CN109491228B - Design method of pointer type regional clock movement - Google Patents
Design method of pointer type regional clock movement Download PDFInfo
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- CN109491228B CN109491228B CN201811531606.2A CN201811531606A CN109491228B CN 109491228 B CN109491228 B CN 109491228B CN 201811531606 A CN201811531606 A CN 201811531606A CN 109491228 B CN109491228 B CN 109491228B
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- 238000013461 design Methods 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 72
- 230000009347 mechanical transmission Effects 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 239000007769 metal material Substances 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 5
- 230000008878 coupling Effects 0.000 claims description 22
- 238000010168 coupling process Methods 0.000 claims description 22
- 238000005859 coupling reaction Methods 0.000 claims description 22
- 238000004891 communication Methods 0.000 claims description 19
- 239000013078 crystal Substances 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 19
- 230000007958 sleep Effects 0.000 claims description 18
- 230000000087 stabilizing effect Effects 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 5
- 230000006641 stabilisation Effects 0.000 claims description 5
- 238000011105 stabilization Methods 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000002618 waking effect Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 3
- 230000008713 feedback mechanism Effects 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000012937 correction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000010453 quartz Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
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- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
- G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
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- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C11/00—Synchronisation of independently-driven clocks
- G04C11/04—Synchronisation of independently-driven clocks over a line
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/14—Setting the time according to the time information carried or implied by the radio signal the radio signal being a telecommunication standard signal, e.g. GSM
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Abstract
The invention discloses a design method of a pointer type regional clock movement, and relates to the technical field of timing instruments. The technical scheme of the invention is as follows: the design method of the pointer type regional clock movement comprises the overall design of a movement mechanical transmission system, a driving system and a control system and the specific structural design of each matched component; the mechanical transmission system of the movement is designed as a metal clock movement made of metal materials, the movement is designed as 3 stepping motors, and the mechanical transmission mechanism for the clock movement, which rotates coaxially with a minute/second three-hand, is formed by a method that a gear transmission mechanism is respectively connected with a hour needle tube, a minute needle tube and a second hand tube which are coaxially arranged. Compared with the prior art, the invention has the outstanding substantive characteristics and remarkable progress of large rotation moment, wide application range, no need of accessing various local area networks, independent operation, low energy consumption and low cost operation.
Description
Technical Field
The invention relates to the technical field of timing instrument design and processing thereof, in particular to the technical field of a design method of a pointer type regional clock movement.
Background
Pointer quartz clock products which can be used for indoor automatic time calibration are mainly in 3 major categories:
first category: the regional network time-giving quartz clock mainly receives standard time of a master clock or an NTP server and the like through networking, the network has various forms, most commonly 485 networks, ethernet local area networks or CAN networks and the like, and the biggest disadvantage of the clock is that the clock cannot be suitable for independent application occasions without networks, and communication lines are required to be arranged independently, so that the clock is mainly applied to large-scale occasions such as office buildings, hospitals, railways, squares and the like.
The second category: the GPS time service clock generally uses a longer outdoor GPS antenna to receive time information for timing, and can also use GPS master clock server information in various network receiving networks, and the GPS time service Zhong Shiji is the regional network time service clock of the first kind. The quartz clock has the greatest defects that: the clock itself or the GPS master clock system itself in the network requires the GPS antenna to be installed outdoors, and even in a stand-alone application other than the network, the clock itself must be connected to the outdoor antenna, especially in the finished application, which is very disadvantageous for construction and installation.
Third category: the electric wave clock is characterized in that the clock receives electric wave signals emitted by a wireless long wave time service radio station, the clock can be powered by a battery, but has the biggest defect that only one wireless long wave time service radio station which is controlled abroad in China covers an extremely unhealthy range, even if the radio station can cover an area, the signals in a building are extremely weak, so that the standard time of the electric wave clock can not be received in many times, and the standard time has strict requirements on the address position. Moreover, the electric wave decoding circuit is complex, the decoding is complicated, the standard time is needed to be positioned for a long time, the mechanical and circuit faults are easy to occur, the whole movement must be replaced once the movement has faults, and the cost is high. Another disadvantage is monopoly of the domestic encrypted wave clock circuit at home and abroad, and is not beneficial to the development of the clock industry in China. The power supply of the electric wave clock can only be the power supply of a common battery, the power supply time can only be maintained for about 1 year, the signal of the electric wave clock needs to be replaced every year, the electric wave clock is sometimes influenced by weather or seasons, and the coverage areas of different regions have quite a large number of dead zones without signals.
When the electric wave clock works, if an electric wave signal exists, the time is usually calibrated once in one minute, and the working mode has the advantages that the requirement on quartz Zhong Jingzhen is not high, but a receiving and decoding circuit for the electric wave signal is added in the whole movement, the structure is complex, the decoding efficiency is low, and the maintenance is not facilitated. The electric wave clock has smaller moment and is only suitable for indoor clocks with small disc surfaces.
With the current striding development of intelligent and internet technologies, research on the internet of things and intelligent home becomes a current hot spot, and requirements of people on living necessities are higher and higher. As an important part of home, the clock should be developed towards intelligence, humanization and network home, which is a necessary trend of the current high-speed network information society. Therefore, it is a urgent task for those skilled in the art to design a design method of a domestic or commercial pointer type regional clock movement, which has large moment, can utilize widely used CDMA network with wide signal coverage area to receive satellite standard time, is applied indoors, does not need to set up an outdoor antenna, does not need to access various local area networks, operates independently, has low energy consumption, is maintenance-free, can automatically calibrate time-minute-second pointer time service, has low cost, and provides a smart household and humanized pointer type regional clock which can be close to people's life for the market.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a design method of a novel, low-cost, household or commercial pointer type regional clock movement, which has the advantages of large rotation moment, wide signal coverage range, satellite standard time receiving capability, low energy consumption, maintenance-free capability of automatically calibrating time minute second pointer time service, and no need of installing an outdoor antenna and accessing various local area networks.
In order to solve the technical problems, the invention is realized by the following technical scheme: the design method of the pointer type regional clock movement comprises the overall design of the movement and a control system, and is characterized in that the design of the movement comprises the overall design of a mechanical transmission system, a driving system and a control system of the movement and the specific structural design of each matched part; the mechanical transmission system of the movement is designed as a metal clock movement made of metal materials, the movement structure is designed as 3 stepping motors, and the mechanical transmission mechanism for the clock movement with the concentric rotation of a minute hand and a second hand is formed by a method that a gear transmission mechanism is respectively connected with a time needle tube, a minute hand tube and a second hand tube which are coaxially arranged; the design of the movement is that at least one photoelectric switch is arranged in the movement and used as a second, minute and hour three-pin zeroing photoelectric coupling detection information feedback mechanism; the design of the movement driving system is that a driving circuit chip is arranged to drive the stepping motor to operate in a half-step driving mode.
In order to further solve the technical problems, the preferred scheme of the technical scheme is as follows:
the design method of the movement control system is as follows: the control circuit of the movement control system is composed of a low-power consumption direct-current voltage-stabilizing LDO circuit, a crystal oscillator frequency stabilizing module, a manual key module, a CDMA time service module, a serial port communication interface module, a standby clock module, a driving chip module, a state indicating module, a movement feedback signal adjusting module, a pointer zeroing sensing photoelectric coupling detecting module and an upper computer parameter debugging and correcting module.
The design method of the standby clock module of the movement control system comprises the following steps: the standard time acquisition in the extreme case of no received CDMA signal is: and correcting the standby clock module at the moment of integer seconds after the standard time is obtained by the CDMA time service module each time by using the set standby time circuit PCF8563 chip, and reading and writing the standard time by the standby clock module through the I2C bus.
The design method of the movement control system is as follows: and under the condition that the CDMA signal cannot be received, the AVR singlechip master control module is provided with a manual key module to support manual adjustment of the time minute second pointer, and the time is stored in the standby clock module.
The design method of the AVR singlechip master control module of the control system comprises the following steps: the AVR singlechip master control module is mainly in a sleep mode at ordinary times, wakes up once every 2 milliseconds, checks the current working state after waking up, decides whether a motor needs to be driven according to the working state, checks whether a key is pressed down and then enters sleep, the checking and driving process is very short, the AVR singlechip master control module system sleeps for most of the time, and the whole machine power consumption of the system is used for motor driving of a machine core during sleep.
The design method of the movement zeroing sensing photoelectric coupling detection module in the movement control system is as follows: when the 3 stepping motors are driven to normally run, the pointers return to zero and perform timing processing, the working modes of sleeping and unscheduled awakening are adopted, so that the current consumption of an AVR singlechip master control module, the current consumption of a pointer return to zero sensing photoelectric coupling detection module and the current consumption of a CDMA timing module under the condition of time calibration are reduced; when the power is initially on, the control system drives 3 stepping motors to act in minute and second, so that the pointer return to zero sensing photoelectric coupling detection module detects a passage, and then the stepping motors start to act to find the initial position of the second hand; after finding the initial position, the second hand moves into the motor step by step to find the initial position of the minute hand; when the minute hand finds the initial position, the stepping motor acts to find the initial position of the hour hand; when all the three pointers reach the initial position, the time tracking state is entered, at the moment, the control system drives the 3 stepping motors of time minute and second to run to the position of standard time at the same speed, and the normal time tracking state is entered; in a normal running state, the control system drives the second stepping motor to continuously run to drive the second hand to run, the step-by-step feeding motor runs once every 10 seconds, and the time stepping motor runs once every 120 seconds.
The timing and communication design method of the CDMA timing module in the movement control system comprises the following steps: the IRF7834 is set to be electrified and controlled, when the device works, the IRF7834 MOS tube is conducted, and the CDMA time service module is electrified; then, the hardware of the CDMA time service module is reset by control CDMARST, CDMAPower, the state and the current time of the CDMA signal are obtained by an AT instruction set, the communication is carried out AT a high-speed baud rate of 9600bps, and after the AT instruction is sent, the CDMA time service module gives satellite time information accurate to less than 5 milliseconds.
The design method of the crystal oscillator frequency stabilization module in the movement control system comprises the following steps: the direct-insert 12.5PF passive crystal oscillator is adopted, the frequency error of 32768HZ of an adjustable capacitor outside an AVR singlechip master control module is within 0.001HZ, and then the estimation error caused by the crystal oscillator is subjected to software compensation every 1 hour when the system is in operation.
The design method of the serial communication interface module of the movement control system is as follows: an RS422, a GPS, a B code and the like Zhong Jiekou are arranged, so that the method is suitable for various engineering occasions.
Compared with the prior art, the invention has the following outstanding substantive characteristics and remarkable progress:
the design method of the pointer type regional clock movement is characterized in that a mechanical transmission mechanism of the movement is made of metal materials, the movement is provided with 3 stepping motors, the 3 stepping motors are respectively connected with a time needle tube, a minute needle tube and a second needle tube which are coaxially arranged through the gear transmission mechanism, and the technical scheme of the mechanical transmission mechanism is formed by coaxially arranging three hands of the clock movement in a time-second mode. The design hardware circuit is practical and simple, the cost is low, the whole structure is simple, the movement motor is driven to run by the flexible movement external driving circuit chip, and the maintenance, the upgrading and the debugging are convenient, so that the design method of the pointer type regional clock movement has outstanding substantive characteristics and obvious progress compared with the prior art.
The design method of the pointer type regional clock movement is that a driving circuit chip is arranged to drive the stepping motor to operate in a half-step driving mode, so that the movement operates more stably and the noise vibration is lower; the technical scheme of ensuring accurate pointer indication time by adopting software compensation and hardware capacitance fine adjustment ensures that the time precision of the pointer type regional clock movement which is operated for 24 hours is less than 100 milliseconds under the condition of not using CDMA timing, thereby providing a clock movement with more accurate time precision for household and business.
The invention adopts AVR single chip microcomputer main control module as core, uses 12V DC power supply to supply power, designs the voltage stabilizing circuit of CDMA and single chip microcomputer public power supply, and sets the control circuit of the machine core control system composed of low power consumption DC voltage stabilizing LDO circuit, crystal vibration frequency stabilizing module, manual key module, CDMA time service module, serial port communication interface module, standby clock module, driving chip module, state indication module, machine core feedback signal adjusting module, pointer return-to-zero sensing photoelectric coupling detecting module, upper computer parameter debugging and correcting module. Because the CDMA module has larger power consumption and the control mechanism has accurate time running, the clock movement does not need to be calibrated at any moment, so the clock movement is calibrated at any time, the whole system uses cheaper common crystal oscillator for reducing the cost, and the design method of the pointer type regional clock movement has the outstanding substantial characteristics of novel design conception, reliable technical measures, reduced product cost and reliable use quality compared with the prior art.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. Like reference numerals refer to like parts throughout the drawings.
In the drawings:
fig. 1 is a structural design block diagram of a control system of a design method of a pointer type regional clock movement of the present invention.
Fig. 2 is a schematic diagram of a movement structure of a design method of a pointer type regional clock movement according to the present invention.
Fig. 3 is a top view of fig. 2.
Fig. 4 is a schematic diagram of a CDMA interface circuit structure according to a design method of a pointer type regional clock movement of the present invention.
Fig. 5 is a schematic diagram of a CDMA interface circuit structure according to a design method of a pointer type regional clock movement of the present invention.
Fig. 6 is a schematic diagram of a spare time circuit design of a design method of a pointer type regional clock movement according to the present invention.
The reference numerals are: the system comprises a 1-AVR singlechip master control module 2-standby clock module 3-driving chip module 4-core 4.1 stepper motor 4.1.1-second stepper motor 4.1.2-step motor 4.1.3-time stepper motor 4.2-second motor wheel 4.3-minute motor wheel 4.4-time motor wheel 4.5-motor shaft 4.6-time needle tube 4.7-minute needle tube 4.8-second needle tube 4.9-clamping plate 4.10-clamping plate 4.11-photoelectric switch 4.12-hour wheel 4.13-minute wheel 4.14-second wheel 5-pointer return-to-zero sensing photoelectric coupling detection module 6-core feedback signal adjustment module 7-state indication module 8-upper computer parameter debugging and correction module 9-CDMA time service module 10-manual key module 11-crystal oscillator frequency stabilization circuit module 12-serial port communication interface module.
Detailed Description
The following detailed description of the design method and specific structural details of the pointer type regional clock movement and the installation and use process of the present invention is not to be construed as limiting the claims in any sense.
Example 1:
the invention relates to a design method of a pointer type regional clock movement in an embodiment 1, which is a new design by taking a pointer type regional clock movement used in an intelligent master-slave clock system which is used for meeting public places such as ships, hotel stations, wharfs and the like and uniformly controlling the regional scope as a carrier. The design method of the pointer type regional clock movement (see fig. 2 and 3) comprises the overall design of a movement 4 and a control system, wherein the design of the movement 4 comprises the overall design of a mechanical transmission system, a driving system and a control system of the movement and the specific structural design of each matched component; the mechanical transmission system of the movement 4 is designed as a metal clock movement made of metal materials, the movement structure is designed as 3 stepping motors 4.1, and the mechanical transmission mechanism for coaxially rotating the hour minute second three hands of the clock movement is formed by a method that a gear transmission mechanism is respectively connected with a coaxially arranged hour needle tube 4.6, a minute hand tube 4.7 and a second hand tube 4.8; the design of the movement driving system is that a driving circuit chip is arranged to drive the stepping motor to operate in a half-step driving mode. The 3 stepper motors 4.1 of the movement 4 are respectively: a second stepping motor 4.1.1, a step-by-step feeding motor 4.1.2 and a time stepping motor 4.1.3; the second stepping motor 4.1.1 is connected with a second wheel 4.14 arranged on a second wheel tube 4.8 through a second motor wheel 4.2 on a motor shaft 4.5; the step-by-step motor 4.1..2 is connected with a minute wheel 4.13 arranged on a minute wheel pipe 4.7 through a minute motor wheel 3 on a motor shaft; the time stepping motor 4.1.3 is connected with a time wheel 4.12 arranged on a time wheel tube 4.6 through a time motor wheel 4.4 on a motor shaft; the movement 4 is provided with a photoelectric switch 4.11 as a second, minute and hour three-pin return-to-zero feedback coupling detection optocoupler, and the whole movement 4 is formed by taking clamping plates 4.9 and 4.10 as carriers.
In order to further solve the technical problems, the design method of the movement control system (see fig. 1) adopts an AVR singlechip master control module 1 as a core, uses a 12V direct current power supply to supply power, designs a voltage stabilizing circuit of public power supplies of a CDMA and a singlechip, and is a control circuit of the movement control system consisting of a low-power consumption direct current voltage stabilizing LDO module, a crystal oscillator frequency stabilizing module 11, a manual key module 10, a CDMA time service module 9, a serial port communication interface module 12, a standby clock module 2, a driving chip module 3, a state indicating module 7, a movement feedback signal adjusting module 6, a pointer return-to-zero sensing photoelectric coupling detection module 5 and an upper computer parameter debugging and correcting module 8.
The design method of the above-mentioned core control system standby clock module 2 (see fig. 6) is that the standard time is obtained when the CDMA signal is not received, and the method is as follows: and correcting the standby clock module 2 at the moment of integer seconds after the standard time is obtained by the CDMA time service module 9 each time by using the set standby time circuit PCF8563 chip, and reading and writing the standard time by the standby clock module 2 through an I2C bus.
The above-mentioned movement control system is designed in such a way that the voltage stabilizing circuit module is further provided with a manual key module 10 to support manual adjustment of the time-second hands and save the time to the standby clock module 2 when the CDMA signal is not received.
The design method of the AVR singlechip master control module 1 of the control system is as follows: the AVR singlechip master control module 1 is mainly in a sleep mode at ordinary times, wakes up once every 2 milliseconds, checks the current working state after waking up, decides whether a motor needs to be driven according to the working state, checks whether a key is pressed down and then enters sleep at the same time, the checking and driving process is very short, the system of the AVR singlechip master control module 1 is mainly in sleep, and the whole power consumption of the system is used for driving the motor of the movement during sleep.
The design method of the movement zeroing sensing photoelectric coupling detection module 5 in the movement control system (see fig. 2 and 3) is that when 3 stepping motors 4.1 are driven to run normally, the pointers are zeroed and time correction is carried out, various working modes such as sleep and unscheduled awakening are adopted, so that the self working consumption of the AVR singlechip master control module 1, the current consumption of the zeroed pointers sensing photoelectric coupling detection module 5 and the current consumption of the CDMA time service module 9 under the condition of time correction are reduced; when the power is initially on, the control system drives 3 stepping motors 4.11 to act in minute and second, so that the pointer return to zero sensing photoelectric coupling detection module 5 detects a passage, and then the stepping motors 4.1.1 start to act to find the initial position of a second hand; after the second hand finds the initial position, the motor 4.1.2 is stepped to act, and the initial position of the minute hand is found; when the minute hand finds the initial position, the stepping motor 4.1.3 acts to find the initial position of the hour hand; when all the three pointers reach the initial position, the time tracking state is entered, at the moment, the control system drives the 3 stepping motors 4.1 in time minute and second to run to the position of the standard time at the same speed, and the normal time tracking state is entered; in the normal running state, the control system drives the second stepping motor 4.1.1 to continuously run to drive the second hand to run, the step-by-step motor 4.1.2 runs once every 10 seconds, and the time stepping motor 4.1.3 runs once every 120 seconds.
The timing and communication design method of the CDMA time service module 9 in the movement control system (see fig. 4 and 5) is to set IRF7834 to power up, and when in operation, the IRF7834 MOS tube is turned on, and the CDMA time service module 9 is powered up. Then, the hardware of the CDMA timing module 9 is reset by the control CDMARST, CDMAPower, the state and the current time of the CDMA signal are obtained by using the AT instruction set, the CDMA timing module 9 gives satellite time information accurate to less than 5 milliseconds after sending the AT instruction by high-speed baud rate communication of 9600 bps.
The crystal oscillator frequency stabilization module 11 in the movement control system is designed by adopting a direct-insert 12.5PF passive crystal oscillator, the frequency error of an adjustable capacitor 32768HZ outside the AVR singlechip master control module 1 is within 0.001HZ, and then the estimated error caused by the crystal oscillator is subjected to software compensation every 1 hour when the system is in operation.
The design method of the serial communication interface module 12 of the movement control system is as follows: an RS422, a GPS, a B code and the like Zhong Jiekou are arranged, so that the method is suitable for various engineering occasions.
The above is a static structure of the design method of the pointer type regional clock movement according to embodiment 1 of the present invention.
Example 2:
the design method of the pointer type regional clock movement (see fig. 1) of the embodiment 2 of the invention is a new design carried out by taking an intelligent pointer type regional clock movement suitable for community home use as a carrier, and the design method of the pointer type regional clock movement (see fig. 2) is as follows: the mechanical transmission mechanism comprises a movement 4 and a control system, wherein the design of the movement 4 comprises the overall design of a mechanical transmission system, a driving system and the control system of the movement and the specific structural design of each matched component; the mechanical transmission system of the movement 4 is designed as a metal clock movement made of metal materials, the movement structure is designed as 3 stepping motors 4.1, and the mechanical transmission mechanism for coaxially rotating the hour minute second three hands of the clock movement is formed by a method that a gear transmission mechanism is respectively connected with a coaxially arranged hour needle tube 4.6, a minute hand tube 4.7 and a second hand tube 4.8; the design of the movement driving system is that a driving circuit chip is arranged to drive the stepping motor to operate in a half-step driving mode. The 3 stepper motors 4.1 of the movement 4 are respectively: a second stepping motor 4.1.1, a step-by-step feeding motor 4.1.2 and a time stepping motor 4.1.3; the second stepping motor 4.1.1 is connected with a second wheel 4.14 arranged on a second wheel tube 4.8 through a second motor wheel 4.2 on a motor shaft 4.5; the step-by-step motor 4.1..2 is connected with a minute wheel 4.13 arranged on a minute wheel pipe 4.7 through a minute motor wheel 3 on a motor shaft; the time stepping motor 4.1.3 is connected with a time wheel 4.12 arranged on a time wheel tube 4.6 through a time motor wheel 4.4 on a motor shaft; the movement 4 is provided with a photoelectric switch 4.11 which is used as a second, minute and hour three-pin return-to-zero feedback coupling detection optocoupler, and the whole movement 4 is formed by taking clamping plates 4.9 and 4.10 as supporting bodies.
In order to further solve the technical problems, the design method of the movement control system (see fig. 1) adopts an AVR singlechip master control module 1 as a core, uses a 12V direct current power supply to supply power, designs a voltage stabilizing circuit of public power supplies of a CDMA and a singlechip, and is a control circuit of the movement control system consisting of a low-power consumption direct current voltage stabilizing LDO module, a crystal oscillator frequency stabilizing module 11, a manual key module 10, a CDMA time service module 9, a serial port communication interface module 12, a standby clock module 2, a driving chip module 3, a state indicating module 7, a movement feedback signal adjusting module 6, a pointer return-to-zero sensing photoelectric coupling detection module 5 and an upper computer parameter debugging and correcting module 8.
The design method of the above-mentioned core control system standby clock module 2 (see fig. 6) is that the standard time is obtained when the CDMA signal is not received, and the method is as follows: and correcting the standby clock module 2 at the moment of integer seconds after the standard time is obtained by the CDMA time service module 9 each time by using the set standby time circuit PCF8563 chip, and reading and writing the standard time by the standby clock module 2 through an I2C bus.
The above-mentioned movement control system is designed in such a way that the voltage stabilizing circuit module is further provided with a manual key module 10 to support manual adjustment of the time-second hands and save the time to the standby clock module 2 when the CDMA signal is not received.
The design method of the AVR singlechip master control module 1 of the control system is as follows: the AVR singlechip master control module 1 is mainly in a sleep mode at ordinary times, wakes up once every 2 milliseconds, checks the current working state after waking up, decides whether a motor needs to be driven according to the working state, checks whether a key is pressed down and then enters sleep at the same time, the checking and driving process is very short, the system of the AVR singlechip master control module 1 is mainly in sleep, and the whole power consumption of the system is used for driving the motor of the movement during sleep.
The design method of the movement zeroing sensing photoelectric coupling detection module 5 in the movement control system (see fig. 2 and 3) is that when 3 stepping motors 4.1 are driven to run normally, the pointers are zeroed and time correction is carried out, various working modes such as sleep and unscheduled awakening are adopted, so that the self working consumption of the AVR singlechip master control module 1, the current consumption of the zeroed pointers sensing photoelectric coupling detection module 5 and the current consumption of the CDMA time service module 9 under the condition of time correction are reduced; when the power is initially on, the control system drives 3 stepping motors 4.11 to act in minute and second, so that the pointer return to zero sensing photoelectric coupling detection module 5 detects a passage, and then the stepping motors 4.1.1 start to act to find the initial position of a second hand; after the second hand finds the initial position, the motor 4.1.2 is stepped to act, and the initial position of the minute hand is found; when the minute hand finds the initial position, the stepping motor 4.1.3 acts to find the initial position of the hour hand; when all the three pointers reach the initial position, the time tracking state is entered, at the moment, the control system drives the 3 stepping motors 4.1 in time minute and second to run to the position of the standard time at the same speed, and the normal time tracking state is entered; in the normal running state, the control system drives the second stepping motor 4.1.1 to continuously run to drive the second hand to run, the step-by-step motor 4.1.2 runs once every 10 seconds, and the time stepping motor 4.1.3 runs once every 120 seconds.
The timing and communication design method of the CDMA time service module 9 in the movement control system (see fig. 4 and 5) is to set IRF7834 to power up, and when in operation, the IRF7834 MOS tube is turned on, and the CDMA time service module 9 is powered up. Then, the hardware of the CDMA timing module 9 is reset by the control CDMARST, CDMAPower, the state and the current time of the CDMA signal are obtained by using the AT instruction set, the CDMA timing module 9 gives satellite time information accurate to less than 5 milliseconds after sending the AT instruction by high-speed baud rate communication of 9600 bps.
The crystal oscillator frequency stabilization module 11 in the movement control system is designed by adopting a direct-insert 12.5PF passive crystal oscillator, the frequency error of an adjustable capacitor 32768HZ outside the AVR singlechip master control module 1 is within 0.001HZ, and then the estimated error caused by the crystal oscillator is subjected to software compensation every 1 hour when the system is in operation.
The design method of the serial communication interface module 12 of the movement control system is as follows: an RS422, a GPS, a B code and the like Zhong Jiekou are arranged, so that the method is suitable for various engineering occasions.
The above is a static structure of the design method of the pointer type regional clock movement according to embodiment 2 of the present invention.
Claims (4)
1. The design method of the pointer type regional clock movement comprises the overall design of the movement and a control system, and is characterized in that the design of the movement comprises the overall design of a mechanical transmission system, a driving system and a control system of the movement and the specific structural design of each matched component; the mechanical transmission system of the movement is designed as a metal clock movement made of metal materials, the movement structure is designed as 3 stepping motors, and the mechanical transmission mechanism for the clock movement with the concentric rotation of a minute hand and a second hand is formed by a method that a gear transmission mechanism is respectively connected with a time needle tube, a minute hand tube and a second hand tube which are coaxially arranged; the design of the movement is that at least one photoelectric switch is arranged in the movement and used as a second, minute and hour three-pin zeroing photoelectric coupling detection information feedback mechanism; the design of the movement driving system is that a driving circuit chip is arranged to drive the operation of a stepping motor in a half-step driving mode, and the design method of the movement control system is as follows: the control circuit of the movement control system is designed by adopting an AVR singlechip master control module as a core and utilizing a 12V direct current power supply to supply power, designing a voltage stabilizing circuit of a CDMA and singlechip public power supply, and setting a low-power consumption direct current voltage stabilizing LDO circuit, a crystal oscillator frequency stabilizing module, a manual key module, a CDMA time service module, a serial port communication interface module, a standby clock module, a driving chip module, a state indicating module, a movement feedback signal adjusting module, a pointer zeroing sensing photoelectric coupling detecting module and an upper computer parameter debugging and correcting module, wherein the design method of the movement control system comprises the following steps: the standard time acquisition in the extreme case of no received CDMA signal is: correcting the standby clock module at the moment of integer seconds after the standard time is obtained by the CDMA time service module each time by using a set standby time circuit PCF8563 chip, and reading and writing the standard time by the standby clock module through an I2C bus; the design method of the movement control system is as follows: under the condition that the CDMA signal can not be received, the AVR singlechip master control module is provided with a manual key module for supporting manual adjustment of a time minute second pointer and saving time into a standby clock module, and the design method of the AVR singlechip master control module of the control system is as follows: the AVR singlechip master control module is mainly in a sleep mode at ordinary times, wakes up once every 2 milliseconds, checks the current working state after waking up, decides whether a motor needs to be driven according to the working state, checks whether a key is pressed down and then enters sleep, the checking and driving process is very short, the AVR singlechip master control module system sleeps for most of the time, the whole power consumption of the system is used for driving the motor of the movement during sleep, and the design method of the movement zeroing sensing photoelectric coupling detection module in the movement control system is as follows: when the 3 stepping motors are driven to normally run, the pointers return to zero and perform timing processing, the working modes of sleeping and unscheduled awakening are adopted, so that the current consumption of an AVR singlechip master control module, the current consumption of a pointer return to zero sensing photoelectric coupling detection module and the current consumption of a CDMA timing module under the condition of time calibration are reduced; when the power is initially on, the control system drives 3 stepping motors to act in minute and second, so that the pointer return to zero sensing photoelectric coupling detection module detects a passage, and then the stepping motors start to act to find the initial position of the second hand; after finding the initial position, the second hand moves into the motor step by step to find the initial position of the minute hand; when the minute hand finds the initial position, the stepping motor acts to find the initial position of the hour hand; when all the three pointers reach the initial position, the time tracking state is entered, at the moment, the control system drives the 3 stepping motors of time minute and second to run to the position of standard time at the same speed, and the normal time tracking state is entered; in a normal running state, the control system drives the second stepping motor to continuously run to drive the second hand to run, the step-by-step feeding motor runs once every 10 seconds, and the time stepping motor runs once every 120 seconds.
2. The method for designing a pointer type regional clock movement according to claim 1, wherein the method for designing timing and communication of the CDMA timing module in the movement control system is as follows: the IRF7834 is set to be electrified and controlled, when the device works, the IRF7834 MOS tube is conducted, and the CDMA time service module is electrified; then, the hardware of the CDMA time service module is reset by control CDMARST, CDMAPower, the state and the current time of the CDMA signal are obtained by an AT instruction set, the communication is carried out AT a high-speed baud rate of 9600bps, and after the AT instruction is sent, the CDMA time service module gives satellite time information accurate to less than 5 milliseconds.
3. The method for designing a pointer type regional clock movement according to claim 1, wherein the method for designing a crystal oscillator frequency stabilization module in the movement control system is as follows: the direct-insert 12.5PF passive crystal oscillator is adopted, the frequency error of 32768HZ of an adjustable capacitor outside an AVR singlechip master control module is within 0.001HZ, and then the estimation error caused by the crystal oscillator is subjected to software compensation every 1 hour when the system is in operation.
4. The method for designing a pointer type regional clock movement according to claim 1, wherein the method for designing a serial communication interface module of the movement control system is as follows: an RS422, a GPS, a B code and the like Zhong Jiekou are arranged, so that the method is suitable for various engineering occasions.
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