CN208079073U - Digital coding wireless transmission and receiving device - Google Patents
Digital coding wireless transmission and receiving device Download PDFInfo
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- CN208079073U CN208079073U CN201820690128.9U CN201820690128U CN208079073U CN 208079073 U CN208079073 U CN 208079073U CN 201820690128 U CN201820690128 U CN 201820690128U CN 208079073 U CN208079073 U CN 208079073U
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Abstract
The utility model discloses a kind of digital coding wireless transmission and receiving devices, belong to technical field of radio.The utility model includes emitting portion and receiving portion, and wherein emitting portion includes coding circuit and radiating circuit, and the coding circuit uses HT-12E integrated circuits, and required control instruction signal is generated by switch control coding circuit；The radiating circuit is for generating carrier wave, and by control instruction signal modulation on carrier wave, emitted antenna sends brewed carrier wave；Receiving portion includes receiving circuit, signal processing circuit and decoding circuit, reception antenna received signal is sent to decoding circuit by the receiving circuit through the selection of high frequency section after signal processing circuit carries out signal enhanced processing, and the decoding circuit carries out signal decoding using HT-12D integrated circuits.The utility model overcomes the shortcomings of conventional wireless remote controler poor anti-interference, mutual crosstalk.
Description
Technical field
The utility model belongs to robot, unmanned aerial vehicle command remote control domain technology field, and in particular to a kind of number volume
Code wireless transmission and receiving device.
Background technology
Digital coding wireless remote control technology is widely used, especially in robot, unmanned aerial vehicle command remote control field
In.For example, in the Chinese Engineering Robot contest held every year and International Publication match, the student from home and abroad has 6000 people
Competition field is converged in left and right, numerous and confused show robot technical merit, and various wireless remote control devices can be found everywhere on place, and airborne electromagnetic is dry
Disturbing often makes control instruction failure.Thus, it is accordingly required in particular to which a kind of strong anti-interference performance, secrecy effect are good, can overcome mutual crosstalk
Wireless transmission and receiving device.
Invention content
The utility model aim is to provide that a kind of strong anti-interference performance, secrecy effect is good, can overcome the number of mutual crosstalk
Encode wireless transmission and receiving device.
Specifically, the utility model is realized using following technical scheme：Including emitting portion and receiving portion,
Middle emitting portion includes coding circuit and radiating circuit, and the coding circuit uses HT-12E integrated circuits, is compiled by switch control
Code circuit generates required control instruction signal；The radiating circuit exists control instruction signal modulation for generating carrier wave
On carrier wave, emitted antenna sends brewed carrier wave；Receiving portion includes receiving circuit, signal processing circuit and solution
Selection of the reception antenna received signal through high frequency section is carried out signal by code circuit, the receiving circuit through signal processing circuit
Decoding circuit is sent to after enhanced processing, the decoding circuit carries out signal decoding using HT-12D integrated circuits.
Furthermore, logical one is by the low level of 2 clock cycle and 1 in the digital coding that coding circuit generates
The high level of clock cycle is constituted；Logical zero is made of the low level of 1 clock cycle and the high level of 2 clock cycle.
Furthermore, the control instruction signal constitutes a word signal by 8 bit address and 4 data, and first 8 are ground
Location, latter 4 are data.
Furthermore, the coding circuit effectively sends 4 word signals every time.
Furthermore, the radiating circuit use time-devision system amplitude keying high frequency transmission circuit, including LC oscillating circuits,
First inductance (L3) and input resistance (R16), the LC oscillating circuits are by the first capacitance (C14), trimmer (C15),
Two inductance (L4) and triode (V5) are constituted, and the output signal of HT-12E is followed by through the input resistance of triode (V5) (R16)
Enter the base stage of triode (V5)；Trimmer (C15) is in parallel with the second inductance (L4), and the termination of trimmer (C15) one first
Inductance (L3), the collector of another termination triode (V5)；First capacitance (C14) one terminates the first inductance (L3), another termination
The base stage of triode (V5)；First inductance (L3) one terminates mains side, first capacitance of termination (C14) and trimmer (C15),
It prevents high-frequency signal from flowing to power supply, while DC channel is provided to triode (V5)；Trimming capacitor C 15 is for changing oscillation frequency
Rate, the second inductance (L4) is made of the copper film of pcb board, as built-in transmitting antenna；The emitter of triode (V5) connects
Ground.
Furthermore, receiving circuit uses superregenerative high frequency receiving circuit.
Furthermore, the receiving circuit includes reception antenna, the first capacitance (C1), first resistor (R1), the second electricity
Hinder (R2), 3rd resistor (R3), diode (V1) and superregenerative high frequency receiving circuit, the superregenerative high frequency receiving circuit by
Triode (V2), the second capacitance (C2), the 4th capacitance (C4), the first inductance (L1), the 5th capacitance (C5), third capacitance (C3),
Second inductance (L2), the 5th resistance (R5), the 4th resistance (R4) and the 6th capacitance (C6) composition；One end of first resistor (R1) passes through
Second resistance (R2) is connected with the base stage of triode (V2), one end phase of the other end of first resistor (R1) and the 4th resistance (R4)
Even, the other end of the 4th resistance (R4) is connected to the first inductance (L1)；One end of 3rd resistor (R3) is connected to triode (V2)
Base stage, the other end is connected to the anode of diode (V1)；First capacitance (C1) one terminates reception antenna input terminal, and the other end connects
It is connected on the base stage of triode (V2)；First resistor (R1), second resistance (R2), 3rd resistor (R3) determine the work of triode (V2)
Make a little, diode (V1) makes the base voltage clamper of triode (V2) in 0.7V or more, stablizes the operating point of triode (V2)；The
Five capacitances (C5) one terminate the collector of triode (V2), and the emitter of another termination triode (V2) plays positive feedback effect；The
One inductance (L1) one terminates the collector of triode (V2), and the other end is connected through the 4th resistance (R4) with signal processing circuit；The
Four capacitances (C4) are in parallel with the first inductance (L1), are trimmer, and receives frequency and hair can be changed by adjusting the 4th capacitance (C4)
Penetrate Frequency Synchronization；Second inductance one end (L2) is connected with the emitter of triode (V2), and the other end and the 5th resistance (R5) are connected
Filter circuit is constituted, the other end of the 5th resistance (R5) is connected to the cathode of diode (V1), the connection of the 6th one end capacitance (C6)
Between the second inductance (L2) and the 5th resistance (R5), the other end exports rectified signal to signal processing circuit；Third capacitance
(C3) one end is connected to the base stage of triode (V2), and the other end is connected between the second inductance (L2) and the 5th resistance (R5)；The
The one end two capacitances (C2) is connected to the base stage of triode (V2), the other end be connected to the first inductance (L1) and the 4th resistance (R4) it
Between.
Furthermore, signal processing circuit includes that RC filter circuits, AC regeneration amplifying circuit and floating comparison are electric
Road.
Furthermore, the floating comparison circuit includes comparator (N2), eleventh resistor (R11) and the 11st electricity
Hold (C11).
The invention also discloses a kind of wireless transmission and receiving remote control equipments, include as described in above-mentioned technical proposal
Digital coding wireless transmission and receiving device and executing agency, the executing agency receive digital coding wireless transmission and receiving dress
Decoded signal is set to control controlled object.
The beneficial effects of the utility model are as follows：The digital coding wireless transmission and receiving device of the utility model uses
High antinoise cmos digital coding, the HT-12E/HT-12D designs of decoding large scale integrated circuit, it is the good confidentiality of signal, reliable
Property high, strong antijamming capability；Receiving circuit is designed using superregenerative, and receiving sensitivity is high；Known by " floating type " comparison circuit
Level signal, noise resisting ability are strong；Overall circuit design is simple, at low cost, small.It is anti-interference to overcome conventional wireless remote controler
The shortcomings of poor, mutual crosstalk, the technology have been supplied in transfer robot, unmanned aerial vehicle command remote control, and experiment effect is stablized.
Description of the drawings
Fig. 1 is the wireless transmission and receiving remote control equipment system block diagram of the utility model embodiment one.
Fig. 2 is that the digital coding of the utility model embodiment one sends schematic diagram.
Fig. 3 is the digital coding record principle figure of the utility model embodiment one.
Fig. 4 is the Digital Logic expression figure of the utility model embodiment one.
Fig. 5 is the transmission digital clocking signal figure of the utility model embodiment one.
Fig. 6 is the HT-12E transmission data flow charts of the utility model embodiment one.
Fig. 7 is that the HT-12D of the utility model embodiment one receives data flowchart.
Fig. 8 is the digital coding radio transmitter schematic diagram of the utility model embodiment one.
Fig. 9 is the digital coding wireless receiving circuit schematic diagram of the utility model embodiment one.
Label in figure：1- digital coding modules, 2- wireless transmitter modules, 3- wireless receiving modules, 4- signal processing moulds
Block, 5- digital decoding modules.
Specific implementation mode
It is described in further detail with reference to embodiment and with reference to attached drawing to the utility model.
Embodiment one：
One embodiment of the utility model is a kind of wireless transmission and receiving remote control equipment.
Referring to Fig.1, the wireless transmission and receiving remote control equipment, including digital coding wireless transmission and reception device and execution
Mechanism, wherein digital coding wireless transmission and reception device are made of emitting portion, receiving portion.Executing agency receives number and compiles
The code decoded signal of wireless transmission and receiving device controls controlled object.
Emitting portion includes mainly coding circuit and radiating circuit.Coding circuit by switch control, operator by switch,
Coding circuit is set to generate required control instruction.These control instructions be have certain features, each other it is easily distinguishable
Electric signal, such as：Different control instructions is represented with the sinusoidal signal of different frequency, it is also possible to which different numbers represents different
Control instruction.In addition to this, different control instructions can be also represented with different phases, pulse amplitude, width etc..Coding
The control instruction signal that circuit generates all is the lower electric signal of frequency, can not be transferred directly to remote-control target up, will also
Control instruction signal is sent to radiating circuit, so that it is loaded on high-frequency signal (carrier wave), could be sent by transmitting antenna.Transmitting
The main function of circuit is to generate carrier wave, command signal is modulated on carrier wave, emitted antenna sends modulated carrier.
Receiving portion is mainly made of receiving circuit, signal processing circuit and decoding circuit.It is received by reception antenna micro-
Weak signal is sent to decoding circuit after the selection of high frequency section and signal enhanced processing.Decoded signal is supplied to execution machine
Structure, to realize the control to controlled object.
In the present embodiment, the coding of control instruction signal, decoding use the high big rule of antinoise cmos digital coding/decoding
Vlsi die HT-12E/HT-12D has 8 bit address coding, 4 data.Referring to Fig. 2 and Fig. 3, in HT-12E/HT-12D
Number A0-A7 be address coding combination, D0-D3 is data-signal, and TE is send button, and ROSC is clock oscillator.
Data are transmitted with serial form, and " 8 bit address " and " 4 data " constitutes a word signal, and first 8 are addresses, and rear 4
Position is data, often primary by TE, effectively sends 4 word signals.When continuously transmit 4 word signals and receive verify effective 3 times when,
Output circuit just works.That is, when transmitting terminal is consistent with receiving terminal address, receiving terminal D0-D3 just has output data.This
Kind data transfer mode, has many advantages, such as strong anti-interference performance, secrecy effect is good, and it is anti-interference to overcome conventional wireless remote controler
The shortcomings of poor, mutual crosstalk.
Referring to Fig. 4, in digital coding logical one by 2 clock cycle low level and the high level structure of 1 clock cycle
At；Logical zero is made of the low level of 1 clock cycle and the high level of 2 clock cycle.This logical expressions mode, than
Traditional (high level " 1 ", low level " 0 ") indicates there is higher anti-interference ability.
Referring to Fig. 5, transmission digital clocking signal is serial form, and transmitting terminal send button is effectively primary, is automatically continuously sent out
Send 4 word signals；Receiving terminal often receives 1 word signal, compares whether address is consistent first, then stores 4 data again, otherwise
It abandons；When 3 secondary word signal checkings are identical, 4 data of storage are just calculated effectively, and output circuit just works.
The detailed operation flow that the number of HT-12E is sent is referring to Fig. 6.The detailed operation flow of the digital received of HT-12D
Referring to Fig. 7.
Specifically, the digital coding wireless transmission in Fig. 8 is respectively adopted in coding circuit and radiating circuit in the present embodiment
Circuit is realized by digital coding module, wireless transmitter module.Wherein, big using high antinoise CMOS codings in digital coding module
Scale integrated circuit HT-12E carries out digital coding.The addresses A0-A7 in HT-12E encode (a0-a7) using 8 bit address, D0-
D3 is 4 input datas (d0-d3), and TE is send button (low level is effective), and ROSC is clock oscillator.Sending signal
In sequential, a word is formed by 12 Digital sums, first eight bits are address (a0-a7), and latter four are data (d0-d3).When the low electricity of TE
When flat effective, the encoded signal of 4 words is continuously exported from OUT terminal.
Referring to Fig. 8, digital coding module includes power filtering capacitor C13, button K1, the integrated circuit HT- of digital coding
12E, indicator light V3, resistance R13, R14, R15, triode V4.R15 is collector load resistor, and R14 is base stage input resistance.+
After the filtered capacitance C13 of 12V power supplys, the VCC of button K1, indicator light V3 accesses HT-12E are passed sequentially through.The anode of indicator light V3
It is connected with the base stage of triode V4 through base stage input resistance R14.The both ends of resistance R13 are connected with 15,16 feet of HT-12E respectively.
The both ends of collector load resistor R15 are connected with the anode of the collector of triode V4, indicator light V3 respectively.
Referring to Fig. 8, when button K1 is pressed, circuit power is connected, and the 18 foot VCC of HT-12E obtain power supply, indicator light at this time
V3 is bright, and triode V4 saturation conductions make the 14 foot TE of HT-12E be low level, and the 17 foot OUT terminals of encoded signal from HT-12E are continuous
Export 4 words；Meanwhile wireless transmitter module obtains voltage, by carrier wave by encoded signal modulate emission.K1 is often pressed once, from
It is dynamic to continuously transmit 4 alphanumeric codes, remaining time entire circuit not power consumption, especially suitable for being sent out using battery powered telecommand
Send device, circuit power consumption minimum；Using 12 bit digital assembly codings of HT-12E (8 bit address, 4 bit digitals), security performance is good；Profit
With 4 word sending functions of HT-12E one-time continuous, make that system rejection to disturbance ability is strong, reliability is high.
Referring to Fig. 8, wireless transmitter module is designed using time-devision system amplitude keying high frequency transmission circuit.The OUT of HT-12E is defeated
Go out the base stage that signal accesses V5 after the input resistance R16 of triode V5.Radiating circuit carrier wave is made of C14, C15, L4, V5
LC oscillating circuits form, and generate 300MHz high_frequency sine waves.C15 is in parallel with L4, a termination isolation inductance L3, another termination V5's
Collector.C14 mono- terminates L3, the base stage of another termination V5.L3 mono- terminates the anode of V3, and a termination C14 and C15 prevents high frequency
Signal flows to power supply, while providing DC channel to V5.Frequency of oscillation can be changed in trimming capacitor C 15, and L4 directly uses the copper of pcb board
Film designs, and as built-in transmitting antenna, wireless transmission EFFECTIVE RANGE is not less than 500 meters.Overall circuit design letter
It is single, it is at low cost, it is small.
In the present embodiment, receiving circuit, signal processing circuit and decoding circuit specifically use the wireless receiving mould in Fig. 9
Block, signal processing module, digital decoding module are realized.
Wherein, wireless receiving module be superregenerative high frequency receiving circuit design, including reception antenna, capacitance C1, resistance R1,
R2, R3, diode V1 and by triode V2, capacitance C2, C4, inductance L1, capacitance C5, C3, inductance L2, resistance R5, R4 and electricity
Hold the superregenerative high frequency receiving circuit of C6 compositions.One end of resistance R1 is connected through resistance R2 with the base stage of triode V2, resistance R1
The other end be connected with one end of resistance R4, the other end of resistance R4 is connected to inductance L1；One end of resistance R3 is connected to three poles
The base stage of pipe V2, the other end are connected to the anode of diode V1；Coupled capacitor C1 mono- terminates reception antenna input terminal, and the other end connects
It is connected on the base stage of triode V2；Resistance R1, R2, R3 determine that the operating point of triode V2, diode V1 make the base stage of triode V2
Voltage clamping stablizes the operating point of V2 in 0.7V or more；Capacitance C5 mono- terminates the collector of triode V2, another termination triode
The emitter of V2 plays positive feedback effect；Inductance L1 mono- terminates the collector of triode V2, and the other end is through resistance R4 and signal processing
Circuit is connected；Capacitance C4 is in parallel with inductance L1, is trimmer, it is synchronous with tranmitting frequency that adjusting C4 can change receives frequency；
The one end inductance L2 is connected with the emitter of V2, and the other end is connected with resistance R5, to constitute filter circuit, the other end connection of R5
To the cathode of V1, the one end capacitance C6 is connected between L2 and R5, and the other end exports rectified signal to signal processing circuit；Capacitance C3
One end is connected to the base stage of V2, and the other end is connected between L2 and R5；The one end capacitance C2 is connected to the base stage of V2, other end connection
Between inductance L1 and R4.When antenna receives modulated signal, it is coupled to V2 amplifications, detection through C1, this detecting circuit is set
In respect of very high sensitivity.
In signal processing module, RC filter circuits are constituted by C8, C7 and R7, stable electricity is provided for wireless receiving module
Source.In order to improve system interference ability, the rectified signal drawn from C6 is filtered through R6, C9, send the amplifier electricity formed to N1, N2
Road amplification differentiates, shaping.Wherein, N1 and R10 constitutes an AC regeneration amplifying circuit, and R8 and R9 partial pressures determine the same phases of N1
The DC level at end, C10 are filter capacitor；N2, R11, C11 constitute comparison circuit, and benchmark current potential is filled by R11, C11
Electric discharge determines, floats with the variation of input signal, is a kind of " floating type " comparison circuit, is conducive to that noise signal electricity is isolated
Pressure, effect are to improve the reliability of signal discriminating.
Digital decoding is carried out using high antinoise CMOS decoding large scale integrated circuits HT-12D in digital decoding module.Letter
The ends IN of the signal access HT-12D of number processing module output.The filtered capacitance C12 of+5V power supplys is accessed after filtering out power supply ripple
The ends VCC of HT-12D.In the sequential for receiving signal, a word is formed by 12 Digital sums, first eight bits are address (a0-a7), after
Four are data (d0-d3), when continuously receiving 4 word signals, and are received 3 times when verifying effective, data (d0-d3) latch defeated
Go out, while VT exports high level.Digital decoding is carried out using HT-12D, security performance is good, and it is anti-to overcome conventional wireless remote controler
The shortcomings of interfering poor, mutual crosstalk.
Digit code radio remote controller given by the present embodiment is that digital coding, decoding technique and conventional wireless electricity are sent out
Penetrate the combination of reception.Radiating circuit one-time continuous sends 4 word signals, and 3 verifications of receiving circuit are effective, just export number
According to reliability is high.
Although the utility model has been described by way of example and in terms of the preferred embodiments, embodiment is not for limiting the utility model
's.In the spirit and scope for not departing from the utility model, it is new to also belong to this practicality for any equivalent change or retouch done
The protection domain of type.Therefore the scope of protection of the utility model should be mark with the content that claims hereof is defined
It is accurate.
Claims (10)
1. a kind of digital coding wireless transmission and receiving device, which is characterized in that including emitting portion and receiving portion, wherein sending out
It includes coding circuit and radiating circuit to penetrate part, and the coding circuit uses HT-12E integrated circuits, and coding electricity is controlled by switch
Road generates required control instruction signal；The radiating circuit is for generating carrier wave, by control instruction signal modulation in carrier wave
On, emitted antenna sends brewed carrier wave；Receiving portion includes receiving circuit, signal processing circuit and decoding electricity
Selection of the reception antenna received signal through high frequency section is carried out signal amplification by road, the receiving circuit through signal processing circuit
Decoding circuit is sent to after processing, the decoding circuit carries out signal decoding using HT-12D integrated circuits.
2. digital coding wireless transmission and receiving device according to claim 1, it is characterised in that：What coding circuit generated
Logical one is made of the low level of 2 clock cycle and the high level of 1 clock cycle in digital coding；Logical zero is by 1
The high level of the low level of clock cycle and 2 clock cycle are constituted.
3. digital coding wireless transmission and receiving device according to claim 2, it is characterised in that：The control instruction letter
Number a word signal is constituted by 8 bit address and 4 data, first 8 are addresses, and latter 4 are data.
4. digital coding wireless transmission and receiving device according to claim 3, it is characterised in that：The coding circuit is every
4 word signals of secondary effective transmission.
5. digital coding wireless transmission and receiving device according to claim 2, it is characterised in that：The radiating circuit is adopted
With time-devision system amplitude keying high frequency transmission circuit, including LC oscillating circuits, the first inductance (L3) and input resistance (R16), institute
It states LC oscillating circuits to be made of the first capacitance (C14), trimmer (C15), the second inductance (L4) and triode (V5), HT-
The output signal of 12E accesses the base stage of triode (V5) after the input resistance (R16) of triode (V5)；Trimmer (C15)
It is in parallel with the second inductance (L4), and trimmer (C15) one terminates the first inductance (L3), the current collection of another termination triode (V5)
Pole；First capacitance (C14) one terminates the first inductance (L3), the base stage of another termination triode (V5)；The one end first inductance (L3)
Mains side, first capacitance of termination (C14) and trimmer (C15) are connect, prevents high-frequency signal from flowing to power supply, while giving triode
(V5) DC channel is provided；Trimmer (C15) is for changing frequency of oscillation, the copper film of the second inductance (L4) use pcb board
It is made, as built-in transmitting antenna；The emitter of triode (V5) is grounded.
6. digital coding wireless transmission and receiving device according to claim 2, it is characterised in that：Receiving circuit is using super
Regenerate high frequency receiving circuit.
7. digital coding wireless transmission and receiving device according to claim 6, it is characterised in that：The receiving circuit packet
Include reception antenna, the first capacitance (C1), first resistor (R1), second resistance (R2), 3rd resistor (R3), diode (V1) and
Superregenerative high frequency receiving circuit, the superregenerative high frequency receiving circuit is by triode (V2), the second capacitance (C2), the 4th capacitance
(C4), the first inductance (L1), the 5th capacitance (C5), third capacitance (C3), the second inductance (L2), the 5th resistance (R5), the 4th electricity
Hinder (R4) and the 6th capacitance (C6) composition；Base stage of the one end of first resistor (R1) through second resistance (R2) Yu triode (V2)
It is connected, the other end of first resistor (R1) is connected with one end of the 4th resistance (R4), and the other end of the 4th resistance (R4) is connected to
First inductance (L1)；One end of 3rd resistor (R3) is connected to the base stage of triode (V2), and the other end is connected to diode (V1)
Anode；First capacitance (C1) one terminates reception antenna input terminal, and the other end is connected to the base stage of triode (V2)；First resistor
(R1), second resistance (R2), 3rd resistor (R3) determine that the operating point of triode (V2), diode (V1) make triode (V2)
Base voltage clamper stablizes the operating point of triode (V2) in 0.7V or more；5th capacitance (C5) one terminates triode (V2)
Collector, the emitter of another termination triode (V2), plays positive feedback effect；First inductance (L1) one terminates triode (V2)
Collector, the other end are connected through the 4th resistance (R4) with signal processing circuit；4th capacitance (C4) is in parallel with the first inductance (L1),
For trimmer, it is synchronous with tranmitting frequency that the 4th capacitance (C4) of adjusting can change receives frequency；Second inductance one end (L2) with
The emitter of triode (V2) is connected, and the other end and the 5th resistance (R5), which are connected, constitutes filter circuit, the 5th resistance (R5) it is another
One end is connected to the cathode of diode (V1), the 6th one end capacitance (C6) be connected to the second inductance (L2) and the 5th resistance (R5) it
Between, the other end exports rectified signal to signal processing circuit；The one end third capacitance (C3) is connected to the base stage of triode (V2), separately
One end is connected between the second inductance (L2) and the 5th resistance (R5)；The one end second capacitance (C2) is connected to the base of triode (V2)
Pole, the other end are connected between the first inductance (L1) and the 4th resistance (R4).
8. digital coding wireless transmission and receiving device according to claim 2, it is characterised in that：Signal processing circuit packet
Include RC filter circuits, AC regeneration amplifying circuit and floating comparison circuit.
9. digital coding wireless transmission and receiving device according to claim 8, it is characterised in that：The floating comparison is electric
Road includes comparator (N2), eleventh resistor (R11) and the 11st capacitance (C11).
10. a kind of wireless transmission and receiving remote control equipment, which is characterized in that include the number as described in claim 1~9 is any
Wireless transmission and receiving device and executing agency are encoded, the executing agency receives digital coding wireless transmission and receiving device solution
Signal after code controls controlled object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820690128.9U CN208079073U (en) | 2018-05-10 | 2018-05-10 | Digital coding wireless transmission and receiving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820690128.9U CN208079073U (en) | 2018-05-10 | 2018-05-10 | Digital coding wireless transmission and receiving device |
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| Publication Number | Publication Date |
|---|---|
| CN208079073U true CN208079073U (en) | 2018-11-09 |
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ID=64045614
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|---|---|---|---|
| CN201820690128.9U Expired - Fee Related CN208079073U (en) | 2018-05-10 | 2018-05-10 | Digital coding wireless transmission and receiving device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117052380A (en) * | 2023-10-10 | 2023-11-14 | 四川宏大安全技术服务有限公司 | Wireless pressure measurement device and method |
-
2018
- 2018-05-10 CN CN201820690128.9U patent/CN208079073U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117052380A (en) * | 2023-10-10 | 2023-11-14 | 四川宏大安全技术服务有限公司 | Wireless pressure measurement device and method |
| CN117052380B (en) * | 2023-10-10 | 2024-01-02 | 四川宏大安全技术服务有限公司 | Wireless pressure measurement device and method |
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