CN206340130U - Multifunction wireless baby monitor - Google Patents

Abstract

The utility model discloses a kind of multifunction wireless baby monitor, including signal collector and monitoring terminal and wireless communication system；Wireless communication system is wireless duplex communication module, wireless radio transmission module in described monitoring terminal side is provided with the heartbeat signal transmitter module of the heartbeat signal of timing transmitting setting power, the power detection module for the described heartbeat signal power that detection is received is provided with described signal collector side wireless receiving module, the wireless radio transmission module of described signal collector includes power conditioning module, the transmission power of the wireless radio transmission module of signal collector described in the power setting for the heartbeat signal that described power conditioning module is detected according to described power detection module.In the utility model by way of minimum transmission power transmitting is determined receiving signal attenuation situation, strong antijamming capability while radiation can be reduced to greatest extent.

Description

Multifunction wireless baby monitor

Technical field

The utility model is related to safety custody field, particularly a kind of old man, patient and baby for can't take care of oneself Child carries out the multifunction wireless baby monitor of safety custody.

Background technology

Baby monitor（Baby Monitor）Belong to wireless family security protection system, by care device（Also referred to as baby End）And display（Also referred to as father and mother end）Two parts constitute, place care device in the room of baby, you can with by display with When monitoring to baby safety.Baby monitor is as a kind of home-use security product, and this product utilization guards end to baby Every act and every move every word and action real-time monitoring is provided, the radio wave that the result of monitoring passes through analog signal or data signal It is sent in the control end equipment of guardian on hand, and to be reduced into video or audio.By using baby monitor, father and mother Or guardian no longer needs to wait for keeping close and although it is understood that their behavior by the side of in baby or child, and different Reason condition can be discovered and be handled while appearance immediately.Baby's monitor is not only the optimal daily life shield of infant Manage articles for use or look after old man and the indispensable good assistant of patient.

China Patent Publication No. CN2781473Y disclose a kind of child kick quilt and Smoke Detection wireless nursing device, The device includes：One signal inductor, it, which is comprised at least, has a heat sensor, a battery and one can launch signal in Beijing The infrared emitting gone.One signal transceiver, it, which is comprised at least, the infrared receiver for receiving signal inductor, a photographic mirror The wireless launcher that the data that head and a signal that can receive infrared receiver are shot with phtographic lens are launched.One Monitor, in addition to it can be used to display picture, there is a radio that radio wave is sent to receive signal transceiver to connect for it Receive device and loudspeaker.This child kicks quilt and the wireless nursing device of Smoke Detection is a kind of typical safety custody system, it Signal inductor can be arranged on by with caregiver such as infant and the old man and patient that can't take care of oneself, an amount is seen The block sound can occur at once in addition to broadcasting pictures at any time, also and notify that caregiver is handled for shield person's situation occurred, the monitor, with up to To being protected by caregiver is healthy and safe, and caregiver can also enjoy effect of rest to the full.

But the radio communication device between signal transceiver and monitor uses 2.4GHz wireless technologys at present, This is a kind of short range wireless transmission technology, is used for increasing income.2.4GHz refers to a working frequency range, 2.4GHz ISM （Industry Science Medicine）It is that the whole world discloses the general radio band used, is worked under 2.4GHz frequency ranges Bigger use scope and stronger antijamming capability can be obtained, with the development of wireless communication technique, skill that 2.4GHz is wireless Art is now widely used for the personal safety custody device such as baby monitor, although the baby monitor designed with 2.4GHz using DSP（Digital signal processor）Technology.But there is problems with：(1) transmission power is big, it is high to radiate, and transmitting is to baby for a long time Have a certain impact.(2) communication distance is short, less than 300 meters, limits application.In addition, there is problems that (1) is adopted With CTCSS or DCS code encoding/decoding modes, password is easily analysed, confidentiality is poor.(2) circuit is complicated, and component is more, production cost and event Barrier rate is high.(3) single-simplex operation pattern can only be used, big according to half-duplex mode of operation technical difficulty, cost is very high.(4) work( Can be simple, it is difficult to meet high-end customer needs.(5) frequency is few, is vulnerable to mobile phone and other communication apparatus are disturbed.(6) volume Greatly.

The content of the invention

The utility model be in order to overcome above prior art exist shortcoming and propose, its technical problem solved It is to provide a kind of strong antijamming capability, sound clarity, the Multi-function monitor for infants of long transmission distance.

The technical solution of the utility model is：A kind of multifunction wireless baby monitor, including be arranged on by guardianship Channel radio between the signal collector at place and the monitoring terminal and signal collector and monitoring terminal that are arranged at guardian Letter system；Described wireless communication system includes the less radio-frequency for being separately positioned on signal collector side and monitoring terminal side The wireless duplex communication module of transmitter module and wireless receiving module composition, the less radio-frequency in described monitoring terminal side is sent out Penetrate the heartbeat signal transmitter module that module is provided with the heartbeat signal of timing transmitting setting power, described signal collector side The power detection module for the described heartbeat signal that detection is received, described signal collector are provided with wireless receiving module Wireless radio transmission module include power conditioning module, described power conditioning module is according to described power detection module The transmission power of the wireless radio transmission module of signal collector described in the power setting of the heartbeat signal detected.

, can be most in the utility model by way of minimum transmission power transmitting is determined receiving signal attenuation situation Strong antijamming capability while reducing to limits radiation.

Further, in described multifunction wireless baby monitor：It is additionally provided with described signal collector side The memory of the signal of collected guardianship, the wireless radio transmission module of described signal collector is a kind of interval Formula transmitter.Described signal collector includes audio collection processing module, temperature detecting module, smog alarm detection module With monitored target breathing detection module.Described audio collection processing module includes microphone, preamplifier, programmable filter Ripple device, voice A/D converter, microphone are collected into the sound by guardianship and its environment, amplify by preamplifier After be input to programmable filter and be filtered, then be converted into by voice A/D converter being temporarily stored into storage after data signal In device；The multiplication factor of described preamplifier is selected by audio level register.Described temperature detecting module includes Temperature sensor and temperature data processing unit, described temperature sensor include thermistor, temperature data processing unit bag The resistance detecting circuit of the described thermistor resistance of measurement in real time is included, with measuring resistance resistance value ratio to calculating real time temperature Counting circuit, the real time temperature data of described counting circuit output are temporarily stored into memory.Described monitored target breathing Detection module includes the breathing plate of detection monitored target breathing state, and the A/D converter being connected with breathing plate output, A/D turns The data relevant with monitored target breathing state of parallel operation output are temporarily stored into memory.Described smog alarm detection module Including Smoke Sensor, the smoke data processing module handled the Real-time Smoke depth data that Smoke Sensor is exported, When smokescope reaches the alarm module of setting value alarm, described alarm module includes the wireless of trigger signal collector and penetrated The trigger module for launching smog alarm information immediately with peak power of frequency transmitter module, be arranged on monitoring terminal side works as receipts The alarm alarmed during to smog alarm information.

The utility model additionally provides a kind of multifunction wireless baby monitoring system, including at least at two by guardianship Place one group of signal collector and be arranged on guardian side monitoring terminal and each signal collector and monitoring terminal it Between wireless communication system；Described wireless communication system is time-division/frequency division between each signal collector and monitoring terminal Multiplexing wireless communication system.

Baby monitoring system of the monitoring terminal to multiple signal collectors, each signal collector and monitoring can be realized Time-division/frequency division multiplexing radio communication system between terminal.Described monitoring terminal includes at least two timesharing alternately to all Signal collector broadcast in the minds of signal terminal.

Below with reference to drawings and Examples, the utility model is described in detail.

Brief description of the drawings

Fig. 1 is the multifunction wireless baby monitor structured flowchart of the utility model embodiment 1.

Fig. 2 is the utility model embodiment multifunction wireless baby monitor assembly circuit schematic diagram.

Fig. 3 is the utility model embodiment multifunction wireless baby monitor radio frequency amplifying circuit figure.

Fig. 4 is the utility model embodiment multifunction wireless baby monitor rf chip schematic diagram.

Fig. 5 is the utility model embodiment multifunction wireless baby monitor audio amplifier circuit figure.

Fig. 6 is the utility model embodiment multifunction wireless baby monitor DSP chip concept figure.

Fig. 7 is the utility model embodiment multifunction wireless baby monitor temperature sensing circuit and smog alarm detection electricity Lu Tu.

Fig. 8 is the utility model embodiment multifunction wireless baby monitor baby's breathing detection circuit diagram.

Fig. 9 is that schematic diagram is shown in the wireless baby monitor point to multi--point communication of the utility model multifunction wireless.

Embodiment

Embodiment 1, the present embodiment is the multifunction wireless that the special population of processing guarded that can not be lived to baby etc. Baby monitor, using this monitor, guardian can leave by guardianship in short-term, such as mother of baby can be in baby During sleep, baby is left in short-term to go nearby to do some things of oneself, and the situation of baby sleep is collected using signal collector, Baby is rapidly returned to when baby needs at one's side.Due to being that the wireless communication system used will be sent after the situation collection of baby To at guardian, therefore, guaranteeing correctly to be sent to field condition at guardian outside, in addition it is also necessary to less radio-frequency The power of emitter is the smaller the better, because power is smaller, radiates smaller.

In the present embodiment, the method for use is to send setting power heartbeat from monitoring terminal to signal collector using reception Signal, at signal collector end by detecting the power of heartbeat signal, determines the decay of channel, then, with the nothing of monitoring terminal I.e. the minimum receiving power of line receiver module resolution ratio sends detection signal plus the power of decay.

As shown in figure 1, in the present embodiment, multifunction wireless baby monitor, including it is arranged on the signal collection at baby Wireless communication system between device and the monitoring terminal and signal collector and monitoring terminal that are arranged at guardian；Specifically , signal collector can be a wearable device, and it is dressed by baby, and monitoring terminal can be a kind of mobile terminal, special It is not a kind of at present using extensive smart mobile phone, and wireless communication system can use Bluetooth communication system.

Wireless communication system includes the wireless radio transmission for being separately positioned on signal collector side and monitoring terminal side The wireless duplex communication module of module and wireless receiving module composition, the wireless radio transmission module in monitoring terminal side is set Have in the heartbeat signal transmitter module of the heartbeat signal of timing transmitting setting power, signal collector side wireless receiving module and set The power detection module for the heartbeat signal that detection is received is equipped with, the wireless radio transmission module of signal collector includes power Adjustment module, the nothing of the power setting signal collector for the heartbeat signal that power conditioning module is detected according to power detection module The transmission power of line radiofrequency emitting module.

In the present embodiment, the transmitting work(of the wireless radio transmission module of the Bluetooth communication system of signal collector is used Rate can be set as three shelves, such as 13dBm, 16dBm and 20dBm third gear, and the less radio-frequency of the Bluetooth communication system of mobile phone Transmitter module uses 20dBm, the resolution ratio of the wireless receiving module of the Bluetooth communication system of mobile phone when launching heartbeat signal It is assumed to be 1dBm, the power for the heartbeat signal that signal collector is received is 15dBm, then the decay for illustrating channel is 5dBm, then The transmission power of the wireless radio transmission module of the Bluetooth communication system of signal collector is more than 6dBm, therefore, it can choosing Select this grade of transmitting of 13dBm.When the power for the heartbeat signal that signal collector is received is 3dBm, then illustrating the decay of channel is 17dBm, then the transmission power of the wireless radio transmission module of the Bluetooth communication system of signal collector be more than 18dBm, because This, can select this grade of transmitting of 20dBm.When the power for the heartbeat signal that signal collector is received is 7dBm, then illustrate channel Decay be 13dBm, then the transmission power of the wireless radio transmission module of the Bluetooth communication system of signal collector be more than 14dBm , it is thereby possible to select 16dBm this shelves transmittings.One grade of minimum power is selected in a word, and radiation is minimum.When signal collector not When can receive heartbeat signal, represent that the distance between guardian and baby exceed sphere of action, signal collector is not also to mobile phone Sending signal.

In the present embodiment, in order to more reduce influence of the radiation to baby, signal collector side is additionally provided with collected The memory of the signal of the guardianship arrived, the wireless radio transmission module of signal collector is a kind of batch (-type) transmitter.This Sample, the wireless radio transmission module of the Bluetooth communication system of signal collector can be stored with the reality of long period in memory When situation after just launch, it is possible to reduce radiated time.

Signal collector include a PCB printed circuit board (PCB) and shell, panel etc., PCB printed circuit board (PCB)s as shown in Fig. 2 Circuit on PCB printed circuit board (PCB)s includes radio frequency amplifying circuit, DSP and audio amplifier circuit, temperature Detect circuit, smog alarm detection circuit and baby's breathing detection circuit.

As shown in Figure 3,4, the radio frequency amplifying circuit at two ends is identical in the present embodiment, is all bluetooth wireless transmitter module, bag Include rf chip TW3321, transmitting-receiving conversion chip, low pass filter.Micro-control unit MCU is received after audio digital signals Caching is packaged into, is just launched when full 20 bags by rf chip, rf chip control transmits/receives switching switch Middle emission switch closure, radiofrequency signal is filtered HFS and launched by low pass filter.Rf chip TW3321 Operating voltage is 1.9-3.6V, internal power amplifier, wake up timer, digital modems, the transmission of 64 bytes and Data FIFO and configurable GPIO is received, required outer member is 1 20MHz when in use crystal and C5, C6, C7 Electric capacity, L3, L4, L5 inductance, R2 resistance constitute a highly reliable emission system, and one is constituted with C8, C9 electric capacity and L7 inductance Highly reliable reception system.Design is simple, and low cost.When baud rate is 2kbps, receiving sensitivity reaches -117dBm.When When baud rate is 70kbps, receiving sensitivity reaches -102dBm.Splendid link-quality can be provided, expanding communication context Power consumption is minimized simultaneously.Minimum filtering bandwidth reaches 8KHz, with splendid frequency selectivity, and being not added with power in frequency range puts Peak power output during big device is up to 20dBm.When baud rate is 2kbps, farthest transmission range is up to 2KM.Work as baud rate During for 70kbps, farthest reliability voice communication distance is up to more than 600 meters.

Audio collection processing module includes microphone, preamplifier, programmable filter, voice A/D converter, wheat Gram wind is collected into the sound by guardianship and its environment, and programmable filter progress is input to after preamplifier amplifies Filtering, then be converted into by voice A/D converter being temporarily stored into memory after data signal；The multiplication factor of preamplifier Selected by audio level register.As shown in figure 5, audio collection processing module includes microphone preamplifier, may be programmed Audio coder ＆ decoder (codec), the audio-frequency amplifier of wave filter, audio amplitude adjustment register and voice analog/digital conversion and D/A.Voice Signal is inputted, by chip by microphone input by Differential Input mode to phonetic codec chip MIC+ and MIC- Preamplifier is put to be amplified voice signal.The multiplication factor of amplifier can be selected by audio level register, then Audio signal is filtered by programmable filter.Then voice signal is compressed, converts analog signals into digital letter Number, from TX DT port transmissions vocoded datas to micro-control unit MCU.In mobile phone terminal, micro-control unit MCU receives radio frequency mould The speech data of block input, by RX, DT mouthfuls enter chip decompression, convert digital signals into analog signal.By programmable Wave filter is filtered to audio signal, and the multiplication factor of amplifier is selected by audio level register.Audio signal is from AF OUT port is exported, and signal is amplified by audio-frequency amplifier, and is exported from loudspeaker.

As shown in fig. 6, audio coder ＆ decoder (codec) is TW3326 above, microphone preamplifier is included inside TW3326, can Program wave filter, audio amplitude adjustment register and voice analog/digital conversion and D/A.Audio coder ＆ decoder (codec) TW3326 has complete Duplexing codec functions, low-power consumption low with the bit error rate, operating current 1.9mA.The element has the Working mould that user can configure Formula and algorithm, therefore optimal transfer rate and speech quality can be selected according to concrete application.It is provided from 16~128kbps's Sample frequency, sampling clock can select to be provided or internal generation by outside.The digital scrambler being internally integrated can be to a certain degree The security of upper enhancing communication, and the probability that irregular continuous " 1 " or " 0 " occurs is reduced, and speech detector can then be used To support the saving of power supply power consumption.

Temperature detecting module includes temperature sensor and temperature data processing unit, and temperature sensor includes thermistor, Temperature data processing unit includes the resistance detecting circuit of the described thermistor resistance of measurement in real time, with measuring resistance resistance value ratio Counting circuit to calculating real time temperature, the real time temperature data of counting circuit output are temporarily stored into memory.Such as Fig. 7 institutes Show, resistance T1 values change, P5.0 mouthfuls of micro-control unit MCU with baby's variation of ambient temperature is detected in temperature sensor Read-out voltage value, calculates resistance T1 resistance value.Compared with measuring resistance T1 values, calculate baby's environment temperature；Work as smog When alarm detects baby's environment and has certain density smog, by wireless launcher BT-100, sent out with 433MHz frequencies Go out alarm signal.When mobile phone receives 433MHz radiofrequency signals, HFS, input to radio frequency mould are filtered by low pass filter Block is amplified.Signal, when it is smog alarm signal that micro-control unit MCU, which is detected, is led to by SDN mouthfuls of outputs of radio-frequency module Cross Mobile phone horn and send alarm.

When wishing that baby end is in without radio-frequency radiation state, selected by receiver button.Now receive LCD liquid crystal Display, which is shown in radiationless pointing character and transmitting LCD liquid crystal displays, shows radiationless character；Receiver receives smog report During alert signal, receive LCD liquid crystal displays and show smog alarm pointing character；When receiver stand-by state, baby it is quiet or Receiver LCD liquid crystal displays display content is sleep pattern during sleep state, the receiver LCD liquid when baby is noisy or cries and screams Crystal display alternately shows cry and scream pattern and painful pattern；Simultaneously mobile telephone display have 7 grades of change characters of reception sound size, Reception environment temperature is shown, receiver vibration prompt, the low electricity of battery and charged state instruction, the regulation of loudspeaker sound magnitude show work( Energy.Transmitting LCD liquid crystal displays display content includes radiationless pointing character, pairing character, 6 grades of emitter sound controling sensitivity can Adjust character, 6 grades of adjustable characters of horn volume.

Smog alarm detection module includes Smoke Sensor, and the Real-time Smoke depth data that Smoke Sensor is exported is carried out The smoke data processing module of processing, when smokescope reaches the alarm module of setting value alarm, described alarm module bag The trigger module for launching smog alarm information immediately with peak power of the wireless radio transmission module of trigger signal collector is included, It is arranged on the alarm alarmed when receiving smog alarm information of monitoring terminal side.As shown in figure 8, baby's breathing inspection Part is surveyed using accurately AD conversion, wireless baby's breathing plate is amplified to the tiny signal of breathing sensing, and AD is then used again Conversion is judged.By detect AD values different range saltus step come judge breathing different conditions.Wireless baby's breathing plate By adjusting the power output of emitter, the distance of communication is flexibly set.Transmission power when plate work is breathed due to baby is non- It is often low, thus say that the electromagnetic radiation produced is also minimum.Wireless breathing plate is as can be with Real-time and Dynamic Detection sleeping condition of baby A kind of instrument, it has also become quite ace-high product in baby's monitor.

When in a receiver and three emitters one matched when, when a receiver and three emitters simultaneously During work, receiver is circulated work in 30 seconds -30 seconds -30 seconds according to every emitter is received.When a receiver and three Platform emitter works simultaneously when, receiver is circulated work in 30 seconds -30 seconds -30 seconds according to every emitter is received.So Twins and multiparity's Communication can effectively be solved.

Using power automatic control technology, and the electromagnetic field intensity that can be listened to according to emitter receiving terminal and self adaptation Ground adjusts the transmit power of APRS launch terminals（That is adjust automatically radiation intensity）.Reduce to greatest extent wireless baby to reach The potential impact that the wireless radiation signal of monitor is likely to result in baby user.

Problem above is solved using multifunction wireless baby monitor very well, its power output is low（Less than 25mW）, communication Distance is remote（More than 600 meters）.Its unique outlook, it is deep to be liked by user all over the world.Current designing technique reaches water advanced in the world Flat, this machine is that the first in the world platform is designed with 800MHz, and using DSP technologies, communication distance is more than 600 meters of machines.

In addition, signal collector eventually can also be by the way of multi-to-multi with monitoring, this mode is used for endowment monitoring Signal collector is installed in mechanism, such as multiple retirement homes, the respective real-time condition in old man's house can be collected, it is such as each Body temperature, heart rate of old man etc., and the dividing line such as smell in room are outwards launched, and are also that a kind of broadcast mode is sent, each service The mobile phone of personnel or special purpose intelligent terminal all have received these information, equally, the smart mobile phone of each attendant or It is also a kind of mode of broadcast, different intelligence that other special intelligent terminals send heartbeat signal to all signal collectors Mobile phone sends heartbeat signal different at the time of.

Claims (7)

1. a kind of multifunction wireless baby monitor, including be arranged on the signal collector at by guardianship and be arranged on monitoring The wireless communication system between monitoring terminal and signal collector and monitoring terminal at person；It is characterized in that：Described nothing Line communication system includes the wireless radio transmission module for being separately positioned on signal collector side and monitoring terminal side and wireless The wireless duplex communication module of receiver module composition, the wireless radio transmission module in described monitoring terminal side is provided with fixed When transmitting setting power heartbeat signal heartbeat signal transmitter module, in described signal collector side wireless receiving module It is provided with the power detection module of described heartbeat signal that detection is received, the wireless radio transmission of described signal collector Module includes power conditioning module, and the heartbeat that described power conditioning module is detected according to described power detection module is believed Number power setting described in signal collector wireless radio transmission module transmission power.

2. multifunction wireless baby monitor according to claim 1, it is characterised in that：In described signal collector one Side is additionally provided with the memory of the signal of collected guardianship, the wireless radio transmission module of described signal collector It is a kind of batch (-type) transmitter.

3. multifunction wireless baby monitor according to claim 2, it is characterised in that：Wrapped in described signal collector Include audio collection processing module, temperature detecting module, smog alarm detection module and monitored target breathing detection module.

4. multifunction wireless baby monitor according to claim 3, it is characterised in that：Described audio collection processing mould Block includes microphone, preamplifier, programmable filter, voice A/D converter, microphone be collected into by guardianship and The sound of its environment, after preamplifier amplifies being input to programmable filter is filtered, then passes through voice analog and turn Parallel operation is converted into being temporarily stored into memory after data signal；The multiplication factor of described preamplifier is by audio level register To select.

5. multifunction wireless baby monitor according to claim 3, it is characterised in that：Described temperature detecting module bag Temperature sensor and temperature data processing unit are included, described temperature sensor includes thermistor, temperature data processing unit Include the resistance detecting circuit of the described thermistor resistance of measurement in real time, with measuring resistance resistance value ratio to calculating real time temperature Counting circuit, the real time temperature data of described counting circuit output are temporarily stored into memory.

6. multifunction wireless baby monitor according to claim 3, it is characterised in that：Described monitored target breathing Detection module includes the breathing plate of detection monitored target breathing state, and the A/D converter being connected with breathing plate output, A/D turns The data relevant with monitored target breathing state of parallel operation output are temporarily stored into memory.

7. multifunction wireless baby monitor according to claim 3, it is characterised in that：Described smog alarm detection mould Block includes Smoke Sensor, and the smoke data handled the Real-time Smoke depth data that Smoke Sensor is exported handles mould Block, when smokescope reaches the alarm module of setting value alarm, described alarm module includes the nothing of trigger signal collector The trigger module for launching smog alarm information immediately with peak power of line radiofrequency emitting module, is arranged on monitoring terminal side The alarm alarmed when receiving smog alarm information.