[0044] Example 1
[0045] figure 1 A schematic diagram of the structure of a vertical object self-balancing system is shown, such as figure 1 As shown, this embodiment provides a vertical object self-balancing system, including:
[0046] a plurality of strain measuring elements 110, arranged at a plurality of positions on the bottom surface of the vertical object;
[0047] The plurality of detection circuits 120 correspond to the plurality of strain measurement elements one-to-one, and each detection circuit is connected to both ends of the corresponding strain measurement element for detecting the voltage value of the strain measurement element;
[0048] The lifting device 130 is arranged on the bottom surface of the vertical object and is used to adjust the vertical object to a balanced state;
[0049] The control device 140 is connected to the plurality of detection circuits 1200 and the lifting device 130, and is used to obtain the voltage values detected by the plurality of detection circuits and adjust the lifting device when the voltage values are inconsistent, so as to bring the vertical object to a balanced state.
[0050] In some embodiments, the strain measurement elements comprise electrical strain gauges. The vertical object includes one of an air conditioner outdoor unit, a refrigerator, a washing machine, an electric water heater, and a floor fan.
[0051]In this embodiment, by disposing strain measuring elements at multiple positions on the bottom surface of the vertical object, the pressure change on the bottom surface of the vertical object will change the resistance value of the strain measuring element, and the detection circuit corresponding to the strain measuring element detects the strain measuring element. The voltage value at both ends, so that the lifting device is adjusted when the voltage values detected by each detection circuit are inconsistent, so that the vertical object is in a balanced state, and the self-balancing of the vertical object is realized, which solves the problem of measuring the balance state of the vertical object with the naked eye. question.
[0052] figure 2 A schematic diagram of the circuit structure of a vertical object self-balancing system is shown, such as figure 2 As shown, there are four resistance strain gauges, including a first resistance strain gauge R1, a second resistance strain gauge R2, a third resistance strain gauge R3 and a fourth resistance strain gauge R4; the placement positions of the four resistance strain gauges include vertical resistance strain gauges. A suitable position on the bottom surface of a vertical object, such as the ground frame of a vertical object.
[0053] The first resistance strain gauge R1 is connected in series with the second resistance strain gauge R2, the third resistance strain gauge R3 is connected in series with the fourth resistance strain gauge R4, and the two series branches are connected in parallel to form a Wheatstone bridge. As a sensitive resistor of the Wheatstone bridge species.
[0054] In some cases, a resistor R is also connected to the input end of the above-mentioned Wheatstone bridge to achieve impedance matching.
[0055] In some embodiments, the vertical object self-balancing system further includes:
[0056] The indicator light, one end is connected to the connection line of the first resistance strain gauge R1 and the second resistance strain gauge R2, and the other end is connected to the connection line of the third resistance strain gauge R3 and the fourth resistance strain gauge R4, used to indicate the vertical type Whether the object is in equilibrium. In practical applications, the indicator light can be an LED indicator light. Specifically, a single-color indicator light can be connected in series between the two parallel series branches. When the vertical object is in a balanced state, no current flows through the indicator light, and the indicator light is off; when the vertical object is not in a balanced state, the indicator light is There is current flowing through the lamp and the indicator light is on.
[0057] In some embodiments, the detection circuit 120 includes, for example, figure 2 The differential amplifier circuit shown, detects the voltage across each resistance strain gauge. Taking the differential amplifier circuit connected to the first resistance strain gauge R1 as an example, it includes an amplifier U1, the forward input end of the amplifier U1 is connected to one end of the first resistance strain gauge R1 through the resistor R5, and the reverse input end of the amplifier U1 is connected through the resistor R5. The resistor R8 is connected to the other end of the first resistance strain gauge R1, one end of the resistor R6 is connected to the connection line between the positive input end of the amplifier U1 and the resistor R5, the other end of the resistor R6 is grounded, and the output end of the amplifier U1 is connected to the control device 140 One end of the resistor R7 is connected to the connection line between the output end of the amplifier U1 and the control device 140, and the other end of the resistor R7 is connected to the connection line between the inverting input end of the amplifier U1 and the resistor R8, and the value of each resistor is determined according to the actual application. The principles of the other three differential amplifying circuits are the same as those of the differential amplifying circuit connected to the first resistance strain gauge R1, and are not repeated in this embodiment. The four detection circuits respectively detect the voltage values corresponding to the resistance strain gauges, and output the detected voltages to the control device 140 to determine whether the four voltage values are consistent.
[0058] It should be understood that the judging rule for whether the four voltage values are consistent may be that the four voltage values are within the preset error tolerance range. If the error is within the preset range, it is considered to be consistent, otherwise it is considered inconsistent. . In the process that the vertical object does not reach the equilibrium state, the control device 140 compares and processes the four voltages in real time, until all the voltages are within an allowable error range, then it is considered that the self-balancing of the vertical object is achieved, wherein the error allows The range can be determined according to its own work requirements (balance requirements). When the balance requirements are high, the allowable range of the error is small, and when the balance requirements are low, the allowable error range is large. For example, the allowable range of error for vertical objects (such as refrigerators) that do not undergo violent movement inside can be relatively large, and the balance requirements are not too high; vertical objects that experience violent movement inside (such as outdoor units of air conditioners, washing machines), the error The allowable range is smaller, and the balance is required to be higher.
[0059] In some embodiments, the lifting device 130 may include:
[0060] A plurality of spiral bases are respectively arranged at a plurality of positions on the bottom surface of the vertical object;
[0061] A plurality of motors, connected with the corresponding screw bases, are used to adjust the height of the corresponding screw bases;
[0062] The motor drive circuit is connected to the control device 140 and the plurality of motors, and is used to drive at least one motor to adjust the height of the corresponding screw base when the voltage values detected by the plurality of detection circuits are inconsistent, so as to adjust the height of the bottom surface of the vertical object at different positions , to bring the vertical object to a state of equilibrium.
[0063] Taking the aforementioned four resistance strain gauges as an example, the lifting device 130 also has four screw bases and four motors, including M1, M2, M3, and M4. The heights of the four screw bases are adjusted respectively, and the four motors are respectively adjusted. Connect above the corresponding screw base.
[0064] In some implementations, the motor drive circuit drives the motor through TTL level conversion, for example, using an L298N drive circuit.
[0065] In practical applications, a groove can be set at the four corners of the bottom frame of the vertical object, and the four screw bases can be placed in the four grooves of the vertical object respectively, which are used to oppose the four vertical objects. The position is lifted and lowered to make the vertical object reach a state of equilibrium. Specifically, the forward rotation or reverse rotation of the motor is driven by controlling the motor driving circuit, and the rotation of the rotating base is driven, so as to realize the height adjustment of the screw base. In some cases, the adjusting screw base is raised when the motor is rotating forward, and the adjusting screw base is lowered when the motor is rotating reversely.
[0066] In other embodiments, the lifting device includes:
[0067] Self-balancing brackets are arranged on the bottom surface of vertical objects, and screw bases are arranged at different positions of the self-balancing brackets;
[0068] A plurality of motors, connected with the corresponding screw bases, are used to adjust the height of the corresponding screw bases;
[0069] The motor drive circuit is connected with the control device and a plurality of motors, and is used to drive at least one motor to adjust the height of the corresponding screw base when the voltage values detected by the plurality of detection circuits are inconsistent, so as to adjust the height of the self-balancing bracket at different positions, so that the Vertical objects to equilibrium.
[0070] Taking the aforementioned four resistance strain gauges as an example, there are also four screw bases in the lifting device 130, which are installed at four positions of the self-balancing support, such as the four corners of the self-balancing support, and there are also four motors, including M1 , M2, M3, M4, respectively adjust the height of the 4 screw bases, and the 4 motors are respectively connected above the corresponding screw bases to realize the height adjustment of the four positions of the self-balancing bracket.
[0071] In some implementations, the motor drive circuit drives the motor through TTL level conversion, for example, using an L298N drive circuit.
[0072] In practical applications, a groove can be set at the four corners of the bottom frame of the vertical object, and the four screw bases can be placed in the four grooves of the vertical object respectively, which are used to oppose the four vertical objects. The position is lifted and lowered to make the vertical object reach a state of equilibrium. Specifically, the forward rotation or reverse rotation of the motor is driven by controlling the motor drive circuit, so as to realize the height adjustment of the screw base. In some cases, the screw base is adjusted to rise when the motor is rotating forward, and the screw base is adjusted to lower when the motor is reversed. .
[0073] In some embodiments, the control device 140 adjusts the lifting device when the voltage values are inconsistent to bring the vertical object to a balanced state, including:
[0074] When the voltage values are inconsistent, determine the minimum or maximum value of each voltage value and adjust the lifting device to increase or decrease the stress at the position of the strain measuring element corresponding to the minimum or maximum value until the vertical object is at the same voltage value. in equilibrium.
[0075] In one case, when the voltage values are inconsistent, the minimum value is found, and the position corresponding to the minimum pressure is the smallest, that is, the distance between this position and the ground is the largest relative to the other three positions, and should be added Increase the stress at this position so that the stress at each position is consistent, and the vertical object reaches a balanced state. Therefore, the screw base at the corresponding position in the lifting device can be adjusted to rotate toward the ground until the voltage values are consistent.
[0076] In another case, the maximum value is found when the voltage values are inconsistent, and the position corresponding to the maximum value has the highest pressure. The stress at this position should be reduced to make the stress at each position consistent, and the vertical object will reach equilibrium. Therefore, the screw base at the corresponding position in the lifting device can be adjusted to rotate away from the ground, so that the position corresponding to the maximum pressure value is lowered until the voltage values are consistent and the vertical object is in a balanced state.
[0077] It should be understood that when the voltage values are the same, there is no need to adjust the lifting device, and the motor drive circuit does not operate. If the four sets of voltage data are different, it means that at least one corner is in an unbalanced position. The screw base needs to be adjusted to make the object gradually reach the equilibrium state. When the voltage value corresponding to the angle has become a non-minimum value, the control device continues to control the screw base corresponding to other positions to continue the adjustment operation until the final four voltages are at one If the error tolerance is within the allowable range, the vertical object has reached a state of equilibrium and achieves self-balancing.
[0078] The system provided by this embodiment solves the problem of large error in measuring the balance state of the vertical object with the naked eye, so that the vertical object can keep the balance state at all times, reduces the machine loss caused by the unbalance of the vertical object itself, and improves the efficiency of the machine. It has a long service life and effectively solves the problem of vertical objects tilting due to uneven ground. For the floor fan, when the floor is not flat and the floor fan is inclined, it will also cause serious safety hazards. Therefore, the system can also solve the problem of safety hazards caused by the inclination of the floor fan.
