CN204699399U - A kind of remote control receive-transmit system of wireless toy car - Google Patents
A kind of remote control receive-transmit system of wireless toy car Download PDFInfo
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- CN204699399U CN204699399U CN201520232628.4U CN201520232628U CN204699399U CN 204699399 U CN204699399 U CN 204699399U CN 201520232628 U CN201520232628 U CN 201520232628U CN 204699399 U CN204699399 U CN 204699399U
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- 238000012544 monitoring process Methods 0.000 claims description 13
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- 239000013078 crystal Substances 0.000 abstract description 3
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Abstract
The utility model relates to a kind of remote control receive-transmit system of wireless toy car, comprise transmitting terminal and receiving terminal, system adopts the phase-locked loop circuit of band frequency divider to coordinate frequency mixer to realize the modulation and demodulation of mode of frequency regulation, obtaining the carrier signal of different frequency by changing the divide ratio K of frequency divider, making a 24.576MHZ crystal be enough to realize the modulation and demodulation under 27M bandwidth sum 49M bandwidth and under each bandwidth, all have 4 independent channels.Compared to the remote control receive-transmit system of old-fashioned wireless toy car, adopt the mode of frequency modulation to carry out remote control, support that multistage speed controls, remote control distance is far away, and support that multi-section car is played simultaneously and is independent of each other, stand-by time is long, possesses motor overcurrent protection; While lifting overall performance, peripheral circuits, does not improve the cost of whole system.
Description
Technical field
The utility model belongs to toy designs development technique field, particularly relates to a kind of remote control receive-transmit system of wireless toy car.
Background technology
As the telecar of toys purposes, its consumption demand is increasing.The quality of the remote control receive-transmit system of wireless toy car, is directly connected to the serviceability of remote-control toy vehicle, directly has influence on the comfort of player exercises, joyful sense.
And the remote control receive-transmit system of wireless toy car in the market, nearly all adopt the mode of amplitude modulation to carry out remote control, not only remote control distance is near, and anti-interference is poor, single speed class, and stand-by time is short, without motor defencive function.
Utility model content
In order to overcome defect and the problem of the existence of above-mentioned prior art, the utility model provides a kind of remote control receive-transmit system of wireless toy car, the phase-locked loop circuit of band frequency divider is adopted to coordinate frequency mixer to realize the modulation and demodulation of mode of frequency regulation, support multistage speed controls, remote control distance is far away, support that multi-section car is played simultaneously and is independent of each other, stand-by time is long, possesses motor overcurrent protection function; While lifting overall performance, peripheral circuits, does not improve the cost of whole system.
The technical solution of the utility model is:
A kind of remote control receive-transmit system of wireless toy car, comprise transmitting terminal and receiving terminal, system adopts the phase-locked loop circuit of band frequency divider to coordinate frequency mixer to realize the modulation and demodulation of mode of frequency regulation, obtaining the carrier signal of different frequency by changing the divide ratio K of frequency divider, making a 24.576MHZ crystal be enough to realize the modulation and demodulation under 27M bandwidth sum 49M bandwidth and under each bandwidth, all have 4 independent channels.
Described transmitting terminal comprises monitoring input and electric power management circuit, digital encoding circuit, frequency mixer, power amplifier, phaselocked loop, oscillating circuit, linear stable and peripheral circuit; Linear stabilized power supply provides operating voltage for transmitting terminal each several part circuit, be subject to monitoring input to control with the management of electric power management circuit simultaneously, oscillating circuit is connected to frequency mixer by phase-locked loop circuit, monitoring input and electric power management circuit are connected to frequency mixer through digital encoding circuit, frequency mixer is connected to power amplifier, and output launched by power amplifier.
The peripheral circuit of described transmitting terminal does not use conventional slide potentiometer to regulate as gear, but drives sheet metal slip to realize grade speeds control by action bars.
Described receiving terminal comprises antenna, low noise amplifier circuit LNA, frequency mixer, automatic gain control circuit, analog-digital converter ADC, digital filter, command response logical output circuit, voltage comparator, phase-locked loop circuit, oscillating circuit and linear stable; Linear stable provides operating voltage for receiving terminal each several part circuit, antenna is connected with frequency mixer by low noise amplifier circuit LNA, oscillating circuit is connected with frequency mixer by phase-locked loop circuit, frequency mixer is connected with automatic gain control circuit, analog-digital converter, digital filter, command response logical output circuit successively, outside detection voltage is connected with command response logical output circuit through over-voltage comparator, and command response logical output circuit controls to export.
Described phase-locked loop circuit is made up of phase discriminator, charge pump, low pass filter, voltage controlled oscillator and divide ratio device; The output of oscillator is connected with phase discriminator, and phase discriminator is connected with charge pump, low pass filter, voltage controlled oscillator successively, and voltage controlled oscillator is connected to phase discriminator by divide ratio device, forms backfeed loop, and voltage controlled oscillator exports high frequency clock PLL_OUT.
The pin level that the monitoring input of described transmitting terminal and electric power management circuit Real-Time Monitoring input key operate, if when being high level without any operation and corresponding pin, closing the power supply supply of other partial circuits of transmitting terminal immediately, makes transmitting terminal enter standby mode; During player exercises, corresponding pin is low level, and open the power supply supply of all circuit immediately, transmitting terminal enters normal operating conditions.
Described receiving terminal possesses motor overcurrent protection function, when motor overcurrent being detected, closes motor immediately and exports.
Accompanying drawing explanation
Fig. 1 is transmitting terminal block diagram of the present utility model.
Fig. 2 is transmitting terminal speed class control circuit figure of the present utility model.
Fig. 3 is receiving terminal block diagram of the present utility model.
Fig. 4 is phase-locked loop circuit block diagram of the present utility model.
Fig. 5 is the standby overhaul flow chart of transmitting terminal of the present utility model.
Fig. 6 is that receiving terminal of the present utility model is to motor overcurrent protection block diagram.
Fig. 7 is that receiving terminal of the present utility model is to motor overcurrent protection flow chart.
Detailed description of the invention
Below in conjunction with accompanying drawing and operation principle, the utility model is further illustrated.
The utility model is a kind of receive-transmit system controlled for wireless toy car, comprises transmitting terminal and receiving terminal.
Described transmitting terminal comprises monitoring input and electric power management circuit, digital encoding circuit, frequency mixer, power amplifier, phaselocked loop, oscillating circuit, linear stable and peripheral circuit, with reference to Fig. 1; Linear stabilized power supply provides operating voltage for transmitting terminal each several part circuit, be subject to monitoring input to control with the management of electric power management circuit simultaneously, oscillating circuit is connected to frequency mixer by phase-locked loop circuit, monitoring input and electric power management circuit are connected to frequency mixer through digital encoding circuit, frequency mixer is connected to power amplifier, and output launched by power amplifier.
The peripheral circuit of described transmitting terminal does not use conventional slide potentiometer to regulate as gear, but drives sheet metal slip to realize speed class control, with reference to Fig. 2 by action bars.Sheet metal has 4 contacts, when action bars is at diverse location, 4 contacts of sheet metal are also at diverse location, pin " F ", " B ", " SP1 ", " SP2 " are again inner pull-up, so pin " F ", " B ", " SP1 ", " SP2 " produce different level states when action bars is in diverse location, and then corresponding different speed class.After coded excitation, receiving terminal parses corresponding order, exports duty ratio corresponding, controls the speed of wheel.The speeds control that pin " F ", " B ", " SP1 ", " SP2 " varying level state are corresponding, as shown in table 1 below.
Table 1
Note: " H " represents logic high; " L " represents logic low; " * " representative need not be concerned about.
Described receiving terminal comprises antenna, low noise amplifier circuit LNA, frequency mixer, automatic gain control circuit, analog-digital converter ADC, digital filter, command response logical output circuit, voltage comparator, phase-locked loop circuit, oscillating circuit and linear stable, as shown in Figure 3; Linear stable provides operating voltage for receiving terminal each several part circuit, antenna is connected with frequency mixer by low noise amplifier circuit LNA, oscillating circuit is connected with frequency mixer by phase-locked loop circuit, frequency mixer is connected with automatic gain control circuit, analog-digital converter, digital filter, command response logical output circuit successively, outside detection voltage is connected with command response logical output circuit through over-voltage comparator, and command response logical output circuit controls to export.
Described phase-locked loop circuit is made up of phase discriminator, charge pump, low pass filter, voltage controlled oscillator and divide ratio device, as shown in Figure 4; The output of oscillator is connected with phase discriminator, and phase discriminator is connected with charge pump, low pass filter, voltage controlled oscillator successively, and voltage controlled oscillator is connected to phase discriminator by divide ratio device, forms backfeed loop, and voltage controlled oscillator exports high frequency clock PLL_OUT.
Phase-locked loop circuit exports high frequency clock PLL_OUT=K*Fin, Fin is the output clock of oscillator, K is divide ratio, by changing divide ratio K value, just can obtain different carrier signals, therefore the modulation and demodulation under system only needs a 24.576MHZ crystal just can realize 27M bandwidth sum 49M bandwidth, and under each bandwidth, all have 4 independent channels.The center frequency point of different channels, as shown in table 2 below.
Table 2
Carrier signal required for different channel, the code signal mixing produced with transmitting terminal digital encoding circuit obtains modulation signal, directly launches output through power amplification.Receiving terminal receives by antenna the modulation signal that transmitting terminal sends, this modulation signal amplifies through low noise amplifier circuit LNA, carry out mixing with carrier wave and obtain intermediate-freuqncy signal, again through automatic gain control circuit, output voltage values meets the signal of analog-digital converter ADC input range, obtains data signal through analog-digital converter ADC, and data signal is through multistage digital filter, realize bandpass filtering, effectively inhibit the interfering signal of adjacency channel.
Due under each bandwidth, all there are 4 independently channels, so support that the car of multi-section different channel is played together.In addition the signal that receives of receiving terminal is after demodulation, amplifying, data signal is converted to again through analog-digital converter ADC, and by the further filter out-band external signal of digital filter, system rejection to disturbance is strengthened greatly, rejection ratio between leading the way is greater than 40db, and the car of multi-section different channel is played together and do not affected mutually.
The pin level of transmitting terminal monitoring input key operation, if without any operation, corresponding pin level is high (inner pull-up), close the power supply supply of digital encoding circuit, oscillating circuit, phase-locked loop circuit, frequency mixer and power amplifier immediately, now transmitting terminal is in standby mode, and power consumption is extremely low; When player exercises, corresponding pin level is low level, and open the power supply supply of all circuit immediately, transmitting terminal is in normal mode of operation, coded modulation is exported.Testing process is with reference to Fig. 5.
Native system has motor overcurrent protection function, and receiving terminal is monitored motor current, realizes motor overcurrent protection.The voltage of Rfb resistance on motor current loop is connected on by pin " VFB " monitoring.Once Vfb voltage be greater than 0.18V and the duration more than 7 seconds, the electric current namely on motor loop has exceeded 0.18/Rfb, receiving terminal close immediately motor export.Until detect that Vfb voltage is less than 0.18V and the duration does not receive effective order more than 600ms, just normal operating conditions can be returned to, the order that response is corresponding.Fig. 6 is motor overcurrent protection schematic diagram, and Fig. 7 is motor overcurrent protection overhaul flow chart.
Claims (4)
1. a remote control receive-transmit system for wireless toy car, comprises transmitting terminal and receiving terminal, it is characterized in that:
Described transmitting terminal comprises monitoring input and electric power management circuit, digital encoding circuit, frequency mixer, power amplifier, phaselocked loop, oscillating circuit, linear stable and peripheral circuit, linear stabilized power supply provides operating voltage for transmitting terminal each several part circuit, be subject to monitoring input to control with the management of electric power management circuit simultaneously, oscillating circuit is connected to frequency mixer by phase-locked loop circuit, monitoring input and electric power management circuit are connected to frequency mixer through digital encoding circuit, frequency mixer is connected to power amplifier, and output launched by power amplifier;
Described receiving terminal comprises antenna, low noise amplifier circuit LNA, frequency mixer, automatic gain control circuit, analog-digital converter ADC, digital filter, command response logical output circuit, voltage comparator, phase-locked loop circuit, oscillating circuit and linear stable, linear stable provides operating voltage for receiving terminal each several part circuit, antenna is connected with frequency mixer by low noise amplifier circuit LNA, oscillating circuit is connected with frequency mixer by phase-locked loop circuit, frequency mixer successively with automatic gain control circuit, analog-digital converter, digital filter, command response logical output circuit is connected, outside detection voltage is connected with command response logical output circuit through over-voltage comparator, command response logical output circuit controls to export.
2. the remote control receive-transmit system of wireless toy car as claimed in claim 1, is characterized in that: described phase-locked loop circuit is made up of phase discriminator, charge pump, low pass filter, voltage controlled oscillator and divide ratio device; The output of oscillator is connected with phase discriminator, and phase discriminator is connected with charge pump, low pass filter, voltage controlled oscillator successively, and voltage controlled oscillator is connected to phase discriminator by divide ratio device, forms backfeed loop, and voltage controlled oscillator exports high frequency clock PLL_OUT.
3. the remote control receive-transmit system of wireless toy car as claimed in claim 1, is characterized in that: the peripheral circuit of described transmitting terminal drives sheet metal to slide by action bars and realizes grade speeds control.
4. the remote control receive-transmit system of wireless toy car as claimed in claim 1, is characterized in that: described receiving terminal possesses motor overcurrent protection function, when motor overcurrent being detected, closes motor immediately and exports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520232628.4U CN204699399U (en) | 2015-04-16 | 2015-04-16 | A kind of remote control receive-transmit system of wireless toy car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520232628.4U CN204699399U (en) | 2015-04-16 | 2015-04-16 | A kind of remote control receive-transmit system of wireless toy car |
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| Publication Number | Publication Date |
|---|---|
| CN204699399U true CN204699399U (en) | 2015-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520232628.4U Active CN204699399U (en) | 2015-04-16 | 2015-04-16 | A kind of remote control receive-transmit system of wireless toy car |
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| Country | Link |
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| CN (1) | CN204699399U (en) |
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2015
- 2015-04-16 CN CN201520232628.4U patent/CN204699399U/en active Active
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| TR01 | Transfer of patent right |
Effective date of registration: 20231020 Address after: 518000 706, Zhonghua science and technology building, Guangxia Road, shangmeilin, Futian District, Shenzhen, Guangdong Province Patentee after: Shenzhen Zhihua Technology Co.,Ltd. Address before: Room 801, 802, 807, and 808, Building 6, Optics Valley International Headquarters, No. 62 Optics Valley Avenue, Donghu New Technology Development Zone, Wuhan City, Hubei Province, 430000 Patentee before: WUHAN ESHINE-IC TECHNOLOGY Co.,Ltd. |