CN203250148U

CN203250148U - Transponder for transmitting navigation satellite time service information into low frequency time-code time service signal

Info

Publication number: CN203250148U
Application number: CN 201320117976
Authority: CN
Inventors: 吴承超
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-03-14
Filing date: 2013-03-14
Publication date: 2013-10-23
Anticipated expiration: 2023-03-14

Abstract

A transponder for transmitting the navigation satellite time service information into a low frequency time-code time service signal is a device for providing a time service signal to a electric wave time service timekeeper, and comprises a low frequency time-code generating circuit, a carrier wave signal generating circuit, a modulator circuit, a power amplification circuit, a power supply, an outputting and sending unit and the like, and is characterized in that the transponder for transmitting the navigation satellite time service information into the low frequency time-code time service signal comprises an RS485 interface device, can receive a serial signal transmitted by a navigation satellite time service information transponder, according with an RS485 protocol, and containing the satellite time service information, can obtain a 1 pulse per second (PPS) embedded in the signal and the accurate time, and enables the sent low frequency time-code time service signal to have a very high time service precision. According to the transponder of the utility model, the electric wave time service timekeepers also can be used in the places or occasions that can not receive the electric wave time service signals originally or stably. The outputting and sending unit of the transponder is formed by connecting a plurality of basic sending units in parallel, and one transponder can supply a signal source to many electric wave time service timekeepers.

Description

The Navsat time service information turns low-frequency time-code time signal transponder

Technical field

The utility model relates to a kind of Navsat time service information is transmitted and is the device of low-frequency time-code time signal, specifically, relate to the Navsat time service information that a kind of reception transmitted by " Navsat time service information transponder " and transmit and be the device of low-frequency time-code time signal, belong to the Service of Timing field.

Background technology

Over nearly twenties years, receive the clock and watch of low-frequency time-code time signal, usually said radio controlled timepiece namely because punctual timing, can every day automatic calibration, without cumulative errors, thereby be widely adopted in countries in the world gradually.In recent years, radio controlled timepiece also began universal coming in China.The low-frequency time-code time signal as carrier wave, is commonly called electric wave time signals with long wave.Several high-power time service broadcast platforms belong to different countries in the world, and they respectively adopt specific carrier frequency, and each own special low-frequency time-code, such as the WWVB code of the U.S., the MSF code of Britain, the DCF77 code of Germany, the JJY code of Japan etc., and China adopts the BPC code.Chinese patent application case 200410025933.2 has provided the coded format of BPC code; The coded format of the low-frequency time-code of aforementioned other various countries all can be found in each related web page of " wikipedia " en.wikipedia.org.The common feature of the coded format of various low-frequency time-codes is only to send a low-frequency pulse in one second (except some specific second, as per minute last second of the DCF77 code of Germany without pulse per second (PPS), the BPC code of China is that the 00th, 20,40 second of per minute is without pulse per second (PPS)).The carrier frequency of aforementioned various low-frequency time-codes is respectively: the carrier frequency 60kHz of WWVB code, the carrier frequency 60kHz of MSF code, DCF77 code carrier frequency 77.5kHz, JJY code carrier frequency 40 or 60kHz, BPC code carrier frequency 68.5kHz.

The BPC low-frequency time-code broadcast platform of China is built in Shangqiu, Henan, and the time service electric wave signal of launching can effectively cover the most areas of China.But, apart from Shangqiu, Henan transmitting station apart from area too far away, although perhaps be not too far away apart from Shangqiu but (there is a serious electromagnetic interference source in place that reception environment is bad as neighbouring, being subjected on every side, high-lager building blocks, buildings of living in itself is to the shielding action of electric wave, etc.), radio controlled timepiece just possibly can't reliablely and stablely receive electric wave time signals.Also have some particular surroundingss, in market place builet below the ground, subway station, civil air defense constructions and installations, etc., radio controlled timepiece does not probably receive electric wave time signals at all.

For addressing the above problem, people have proposed some solutions.Such as, patent application case 200520078712.1, the method that adopts is to receive certain position relatively preferably at electric wave signal, through processing, from the serial signal of RS-232 serial line interface output time data, via line is sent to relevant timing device.These methods just allow reception condition slightly be improved, and do not satisfactorily resolve the above-mentioned problem that can't receive or be difficult to receive electric wave time signals, thereby the domestic condition that also has a lot of places or place still not to possess so far the use radio controlled timepiece.

Summary of the invention

In order to allow place not good away from the area of Shangqiu, Henan transmitting station and reception environment or that do not receive the low-frequency time-code time signal also can use radio controlled timepiece at all, the utility model provides a kind of low-frequency time-code time signal transponder, it receives the Navsat time service information of being transmitted by " Navsat time service information transponder ", and forwarding is a kind of low-frequency time-code time signal of appointment.

The technical scheme that this technical matters that solves the utility model adopts is: as shown in Figure 1, be provided with the parts such as RS-485 series interface part (1), low-frequency time-code generation circuit (2), carrier signal generation circuit (3), modulation circuit (4), power amplification circuit (5), power supply (6), output transmitting element (7) in this transponder.Wherein, the core devices that low-frequency time-code produces circuit (2) is single-chip microcomputer or microcontroller, it is by the satellite time transfer information of RS-485 series interface part (1) reception from " Navsat time service information transponder ", obtaining correct time, and produce a kind of lf time-code signal (TC) among the aforesaid various countries low-frequency time-code; Carrier signal produces the carrier signal (CW) that circuit (3) produces the characteristic frequency of this low-frequency time-code time signal; Modulation circuit (4) is modulated at the lf time-code signal (TC) that aforementioned circuit produces on the carrier signal (CW) in amplitude-modulated mode, acquisition is loaded with the modulated signal (MW) of low-frequency time-code, allow again this modulated signal pass through the power amplification of power amplification circuit (5), the modulated signal (PMW) through amplifying that obtains at last is transported to output transmitting element (7), sends to the radio controlled timepiece of closely locating.But so low-frequency time-code time signal that radio controlled timepiece on every side meets the demands with regard to picked up signal intensity.Power supply (6) provides power supply for the various piece of this transponder.

The reason of RS-485 series interface part (1) is adopted in the below's narration: this transponder is to obtain correct time from the Navsat time service information, and the ultra-high frequency signal General Requirements receiving equipment that receives Navsat is positioned over the position that can look at sky straight, but this transponder all is to be installed in the buildings in most use occasions, so this transponder is to receive the Navsat time service information of transmitting from " Navsat time service information transponder " to obtain correct time." Navsat time service information transponder " is suitable for teletransmission for the time service information of transmitting and can be utilized by a plurality of timing devices, normally by the RS-485 serial line interface, send the time service information of serial with the form of balanced differential, the satellite time transfer information of transmitting such as patent application case 201210377342.6 and 200520083956.9 these class transponders just all is to adopt the RS-485 serial line interface to send.This transponder uses RS-485 interface device (1) that the serial signal of the balanced differential form that meets the RS-485 protocol specification is converted to Transistor-Transistor Logic level that single-chip microcomputer or microcontroller can receive or the serial signal of CMOS level, supply low-frequency time-code generation circuit (2).The serial signal that contains time service information that single-chip microcomputer in the low-frequency time-code generation circuit (2) or microcontroller receive aforesaid Transistor-Transistor Logic level or CMOS level, with the acquisition correct time, and this is to produce the accurately precondition of lf time-code signal.

The satellite time transfer information that patent application case 201210377342.6 described " Navsat time service information transponder " is transmitted is to embed the 1PPS pulse per second (PPS) in the serial signal and the free time section that is arranged in p.s. is combined into one road signal and transmits.When this transponder receives this combination serial signal that is embedded with the 1PPS pulse per second (PPS), because producing in the circuit (2), the low-frequency time-code of this transponder contains single-chip microcomputer or microcontroller, Sheffer stroke gate or with door, in the duration that described single-chip microcomputer or microcontroller sent rect.p. and guarantee each rect.p. in the appropriate moment of p.s. can be included in the 1PPS pulse per second (PPS) of p.s. constantly, this rect.p. string (shown in Fig. 2 it (a)) and the above-mentioned combination serial signal (shown in Fig. 2 it (b)) that is embedded with the 1PPS pulse per second (PPS) through Sheffer stroke gate or with door " with " result of logic, obtain the 1PPS pulse per second (PPS) (shown in Fig. 2 it (c), the rising edge of each pulse is corresponding to the 1PPS pulse per second (PPS), if then also anti-phase through Sheffer stroke gate), interrupt request singal as single-chip microcomputer or microcontroller, thereby obtain the per second kind accurate time point of the zero hour, guaranteed the high time service precision of the low-frequency time-code time signal transmitted.

The output transmitting element (7) of this transponder is comprised of several basic transmitting elements, each basic transmitting element is comprised of telefault, electric capacity, resistance, as shown in the dotted line frame of Fig. 8, described telefault and Capacitance parallel connection resonance are in the carrier frequency of the low-frequency time-code time signal that sends, and resistance is as the isolation resistance between each basic transmitting element.Each basic transmitting element is connected in parallel, and is combined into the whole output transmitting element of this transponder.Telefault in the described basic transmitting element is to consist of on bar magnet with enameled wire.Each basic transmitting element be installed on the clock and watch that need to receive electric wave time signals near, the some basic transmitting element that is connected in parallel can provide the electric wave time signals source for a lot of radio controlled timepieces.

The beneficial effects of the utility model are: because this transponder is that the Navsat time service information is transmitted the low-frequency time-code time signal that can receive for common radio controlled timepiece, and closely send to radio controlled timepiece, can both not use radio controlled timepiece so that originally receive place or the place that maybe can not stablize the reception electric wave time signals, and make radio controlled timepiece obtain in a wider context to use; Simultaneously, the temporal information that this transponder obtains is to come from Navsat, and its time precision reaches Microsecond grade, has guaranteed that low-frequency time-code time signal that this transponder sends has the time service precision of inferior millisecond magnitude; Moreover, this transponder is to receive to come from the satellite time transfer information that " Navsat time service information transponder " transmitted, can wide apart between two kinds of transponders, so that this transponder can be positioned over any place in the buildings, expanded application scenario and the scope of this transponder; And the serial signal that is embedded with the 1PPS pulse per second (PPS) transmitted of this transponder " the Navsat time service information transponder " that can reception ﹠ disposal be proposed by patent application case 201210377342.6, only need a pair of signal wire, simplified the signal transmission line road; One of this transponder just can provide electric wave time signals for a lot of radio controlled timepieces.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is block scheme of the present utility model.

Fig. 2 is the waveform correlation figure (mode chart) that chooses the 1PPS pulse per second (PPS) with the rect.p. string from the combination serial signal.

Fig. 3～Fig. 8 is the electrical schematic diagram of an embodiment of the present utility model.

Wherein, Fig. 3 is the electrical schematic diagram that RS-485 series interface part (1) and low-frequency time-code produce the embodiment of circuit (2);

Fig. 4 is the electrical schematic diagram that carrier signal produces the embodiment of circuit (3);

Fig. 5 is the electrical schematic diagram of the embodiment of modulation circuit (4);

Fig. 6 is the electrical schematic diagram of the embodiment of power amplification circuit (5);

Fig. 7 is the electrical schematic diagram of the embodiment of power supply (6);

Fig. 8 is the electrical schematic diagram of the embodiment of output transmitting element (7).

Embodiment

In Fig. 1, satellite time transfer information from " Navsat time service information transponder ", owing to be the serial signal that belongs to the RS-485 protocol specification, pass through first RS-485 series interface part (1), this signal is converted to the serial signal of Transistor-Transistor Logic level or CMOS level.Low-frequency time-code produces circuit (2) and is made of single-chip microcomputer or microcontroller, Sheffer stroke gate (perhaps with door) and other auxiliary circuits.Described single-chip microcomputer or microcontroller receive switched serial signal, obtain the information such as date, time.In order to obtain correct time, also must access the 1PPS pps pulse per second signal and cause interruption with its.For as patent application case 200520083956.9, the 1PPS pulse per second (PPS) is transmitted separately, can be directly as interrupt request singal after then changing through another RS-485 series interface part.And for as patent application case 201210377342.6 with the 1PPS pulse per second (PPS) with transmit the date, the serial signal of time has been combined into one road signal, after through RS-485 series interface part (1) conversion, also to manage to take out the 1PPS pps pulse per second signal that is embedded in this signal, concrete grammar is such: by 1 pin (being the 12nd pin of microcontroller U1 in the embodiments of figure 3) of single-chip microcomputer or microcontroller in the appropriate moment of per second (certain between such as 0.80～0.95 second constantly), begin to send a rect.p. (duration is the appropriate value between 400～100 milliseconds), this rect.p. string (shown in Fig. 2 it (a)) and aforementioned combination serial signal (shown in Fig. 2 it (b)) by Sheffer stroke gate (in the embodiments of figure 3 right and wrong door U2C) or with door, obtain the 1PPS pulse per second (PPS) (shown in Fig. 2 it (c), the rising edge of each pulse is corresponding to the 1PPS pulse per second (PPS), if then also anti-phase through Sheffer stroke gate), and deliver to single-chip microcomputer or microcontroller as interrupt request singal.Single-chip microcomputer or microcontroller obtain date, temporal information from the serial signal that receives, and obtain the correct time point that per second begins by the interruption that the 1PPS pulse per second (PPS) causes, and the coded format according to a certain low-frequency time-code of appointment produces low-frequency time-code.The low-frequency time-code that this part circuit produces according to the requirement of use occasion, can be the BPC code of China, also can be the low-frequency time-code of other countries, such as the DCF77 code of Germany etc.The lf time-code signal that produces (TC) is sent to modulation circuit (4).

The carrier signal (CW) of the characteristic frequency of this low-frequency time-code time signal of carrier signal generation circuit (3) generation appointment, this carrier frequency is fixed, the crystal oscillating circuit that available CMOS integrated circuit consists of produces vibration, and the frequency-selecting by lc circuit, obtain the sine wave of this frequency.This carrier signal (CW) is sent to modulation circuit (4).Modulation circuit (4) is modulated at lf time-code signal (TC) on the carrier signal (CW) in amplitude-modulated mode, this part circuit available dedicated integrated circuit, also available triode consists of simple modulation circuit, is exactly an embodiment who consists of modulation circuit with triode as shown in Figure 5.At last, be loaded with the modulated signal (MW) of low-frequency time-code through the power amplification of power amplification circuit (5), obtain the modulated signal (PMW) through amplifying.Power amplification circuit herein can be made of triode, and also the audio available power amplifier integrate circuit is exactly an embodiment who carries out power amplification with the audio frequency power amplifier integrated circuit as shown in Figure 6.Modulated signal (PMW) through power amplification is transported to output transmitting element (7).Output transmitting element (7) is comprised of several basic transmitting elements.Each basic transmitting element includes telefault, electric capacity, resistance, and telefault wherein and Capacitance parallel connection resonance are in the carrier frequency of the low-frequency time-code time signal that sends.Be connected in parallel between each basic transmitting element, be combined into the output transmitting element of this transponder.Telefault in the described basic transmitting element is to consist of on bar magnet with enameled wire.Each basic transmitting element be installed in the clock and watch that need to receive electric wave time signals near, mainly send time signal by way of electromagnetic induction to radio controlled timepiece.Power supply (6) uses integrated stable voltage circuit for the each several part circuit of this transponder provides power supply among the embodiment as shown in Figure 7.

Fig. 3～Fig. 8 is the electrical schematic diagram of an embodiment of the present utility model.Obviously, because selected single-chip microcomputer or the difference of microcontroller, and the various combination of other components and parts, the physical circuit that can realize the function of Fig. 1 block scheme is too numerous to enumerate, only is the example of one of them physical circuit herein.

Contrast Fig. 1, Fig. 3 are the embodiment electrical schematic diagrams that RS-485 series interface part (1) and low-frequency time-code produce circuit (2).Among the figure, U3 (MAX485) is the RS-485 series interface part, and the satellite time transfer information from " Navsat time service information transponder " accesses from connector XP1, input to U3 through resistance R 4, R5, from the output of the 1st pin of U3 then is the serial signal of having changed; Resistance R 4, R5 and bilateral diode VD1, VD2 consist of the input protection circuit of U3 jointly.Part except above-mentioned components and parts is that low-frequency time-code produces circuit.Wherein, U1 (MC9S08SH8) is microcontroller; Crystal oscillator element BX1 and capacitor C 1, C2, resistance R 1 consist of the oscillatory circuit of U1; Be connected to the 16th pin (RXD) of U1 from the serial signal through conversion of the 1st pin of U3 output; Send rect.p. from the 12nd pin of U1, input end (the 9th pin) to Sheffer stroke gate U2C (74HC00 1/4), and be connected to another input end (the 10th pin) of Sheffer stroke gate U2C from the serial signal of the 1st pin of U3 output, AND logic circuit through Sheffer stroke gate, obtain the 1PPS pulse per second (PPS), after anti-phase, deliver to the 20th pin of U1, as interrupt request singal.Under the control of the program in U1, from the serial signal that receives, obtain date, temporal information, and owing to interrupt, confirm the time point that per second begins, under programmed control, produced a kind of lf time-code signal of appointment, and from the 11st pin output, deliver to modulation circuit (4) through the isolation of Sheffer stroke gate U2D (74HC00 1/4) and the lf time-code signal (TC) of driving.The 9th pin of U1, the 10th pin respectively have level output, respectively through the driving of Sheffer stroke gate U2A (74HC00 1/4), Sheffer stroke gate U2B (74HC00 1/4), make LED 1, LED2 luminous, be used to refer to the time-code output situation whether satellite time transfer information normally reaches this transponder, resistance R 2, R3 are respectively the current-limiting resistances of LED1, LED2.

Fig. 4 is the electrical schematic diagram that carrier signal produces the embodiment of circuit (3).Not gate U5A (74HC04 1/6) and crystal oscillator element BX2, capacitor C 11, C12, resistance R 7, R8 consist of crystal oscillating circuit; Not gate U5B (74HC04 1/6) and resistance R 9 are made buffering and are driven; Resistance R 10, R11, capacitor C 13 play dividing potential drop and R-C coupling effect; Inductance L 1 forms the LC frequency selection circuit with capacitor C 14a, C14b, and to obtain sine wave, the carrier signal of generation (CW) is delivered to modulation circuit (4).

Fig. 5 is the electrical schematic diagram of the embodiment of modulation circuit (4).Produce the carrier signal (CW) of circuit (3) from carrier signal through resistance R 12 and the dividing potential drop of potentiometer RP1 and the coupling of capacitor C 15, be connected to the base stage of triode VT1, resistance R 13, R14, R15, R18 and capacitor C 16 consist of biasing circuit and the working stability circuit of VT1, and resistance R 16, R17 are the collector load resistors of VT1.Produce the low-frequency time-code (TC) that circuit (2) comes from low-frequency time-code, through resistance R 19, be connected to the base stage of VT2, cut-off and the conducting of control VT2 are so that the carrier signal amplitude is modulated by low-frequency time-code.Modulated signal is through the coupling of capacitor C 17, and through resistance R 20, the LC frequency selection circuit that forms via inductance L 2 and capacitor C 18a, C18b is again exported modulated signal (MW).

Fig. 6 is the electrical schematic diagram of the embodiment of power amplification circuit (5).Modulated signal (MW) from modulation circuit (4) is through the dividing potential drop of potentiometer RP2, carry out power amplification by integrated audio power amplifier U6 (LM386), and through coupling capacitance C20, by the modulated signal (PMW) after the connector XP2 output amplification.Capacitor C 19 is decoupling capacitances of U6.

Fig. 7 is the electrical schematic diagram of the embodiment of power supply (6).Stable 6V DC voltage is connected to 5V stabilized voltage supply U4 (HT7550) through connector XP3, and the 5V voltage after the voltage stabilizing is connected to the each several part of this transponder through VCC, and GND is the common ground end of this transponder.In addition, resistance R 6 and voltage stabilizing diode VD3 consist of the simple and easy mu balanced circuit of 3.3V, go out from the VCC3V termination, specialize in the power supply that carrier wave produces circuit (3).And the power supply of power amplification circuit (5) is provided through the VCC6V end by stable 6V DC voltage.Capacitor C 3, C4, C5, C6, C7 are filter capacitors, and capacitor C 8, C9, C10 are the decoupling capacitances of each several part circuit.

Fig. 8 is the electrical schematic diagram of the embodiment of output transmitting element (7).The output transmitting element is comprised of several basic transmitting elements, is comprised of 3 basic transmitting elements among this embodiment.Each basic transmitting element is comprised of inductance L T1, capacitor C T1, resistance R T1 shown in the dotted line frame among Fig. 8, and inductance L T1 wherein consists of on bar magnet with enameled wire.Inductance L T1 and capacitor C T1 consist of antiresonant circuit, and resonance is in the carrier frequency of the low-frequency time-code time signal that will send, and resistance R T1 is connected in parallel between each basic transmitting element as the isolation resistance between each basic transmitting element.

Claims

1. a Navsat time service information turns low-frequency time-code time signal transponder, it receives the Navsat time service information, and forwarding is the low-frequency time-code time signal, it comprises at least low-frequency time-code and produces circuit, carrier signal produces circuit, modulation circuit, power amplification circuit, power supply, it is characterized in that: the RS-485 series interface part is arranged in this transponder, can receive the serial signal that contains the Navsat time service information that is suitable for teletransmission that namely sends with the balanced differential form that meets the RS-485 agreement, therefrom obtain precise time information, produced the low-frequency time-code time signal of high time service precision.

2. Navsat time service information according to claim 1 turns low-frequency time-code time signal transponder, it is characterized in that: this transponder contains single-chip microcomputer or microcontroller, Sheffer stroke gate or with door, the energy reception ﹠ disposal is with the combination serial signal Navsat time service information and that be embedded with the 1PPS pulse per second (PPS) that contains of balanced differential form transmission, it is 100～400 milliseconds rect.p. that single-chip microcomputer in this transponder or microcontroller can begin 0.80～0.95 second of p.s. to send the duration, this rect.p. string and the above-mentioned combination serial signal that is embedded with the 1PPS pulse per second (PPS) through Sheffer stroke gate or with door " with " result of logic, therefrom obtain the 1PPS pulse per second (PPS), obtain precise time, guaranteed the high time service precision of the low-frequency time-code time signal transmitted.

3. Navsat time service information according to claim 1 turns low-frequency time-code time signal transponder, it is characterized in that: the output transmitting element of this transponder is comprised of several basic transmitting elements, and each basic transmitting element is by telefault, electric capacity, resistance forms, described telefault is to consist of on bar magnet with enameled wire, described telefault and Capacitance parallel connection resonance are in the carrier frequency of the low-frequency time-code time signal that sends, described resistance is connected in parallel between each basic transmitting element as the isolation resistance between each basic transmitting element.