CN220544994U

CN220544994U - Transmitting circuit, receiving circuit, communication device, working device, and signal system

Info

Publication number: CN220544994U
Application number: CN202322290990.4U
Authority: CN
Inventors: 阳帅; 陈明; 王金鹏; 杨辅; 吴益
Original assignee: Hunan Zoomlion Intelligent Technology Co ltd
Current assignee: Hunan Zoomlion Intelligent Technology Co ltd
Priority date: 2023-08-24
Filing date: 2023-08-24
Publication date: 2024-02-27
Anticipated expiration: 2033-08-24

Abstract

The utility model relates to the field of signal transmission and discloses a transmitting circuit, a receiving circuit, communication equipment, operation equipment and a signal system. The transmitting circuit comprises a first power end, a second power end, a first switching tube, a second switching tube, a first diode, a signal end and a power output end; the anode of the first diode is connected with the first power supply end, the cathode of the first diode is connected with the power supply output end, the second power supply end is connected with the power supply output end through the first switching tube, the signal end is connected with the control end of the second switching tube, the first end of the second switching tube is connected with the control end of the first switching tube, and the second end of the second switching tube is grounded; the signal end is used for connecting the master control equipment, and the power output end is used for connecting the control equipment. The main control equipment is connected with the control equipment through the power output end of the sending circuit, the control equipment does not need to additionally set a communication interface, foreign matters are prevented from entering the control equipment through the communication interface, and the entrance protection level of the control equipment is improved.

Description

Transmitting circuit, receiving circuit, communication device, working device, and signal system

Technical Field

The present utility model relates to the field of signal transmission, and in particular, to a transmitting circuit, a receiving circuit, a communication device, an operation device, and a signal system.

Background

With the rapid development of the manufacturing technology of the working equipment, the working equipment is widely applied to various working scenes such as earth and stone excavation, road construction, lifting operation and the like. Typically, an operator controls the work equipment by outputting an analog signal using a joystick, a handle, or the like. In order to ensure the control accuracy of the control device, the control device needs to be calibrated before the operation device is put into use. Taking a joystick as an example, the master control device typically writes the relationship of the joystick offset angle to the output signal to the joystick via a communication interface provided by the joystick.

In an actual working scene of the working equipment, a situation that foreign matters enter the working equipment exists, and then the working equipment is caused to run out. To reduce the probability of foreign objects entering the interior of the work equipment, the work equipment is often required to have a high ingress protection (Ingress Protection, IP) rating. However, the control device needs to provide a communication interface, and after the calibration of the control device is completed, the control device is not connected with the main control device through the communication interface, and foreign matters easily enter the control device through the communication interface, so that the entrance protection of the operation device is affected.

Disclosure of Invention

An object of an embodiment of the present utility model is to provide an apparatus for solving the problem that foreign matter easily enters a manipulation apparatus.

In order to achieve the above object, in a first aspect, the present application provides a transmitting circuit, where the transmitting circuit includes a first power supply terminal, a second power supply terminal, a first switching tube, a second switching tube, a first diode, a signal terminal, and a power output terminal;

the anode of the first diode is connected with the first power supply end, the cathode of the first diode is connected with the power supply output end, the second power supply end is connected with the power supply output end through the first switching tube, the signal end is connected with the control end of the second switching tube, the first end of the second switching tube is connected with the control end of the first switching tube, and the second end of the second switching tube is grounded, wherein the voltage of the first power supply end is smaller than that of the second power supply end;

the signal end is used for connecting with the main control equipment, and the power output end is used for connecting with the control equipment;

the signal end is used for controlling the on-off of the first switching tube and the on-off of the second switching tube based on the communication signal output by the main control equipment so as to control the voltage of the power supply output end.

With reference to the first aspect, in a first possible implementation manner, the sending circuit further includes a first protection subcircuit, a second protection subcircuit, a first pull-down resistor, and a second pull-down resistor;

the first end of the second switching tube is connected with the control end of the first switching tube through the first protection subcircuit, and the signal end is connected with the control end of the second switching tube through the second protection subcircuit;

the second power end is connected with the control end of the first switching tube through the first pull-down resistor, and the second end of the second switching tube is connected with the control end of the second switching tube through the second pull-down resistor.

With reference to the first aspect, in a second possible implementation manner, the transmitting circuit further includes an insurance sub-circuit;

the safety sub-circuit is connected with the power supply output end.

In a second aspect, the present application provides a receiving circuit, the receiving circuit including a power input terminal, a reference voltage source terminal, and a comparator;

the power input end is connected with the first input end of the comparator, and the reference voltage source end is connected with the second input end of the comparator;

the output end of the comparator is used for connecting with the control equipment, and the power supply input end is used for connecting with the power supply output end of the transmitting circuit as the first aspect;

the comparator is used for outputting a level signal based on the voltage of the first input end and the voltage of the second input end.

With reference to the second aspect, in a first possible implementation manner, the receiving circuit further includes a first voltage divider sub-circuit and a second voltage divider sub-circuit;

the power input end is connected with the first input end of the comparator through the first voltage dividing sub-circuit, and the reference voltage source end is connected with the second input end of the comparator through the second voltage dividing sub-circuit.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner, the receiving circuit further includes a third protection sub-circuit;

the first voltage dividing sub-circuit is connected with the first input end of the comparator through the third protection sub-circuit.

With reference to the second aspect, in a third possible implementation manner, the receiving circuit further includes a second diode, a third diode, and a filter capacitor;

the cathode of the second diode is connected with the reference voltage source end, the anode of the second diode is connected with the cathode of the third diode, and the anode of the third diode is grounded;

the first input end of the comparator is connected with a node between the cathode of the second diode and the cathode of the third diode, and the power end of the comparator is grounded through the filter capacitor.

In a third aspect, the present application provides a communication device comprising a transmitting circuit as in the first aspect, the transmitting circuit being for connecting to a master device.

In a fourth aspect, the present application provides a work apparatus comprising a manipulation apparatus and a receiving circuit as in the second aspect, the receiving circuit being connected to the manipulation apparatus.

In a fifth aspect, the present application provides a signaling system comprising a master device, a communication device as in the third aspect, and a working device as in the fourth aspect, the master device being connected to the working device by the communication device.

The application provides a transmitting circuit, which comprises a first power end, a second power end, a first switching tube, a second switching tube, a first diode, a signal end and a power output end; the anode of the first diode is connected with the first power supply end, the cathode of the first diode is connected with the power supply output end, the second power supply end is connected with the power supply output end through the first switching tube, the signal end is connected with the control end of the second switching tube, the first end of the second switching tube is connected with the control end of the first switching tube, and the second end of the second switching tube is grounded; the signal end is used for connecting the master control equipment, and the power output end is used for connecting the control equipment. When the control equipment is required to be calibrated through the main control equipment, the main control equipment is connected with the control equipment through the power output end of the sending circuit. The control equipment does not need to be additionally provided with a communication interface, so that foreign matters are prevented from entering the control equipment through the communication interface, and the entrance protection level of the control equipment is improved. Meanwhile, the control equipment and the main control equipment are only connected through the transmitting circuit, no additional connecting wires are required, and the efficiency of calibrating the control equipment is improved.

Drawings

The accompanying drawings are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain, without limitation, the embodiments of the utility model. In the drawings:

fig. 1 shows a first schematic configuration of a transmitting circuit provided in an embodiment of the present application;

fig. 2 shows a second structural schematic diagram of a transmitting circuit provided in an embodiment of the present application;

fig. 3 shows a first schematic configuration of a receiving circuit according to an embodiment of the present application;

fig. 4 shows a second schematic configuration of a receiving circuit according to an embodiment of the present application;

fig. 5 shows a first structural schematic diagram of a signal system provided in an embodiment of the present application;

fig. 6 shows a second structural schematic diagram of the signal system provided in the embodiment of the present application.

Description of the reference numerals

100-transmitting circuit, 200-receiving circuit, 300-main control equipment and 400-control equipment; 110-a first protection sub-circuit, 120-a second protection sub-circuit, 130-a protection sub-circuit; 210-a first voltage divider sub-circuit, 220-a second voltage divider sub-circuit, 230-a third protection sub-circuit; VDD 1-a first power supply end, VDD 2-a second power supply end, VOUT-power supply output end, VIN-power supply input end, VDD 3-reference voltage source end, VDD 4-power supply and TXD-signal end; q1-first switching tube, Q2-second switching tube, D1-first diode, D2-second diode, D3-third diode, C1-filter capacitor, U1-comparator, R1-first pull-down resistor, R2-second pull-down resistor; r3-first protection resistor, R4-second protection resistor, R5-third protection resistor, R6-first voltage dividing resistor, R7-second voltage dividing resistor, R8-third voltage dividing resistor, R9-fourth voltage dividing resistor.

Detailed Description

The following describes the detailed implementation of the embodiments of the present utility model with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

The terms "comprises," "comprising," "including," or any other variation thereof, are intended to cover a specific feature, number, step, operation, element, component, or combination of the foregoing, which may be used in various embodiments of the present utility model, and are not intended to first exclude the presence of or increase the likelihood of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.

Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the utility model belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having a meaning that is the same as the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in connection with the various embodiments of the utility model.

Example 1

Referring to fig. 1, fig. 1 is a schematic diagram illustrating a first configuration of a transmitting circuit 100 according to an embodiment of the present application.

In the embodiment of the present application, the transmitting circuit 100 includes a first power supply terminal VDD1, a second power supply terminal VDD2, a first switching tube Q1, a second switching tube Q2, a first diode D1, a signal terminal TXD, and a power supply output terminal VOUT;

the anode of the first diode D1 is connected with a first power supply end VDD1, the cathode of the first diode D1 is connected with a power supply output end VOUT, the second power supply end VDD2 is connected with the power supply output end VOUT through a first switching tube Q1, the signal end TXD is connected with the control end of a second switching tube Q2, the first end of the second switching tube Q2 is connected with the control end of the first switching tube Q1, and the second end of the second switching tube Q2 is grounded, wherein the voltage of the first power supply end VDD1 is smaller than that of the second power supply end VDD 2;

the signal terminal TXD is used for connecting with the main control equipment 300, and the power output terminal VOUT is used for connecting with the control equipment 400;

the signal terminal TXD is configured to control on-off of the first switching tube Q1 and on-off of the second switching tube Q2 based on a communication signal output by the master control device 300, so as to control a voltage of the power output terminal VOUT.

The type of the operation device 400 is set according to practical requirements, and may be an operation lever, an operation handle, or the like, which is not limited herein. When the operation device 400 needs to be calibrated, the power output terminal VOUT is connected to the operation device 400 through a power line. The signal terminal TXD is configured to control on-off of the first switching tube Q1 and on-off of the second switching tube Q2 based on a communication signal output by the master control device 300, so as to control a voltage of the power output terminal VOUT.

Specifically, when the communication signal output by the master control device 300 is at a low level, the first switching tube Q1 and the second switching tube Q2 are both turned off, and the power output terminal VOUT is turned off from the second power terminal VDD2, and the voltage of the power output terminal VOUT is equal to the voltage of the first power terminal VDD 1. When the communication signal output by the master control device 300 is at a high level, the first switching tube Q1 and the second switching tube Q2 are both turned on, and the power output terminal VOUT is turned on with the second power terminal VDD 2. Because the first diode D1 is present between the power output terminal VOUT and the first power terminal VDD1, the voltage of the power output terminal VOUT is equal to the voltage of the second power terminal VDD2, and a short circuit between the first power terminal VDD1 and the second power terminal VDD2 is avoided. When the communication signal of the master control device 300 changes, the voltage of the first power supply terminal VDD1 is smaller than the voltage of the second power supply terminal VDD2, so that the corresponding communication signal of the power supply output terminal VOUT changes. The control device 400 restores the communication signal through the voltage change of the power output terminal VOUT.

When the manipulation device 400 needs to be calibrated by the master device 300, the master device 300 is connected to the manipulation device 400 through the power output VOUT of the transmitting circuit 100. The operation device 400 does not need to additionally provide a communication interface, so that foreign matters are prevented from entering the operation device 400 through the communication interface, and the entrance protection level of the operation device 400 is improved. Meanwhile, the control device 400 and the main control device 300 only need to be connected with power through the transmitting circuit 100, no additional connecting wires are needed, and the efficiency of calibrating the control device 400 is improved.

It should be understood that the types of the first switching tube Q1 and the second switching tube Q2 are set according to practical requirements, and may be a triode, a MOS (Metal-Oxide-Semiconductor Field-Effect Transistor), a relay, etc., which are not limited herein. The voltage value of the first power supply terminal VDD1 and the voltage value of the second power supply terminal VDD2 are also set according to actual requirements, which is not limited herein. For ease of understanding, in the embodiment of the present application, the first switching tube Q1 is a MOS tube, and the second switching tube Q2 is a triode. The type of the main control device 300 is set according to actual requirements, and may be a personal computer, a mobile terminal, etc., which is not limited herein. The type of the manipulation apparatus 400 is also set according to practical requirements, and may be a joystick, a handle, etc., which are not limited herein.

In the embodiment of the present application, the transmitting circuit 100 further includes a first protection sub-circuit 110, a second protection sub-circuit 120, a first pull-down resistor R1 and a second pull-down resistor R2;

the first end of the second switching tube Q2 is connected with the control end of the first switching tube Q1 through the first protection subcircuit 110, and the signal end TXD is connected with the control end of the second switching tube Q2 through the second protection subcircuit 120;

the second power supply end VDD2 is connected with the control end of the first switching tube Q1 through a first pull-down resistor R1, and the second end of the second switching tube Q2 is connected with the control end of the second switching tube Q2 through a second pull-down resistor R2.

Referring to fig. 2, fig. 2 is a schematic diagram illustrating a second configuration of a transmitting circuit 100 according to an embodiment of the present application.

The first protection sub-circuit 110 is used for protecting the first switching tube Q1, and the second protection sub-circuit 120 is used for protecting the second switching tube Q2, so as to avoid the damage of the first switching tube Q1 and the second switching tube Q2 caused by the overlarge voltage of the transmitting circuit 100. The first pull-down resistor R1 is used for clamping the level of the first switching tube Q1 and limiting current. The second pull-down resistor R2 is used for clamping the level of the second switching tube Q2 and limiting current.

It should be understood that the protection devices included in the first protection sub-circuit 110 and the second protection sub-circuit 120 are set according to actual requirements, and the protection devices may be resistors, etc., which are not limited herein. The resistance values of the first pull-down resistor R1 and the second pull-down resistor R2 are set according to actual requirements, and are not limited herein.

In an embodiment of the present application, the transmitting circuit 100 further includes a safety sub-circuit 130;

the safety sub-circuit 130 is connected to the power output VOUT.

The safety devices included in the safety sub-circuit 130 are set according to actual requirements, and are not limited herein. For ease of understanding, the protection subcircuit 130 in embodiments of the present application is comprised of a fuse device such as a self-healing fuse. When the transmission circuit 100 has a fault such as a short circuit or overload, the safety sub-circuit 130 is in a high-resistance state, and protects the transmission circuit 100. When the transmitting circuit 100 has no faults such as short circuit and overload, the safety sub-circuit 130 is in a low-resistance state, so that the transmitting circuit 100 is turned on. It should be understood that the transmitting circuit 100 further includes other devices and circuits, which are configured according to actual requirements, and are not limited herein.

The application provides a transmitting circuit 100, wherein the transmitting circuit 100 comprises a first power supply end VDD1, a second power supply end VDD2, a first switching tube Q1, a second switching tube Q2, a first diode D1, a signal end TXD and a power supply output end VOUT; the anode of the first diode D1 is connected with the first power supply end VDD1, the cathode of the first diode D1 is connected with the power supply output end VOUT, the second power supply end VDD2 is connected with the power supply output end VOUT through the first switching tube Q1, the signal end TXD is connected with the control end of the second switching tube Q2, the first end of the second switching tube Q2 is connected with the control end of the first switching tube Q1, and the second end of the second switching tube Q2 is grounded; the signal terminal TXD is used for connecting to the master control device 300, and the power output terminal VOUT is used for connecting to the control device 400. When the manipulation device 400 needs to be calibrated by the master device 300, the master device 300 is connected to the manipulation device 400 through the power output VOUT of the transmitting circuit 100. The operation device 400 does not need to additionally provide a communication interface, so that foreign matters are prevented from entering the operation device 400 through the communication interface, and the entrance protection level of the operation device 400 is improved. Meanwhile, the control device 400 and the main control device 300 only need to be connected with power through the transmitting circuit 100, no additional connecting wires are needed, and the efficiency of calibrating the control device 400 is improved.

Example 2

Referring to fig. 3, fig. 3 is a schematic diagram illustrating a first configuration of a receiving circuit 200 according to an embodiment of the present application.

The receiving circuit 200 in the embodiment of the present application includes a power input terminal VIN, a reference voltage source terminal VDD3 and a comparator U1;

the power input end VIN is connected with the first input end of the comparator U1, and the reference voltage source end VDD3 is connected with the second input end of the comparator U1;

the output terminal of the comparator U1 is used to connect to the control device 400, and the power input terminal VIN is used to connect to the power output terminal VOUT of the transmitting circuit 100 as in embodiment 1;

the comparator U1 is configured to output a level signal based on the voltage of the first input terminal and the voltage of the second input terminal.

The transmitting circuit 100 is configured to be connected to the master control device 300, and a voltage of a power output VOUT of the transmitting circuit 100 changes according to a communication signal of the master control device 300, so that a voltage of a first input of the comparator U1 changes according to the communication signal. The comparator U1 is configured to output a level signal based on the voltage of the first input terminal and the voltage of the second input terminal. Specifically, when the voltage of the first input terminal of the comparator U1 is greater than the voltage of the second input terminal, the level signal output by the comparator U1 is at a high level. When the voltage of the first input terminal of the comparator U1 is less than or equal to the voltage of the second input terminal, the level signal output by the comparator U1 is at a low level.

For ease of understanding, in the embodiment of the present application, the first input terminal of the comparator U1 is a non-inverting input terminal, and the second input terminal of the comparator U1 is an inverting input terminal. When the master control apparatus 300 is used to calibrate the control apparatus 400, if the communication signal of the master control apparatus 300 is at a high level, the level signal outputted by the comparator U1 corresponds to the communication signal being at a high level. In the case where the communication signal of the master device 300 is low level, the level signal corresponding to the communication signal output from the comparator U1 is low level.

Since the level signal output by the comparator U1 corresponds to the communication signal output by the master control device 300, the control device 400 can perform calibration according to the level signal output by the comparator U1. The control device 400 is connected to the master device 300 through the power input VIN of the receiving circuit 200 and the transmitting circuit 100 in sequence. The operation device 400 does not need to additionally provide a communication interface, so that foreign matters are prevented from entering the operation device 400 through the communication interface, and the entrance protection level of the operation device 400 is improved.

In the embodiment of the present application, the receiving circuit 200 further includes a first voltage divider sub-circuit 210 and a second voltage divider sub-circuit 220;

the power input terminal VIN is connected to the first input terminal of the comparator U1 through the first voltage divider sub-circuit 210, and the reference voltage source terminal VDD3 is connected to the second input terminal of the comparator U1 through the second voltage divider sub-circuit 220.

Referring to fig. 4, fig. 4 is a schematic diagram illustrating a second configuration of a receiving circuit 200 according to an embodiment of the present application.

When the voltage at the first input terminal and/or the second input terminal of the comparator U1 is too high, the comparator U1 is easily damaged. The voltage of the power input terminal VIN is divided by the first voltage dividing sub-circuit 210, and the voltage of the reference voltage source terminal VDD3 is divided by the second voltage dividing sub-circuit 220, so as to avoid the damage of the comparator U1 caused by the too high voltage. It should be understood that the voltage dividing devices included in the first voltage dividing sub-circuit 210 and the second voltage dividing sub-circuit 220 are set according to actual requirements, and the voltage dividing devices may be resistors, etc., which are not limited herein.

In the case where the receiving circuit 200 does not include the first voltage divider sub-circuit 210 and the second voltage divider sub-circuit 220, the voltage of the reference voltage source terminal VDD3 is greater than or equal to the voltage of the first power source terminal VDD1, and the voltage of the reference voltage source terminal VDD3 is less than the voltage of the second power source terminal VDD 2. In the case where the receiving circuit 200 includes the first voltage divider sub-circuit 210 and the second voltage divider sub-circuit 220, the voltage divided by the reference voltage source terminal VDD3 is greater than or equal to the voltage divided by the first power source terminal VDD1, and the voltage divided by the reference voltage source terminal VDD3 is less than the voltage divided by the second power source terminal VDD 2.

In the embodiment of the present application, the receiving circuit 200 further includes a third protection sub-circuit 230;

the first voltage dividing sub-circuit 210 is connected to the first input terminal of the comparator U1 through the third protection sub-circuit 230.

The third protection sub-circuit 230 is configured to include the first input terminal of the comparator U1, so as to avoid the comparator U1 from being damaged due to the excessive voltage of the transmitting circuit 100. It should be understood that the protection devices included in the third protection sub-circuit 230 are all set according to actual requirements, and the protection devices may be resistors or the like.

In the embodiment of the present application, the receiving circuit 200 further includes a second diode D2, a third diode D3, and a filter capacitor C1;

the cathode of the second diode D2 is connected with the reference voltage source end VDD3, the anode of the second diode D2 is connected with the cathode of the third diode D3, and the anode of the third diode D3 is grounded;

the first input end of the comparator U1 is connected with a node between the cathode of the second diode D2 and the cathode of the third diode D3, and the power end of the comparator U1 is grounded through the filter capacitor C1.

When the power input terminal VIN of the receiving circuit 200 misunderstands the high voltage power, the second diode D2 and the third diode D3 together form a protection circuit for protecting the comparator U1 from being damaged due to the high voltage. The comparator U1 further includes a ground terminal and a power terminal, where the power terminal of the comparator U1 in the embodiment of the present application is used to connect to the control device 400, and the power supply VDD4 of the control device 400 supplies power to the comparator U1.

The power supply end of the comparator U1 is grounded through the filter capacitor C1, so that the control device 400 can provide high-efficiency smooth current for the comparator U1, and further the influence of the ripple coefficient of the current pulsation of the control device 400 on the comparator U1 is reduced. It should be understood that the receiving circuit 200 further includes other devices and circuits, which are disposed according to actual requirements, and are not limited herein.

The embodiment of the application also provides a communication device, which includes a transmitting circuit 100 as in embodiment 1, where the transmitting circuit 100 is used to connect to a master device 300.

The master control device 300 is configured to output a communication signal to calibrate the manipulation device 400. The type of the master control apparatus 300 is set according to actual requirements, and may be a mobile computer or the like, which is not limited herein. Typically, the communication signal is in the form of an analog signal or a digital signal, and the master control device 300 needs to be connected to the manipulation device 400 through a communication interface. The communication device is utilized to convert the communication signal output by the master control device 300, so that the master control device 300 can be connected with the control device 400 through the power output terminal VOUT of the transmitting circuit 100, and the control device 400 does not need to additionally set a communication interface. It should be understood that the communication device further includes other devices and circuits, which are set according to actual requirements, and are not limited herein.

The embodiment of the application also provides a working device, which comprises a control device 400 and the receiving circuit 200 of the embodiment 2, wherein the receiving circuit 200 is connected with the control device 400.

The receiving circuit 200 is connected to the manipulation device 400, so that the manipulation device 400 can be connected to the master device 300 through the power input VIN of the receiving circuit 200. It should be understood that when the manipulation apparatus 400 needs to be calibrated, the receiving circuit 200 is connected to the transmitting circuit 100, so that the master apparatus 300 is connected to the manipulation apparatus 400 sequentially through the power output terminal VOUT of the transmitting circuit 100 and the power output terminal VOUT of the receiving circuit 200. On the basis that the control device 400 does not need to additionally provide a communication interface, communication between the master control device 300 and the control device 400 is realized. After the calibration of the manipulation device 400 is completed, the receiving circuit 200 is disconnected from the transmitting circuit 100, and the master device 300 is disconnected from the manipulation device 400. The operation device 400 is connected to the power supply of the operation device through the power input terminal VIN of the receiving circuit 200, and further controls the operation device to perform the operation through the operation device 400. The working equipment also comprises other devices and circuits, which are arranged according to actual requirements and are not limited in this regard.

The embodiment of the application also provides a signal system, which comprises a main control device 300, a communication device in the embodiment and a working device in the embodiment, wherein the main control device 300 is connected with the working device through the communication device.

Referring to fig. 5, fig. 5 shows a first structural schematic diagram of a signal system according to an embodiment of the present application.

When the operation device 400 needs to be calibrated, the main control device 300, the communication device and the operation device form a signal system, so that the main control device 300 is utilized to calibrate the operation device 400 of the operation device. For ease of understanding, the communication device in the figure shows only the transmitting circuit 100, and the working device shows only the receiving circuit 200 and the manipulation device 400.

Referring to fig. 6, fig. 6 is a schematic diagram illustrating a second structure of a signal system according to an embodiment of the disclosure.

For ease of understanding, in the embodiment of the present application, the first protection sub-circuit 110 is implemented by the first protection resistor R3, the second protection sub-circuit 120 is implemented by the second protection resistor R4, and the third protection sub-circuit 230 is implemented by the third protection resistor R5. The first voltage dividing circuit is realized by a first voltage dividing resistor R6 and a second voltage dividing resistor R7, and the second voltage dividing circuit is realized by a third voltage dividing resistor R8 and a fourth voltage dividing resistor R9.

Further, in the embodiment of the present application, the voltage of the first power supply terminal VDD1 is 7V, the voltage of the second power supply terminal VDD2 is 12V, the resistance of the first voltage dividing resistor R6 is 300kΩ, and the resistance of the second voltage dividing resistor R7 is 100kΩ. When the communication signal is at a high level, the voltage of the power output terminal VOUT is 12V, and the first voltage dividing circuit is configured to divide the voltage of the power output terminal VOUT to 3V. When the communication signal is at a low level, the voltage of the power output terminal VOUT is 7V, and the first voltage dividing circuit is configured to divide the voltage of the power output terminal VOUT to 1.75V. Meanwhile, the voltage of the reference voltage source terminal VDD3 is 3.3V, the resistance of the third voltage dividing resistor R8 is 10kΩ, the resistance of the fourth voltage dividing resistor R9 is 20kΩ, and the second voltage dividing sub-circuit 220 is configured to divide the voltage of the reference voltage source terminal VDD3 into 2.2V.

When the communication signal output by the master device 300 is at a low level, the first power terminal VDD1 supplies power to the receiving circuit 200, and the voltage of the first input terminal of the comparator U1 is 1.75V less than 2.2V, so that the comparator U1 outputs a level signal at a low level. When the communication signal output by the main control device 300 is at a high level, the second power supply terminal VDD2 supplies power to the receiving circuit 200, and the voltage of the first input terminal of the comparator U1 is 3V or more and 2.2V, so that the level signal output by the comparator U1 is at a high level.

The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present utility model within the scope of the technical concept of the present utility model, and all the simple modifications belong to the protection scope of the present utility model. In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the utility model are not described in detail in order to avoid unnecessary repetition.

Moreover, any combination of the various embodiments of the utility model can be made without departing from the spirit of the utility model, which should also be considered as disclosed herein.

Claims

1. The transmitting circuit is characterized by comprising a first power end, a second power end, a first switching tube, a second switching tube, a first diode, a signal end and a power output end;

the anode of the first diode is connected with the first power supply end, the cathode of the first diode is connected with the power supply output end, the second power supply end is connected with the power supply output end through the first switch tube, the signal end is connected with the control end of the second switch tube, the first end of the second switch tube is connected with the control end of the first switch tube, and the second end of the second switch tube is grounded, wherein the voltage of the first power supply end is smaller than that of the second power supply end;

2. The transmit circuit of claim 1, further comprising a first protection subcircuit, a second protection subcircuit, a first pull-down resistor, and a second pull-down resistor;

3. The transmit circuit of claim 1, wherein the transmit circuit further comprises a safety sub-circuit;

the safety sub-circuit is connected with the power supply output end.

4. The receiving circuit is characterized by comprising a power input end, a reference voltage source end and a comparator;

an output terminal of the comparator is used for being connected with a control device, and the power input terminal is used for being connected with a power output terminal of the transmitting circuit as claimed in any one of claims 1 to 3;

5. The receive circuit of claim 4, wherein the receive circuit further comprises a first voltage divider sub-circuit and a second voltage divider sub-circuit;

6. The receive circuit of claim 5, wherein the receive circuit further comprises a third protection subcircuit;

7. The receiving circuit of claim 6, further comprising a second diode, a third diode, and a filter capacitor;

8. A communication device comprising a transmitting circuit according to any one of claims 1 to 3 for connecting to a master device.

9. A working device comprising a handling device and a receiving circuit according to any one of claims 4 to 7, said receiving circuit being connected to said handling device.

10. A signalling system comprising a master device, a communication device according to claim 8 and a working device according to claim 9, the master device being connected to the working device by the communication device.