AC signal control circuit and device

Abstract

The present invention relates to an AC signal control circuit and device, including a control output circuit and a control input circuit; the control output circuit includes a first control terminal, a second control terminal, an AC positive half-wave generating circuit, an AC negative half-wave generating circuit and an AC signal output terminal; the control input circuit includes a first signal output terminal, a second signal output terminal, a first signal conversion circuit, a second signal conversion circuit and an AC signal input terminal. The present invention modulates the AC power through the control output circuit to generate an AC control signal and sends it to an external device, and the external device receives the AC control signal and demodulates the signal through the control input circuit, thereby realizing AC signal control communication between devices. The method is low in cost, easy to control and debug, and has good anti-interference effect.

Description

Technical Field

[0001] The present invention relates to the field of signal transmission, and in particular to an alternating current signal control circuit and device. Background Art

[0002] At present, control devices mostly use network cables, RS485, wireless and other communication protocols, which are powerful and widely used. However, the hardware cost of using such communication protocols is high, and special chips need to be installed in the equipment, and the configuration of the communication protocols is relatively complicated. Summary of the invention

[0003] Based on this, the present invention provides an AC signal control circuit and device, which generates a control signal through AC power, has low cost, is easy to control and debug, and has good anti-interference effect.

[0004] The present invention is achieved through the following scheme:

[0005] In a first aspect, the present invention provides an alternating current signal control circuit, comprising:

[0006] Control output circuit and control input circuit;

[0007] The control output circuit includes a first control terminal, a second control terminal, an AC positive half-wave generating circuit, an AC negative half-wave generating circuit and an AC signal output terminal, wherein the AC signal output terminal is used to output a signal to an external device;

[0008] The AC positive half-wave generating circuit is connected to the first control end, and is used to generate an AC positive half-wave signal according to the signal of the first control end, and output it to the AC signal output end; the AC negative half-wave generating circuit is connected to the second control end, and is used to generate an AC negative half-wave signal according to the signal of the second control end, and output it to the AC signal output end;

[0009] The control input circuit includes a first signal output terminal, a second signal output terminal, a first signal conversion circuit, a second signal conversion circuit and an AC signal input terminal, wherein the AC signal input terminal is used to receive a signal output by the AC signal output terminal of an external device;

[0010] The first signal conversion circuit is connected to the neutral line, the AC signal input terminal and the first signal output terminal respectively, and when the signal at the AC signal input terminal is an AC positive half-wave, the first signal conversion circuit outputs a high level to the first signal output terminal; the second signal conversion circuit is connected to the neutral line, the AC signal input terminal and the second signal output terminal respectively, and when the signal at the AC signal input terminal is an AC negative half-wave, the second signal conversion circuit outputs a high level to the second signal output terminal.

[0011] Further, the AC positive half-wave generating circuit of the control output circuit includes: a first isolating switch, an AC power input terminal and a first unidirectional conducting element; the first isolating switch includes a first driving element and a first controlled element, the current input terminal of the first driving element is connected to the first control terminal, the current output terminal of the first driving element is grounded, the current input terminal of the first controlled element is connected to the AC power input terminal, the current output terminal of the first controlled element is connected to the AC signal output terminal through the first unidirectional conducting element, and when the first driving element is turned on, the first controlled element is driven to be turned on;

[0012] The AC negative half-wave generating circuit of the control output circuit includes: a second isolating switch, an AC power supply input terminal and a second unidirectional conducting element; the second isolating switch includes a second driving element and a second controlled element, the current input terminal of the second driving element is connected to the second control terminal, the current output terminal of the second driving element is grounded, the current input terminal of the second controlled element is connected to the AC power supply input terminal, the current output terminal of the second controlled element is connected to the AC signal output terminal through the second unidirectional conducting element, and when the second driving element is turned on, the second controlled element is driven to be turned on.

[0013] Further, the first isolating switch includes a first optical coupler, the first driving element includes a first light emitting diode, and the first controlled element includes a first phototransistor; the current input end of the first light emitting diode is connected to the first control end, the current output end of the first light emitting diode is grounded, the current input end of the first phototransistor is connected to the AC power input end, the current output end of the first phototransistor is connected to the AC power supply input end through the first unidirectional conductive element, and when the first light emitting diode is turned on, the first phototransistor is driven to be turned on;

[0014] The second isolating switch includes a second optocoupler, the second driving element includes a second light-emitting diode, and the second controlled element includes a second phototransistor; the current input end of the second light-emitting diode is connected to the second control end, the current output end of the second light-emitting diode is grounded, the current input end of the second phototransistor is connected to the AC power input end, and the current output end of the second phototransistor is connected to the AC signal output end through the second unidirectional conductive element. When the second light-emitting diode is turned on, the second phototransistor is driven to be turned on.

[0015] Further, the first unidirectional conductive element comprises a first diode, one end of the first diode is connected to the current output end of the first phototransistor, and the other end of the first diode is connected to the AC signal output end;

[0016] The second unidirectional conducting element comprises a second diode, one end of the second diode is connected to the current output end of the second phototransistor, and the other end of the second diode is connected to the AC signal output end.

[0017] Further, the first signal conversion circuit of the control input circuit includes: a third isolating switch, a voltage input terminal and a third unidirectional conductive element; the third isolating switch includes a third driving element and a third controlled element, the current input terminal of the third driving element is connected to the AC signal input terminal through the third unidirectional conductive element, the current output terminal of the third driving element is connected to the neutral line, the current input terminal of the third controlled element is connected to the voltage input terminal and the first signal output terminal, the current output terminal of the third controlled element is grounded, and when the third driving element is turned on, the third controlled element is driven to turn on;

[0018] The second signal conversion circuit of the control input circuit includes: a fourth isolating switch, a voltage input terminal and a fourth unidirectional conducting element; the fourth isolating switch includes a fourth driving element and a fourth controlled element, the current input terminal of the fourth driving element is connected to the neutral line through the fourth unidirectional conducting element, the current output terminal of the fourth controlled element is connected to the AC signal input terminal, the current input terminal of the fourth controlled element is connected to the voltage input terminal and the second signal output terminal, the current output terminal of the fourth controlled element is grounded, and when the fourth driving element is turned on, the fourth controlled element is driven to turn on.

[0019] Further, the third isolating switch includes a third optical coupler, the third driving element includes a third light-emitting diode, and the third controlled element includes a third phototransistor; the current input end of the third light-emitting diode is connected to the AC signal input end through the third unidirectional conductive element, the current output end of the third light-emitting diode is connected to the neutral line, the current input end of the third phototransistor is connected to the voltage input end and the first signal output end, the current output end of the third phototransistor is grounded, and when the third light-emitting diode is turned on, the third phototransistor is driven to be turned on;

[0020] The fourth isolating switch includes a fourth optocoupler, the fourth driving element includes a fourth light-emitting diode, and the fourth controlled element includes a fourth phototransistor; the current input end of the fourth light-emitting diode is connected to the neutral line through the fourth unidirectional conductive element, the current output end of the fourth light-emitting diode is connected to the AC signal input end, the current input end of the fourth phototransistor is connected to the voltage input end and the second signal output end, the current output end of the fourth phototransistor is grounded, and when the fourth light-emitting diode is turned on, the fourth phototransistor is driven to be turned on.

[0021] Further, the third unidirectional conducting element comprises a third diode, one end of the third diode is connected to the AC signal input end, and the other end of the third diode is connected to the current input end of the third light emitting diode;

[0022] The fourth unidirectional conducting element comprises a fourth diode, one end of the fourth diode is connected to the neutral line, and the other end of the fourth diode is connected to the current input end of the fourth light emitting diode.

[0023] Furthermore, the control output circuit also includes a first current limiting resistor, a second current limiting resistor and an overcurrent protection device;

[0024] One end of the first current limiting resistor is connected to the first control end, and the other end of the first current limiting resistor is connected to the current input end of the first light-emitting diode; one end of the second current limiting resistor is connected to the second control end, and the other end of the second current limiting resistor is connected to the current input end of the second light-emitting diode; one end of the overcurrent protection device is connected to the first diode and the second diode, and the other end is connected to the AC signal output end;

[0025] The control input circuit also includes a third current limiting resistor, a fourth current limiting resistor, a first AC current limiting resistor and a second AC current limiting resistor;

[0026] One end of the third current limiting resistor is connected to the current input end of the third phototransistor, and the other end of the third current limiting resistor is connected to the first signal output end; one end of the first AC current limiting resistor is connected to the AC signal input end, and the other end is connected to the third diode; one end of the fourth current limiting resistor is connected to the current input end of the fourth phototransistor, and the other end of the fourth current limiting resistor is connected to the second signal output end; one end of the second AC current limiting resistor is connected to the neutral line, and the other end is connected to the fourth diode.

[0027] Further, it also includes a first pull-up resistor and a second pull-up resistor;

[0028] One end of the first pull-up resistor is connected to the voltage input end, and the other end of the first pull-up resistor is connected to the current input end of the third phototransistor;

[0029] One end of the second pull-up resistor is connected to the voltage input end, and the other end of the second pull-up resistor is connected to the current input end of the fourth phototransistor.

[0030] In a second aspect, the present invention provides an AC signal control device, comprising an AC signal control circuit as described in the first aspect.

[0031] The present invention modulates alternating current by controlling an output circuit to generate an alternating current control signal, and sends the signal to an external device. The external device receives the alternating current control signal and demodulates the signal by controlling an input circuit to parse the control command therein, thereby realizing alternating current signal control communication between devices. The method is low in cost, easy to control and debug, and has good anti-interference effect.

[0032] In order to more clearly illustrate the embodiments of the present application 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 present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A topological relationship diagram of an AC signal control circuit provided in an embodiment of the present application;

[0034] Figure 2 A circuit diagram of a control output circuit of an AC signal control circuit provided in an embodiment of the present application;

[0035] Figure 3 A circuit diagram of a control input circuit of an AC signal control circuit provided in an embodiment of the present application;

[0036] Figure 4 An application scenario diagram of an alternating current signal control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0038] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.

[0039] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0040] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar human bodies, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0041] In addition, in the description of this application, unless otherwise specified, "multiple" means two or more. "And / or" describes the association relationship of the associated human bodies, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated human bodies before and after are in an "or" relationship.

[0042] In view of the technical problems in the background technology, the present application provides an AC signal control circuit, including a control output circuit and a control input circuit. Figure 1 As shown, Figure 1 A topological diagram of an AC signal control circuit provided in this application.

[0043] The control output circuit includes a first control terminal 110, a second control terminal 210, an AC positive half-wave generating circuit 100, an AC negative half-wave generating circuit 200 and an AC signal output terminal 301, wherein the AC signal output terminal 301 is used to output a signal to an external device; the AC positive half-wave generating circuit 100 is connected to the first control terminal 110, and is used to generate an AC positive half-wave signal according to the signal of the first control terminal 110, and output it to the AC signal output terminal 301; the AC negative half-wave generating circuit 200 is connected to the second control terminal 210, and is used to generate an AC negative half-wave signal according to the signal of the second control terminal 210, and output it to the AC signal output terminal 310.

[0044] The control input circuit includes a first signal output terminal 601, a second signal output terminal 602, a first signal conversion circuit 300, a second signal conversion circuit 400 and an AC signal input terminal 502, wherein the AC signal input terminal 502 is used to receive a signal output by the AC signal output terminal 501 of an external device; the first signal conversion circuit is respectively connected to the neutral line N, the AC signal input terminal 502 and the first signal output terminal 601, and when the signal of the AC signal input terminal 502 is an AC positive half-wave, the first signal conversion circuit 300 outputs a high level to the first signal output terminal 601; the second signal conversion circuit 400 is respectively connected to the neutral line N, the AC signal input terminal 502 and the second signal output terminal 602, and when the signal of the AC signal input terminal 502 is an AC negative half-wave, the second signal conversion circuit 400 outputs a high level to the second signal output terminal 602.

[0045] Specifically, the AC positive half-wave generating circuit 100 of the control output circuit includes: a first isolating switch 101, an AC power supply input terminal L and a first unidirectional conducting element 102; the first isolating switch 101 includes a first driving element and a first controlled element, the current input terminal of the first driving element is connected to the first control terminal 110, the current output terminal of the first driving element is grounded, the current input terminal of the first controlled element is connected to the AC power supply input terminal L, the current output terminal of the first controlled element is connected to the AC signal output terminal 501 through the first unidirectional conducting element 102, and when the first driving element 102 is turned on, the first controlled element is driven to be turned on.

[0046] The AC negative half-wave generating circuit 200 of the control output circuit includes: a second isolating switch 201, an AC power input terminal L and a second unidirectional conducting element 202; the second isolating switch 201 includes a second driving element and a second controlled element, the current input terminal of the second driving element is connected to the second control terminal 210, the current output terminal of the second driving element is grounded, the current input terminal of the second controlled element is connected to the AC power input terminal L, the current output terminal of the second controlled element is connected to the AC signal output terminal 501 through the second unidirectional conducting element 202, and when the second driving element 202 is turned on, the second controlled element is driven to be turned on.

[0047] The first signal conversion circuit 300 of the control input circuit includes: a third isolating switch 301, a voltage input terminal 303 and a third unidirectional conducting element 302; the third isolating switch 301 includes a third driving element and a third controlled element, the current input terminal of the third driving element is connected to the AC signal input terminal 502 through the third unidirectional conducting element 302, the current output terminal of the third driving element is connected to the neutral line N, the current input terminal of the third controlled element is connected to the voltage input terminal 303 and the first signal output terminal 601, the current output terminal of the third controlled element is grounded, and when the third driving element is turned on, the third controlled element is driven to be turned on.

[0048] The second signal conversion circuit 400 of the control input circuit includes: a fourth isolating switch 401, a voltage input terminal 403 and a fourth unidirectional conducting element 402; the fourth isolating switch 401 includes a fourth driving element and a fourth controlled element, the current input terminal of the fourth driving element is connected to the neutral line N through the fourth unidirectional conducting element 402, the current output terminal of the fourth controlled element is connected to the AC signal input terminal 502, the current input terminal of the fourth controlled element is connected to the voltage input terminal 403 and the second signal output terminal 602, the current output terminal of the fourth controlled element is grounded, and when the fourth driving element is turned on, the fourth controlled element is driven to be turned on.

[0049] In a preferred embodiment, Figure 2 and Figure 3 As shown, Figure 2 A circuit diagram of a control output circuit of an AC signal control circuit provided in an embodiment of the present application; Figure 3 A circuit diagram of a control input circuit of an AC signal control circuit provided in an embodiment of the present application.

[0050] The first control terminal 110 is the control terminal of the LCO-P chip, the first isolating switch 101 is an optocoupler B2, the first driving element is a light emitting diode in the optocoupler B2, the first controlled element is a phototransistor in the optocoupler B2, and the first unidirectional conducting element 102 is a diode D2; the current input terminal of the light emitting diode is connected to the control terminal of the LCO-P chip, the current output terminal of the light emitting diode is grounded, the current input terminal of the phototransistor is connected to the AC power input terminal L, and the current output terminal of the phototransistor is connected to the AC signal output terminal LC OUT through the diode D2. When the light emitting diode receives a conduction signal from the control terminal of the LCO-P chip, the phototransistor is driven to conduct.

[0051] The second control end 210 is the control end of the LCO-N chip, the second isolating switch 201 is an optocoupler B3, the second driving element is a light emitting diode in the optocoupler B3, the second controlled element is a phototransistor in the optocoupler B3, and the second unidirectional conducting element 202 is a diode D3; the current input end of the light emitting diode is connected to the control end of the LCO-N chip, the current output end of the light emitting diode is grounded, the current input end of the phototransistor is connected to the AC power input end L, and the current output end of the phototransistor is connected to the AC signal output end LC OUT through the diode D3. When the light emitting diode receives a conduction signal from the control end of the LCO-N chip, the phototransistor is driven to conduct.

[0052] The first signal output terminal 601 is the LCI-P chip control signal detection terminal, the voltage input terminal 303 is a 3.3V voltage input terminal, the third isolation switch 301 includes an optocoupler B1, the third driving element is a light emitting diode in the optocoupler B1, the third controlled element is a phototransistor in the optocoupler B3, and the third unidirectional conductive element 302 is a diode D1; the current input terminal of the light emitting diode is connected to the AC signal input terminal LC IN through the diode D1, the current output terminal of the light emitting diode is connected to the neutral line N, the current input terminal of the phototransistor is connected to the 3.3V voltage input terminal and the LCI-P chip control signal detection terminal, the current output terminal of the phototransistor is grounded, and when the light emitting diode receives a conduction signal from the AC signal input terminal LC IN, the phototransistor is driven to conduct.

[0053] The second signal output terminal 602 is the LCI-N chip control signal detection terminal, the voltage input terminal 403 is a 3.3V voltage input terminal, the fourth isolation switch 401 includes an optocoupler B4, the fourth driving element is a light-emitting diode in the optocoupler B4, the fourth controlled element includes a phototransistor in the optocoupler B4, and the third unidirectional conductive element 402 is a diode D4; the current input terminal of the light-emitting diode is connected to the neutral line N through the diode D4, the current output terminal of the light-emitting diode is connected to the AC signal input terminal LC IN, the current input terminal of the phototransistor is connected to the 3.3V voltage input terminal and the LCI-N chip control signal detection terminal, and the current output terminal of the phototransistor is grounded. When the light-emitting diode receives a conduction signal from the AC signal input terminal LC IN, the fourth phototransistor is driven to conduct.

[0054] In a preferred embodiment, Figure 2 and Figure 3As shown, the control output circuit also includes a first current limiting resistor R4, a second current limiting resistor R6 and an overcurrent protection device F1; one end of the first current limiting resistor R4 is connected to the control end of the LCO-P chip, and the other end of the first current limiting resistor is connected to the current input end of the light-emitting diode in the optocoupler B2; one end of the second current limiting resistor R6 is connected to the control end of the LCO-N chip, and the other end of the second current limiting resistor R6 is connected to the current input end of the light-emitting diode in the optocoupler B2; one end of the overcurrent protection device F1 is connected to the diode D2 and the diode D3, and the other end is connected to the AC signal output end LC OUT.

[0055] The control input circuit also includes a third current limiting resistor R2, a fourth current limiting resistor R7, a first AC current limiting resistor R3 and a second AC current limiting resistor R8; one end of the third current limiting resistor R3 is connected to the current input end of the photosensitive triode in the optocoupler B1, and the other end of the third current limiting resistor R3 is connected to the control signal detection end of the LCI-P chip; one end of the first AC current limiting resistor R3 is connected to the AC signal input end LC IN, and the other end is connected to the diode D1; one end of the fourth current limiting resistor R7 is connected to the current input end of the photosensitive triode in the optocoupler B4, and the other end of the fourth current limiting resistor R7 is connected to the control signal detection end of the LCI-N chip; one end of the second AC current limiting resistor R8 is connected to the neutral line N, and the other end is connected to the diode D4.

[0056] The control input circuit also includes a first pull-up resistor R1 and a second pull-up resistor R5; one end of the first pull-up resistor R1 is connected to the 3.3V voltage input end, and the other end of the first pull-up resistor R1 is connected to the current input end of the phototransistor in the optocoupler B1; one end of the second pull-up resistor R5 is connected to the 3.3V voltage input end, and the other end of the second pull-up resistor R5 is connected to the current input end of the phototransistor in the optocoupler B4.

[0057] The specific working principle of the embodiment of the present invention is:

[0058] The first control end and the second control end of the control output circuit are connected to the control chip, and respectively receive the positive half-cycle control signal and the negative half-cycle control signal of the AC signal sent by the control chip end. The first optocoupler and the second optocoupler receive the response control signal and act as an isolation switch to modulate the positive half-cycle and the negative half-cycle of the AC input from the AC input end respectively. The first unidirectional conductive element and the second unidirectional conductive element filter the modulated signal and pass it through the overcurrent protection device as overcurrent output protection. Finally, the modulation of the AC signal is completed and output through the AC signal output end.

[0059] The AC signal input end of the control input circuit receives the modulated AC signal output by the AC signal output end of the control output circuit and demodulates it. The third optical coupler and the fourth optical coupler receive the AC control signal sent by the AC signal input end after being filtered by the third unidirectional conductive element and the fourth unidirectional conductive element, and act as an isolation switch to convert the AC control signal therein into a high or low level and output it to the control signal detection chip through the first signal output end and the second signal output end.

[0060] By analyzing the AC control signal through the control signal detection chip, the corresponding control instruction can be obtained, and the control instruction can be sent to the device to control the device. The specific control instructions analyzed can be shown in the following table:

[0061]

[0062]

[0063] The present invention modulates alternating current by controlling an output circuit to generate an alternating current control signal, and sends the signal to an external device. The external device receives the alternating current control signal and demodulates the signal by controlling an input circuit to parse the control command therein, thereby realizing alternating current signal control communication between devices. The method is low in cost, easy to control and debug, and has good anti-interference effect.

[0064] An embodiment of the present application also provides an AC signal control device, comprising an AC signal control circuit as described in any of the above embodiments.

[0065] Specific as Figure 4 As shown, Figure 4An application scenario of the AC signal control device is given. Among them, the non-intelligent control panel and the intelligent middleware are both AC signal control devices provided by the embodiment of the present application, and the intelligent middleware includes a wireless communication module, which can obtain wireless signals from the gateway. The wireless signal includes a series of control instructions for floor heating. The control chip in the intelligent middleware modulates the AC signal according to the instruction and generates an AC control signal and sends it to the non-intelligent control panel through the control output circuit. The control input circuit of the non-intelligent control panel demodulates the AC control signal and obtains it by the control signal detection chip; the control output circuit of the non-intelligent control panel generates direct control information for the floor heating device according to the information obtained by the control signal detection chip, and the control chip of the non-intelligent control panel modulates the AC signal according to the direct control information and generates an AC control signal for directly controlling the floor heating and sends it to the intelligent middleware through the control output circuit. The intelligent middleware forwards the acquired AC control signal for directly controlling the floor heating to the floor heating device, thereby realizing the control of the floor heating device. The intelligent middleware and the non-intelligent control panel generate control signals by modulating the AC, which ensures low cost, convenient control and debugging, and good anti-interference effect.

[0066] It should be understood that the embodiments of the present application are not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the embodiments of the present application is limited only by the appended claims.

[0067] The above-mentioned embodiments only express several implementation methods of the embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the embodiments of the present application, and these all belong to the protection scope of the embodiments of the present application.

Claims

1. An AC signal control circuit, characterized in that: include: Control output circuit and control input circuit; The control output circuit includes a first control terminal, a second control terminal, an AC positive half-wave generating circuit, an AC negative half-wave generating circuit and an AC signal output terminal, wherein the AC signal output terminal is used to output a signal to an external device; The AC positive half-wave generating circuit is connected to the first control terminal, and is used to generate an AC positive half-wave signal according to a signal from the first control terminal, and output the signal to the AC signal output terminal; The AC negative half-wave generating circuit is connected to the second control terminal, and is used to generate an AC negative half-wave signal according to a signal of the second control terminal, and output the signal to the AC signal output terminal; The control input circuit includes a first signal output terminal, a second signal output terminal, a first signal conversion circuit, a second signal conversion circuit and an AC signal input terminal, wherein the AC signal input terminal is used to receive a signal output by the AC signal output terminal of an external device; The first signal conversion circuit is respectively connected to the neutral line, the AC signal input terminal and the first signal output terminal, and when the signal at the AC signal input terminal is an AC positive half-wave, the first signal conversion circuit outputs a high level to the first signal output terminal; the second signal conversion circuit is respectively connected to the neutral line, the AC signal input terminal and the second signal output terminal, and when the signal at the AC signal input terminal is an AC negative half-wave, the second signal conversion circuit outputs a high level to the second signal output terminal; The AC positive half-wave generating circuit of the control output circuit comprises: a first isolating switch, an AC power input terminal and a first unidirectional conducting element; the first isolating switch comprises a first driving element and a first controlled element, the current input terminal of the first driving element is connected to the first control terminal, the current output terminal of the first driving element is grounded, the current input terminal of the first controlled element is connected to the AC power input terminal, the current output terminal of the first controlled element is connected to the AC signal output terminal through the first unidirectional conducting element, and when the first driving element is turned on, the first controlled element is driven to be turned on; The AC negative half-wave generating circuit of the control output circuit includes: a second isolating switch, an AC power supply input terminal and a second unidirectional conducting element; the second isolating switch includes a second driving element and a second controlled element, the current input terminal of the second driving element is connected to the second control terminal, the current output terminal of the second driving element is grounded, the current input terminal of the second controlled element is connected to the AC power supply input terminal, the current output terminal of the second controlled element is connected to the AC signal output terminal through the second unidirectional conducting element, and when the second driving element is turned on, the second controlled element is driven to be turned on.

2. The AC signal control circuit according to claim 1, characterized in that: The first isolating switch includes a first optical coupler, the first driving element includes a first light emitting diode, and the first controlled element includes a first phototransistor; a current input end of the first light emitting diode is connected to the first control end, a current output end of the first light emitting diode is grounded, a current input end of the first phototransistor is connected to the AC power input end, and a current output end of the first phototransistor is connected to the AC power output end through the first unidirectional conducting element, and when the first light emitting diode is turned on, the first phototransistor is driven to be turned on; The second isolating switch includes a second optical coupler, the second driving element includes a second light emitting diode, and the second controlled element includes a second phototransistor; The current input end of the second light-emitting diode is connected to the second control end, the current output end of the second light-emitting diode is grounded, the current input end of the second phototransistor is connected to the AC power input end, the current output end of the second phototransistor is connected to the AC signal output end through the second unidirectional conductive element, and when the second light-emitting diode is turned on, the second phototransistor is driven to be turned on.

3. The AC signal control circuit according to claim 2, characterized in that: The first unidirectional conductive element comprises a first diode, one end of the first diode is connected to the current output end of the first phototransistor, and the other end of the first diode is connected to the AC signal output end; The second unidirectional conducting element comprises a second diode, one end of the second diode is connected to the current output end of the second phototransistor, and the other end of the second diode is connected to the AC signal output end.

4. The AC signal control circuit according to claim 3, characterized in that: The first signal conversion circuit of the control input circuit includes: a third isolating switch, a voltage input terminal and a third unidirectional conductive element; the third isolating switch includes a third driving element and a third controlled element, the current input terminal of the third driving element is connected to the AC signal input terminal through the third unidirectional conductive element, the current output terminal of the third driving element is connected to the neutral line, the current input terminal of the third controlled element is connected to the voltage input terminal and the first signal output terminal, the current output terminal of the third controlled element is grounded, and when the third driving element is turned on, the third controlled element is driven to turn on; The second signal conversion circuit of the control input circuit includes: a fourth isolating switch, a voltage input terminal and a fourth unidirectional conducting element; the fourth isolating switch includes a fourth driving element and a fourth controlled element, the current input terminal of the fourth driving element is connected to the neutral line through the fourth unidirectional conducting element, the current output terminal of the fourth controlled element is connected to the AC signal input terminal, the current input terminal of the fourth controlled element is connected to the voltage input terminal and the second signal output terminal, the current output terminal of the fourth controlled element is grounded, and when the fourth driving element is turned on, the fourth controlled element is driven to turn on.

5. The AC signal control circuit according to claim 4, characterized in that: The third isolating switch includes a third optical coupler, the third driving element includes a third light emitting diode, and the third controlled element includes a third phototransistor; The current input end of the third light-emitting diode is connected to the AC signal input end through the third unidirectional conductive element, the current output end of the third light-emitting diode is connected to the neutral line, the current input end of the third phototransistor is connected to the voltage input end and the first signal output end, the current output end of the third phototransistor is grounded, and when the third light-emitting diode is turned on, the third phototransistor is driven to be turned on; The fourth isolation switch includes a fourth optical coupler, the fourth driving element includes a fourth light emitting diode, and the fourth controlled element includes a fourth phototransistor; The current input end of the fourth light-emitting diode is connected to the neutral line through the fourth unidirectional conductive element, the current output end of the fourth light-emitting diode is connected to the AC signal input end, the current input end of the fourth phototransistor is connected to the voltage input end and the second signal output end, the current output end of the fourth phototransistor is grounded, and when the fourth light-emitting diode is turned on, the fourth phototransistor is driven to be turned on.

6. The AC signal control circuit according to claim 5, characterized in that: The third unidirectional conductive element comprises a third diode, one end of the third diode is connected to the AC signal input end, and the other end of the third diode is connected to the current input end of the third light emitting diode; The fourth unidirectional conducting element comprises a fourth diode, one end of the fourth diode is connected to the neutral line, and the other end of the fourth diode is connected to the current input end of the fourth light emitting diode.

7. The AC signal control circuit according to claim 6, characterized in that: The control output circuit also includes a first current limiting resistor, a second current limiting resistor and an overcurrent protection device; One end of the first current limiting resistor is connected to the first control end, and the other end of the first current limiting resistor is connected to the current input end of the first light-emitting diode; one end of the second current limiting resistor is connected to the second control end, and the other end of the second current limiting resistor is connected to the current input end of the second light-emitting diode; one end of the overcurrent protection device is connected to the first diode and the second diode, and the other end is connected to the AC signal output end; The control input circuit also includes a third current limiting resistor, a fourth current limiting resistor, a first AC current limiting resistor and a second AC current limiting resistor; One end of the third current limiting resistor is connected to the current input end of the third phototransistor, and the other end of the third current limiting resistor is connected to the first signal output end; one end of the first AC current limiting resistor is connected to the AC signal input end, and the other end is connected to the third diode; one end of the fourth current limiting resistor is connected to the current input end of the fourth phototransistor, and the other end of the fourth current limiting resistor is connected to the second signal output end; one end of the second AC current limiting resistor is connected to the neutral line, and the other end is connected to the fourth diode.

8. The AC signal control circuit according to claim 7, characterized in that: Also including a first pull-up resistor and a second pull-up resistor; One end of the first pull-up resistor is connected to the voltage input end, and the other end of the first pull-up resistor is connected to the current input end of the third phototransistor; One end of the second pull-up resistor is connected to the voltage input end, and the other end of the second pull-up resistor is connected to the current input end of the fourth phototransistor.

9. An alternating current signal control device, characterized in that: It comprises an AC signal control circuit as described in claims 1-8.

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