Cutting Tool State Detection Device and Control Method for a Paper Cutting Mechanism

Abstract

The present invention discloses a cutter state detection device and a control method for a paper cutting mechanism. The cutter state detection device includes a cutter turntable and a state detection component. The cutter turntable is used to drive the cutter of the paper cutting mechanism to act, and the state detection component can detect the position of the cutter turntable, and thus detect the position of the cutter; the control method detects the cutter position through the cutter state detection device, so that the paper cutting mechanism operates reliably and can avoid damage to the paper cutting mechanism.

Description

Technical Field

[0001] The present invention relates to the field of paper towel machines, and particularly to a cutter state detection device and a control method for a paper cutting mechanism. Background Art

[0002] The shared paper towel machine is a shared intelligent device created through new retail, Internet of Things, and artificial intelligence, mainly solving the problem of paper towel use in public places with dense crowds, facilitating citizens to use paper when traveling. There is a type of paper towel machine that can automatically output roll paper. This paper towel machine realizes the cutting of the paper towel of the roll paper through a paper cutting mechanism. When the cutter of the paper cutting mechanism is in the closed position, the cutter cuts the paper towel of the roll paper; when the cutter of the paper cutting mechanism is in the open position, the paper towel can pass through the paper cutting mechanism. However, the reliability of the paper cutting mechanism of this paper towel machine is poor. The paper cutting mechanism cannot detect the position of the cutter of the paper cutting mechanism by itself, and it is easy to have a situation where the cutter does not move in place, seriously affecting the user experience. When cutting paper, if the cutter does not fully move to the closed position, the cutter will not be able to cut the paper towel; when feeding paper, if the cutter does not fully move to the open position, the cutter will scratch the paper towel. In addition, if the cutter gets stuck during the movement process, and the paper cutting mechanism continues to drive the cutter to move, it is easy to cause damage to the paper cutting mechanism. Summary of the Invention

[0003] The purpose of the present invention is to provide a cutter state detection device and a control method for a paper cutting mechanism. The cutter state detection device can be used to detect the position of the cutter of the paper cutting mechanism, and the control method can avoid damage to the paper cutting mechanism.

[0004] To achieve the above purpose, the solution of the present invention is:

[0005] A cutter state detection device includes a cutter turntable and a state detection component. The rotation of the cutter turntable is used to drive the cutter of the paper cutting mechanism to move, and the cutter turntable has the ability to reflect light. One end face of the cutter turntable is set as a detection end face, and an absorbent sheet is provided in cooperation with the detection end face. The absorbent sheet has the ability to absorb light. The state detection component includes a first reflective photoelectric switch, a second reflective photoelectric switch, and a signal processing module. The first reflective photoelectric switch and the second reflective photoelectric switch are arranged on one side of the detection end face of the cutter turntable. The position of the first reflective photoelectric switch corresponds to one of the open position and the closed position of the cutter of the paper cutting mechanism, and the position of the second reflective photoelectric switch corresponds to the other of the open position and the closed position of the cutter of the paper cutting structure. The detection ports of the first reflective photoelectric switch and the second reflective photoelectric switch face the detection end face of the cutter turntable, and the absorbent sheet movably covers the detection ports of the first reflective photoelectric switch and the second reflective photoelectric switch. The signal processing module is electrically connected to the first reflective photoelectric switch and the second reflective photoelectric switch.

[0006] The emitter and receiver of the first reflective photoelectric switch are a first light-emitting diode and a first phototransistor, respectively; the emitter and receiver of the second reflective photoelectric switch are a second light-emitting diode and a second phototransistor, respectively; the signal processing module includes a connection terminal, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first MOS transistor, and a first diode; the connection terminal is provided with a power supply terminal, a ground terminal, and a signal output terminal; the power supply terminal is electrically connected to the first end of the first resistor, the first end of the second resistor, the first end of the third resistor, and the source electrode of the first MOS transistor, and the ground terminal is electrically connected to the negative electrode of the first light-emitting diode, the emitter of the first phototransistor, the negative electrode of the second light-emitting diode, and the emitter of the second phototransistor; the signal output terminal is electrically connected to the first end of the sixth resistor, the collector of the second phototransistor, and the negative electrode of the first diode; the second end of the first resistor is electrically connected to the positive electrode of the first light-emitting diode, the second end of the second resistor is electrically connected to the collector of the first phototransistor, the second end of the third resistor, the second end of the sixth resistor, and the gate of the first MOS transistor; the drain electrode of the first MOS transistor is electrically connected to the first end of the fourth resistor and the first end of the fifth resistor, the second end of the fourth resistor is electrically connected to the positive electrode of the second light-emitting diode, and the second end of the fifth resistor is electrically connected to the positive electrode of the first diode.

[0007] The signal processing module further includes a first bidirectional voltage stabilizing diode and a second bidirectional voltage stabilizing diode. The two ends of the first bidirectional voltage stabilizing diode are electrically connected to the power supply terminal and the ground terminal respectively, and the two ends of the second bidirectional voltage stabilizing diode are electrically connected to the signal output terminal and the ground terminal respectively.

[0008] The first reflective photoelectric switch, the second reflective photoelectric switch, and the signal processing module of the status detection component are arranged on a detection circuit board.

[0009] A control method for a paper cutting mechanism, the paper cutting mechanism having the above-mentioned cutter status detection device, the control method comprising:

[0010] Step 1: Detect the position of the cutter of the paper cutting mechanism through the cutter status detection device; if it is detected through the cutter status detection device that the cutter is in the open position, go to Step 2; if the cutter is between the closed position and the open position, go to Step 3; if it is detected through the cutter status detection device that the cutter is in the closed position, go to Step 4;

[0011] Step 2: Wait for the paper cutting instruction to be issued; when the paper cutting instruction is issued, go to Step 5;

[0012] Step 3: Control the cutter turntable to rotate forward, so that the cutter turntable drives the cutter of the paper cutting mechanism to move towards the closed position, and detect the position of the cutter of the paper cutting mechanism in real time through the cutter state detection device; if it is detected by the cutter state detection device that the cutter moves to the closed position or it is detected by the cutter state detection device that the cutter remains between the open position and the closed position within the threshold time, then enter Step 4;

[0013] Step 4: Control the cutter turntable to rotate backward, so that the cutter turntable drives the cutter of the paper cutting mechanism to move towards the open position, and detect the position of the cutter of the paper cutting mechanism in real time through the cutter state detection device; if it is detected by the cutter state detection device that the cutter moves to the open position, then enter Step 2; if it is detected by the cutter state detection device that the cutter remains in the closed position or remains between the open position and the closed position within the threshold time, then control the cutter turntable to stop rotating and end;

[0014] Step 5: Control the cutter turntable to rotate forward, so that the cutter turntable drives the cutter of the paper cutting mechanism to move towards the closed position, and detect the position of the cutter of the paper cutting mechanism in real time through the cutter state detection device; if it is detected by the cutter state detection device that the cutter moves to the closed position, then control the cutter turntable to stop rotating and enter Step 6; if it is detected by the cutter state detection device that the cutter remains in the open position or remains between the open position and the closed position within the threshold time, then control the cutter turntable to stop rotating and end;

[0015] Step 6: Control the cutter turntable to rotate backward, so that the cutter turntable drives the cutter of the paper cutting mechanism to move towards the open position, and detect the position of the cutter of the paper cutting mechanism in real time through the cutter state detection device; if it is detected by the cutter state detection device that the cutter moves to the open position, control the cutter turntable to stop rotating and enter Step 2; if it is detected by the cutter state detection device that the cutter remains in the open position or remains between the open position and the closed position within the threshold time, then control the cutter turntable to stop rotating and end.

[0016] The positions of the first reflective photoelectric switch and the second reflective photoelectric switch of the cutter state detection device respectively correspond to the open position and the closed position of the cutter of the paper cutting mechanism; the method for detecting the position of the cutter of the paper cutting mechanism through the cutter state detection device is: detecting the voltage of the position signal output by the detection signal output end; if the voltage of the position signal output by the signal output end is greater than V1, it is judged that the cutter is in the open position; if the output voltage of the signal output end is between the second voltage value V2 and the third voltage value V3, then it is judged that the cutter is in the closed position; if the output voltage of the signal output end is less than V4, then it is judged that the cutter is between the open position and the closed position; where V1, V2, V3 and V4 decrease in turn, V1 = VCC - Ve1, V2 = Va + Ve2, Va = (R5 + RQ11 ) / (R M1 + R5 + R6 + R D1 + R Q11) ) * VCC, V3 = Va - Ve3, V4 = 0 + Ve4, where Ve1, Ve2, Ve3, and Ve4 are respectively the set first error voltage value, second error voltage value, third error voltage value, and fourth error voltage value, VCC is the voltage at the power supply terminal, R5 and R6 are respectively the resistance values of the fifth resistor and the sixth resistor, and R Q11 is the on-resistance between the collector and emitter when the first phototransistor is on, and R M1 is the on-resistance between the source and drain when the first MOS transistor is on.

[0017] The positions of the first reflective optoelectronic switch and the second reflective optoelectronic switch of the cutter state detection device respectively correspond to the closed position and the open position of the cutter of the paper cutting mechanism; the method for detecting the position of the cutter of the paper cutting mechanism by the cutter state detection device is: detecting the voltage of the position signal output by the signal output terminal; if the voltage of the position signal output by the signal output terminal is greater than V1, it is determined that the cutter is in the closed position; if the output voltage of the signal output terminal is between the second voltage value V2 and the third voltage value V3, it is determined that the cutter is in the open position; if the output voltage of the signal output terminal is less than V4, it is determined that the cutter is between the open position and the closed position; where V1, V2, V3, and V4 decrease in sequence, V1 = VCC - Ve1, V2 = Va + Ve2, Va = (R5 + R Q11 ) / (R M1 + R5 + R6 + R D1 + R Q11) ) * VCC, V3 = Va - Ve3, V4 = 0 + Ve4, where Ve1, Ve2, Ve3, and Ve4 are respectively the set first error voltage value, second error voltage value, third error voltage value, and fourth error voltage value, VCC is the voltage at the power supply terminal, R5 and R6 are respectively the resistance values of the fifth resistor and the sixth resistor, and R Q11 is the on-resistance between the collector and emitter when the first phototransistor is on, and R M1 is the on-resistance between the source and drain when the first MOS transistor is on.

[0018] Ve1 and Ve4 are 0.3 volts, and Ve2 and Ve3 are 0.1 volts.

[0019] The threshold time is 1 second.

[0020] After adopting the above solution, the present invention has the following characteristics:

[0021] 1. The cutting knife turntable of the present invention is used to drive the cutting knife of the paper cutting mechanism, and the cutting knife turntable has the ability of light reflection. The position of the first reflective photoelectric switch corresponds to one of the open position and the closed position of the cutting knife of the paper cutting mechanism, and the position of the second reflective photoelectric switch corresponds to the other of the open position and the closed position of the cutting knife of the paper cutting structure. And the light absorbing sheet cooperating with the cutting knife turntable movably covers the detection ports of the first reflective photoelectric switch and the second reflective photoelectric switch. In this way, the cutting knife state detection device of the present invention can obtain the position of the cutting knife turntable according to the switch states of the first reflective photoelectric switch and the second reflective photoelectric switch, and further obtain which one of the closed position, the open position, and between the closed position and the open position the cutting knife is in, thereby realizing the detection of the position of the cutting knife of the paper cutting mechanism;

[0022] 2. By obtaining the voltage magnitude of the position signal output from the signal output end of the state detection component, the present invention can know the position of the cutting knife turntable, and further know the position of the cutting knife of the paper cutting mechanism, which helps to reduce the connection wires between the state detection component and the external controller and achieves the effect of simplifying the wiring;

[0023] 3. The control method of the present invention detects the position of the cutting knife of the paper cutting mechanism through the cutting knife state detection device, which can make the cutting knife action accurate in place and can effectively avoid continuously driving the cutting knife action when the cutting knife is stuck, thereby avoiding damage to the paper cutting mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the cutting knife state detection device of the present invention Figure 1 ;

[0025] Figure 2 is a schematic structural diagram of the cutting knife state detection device of the present invention Figure 2 ;

[0026] Figure 3 is a schematic circuit diagram of the state detection component of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0027] In order to further explain the technical solution of the present invention, the present invention will be elaborated in detail through specific embodiments below.

[0028] As Figures 1 to 3 shown, the present invention discloses a cutting knife state detection device, which is used to monitor the position of the cutting knife of the paper cutting mechanism. The cutting knife state detection device includes a cutting knife turntable Z and a state detection component S, and the state detection component S can detect the position of the cutting knife turntable Z.

[0029] Specifically, cooperate with Figure 1 and Figure 2As shown, the rotation of the cutter turntable Z is used to drive the cutter of the paper cutting mechanism. The cutter turntable Z can drive the cutter through a gear-rack matching structure or a cam matching structure, so that the cutter can move between an open position and a closed position. The driving of the cutter by the cutter turntable Z is prior art and will not be elaborated here. The cutter turntable Z has the ability to reflect light. The cutter turntable Z can be white to have the ability to reflect light. One end face of the cutter turntable Z is set as the detection end face Z1, and an absorbing sheet P is provided in cooperation with the detection end face Z1. The absorbing sheet P has the ability to absorb light. The absorbing sheet P can be black to have the ability to absorb light. The absorbing sheet P can be adhered to the cutter turntable Z.

[0030] cooperate Figures 1 to 3As shown, the state detection component S includes a first reflective photoelectric switch S1, a second reflective photoelectric switch S2 and a signal processing module S3, and the first reflective photoelectric switch S1, the second reflective photoelectric switch S2 and the signal processing module S3 can be arranged on a detection circuit board S4 to facilitate people to install the state detection component S; wherein the first reflective photoelectric switch S1 and the second reflective photoelectric switch S2 are arranged on one side of the detection end surface Z1 of the cutter rotary disk Z, the position of the first reflective photoelectric switch S1 corresponds to one of the open position and the closed position of the cutter of the paper cutting mechanism, and the position of the second reflective photoelectric switch S2 corresponds to the other of the open position and the closed position of the cutter of the paper cutting mechanism; The detection ports of the first reflective photoelectric switch S1 and the second reflective photoelectric switch S2 face the detection end surface Z1 of the cutter turntable Z, and the light absorbing sheet P movably covers the detection ports of the first reflective photoelectric switch S1 and the second reflective photoelectric switch S2; the signal processing module S3 is electrically connected to the first reflective photoelectric switch S1 and the second reflective photoelectric switch S2, and the signal processing module S3 is used to generate a corresponding position signal according to the switching state of the first reflective photoelectric switch S1 and the second reflective photoelectric switch S2, and to feedback the position of the cutter turntable Z through the position signal, and then feedback whether the cutter of the paper cutting mechanism is in the closed position, the open position, or between the closed position and the open position. In the present invention, when the cutter turntable Z rotates to the point where the light absorbing sheet P covers the first reflective photoelectric switch S1, the light emitted by the transmitter of the first reflective photoelectric switch S1 is absorbed by the light absorbing sheet P, so that the receiver of the first reflective photoelectric switch S1 cannot receive the light emitted by the transmitter of the first reflective photoelectric switch S1, thereby turning off the first reflective photoelectric switch S1; and when the cutter turntable Z rotates to the point where the light absorbing sheet P covers the second reflective photoelectric switch S2, the light emitted by the transmitter of the second reflective photoelectric switch S2 is absorbed by the light absorbing sheet P, so that the receiver of the second reflective photoelectric switch S2 cannot receive the light emitted by the transmitter of the second reflective photoelectric switch S2. The light emitted by the emitter of the reflective photoelectric switch S2 turns off the second reflective photoelectric switch S2; when the cutter turntable Z rotates to the point where the light absorbing sheet P does not cover the first reflective photoelectric switch S1 and the second reflective photoelectric switch S2, the light emitted by the emitter of the first reflective photoelectric switch S1 is reflected by the cutter turntable Z and received by the receiver of the first reflective photoelectric switch S1, and the light emitted by the emitter of the second reflective photoelectric switch S2 is reflected by the cutter turntable Z and received by the receiver of the second reflective photoelectric switch S2, thus turning on the first reflective photoelectric switch S1 and the second reflective photoelectric switch S2. Figure 3 As shown, the transmitter and receiver of the first reflective photoelectric switch S1 are respectively the first light emitting diode D11 and the first phototransistor Q11; and the transmitter and receiver of the second reflective photoelectric switch S2 are respectively the second light emitting diode D21 and the second phototransistor Q21.

[0031] The cutting tool turntable Z and the state detection component S can be arranged in a dark box to avoid interference from external light to the first reflective optoelectronic switch S1 and the second reflective optoelectronic switch S2. The cutting tool turntable Z is rotatably arranged in the dark box, and the rotation of the cutting tool turntable Z can be driven by a motor, while the state detection component S is fixedly arranged in the dark box.

[0032] Cooperate with Figure 3 As shown, the signal processing module S3 includes a connection terminal PIN, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first MOS transistor M1, and a first diode D1. The connection terminal PIN is provided with a power supply terminal VCC, a ground terminal GND, and a signal output terminal OUT. The power supply terminal VCC is electrically connected to the first end of the first resistor R1, the first end of the second resistor R2, the first end of the third resistor R3, and the source electrode of the first MOS transistor M1. The ground terminal GND is electrically connected to the negative electrode of the first light-emitting diode D11, the emitter of the first optoelectronic triode Q11, the negative electrode of the second light-emitting diode D21, and the emitter of the second optoelectronic triode Q21. The signal output terminal OUT is electrically connected to the first end of the sixth resistor R6, the collector of the second optoelectronic triode Q21, and the negative electrode of the first diode D1. The second end of the first resistor R1 is electrically connected to the positive electrode of the first light-emitting diode. The second end of the second resistor R2 is electrically connected to the collector of the first optoelectronic triode, the second end of the third resistor R3, the second end of the sixth resistor R6, and the gate of the first MOS transistor M1. The drain electrode of the first MOS transistor M1 is electrically connected to the first end of the fourth resistor R4 and the first end of the fifth resistor R5. The second end of the fourth resistor R4 is electrically connected to the positive electrode of the second light-emitting diode. The second end of the fifth resistor R5 is electrically connected to the positive electrode of the first diode D1. Among them, the power supply terminal VCC and the ground terminal GND are used to connect the positive and negative terminals of the power supply, while the signal output terminal OUT is used to output the position signal.

[0033] Cooperate with Figure 3 As shown, the signal processing module S3 further includes a first bidirectional voltage stabilizing diode ZD1 and a second bidirectional voltage stabilizing diode ZD2. The two ends of the first bidirectional voltage stabilizing diode ZD1 are respectively electrically connected to the power supply terminal VCC and the ground terminal GND. The two ends of the second bidirectional voltage stabilizing diode ZD2 are respectively electrically connected to the signal output terminal OUT and the ground terminal GND. The second bidirectional voltage stabilizing diode ZD2 can play an electrostatic protection function to protect the external circuit connected to the signal output terminal OUT.

[0034] The specific working principle of the state detection component S of the present invention is as follows:

[0035] When the cutting tool turntable Z rotates to the position where the light-absorbing sheet P covers the first reflective optoelectronic switch S1, the light emitted by the first light-emitting diode D11 of the first reflective optoelectronic switch S1 is absorbed by the light-absorbing sheet P at this time, causing the first phototransistor Q11 of the first reflective optoelectronic switch S1 to be cut off; the first phototransistor Q11 is cut off, making the gate voltage of the first MOS transistor M1 high, and then causing the first MOS transistor M1 to be cut off; the first MOS transistor M1 is cut off, making the second light-emitting diode D21 of the second reflective optoelectronic switch S2 not work, and then causing the second phototransistor Q21 of the second reflective optoelectronic switch S2 to also be cut off; in this way, the voltage of the position signal output at the signal output terminal OUT is close to VCC at this time, and VCC is the voltage of the power supply terminal VCC.

[0036] When the cutting tool turntable Z rotates to the position where the light-absorbing sheet P covers the second reflective optoelectronic switch S2, the light emitted by the first light-emitting diode D11 of the first reflective optoelectronic switch S1 is reflected by the cutting tool turntable Z and then absorbed by the first phototransistor Q11 of the first reflective optoelectronic switch S1 at this time, causing the first phototransistor Q11 of the first reflective optoelectronic switch S1 to conduct; the first phototransistor Q11 conducts, making the gate voltage of the first MOS transistor M1 decrease, and then causing the first MOS transistor M1 to conduct, thereby causing the second light-emitting diode D21 of the second reflective optoelectronic switch S2 to conduct and emit light; at this time, the light emitted by the second light-emitting diode D21 is absorbed by the light-absorbing sheet P, causing the second phototransistor Q21 of the second reflective optoelectronic switch S2 to be cut off; in this way, the current of the power supply terminal VCC passes through the first MOS transistor M1, the fifth resistor R5, the first diode D1, the sixth resistor R6, and the first phototransistor Q11 to the ground terminal GND in sequence at this time, and the voltage of the position signal output at the signal output terminal OUT is close to Va at this time; Va = (R5 + R Q11 ) / (R M1 + R5 + R6 + R D1 + R Q11) ) * VCC; where R5 and R6 are the resistances of the fifth resistor R5 and the sixth resistor R6 respectively, R Q11 is the on-resistance between the collector and emitter of the first phototransistor Q11 when it conducts, and R M1 is the on-resistance between the source and drain of the first MOS transistor M1 when it conducts.

[0037] When the cutter turntable Z rotates to a position where the light-absorbing sheet P does not cover the first reflective optoelectronic switch S1 and the second reflective optoelectronic switch S2, at this time, the light emitted by the first light-emitting diode D11 of the first reflective optoelectronic switch S1 is reflected by the cutter turntable Z and then absorbed by the first phototransistor Q11 of the first reflective optoelectronic switch S1, causing the first phototransistor Q11 of the first reflective optoelectronic switch S1 to conduct; the conduction of the first phototransistor Q11 causes the gate voltage of the first MOS transistor M1 to decrease, and further causes the first MOS transistor M1 to conduct, thereby causing the second light-emitting diode D21 of the second reflective optoelectronic switch S2 to conduct and emit light; and at this time, the light emitted by the second light-emitting diode D21 of the second reflective optoelectronic switch S2 is reflected by the cutter turntable Z and then absorbed by the second phototransistor Q21 of the second reflective optoelectronic switch S2, causing the second phototransistor Q21 of the second reflective optoelectronic switch S2 to conduct, and further causing the signal output terminal OUT to be conducted to the ground terminal GND through the second phototransistor Q21. At this time, the voltage of the position signal output by the signal output terminal OUT is close to zero.

[0038] As can be seen from the above, in the case where the positions of the first reflective optoelectronic switch S1 and the second reflective optoelectronic switch S2 of the present invention respectively correspond to the open position and the closed position of the cutter of the paper cutting mechanism; if the voltage of the position signal output by the signal output terminal OUT is close to VCC, it can be determined that the cutter turntable Z rotates to a position where the light-absorbing sheet P covers the first reflective optoelectronic switch S1, and further determine that the cutter turntable Z drives the cutter of the paper cutting mechanism to move to the open position; if the voltage of the position signal output by the signal output terminal OUT is close to Va, it can be determined that the cutter turntable Z rotates to a position where the light-absorbing sheet P covers the second reflective optoelectronic switch S2, and further determine that the cutter turntable Z drives the cutter of the paper cutting mechanism to move to the closed position; if the voltage of the position signal output by the signal output terminal OUT is close to zero, it can be determined that the cutter turntable Z rotates to a position where the light-absorbing sheet P does not cover the first reflective optoelectronic switch S1 and the second reflective optoelectronic switch S2, and further determine that the cutter turntable Z drives the cutter of the paper cutting mechanism to move between the open position and the closed position.

[0039] As can be seen from the above, in the case where the positions of the first reflective photoelectric switch S1 and the second reflective photoelectric switch S2 of the present invention respectively correspond to the closed position and the open position of the cutter of the paper cutting mechanism; if the voltage of the position signal output by the signal output terminal OUT is close to VCC, it can be determined that the cutter turntable Z rotates to the position where the light absorbing sheet P covers the first reflective photoelectric switch S1, and further determine that the cutter turntable Z drives the cutter of the paper cutting mechanism to act to the closed position; if the voltage of the position signal output by the signal output terminal OUT is close to Va, it can be determined that the cutter turntable Z rotates to the position where the light absorbing sheet P covers the second reflective photoelectric switch S2, and further determine that the cutter turntable Z drives the cutter of the paper cutting mechanism to act to the open position; if the voltage of the position signal output by the signal output terminal OUT is close to zero, it can be determined that the cutter turntable Z rotates to the position where the light absorbing sheet P does not cover the first reflective photoelectric switch S1 and the second reflective photoelectric switch S2, and further determine that the cutter turntable Z drives the cutter of the paper cutting mechanism to act between the open position and the closed position.

[0040] In summary, by obtaining the voltage magnitude of the position signal output by the signal output terminal OUT of the state detection component of the present invention, the position of the cutter turntable Z can be known, and further the position of the cutter of the paper cutting mechanism can be known, thus realizing the detection of the position of the cutter of the paper cutting mechanism; moreover, the present invention only needs to detect the voltage magnitude of the position signal output by the signal output terminal OUT to obtain the three position states of the cutter, which helps to reduce the connection wires between the state detection component and the external controller and achieves the effect of simplifying the wiring.

[0041] The present invention also provides a control method for a paper cutting mechanism, the paper cutting mechanism having the above cutter state detection device, and the control method includes:

[0042] Step 1: Detect the position of the cutter of the paper cutting mechanism through the cutter state detection device; if it is detected through the cutter state detection device that the cutter is in the open position, enter Step 2; if the cutter is between the closed position and the open position, enter Step 3; if it is detected through the cutter state detection device that the cutter is in the closed position, enter Step 4;

[0043] Step 2: Wait for the paper cutting instruction to be issued; when the paper cutting instruction is issued, enter Step 5;

[0044] Step 3: Control the cutter turntable Z to rotate forward so that the cutter turntable Z drives the cutter of the paper cutting mechanism to act towards the closed position, and continuously detect the position of the cutter of the paper cutting mechanism through the cutter state detection device; wherein if it is detected through the cutter state detection device that the cutter acts to the closed position or it is detected through the cutter state detection device that the cutter remains between the open position and the closed position within the threshold time, enter Step 4;

[0045] Step Four: Control the cutter turntable Z to rotate in the reverse direction, so that the cutter turntable Z drives the cutter of the paper cutting mechanism to move towards the open position, and detect the position of the cutter of the paper cutting mechanism in real time through the cutter state detection device; if it is detected by the cutter state detection device that the cutter moves to the open position, then enter Step Two; if it is detected by the cutter state detection device that the cutter remains in the closed position or remains between the open position and the closed position within the threshold time, then control the cutter turntable Z to stop rotating and end;

[0046] Step Five: Control the cutter turntable Z to rotate in the forward direction, so that the cutter turntable Z drives the cutter of the paper cutting mechanism to move towards the closed position, and detect the position of the cutter of the paper cutting mechanism in real time through the cutter state detection device; when it is detected by the cutter state detection device that the cutter moves to the closed position, then control the cutter turntable Z to stop rotating and enter Step Six; if it is detected by the cutter state detection device that the cutter remains in the open position or remains between the open position and the closed position within the threshold time, then control the cutter turntable Z to stop rotating and end;

[0047] Step Six: Control the cutter turntable Z to rotate in the reverse direction, so that the cutter turntable Z drives the cutter of the paper cutting mechanism to move towards the open position, and detect the position of the cutter of the paper cutting mechanism in real time through the cutter state detection device; when the cutter state detection device detects that the cutter moves to the open position, control the cutter turntable Z to stop rotating and enter Step Two; if the cutter state detection device detects that the cutter remains in the open position or remains between the open position and the closed position within the threshold time, then control the cutter turntable Z to stop rotating and end.

[0048] If it is detected in Step 1 that the cutter is between the closed position and the open position, then proceed to Step 3 and then to Step 4. Such a setting can test whether the movement of the cutter of the paper cutting mechanism is smooth. In Step 3 of the present invention, if it is detected by the cutter state detection device that the cutter remains between the open position and the closed position within the threshold time, then proceed to Step 4. In this way, when the cutter of the paper cutting mechanism is stuck and unable to move towards the closed position, the cutter of the paper cutting mechanism can be controlled to move towards the open position, which helps the paper towel stuck to the cutter of the paper cutting mechanism to fall off and facilitates the maintenance personnel to clean the paper towel stuck to the cutter of the paper cutting mechanism. In Step 4 of the present invention, when it is detected by the cutter state detection device that the cutter remains in the closed position or remains between the open position and the closed position within the threshold time, then control the cutter turntable Z to stop rotating and end. In this way, it can be avoided to continue driving the cutter to move when the cutter is stuck, thus avoiding damage to the paper cutting mechanism. In Step 5 of the present invention, when it is detected by the cutter state detection device that the cutter remains in the open position or remains between the open position and the closed position within the threshold time, then control the cutter turntable Z to stop rotating and end. In this way, it can be avoided to continue driving the cutter to move when the cutter is stuck, thus avoiding damage to the paper cutting mechanism. Similarly, in Step 6 of the present invention, when it is detected by the cutter state detection device that the cutter remains in the closed position or remains between the open position and the closed position within the threshold time, then control the cutter turntable Z to stop rotating and end. In this way, it can be avoided to continue driving the cutter to move when the cutter is stuck, thus avoiding damage to the paper cutting mechanism. The threshold time can be 1 second.

[0049] When the positions of the first reflective optoelectronic switch S1 and the second reflective optoelectronic switch S2 correspond to the open position and the closed position of the cutter of the paper cutting mechanism respectively, the method for detecting the position of the cutter of the paper cutting mechanism by the cutter state detection device is as follows: detecting the voltage of the position signal output by the detection signal output terminal OUT; if the voltage of the position signal output by the signal output terminal OUT is greater than V1, it is determined that the cutter is in the open position; if the output voltage of the signal output terminal OUT is between the second voltage value V2 and the third voltage value V3, it is determined that the cutter is in the closed position; if the output voltage of the signal output terminal OUT is less than V4, it is determined that the cutter is between the open position and the closed position. When the positions of the first reflective optoelectronic switch S1 and the second reflective optoelectronic switch S2 correspond to the closed position and the open position of the cutter of the paper cutting mechanism respectively, the method for detecting the position of the cutter of the paper cutting mechanism by the cutter state detection device is as follows: detecting the voltage of the position signal output by the detection signal output terminal OUT; if the voltage of the position signal output by the signal output terminal OUT is greater than V1, it is determined that the cutter is in the closed position; if the output voltage of the signal output terminal OUT is between the second voltage value V2 and the third voltage value V3, it is determined that the cutter is in the open position; if the output voltage of the signal output terminal OUT is less than V4, it is determined that the cutter is between the open position and the closed position. Among them, V1, V2, V3 and V4 decrease in sequence, V1 = VCC - Ve1, V2 = Va + Ve2, V3 = Va - Ve3, V4 = 0 + Ve4, and Ve1, Ve2, Ve3, Ve4 are the set first error voltage value, second error voltage value, third error voltage value and fourth error voltage value respectively. The setting of the first error voltage value, second error voltage value, third error voltage value and fourth error voltage value takes into account voltage fluctuations and device errors to ensure more accurate detection of the position of the cutter; among them, Ve1 and Ve4 can be 0.3 volts, and Ve2 and Ve3 can be 0.1 volts.

[0050] The above embodiments and diagrams do not limit the product form and style of the present invention. Any appropriate changes or modifications made by those of ordinary skill in the art shall be regarded as not departing from the patent scope of the present invention.

Claims

1. A cutter state detection device, characterized in that: It includes a cutter turntable and a status detection component; The rotation of the cutter turntable is used to drive the cutter of the paper cutting mechanism to act, and the cutter turntable has the ability to reflect light. One end face of the cutter turntable is set as a detection end face, and an absorbent sheet is provided in cooperation with the detection end face. The absorbent sheet has the ability to absorb light; The status detection component includes a first reflective optoelectronic switch, a second reflective optoelectronic switch and a signal processing module; the first reflective optoelectronic switch and the second reflective optoelectronic switch are arranged on one side of the detection end face of the cutter turntable. The position of the first reflective optoelectronic switch corresponds to one of the open position and the closed position of the cutter of the paper cutting mechanism, and the position of the second reflective optoelectronic switch corresponds to the other of the open position and the closed position of the cutter of the paper cutting structure; the detection ports of the first reflective optoelectronic switch and the second reflective optoelectronic switch face the detection end face of the cutter turntable, and the absorbent sheet movably covers the detection ports of the first reflective optoelectronic switch and the second reflective optoelectronic switch; the signal processing module is electrically connected to the first reflective optoelectronic switch and the second reflective optoelectronic switch; The emitter and receiver of the first reflective optoelectronic switch are a first light-emitting diode and a first phototransistor respectively; the emitter and receiver of the second reflective optoelectronic switch are a second light-emitting diode and a second phototransistor respectively; the signal processing module includes a connection terminal, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first MOS transistor and a first diode; the connection terminal is provided with a power supply terminal, a ground terminal and a signal output terminal; the power supply terminal is electrically connected to the first end of the first resistor, the first end of the second resistor, the first end of the third resistor and the source electrode of the first MOS transistor, and the ground terminal is electrically connected to the negative electrode of the first light-emitting diode, the emitter of the first phototransistor, the negative electrode of the second light-emitting diode and the emitter of the second phototransistor; the signal output terminal is electrically connected to the first end of the sixth resistor, the collector of the second phototransistor and the negative electrode of the first diode; the second end of the first resistor is electrically connected to the positive electrode of the first light-emitting diode, the second end of the second resistor is electrically connected to the collector of the first phototransistor, the second end of the third resistor, the second end of the sixth resistor and the gate of the first MOS transistor; the drain of the first MOS transistor is electrically connected to the first end of the fourth resistor and the first end of the fifth resistor, the second end of the fourth resistor is electrically connected to the positive electrode of the second light-emitting diode, and the second end of the fifth resistor is electrically connected to the positive electrode of the first diode; The cutter turntable and the status detection component are arranged in a dark box.

2. The cutter state detection device according to claim 1, wherein: The signal processing module further includes a first bidirectional voltage stabilizing diode and a second bidirectional voltage stabilizing diode. The two ends of the first bidirectional voltage stabilizing diode are respectively electrically connected to the power supply terminal and the ground terminal, and the two ends of the second bidirectional voltage stabilizing diode are respectively electrically connected to the signal output terminal and the ground terminal.

3. The cutter state detection device according to claim 1, wherein: The first reflective optoelectronic switch, the second reflective optoelectronic switch and the signal processing module of the status detection component are arranged on a detection circuit board.

4. A control method for a paper cutting mechanism, characterized in that: The paper cutting mechanism has the cutter status detection device as described in claim 1, and the control method includes: Step 1: Detect the position of the cutter of the paper cutting mechanism through the cutter state detection device; if it is detected by the cutter state detection device that the cutter is in the open position, go to Step 2; if the cutter is between the closed position and the open position, go to Step 3; if it is detected by the cutter state detection device that the cutter is in the closed position, go to Step 4; Step 2: Wait for the paper cutting instruction to be issued; when the paper cutting instruction is issued, go to Step 5; Step 3: Control the cutter turntable to rotate forward, so that the cutter turntable drives the cutter of the paper cutting mechanism to move towards the closed position, and continuously detect the position of the cutter of the paper cutting mechanism through the cutter state detection device; if it is detected by the cutter state detection device that the cutter moves to the closed position or it is detected by the cutter state detection device that the cutter remains between the open position and the closed position within the threshold time, go to Step 4; Step 4: Control the cutter turntable to rotate backward, so that the cutter turntable drives the cutter of the paper cutting mechanism to move towards the open position, and continuously detect the position of the cutter of the paper cutting mechanism through the cutter state detection device; if it is detected by the cutter state detection device that the cutter moves to the open position, go to Step 2; if it is detected by the cutter state detection device that the cutter remains in the closed position or remains between the open position and the closed position within the threshold time, control the cutter turntable to stop rotating and end; Step 5: Control the cutter turntable to rotate forward, so that the cutter turntable drives the cutter of the paper cutting mechanism to move towards the closed position, and continuously detect the position of the cutter of the paper cutting mechanism through the cutter state detection device; if it is detected by the cutter state detection device that the cutter moves to the closed position, control the cutter turntable to stop rotating, and go to Step 6; if it is detected by the cutter state detection device that the cutter remains in the open position or remains between the open position and the closed position within the threshold time, control the cutter turntable to stop rotating and end; Step 6: Control the cutter turntable to rotate backward, so that the cutter turntable drives the cutter of the paper cutting mechanism to move towards the open position, and continuously detect the position of the cutter of the paper cutting mechanism through the cutter state detection device; if it is detected by the cutter state detection device that the cutter moves to the open position, control the cutter turntable to stop rotating, and go to Step 2; if it is detected by the cutter state detection device that the cutter remains in the open position or remains between the open position and the closed position within the threshold time, control the cutter turntable to stop rotating and end.

5. The control method of a paper cutting mechanism according to claim 4, characterized in that: The positions of the first reflective photoelectric switch and the second reflective photoelectric switch of the cutter state detection device respectively correspond to the open position and the closed position of the cutter of the paper cutting mechanism; The method for detecting the position of the cutter of the paper cutting mechanism through the cutter state detection device is: detecting the voltage of the position signal output by the detection signal output end; if the voltage of the position signal output by the signal output end is greater than V1, it is judged that the cutter is in the open position; if the output voltage of the signal output end is between the second voltage value V2 and the third voltage value V3, it is judged that the cutter is in the closed position; if the output voltage of the signal output end is less than V4, it is judged that the cutter is between the open position and the closed position; where V1, V2, V3, and V4 decrease in sequence, V1 = VCC - Ve1, V2 = Va + Ve2, Va = (R5 + R Q11 ) / (R M1 + R5 + R6 + R D1 + R Q11 ) * VCC, V3 = Va - Ve3, V4 = 0 + Ve4, Ve1, Ve2, Ve3, and Ve4 are respectively the set first error voltage value, second error voltage value, third error voltage value, and fourth error voltage value, VCC is the voltage at the power supply terminal, R5 and R6 are respectively the resistance values of the fifth resistor and the sixth resistor, R Q11 is the on-resistance between the collector and emitter when the first phototransistor is on, R M1 is the on-resistance between the source and drain when the first MOS transistor is on, R D1 is the on-resistance of the first diode.

6. The control method of a paper cutting mechanism according to claim 4, characterized in that: The positions of the first reflective photoelectric switch and the second reflective photoelectric switch of the cutter state detection device respectively correspond to the closed position and the open position of the cutter of the paper cutting mechanism; The method for detecting the position of the cutter of the paper cutting mechanism by the cutter state detection device is as follows: detecting the voltage of the position signal output by the detection signal output end; if the voltage of the position signal output by the signal output end is greater than V1, it is determined that the cutter is in the closed position; if the output voltage of the signal output end is between the second voltage value V2 and the third voltage value V3, it is determined that the cutter is in the open position; if the output voltage of the signal output end is less than V4, it is determined that the cutter is between the open position and the closed position; wherein V1, V2, V3, and V4 decrease in sequence, V1 = VCC - Ve1, V2 = Va + Ve2, Va = (R5 + R Q11 ) / (R M1 + R5 + R6 + R D1 + R Q11 ) * VCC, V3 = Va - Ve3, V4 = 0 + Ve4, Ve1, Ve2, Ve3, and Ve4 are respectively the set first error voltage value, second error voltage value, third error voltage value, and fourth error voltage value, VCC is the voltage at the power supply terminal, R5 and R6 are respectively the resistance values of the fifth resistor and the sixth resistor, R Q11 is the on-resistance between the collector and the emitter when the first phototransistor is on, R M1 is the on-resistance between the source and the drain when the first MOS transistor is on, R D1 is the on-resistance of the first diode.

7. The control method of a paper cutting mechanism according to claim 5 or 6, characterized in that: Ve1 and Ve4 are 0.3 volts, and Ve2 and Ve3 are 0.1 volts.

8. The control method of a paper cutting mechanism according to claim 4, characterized in that: The threshold time is 1 second.

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