Control system and control circuit for alarming of yarn storage device

Abstract

The utility model discloses a control system and a control circuit for alarming a yarn storage device. The control system comprises a signal receiving module, a signal processing module, a control execution module and a yarn storage device alarming module, the signal receiving module is used for receiving and sending a yarn storage device operation signal; the yarn storage device signal processing module is used for analyzing whether the received yarn storage device operation signal is a yarn storage device alarm condition signal or not, and outputting a corresponding control execution signal and an alarm signal when the received yarn storage device operation signal is the yarn storage device alarm condition signal; the control execution module is used for receiving the control execution signal and correspondingly controlling a yarn storage device motor to run and stop according to the control execution signal; and the yarn storage device alarm module is used for correspondingly giving an alarm according to the yarn storage device alarm signal. The system realizes the function of alarming the abnormal operation state of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of textile machinery, in particular to a control system and a control circuit for alarming a yarn storage device. Background Art

[0002] The yarn storage device is an important component of the knitting machine. The yarn storage device mainly includes a shell and a main shaft and a yarn storage drum installed thereon. The yarn storage drum is sleeved with a yarn pressure ring and a tension ring. The main shaft is at the center of the yarn storage drum. The motor drives the yarn storage drum to rotate to store yarn.

[0003] During the use of the yarn storage device, there will be various situations where the circuit board needs to control the operating status of the motor. For example, when the yarn is stored normally, the control unit controls the normal operation of the motor; when the yarn storage drum is full of yarn, the full yarn stop mechanism will give the circuit board a stop signal, and the circuit board will control the motor to stop at this time; when the yarn break alarm device detects yarn breakage, the control unit controls the motor to stop. However, some faults may occur during the operation of the yarn storage device, causing the operating status of the motor to differ from the preset status. For example, when the yarn storage drum is full of yarn under normal circumstances, the full yarn stop mechanism will control the motor to stop through the circuit board. If the motor continues to rotate at this time, the motor will idle; for example, when the yarn break alarm device detects yarn breakage, the control unit will control the motor to stop. If the motor continues to rotate at this time, the motor will idle; for example, when the yarn cannot pull the yarn storage drum, it means that the motor is blocked. If the motor is blocked for a long time, it will cause damage to the motor. Summary of the invention

[0004] The purpose of the utility model is to provide a control system and a control circuit for a yarn storer alarm, which analyzes whether a received yarn storer operation signal is a yarn storer alarm condition signal, and when the received yarn storer operation signal is a yarn storer alarm condition signal, outputs a corresponding control execution signal and an alarm signal, and uses an alarm to remind the user that the motor of the yarn storer is in an abnormal state.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: a control system for yarn storage device alarm, comprising a signal receiving module, a yarn storage signal processing module, a control execution module and a yarn storage device alarm module;

[0006] The signal receiving module is used to receive the yarn storage device operation signal and send the received yarn storage device operation signal to the yarn storage device signal processing module;

[0007] The yarn storage device signal processing module is used to analyze whether the received yarn storage device operation signal is a yarn storage device alarm condition signal, wherein the yarn storage device alarm condition signal includes a motor operation state abnormality signal; and when the received yarn storage device operation signal is a yarn storage device alarm condition signal, output a corresponding control execution signal and an alarm signal;

[0008] The control execution module is used to receive the control execution signal and control the yarn storage device motor to run and stop according to the control execution signal;

[0009] The yarn storage device alarm module is used for generating an alarm in response to the yarn storage device alarm signal.

[0010] Furthermore, the signal receiving module includes a switch module identification unit and a motor operation state identification unit;

[0011] The switch module identification unit is used to identify the preset open and / or closed state of the preset switch;

[0012] The motor operation state identification unit is used to identify the operation state of the motor, and the operation state of the motor includes a motor start state and a motor stop state.

[0013] Further, the motor operation state identification unit includes: a Hall sensor;

[0014] The Hall sensor is used to identify the running state of the motor through the jump signal time.

[0015] Further, the switch module identification unit includes: a first switch identification unit, a second switch identification unit and a third switch identification unit;

[0016] The first switch identification unit is used to identify the state of the first switch, where the state of the first switch includes short press to close or long press to close;

[0017] The second switch identification unit is used to identify the state of the second switch, where the state of the second switch includes open and closed;

[0018] The third switch identification unit is used to identify the state of the third switch, where the state of the third switch includes open and closed.

[0019] Further, the yarn storage device alarm condition signal includes: a first alarm condition signal, a second alarm condition signal and a third alarm condition signal;

[0020] The first alarm condition signal is: the running state of the motor is at startup and the transition time of the Hall sensor exceeds the preset transition time;

[0021] The second alarm condition signal is: the running state of the motor is after starting, and the state of the third switch is that the closing time exceeds the preset opening time;

[0022] The third alarm condition signal is: the state of the second switch is closed.

[0023] Furthermore, the yarn storage device signal processing module,

[0024] If the received yarn storage device operation signal is the first alarm condition signal, a control motor shutdown signal is output, and a preset first alarm mode alarm signal is output;

[0025] If the received yarn storage device operation signal is the second preset alarm condition signal, a control motor shutdown signal is output, and a preset second alarm mode alarm signal is output;

[0026] If the received yarn storage device operation signal is the third preset alarm condition signal, the output controls the motor to operate the brake signal in the preset reverse mode, and outputs the preset second alarm mode alarm signal.

[0027] A control circuit for a control system of a yarn storage device alarm, comprising a switch control circuit, a motor forward and reverse control circuit, a control output circuit and a DCDC step-down circuit;

[0028] The switch control circuit and the motor forward and reverse control circuit are electrically connected to the control output circuit respectively; the DCDC step-down circuit is electrically connected to the motor forward and reverse control circuit.

[0029] Furthermore, the switch control circuit includes a normally open switch SW1, a push switch SW2 and a normally closed switch SW3, and the normally open switch SW1, the push switch SW2 and the normally closed switch SW3 are electrically connected to the control output circuit respectively.

[0030] Furthermore, the control output circuit includes a control chip IC2, a transistor Q2, a transistor Q3, a diode D3, a diode SYS, a Hall sensor HR, a light-emitting diode R, a light-emitting diode G, a resistor R5, a resistor R6, a resistor R7, a resistor R9, and a resistor R13; the base of the transistor Q2 is connected to one end of the resistor R13 and the collector of the transistor Q3, the emitter of the transistor Q2 is connected to the positive electrode of the diode D3 and the emitter of the transistor Q3, and the cathode of the diode D3 is grounded; the base of the transistor Q3 is connected to pin 13 of the control chip IC2 through the resistor R9, one end of the resistor R7 is connected to the positive electrode of the diode SYS, the cathode of the diode SYS is connected to the control The 12th pin of the chip IC2 is connected, one end of the Hall sensor HR is connected to the 11th pin of the control chip IC2, and the other two ends of the Hall sensor HR are grounded and connected to VCC respectively; one end of the resistor R5 is connected to one end of the light emitting diode G, and the other end of the light emitting diode G is connected to VCC, one end of the resistor R6 is connected to one end of the light emitting diode R, and the other end of the light emitting diode R is connected to VCC, the normally open switch SW1 is connected to the 2nd pin of the control chip IC2, the push switch SW2 is connected to the 1st pin of the control chip IC2, and the normally closed switch SW3 is connected to the 3rd pin of the control chip IC2, the 7th pin of the control chip IC2 is connected to the motor forward and reverse control circuit, and the 8th pin of the control chip IC2 is grounded.

[0031] Furthermore, the motor forward and reverse control circuit includes a motor M1, a capacitor C1, a relay K1, a transistor Q1, a thyristor TQ1, a resistor R3, a bidirectional optocoupler OP1, a resistor R4, a diode D4, and a resistor R8; one end of the resistor R8 is connected to pin 4 of the control chip IC2, the other end of the resistor R8 is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to the negative electrode of the diode D4, the emitter of the transistor Q1 is connected to one end of the resistor R4 and VCC, and the The other end of the resistor R4 is connected to the transmitting end of the bidirectional optocoupler OP1, the receiving end of the bidirectional optocoupler OP1 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to one end of the thyristor TQ1, the other end of the thyristor TQ1 is connected to the receiving end of the bidirectional optocoupler OP1 and the DCDC step-down circuit, one end of the thyristor TQ1 is connected to the motor M1, the motor M1 and the capacitor C1 are connected in parallel and electrically connected to the relay K1, and the common end of the relay K1 is connected to the DCDC step-down circuit.

[0032] In summary, the utility model has the following beneficial effects:

[0033] The yarn storage device alarm control system of the utility model can judge the current fault state of the yarn storage device through the operation state of the first switch, the second switch, the third switch and the motor, and output the corresponding alarm signal;

[0034] The utility model detects the running state of the motor in real time through the Hall sensor, and when it is determined that the running state of the motor is inconsistent with the preset state, an alarm is used to remind the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a system structure diagram of the utility model.

[0036] Figure 2 The utility model is a control circuit principle diagram for a yarn storage device alarm control system.

[0037] Figure 3 It is a schematic diagram of the structure of the motor in the embodiment of the utility model.

[0038] In the figure: 21, motor shaft; 22, stator assembly; 23, rotor; 24, motor cover; 25, second bearing; 26, third bearing; 30, yarn storage drum; 1001, yarn pressing ring. DETAILED DESCRIPTION

[0039] The utility model is further described below in conjunction with the accompanying drawings.

[0040] like Figure 1 As shown, a control system for yarn storage device alarm includes a signal receiving module, a signal processing module, a control execution module and a yarn storage device alarm module;

[0041] The signal receiving module is used to receive the yarn storage device operation signal and send the received yarn storage device operation signal to the yarn storage device signal processing module;

[0042] The signal receiving module includes a switch module identification unit and a motor operation state identification unit;

[0043] The switch module identification unit is used to identify the preset open and / or closed state of the preset switch;

[0044] The motor operation state identification unit is used to identify the operation state of the motor, and the operation state of the motor includes the motor start state and the motor stop state. Further, the motor operation state identification unit includes: a Hall sensor; the Hall sensor is used to identify the operation state of the motor through the jump signal time.

[0045] The switch module identification unit includes: a first switch identification unit, a second switch identification unit and a third switch identification unit; the first switch identification unit is used to identify the state of the first switch, and the state of the first switch includes short press to close or long press to close; the second switch identification unit is used to identify the state of the second switch, and the state of the second switch includes open and closed; the third switch identification unit is used to identify the state of the third switch, and the state of the third switch includes open and closed.

[0046] The first switch provided in this embodiment is a push button switch, and a short press of the push button switch once is defined as power on or alarm clearing; a long press of the push button switch for 2 seconds is power off;

[0047] This button status has a saving function, which can save the running status of the yarn storage device when it is powered off and restarted, that is, shutdown or running.

[0048] The second switch provided in this embodiment is a normally open switch. When the normally open switch is closed, it is defined as a yarn break state of the yarn storage device.

[0049] The third switch in this embodiment is a normally closed switch, and the closing of the third switch is defined as the need to store yarn, and the opening of the third switch is defined as the need not to store yarn. The process from the closing to the opening of the third switch is the yarn storage process, and when the full yarn storage time is preset, in this embodiment, 30 seconds, the yarn storage device will be full of yarn.

[0050] After the yarn storage device is turned on, there are two states when the yarn storage device motor does not have any abnormal state: 1. The yarn storage device does not break the yarn; 2. The yarn storage device stores the yarn normally;

[0051] The specific operation process is:

[0052] 1. The yarn storage device is not broken: the second switch is in the disconnected state, and the yarn storage device is not broken at this time;

[0053] 2. The yarn storage device stores yarn normally: the third switch is in the closed state, that is, the yarn storage device needs to store yarn at this time, and the control motor starts to run. At this time, the motor starts to store yarn until the preset yarn storage time is full, and the third switch is in the open state, and the yarn storage stops.

[0054] This embodiment is to alarm when the motor running state is abnormal during the above operation process. In order to judge the abnormal motor running state, a yarn storage device signal processing module is provided in this embodiment;

[0055] The yarn storage device signal processing module is used to analyze whether the received yarn storage device operation signal is a yarn storage device alarm condition signal, wherein the yarn storage device alarm condition signal includes a motor operation state abnormality signal; and when the received yarn storage device operation signal is a yarn storage device alarm condition signal, output a corresponding control execution signal and an alarm signal;

[0056] Further, the yarn storage device alarm condition signal includes: a first alarm condition signal, a second alarm condition signal and a third alarm condition signal;

[0057] The first alarm condition signal is: when the running state of the motor is started and the Hall sensor jump time exceeds the preset jump time; the first alarm condition signal corresponds to when the Hall sensor jump signal exceeds the preset jump time during the running of the motor, which is set to 10 seconds in this embodiment, that is, when the Hall sensor jump signal is still executing, the motor stops running, indicating that the current motor state is a stalled state.

[0058] The second alarm condition signal is: the running state of the motor is after starting, and the state of the third switch is that the closing time exceeds the preset disconnection time; the second alarm condition signal corresponds to that during the operation of the motor, the yarn storage device fails to complete the yarn storage action within the preset yarn storage time, which is 30 seconds in this embodiment; indicating that the current motor state includes idling.

[0059] The third alarm condition signal is: the state of the second switch is closed. The closing of the second switch indicates yarn breakage.

[0060] The control execution module is used to receive the control execution signal and control the yarn storage device motor to run and stop according to the control execution signal; and to give a corresponding alarm through the yarn storage device alarm module.

[0061] In this embodiment, corresponding execution signals are set for the three alarm conditions:

[0062] If the received yarn storage device operation signal is the first alarm condition signal, a control motor shutdown signal is output, and a preset first alarm mode alarm signal is output;

[0063] That is, if the continuous jump signal of the HR Hall sensor is not detected for more than 10 seconds after the yarn storage device motor is started, that is, after receiving the first alarm condition signal, the yarn storage device motor is turned off by controlling the execution module, and an alarm signal is output, and at the same time, through the alarm module, the alarm module in this embodiment flashes the red light at intervals of 1 second;

[0064] If the received yarn storage device operation signal is the second preset alarm condition signal, a control motor shutdown signal is output, and a preset second alarm mode alarm signal is output;

[0065] If the third switch disconnection signal is not detected for more than 30 seconds after the yarn storage device motor is started, that is, after receiving the second alarm condition signal, the yarn storage device motor is turned off by controlling the execution module, and an alarm signal is output through the alarm module. In this embodiment, the alarm module flashes a red light at intervals of 1 second;

[0066] If the received yarn storage device operation signal is the third preset alarm condition signal, the output controls the motor to operate the brake signal in the preset reverse mode, and outputs the preset second alarm mode alarm signal.

[0067] If the second switch is closed, that is, after receiving the third alarm condition signal, the control execution module outputs a control signal to drive the motor to reverse to achieve the purpose of quickly braking the weft storage wheel of the yarn storage device, and at the same time outputs an alarm signal through the alarm module. In this embodiment, the red light is always on.

[0068] The motor provided in this embodiment has a self-locking function to prevent the motor from reversing. The specific motor structure is as follows: Figure 3 As shown: the motor includes a motor shaft 21, a stator assembly 22, a rotor 23 and a motor cover 24, wherein the stator assembly 22 is fixedly mounted on the outer periphery of the motor shaft 21, the rotor 23 is sleeved on the outer periphery of the stator assembly 22, the yarn storage drum 30 of the yarn storage device is fixedly sleeved on the outer periphery of the rotor 23 and can rotate synchronously with the rotor 23, the motor cover 24 is rotatably sleeved on the middle part of the motor shaft 21 through a second bearing 25, the motor cover 24 is fixedly connected to the yarn storage drum 30, the stator assembly 22 includes a stator fixedly mounted on the outer periphery of the motor shaft 21 and a coil wound around the outer periphery of the stator, when the yarn storage device is running, the motor drives the rotor 23 to rotate relative to the stator, and the rotor 23 The yarn storage drum 30 is driven to rotate together, and then the yarn is regularly wound on the yarn storage drum 30. Specifically, the middle part of the motor shaft 21 is provided with a second step portion, the motor cover 24 is provided with a mounting cavity, and the second bearing 25 is arranged in the mounting cavity. The upper end surface of the mounting cavity cooperates with the second step portion to limit the axial position of the second bearing 25. A tension ring is fixedly installed on the yarn storage drum 30 for adjusting the tension of the yarn. The upper end of the motor cover 24 is provided with an upper mounting cavity, and the lower end of the motor cover 24 is provided with a lower mounting cavity. The second bearing 25 is installed in one of the mounting cavities, and the third bearing 26 is installed in the other mounting cavity. The second bearing 25 or the third bearing 26 is a one-way bearing. The second bearing 25 and the third bearing 26 are separated by a flange. In the utility model, the second bearing 25 is a one-way bearing, and the third bearing 26 is a common bearing. The setting of the one-way bearing can avoid the occurrence of phenomena such as the yarn storage drum 30 stopping for no reason due to reversal, and the yarn running to the pressing ring 1001.

[0069] Therefore, the purpose of quickly braking the weft storage wheel of the yarn storage device can be achieved by driving the motor to reverse by controlling the control signal output by the execution module.

[0070] A control system for yarn storage device alarm provided by this embodiment can determine the current fault state of the yarn storage machine through the first switch, the second switch, the third switch and the operating state of the motor, and output the corresponding alarm signal, so as to timely discover the fault of the yarn storage device motor with high efficiency.

[0071] The yarn storage device alarm control system of the utility model can detect the rotation of the motor through the Hall sensor, judge whether the motor fails according to the rotation of the motor, and use the alarm to remind the user of the motor failure, thereby realizing the motor failure alarm function.

[0072] This embodiment also provides a control circuit for a control system of a yarn storage device alarm, including a switch control circuit, a motor forward and reverse control circuit, a control output circuit and a DCDC step-down circuit;

[0073] The switch control circuit and the motor forward and reverse control circuit are electrically connected to the control output circuit respectively; the DCDC step-down circuit is electrically connected to the motor forward and reverse control circuit.

[0074] Furthermore, the switch control circuit includes a normally open switch SW1, a push switch SW2 and a normally closed switch SW3, and the normally open switch SW1, the push switch SW2 and the normally closed switch SW3 are electrically connected to the control output circuit respectively.

[0075] Furthermore, the control output circuit includes a control chip IC2, a transistor Q2, a transistor Q3, a diode D3, a diode SYS, a Hall sensor HR, a light-emitting diode R, a light-emitting diode G, a resistor R5, a resistor R6, a resistor R7, a resistor R9, and a resistor R13; the base of the transistor Q2 is connected to one end of the resistor R13 and the collector of the transistor Q3, the emitter of the transistor Q2 is connected to the positive electrode of the diode D3 and the emitter of the transistor Q3, and the cathode of the diode D3 is grounded; the base of the transistor Q3 is connected to pin 13 of the control chip IC2 through the resistor R9, one end of the resistor R7 is connected to the positive electrode of the diode SYS, the cathode of the diode SYS is connected to the control The 12th pin of the chip IC2 is connected, one end of the Hall sensor HR is connected to the 11th pin of the control chip IC2, and the other two ends of the Hall sensor HR are grounded and connected to VCC respectively; one end of the resistor R5 is connected to one end of the light emitting diode G, and the other end of the light emitting diode G is connected to VCC, one end of the resistor R6 is connected to one end of the light emitting diode R, and the other end of the light emitting diode R is connected to VCC, the normally open switch SW1 is connected to the 2nd pin of the control chip IC2, the push switch SW2 is connected to the 1st pin of the control chip IC2, and the normally closed switch SW3 is connected to the 3rd pin of the control chip IC2, the 7th pin of the control chip IC2 is connected to the motor forward and reverse control circuit, and the 8th pin of the control chip IC2 is grounded.

[0076] Furthermore, the motor forward and reverse control circuit includes a motor M1, a capacitor C1, a relay K1, a transistor Q1, a thyristor TQ1, a resistor R3, a bidirectional optocoupler OP1, a resistor R4, a diode D4, and a resistor R8; one end of the resistor R8 is connected to pin 4 of the control chip IC2, the other end of the resistor R8 is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to the negative electrode of the diode D4, the emitter of the transistor Q1 is connected to one end of the resistor R4 and VCC, and the The other end of the resistor R4 is connected to the transmitting end of the bidirectional optocoupler OP1, the receiving end of the bidirectional optocoupler OP1 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to one end of the thyristor TQ1, the other end of the thyristor TQ1 is connected to the receiving end of the bidirectional optocoupler OP1 and the DCDC step-down circuit, one end of the thyristor TQ1 is connected to the motor M1, the motor M1 and the capacitor C1 are connected in parallel and electrically connected to the relay K1, and the common end of the relay K1 is connected to the DCDC step-down circuit.

[0077] The design of this circuit realizes the judgment of abnormal motor running state through the coordination relationship between three switches and motor running state, and realizes circuit alarm through light-emitting diode. The circuit connection relationship is simple and can realize the abnormal alarm function of yarn storage motor.

[0078] This circuit also includes a Hall sensor, which determines the abnormal operation state of the motor by the time the Hall sensor continuously jumps the signal, thereby determining how to determine the motor stall problem.

[0079] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A control system for a yarn storage device alarm, characterized in that: It includes a signal receiving module, a yarn storage device signal processing module, a control execution module and a yarn storage device alarm module; The signal receiving module is used to receive the yarn storage device operation signal and send the received yarn storage device operation signal to the yarn storage device signal processing module; The yarn storage device signal processing module is used to analyze whether the received yarn storage device operation signal is a yarn storage device alarm condition signal, wherein the yarn storage device alarm condition signal includes a motor operation state abnormality signal; and when the received yarn storage device operation signal is a yarn storage device alarm condition signal, output a corresponding control execution signal and an alarm signal; The control execution module is used to receive the control execution signal and control the yarn storage device motor to run and stop according to the control execution signal; The yarn storage device alarm module is used for generating an alarm in response to the yarn storage device alarm signal.

2. A control system for yarn storage device alarm according to claim 1, characterized in that: The signal receiving module includes a switch module identification unit and a motor operation state identification unit; The switch module identification unit is used to identify the preset open and / or closed state of the preset switch; The motor operation state identification unit is used to identify the operation state of the motor, and the operation state of the motor includes a motor start state and a motor stop state.

3. A control system for yarn storage device alarm according to claim 2, characterized in that: The motor operation state identification unit comprises: a Hall sensor; The Hall sensor is used to identify the running state of the motor through the jump signal time.

4. A control system for yarn storage device alarm according to claim 3, characterized in that: The switch module identification unit includes: a first switch identification unit, a second switch identification unit and a third switch identification unit; The first switch identification unit is used to identify the state of the first switch, where the state of the first switch includes short press to close or long press to close; The second switch identification unit is used to identify the state of the second switch, where the state of the second switch includes open and closed; The third switch identification unit is used to identify the state of the third switch, where the state of the third switch includes open and closed.

5. A control system for yarn storage device alarm according to claim 4, characterized in that: The yarn storage device alarm condition signal includes: a first alarm condition signal, a second alarm condition signal signal and the third alarm condition signal; The first alarm condition signal is: the running state of the motor is at startup and the transition time of the Hall sensor exceeds the preset transition time; The second alarm condition signal is: the running state of the motor is after starting, and the state of the third switch is that the closing time exceeds the preset opening time; The third alarm condition signal is: the state of the second switch is closed.

6. A control system for yarn storage device alarm according to claim 5, characterized in that: The yarn storage device signal processing module, If the received yarn storage device operation signal is the first alarm condition signal, a control motor shutdown signal is output, and a preset first alarm mode alarm signal is output; If the received yarn storage device operation signal is the second preset alarm condition signal, a control motor shutdown signal is output, and a preset second alarm mode alarm signal is output; If the received yarn storage device operation signal is the third preset alarm condition signal, the output controls the motor to operate the brake signal in the preset reverse mode, and outputs the preset second alarm mode alarm signal.

7. A control circuit for a yarn storage device alarm, used in a control system for a yarn storage device alarm as claimed in any one of claims 1 to 6, characterized in that: Switch control circuit, motor forward and reverse control circuit, control output circuit and DCDC step-down circuit; The switch control circuit and the motor forward and reverse control circuit are electrically connected to the control output circuit respectively; the DCDC step-down circuit is electrically connected to the motor forward and reverse control circuit.

8. A control circuit for yarn storage device alarm according to claim 7, characterized in that: The switch control circuit includes a normally open switch SW1, a push switch SW2 and a normally closed switch SW3. The normally open switch SW1, the push switch SW2 and the normally closed switch SW3 are electrically connected to the control output circuit respectively.

9. A control circuit for yarn storage device alarm according to claim 8, characterized in that: The control output circuit includes a control chip IC2, a transistor Q2, a transistor Q3, a diode D3, a diode SYS, a Hall sensor HR, a light emitting diode R, a light emitting diode G, a resistor R5, a resistor R6, a resistor R7, a resistor R9, and a resistor R13; the base of the transistor Q2 is connected to one end of the resistor R13 and the collector of the transistor Q3, the emitter of the transistor Q2 is connected to the positive electrode of the diode D3 and the emitter of the transistor Q3, and the cathode of the diode D3 is grounded; the base of the transistor Q3 is connected to the 13th pin of the control chip IC2 through the resistor R9, one end of the resistor R7 is connected to the positive electrode of the diode SYS, the cathode of the diode SYS is connected to the control chip IC2, and the cathode of the diode SYS is connected to the positive electrode of the diode SYS. The 12th pin of C2 is connected, one end of the Hall sensor HR is connected to the 11th pin of the control chip IC2, and the other two ends of the Hall sensor HR are grounded and connected to VCC respectively; one end of the resistor R5 is connected to one end of the light emitting diode G, and the other end of the light emitting diode G is connected to VCC, one end of the resistor R6 is connected to one end of the light emitting diode R, and the other end of the light emitting diode R is connected to VCC, the normally open switch SW1 is connected to the 2nd pin of the control chip IC2, the push switch SW2 is connected to the 1st pin of the control chip IC2, and the normally closed switch SW3 is connected to the 3rd pin of the control chip IC2, the 7th pin of the control chip IC2 is connected to the motor forward and reverse control circuit, and the 8th pin of the control chip IC2 is grounded.

10. A control circuit for yarn storage device alarm according to claim 9, characterized in that: The motor forward and reverse control circuit includes a motor M1, a capacitor C1, a relay K1, a transistor Q1, Thyristor TQ1, resistor R3, bidirectional optocoupler OP1, resistor R4, diode D4, resistor R8; one end of the resistor R8 is connected to pin 4 of the control chip IC2, the other end of the resistor R8 is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to the negative electrode of the diode D4, the emitter of the transistor Q1 is connected to one end of the resistor R4 and VCC, the other end of the resistor R4 is connected to the transmitting end of the bidirectional optocoupler OP1, the receiving end of the bidirectional optocoupler OP1 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to one end of the thyristor TQ1, the other end of the thyristor TQ1 is connected to the receiving end of the bidirectional optocoupler OP1 and the DCDC step-down circuit, one end of the thyristor TQ1 is connected to the motor M1, the motor M1 and the capacitor C1 are connected in parallel and electrically connected to the relay K1, and the common end of the relay K1 is connected to the DCDC step-down circuit.

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