Printer die bonding detection path

Abstract

The utility model discloses a printer die bonding detection circuit comprising a signal emission circuit, an input end of which is connected with a master control circuit, and an output end of which is connected with input ends of a photoelectric detection device and a feedback circuit; the output end of the feedback circuit is connected with the main control circuit; the output end of the photoelectric detection device is connected with the input end of the signal receiving circuit; the input end of the signal correction circuit is connected with the output end of the main control circuit, and the output end of the signal correction circuit is connected with the input end of the signal receiving circuit; the output end of the signal receiving circuit is connected with the input end of the master control circuit. The photoelectric detection device detects a second analog signal corresponding to the state of a film in the printer under the triggering of the first analog signal, and the signal receiving circuit receives the second analog signal and the third analog signal and outputs a fourth analog signal to the main control circuit, so that the effective and real-time detection of the film bonding condition is realized, and the detection efficiency is improved. The printer can be conveniently maintained in the first time, and the use efficiency of the printer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of printer film sticking detection, in particular to a printer film sticking detection circuit. Background Art

[0002] Thermal printers are widely used in life, especially in medical imaging, which can output medical images in the clinic, thus facilitating doctors' diagnosis and treatment. The traditional film transmission method is to use rubbing film feeding, which has the problem of film sticking and scratching, affecting the quality of the printed film. In addition, the friction force takes a long time to feed the film and has low work efficiency. For the situation of film sticking, the existing technology cannot detect it in time and make corresponding treatment, so when the thermal printer has a film sticking failure, it cannot be maintained in the first time, which reduces the efficiency of the thermal printer. Utility Model Content

[0003] Based on this, it is necessary to propose a printer sticking detection circuit to address the above problems.

[0004] A printer sticking detection circuit, comprising:

[0005] A signal transmitting circuit, whose input end is connected to the main control circuit, and whose output end is connected to the input end of the photoelectric detection device and the feedback circuit, is used to receive the first PWM signal output by the main control circuit, and convert the first PWM signal into a first analog signal and output it to the photoelectric detection device and the feedback circuit after amplification;

[0006] The feedback circuit, whose output end is connected to the main control circuit, is used to receive the first analog signal and output the first analog signal to the main control circuit;

[0007] The photoelectric detection device, the output end of which is connected to the input end of the signal receiving circuit, is used to receive the first analog signal and detect a second analog signal, the second analog signal corresponding to the state of the film in the printer;

[0008] A signal correction circuit, having an input end connected to the output end of the main control circuit, and an output end connected to the input end of the signal receiving circuit, for receiving the second PWM signal output by the main control circuit, and converting the second PWM signal into a third analog signal and then outputting it to the signal receiving circuit;

[0009] The signal receiving circuit has an output end connected to an input end of the main control circuit, and is used to receive the second analog signal and the third analog signal, and output a fourth analog signal to the main control circuit.

[0010] In one embodiment, the signal transmitting circuit includes:

[0011] a first third-order low-pass filter, whose input end is connected to the main control circuit, and whose output end is connected to the input end of the first amplifier circuit, and is used to receive the first PWM signal, and convert the first PWM signal into a first analog signal and then output it to the first amplifier circuit;

[0012] The first amplifier circuit has an output end connected to the input end of the photoelectric detection device and the feedback circuit, and is used to receive the first analog signal and amplify the first analog signal and output it to the photoelectric detection device and the feedback circuit.

[0013] In one embodiment, the signal receiving circuit includes:

[0014] a first first-order low-pass filter, whose input end is connected to the output end of the photoelectric detection device, and whose output end is connected to the input end of the second amplifier circuit, for receiving the second analog signal, filtering the second analog signal and outputting it to the second amplifier circuit;

[0015] The second amplifier circuit has an output end connected to the input end of the main control circuit, is used to receive the second analog signal and the third analog signal, and output a fourth analog signal to the main control circuit.

[0016] In one embodiment, the signal correction circuit comprises:

[0017] a second third-order low-pass filter, whose input end is connected to the output end of the main control circuit, and whose output end is connected to the input end of the third amplifier circuit, and is used for the second PWM signal output by the main control circuit, and converts the second PWM signal into a third analog signal and then outputs it to the third amplifier circuit;

[0018] The output end of the third amplifier circuit is connected to the input end of the signal receiving circuit, and is used to receive the third analog signal and output the third analog signal to the signal receiving circuit after amplifying the third analog signal.

[0019] In one embodiment,

[0020] The first third-order low-pass filter comprises: a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor and a third capacitor;

[0021] The first amplifying circuit comprises: a first operational amplifier and a triode;

[0022] One end of the first resistor is connected to the main control circuit, and the other end is connected to one end of the second resistor;

[0023] The other end of the second resistor is connected to one end of the third resistor;

[0024] The other end of the third resistor is connected to the non-inverting input end of the first operational amplifier;

[0025] One end of the first capacitor is connected to one end of the first resistor close to the second resistor, and the other end is grounded;

[0026] One end of the second capacitor is connected to one end of the second resistor close to the third resistor, and the other end is grounded;

[0027] One end of the third capacitor is connected to the non-inverting input terminal of the first operational amplifier, and the other end is grounded;

[0028] The output terminal of the first operational amplifier is connected to the base of the triode;

[0029] The collector of the triode is connected to the photoelectric detection device, and the emitter of the triode is connected to the feedback circuit.

[0030] In one embodiment,

[0031] The first first-order low-pass filter comprises: a fourth resistor and a fourth capacitor;

[0032] The second amplifying circuit comprises: a second operational amplifier, a fifth resistor and a sixth resistor;

[0033] One end of the fourth resistor is connected to the output end of the photoelectric detection device, and the other end is connected to the non-inverting input end of the second operational amplifier;

[0034] One end of the fourth capacitor is connected to the non-inverting input terminal of the second operational amplifier, and the other end is grounded;

[0035] The inverting input terminal of the second operational amplifier is connected to one end of the fifth resistor and one end of the sixth resistor, and the output terminal of the second operational amplifier is connected to the input terminal of the main control circuit;

[0036] The other end of the fifth resistor is connected to the output end of the signal correction circuit;

[0037] The other end of the sixth resistor is connected to the output end of the second operational amplifier.

[0038] In one embodiment,

[0039] The second third-order low-pass filter comprises: a seventh resistor, an eighth resistor, a ninth resistor, a fifth capacitor, a sixth capacitor and a seventh capacitor;

[0040] The third amplifying circuit comprises: a third operational amplifier;

[0041] One end of the seventh resistor is connected to the output end of the main control circuit, and the other end is connected to one end of the eighth resistor;

[0042] The other end of the eighth resistor is connected to one end of the ninth resistor;

[0043] The other end of the ninth resistor is connected to the non-inverting input end of the third operational amplifier;

[0044] One end of the fifth capacitor is connected to one end of the seventh resistor close to the eighth resistor, and the other end is grounded;

[0045] One end of the sixth capacitor is connected to one end of the eighth resistor close to the ninth resistor, and the other end is grounded;

[0046] The inverting input terminal and the output terminal of the third operational amplifier are both connected to the input terminal of the signal receiving circuit.

[0047] In one embodiment, the feedback circuit includes: a fourth operational amplifier, a tenth resistor and an eleventh resistor;

[0048] The non-inverting input terminal of the fourth operational amplifier is connected to the inverting input terminal of the first operational amplifier and the emitter of the triode; the output terminal of the fourth operational amplifier is connected to the main control circuit;

[0049] One end of the tenth resistor is connected to the emitter of the triode, and the other end is grounded;

[0050] The eleventh resistor is connected in parallel with the tenth resistor.

[0051] In one embodiment, the feedback circuit further includes: a twelfth resistor;

[0052] One end of the twelfth resistor is connected to the inverting input terminal of the fourth operational amplifier, and the other end of the twelfth resistor is connected to the output terminal of the fourth operational amplifier.

[0053] In one embodiment, the photoelectric detection device is a through-beam infrared photoelectric sensor.

[0054] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0055] The present application receives the first PWM signal output by the main control circuit through the signal transmitting circuit, and converts the first PWM signal into a first analog signal and outputs it to the photoelectric detection device and the feedback circuit after amplification; the feedback circuit receives the first analog signal and outputs the first analog signal to the main control circuit; the photoelectric detection device detects a second analog signal, and the second analog signal corresponds to the state of the film in the printer; the signal correction circuit receives the second PWM signal output by the main control circuit, and converts the second PWM signal into a third analog signal and outputs it to the signal receiving circuit; the signal receiving circuit receives the second analog signal and the third analog signal, and outputs a fourth analog signal to the main control circuit. The photoelectric detection device detects the second analog signal corresponding to the state of the film in the printer under the triggering of the first analog signal, and the signal receiving circuit receives the second analog signal and the third analog signal, and outputs the fourth analog signal to the main control circuit, so as to achieve effective and real-time detection of the film sticking situation, facilitate the maintenance of the printer in the first time, and improve the use efficiency of the printer. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0057] in:

[0058] Figure 1 A structural block diagram of a printer sticking detection circuit in one embodiment;

[0059] Figure 2 is a circuit diagram of a signal transmission circuit and a feedback circuit in one embodiment;

[0060] Figure 3 FIG. 1 is a circuit diagram of a signal receiving circuit and a signal correction circuit in one embodiment. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0062] Thermal printers are widely used in life, especially in medical imaging, which can output medical images clinically, thus facilitating doctors' diagnosis and making treatment more convenient. The traditional film transmission method is to use rubbing film feeding. This film feeding method may cause film sticking and scratching, which affects the quality of the printed film. In addition, the friction force takes a long time to feed the film and reduces the work efficiency. In the case of film sticking, the existing technology cannot detect it in time and make corresponding treatments, so when a thermal printer has a film sticking failure, it cannot be maintained in the first time, which reduces the efficiency of the thermal printer. In order to solve the above technical problems, the present application provides a printer film sticking detection circuit, such as Figure 1As shown, it includes: a signal transmitting circuit 10, a feedback circuit 20, a photoelectric detection device 50, a signal correction circuit 40 and a signal receiving circuit 30; wherein the input end of the signal transmitting circuit 10 is connected to the main control circuit, and the output end is connected to the photoelectric detection device 50 and the input end of the feedback circuit 20, for receiving the first PWM signal output by the main control circuit, and converting the first PWM signal into a first analog signal and amplifying it and outputting it to the photoelectric detection device 50 and the feedback circuit 20; the output end of the feedback circuit 20 is connected to the main control circuit, for receiving the first analog signal, and outputting the first analog signal to the main control circuit; the photoelectric detection device 5 The output end of the signal correction circuit 40 is connected to the input end of the main control circuit, and the output end is connected to the input end of the signal receiving circuit 30, for receiving the second PWM signal output by the main control circuit, and converting the second PWM signal into a third analog signal and outputting it to the signal receiving circuit 30; the output end of the signal receiving circuit 30 is connected to the input end of the main control circuit, for receiving the second analog signal and the third analog signal, and outputting a fourth analog signal to the main control circuit. The present application receives the first PWM signal output by the main control circuit through the signal transmitting circuit, and converts the first PWM signal into a first analog signal and outputs it to the photoelectric detection device and the feedback circuit after amplification; the feedback circuit receives the first analog signal and outputs the first analog signal to the main control circuit; the photoelectric detection device detects a second analog signal, and the second analog signal corresponds to the state of the film in the printer; the signal correction circuit receives the second PWM signal output by the main control circuit, and converts the second PWM signal into a third analog signal and outputs it to the signal receiving circuit; the signal receiving circuit receives the second analog signal and the third analog signal, and outputs a fourth analog signal to the main control circuit. The photoelectric detection device detects the second analog signal corresponding to the state of the film in the printer under the triggering of the first analog signal, and the signal receiving circuit receives the second analog signal and the third analog signal, and outputs the fourth analog signal to the main control circuit, so as to achieve effective and real-time detection of the film sticking situation, facilitate the maintenance of the printer in the first time, and improve the use efficiency of the printer.

[0063] In one embodiment, Figure 2As shown, the signal transmitting circuit 10 includes: a first third-order low-pass filter 101 and a first amplifier circuit 102, wherein the input end of the first third-order low-pass filter 101 is connected to the main control circuit, and the output end is connected to the input end of the first amplifier circuit 102, for receiving the first PWM signal, and converting the first PWM signal into a first analog signal and outputting it to the first amplifier circuit 102; the output end of the first amplifier circuit 102 is connected to the input end of the photoelectric detection device 50 and the feedback circuit 20, for receiving the first analog signal, and amplifying the first analog signal and outputting it to the photoelectric detection device 50 and the feedback circuit 20.

[0064] In one embodiment, Figure 3 As shown, the signal receiving circuit 30 includes: a first first-order low-pass filter 301 and a second amplifying circuit 302, wherein the input end of the first first-order low-pass filter 301 is connected to the output end of the photoelectric detection device 50, and the output end is connected to the input end of the second amplifying circuit 302, for receiving the second analog signal, and filtering the second analog signal and outputting it to the second amplifying circuit 302; the output end of the second amplifying circuit 302 is connected to the input end of the main control circuit, for receiving the second analog signal and the third analog signal, and outputting a fourth analog signal to the main control circuit.

[0065] In one embodiment, Figure 3 As shown, the signal correction circuit 40 includes: a second third-order low-pass filter 401 and a third amplifier circuit 402, wherein the input end of the second third-order low-pass filter 401 is connected to the output end of the main control circuit, and the output end is connected to the input end of the third amplifier circuit 402, which is used for the second PWM signal output by the main control circuit, and converts the second PWM signal into a third analog signal and outputs it to the third amplifier circuit 402; the output end of the third amplifier circuit 402 is connected to the input end of the signal receiving circuit 30, which is used to receive the third analog signal, and amplify the third analog signal and output it to the signal receiving circuit 30.

[0066] In one embodiment, Figure 2As shown, the first third-order low-pass filter 101 includes: a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2 and a third capacitor C3; the first amplifying circuit 102 includes: a first operational amplifier U1 and a transistor Q7; wherein one end of the first resistor R1 is connected to the main control circuit, and the other end is connected to one end of the second resistor R2; the other end of the second resistor R2 is connected to one end of the third resistor R3; the other end of the third resistor R3 is connected to the non-inverting input end of the first operational amplifier U1; One end of the first capacitor C1 is connected to one end of the first resistor R1 close to the second resistor R2, and the other end is grounded; one end of the second capacitor C2 is connected to one end of the second resistor R2 close to the third resistor R3, and the other end is grounded; one end of the third capacitor C3 is connected to the in-phase input end of the first operational amplifier U1, and the other end is grounded; the output end of the first operational amplifier U1 is connected to the base of the transistor Q7; the collector of the transistor Q7 is connected to the photoelectric detection device 50, and the emitter of the transistor Q7 is connected to the feedback circuit 20.

[0067] In one embodiment, Figure 3 As shown, the first first-order low-pass filter 301 includes: a fourth resistor R9 and a fourth capacitor C5; the second amplifying circuit 302 includes: a second operational amplifier U3, a fifth resistor R10 and a sixth resistor R11; wherein, one end of the fourth resistor R9 is connected to the output end of the photoelectric detection device 50, and the other end is connected to the in-phase input end of the second operational amplifier U3; one end of the fourth capacitor C5 is connected to the in-phase input end of the second operational amplifier U3, and the other end is grounded; the inverting input end of the second operational amplifier U3 is connected to one end of the fifth resistor R10 and one end of the sixth resistor R11, and the output end of the second operational amplifier U3 is connected to the input end of the main control circuit; the other end of the fifth resistor R10 is connected to the output end of the signal correction circuit 40; the other end of the sixth resistor R11 is connected to the output end of the second operational amplifier U3.

[0068] In one embodiment, Figure 3As shown, the second third-order low-pass filter 401 includes: a seventh resistor R12, an eighth resistor R13, a ninth resistor R14, a fifth capacitor C7, a sixth capacitor C8 and a seventh capacitor C9; the third amplifying circuit 402 includes: a third operational amplifier U4; wherein one end of the seventh resistor R12 is connected to the output end of the main control circuit, and the other end is connected to one end of the eighth resistor R13; the other end of the eighth resistor R13 is connected to one end of the ninth resistor R14; the other end of the ninth resistor R14 is connected to the in-phase input end of the third operational amplifier U4; one end of the fifth capacitor C7 is connected to one end of the seventh resistor R12 close to the eighth resistor R13, and the other end is grounded; one end of the sixth capacitor C8 is connected to one end of the eighth resistor R13 close to the ninth resistor R14, and the other end is grounded; the inverting input end and the output end of the third operational amplifier U4 are both connected to the input end of the signal receiving circuit 30.

[0069] In one embodiment, Figure 2 As shown, the feedback circuit 20 includes: a fourth operational amplifier U2, a tenth resistor R6 and an eleventh resistor R7; wherein the non-inverting input terminal of the fourth operational amplifier U2 is connected to the inverting input terminal of the first operational amplifier U1 and the emitter of the triode Q7; the output terminal of the fourth operational amplifier U2 is connected to the main control circuit; one end of the tenth resistor R6 is connected to the emitter of the triode Q7, and the other end is grounded; the eleventh resistor R7 is connected in parallel with the tenth resistor R6.

[0070] In one embodiment, Figure 2 As shown, the feedback circuit 20 further includes: a twelfth resistor R5; wherein one end of the twelfth resistor R5 is connected to the inverting input end of the fourth operational amplifier U2, and the other end is connected to the output end of the fourth operational amplifier U2.

[0071] In one embodiment, the photoelectric detection device 50 is a through-beam infrared photoelectric sensor.

[0072] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A printer sticking detection circuit, characterized in that: include: A signal transmitting circuit, whose input end is connected to the main control circuit, and whose output end is connected to the input end of the photoelectric detection device and the feedback circuit, is used to receive the first PWM signal output by the main control circuit, and convert the first PWM signal into a first analog signal and output it to the photoelectric detection device and the feedback circuit after amplification; The feedback circuit, whose output end is connected to the main control circuit, is used to receive the first analog signal and output the first analog signal to the main control circuit; The photoelectric detection device, the output end of which is connected to the input end of the signal receiving circuit, is used to receive the first analog signal and detect a second analog signal, the second analog signal corresponding to the state of the film in the printer; A signal correction circuit, having an input end connected to the output end of the main control circuit, and an output end connected to the input end of the signal receiving circuit, for receiving the second PWM signal output by the main control circuit, and converting the second PWM signal into a third analog signal and then outputting it to the signal receiving circuit; The signal receiving circuit has an output end connected to an input end of the main control circuit, and is used to receive the second analog signal and the third analog signal, and output a fourth analog signal to the main control circuit.

2. The printer sticking detection circuit according to claim 1, characterized in that: The signal transmitting circuit comprises: a first third-order low-pass filter, whose input end is connected to the main control circuit, and whose output end is connected to the input end of the first amplifier circuit, and is used to receive the first PWM signal, and convert the first PWM signal into a first analog signal and then output it to the first amplifier circuit; The first amplifier circuit has an output end connected to the input end of the photoelectric detection device and the feedback circuit, and is used to receive the first analog signal and amplify the first analog signal and output it to the photoelectric detection device and the feedback circuit.

3. The printer sticking detection circuit according to claim 1, characterized in that: The signal receiving circuit comprises: a first first-order low-pass filter, whose input end is connected to the output end of the photoelectric detection device, and whose output end is connected to the input end of the second amplifier circuit, for receiving the second analog signal, filtering the second analog signal and outputting it to the second amplifier circuit; The second amplifier circuit has an output end connected to the input end of the main control circuit, is used to receive the second analog signal and the third analog signal, and output a fourth analog signal to the main control circuit.

4. The printer sticking detection circuit according to claim 1, characterized in that: The signal correction circuit comprises: a second third-order low-pass filter, whose input end is connected to the output end of the main control circuit, and whose output end is connected to the input end of the third amplifier circuit, and is used for the second PWM signal output by the main control circuit, and converts the second PWM signal into a third analog signal and then outputs it to the third amplifier circuit; The output end of the third amplifier circuit is connected to the input end of the signal receiving circuit, and is used to receive the third analog signal and output the third analog signal to the signal receiving circuit after amplifying the third analog signal.

5. The printer sticking detection circuit according to claim 2, characterized in that: The first third-order low-pass filter comprises: a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor and a third capacitor; The first amplifying circuit comprises: a first operational amplifier and a triode; One end of the first resistor is connected to the main control circuit, and the other end is connected to one end of the second resistor; The other end of the second resistor is connected to one end of the third resistor; The other end of the third resistor is connected to the non-inverting input end of the first operational amplifier; One end of the first capacitor is connected to one end of the first resistor close to the second resistor, and the other end is grounded; One end of the second capacitor is connected to one end of the second resistor close to the third resistor, and the other end is grounded; One end of the third capacitor is connected to the non-inverting input terminal of the first operational amplifier, and the other end is grounded; The output terminal of the first operational amplifier is connected to the base of the triode; The collector of the triode is connected to the photoelectric detection device, and the emitter of the triode is connected to the feedback circuit.

6. The printer sticking detection circuit according to claim 3, characterized in that: The first first-order low-pass filter comprises: a fourth resistor and a fourth capacitor; The second amplifying circuit comprises: a second operational amplifier, a fifth resistor and a sixth resistor; One end of the fourth resistor is connected to the output end of the photoelectric detection device, and the other end is connected to the non-inverting input end of the second operational amplifier; One end of the fourth capacitor is connected to the non-inverting input terminal of the second operational amplifier, and the other end is grounded; The inverting input terminal of the second operational amplifier is connected to one end of the fifth resistor and one end of the sixth resistor, and the output terminal of the second operational amplifier is connected to the input terminal of the main control circuit; The other end of the fifth resistor is connected to the output end of the signal correction circuit; The other end of the sixth resistor is connected to the output end of the second operational amplifier.

7. The printer sticking detection circuit according to claim 4, characterized in that: The second third-order low-pass filter comprises: a seventh resistor, an eighth resistor, a ninth resistor, a fifth capacitor, a sixth capacitor and a seventh capacitor; The third amplifying circuit comprises: a third operational amplifier; One end of the seventh resistor is connected to the output end of the main control circuit, and the other end is connected to one end of the eighth resistor; The other end of the eighth resistor is connected to one end of the ninth resistor; The other end of the ninth resistor is connected to the non-inverting input end of the third operational amplifier; One end of the fifth capacitor is connected to one end of the seventh resistor close to the eighth resistor, and the other end is grounded; One end of the sixth capacitor is connected to one end of the eighth resistor close to the ninth resistor, and the other end is grounded; The inverting input terminal and the output terminal of the third operational amplifier are both connected to the input terminal of the signal receiving circuit.

8. The printer sticking detection circuit according to claim 5, characterized in that: The feedback circuit comprises: a fourth operational amplifier, a tenth resistor and an eleventh resistor; The non-inverting input terminal of the fourth operational amplifier is connected to the inverting input terminal of the first operational amplifier and the emitter of the triode; the output terminal of the fourth operational amplifier is connected to the main control circuit; One end of the tenth resistor is connected to the emitter of the triode, and the other end is grounded; The eleventh resistor is connected in parallel with the tenth resistor.

9. The printer sticking detection circuit according to claim 8, characterized in that: The feedback circuit further includes: a twelfth resistor; One end of the twelfth resistor is connected to the inverting input terminal of the fourth operational amplifier, and the other end of the twelfth resistor is connected to the output terminal of the fourth operational amplifier.

10. The printer sticking detection circuit according to claim 1, characterized in that: The photoelectric detection device is a directed infrared photoelectric sensor.

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