Power transmission signal debugging circuit and correction device

Abstract

The utility model discloses a power supply transmission signal debugging circuit and correction device, including power supply module, electrical property detection module, control module and carrier coding module, in the first working state, the first power supply module outputs the first power supply voltage to the power supply output end, and in the second working state, the control module outputs the second power supply voltage to the power supply output end. The first power supply module outputs first power supply voltage to the power supply output end, the second power supply module outputs second power supply voltage to the power supply output end, the first power supply voltage is higher than the second power supply voltage, the sampling end of the electrical detection module is connected with the power supply output end to detect actual electrical parameters, and the control module is connected with the electrical detection module to form debugging signals according to the actual electrical parameters. The control module is connected with the power supply module to control the power supply module to be switched to a first working state or a second working state, the output end of the carrier coding module is connected with the power supply input end, and the control module is connected with the carrier coding module to superpose a debugging signal into a second power supply voltage through the carrier coding module. The correction rate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical appliance quality inspection equipment, in particular to a power transmission signal debugging circuit and a correction device. Background Art

[0002] In the production process of electrical appliances, such as induction cookers, it is necessary to debug the electrical parameters of the induction cooker, such as the working power of the induction cooker. Specifically, the debugging of the working power of the induction cooker is used as an example. Figure 2 As shown, a conventional induction cooker driving circuit usually includes a controller, an electromagnetic coil, a power driving component and a switch driving component. The power input terminal of the induction cooker is connected to the power supply, the power driving component modulates the output voltage of the power supply, the switch driving component is connected to the electromagnetic coil to form an electromagnetic driving branch, the output terminal of the power driving component is connected to the electromagnetic driving branch to power the electromagnetic coil, and the controller controls the on and off operation of the switch driving component according to the user's control instructions, thereby adjusting the working power of the induction cooker. For example, the user sets the target working power to 2000W through the operation panel, and the controller controls the working power of the induction cooker to 2000W according to the control instructions for setting the target working power.

[0003] However, due to errors in various components such as resistors and capacitors during the production process, and errors in various amplifiers of the single-chip microcomputer in the controller, there is an error between the actual working power of the induction cooker and the target working power. Therefore, quality inspectors need to adjust and correct the working power error of the induction cooker before it leaves the factory. The specific correction process is that the quality inspectors first input the target working power, for example 2000W, and the controller controls the operation of the induction cooker according to the control instructions of the set target working power. The quality inspectors use the power meter to test the induction cooker. If the actual working power is only 1900W, the quality inspectors adjust the control instructions of the controller, such as increasing the on-off frequency of the switch drive component, so as to increase the actual working power to 2000W to match the user's target working power.

[0004] However, in the past, quality inspectors were required to perform manual debugging and to modify the components of the induction cooker itself, etc. The quality inspection and maintenance efficiency was low, which affected the product's delivery rate. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a power transmission signal debugging circuit and a correction device, which can automatically debug, reduce the workload of quality inspectors, and improve the correction rate.

[0006] According to a first aspect of the present invention, a power transmission signal debugging circuit includes: a power supply module, which is provided with a power supply output terminal, and the power supply output terminal is used to connect to the power input terminal of an electrical appliance, the power supply module includes a first power supply module and a second power supply module, and the power supply module has at least a first working state and a second working state, in the first working state, the first power supply module outputs a first power supply voltage to the power supply output terminal, and in the second working state, the second power supply module outputs a second power supply voltage to the power supply output terminal, wherein the first supply voltage is higher than the second supply voltage; an electrical property detection module, wherein a sampling end of the electrical property detection module is connected to the power supply output terminal to detect actual electrical parameters; a control module, which is connected to the electrical property detection module to form a debugging signal according to the actual electrical parameters, and the control module is connected to the power supply module to control the power supply module to switch to the first working state or the second working state; a carrier encoding module, wherein the output end of the carrier encoding module is connected to the power input terminal, and the control module is connected to the carrier encoding module to superimpose the debugging signal on the second supply voltage through the carrier encoding module.

[0007] A power transmission signal debugging circuit according to an embodiment of the utility model has at least the following beneficial effects:

[0008] The utility model discloses a power transmission signal debugging circuit. When debugging electrical parameters of an electrical appliance, the power supply output terminal is connected to the power supply input terminal of the electrical appliance, the control module controls the power supply module to switch to the first working state, the first power supply module provides the electrical appliance with a first power supply voltage suitable for operation, the quality inspector can set the same target electrical parameters on the electrical appliance and the control module, the electrical appliance forms a control instruction inside to drive the electrical appliance to operate, the electrical detection module detects the actual electrical parameters of the electrical appliance, when there is a deviation between the actual electrical parameters and the target electrical parameters, the control module forms a debugging signal according to the deviation, the control module controls the power supply module to switch to the second working state, so that the voltage level output to the electrical appliance is reduced to the second power supply voltage, and the control module superimposes the debugging signal on the second power supply voltage through the carrier coding module, the second power supply voltage enters through the power supply input terminal of the electrical appliance, the controller inside the electrical appliance can decode the second power supply voltage, thereby obtaining the debugging signal, and modifying the control instruction, so that the actual electrical parameters are adjusted to the target electrical parameters, the above process can be completed automatically, reducing the workload of the quality inspectors and improving the correction rate.

[0009] According to some embodiments of the utility model, the electrical detection module includes a power detection module, and the power detection module includes a current sampling module, a voltage sampling module and a power calculation module. The current sampling module is connected to the power supply output end to detect the actual working current, and the voltage sampling module is connected to the power supply output end to detect the actual working voltage. The input end of the power calculation module is respectively connected to the current sampling module and the voltage sampling module to calculate the actual working power based on the actual working current and the actual working current, and the output end of the power calculation module is connected to the control module to output the actual working power to the control module.

[0010] According to some embodiments of the utility model, the current sampling module includes a bridge circuit, a current transformer arranged on the bridge circuit, a first rectifier unit and a first voltage divider unit, the head end of the bridge circuit is connected to the power supply output end, the tail end of the bridge circuit is used to connect to the power input end of the electrical appliance, the input end of the first rectifier unit is connected to the current transformer, the output end of the first rectifier unit is connected to the input end of the first voltage divider unit, and the voltage divider end of the first voltage divider unit is connected to the input end of the power calculation module.

[0011] According to some embodiments of the present utility model, the voltage sampling module includes a second rectifier unit and a second voltage divider unit, the input end of the second rectifier unit is connected to the bridge circuit, the output end of the second rectifier unit is connected to the input end of the second voltage divider unit, and the output end of the second voltage divider unit is connected.

[0012] According to some embodiments of the present utility model, the carrier encoding module includes a switch encoding unit and a diode D87, the cathode of the diode D87 is connected to the power supply output end, the anode of the diode D87 is respectively connected to the input end of the switch encoding unit and the power input end of the electrical appliance, the output end of the switch encoding unit is grounded, and the control module is connected to the controlled end of the switch encoding unit to control the on and off of the switch encoding unit.

[0013] According to some embodiments of the present invention, the carrier encoding module further includes a push-pull unit, the control module is connected to a controlled end of the push-pull unit, and an output end of the push-pull unit is connected to a controlled end of the switch encoding unit.

[0014] According to some embodiments of the present invention, the carrier encoding module further includes an optocoupler isolator, the control module is connected to the light emitter of the optocoupler isolator, and the light receiver of the optocoupler isolator is connected to the controlled end of the push-pull unit.

[0015] According to some embodiments of the present utility model, the first power supply module includes a first relay unit and a first switch unit, the first relay unit includes a first relay switch and a first relay coil, the head end of the first relay switch is used to connect to the first power supply, the tail end of the first relay switch is used to connect to the power input end of the electrical appliance, the first power supply outputs a first supply voltage, the first relay coil and the first switch unit are connected to form at least part of a first drive series circuit, the first drive series circuit is used to access the power supply, and the control module is connected to the controlled end of the first switch unit to control the on and off of the first switch unit.

[0016] According to some embodiments of the present utility model, the second power supply module includes a second relay unit and a second switch unit, the second relay unit includes a second relay switch and a second relay coil, the head end of the second relay switch is used to connect to the second power supply, the tail end of the second relay switch is used to connect to the power input end of the electrical appliance, the output end of the carrier encoding module is connected to the tail end of the second relay switch, the second power supply outputs a second supply voltage, the second relay coil and the second switch unit are connected to form at least part of a second drive series circuit, the second drive series circuit is used to access the power supply, and the control module is connected to the controlled end of the second switch unit to control the on and off of the second switch unit.

[0017] The correction device according to the second aspect of the embodiment of the utility model includes the power transmission signal debugging circuit disclosed in any one of the above embodiments.

[0018] The calibration device according to the embodiment of the utility model has at least the following beneficial effects:

[0019] The utility model correction device uses a power transmission signal debugging circuit to correct the electrical parameters of the electrical appliance, automatically debugs, reduces the workload of quality inspection personnel, and improves the correction rate.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 This is a principle structure block diagram of one embodiment of the power transmission signal debugging circuit of the utility model;

[0023] Figure 2 This is a schematic diagram of the internal circuit of the induction cooker;

[0024] Figure 3 A circuit diagram of a current sampling module and a voltage sampling module of one embodiment of the power transmission signal debugging circuit of the utility model;

[0025] Figure 4 A circuit diagram of a power calculation module of one embodiment of the power transmission signal debugging circuit of the utility model;

[0026] Figure 5 A circuit diagram of a control module of one embodiment of the power transmission signal debugging circuit of the utility model;

[0027] Figure 6 A circuit diagram of a carrier coding module of one embodiment of the power transmission signal debugging circuit of the utility model;

[0028] Figure 7 A circuit diagram of a second power supply module of one embodiment of the power transmission signal debugging circuit of the utility model;

[0029] Figure 8 The figure is a circuit diagram of a first power supply module of one embodiment of the power transmission signal debugging circuit of the utility model.

[0030] Reference numerals:

[0031] The power supply module 100; the first power supply module 110; the first relay unit 111; the first switch unit 112; the second power supply module 120; the second relay unit 121; the second switch unit 122; the power supply output terminal 130; the electrical property detection module 200; the current sampling module 210; the bridge circuit 211; the current transformer 212; the first rectifier unit 213; the first voltage divider unit 214; the voltage sampling module 220; the second rectifier unit 221; the second voltage divider unit 222; the power calculation module 230; the control module 300; the carrier encoding module 400; the switch encoding unit 410; the optical coupler isolator 420; the push-pull unit 430; the power conversion module 500; the controller 610; the electromagnetic coil 620; the power drive component 630; the switch drive component 640. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientations or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside", etc., are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] like Figure 1-8As shown, a power transmission signal debugging circuit according to an embodiment of the first aspect of the utility model includes a power supply module 100, an electrical property detection module 200, a control module 300 and a carrier encoding module 400, the power supply module 100 is provided with a power supply output terminal 130, the power supply output terminal 130 is used to connect to the power input terminal of the electrical appliance, the power supply module 100 includes a first power supply module 110 and a second power supply module 120, the power supply module 100 has at least a first working state and a second working state, in the first working state, the first power supply module 110 outputs a first supply voltage to the power supply output terminal 130, in the second working state, the second power supply module 120 is a power supply output terminal 130 outputs a second power supply voltage, wherein the first power supply voltage is higher than the second power supply voltage, the sampling end of the electrical detection module 200 is connected to the power supply output end 130 to detect actual electrical parameters, the control module 300 is connected to the electrical detection module 200 to form a debugging signal according to the actual electrical parameters, the control module 300 is connected to the power supply module 100 to control the power supply module 100 to switch to a first working state or a second working state, the output end of the carrier encoding module 400 is connected to the power input end, and the control module 300 is connected to the carrier encoding module 400 to superimpose the debugging signal on the second power supply voltage through the carrier encoding module 400.

[0037] The power transmission signal debugging circuit of the present application can be used to calibrate the electrical parameters of an induction cooker, and can also be used to calibrate the electrical parameters of other household appliances such as rice cookers and refrigerators. The power calibration of an induction cooker is taken as an example. Figure 2 As shown, the induction cookers currently on the market generally include a controller 610, an electromagnetic coil 620, a power drive component 630 and a switch drive component 640. The power input end of the induction cooker is connected to the power supply, the power drive component 630 modulates the output voltage of the power supply, the switch drive component 640 is connected to the electromagnetic coil 620 to form an electromagnetic drive branch, the output end of the power drive component 630 is connected to the electromagnetic drive branch to supply power to the electromagnetic coil 620, and the controller 610 controls the on and off operation of the switch drive component 640 according to the user's control instructions.

[0038] The controller 610 can be composed of a CPU or MCU and its associated circuits, and the switch drive component 640 can be composed of multiple semiconductor switch tubes. The controller 610 forms a control instruction according to the user's control action. The control instruction can be an instruction for controlling the switching frequency of the switch drive component 640. For different induction cookers, due to errors in component parameters, the actual working power generated by the same switching frequency instruction driving the electromagnetic coil 620 is different. Therefore, power correction is required for each induction cooker. For example, when the actual working power of the induction cooker is lower than the target working power, the corresponding switching frequency needs to be slightly increased under the target working power, so that the actual working power is increased to the target working power.

[0039] It is understandable that the power input end of a conventional induction cooker is also connected to the controller 610 to power the controller 610. At the same time, the controller 610 can also parse out the carrier signal in the power supply voltage and analyze it to obtain a debugging signal. The controller 610 then performs power correction based on the debugging signal.

[0040] In some embodiments of the present invention, Figure 5 As shown, the control module 300 can be composed of a CPU or MCU and its auxiliary circuits. During the calibration process, the control module 300 can also be connected to the data serial port of the controller 610 via a data line. The control module 300 can preset multiple target working powers, and then output control instructions to the controller 610 to perform synchronous operation according to the same target working power, and then perform power calibration. This is equivalent to achieving automatic calibration without the need for quality inspectors to set the target working power. The quality inspectors only need to connect the power output terminal 130 to the power input terminal of the induction cooker.

[0041] The utility model induction cooker power transmission signal debugging circuit, when calibrating the electrical parameters of the induction cooker, connects the power supply output terminal 130 to the power input terminal of the induction cooker, the control module 300 controls the power supply module 100 to switch to the first working state, the first power supply module 110 provides the induction cooker with a first power supply voltage suitable for operation, the quality inspector can set the same target electrical parameters on the induction cooker and the control module 300, the control command is formed inside the induction cooker to drive the induction cooker to operate, the electrical detection module 200 detects the actual electrical parameters of the induction cooker, when there is a deviation between the actual electrical parameters and the target electrical parameters, the control module 300 A debugging signal is formed based on the deviation, and the control module 300 controls the power supply module 100 to switch to the second working state, so that the voltage level output to the induction cooker is reduced to the second power supply voltage, and the control module 300 superimposes the debugging signal on the second power supply voltage through the carrier encoding module 400, and the second power supply voltage enters through the power input terminal of the induction cooker. The controller 610 inside the induction cooker can decode the second power supply voltage to obtain the debugging signal and modify the control instruction so that the actual electrical parameters are adjusted to the target electrical parameters. The above process can be completed automatically, reducing the workload of quality inspectors and improving the correction rate.

[0042] It should be noted that the first supply voltage can be 220V AC, which is equivalent to the conventional AC voltage for powering the induction cooker, and the second supply voltage can be 80V AC. Reducing the amplitude of the second supply voltage used for the carrier can be more conducive to the induction cooker controller 610 to parse the debugging signal.

[0043] In some embodiments of the present invention, Figure 1 , 3 As shown in Figure 4, the electrical detection module 200 may include a power detection module, which includes a current sampling module 210, a voltage sampling module 220 and a power calculation module 230. The current sampling module 210 is connected to the power supply output terminal 130 to detect the actual working current, the voltage sampling module 220 is connected to the power supply output terminal 130 to detect the actual working voltage, the input end of the power calculation module 230 is respectively connected to the current sampling module 210 and the voltage sampling module 220 to calculate the actual working power according to the actual working current and the actual working current, and the output end of the power calculation module 230 is connected to the control module 300 to output the actual working power to the control module 300.

[0044] The current sampling module 210 detects the actual working current, the voltage sampling module 220 detects the actual working voltage, and the power calculation module 230 can be a conventional power metering chip. After obtaining the working current and the working voltage, the power calculation module 230 can calculate the actual working power, and then output the actual working power to the control module 300. In this step, the control module 300 does not need to perform calculations, but directly provides the processed actual working power to the control module 300, thereby reducing the processing load of the control module 300, reasonably allocating the processing flow, and improving the processing efficiency.

[0045] In some embodiments of the present invention, Figure 3 As shown, the current sampling module 210 includes a bridge circuit 211, a current transformer 212 arranged on the bridge circuit 211, a first rectifier unit 213 and a first voltage divider unit 214, the head end of the bridge circuit 211 is connected to the power supply output end 130, the tail end of the bridge circuit 211 is used to connect to the power input end of the induction cooker, the input end of the first rectifier unit 213 is connected to the current transformer 212, the output end of the first rectifier unit 213 is connected to the input end of the first voltage divider unit 214, and the voltage divider end of the first voltage divider unit 214 is connected to the input end of the power calculation module 230.

[0046] The bridge line 211 may include an L-phase busbar and an N-phase busbar, which are used to respectively connect to the power output terminal 130 and the power input terminal of the induction cooker. The AC power output from the power input terminal can be output to the induction cooker through the bridge line 211.

[0047] The current transformer 212 can be coupled with the L-phase bus or the N-phase bus to induce the working current. The first rectifier unit 213 can be a rectifier bridge composed of a diode D65, a diode D66, a diode D67, and a diode D68. The first voltage divider unit 214 can be composed of a resistor R68, a resistor R610, a resistor R610, and a resistor R611. The detected working current forms a terminal voltage that can reflect the size of the working current between the connection point of the resistor R610 and the resistor R611. The power calculation module 230 can analyze the size of the working current based on the size of the terminal voltage.

[0048] In some embodiments of the present invention, Figure 3 As shown, the voltage sampling module 220 includes a second rectifier unit 221 and a second voltage divider unit 222, the input end of the second rectifier unit 221 is connected to the bridge circuit 211, the output end of the second rectifier unit 221 is connected to the input end of the second voltage divider unit 222, and the output end of the second voltage divider unit 222 is connected.

[0049] The input end of the second rectifier unit 221 can be connected to the L-phase bus and the N-phase bus respectively, so as to detect the input voltage. The second rectifier unit 221 can be a rectifier bridge composed of a diode D61, a diode D62, a diode D63, and a diode D64. The second voltage divider unit 222 can be composed of a resistor R62, a resistor R63, a resistor R64, and a resistor R65. The actual working voltage forms a terminal voltage that can reflect the size of the working current between the connection point of the resistor R62 and the resistor R63 or between the connection point of the resistor R64 and the resistor R65. The power calculation module 230 can analyze the size of the working voltage according to the size of the terminal voltage.

[0050] In some embodiments of the present invention, a power conversion module 500 is also included. Figure 3 As shown, the power conversion module 500 includes a step-down chip and a transformer. The input end of the step-down chip is connected to the output end of the second rectifier unit 221. The step-down chip can reduce the voltage to 12V, 5V, 3.3V and other voltage levels suitable for powering low-voltage components as a power supply. The transformer can further transform the voltage output by the step-down chip and can also be used as a power supply.

[0051] In some embodiments of the present invention, Figure 6 As shown, the carrier encoding module 400 includes a switch encoding unit 410 and a diode D87, the cathode of the diode D87 is connected to the power supply output terminal 130, the anode of the diode D87 is respectively connected to the input terminal of the switch encoding unit 410 and the power input terminal of the induction cooker, the output terminal of the switch encoding unit 410 is grounded, and the control module 300 is connected to the controlled end of the switch encoding unit 410 to control the on and off of the switch encoding unit 410.

[0052] Among them, the switch coding unit 410 can include a semiconductor switch tube Q86, which can be a triode or a MOS tube, etc. The diode D87 plays a unidirectional cutoff role. The control module 300 controls the switch coding unit 410 to be turned on, which can lower the level of the second power supply voltage. When the switch coding unit 410 is turned on and off, the code representing the debugging signal can be superimposed on the second power supply voltage.

[0053] In some embodiments of the present invention, Figure 6 As shown, the carrier encoding module 400 also includes a push-pull unit 430, the control module 300 is connected to the controlled end of the push-pull unit 430, and the output end of the push-pull unit 430 is connected to the controlled end of the switch encoding unit 410. The push-pull unit 430 can improve the driving force of the switch encoding unit 410 and improve the accuracy of signal superposition.

[0054] Specifically, the push-pull unit 430 may include a semiconductor switch tube Q87 and a semiconductor switch tube Q88, the switch tube Q87 and the switch tube Q88 have opposite polarities, the input end of the switch tube Q87 is connected to the power supply, the output end of the switch tube Q87 is respectively connected to the input end of the switch tube Q88 and the controlled end of the switch encoding unit 410, the output end of the switch tube Q88 is grounded, the controlled end of the switch tube Q87 is connected to the controlled end of the switch tube Q88 and is controlled on and off by the signal output by the control module 300.

[0055] In some embodiments of the present invention, the carrier encoding module 400 further includes an optocoupler isolator 420 , the control module 300 is connected to the light emitter of the optocoupler isolator 420 , and the light receiver of the optocoupler isolator 420 is connected to the controlled end of the push-pull unit 430 .

[0056] The optical coupler isolator 420 can shield signals from entering the control module 300 , thereby preventing external signals from interfering with the control module 300 .

[0057] In some embodiments of the present invention, Figure 8 As shown, the first power supply module 110 includes a first relay unit 111 and a first switch unit 112, the first relay unit 111 includes a first relay switch and a first relay coil, the head end of the first relay switch is used to connect to the first power supply, the tail end of the first relay switch is used to connect to the power input end of the induction cooker, the first power supply outputs a first power supply voltage, the first relay coil and the first switch unit 112 are connected to form at least part of a first drive series circuit, the first drive series circuit is used to access the power supply, and the control module 300 is connected to the controlled end of the first switch unit 112 to control the on and off of the first switch unit 112.

[0058] In some embodiments of the present invention, Figure 7 As shown, the second power supply module 120 includes a second relay unit 121 and a second switch unit 122, the second relay unit 121 includes a second relay switch and a second relay coil, the head end of the second relay switch is used to connect to the second power supply, the tail end of the second relay switch is used to connect to the power input end of the induction cooker, the output end of the carrier encoding module 400 is connected to the tail end of the second relay switch, the second power supply outputs a second power supply voltage, the second relay coil and the second switch unit 122 are connected to form at least part of a second drive series circuit, the second drive series circuit is used to access the power supply, and the control module 300 is connected to the controlled end of the second switch unit 122 to control the on and off of the second switch unit 122.

[0059] Among them, both the first relay switch and the second relay switch can be movable conductive springs. The first relay coil can be energized to attract the first relay switch, and the second relay coil can be energized to attract the second relay switch. When the first relay coil is de-energized, the first relay switch is disconnected, and when the second relay coil is de-energized, the second relay switch is disconnected. The first switch unit 112 can be a semiconductor switch tube Q94, and the second switch unit 122 can be a semiconductor switch tube Q91. The control module 300 controls the on and off of the first switch unit 112 and the second switch unit 122 respectively. When the first switch unit 112 is closed and the second switch unit 122 is disconnected, the first relay coil is energized to attract the first relay switch, and the power supply output end 130 outputs the first supply voltage. When the second switch unit 122 is closed and the first switch unit 112 is disconnected, the second relay coil is energized to attract the second relay switch, and the power supply output end 130 outputs the second supply voltage.

[0060] The correction device according to the second aspect of the embodiment of the utility model includes the power transmission signal debugging circuit disclosed in any one of the above embodiments.

[0061] The calibration device can calibrate the electrical parameters of various electrical appliances, such as induction cookers, rice cookers, etc.

[0062] The utility model correction device uses a power transmission signal debugging circuit to correct the electrical parameters of the electrical appliance, automatically debugs, reduces the workload of quality inspection personnel, and improves the correction rate.

[0063] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A power transmission signal debugging circuit, characterized in that: include: A power supply module is provided with a power supply output terminal, the power supply output terminal is used to connect to the power input terminal of the electrical appliance, the power supply module includes a first power supply module and a second power supply module, the power supply module has at least a first working state and a second working state, in the first working state, the first power supply module outputs a first power supply voltage to the power supply output terminal, in the second working state, the second power supply module outputs a second power supply voltage to the power supply output terminal, wherein the first power supply voltage is higher than the second power supply voltage; An electrical detection module, wherein a sampling end of the electrical detection module is connected to the power supply output end to detect actual electrical parameters; A control module connected to the electrical detection module to form a debugging signal according to actual electrical parameters, and the control module is connected to the power supply module to control the power supply module to switch to a first working state or a second working state; A carrier encoding module, wherein the output end of the carrier encoding module is connected to the power input end, and the control module is connected to the carrier encoding module to superimpose the debugging signal on the second power supply voltage through the carrier encoding module.

2. A power transmission signal debugging circuit according to claim 1, characterized in that: The electrical detection module includes a power detection module, and the power detection module includes a current sampling module, a voltage sampling module and a power calculation module. The current sampling module is connected to the power supply output end to detect the actual working current, and the voltage sampling module is connected to the power supply output end to detect the actual working voltage. The input end of the power calculation module is respectively connected to the current sampling module and the voltage sampling module to calculate the actual working power according to the actual working current and the actual working current, and the output end of the power calculation module is connected to the control module to output the actual working power to the control module.

3. A power transmission signal debugging circuit according to claim 2, characterized in that: The current sampling module includes a bridge circuit, a current transformer arranged on the bridge circuit, a first rectifier unit and a first voltage divider unit. The head end of the bridge circuit is connected to the power supply output end, and the tail end of the bridge circuit is used to connect to the power input end of the electrical appliance. The input end of the first rectifier unit is connected to the current transformer, the output end of the first rectifier unit is connected to the input end of the first voltage divider unit, and the voltage divider end of the first voltage divider unit is connected to the input end of the power calculation module.

4. The power transmission signal debugging circuit according to claim 3, characterized in that: The voltage sampling module includes a second rectifier unit and a second voltage divider unit, the input end of the second rectifier unit is connected to the bridge circuit, the output end of the second rectifier unit is connected to the input end of the second voltage divider unit, and the output end of the second voltage divider unit is connected.

5. A power transmission signal debugging circuit according to claim 2, characterized in that: The carrier encoding module includes a switch encoding unit and a diode D87, the cathode of the diode D87 is connected to the power supply output end, the anode of the diode D87 is respectively connected to the input end of the switch encoding unit and the power input end of the electrical appliance, the output end of the switch encoding unit is grounded, and the control module is connected to the controlled end of the switch encoding unit to control the on and off of the switch encoding unit.

6. A power transmission signal debugging circuit according to claim 5, characterized in that: The carrier encoding module further includes a push-pull unit, the control module is connected to a controlled end of the push-pull unit, and an output end of the push-pull unit is connected to a controlled end of the switch encoding unit.

7. A power transmission signal debugging circuit according to claim 6, characterized in that: The carrier encoding module also includes an optocoupler isolator, the control module is connected to the light emitter of the optocoupler isolator, and the light receiver of the optocoupler isolator is connected to the controlled end of the push-pull unit.

8. A power transmission signal debugging circuit according to claim 2, characterized in that: The first power supply module includes a first relay unit and a first switch unit, the first relay unit includes a first relay switch and a first relay coil, the head end of the first relay switch is used to connect to a first power supply, the tail end of the first relay switch is used to connect to a power input end of an electrical appliance, the first power supply outputs a first power supply voltage, the first relay coil and the first switch unit are connected to form at least part of a first drive series circuit, the first drive series circuit is used to access a power supply, and the control module is connected to a controlled end of the first switch unit to control the on and off of the first switch unit.

9. A power transmission signal debugging circuit according to claim 2, characterized in that: The second power supply module includes a second relay unit and a second switch unit, the second relay unit includes a second relay switch and a second relay coil, the head end of the second relay switch is used to be connected to the second power supply, the tail end of the second relay switch is used to be connected to the power input end of the electrical appliance, the output end of the carrier encoding module is connected to the tail end of the second relay switch, the second power supply outputs a second power supply voltage, the second relay coil and the second switch unit are connected to form at least part of a second drive series circuit, the second drive series circuit is used to access the power supply, and the control module is connected to the controlled end of the second switch unit to control the on and off of the second switch unit.

10. A calibration device, characterized in that: It comprises a power transmission signal debugging circuit as described in any one of claims 1-9.

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