CN213342220U

CN213342220U - Signal transmitting device, signal receiving device, communication equipment and air conditioning unit

Info

Publication number: CN213342220U
Application number: CN202022286298.0U
Authority: CN
Inventors: 勾良才; 陈万兴; 钱沛
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2021-06-01
Anticipated expiration: 2030-10-14

Abstract

The utility model discloses a signal transmission device, signal receiving arrangement, communication equipment and air conditioning unit. Wherein, this signal transmission device includes: the conversion module is used for converting the digital signal into an analog control signal; the input end of the driving module is connected with the conversion module, the output end of the driving module is connected with the light emitting module, and the driving module is used for controlling the light emitting module according to the analog control signal; and the light emitting module is used for emitting light signals or interrupting the light signals under the control of the driving module. Through the utility model discloses, can realize radio communication, avoid wired communication mode's the complicated and signal interference's of wiring problem.

Description

Signal transmitting device, signal receiving device, communication equipment and air conditioning unit

Technical Field

The utility model relates to the field of communication technology, particularly, relate to a signal transmission device, signal reception device, communication equipment and air conditioning unit.

Background

At present, communication modes among electrical equipment (such as controllers of commercial air conditioners) are mainly wired communication modes such as 485 communication and CAN communication, application scenes of the electrical equipment are gradually diversified, electromagnetic environments are more complicated, for example, electromagnetic interference environments (such as communication environments under the condition of power grid inspection), electromagnetic sensitive environments (such as communication environments on airplanes and ships), electronic shielding environments (such as communication environments under underground parking lots, coal mines and intermediate ground sources), influence on the communication equipment is easy to cause, communication faults or communication stability is reduced, and the assembly of communication lines increases the difficulty of electric wiring of an electric cabinet.

The problem that in the prior art, communication is conducted in a wired mode, the communication stability is reduced due to the fact that the communication is easily affected by the external environment, and wiring is complex is solved.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an in provide a signal transmission device, signal receiving device, communication equipment and air conditioning unit to solve among the prior art through wired mode communication, easily receive external environment influence, cause communication stability to reduce, and walk the complicated problem of line.

In order to solve the above technical problem, the utility model provides a signal transmission device, this signal transmission device includes:

the conversion module is used for converting the digital signal into an analog control signal;

the input end of the driving module is connected with the conversion module, the output end of the driving module is connected with the light emitting module, and the driving module is used for controlling the light emitting module according to the analog control signal;

the light emitting module is used for emitting light signals or interrupting the light signals under the control of the driving module.

Further, the driving module includes:

the power supply is used for supplying power to the light emitting module;

and the controllable switch is arranged between the power supply and the light emitting module and is used for controlling the self to be switched on or switched off according to the analog control signal.

Further, the light emitting module is a light emitting diode.

Further, the signal transmission device further includes:

the pulse width modulation module comprises at least two modulation units and at least one output terminal, wherein each modulation unit is connected with each output terminal respectively;

each output terminal is connected with the conversion module; the conversion module is used for converting the initial input signal into a digital signal and then transmitting the digital signal to the conversion module.

Further, the pulse width modulation module further comprises:

and the key switches are arranged between each modulation unit and different output terminals and are used for respectively controlling the on-off between each modulation unit and different output terminals.

The utility model also provides a signal receiving device, this signal receiving device includes:

the optical receiving module and the optical transmitting module are arranged in the same propagation space and are used for receiving optical signals sent by the optical transmitting module and generating analog electric signals according to the optical signals;

and the inverse conversion module is used for reducing the analog electric signal into a digital signal and then outputting the digital signal.

Further, the light receiving module includes:

and the first end of the photosensitive element is grounded, the second end of the photosensitive element is connected with the reverse conversion module, and the photosensitive element is used for being switched on when receiving an optical signal and being switched off when not receiving the optical signal.

Further, the inverse transform module is specifically configured to:

when the photosensitive element is conducted, outputting a high level signal;

and when the photosensitive element is cut off, outputting a low level signal.

Further, the inverse transform module comprises:

and a first input end of the comparator is connected with a voltage source through a first resistor, a second input end of the comparator is connected with the voltage source through a second resistor, and the second input end of the comparator is also connected with the photosensitive element.

Further, the first resistor is a variable resistor.

Further, the inverse transform module further comprises:

and the anode of the indicating element is connected with the voltage source through a third resistor, and the cathode of the indicating element is connected with the output end of the comparator and is used for indicating the conduction state of the reverse conversion module.

The utility model also provides a communication equipment, communication equipment includes above-mentioned signal transmission device to and above-mentioned signal receiving arrangement.

The utility model also provides an air conditioning unit, including above-mentioned communication equipment among the air conditioning unit.

Use the technical scheme of the utility model, digital signal conversion that will need the transmission through conversion module is analog control signal, through drive module according to this analog control signal control optical transmission module, optical transmission module sends optical signal or interrupt light signal under drive module's control to this realization turns into optical signal with the digital signal that needs the transmission and transmits, can realize wireless communication, has avoided the problem that the easy external environment that receives of wire communication mode disturbs and the wiring is complicated.

Drawings

Fig. 1 is a structural view of a signal transmission device according to an embodiment of the present invention;

fig. 2 is a circuit configuration diagram of a driving module according to an embodiment of the present invention;

fig. 3 is a structural view of a signal transmission device according to another embodiment of the present invention;

fig. 4 is a block diagram of a pulse width modulation module according to an embodiment of the present invention;

fig. 5 is a structural diagram of a signal receiving apparatus according to an embodiment of the present invention;

fig. 6 is a schematic diagram of an optical signal transmission path of an optical receiving module and an optical transmitting module according to an embodiment of the present invention;

fig. 7 is a schematic diagram of an optical signal transmission path of an optical receiving module and an optical transmitting module according to another embodiment of the present invention;

fig. 8 is a block diagram of an inverse transform module according to an embodiment of the present invention;

fig. 9 is a block diagram of a communication device according to an embodiment of the present invention;

fig. 10 is a schematic diagram of an operation of a communication device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that although the terms first, second, third, etc. may be used to describe resistors in embodiments of the present invention, these resistors should not be limited to these terms. These terms are only used to distinguish between resistors disposed at different locations. For example, a first resistor may also be referred to as a second resistor, and similarly, a second resistor may also be referred to as a first resistor without departing from the scope of embodiments of the present invention.

The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.

It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.

The following describes in detail alternative embodiments of the present invention with reference to the accompanying drawings.

Example 1

This embodiment provides a signal transmission device, and fig. 1 is a structural diagram of a signal transmission device according to an embodiment of the present invention, as shown in fig. 1, the signal transmission device includes:

the conversion module 10 is used for converting the digital signal into an analog control signal; in this embodiment, the conversion module 10 may be implemented by an analog-to-digital conversion chip, such as DAC5573IPW, DAC8571IDGK, PCF8591, and the like.

The signal transmitting apparatus further includes a driving module 20, an input end of the driving module is connected to the converting module 10, an output end of the driving module is connected to the light emitting module 30, and the driving module 20 is configured to control the light emitting module according to the analog control signal output by the converting module 10.

The light emitting module 30 is configured to emit a light signal or interrupt the light signal under the control of the driving module 20, that is, the light emitting module 30 is switched between a light emitting state and a non-light emitting state under the driving of the driving module.

The signal sending device of this embodiment converts the digital signal that needs to be transmitted into analog control signal through the conversion module, through drive module according to this analog control signal control optical transmission module, optical transmission module sends optical signal or breaks optical signal under drive module's control to this realization turns into optical signal with the digital signal that needs the transmission and transmits, can realize wireless communication, has avoided the problem that the easy external environment that receives of wired communication mode disturbs and the wiring is complicated.

Example 2

This embodiment provides another kind of signal transmission device, fig. 2 is a circuit structure diagram of a driving module according to the embodiment of the present invention, as shown in fig. 2, this driving module includes: a power supply U for supplying power to the light emitting module 30; the controllable switch Q is disposed between the power source U and the light emitting module 30, and is configured to control self-turn-on or turn-off according to the analog control signal, wherein the controllable switch Q may be an NPN-type triode, the NPN-type triode includes a base B, a collector C, and an emitter E, the base B is connected to the output end of the conversion module 10, and the triode is controlled to turn on by the analog control signal output by the conversion module 10 to control the light emitting module 30 to emit light, or the triode is controlled to turn off, so as to control the light emitting module 30 not to emit light. The light emitting module 30 is embodied as a light emitting diode.

Fig. 3 is a structural diagram of a signal transmitting apparatus according to another embodiment of the present invention, since the initial input signal may be an analog signal or a digital signal, and the controllable switch Q needs to be controlled by the analog signal, as shown in fig. 3, the signal transmitting apparatus further includes: the output end of the pulse width modulation module 40 is connected to the conversion module 10, and is configured to convert an initial input signal (e.g., an analog signal detected by a sensor, a key input signal, etc.) into a digital signal, and output the digital signal to the conversion module 10.

Fig. 4 is a structural diagram of a pulse width modulation module according to an embodiment of the present invention, as shown in fig. 4, the pulse width modulation module 40 includes at least two modulation units 401 and at least one output terminal PIN, wherein each modulation unit 401 is connected to each output terminal PIN respectively; each output terminal is connected with the conversion module 10; for converting the initial input signal into a digital signal and transmitting the digital signal to the conversion module 10. The pulse width modulation module 40 further includes input terminals PIN1 corresponding to the number of the modulation units 401, and at least two modulation units 401 are connected to the input terminals PIN1 in a one-to-one correspondence. As shown in fig. 4, the pulse width modulation module 40 further includes: the key switches S are arranged between each modulation unit 401 and different output terminals PIN, and are used for respectively controlling the on-off between each modulation unit and different output terminals, so that whether each modulation unit works or not and the path of an output signal during working are controlled.

As shown in fig. 4, a unidirectional conducting element D is further disposed in front of each output terminal PIN for controlling current to conduct in a unidirectional manner, a cathode of each unidirectional conducting element D is connected to the output terminal PIN, and an anode is connected to a power supply through a resistor.

Example 3

This embodiment provides a signal receiving device, fig. 5 is a structural diagram of the signal receiving device according to the embodiment of the present invention, as shown in the figure, the device includes: the light receiving module 50 is disposed in the same propagation space as the light emitting module 30 in the above embodiment, and is used for receiving the light signal emitted by the light emitting module 30 and generating an analog electrical signal according to the light signal, in order to ensure that the light signal emitted by the light emitting module 30 is received by the light receiving module 50.

Fig. 6 is a schematic diagram of an optical signal transmission path between the light receiving module and the light emitting module according to the embodiment of the present invention, as shown in fig. 6, the emission angle of the visible light emitted from the light emitting module 30 is very small, and can be approximately considered as being perpendicular to the light receiving surface of the light receiving module 50, in which case the optical signal is sent directionally. In this case, the acceptance angle of the light receiving module 50 is also small, and directional acceptance is achieved. When the light receiving module 50 and the light emitting module 30 are fixed in direction and aligned, the transmission is directional. The optical signal received by the optical receiving module 50 contains both the light emitted directly by the optical transmitting module 30 and the light reflected by other objects, and is transmitted through the line-of-sight link.

Fig. 7 is a schematic diagram of an optical signal transmission path between an optical receiving module and an optical transmitting module according to another embodiment of the present invention, and as shown in fig. 7, when there is an obstacle or other condition between the optical receiving module 50 and the optical transmitting module 30, an optical signal transmitted by the optical transmitting module 30 cannot be directly received by the optical receiving module 50, and needs to be reflected by other objects, and is transmitted in a non-directional manner. The optical signals received by the optical receiving module 50 are all reflected by other objects, and are transmitted by a non-line-of-sight link when there is no light directly emitted by the optical transmitting module 30.

In consideration of the complex environment in the electric cabinet and the requirement for accuracy of signal transmission, in the specific implementation, it is preferable to use the directional line-of-sight link to send and receive optical signals, that is, the optical signals sent by the optical transmitter module 30 are transmitted to the surface of the optical receiver module 50 through the directional line-of-sight link, and the above transmission mode can be realized by performing PCB layout and electric wiring design of the electric cabinet, so that the optical receiver module 50 and the optical transmitter module 30 are directly opposite.

In order to restore the analog electrical signal, as shown in fig. 5, the signal receiving apparatus further includes an inverse conversion module 60 for restoring the analog electrical signal into a digital signal and outputting the digital signal.

The signal receiving device of this embodiment receives the optical signal that the optical transmission module sent through the optical receiving module to according to optical signal generation analog signal, through exporting behind the analog signal reduction digital signal of reverse conversion module, can realize wireless communication, avoided wired communication mode's the complicated and signal interference's of wiring problem.

Example 4

In this embodiment, another signal receiving apparatus is provided, in order to convert an optical signal into an analog electrical signal, the optical receiving module 50 includes: the photosensitive element, which may be a PIN photodiode, has a first end grounded, a second end connected to the inverse conversion module 60, and is turned on when receiving an optical signal and turned off when not receiving an optical signal. The inverse transformation module 60 outputs a high level signal when the photosensitive element is turned on, and outputs a low level signal when the photosensitive element is turned off. So as to convert the analog electric signal into discrete output high and low level signals, i.e. digital signals.

Fig. 8 is a structural diagram of the reverse conversion module according to the embodiment of the present invention, in order to realize the function of outputting a high level signal when the photosensitive element P is turned on, and outputting a low level signal when the photosensitive element P is turned off, as shown in fig. 8, the reverse conversion module 60 specifically includes: the comparator A has a first input terminal connected to a voltage source Vcc through a first resistor R1, a second input terminal connected to the voltage source Vcc through a second resistor R2, and a second input terminal connected to the photosensitive element P.

Specifically, the first input end of the comparator a is a non-inverting input end, the second input end is an inverting input end, when the photosensitive element P does not receive the optical signal, the photosensitive element P is turned off, the voltage at the inverting input end of the comparator a is a voltage value obtained by dividing the voltage output by the voltage source Vcc through the second resistor R2, the voltage input at the non-inverting input end of the comparator a is a voltage value obtained by dividing the voltage output by the voltage source Vcc through the first resistor R1, and by presetting the values of the first resistor R1 and the second resistor R2, when the photosensitive element P is turned off, the voltage input at the non-inverting input end of the comparator a is smaller than the voltage at the inverting input end, and the comparator a outputs a low level signal "0"; when the photosensitive element P receives an optical signal, the photosensitive element P is turned on, the inverting input terminal of the comparator is grounded, the voltage input by the non-inverting input terminal is still the voltage value of the voltage output by the voltage source Vcc after voltage division by the first resistor R1, the voltage input by the non-inverting input terminal of the comparator a is greater than the voltage of the inverting input terminal, the comparator a outputs a high level signal "1", and the low level signal "0" or the high level signal "1" output by the comparator a is output through the output port Rx. Through the scheme, the analog electric signal is restored into the digital signal, and the digital signal is consistent with the digital signal which is sent to the conversion module in the device and input by the conversion module.

In order to control the detection accuracy, the first resistor R1 is a variable resistor, the resistance of which is adjustable, and the magnitude of the voltage input to the non-inverting input terminal of the comparator a can be changed by adjusting the resistance of the first resistor R1, so as to change the detection accuracy, wherein the voltage input to the non-inverting input terminal of the comparator a increases as the resistance of the first resistor R1 decreases.

In order to facilitate the observation of whether the circuit of the reverse conversion module 60 is working normally, the reverse conversion module 60 further includes: the anode of the indicating element D1 is connected to the voltage source Vcc through the third resistor R3, and the cathode thereof is connected to the output terminal of the comparator a, for indicating the conducting state of the reverse converting module 60, so as to determine whether the circuit is working normally.

Example 5

The embodiment provides a communication device, which comprises a signal sending device and a signal receiving device in the above embodiments, the communication device is applied to an air conditioning unit, the layout of a PCB (printed Circuit Board) of an air conditioning controller requires rhythm, and the space needs miniaturization; and the drive circuit is used for directly controlling the luminous intensity of the LED to carry out communication between the main board MCU of the controller.

The main board MCU of each controller of the air conditioner includes a transmitting end (i.e., the signal transmitting apparatus in the above embodiment) and a receiving end (i.e., the signal receiving apparatus in the above embodiment), in addition to a power module, a minimum system, and the like.

Fig. 9 is a structural diagram of a communication apparatus according to an embodiment of the present invention, and as shown in fig. 9, the communication apparatus includes: the display device comprises a first main board MCU1 and a second main board MCU2, wherein the first main board MCU1 comprises a first transmitting end 11 and a second receiving end 12, the first transmitting end 11 comprises a light emitting diode 114, and the second receiving end 12 comprises a photodiode 121; the second main board MCU2 includes a first receiving terminal 21 and a second transmitting terminal 22, wherein the first receiving terminal 21 includes a photodiode 211, and the second transmitting terminal 22 includes a light emitting diode 224.

Fig. 10 is a schematic diagram of an operation of a communication device according to an embodiment of the present invention, and as shown in fig. 10, the first sending end 11 further includes: a PWM modulation circuit 111 (i.e. the pulse width modulation module 40 in the above embodiment), a DAC digital-to-analog conversion chip 112 (i.e. the conversion module 10 in the above embodiment), a dc source driving circuit 113 (i.e. the driving module 20 in the above embodiment), and a light emitting diode 114 (i.e. the light emitting module 30 in the above embodiment), wherein the dc source driving circuit of the present embodiment includes an NPN type triode as shown in the above-mentioned fig. 2.

When the air conditioning unit works, analog quantity and digital quantity received by a detection element (including a sensor and a key switch) are transmitted to each mainboard MCU, the MCU carries out code modulation through a PWM modulation circuit 111 in the MCU, digital-to-analog conversion is carried out on a modulated signal through a DAC digital-to-analog conversion chip 112 in the MCU, and the converted analog signal is output to a base electrode of a triode in a direct current source driving circuit 113 to control whether a light emitting diode 114 emits light or not, and a light signal generated when the light emitting diode 114 emits light is emitted to a transmission space.

The MCU may be involved in several user parameters, debugging parameter selection, for example: the type of the electromagnetic valve, the selection of the motor, the preset function of the air conditioner compressor and the like need to be set through a key, a commonly used PWM (pulse width modulation) circuit is connected with an I/O (input/output) port on the MCU through two output terminals PIN1 and three input terminals PIN1 as shown in the figure 4 mentioned above, the key can generate pulses when being pressed, the modulation mode defines code elements by the existence of the pulses, 1 is a high level signal, 0 is a low level signal, binary digital signals 0 and 1 are subjected to digital-to-analog conversion through a DAC (digital-to-analog) conversion chip in the MCU, analog signals generated after conversion are output to a base electrode of a triode of a direct-current source driving circuit to control the light emitting diode to emit light or not to emit light, and light signals generated when the light emitting diode emits light to a propagation space.

The first receiving end 21 includes a photodiode 211 (i.e., the light receiving module 50 in the above embodiment) and a demodulation circuit 212 (i.e., the inverse conversion module 60 in the above embodiment), the light signal transmitted through the propagation space is collected on the surface of the photo diode 211 in the first receiving end 21, the photo diode 211 performs a photo-electric conversion on the light signal, the photo diode 212 processes the light signal to output a digital signal through the demodulation circuit 212, and the digital signal finally transmits the signal to the main control unit 23 through an ADC analog-to-digital conversion chip (not shown) inside the second main board MCU2, thereby completing the optical communication between different MCUs.

The communication equipment of the embodiment changes the communication mode of the MCU of the controller of the air conditioner, directly transmits optical signals in the air, does not need transmission media of wired channels such as communication lines, optical fibers and the like, can operate for a long time in an electromagnetic interference environment, an electromagnetic sensitive environment and an electromagnetic shielding environment, and realizes stable communication among the controllers of the air conditioner.

Example 6

This embodiment provides an air conditioning unit, which includes the communication device described in embodiment 5, and is configured to implement wireless communication between different controllers, solve the problem of wiring, and enable the air conditioning unit to be used in more complex scenarios.

The above-described embodiments of the apparatus are merely illustrative, wherein the modules described as separate parts may or may not be physically separate, and the parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A signal transmission apparatus, characterized in that the signal transmission apparatus comprises:

2. The apparatus of claim 1, wherein the drive module comprises:

the power supply is used for supplying power to the light emitting module;

3. The apparatus of claim 1, wherein the light emitting module is a light emitting diode.

4. The apparatus of claim 1, wherein the signal transmission apparatus further comprises:

5. The apparatus of claim 4, wherein the pulse width modulation module further comprises:

6. A signal receiving apparatus, characterized in that the signal receiving apparatus comprises:

7. The apparatus of claim 6, wherein the light receiving module comprises:

8. The apparatus of claim 7, wherein the inverse transform module is specifically configured to:

when the photosensitive element is conducted, outputting a high level signal;

and when the photosensitive element is cut off, outputting a low level signal.

9. The apparatus of claim 8, wherein the inverse transform module comprises:

10. The apparatus of claim 9, wherein the first resistance is a variable resistance.

11. The apparatus of claim 9, wherein the inverse transform module further comprises:

12. A communication apparatus, characterized in that it comprises the signal transmission device of any one of claims 1 to 5 and the signal reception device of any one of claims 6 to 11.

13. An air conditioning assembly characterized in that it comprises a communication device according to claim 12.