CN217770058U

CN217770058U - UHF frequency range transmitter and guide's explanation machine of guide's explanation machine

Info

Publication number: CN217770058U
Application number: CN202221716261.XU
Authority: CN
Inventors: 曾宪平; 王栓平
Original assignee: Shenzhen Zhongyi Electronics Co ltd
Current assignee: Shenzhen Zhongyi Electronics Co ltd
Priority date: 2022-03-18
Filing date: 2022-07-05
Publication date: 2022-11-08
Anticipated expiration: 2032-07-05

Abstract

The utility model discloses a UHF frequency range transmitter and guide's explanation machine of guide's explanation machine, the transmitter includes integrated form UHF frequency range transmission chip, antenna, singlechip, microphone interface and power supply circuit, integrated audio processor and radio frequency power amplifier have in the integrated form UHF frequency range transmission chip; the integrated UHF frequency range transmitting chip is electrically connected with the microphone interface and the antenna, an audio processor of the integrated UHF frequency range transmitting chip amplifies and frequency responds analog audio signals input by the microphone interface, then the analog audio signals are subjected to power amplification through the radio frequency power amplifier after being modulated inside the integrated UHF frequency range transmitting chip, and then the analog audio signals are transmitted outwards through the antenna; and the singlechip controls the working state of the integrated UHF frequency band transmitting chip. The utility model discloses make the working distance of the UHF frequency channel transmitter of guide's explanation machine far away, reduce interference, reduce cost.

Description

UHF frequency channel transmitter and guide explanation machine of guide explanation machine

Technical Field

The utility model relates to a tour guide explanation machine technical field especially relates to a UHF frequency channel transmitter and tour guide explanation machine of tour guide explanation machine.

Background

The guide explanation machine is used for explaining the machine that the visitor listened to at scenic spot sight spot guide, and it includes transmitter and receiver, and transmitter and receiver are used separately, wherein: the transmitter is worn by the tour guide, the receiver is worn by the tourist, and the receiver receives the voice signal sent by the transmitter and decodes and plays the voice signal for the tourist to listen to.

The transmitter products on the market mainly comprise a 2.4G digital frequency hopping scheme, a UHF frequency band single-chip scheme and a UHF frequency band ultra-inner difference split type receiving scheme.

The transmitter of the UHF frequency band single-chip scheme has good sound effect, but the transmitter of the scheme has the following problems:

the first is the problem of short working distance;

secondly, the number of channels is small, and the problem of interference is easy to occur;

thirdly, the circuit is complex and costly.

Thus, the prior art has yet to be improved.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing prior art, an object of the present invention is to provide a UHF band transmitter of a tour guide interpreter and a tour guide interpreter, which aims to make the working distance of the UHF band transmitter of the tour guide interpreter far away, reduce interference and reduce cost.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a UHF-band transmitter for a tour guide interpreter, comprising:

the integrated UHF frequency band transmitting chip comprises an integrated UHF frequency band transmitting chip, an antenna, a single chip microcomputer, a microphone jack and a power circuit, wherein an audio processor and a radio frequency power amplifier are integrated in the integrated UHF frequency band transmitting chip;

the integrated UHF frequency range transmitting chip is electrically connected with the microphone interface and the antenna, an audio processor of the integrated UHF frequency range transmitting chip amplifies and frequency-responds the analog audio signal input by the microphone interface, then the power of the analog audio signal is amplified by the radio-frequency power amplifier after the analog audio signal is modulated in the integrated UHF frequency range transmitting chip, and the analog audio signal is transmitted outwards by the antenna;

the single chip microcomputer is electrically connected with the integrated UHF frequency band emission chip and controls the working state of the integrated UHF frequency band emission chip;

the power circuit is electrically connected with the single chip microcomputer and the integrated UHF frequency band transmitting chip.

And a matching network is also connected between the antenna and the integrated UHF frequency band transmitting chip, and the matching network is formed by connecting a plurality of capacitors and inductors in series and/or in parallel.

The integrated UHF frequency band transmitting chip is KT0646M in model number.

The chip model of the single chip microcomputer is SC5108F16 or GB51F2832.

The power supply circuit comprises a battery charging management chip, a lithium battery, a power supply switch, an electronic delay switch and a voltage stabilizer;

the battery charging management chip is electrically connected with a USB charging interface, a 5V power supply input port and the lithium battery, the power supply switch is connected with the lithium battery and the voltage stabilizer, and the voltage stabilizer outputs stable voltage to the single chip microcomputer, the integrated UHF frequency band transmitting chip and the microphone plug interface;

the electronic time delay switch is connected in parallel at two ends of the power switch and is connected with the single chip microcomputer.

The electronic time delay switch is composed of triodes Q7 and Q8, an emitting electrode of the Q7 is connected with the lithium battery, a collecting electrode of the Q7 is connected with the voltage stabilizer, a base electrode of the Q7 is connected with a collecting electrode of the Q8, the base electrode of the Q8 is connected with the singlechip, and a base emitting electrode of the Q8 is grounded.

The model of the battery charging management chip is XT2052;

the voltage stabilizer is A3V voltage stabilizer and is LM1134A302MR in model number.

The single chip microcomputer is further connected with a display screen, a battery low-voltage detection circuit is further connected between the single chip microcomputer and the lithium battery, and the low-voltage detection circuit detects the voltage of the lithium battery and displays the voltage through the display screen.

And an isolation magnetic bead is connected between the voltage stabilizer and the integrated UHF frequency band transmitting chip.

The utility model discloses still provide a guide explanation machine, wherein, including aforementioned transmitter, still including receiving wireless signal's that the transmitter launches receiver.

It is understood that within the scope of the present invention, the technical features mentioned above and those specifically described in the following (for example, in the embodiments) can be combined with each other to constitute new or preferred technical solutions, to be limited to space, which will not be described one by one herein.

The utility model discloses a UHF frequency channel transmitter of guide's explanation machine, through using integrated form UHF frequency channel transmission chip, this integrated form UHF frequency channel transmission chip internal integration has audio processor and radio frequency power amplifier, can directly handle audio signal and amplify radio frequency signal and then launch, need not special audio frequency processing chip and radio frequency power amplification chip, simplify the circuit, save the cost, simultaneously because built-in radio frequency power amplifier has, so can promote radio frequency signal's amplification gain, improve working distance, simultaneously the utility model discloses an integrated form UHF frequency channel transmission chip, it can set up the channel many, can effectively avoid disturbing.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic circuit diagram of a UHF-band transmitter according to a first embodiment of the tourist guide interpreter of the present invention;

FIG. 2 is a schematic circuit diagram of a chip in the transmitter circuit;

FIG. 3 is a schematic diagram of the circuit connections of a display screen in the transmitter circuit;

FIG. 4 is a schematic diagram of the circuit connection of the antenna and the matching network in the transmitter circuit;

FIG. 5 is a schematic diagram of circuit connection of an integrated UHF band transmitting chip and a microphone jack in a transmitter circuit;

FIG. 6 is a schematic diagram of the circuit connection between the battery charging management chip and the lithium battery;

FIG. 7 is a schematic diagram of the circuit connections of the power switch, the electronic delay switch and the voltage regulator.

Description of reference numerals:

the system comprises a 100-transmitter, a 1-integrated UHF frequency band transmitting chip, a 2-antenna, a 3-single chip microcomputer, a 4-microphone interface, a 5-power circuit, a 51-battery charging management chip, a 52-lithium battery, a 53-power switch, a 54-electronic delay switch, a 55-voltage stabilizer, a 6-matching network, a 71-USB charging interface, a 72-5V power input port, an 8-display screen, a 9-low voltage detection circuit, a 10-isolation magnetic bead, an 11-key, a 12-LED backlight lamp and a 13-microphone power supply circuit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, back \8230;) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "connected" may be a fixed connection or a removable connection, or may be integral therewith; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Referring to fig. 1, the present invention provides a UHF-band transmitter 100 for a tour guide interpreter, which includes:

the integrated UHF radio frequency transmitting device comprises an integrated UHF radio frequency transmitting chip 1, an antenna 2, a single chip microcomputer 3, a microphone interface 4 and a power circuit 5, wherein an audio processor and a radio frequency power amplifier are integrated in the integrated UHF radio frequency transmitting chip 1. The utility model discloses an audio processor in integrated form UHF frequency channel emission chip 1 can directly enlarge audio signal, and the frequency response is handled, and the radio frequency power amplifier in integrated form UHF frequency channel emission chip 1 can directly carry out power amplification to the radio frequency signal after the modulation. The utility model discloses an integrated form UHF frequency channel emission chip still is provided with the radio frequency generator in 1 for produce radio frequency carrier signal etc..

The utility model discloses an antenna 2 adopts the spring antenna. The utility model discloses a microphone interface 4 is used for pegging graft outside microphone. The microphone jack 4 in this embodiment may be directly an earphone jack.

The integrated UHF frequency range transmitting chip 1 is electrically connected with the microphone interface 4 and the antenna 2, an audio processor of the integrated UHF frequency range transmitting chip 1 amplifies and frequency-responds analog audio signals input by the microphone interface 4, then the analog audio signals are power-amplified by the radio-frequency power amplifier after being modulated inside the integrated UHF frequency range transmitting chip 1, and then the analog audio signals are transmitted outwards by the antenna 2.

The microphone interface 4 receives analog audio signals collected by an external microphone, and then the analog audio signals are amplified and frequency response processed by an audio processor in the integrated UHF frequency band transmitting chip 1, carrier signals are generated in the integrated UHF frequency band transmitting chip 1 and can be modulated by the audio signals, the modulated radio frequency signals are subjected to power amplification through a radio frequency power amplifier built in the integrated UHF frequency band transmitting chip 1 so as to increase the transmitting power of the radio frequency signals, and the radio frequency signals subjected to power amplification are transmitted outwards through the antenna 2.

That is, the utility model discloses an integrated form UHF frequency channel transmitting chip 1 can directly handle audio signal, can directly carry out power amplification to radio frequency signal again.

The utility model discloses transmitter 100 singlechip 3 with integrated form UHF frequency channel emission chip 1 electricity is connected, singlechip 3 control integrated form UHF frequency channel emission chip 1's operating condition. For example, the single chip microcomputer 3 sets the working state of the integrated UHF band transmitting chip 1, and controls the working frequency, the transmitting power, the pilot frequency parameters and the like of the integrated UHF band transmitting chip.

The power circuit 5 is electrically connected with the singlechip 3 and the integrated UHF frequency range transmitting chip 1. And the power circuit 5 supplies power to the singlechip 3, the integrated UHF frequency range transmitting chip 1 and the like.

The utility model discloses a transmitter 100 is owing to adopted integrated form UHF frequency channel transmission chip 1, and radio frequency power amplifier in it can directly amplify radio frequency signal, increases the transmitting power of antenna, can carry out remote transmission like this, thereby makes the utility model discloses a transmitter 100 is suitable for remote work for the increase of prior art's transmitter 100 working distance. And simultaneously, because the utility model discloses transmitter 100's integrated form UHF frequency channel transmitting chip 1, its inside audio processor that has integrateed can directly handle the audio frequency that the microphone was gathered, need not solitary audio frequency and handles the chip, like this owing to built-in radio frequency power amplifier and audio processor, can optimize whole transmitter 100's circuit structure, reduce cost. Thirdly, the utility model discloses an integrated form UHF frequency channel emission chip 1 has a plurality of channels, can solve the adjacent problem that produces the interference of channel.

Preferably, the single chip microcomputer 3 of the present invention is further connected to a key 11, a display screen 8 and an LED backlight 12 of the display screen. The keys 11 include keys for muting a microphone, selecting a transmission power, selecting a transmission channel, and the like. The display screen 8 can carry out working channel, battery power, microphone on/off state etc. and show, preferably, as shown in fig. 3, the utility model discloses a display screen 8 is the LCD display screen. The LED backlight 12 provides backlight for the display screen 8.

Specifically, as shown in fig. 2, the chip type of the single chip microcomputer 3 of the present invention is SC5108F16 or GB51F2832.

The utility model discloses singlechip 3 mainly is responsible for following function:

1. the microphone mute key S1, the transmission power high-low selection key S2 and the transmission channel selection keys S3 and S4 which are responsible for the product are operated to drive the LCD display screen to display.

2. And the integrated UHF frequency range transmitting chip 1 is in data communication, the working state of the integrated UHF frequency range transmitting chip 1 is set, and the working frequency, the transmitting power, the pilot frequency parameters and the like of the integrated UHF frequency range transmitting chip are controlled.

3. Is responsible for battery low voltage detection and LED backlight 12 control of the LCD display.

Preferably, as shown in fig. 1, a matching network 6 is further connected between the antenna 2 and the integrated UHF-band transmitting chip 1, and the matching network 6 is formed by connecting a plurality of capacitors and inductors in series and/or in parallel. The matching network 6 performs matching selection on the UHF-band radio frequency signal, where the matching network 6 is formed by connecting a plurality of capacitors and inductors in series and/or in parallel, and specifically, as shown in fig. 4, the matching network 6 of this embodiment is formed by C62, C10, C9, L5, L8, and the like. The matching network 6 of the present embodiment is also connected to a power supply circuit 5 to supply power to the matching network 6.

Specifically, as shown in fig. 5, the model of the integrated UHF band transmitting chip 1 of the transmitter 100 of the present invention is KT0646M.

KT0646M chip is inside to have integrateed the high-fidelity audio frequency treater, and hyperstable radio frequency generator has guaranteed that audio signal is undistorted, and KT0646M chip has integrated RF power amplifier simultaneously, and output reaches 18dBm, has guaranteed the utility model discloses transmitter 100's operating distance is greater than 100 meters.

The KT0646M chip works in a 470-960MHz frequency band, and in the broadband design, a plurality of frequency channels can be arranged, so that the problem of interference generated by the adjacent frequency channels is solved. The chip integrates a plurality of functional modules, has few peripheral elements, optimizes circuit design, simplifies production procedures and reduces the production cost of the transmitter 100.

Further, as shown in fig. 1, fig. 6 and fig. 7, the power circuit 5 of the transmitter 100 of the present invention includes a battery charging management chip 51, a lithium battery 52, a power switch 53, an electronic delay switch 54 and a voltage stabilizer 55. The battery charging management chip 51 manages the charging and discharging of the lithium battery 52, the power switch 53 controls the on and off of the whole transmitter 100, and the electronic delay switch 54 delays the shutdown of the whole transmitter 100. The voltage regulator 55 converts the output voltage of the lithium battery 52 into a stable operating voltage.

The battery charging management chip 51 is electrically connected with a USB charging interface 71, a 5V power input port 72 and the lithium battery 52, the power switch 53 is connected with the lithium battery 52 and the voltage stabilizer 55, and the voltage stabilizer 55 outputs a stable voltage to the single chip microcomputer 3, the integrated UHF band transmitting chip 1 and the microphone jack 4. The USB charging interface 71 can be directly connected to an external power source through a USB cable, the 5V power input port 72 is connected to an external 5V power source, for example, a dedicated 5V charging box with multiple output ports, the 5V power input port 72 on the transmitter 100 can be a contact, the output port of the dedicated 5V charging box can be a thimble, and the thimble can charge the transmitter 100 after abutting against the contact. This example utility model transmitter 100 has two ways to charge the internal lithium battery 52.

The utility model discloses a singlechip 3, integrated form UHF frequency channel emission chip 1 and microphone interface 4, and matching network 6's operating voltage all are the regulated voltage power supply of exporting after stabiliser 55 conversion by lithium cell 52 voltage. The voltage of the microphone supply circuit 13 as shown in fig. 5 is supplied by a voltage regulator 55, which supplies the microphone directly after it is plugged into the microphone jack 4.

The electronic time delay switch 54 of the utility model is connected in parallel at the two ends of the power switch 53 and connected with the single chip microcomputer 3. Namely, the input end of the electronic delay switch 54 is connected with the lithium battery 52, and the output end is connected with the voltage stabilizer 55 and is controlled by the singlechip 3. Thus, in a period of time after the power switch 53 turns off the power of the whole machine, the lithium battery 52 can be connected with the voltage stabilizer 55 through the electronic delay switch 54 in the conducting state to continue to provide power for the whole machine, and after the set delay time, the single chip microcomputer 3 turns off the electronic delay switch 54 again to disconnect the lithium battery 52 from the voltage stabilizer 55, so that the machine is finally turned off. The electronic delay switch 54 protects the transmitter 100 and continues to delay the operation for a set time after being suddenly turned off, preventing data loss and protecting the device.

Specifically, as shown in fig. 7, the electronic delay switch 54 is composed of triodes Q7 and Q8, an emitter of the Q7 is connected to the lithium battery 52, a collector of the Q7 is connected to the voltage stabilizer 55, a base of the Q7 is connected to a collector of the Q8, a base of the Q8 is connected to the single chip microcomputer 3, and a base emitter of the Q8 is grounded. The singlechip 3 controls the level of the base of the Q8 to control the on-off of the Q8 and further control the on-off of the Q7, and the on-off of the Q7 enables the lithium battery 52 and the stabilizer 55 to be switched on or off, so that the automatic shutdown is realized after the on-off delay and the preset time are reached.

As shown in fig. 6, the battery charging management chip 51 of the present invention has model number XT2052; the XT2052 chip can charge the lithium battery 52 and protect the lithium battery 52. An LED2 is also connected between the battery charge management chip 51 and the lithium battery 52, and the LED2 indicates the charge state.

Preferably, as shown in fig. 7, the regulator 55 of the present invention is A3V regulator, model No. LM1134a302MR. The LM1134A302MR chip provides 3V direct current voltage for the single chip microcomputer 3, the integrated UHF frequency range transmitting chip 1, the microphone interface 4 and the matching network 6.

Preferably, as shown in fig. 1 and 2, the single chip microcomputer 3 and the lithium battery 52 are connected with a battery low voltage detection circuit 9, the low voltage detection circuit 9 detects the voltage of the lithium battery 52 and the corresponding electric quantity display is performed through the display screen 8.

Preferably, as shown in fig. 1 and 7, an isolation magnetic bead 10 is further connected between the voltage stabilizer 55 and the integrated UHF-band transmitting chip 1. The isolation magnetic beads 10 can prevent the input power from interfering with the operation of the integrated UHF transmission chip 1.

The utility model discloses still provide a guide's explanation machine, including foretell transmitter 100, still including receiving transmitter 100 launches radio signal's receiver. Because this guide explanation machine has adopted foretell transmitter 100, so the utility model discloses a guide explanation machine working distance is far away, and the circuit cost is low simultaneously.

The embodiment of the utility model provides a UHF frequency channel transmitter 100 and guide explanation machine of guide explanation machine, through using integrated form UHF frequency channel transmission chip 1, this integrated form UHF frequency channel transmission chip 1 internal integration has audio processor and radio frequency power amplifier, can directly handle audio signal and amplify radio frequency signal and then transmit, need not special audio frequency processing chip and radio frequency power amplification chip, the circuit has been simplified, the cost is saved, simultaneously because it has radio frequency power amplifier to embed, the event can promote radio frequency signal's amplification gain, increase transmission distance, simultaneously the utility model discloses transmitter 100's integrated form UHF frequency channel transmission chip 1, it can set up a plurality of channels, can avoid the interference effectively.

The above only for the purpose of clearly illustrating the examples of the present invention, not limiting the scope of the present invention, can't be exhausted to all the embodiments, all the concepts of the present invention, utilize the equivalent structure transformation of the content of the technical solution of the present invention, or directly/indirectly use in other related technical fields and are all included in the protection scope of the present invention.

Claims

1. A UHF frequency band transmitter of a tour guide interpreter, comprising:

the integrated UHF frequency range transmitting chip is electrically connected with the microphone interface and the antenna, an audio processor of the integrated UHF frequency range transmitting chip amplifies and frequency responds analog audio signals input by the microphone interface, then the analog audio signals are subjected to power amplification through the radio frequency power amplifier after being modulated inside the integrated UHF frequency range transmitting chip, and then the analog audio signals are transmitted outwards through the antenna;

2. The UHF band transmitter of the tour guide interpreter of claim 1, wherein a matching network is further connected between the antenna and the integrated UHF band transmitting chip, and the matching network is composed of a plurality of capacitors and inductors connected in series and/or in parallel.

3. The UHF band transmitter of the tour guide interpreter of claim 1, wherein the integrated UHF band transmitting chip is KT0646M.

4. The UHF frequency band transmitter of the tour guide interpreter of claim 1, wherein the chip model of the single chip microcomputer is SC5108F16 or GB51F2832.

5. The UHF-band transmitter of the tour guide interpreter of claim 1, wherein the power circuit comprises a battery charge management chip, a lithium battery, a power switch, an electronic delay switch, and a voltage regulator;

6. The UHF band transmitter of the tourist explaining machine as claimed in claim 5, wherein the electronic time delay switch is composed of transistors Q7 and Q8, the emitter of the Q7 is connected to the lithium battery, the collector of the Q7 is connected to the voltage stabilizer, the base of the Q7 is connected to the collector of the Q8, the base of the Q8 is connected to the single chip microcomputer, and the base emitter of the Q8 is grounded.

7. The UHF band transmitter of the tour guide interpreter of claim 5, wherein the battery charging management chip model is XT2052;

the voltage stabilizer is A3V voltage stabilizer and is of the type LM1134A302MR.

8. The UHF frequency range transmitter of the guide explaining machine of claim 5, wherein the single chip microcomputer is further connected with a display screen, a battery low voltage detection circuit is further connected between the single chip microcomputer and the lithium battery, and the low voltage detection circuit detects the voltage of the lithium battery and displays the voltage through the display screen.

9. The UHF transmitter for the tour guide interpreter of claim 5, wherein an isolation magnetic bead is further connected between the voltage stabilizer and the integrated UHF transmitting chip.

10. A tour guide interpreter comprising a transmitter according to any one of claims 1 to 9 and further comprising a receiver for receiving a wireless signal transmitted by said transmitter.