CN110880946A - Communication circuit for controlling optical fiber positioning unit of telescope - Google Patents
Communication circuit for controlling optical fiber positioning unit of telescope Download PDFInfo
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- CN110880946A CN110880946A CN201911293579.4A CN201911293579A CN110880946A CN 110880946 A CN110880946 A CN 110880946A CN 201911293579 A CN201911293579 A CN 201911293579A CN 110880946 A CN110880946 A CN 110880946A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B3/00—Line transmission systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
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- H—ELECTRICITY
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- H04B3/00—Line transmission systems
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Abstract
The invention provides a communication circuit for controlling a telescope optical fiber positioning unit, which is applied to the technical field of communication and comprises a main node coupling circuit and at least one slave node separation circuit, wherein the slave node separation circuits are arranged in one-to-one correspondence with slave controllers, the main node coupling circuit couples a control signal sent by the main controller with direct current voltage output by a direct current power supply to obtain a coupled control signal, the coupled control signal is transmitted through a direct current power line, each slave node separation circuit separates the coupled control signal to respectively obtain the control signal and the direct current voltage, the separated control signal is output to the corresponding slave controller, and the separated direct current voltage is output to the corresponding load. Through this communication circuit, can replace the wireless transmission network who uses among the prior art, realize control signal's transmission based on the direct current power line, improve control signal transmission's stability.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a communication circuit for controlling an optical fiber positioning unit of a telescope.
Background
ZigBee is a wireless network protocol for low-speed short-distance transmission, is suitable for a series of electronic component devices with short transmission range and low data transmission rate, and in a control system constructed based on ZigBee, information transmission between a plurality of slave controllers can be realized through one master controller. Taking the LAMOST telescope as an example, four thousand optical fibers are placed on the focal plane of the LAMOST telescope, and in the observation process, the position of each optical fiber needs to be adjusted according to the observation requirement to collect the spectrum of a remote celestial body, and therefore, each optical fiber of the LAMOST telescope is moved by driving two stepping motors by one optical fiber positioning unit.
In the actual control of each optical fiber, a direct current power supply provides a driving power supply for the optical fiber driving unit and the stepping motor of each optical fiber through a direct current power line, and meanwhile, a master controller transmits a control signal to each optical fiber driving unit serving as a slave controller based on a ZigBee wireless network.
However, in practical applications, the transmission of the control signal of the LAMOST telescope optical fiber positioning unit using the ZigBee wireless network may cause unstable transmission or even transmission failure of the control signal, and therefore, how to provide a more stable communication method to ensure reliable transmission of the control signal becomes one of the problems to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a communication circuit for controlling an optical fiber positioning unit of a telescope, which replaces a wireless network used in the prior art, and realizes transmission of a control signal based on a dc power line, thereby improving stability of transmission of the control signal and ensuring reliable transmission of the control signal, and the specific scheme is as follows:
the invention provides a communication circuit for controlling a telescope optical fiber positioning unit, which comprises: a master node coupling circuit and at least one slave node isolation circuit, and one of the slave node isolation circuits corresponds to a slave controller, wherein,
the main node coupling circuit comprises a direct current input end, a composite output end and an instruction receiving end, wherein the direct current input end is connected with a direct current power supply, the composite output end is connected with one end of a direct current power line, and the instruction receiving end is connected with the main controller;
the slave node separation circuit comprises a composite input end, an instruction output end and a direct current output end, wherein the composite input end is connected with the other end of the direct current power line, the instruction output end is connected with a corresponding slave controller, and the direct current output end is connected with a corresponding load;
the master node coupling circuit is used for coupling the control signal output by the master controller with the direct-current voltage output by the direct-current power supply and outputting the coupled control signal to each slave node separation circuit through the direct-current power line;
and the slave node separation circuit is used for separating the coupled control signals, outputting the separated control signals to a corresponding slave controller through the instruction output end, and outputting the separated direct-current voltage to a corresponding load through the direct-current output end.
Optionally, the master node coupling circuit includes: an inverting amplification circuit and at least one coupling circuit, wherein,
a first input end of the reverse amplification circuit is used as an instruction receiving end of the main node coupling circuit, a second input end of the reverse amplification circuit is connected with the direct-current power supply, and an output end of the reverse amplification circuit is connected with the first input end of the coupling circuit;
the second input end of the coupling circuit is used as the direct current input end of the main node coupling circuit, and the output end of the coupling circuit is used as the composite output end of the main node coupling circuit.
Optionally, the inverting amplifier circuit includes: a first voltage dividing resistor, a second voltage dividing resistor, a current limiting resistor, and a first switch tube,
one end of the first voltage-dividing resistor is used as a first input end of the reverse amplification circuit, and the other end of the first voltage-dividing resistor is connected with one end of the second voltage-dividing resistor;
the other end of the second voltage-dividing resistor is grounded;
one end of the current-limiting resistor is used as a second input end of the reverse amplification circuit, and the other end of the current-limiting resistor is connected with the first end of the first switching tube;
the control end of the first switch tube is connected with the series connection point of the first voltage-dividing resistor and the second voltage-dividing resistor, and the second end of the first switch tube is grounded;
and the series connection point of the current-limiting resistor and the first switching tube is used as the output end of the reverse amplification circuit.
Optionally, the coupling circuit includes: a bleeder resistor and a second switching tube, wherein,
one end of the bleeder resistor is connected with the control end of the second switch tube, and the other end of the bleeder resistor is connected with the first end of the second switch tube;
the control end of the second switch tube is used as the first input end of the coupling circuit, the first end of the second switch tube is used as the second input end of the coupling circuit, and the second end of the second switch tube is used as the output end of the coupling circuit.
Optionally, the slave node separation circuit includes: a separation circuit and a dc restoration circuit, wherein,
the connection point of the input end of the separation circuit and the input end of the direct current recovery circuit is used as the composite input end of the slave node separation circuit;
the output end of the separation circuit is used as the instruction output end of the slave node separation circuit;
and the output end of the direct current recovery circuit is used as the direct current output end of the slave node separation circuit.
Optionally, the separation circuit includes: a first separation resistance and a second separation resistance, wherein,
one end of the first separation resistor is used as the input end of the separation circuit, and the other end of the first separation resistor is grounded through the second separation resistor;
the series connection point of the first separation resistor and the second separation resistor serves as an output end of the separation circuit.
Optionally, the dc restoration circuit includes: a first diode and a plurality of capacitors, wherein,
all the capacitors are connected in parallel to form a parallel branch;
one end of the first diode is used as the input end of the direct current recovery circuit, and the other end of the first diode is grounded through the parallel branch;
and the series connection point of the first diode and the parallel branch is used as the output end of the direct current recovery circuit.
Optionally, the slave node separation circuit further includes: and the second diode is arranged between the composite input end and a connection point of the input end of the separation circuit and the input end of the direct current recovery circuit.
Optionally, the slave node separation circuit further includes: a switch and a fuse disposed between the composite input terminal and the second diode, and the switch and the fuse are connected in series.
Optionally, the slave node separation circuit provides power to the slave controller.
Based on the above, the present invention provides a communication circuit for telescope optical fiber positioning unit control, comprising a master node coupling circuit and at least one slave node splitting circuit, the slave node separation circuits are arranged in one-to-one correspondence with the slave controllers, the master controller sends control signals to the master node coupling circuit, the master node coupling circuit couples the control signals sent by the master controller with the direct-current voltage output by the direct-current power supply to obtain the coupled control signals, and transmits the coupled control signal through the DC power line, after each slave node separation circuit receives the coupled control signal through the DC power line, separating the coupled control signals to respectively obtain the control signal sent by the main controller and the DC voltage output by the DC power supply, and outputting the separated control signal to a corresponding slave controller, and outputting the separated direct current voltage to a corresponding load. The communication circuit for controlling the telescope optical fiber positioning unit can replace a wireless transmission network used in the prior art, realizes the transmission of control signals based on a direct current power line, effectively improves the stability of the transmission of the control signals and ensures the reliable transmission of the control signals.
Furthermore, because the transmission of the control signal is realized based on a direct current power line, compared with a wireless transmission mode, the control signal can not generate extra electromagnetic interference, and therefore, the control signal transmission method is also suitable for other application scenes with strict requirements on electromagnetic environment, and has wider application range.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of an application scenario of a communication circuit for controlling a telescope optical fiber positioning unit according to an embodiment of the present invention;
fig. 2 is a circuit topology diagram of a master node coupling circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a waveform variation process of a control signal according to an embodiment of the present invention;
FIG. 4 is a circuit topology diagram of another master node coupling circuit provided by an embodiment of the present invention;
fig. 5 is a circuit topology diagram of a slave node separation circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Optionally, referring to fig. 1, fig. 1 is a schematic view of an application scenario of a communication circuit for controlling a telescope optical fiber positioning unit according to an embodiment of the present invention, and fig. 1 shows a connection relationship between the communication circuit for controlling the telescope optical fiber positioning unit according to the embodiment of the present invention and a dc power transmission line, a master controller, a slave controller, and a load when a control signal is transmitted. Specifically, the communication circuit for controlling the telescope optical fiber positioning unit provided by the embodiment of the present invention includes: a master node coupling circuit 10 and at least one slave node splitting circuit 20 (shown in fig. 1 as slave node splitting circuit 1, slave node splitting circuit 2, and slave node splitting circuit n), wherein,
in the application scenario shown in fig. 1, the direct current input end of the master node coupling circuit 10 is connected to the output end of the direct current power supply 30, the composite output end of the master node coupling circuit 10 is connected to one end of the direct current power line 70, that is, the master node coupling circuit 10 is connected in series between the direct current power supply 30 and the direct current power line 70, and the electric energy output by the direct current power supply 30 is transmitted through the direct current power line 70 after passing through the master node coupling circuit 10. Further, the instruction receiving end of the master node coupling circuit 10 is connected to the master controller 40 to receive the control signal output from the master controller 40.
Based on the above connection relationship, the master node coupling circuit 10 couples the control signal output by the master controller 40 with the dc voltage output by the dc power supply 30 to obtain a coupled control signal, and then transmits the coupled control signal through the dc power line 70.
Slave node splitting circuit 20 includes a composite input, a command output, and a dc output. In specific use, the composite input end of the slave node separation circuit 20 is connected with the other end of the direct current power line 70, and receives the coupled control signal output by the composite output end of the master node coupling circuit 10 through the direct current power line 70; the command outputs of the slave node isolation circuits 20 are connected to respective slave controllers 50, and the dc outputs of the slave node isolation circuits 20 are correspondingly connected to respective loads 60.
Based on the connection relationship between the slave node separation circuit 20 and the dc power line 70, the slave controller 50, and the load 60, it can be seen that the slave node separation circuit 20 according to the embodiment of the present invention is configured to separate the coupled control signal received from the dc power line 70, separate the control signal to obtain the control signal originally sent by the master controller 40, and output the control signal to the corresponding slave controller 50 through the command output terminal. After receiving the control signal sent by the master controller 40, the slave controller 50 controls the working process of the corresponding load 60 or other controlled objects controlled by the slave controller 50 according to the specific content of the control signal, and completes the transmission process of the control information based on the direct current power line; meanwhile, when the master node coupling circuit 10 couples the control signal with the dc voltage, the waveform of the dc voltage is changed, so that the dc voltage needs to be restored before the dc voltage is applied to a specific load, that is, the slave node separation circuit 20 is further configured to output the separated dc voltage to the corresponding load 60 through the dc output terminal, so as to ensure normal power supply of the load 60.
In a specific application, the number of slave node isolation circuits 20 is required to be set according to the number of loads 60 and the number of slave controllers 50, and when a plurality of slave node isolation circuits 20 are included, the composite input end of each slave node isolation circuit 20 is connected in parallel to the other end of the dc power line 70. In most cases, the slave node disconnecting circuits 20 are provided in one-to-one correspondence with the slave controllers 50, that is, one slave node disconnecting circuit 20 is connected to one slave controller 50. Alternatively, in order to improve the power supply stability of the loads 60, the slave node separation circuit 20 and the loads 60 may be arranged in a one-to-one manner, that is, one slave node separation circuit 20 supplies power to only one load 60. Of course, by setting the power relationship between the slave node separation circuit 20 and the connected loads 60, it is also possible to realize that one slave node separation circuit 20 supplies power to more than one load 60 at the same time, and the number of loads connected to the slave node separation circuit 20 is not particularly limited in the present invention.
When the method is applied to control of each optical fiber in the aforementioned LAMOST telescope, the slave controller in the embodiment of the present invention may be each light driving unit, and the dc output terminal of the slave node separation circuit is directly connected to the driving chip of the stepping motor, and further the driving chip drives the stepping motor to operate.
In summary, in the communication circuit for controlling the telescope optical fiber positioning unit according to the embodiments of the present invention, the master node coupling circuit couples the control signal of the master controller with the dc voltage on the dc power line, and the slave node separation circuits connected to the downstream of the dc power line separate the received coupled control signal by transmitting the coupled control signal through the dc power line, so as to obtain the control signal originally sent by the master controller, and at the same time, restore the waveform of the dc voltage to the waveform of the voltage output by the dc power supply, that is, while implementing the transmission of the control signal based on the dc power line, the normal transmission and use of the dc power is not affected. Therefore, the communication circuit for controlling the telescope optical fiber positioning unit provided by the embodiment of the invention can replace a wireless transmission network used in the prior art, realize the transmission of control signals based on a direct current power line and effectively improve the stability of the transmission of the control signals.
Furthermore, because the transmission of the control signal is realized based on a direct current power line, compared with a wireless transmission mode, the control signal can not generate extra electromagnetic interference, and therefore, the control signal transmission method is also suitable for other application scenes with strict requirements on electromagnetic environment, and has wider application range.
Optionally, an optional construction manner of the master node coupling circuit is provided in the embodiment of the present invention. Specifically, referring to fig. 2, fig. 2 is a circuit topology diagram of a master node coupling circuit according to an embodiment of the present invention, where the master node coupling circuit according to the embodiment of the present invention includes: an inverting amplification circuit and at least one coupling circuit (one shown), wherein,
the first input end of the reverse amplification circuit is used as an instruction receiving end of the main node coupling circuit and is connected with the main controller, the second input end of the reverse amplification circuit is connected with the direct-current power supply, the output end of the reverse amplification circuit is connected with the first input end of the coupling circuit, and the level output to the first input end of the coupling circuit is adjusted by matching with the direct-current voltage of the direct-current power supply received by the second input end according to the difference of control signals received by the first input end.
Specifically, in the embodiment shown in fig. 2, the inverting amplifier circuit specifically includes a first voltage-dividing resistor R1, a second voltage-dividing resistor R2, a current-limiting resistor R3, and a first switch Q1, wherein,
one end of the first voltage-dividing resistor R1 is used as a first input end of the inverting amplifier circuit, and is connected to the main controller (in the embodiment shown in fig. 2, a specific connection pin of the main controller is shown as MASTER-TX), and the other end of the first voltage-dividing resistor R1 is connected to one end of the second voltage-dividing resistor R2, that is, the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 are connected in series, and the other end of the second voltage-dividing resistor R2 is connected to ground.
One end of the current limiting resistor R3 is connected to the dc power Vin as the second input end of the inverting amplifier circuit, and the other end of the current limiting resistor R3 is connected to the first end of the first switch Q1. Optionally, in the embodiment of the present invention, the first switch Q1 is an NMOS transistor, and a drain of the first switch Q1 is connected to the dc power Vin through a current limiting resistor R3. The current limiting resistor R3 is mainly used for adjusting the current value output to the coupling circuit, specifically, the current limiting resistor R3 can be obtained by calculating the direct-current power supply voltage Vin/R3, and under the condition that the direct-current power supply voltage is constant, the resistance value of the current discharging resistor R3 is changed, so that the current value output to the coupling circuit can be adjusted.
Further, a control terminal of the first switch Q1 is connected to a series connection point of the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2, and a second terminal of the first switch Q1 is grounded. In the embodiment of the present invention, the source of the first switch transistor Q1 is grounded. According to the connection relationship shown in fig. 2, the control terminal of the first switch tube Q1 obtains different voltage values after voltage division due to the difference of the output levels of the MASTER controller pin MASTER-TX, so as to control the on state of the first switch tube Q1.
The series connection point of the current limiting resistor R3 and the first switch tube Q1 serves as the output end of the reverse amplification circuit and is connected with the input end of the coupling circuit.
As mentioned above, the first input terminal of the coupling circuit is connected to the output terminal of the inverting amplifier circuit, the second input terminal of the coupling circuit is used as the DC input terminal of the master node coupling circuit and is connected to the DC power supply, and the output terminal of the coupling circuit is used as the master node coupling circuitIs connected to the dc power line, and fig. 2 also shows that the final output of the master node coupling circuit is VLout。
Specifically, in the embodiment shown in fig. 2, the coupling circuit specifically includes a bleeder resistor R4 and a second switching tube Q2, wherein,
one end of the leakage resistor R4 is connected to the control end of the second switch tube Q2, and the other end of the leakage resistor R4 is connected to the first end of the second switch tube Q2. The second switch Q2 is implemented by a PMOS transistor, in which case the bleeder resistor R4 is connected in parallel between the source and the gate of the second switch Q2. The leakage resistor R4 is mainly used for improving the turn-off characteristic of the PMOS tube, improving the falling edge of a signal and ensuring the switching speed of the second switching tube Q2.
Further, a control terminal, i.e., a gate, of the second switch Q2 is connected to the output terminal of the inverting amplifier circuit as a first input terminal of the coupling circuit, a first terminal of the second switch Q2 is connected to the dc power Vin as a second input terminal of the coupling circuit, when a PMOS transistor is selected, a source of the second switch Q2 is connected to the dc power, and a second terminal of the second switch Q2, i.e., a drain of the PMOS transistor is connected to the output terminal of the coupling circuit as an output terminal of the main node coupling circuit, i.e., an output terminal V of the main node coupling circuitLoutIs connected with a direct current power line.
The working process of the master node coupling circuit provided by the embodiment of the present invention is described below with reference to the example shown in fig. 2:
assuming that the dc voltage value of the dc power Vin is 12V, the control signal output by the main controller is represented by a pulse signal composed of high and low levels according to a preset rule, and the low level of the pulse signal is 0V and the high level is 3.3V.
When the control signal output by the control signal output end of the main controller is low level 0V, the voltage of the series connection point of the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 is 0V, the first switch tube Q1 is in an off state, the output voltage of the directional amplifying circuit is 12V of the power supply voltage of the dc power supply, at this time, the voltage Vgs between the gate and the source of the second switch tube Q2(PMOS tube) is 0V, the second switch tube Q2 is in an off state, and the final output of the main node coupling circuit is low level 0V.
Correspondingly, when the control signal output by the control signal output end of the main controller is at a high level of 3.3V, a voltage value divided according to a preset voltage division ratio exists at the series connection point of the first voltage division resistor R1 and the second voltage division resistor R2, the first switch tube Q1 is in a conducting state, and the direct current power supply is grounded with the first switch tube Q1 through the current limiting resistor R3. Since the self resistance of the first switch Q1 is low when it is in the on state, the input voltage at the first input terminal of the coupling circuit, i.e. the gate of the second switch Q2, can be considered as 0V, and the voltage Vgs between the gate and the source of the second switch Q2 is-Vin, in this case, the second switch Q2 is in the on state, and the final output voltage of the master node coupling circuit is 12V at high level.
According to the above, the reverse amplification circuit is matched with the coupling circuit, and couples the control signal sent by the main controller with the direct-current voltage output by the direct-current power supply, so that the control signal is transmitted through the direct-current power line, and meanwhile, the control signal output by the main controller can be amplified.
Optionally, referring to fig. 3, fig. 3 is a schematic diagram of a waveform change process of the control signal in the embodiment of the present invention, as shown in fig. 3, the control signal output by the controller is composed of a low level of 0V and a high level of 3.3V, and the coupled control signal obtained after amplification is changed to be composed of a low level of 0V and a high level of 12V.
Furthermore, load current is output by the direct current power supply, so that the master controller can simultaneously control dozens of slave controllers and simultaneously supply power for dozens of loads, and the load carrying capacity is greatly improved.
Optionally, in order to further increase the transmission capability of the master node coupling circuit, a plurality of coupling circuits may be further provided in the master node coupling circuit, as shown in fig. 4, the master node coupling circuit in the embodiment shown in fig. 4 includes two coupling circuits, the circuit structures of the two coupling circuits are completely the same and are in a parallel relationship, and a connection relationship of another coupling circuit shown in fig. 4 is not described here, and the implementation may specifically refer to the above contents.
Optionally, the embodiment of the present invention further provides an optional construction manner of the slave node separation circuit. Specifically, referring to fig. 5, fig. 5 is a circuit topology diagram of a slave node separation circuit according to an embodiment of the present invention, where the slave node separation circuit according to the embodiment of the present invention includes: a separation circuit and a dc restoration circuit, wherein,
the input end of the separation circuit is connected with the input end of the direct current recovery circuit, and the connection point of the input end of the separation circuit and the input end of the direct current recovery circuit is used as the composite input end of the slave node separation circuit to be connected with the direct current power line.
The output end of the direct current recovery circuit is used as the direct current output end of the slave node separation circuit, is connected with a corresponding load and supplies power to the load.
Specifically, in the embodiment shown in fig. 5, the separation circuit specifically includes: a first separation resistor R5 and a second separation resistor R6. One end of the first separation resistor R5 is used as the input end of the separation circuit and is connected with the input end of the direct current recovery circuit, namely, the direct current power line; the other end of the first separation resistor R5 is grounded via a second separation resistor R6. The series connection point of the first separating resistor R5 and the second separating resistor R6 serves as the output terminal of the separating circuit.
Based on the above connection relationship, after the separation circuit receives the coupled control signal transmitted by the dc power line, the voltage division function of the separation circuit reduces the amplified control signal to the high level voltage value when the main controller actually outputs the control signal, and it is conceivable that the low level of the control signal is 0V after coupling, and is also 0V after separation.
In the previous example, the high level included in the control signal output by the main controller is 3.3V, and becomes 12V after coupling, and at this time, the resistance values of the first separation resistor R5 and the second separation resistor R6 can be determined according to the high level voltage ratio before and after coupling. Specifically, the first separation resistor R5 and the second separation resistor R6 may be selected according to the following formula:
with reference to the circuit structure shown in fig. 5 and the above formula, a signal receiving terminal (shown as MCU-RXD in the figure) of the slave controller is connected to the series connection point of the first separation resistor R5 and the second separation resistor R6, the read level value is the same as the voltage drop across the second separation resistor R6, and the separation of the control signals can be achieved by adjusting the resistance ratio of the first separation resistor R5 to the second separation resistor R6.
Specifically, in the embodiment shown in fig. 5, the dc restoring circuit specifically includes: a first diode D1, and a plurality of capacitors (capacitors C1, C2, and C3 are shown by way of example), wherein,
the capacitors are connected in parallel to form a parallel branch, one end of a first diode D1 is used as the input end of the direct current recovery circuit and is connected with the direct current power line to receive the coupled control signal transmitted by the direct current power line, and the other end of the first diode D1 is grounded through the parallel branch; the series connection point of the first diode D1 and the parallel branch serves as the output terminal of the dc restoration circuit, which outputs the restored dc power to supply the load connected to the dc output terminal VBB of the node separation circuit.
Optionally, in order to simplify the overall layout of the circuit structure, the dc output VBB of the slave node separation circuit may also supply power to the corresponding slave controller at the same time. It is conceivable that the voltage of the dc power supply output from the dc output terminal of the node separation circuit is higher than the operating voltage of the slave controller in most cases, and therefore, in order to ensure the normal operation of the slave controller, a corresponding step-down circuit may be further provided between the dc output terminal of the node separation circuit and the slave controller, and the operating voltage is supplied to the slave controller through the step-down circuit.
For the selection of the voltage reduction circuit, the implementation manner in the prior art may be referred to, and the embodiment of the present invention does not limit this.
Optionally, in the embodiment shown in fig. 5, the slave node splitting circuit further comprises a second diode D2 disposed between the composite input and the junction of the input of the splitting circuit and the input of the dc restoring circuit. Specifically, the anode of the second diode D2 is close to the composite input terminal of the node separation circuit, i.e., close to the dc power line side. Interference of the slave node separation circuit to the direct current power line can be isolated through the second diode D2, and mutual independence between the slave node separation circuits is guaranteed.
Further, in the embodiment shown in fig. 5, the slave node disconnecting circuit further includes: a SWITCH and a fuse F1 disposed between the composite input terminal and the second diode D2, and the SWITCH and the fuse F1 are connected in series. Through setting up the switch, the relation of connection of corresponding slave node separating circuit and direct current power line of control that can be nimble breaks away from the connection of node separating circuit and direct current power line when needs. The safety of the slave node separation circuit can be improved by arranging the fuse, and the slave node separation circuit and a slave controller and a load connected with the slave node separation circuit are prevented from being burnt by overcurrent.
It should be noted that, according to the coupling and splitting process of the control signals, the communication circuit for controlling the telescope optical fiber positioning unit according to the embodiment of the present invention is mainly applied to the transmission of serial signals, and the master controller and each slave controller should select a controller having a serial signal transmitting port and a serial signal receiving port.
Furthermore, the method for the master controller to send the control signal, the communication protocol followed, the control signal sending period, etc. can be executed by referring to the sending mode of the control signal in the prior art, and the control signal sent by the master controller at least comprises an address bit, a data bit and a check bit, all slave node separation circuits connected to the direct current power line can receive the coupled control signal and send the separated control signal to the corresponding slave controllers, each slave controller judges whether the received control signal needs to respond or not according to the address information in the received control signal, and if so, the load is controlled to operate in a specified state according to the control information contained in the data bit in the control signal; accordingly, if the received control instruction does not need to correspond, no operation is performed.
The embodiment of the invention does not limit the process of sending the control signal by the main controller and analyzing the control signal by the slave controller and controlling the corresponding load action according to the control signal, and can be executed by referring to the implementation mode in the prior art.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A communications circuit for control of a telescopic fiber positioning unit, comprising: a master node coupling circuit and at least one slave node isolation circuit, and one of the slave node isolation circuits corresponds to a slave controller, wherein,
the main node coupling circuit comprises a direct current input end, a composite output end and an instruction receiving end, wherein the direct current input end is connected with a direct current power supply, the composite output end is connected with one end of a direct current power line, and the instruction receiving end is connected with the main controller;
the slave node separation circuit comprises a composite input end, an instruction output end and a direct current output end, wherein the composite input end is connected with the other end of the direct current power line, the instruction output end is connected with a corresponding slave controller, and the direct current output end is connected with a corresponding load;
the master node coupling circuit is used for coupling the control signal output by the master controller with the direct-current voltage output by the direct-current power supply and outputting the coupled control signal to each slave node separation circuit through the direct-current power line;
and the slave node separation circuit is used for separating the coupled control signals, outputting the separated control signals to a corresponding slave controller through the instruction output end, and outputting the separated direct-current voltage to a corresponding load through the direct-current output end.
2. The communication circuit for telescopic fiber positioning unit control of claim 1, wherein the primary node coupling circuit comprises: an inverting amplification circuit and at least one coupling circuit, wherein,
a first input end of the reverse amplification circuit is used as an instruction receiving end of the main node coupling circuit, a second input end of the reverse amplification circuit is connected with the direct-current power supply, and an output end of the reverse amplification circuit is connected with the first input end of the coupling circuit;
the second input end of the coupling circuit is used as the direct current input end of the main node coupling circuit, and the output end of the coupling circuit is used as the composite output end of the main node coupling circuit.
3. The communications circuit for telescopic fiber positioning unit control of claim 2, wherein the reverse amplification circuit comprises: a first voltage dividing resistor, a second voltage dividing resistor, a current limiting resistor, and a first switch tube,
one end of the first voltage-dividing resistor is used as a first input end of the reverse amplification circuit, and the other end of the first voltage-dividing resistor is connected with one end of the second voltage-dividing resistor;
the other end of the second voltage-dividing resistor is grounded;
one end of the current-limiting resistor is used as a second input end of the reverse amplification circuit, and the other end of the current-limiting resistor is connected with the first end of the first switching tube;
the control end of the first switch tube is connected with the series connection point of the first voltage-dividing resistor and the second voltage-dividing resistor, and the second end of the first switch tube is grounded;
and the series connection point of the current-limiting resistor and the first switching tube is used as the output end of the reverse amplification circuit.
4. The communication circuit for telescopic fiber positioning unit control of claim 2, wherein the coupling circuit comprises: a bleeder resistor and a second switching tube, wherein,
one end of the bleeder resistor is connected with the control end of the second switch tube, and the other end of the bleeder resistor is connected with the first end of the second switch tube;
the control end of the second switch tube is used as the first input end of the coupling circuit, the first end of the second switch tube is used as the second input end of the coupling circuit, and the second end of the second switch tube is used as the output end of the coupling circuit.
5. The communications circuit for telescopic fiber positioning unit control of claim 1, wherein the slave node detach circuit comprises: a separation circuit and a dc restoration circuit, wherein,
the connection point of the input end of the separation circuit and the input end of the direct current recovery circuit is used as the composite input end of the slave node separation circuit;
the output end of the separation circuit is used as the instruction output end of the slave node separation circuit;
and the output end of the direct current recovery circuit is used as the direct current output end of the slave node separation circuit.
6. The communication circuit for telescopic fiber positioning unit control of claim 5, wherein the splitting circuit comprises: a first separation resistance and a second separation resistance, wherein,
one end of the first separation resistor is used as the input end of the separation circuit, and the other end of the first separation resistor is grounded through the second separation resistor;
the series connection point of the first separation resistor and the second separation resistor serves as an output end of the separation circuit.
7. The communication circuit for telescopic fiber positioning unit control of claim 5, wherein the dc restoration circuit comprises: a first diode and a plurality of capacitors, wherein,
all the capacitors are connected in parallel to form a parallel branch;
one end of the first diode is used as the input end of the direct current recovery circuit, and the other end of the first diode is grounded through the parallel branch;
and the series connection point of the first diode and the parallel branch is used as the output end of the direct current recovery circuit.
8. The communications circuit for telescopic fiber positioning unit control of claim 5, wherein the slave node detach circuit further comprises: and the second diode is arranged between the composite input end and a connection point of the input end of the separation circuit and the input end of the direct current recovery circuit.
9. The communications circuit for telescopic fiber positioning unit control of claim 8, wherein the slave node detach circuit further comprises: a switch and a fuse disposed between the composite input terminal and the second diode, and the switch and the fuse are connected in series.
10. The communication circuit for telescopic optical fiber positioning unit control of any of claims 1-9, wherein the slave node detach circuit provides power to the slave controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911293579.4A CN110880946A (en) | 2019-12-16 | 2019-12-16 | Communication circuit for controlling optical fiber positioning unit of telescope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911293579.4A CN110880946A (en) | 2019-12-16 | 2019-12-16 | Communication circuit for controlling optical fiber positioning unit of telescope |
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| CN110880946A true CN110880946A (en) | 2020-03-13 |
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| CN201911293579.4A Pending CN110880946A (en) | 2019-12-16 | 2019-12-16 | Communication circuit for controlling optical fiber positioning unit of telescope |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111681407A (en) * | 2020-06-17 | 2020-09-18 | 恒为科技（上海）股份有限公司 | Remote control method, device and system for robot |
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2019
- 2019-12-16 CN CN201911293579.4A patent/CN110880946A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111681407A (en) * | 2020-06-17 | 2020-09-18 | 恒为科技（上海）股份有限公司 | Remote control method, device and system for robot |
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