the present invention;

[0057] Figure 4 is a circuit schematic diagram of a second embodiment of a source signal generating circuit provided by the present invention;

[0058] Figure 5 1 is a circuit schematic diagram of a third embodiment of a source signal generating circuit provided by the present invention;

[0059] Figure 6 The invention discloses a circuit schematic diagram of a receiving signal processing circuit. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] refer to Figure 1, is a principle block diagram of a detection device provided in an embodiment of the present invention. The detection device can be installed in various mixing devices such as a blender, a soymilk machine, and a wall-breaking machine. By setting up the detection device, it is possible to effectively detect whether there is a mixing cup after the detected device (such as a mixing cup, a mixing cover, etc. of a blender) is powered on, or whether the mixing cover is closed on the mixing cup. It is also possible to detect the type of the detected device, such as which type of mixing cup it is, so as to determine whether the wrong mixing cup is used. In addition, the detection device has a simple structure, the detected device is not electrified, and has high safety.

[0062] Specifically, Figure 1 As shown, the detection device includes: an oscillation signal generating unit 10, a signal transceiver unit 20, a frequency selection unit 30 and a control unit 40. In practical applications, such as a blender, the oscillation signal generating unit 10, the signal transceiver unit 20 and the control unit 40 can be arranged on the base 100 of the blender, and the frequency selection unit 30 can be arranged on the blender cup and / or the blender cover (and the cover of the blender).

[0063] Further, in some embodiments, the oscillation signal generating unit 10 is an oscillation signal generating unit 10 for generating an oscillation signal. The oscillation signal generating unit 10 can generate an oscillation signal in a variety of ways, for example, the oscillation signal can be generated by a clock IC, or by a single-chip microcomputer, or by a combination of a capacitor and an inductor. Of course, it can be understood that the oscillation signal generating unit 10 can also generate an oscillation signal in other ways, not limited to the examples described in the present invention.

[0064] Further, in some embodiments, the oscillation signal generating unit 10 includes: a source signal generating circuit 101 and an oscillation signal processing circuit 102. The output end of the source signal generating circuit 101 is connected to the input end of the oscillation signal processing circuit 102, and the output end of the oscillation signal processing circuit 102 is connected to the signal transceiver unit 20; the source signal generating circuit 101 is used to generate a source signal, and the oscillation signal processing circuit 102 receives the source signal and converts the source signal into an oscillation signal.

[0065] The signal transceiver unit 20 is connected to the oscillation signal generating unit 10, receives the oscillation signal and forwards the oscillation signal.

[0066] Furthermore, in some embodiments, the signal transceiver unit 20 includes: at least one signal transmitting circuit 201 and a signal receiving circuit 202 arranged corresponding to the at least one signal transmitting circuit 201 .

[0067] Among them, the input end of the signal transmitting circuit 201 is connected to the output end of the oscillation signal generating unit 10 as the input end of the signal transceiver unit 20, and the output end of the signal transmitting circuit 201 is connected to the input end of the frequency selection unit 30; the input end of the signal receiving circuit 202 is connected to the output end of the frequency selection unit 30, and the output end of the signal receiving circuit 202 is connected to the control unit 40 as the output end of the signal transceiver unit 20.

[0068] Furthermore, the signal transmitting circuit 201 can be implemented by an LC oscillator circuit. Specifically, the signal transmitting circuit 201 can include at least one group of first LC oscillator circuits, that is, the signal transmitting circuit 201 can be implemented by one group of first LC oscillator circuits, or by multiple groups of LC oscillator circuits, which is determined according to product design requirements.

[0069] Furthermore, the signal receiving circuit 202 may be implemented by an LC oscillating circuit. Specifically, the signal receiving circuit 202 may include at least one set of second LC oscillating circuits, that is, the signal receiving circuit 202 may be implemented by one set of second LC oscillating circuits, or may be implemented by multiple sets of LC oscillating circuits, which is determined specifically according to product design requirements.

[0070] The frequency selection unit 30 is connected to the signal transceiver unit 20 , receives the oscillation signal forwarded by the signal transceiver unit 20 , and performs frequency selection on the oscillation signal to output the selected frequency signal to the signal transceiver unit 20 .

[0071] Further, the frequency selection unit 30 can be implemented by an LC oscillation circuit. Specifically, the signal transmission circuit 201 may include at least two groups of third LC oscillation circuits, that is, the frequency selection unit 30 requires at least two groups of third LC oscillation circuits, and when two groups of third LC oscillation circuits are provided, one group of third LC oscillation circuits is used to receive the oscillation signal transmitted by the signal transceiver unit 20, and the other group of third LC oscillation circuits is used to receive the returned oscillation signal to output the frequency selection signal. For example, in a blender application, the frequency selection unit 30 may be disposed in a blender cup of the blender. In one embodiment, the frequency selection unit 30 may be provided with two sets of third LC oscillation circuits, and the two sets of third LC oscillation circuits are both disposed at the bottom of the blender cup, and the two sets of third LC oscillation circuits are short-circuited together at the top of the blender cup. Alternatively, in other embodiments, the frequency selection unit 30 may be provided with two sets of third LC oscillation circuits and be configured with an electromagnet. In this case, the two sets of third LC oscillation circuits are both disposed at the bottom of the blender cup and are not short-circuited at the top of the blender cup. The electromagnet may be disposed on the cup cover of the blender. When the cup cover is closed on the blender cup, the two sets of third LC oscillation circuits may be attracted at the top of the blender cup by the magnetic attraction of the electromagnet, thereby realizing the connection of the two sets of third LC oscillation circuits. Figure 2As shown. Alternatively, in other embodiments, the frequency selection unit 30 may be provided with multiple groups of third LC oscillation circuits. For example, six groups of third LC oscillation circuits may be provided, wherein two groups of third LC oscillation circuits are provided at the bottom of the blending cup, two groups of third LC oscillation circuits are provided at the top of the blending cup, and the other two groups of third LC oscillation circuits are provided on the cup cover. In this embodiment, the four groups of third LC oscillation circuits provided on the blending cup form two paths, one for signal transmission and the other for signal return. That is, the two paths are not connected, and may be provided in a left-right symmetrical manner, wherein the two groups of third LC oscillation circuits on the same side are connected, and the two groups of third LC oscillation circuits provided on the cup cover are short-circuited together.

[0072] Furthermore, the signal transmitting circuit 201, the signal receiving circuit 202, and the frequency selection unit 30 of the embodiment of the present invention are all implemented by LC oscillation circuits, so the signal transmitting circuit 201 and the frequency selection unit 30, and the signal receiving circuit 202 and the frequency selection unit 30 can all be transmitted, transmitted, and received by magnetic induction. That is, the detected device of the embodiment of the present invention can complete signal transmission and reception without being powered, which is safe and efficient.

[0073] Furthermore, the LC oscillation circuits selected in the signal transceiver unit 20 and the frequency selection unit 30 of the embodiment of the present invention may be the same or different.

[0074] Furthermore, in some embodiments, the LC oscillation circuit is composed of an inductor and a capacitor connected in parallel.

[0075] like Figure 2 As shown, in this embodiment, the signal transmitting circuit 201 includes two groups of first LC oscillation circuits, the frequency selection unit 30 includes two groups of third LC oscillation circuits and electromagnets, and the signal receiving circuit 202 includes two groups of second LC oscillation circuits.

[0076] Furthermore, if Figure 1 As shown, the control unit 40 is connected to the signal transceiver unit 20, receives the frequency selection signal and outputs the identification signal according to the frequency selection signal. In the embodiment of the present invention, the frequency selection signal output by the signal transceiver unit 20 to the control unit 40 includes a single level signal (a high level signal or a low level signal) or a square wave signal, wherein when the signal transceiver unit 20 outputs a single level signal, it indicates that there is no device to be detected, and when the signal transceiver unit 20 outputs a square wave signal, it indicates that there is a device to be detected. Therefore, the control unit 40 can output the corresponding identification signal by receiving the frequency selection signal and processing the frequency selection signal.

[0077] Specifically, when the frequency-selected signal outputs a single-level signal, the control unit 40 determines that there is no detected device based on the single-level signal, and then outputs an identification signal that there is no detected device (for example, in a specific application, 0 can be used to indicate that there is no detected device, and 1 can be used to indicate that there is a detected device). When the frequency-selected signal outputs a square wave signal, the control unit 40 determines that there is a detected device based on the square wave signal. At this time, the control unit 40 outputs an identification signal of 1 and processes the received square wave signal at the same time to determine the type of the detected device.

[0078] Furthermore, in some embodiments, by adopting an LC oscillation circuit, the control unit 40 processes the square wave signal to obtain the frequency of the third LC oscillation circuit in the frequency selection unit 30, and then compares the frequency with the pre-stored frequency to determine the type of the detected device.

[0079] Furthermore, in some embodiments, Figure 2 As shown, the detection device further includes: at least one frequency selection channel 50. One end of each frequency selection channel 50 is connected to one end of the signal receiving circuit 202, and the other end of the frequency selection channel 50 is connected to the frequency selection control port of the control unit 40. By setting the frequency selection channel 50, the signal receiving circuit 202 can preset multiple frequency selection networks, and can realize the detection and identification of multiple types of detected devices. Among them, the control unit 40 controls the frequency selection control port to query the frequency of the detected device in turn to identify the types of different detected devices.

[0080] The detection device of the embodiment of the present invention utilizes the magnetic induction principle of the LC oscillation circuit to realize the detection of the presence of the detected device and the automatic identification of the type in a wireless and passive manner. It effectively isolates strong electricity, the detected device is not charged, has high safety, and has a simple structure, effectively simplifies the circuit design, and has low cost.

[0081] Each circuit is described below with reference to specific embodiments.

[0082] like Figure 3 In some embodiments, the source signal generating circuit 101 includes: a source signal control chip (U4), the source signal control chip includes a clock IC. The output end of the clock IC is connected to the input end of the oscillation signal processing circuit 102 as the output end of the source signal generating circuit 101. The clock IC can be NE555.

[0083] Furthermore, in some other embodiments, Figure 4 As shown, the source signal generating circuit 101 includes: a source inductor L11, a first source capacitor C11, a second source capacitor C12, a third source capacitor C13, a source transistor T3, a first source resistor R29, a second source resistor R30 and a third source resistor R31.

[0084] A first end of the source inductor L11 is connected to a power source, a second end of the source inductor L11 is connected to a first end of the second source capacitor C12, a second end of the second source capacitor C12 is connected to a first end of the third source capacitor C13, and a second end of the third source capacitor C13 is connected to a negative terminal (-5V).

[0085] The second end of the source inductor L11 is also connected to the collector of the source transistor T3, the emitter of the source transistor T3 is respectively connected to the first end of the third source capacitor C13 and the first end of the third source resistor R31, the base of the source transistor T3 is connected to the second end of the first source resistor R29 and the first end of the second source resistor R30, the second end of the second source resistor R30 and the second end of the third source resistor R31 are connected to the negative end; the first end of the first source resistor R29 is connected to the power supply, and the first end of the first source resistor R29 and the second end of the second source resistor R30 are also connected to the input end of the oscillation signal processing circuit 102; the first end of the first source capacitor C11 is connected to the base of the source transistor T3, and the second end of the first source capacitor C11 is connected to the negative end; the connection end of the first end of the first source resistor R29 and the second end of the second source resistor R30 is the output end of the source signal generating circuit 101.

[0086] Furthermore, in some other embodiments, Figure 5 As shown, the source signal generating circuit 101 includes: a single chip microcomputer (IC), the output end of the single chip microcomputer is connected to the input end of the oscillation signal processing circuit 102.

[0087] Furthermore, in some other embodiments, Figure 3 , 4 As shown in FIG. 5 , the oscillation signal processing circuit 102 includes: a fourth resistor R4 , a fifth resistor R5 , a sixth resistor R6 , a seventh resistor R7 , an eighth resistor R8 , a ninth resistor R9 , a first MOS transistor T1 , and a second MOS transistor T2 .

[0088] The drain of the second MOS tube T2 is connected to the power supply, the source of the second MOS tube T2 is connected to the first end of the fourth resistor R4, and the gate of the second MOS tube T2 is connected to the first end of the fifth resistor R5 and the first end of the sixth resistor R6; the second end of the fourth resistor R4 and the second end of the fifth resistor R5 are connected to the negative end, the second end of the sixth resistor R6 is connected to the first end of the seventh resistor R7, and the second end of the sixth resistor R6 and the first end of the seventh resistor R7 are also connected to the output end of the source signal generating circuit 101.

[0089] The second end of the seventh resistor R7 is connected to the first end of the eighth resistor R8 and the gate of the first MOS transistor T1, the second end of the eighth resistor R8 and the second end of the ninth resistor R9 are connected to the negative end, the source of the first MOS transistor T1 is connected to the first end of the ninth resistor R9, and the drain of the first MOS transistor T1 is connected to the input end of the signal transceiver unit 20; the connection end between the second end of the sixth resistor R6 and the first end of the seventh resistor R7 is the input end of the oscillation signal processing circuit 102, and the drain of the first MOS transistor T1 is the output end of the oscillation signal processing circuit 102.

[0090] like Figure 2 As shown, the frequency selection channel 50 includes an adjustment capacitor, one end of the adjustment capacitor (CX1 / CX2) is connected to one end of the signal receiving circuit 202, and the other end of the adjustment capacitor is connected to the frequency selection control port of the control unit 40. Figure 2 In the embodiment, the regulating capacitors include two, which, combined with the LC oscillation circuit in the signal receiving circuit 202, can realize the detection of three selected frequencies.

[0091] The frequency selection control port of the control unit 40 is arranged corresponding to at least one frequency selection channel 50 .

[0092] Furthermore, if Figure 6 The detection device further includes: at least one receiving signal processing circuit 60, the input end of the receiving signal processing circuit 60 is connected to the output end of the signal transceiver unit 20, and the output end of the receiving signal processing circuit 60 is connected to the control unit 40. Since the frequency-selective signal output by the signal receiving circuit 202 is small and not easy to be recognized and processed by the control unit 40, it is necessary to process the frequency-selective signal output by the signal receiving circuit 202 to obtain a recognizable and processable signal.

[0093] Furthermore, the receiving signal processing circuit 60 includes: a bias circuit 601 , an amplifying circuit 602 and a comparing circuit 603 .

[0094] The input end of the bias circuit 601 is connected to the output end of the signal transceiver unit 20 as the input end of the receiving signal processing circuit 60, the output end of the bias circuit 601 is connected to the input end of the amplifier circuit 602, the output end of the amplifier circuit 602 is connected to the input end of the comparison circuit 603, and the output end of the comparison circuit 603 is connected to the control unit 40 as the output end of the receiving signal processing circuit 60.

[0095] In some embodiments, the bias circuit 601 includes: a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a fourth capacitor C4 and a first transistor Q1.

[0096] The first end of the tenth resistor R10 is connected to the output end of the signal transceiver unit 20, the second end of the tenth resistor R10 is connected to the first end of the fourth capacitor C4, the second end of the fourth capacitor C4 is connected to the base of the first transistor Q1 and the second end of the twelfth resistor R12, the first end of the twelfth resistor R12 and the first end of the eleventh resistor R11 are connected to the power supply, and the second end of the eleventh resistor R11 is connected to the collector of the first transistor Q1; the collector of the first transistor Q1 is also connected to the input end of the amplifier circuit 602, and the emitter of the first transistor Q1 is connected to the negative end; the first end of the tenth resistor R10 is the input end of the bias circuit 601, and the collector of the first transistor Q1 is the output end of the bias circuit 601.

[0097] In some embodiments, the amplifying circuit 602 includes: an amplifier U5B, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, and a fifth capacitor C5.

[0098] The positive input terminal of the amplifier U5B is connected to the output terminal of the bias circuit 601, the negative input terminal of the amplifier U5B is connected to the negative terminal through the thirteenth resistor R13, the first end of the fourteenth resistor R14 is connected to the negative input terminal of the amplifier U5B, the second end of the fourteenth resistor R14 is connected to the first end of the fifth capacitor C5 and the output terminal of the amplifier U5B, the second end of the fifth capacitor C5 is connected to the negative terminal, the output terminal of the amplifier U5B is connected to the first end of the fifteenth resistor R15, and the second end of the fifteenth resistor R15 is connected to the input terminal of the comparison circuit 603; the positive input terminal of the amplifier U5B is the input terminal of the amplifier circuit 602, and the second end of the fifteenth resistor R15 is the output terminal of the amplifier circuit 602.

[0099] In some embodiments, the comparison circuit 603 includes: a comparator U5A, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18 and a sixth capacitor C6.

[0100] The positive input terminal of the comparator U5A is connected to the output terminal of the amplifier circuit 602, the negative input terminal of the comparator U5A is connected to the first terminal of the sixteenth resistor R16 and the first terminal of the seventeenth resistor R17, the second terminal of the sixteenth resistor R16 is connected to the negative terminal, the second terminal of the seventeenth resistor R17 and the ground terminal of the comparator U5A are connected to the negative terminal, the output terminal of the comparator U5A is connected to the first terminal of the eighteenth resistor R18, the second terminal of the eighteenth resistor R18 is connected to the first terminal of the sixth capacitor C6, and the second terminal of the eighteenth resistor R18 is also connected to the control unit 40 (specifically, Figure 2 As shown, the CHECK IO detection port of the control unit 40 is connected, the second end of the sixth capacitor C6 is connected to the negative end; the positive input end of the comparator U5A is the input end of the comparison circuit 603, and the second end of the eighteenth resistor R18 is the output end of the comparison circuit 603.

[0101] The present invention further provides a stirring device, including the detection device provided in the embodiment of the present invention. The stirring device can be various stirring products such as a blender, a soybean milk maker, and a wall breaking machine.

[0102] The stirring device also includes: a base, a stirring body and a cover body covering the stirring body; the detection device includes an oscillation signal generating unit 10, a signal transceiver unit 20 and a control unit 40 arranged on the base, and also includes a frequency selection unit 30 arranged on the stirring body and the cover body.

[0103] The oscillation signal generating unit 10 is used to generate an oscillation signal. The signal transceiver unit 20 is connected to the oscillation signal generating unit 10, receives the oscillation signal and forwards the oscillation signal to the frequency selection unit 30. The frequency selection unit 30 receives the oscillation signal and outputs the frequency selection signal to the signal transceiver unit 20 according to the frequency selection signal, so as to be sent to the control unit 40 through the signal transceiver unit 20. The control unit 40 outputs an identification signal according to the frequency selection signal.

[0104] By setting up the detection device, a corresponding identification signal can be obtained through the frequency selection signal output by the signal transceiver unit 20, and based on the identification signal, it can be determined whether there is a stirring body 200 (equivalent to a specific application, such as a stirring cup of a blender) on the base 100 after power-on, or the type of the stirring cup can be automatically identified.

[0105] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot limit the scope of protection of the present invention. All equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

[0106] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A detection device, characterized in that: include: An oscillation signal generating unit for generating an oscillation signal; A signal transceiver unit connected to the oscillation signal generating unit, receiving the oscillation signal and forwarding the oscillation signal; the signal transceiver unit comprises: at least one signal transmitting circuit and a signal receiving circuit corresponding to the at least one signal transmitting circuit; the input end of the signal transmitting circuit is connected to the output end of the oscillation signal generating unit as the input end of the signal transceiver unit, and the output end of the signal transmitting circuit is connected to the input end of the frequency selection unit; the input end of the signal receiving circuit is connected to the output end of the frequency selection unit, and the output end of the signal receiving circuit is connected to the control unit as the output end of the signal transceiver unit; the signal transmitting circuit comprises at least one group of first LC oscillation circuits; the signal receiving circuit comprises at least one group of second LC oscillation circuits; A frequency selection unit connected to the signal transceiver unit, receiving the oscillation signal forwarded by the signal transceiver unit, and performing frequency selection on the oscillation signal to output the frequency-selected signal to the signal transceiver unit; the frequency selection unit includes at least two sets of third LC oscillation circuits; A control unit connected to the signal transceiver unit, receiving the frequency selection signal and outputting an identification signal according to the frequency selection signal.

2. The detection device according to claim 1, characterized in that: The oscillation signal generating unit comprises: a source signal generating circuit and an oscillation signal processing circuit; The output end of the source signal generating circuit is connected to the input end of the oscillation signal processing circuit, and the output end of the oscillation signal processing circuit is connected to the signal transceiver unit; The source signal generating circuit is used to generate a source signal, and the oscillation signal processing circuit receives the source signal and converts the source signal into the oscillation signal.

3. The detection device according to claim 2, characterized in that: The source signal generating circuit comprises: a source signal control chip, wherein the source signal control chip comprises a clock IC; The output end of the clock IC is connected to the input end of the oscillation signal processing circuit as the output end of the source signal generating circuit.

4. The detection device according to claim 2, characterized in that: The source signal generating circuit comprises: a source inductor, a first source capacitor, a second source capacitor, a third source capacitor, a source transistor, a first source resistor, a second source resistor and a third source resistor; The first end of the source inductor is connected to the power supply, the second end of the source inductor is connected to the first end of the second source capacitor, the second end of the second source capacitor is connected to the first end of the third source capacitor, and the second end of the third source capacitor is connected to the negative terminal; The second end of the source inductor is also connected to the collector of the source transistor, the emitter of the source transistor is respectively connected to the first end of the third source capacitor and the first end of the third source resistor, the base of the source transistor is connected to the second end of the first source resistor and the first end of the second source resistor, and the second end of the second source resistor and the second end of the third source resistor are connected to the negative end; the first end of the first source resistor is connected to the power supply, and the first end of the first source resistor and the second end of the second source resistor are also connected to the input end of the oscillation signal processing circuit; the first end of the first source capacitor is connected to the base of the source transistor, and the second end of the first source capacitor is connected to the negative end; A connection end between the first end of the first source resistor and the second end of the second source resistor is an output end of the source signal generating circuit.

5. The detection device according to claim 2, characterized in that: The source signal generating circuit comprises: a single chip microcomputer, and the output end of the single chip microcomputer is connected to the input end of the oscillation signal processing circuit.

6. The detection device according to any one of claims 3 to 5, characterized in that: The oscillation signal processing circuit comprises: a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a first MOS transistor, and a second MOS transistor; The drain of the second MOS transistor is connected to the power supply, the source of the second MOS transistor is connected to the first end of the fourth resistor, and the gate of the second MOS transistor is connected to the first end of the fifth resistor and the first end of the sixth resistor; the second end of the fourth resistor and the second end of the fifth resistor are connected to the negative end, the second end of the sixth resistor is connected to the first end of the seventh resistor, and the second end of the sixth resistor and the first end of the seventh resistor are also connected to the output end of the source signal generating circuit; The second end of the seventh resistor is connected to the first end of the eighth resistor and the gate of the first MOS transistor, the second end of the eighth resistor and the second end of the ninth resistor are connected to the negative end, the source of the first MOS transistor is connected to the first end of the ninth resistor, and the drain of the first MOS transistor is connected to the input end of the signal transceiver unit; The connection end between the second end of the sixth resistor and the first end of the seventh resistor is the input end of the oscillation signal processing circuit, and the drain of the first MOS transistor is the output end of the oscillation signal processing circuit.

7. The detection device according to claim 1, characterized in that: The frequency selection unit includes at least two groups of fourth LC oscillation circuits and electromagnets.

8. The detection device according to claim 1, characterized in that: Also includes: At least one frequency-selective channel; One end of each of the frequency selection channels is connected to one end of the signal receiving circuit, and the other end of the frequency selection channel is connected to the frequency selection control port of the control unit.

9. The detection device according to claim 8, characterized in that: The frequency selection channel includes an adjustment capacitor, one end of the adjustment capacitor is connected to one end of the signal receiving circuit, and the other end of the adjustment capacitor is connected to the frequency selection control port of the control unit.

10. The detection device according to claim 8, characterized in that: The frequency selection control port of the control unit is arranged corresponding to the at least one frequency selection channel.

11. The detection device according to claim 1, characterized in that: It also includes: at least one receiving signal processing circuit, the input end of the receiving signal processing circuit is connected to the output end of the signal transceiver unit, and the output end of the receiving signal processing circuit is connected to the control unit.

12. The detection device according to claim 11, characterized in that: The receiving signal processing circuit includes: a bias circuit, an amplifying circuit and a comparing circuit; The input end of the bias circuit is connected to the output end of the signal transceiver unit as the input end of the received signal processing circuit, the output end of the bias circuit is connected to the input end of the amplifier circuit, the output end of the amplifier circuit is connected to the input end of the comparison circuit, and the output end of the comparison circuit is connected to the control unit as the output end of the received signal processing circuit.

13. The detection device according to claim 12, characterized in that: The bias circuit comprises: a tenth resistor, an eleventh resistor, a twelfth resistor, a fourth capacitor and a first transistor; The first end of the tenth resistor is connected to the output end of the signal transceiver unit, the second end of the tenth resistor is connected to the first end of the fourth capacitor, the second end of the fourth capacitor is connected to the base of the first transistor and the second end of the twelfth resistor, the first end of the twelfth resistor and the first end of the eleventh resistor are connected to a power supply, and the second end of the eleventh resistor is connected to the collector of the first transistor; the collector of the first transistor is also connected to the input end of the amplifier circuit, and the emitter of the first transistor is connected to the negative terminal; The first end of the tenth resistor is the input end of the bias circuit, and the collector of the first transistor is the output end of the bias circuit.

14. The detection device according to claim 12, characterized in that: The amplifying circuit comprises: an amplifier, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor and a fifth capacitor; The positive input terminal of the amplifier is connected to the output terminal of the bias circuit, the negative input terminal of the amplifier is connected to the negative terminal through the thirteenth resistor, the first end of the fourteenth resistor is connected to the negative input terminal of the amplifier, the second end of the fourteenth resistor is connected to the first end of the fifth capacitor and the output terminal of the amplifier, the second end of the fifth capacitor is connected to the negative terminal, the output terminal of the amplifier is connected to the first end of the fifteenth resistor, and the second end of the fifteenth resistor is connected to the input terminal of the comparison circuit; The positive input terminal of the amplifier is the input terminal of the amplifier circuit, and the second terminal of the fifteenth resistor is the output terminal of the amplifier circuit.

15. The detection device according to claim 12, characterized in that: The comparison circuit comprises: a comparator, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor and a sixth capacitor; The positive input terminal of the comparator is connected to the output terminal of the amplifier circuit, the negative input terminal of the comparator is connected to the first terminal of the sixteenth resistor and the first terminal of the seventeenth resistor, the second terminal of the sixteenth resistor is connected to the negative terminal, the second terminal of the seventeenth resistor and the ground terminal of the comparator are connected to the negative terminal, the output terminal of the comparator is connected to the first terminal of the eighteenth resistor, the second terminal of the eighteenth resistor is connected to the first terminal of the sixth capacitor, the second terminal of the eighteenth resistor is also connected to the control unit, and the second terminal of the sixth capacitor is connected to the negative terminal; The positive input terminal of the comparator is the input terminal of the comparison circuit, and the second terminal of the eighteenth resistor is the output terminal of the comparison circuit.

16. A stirring device, characterized in that: A detection device comprising any one of claims 1-15.

17. The stirring device according to claim 16, characterized in that Also includes: A base, a stirring body and a cover body covered on the stirring body; the detection device includes an oscillation signal generating unit, a signal transceiver unit and a control unit arranged on the base, and also includes a frequency selection unit arranged on the stirring body and the cover body; The oscillation signal generating unit is used to generate an oscillation signal, the signal transceiver unit is connected to the oscillation signal generating unit, receives the oscillation signal and forwards the oscillation signal to the frequency selection unit, the frequency selection unit receives the oscillation signal and outputs a frequency selection signal to the signal transceiver unit according to the frequency selection signal, so as to be sent to the control unit through the signal transceiver unit, and the control unit outputs an identification signal according to the frequency selection signal.

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