WO2016155038A1 - 在设定区域内定位无线胎儿监护探头的方法及装置 - Google Patents

在设定区域内定位无线胎儿监护探头的方法及装置 Download PDF

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Publication number
WO2016155038A1
WO2016155038A1 PCT/CN2015/076643 CN2015076643W WO2016155038A1 WO 2016155038 A1 WO2016155038 A1 WO 2016155038A1 CN 2015076643 W CN2015076643 W CN 2015076643W WO 2016155038 A1 WO2016155038 A1 WO 2016155038A1
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Prior art keywords
base station
wireless
monitoring probe
fetal monitoring
signal strength
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PCT/CN2015/076643
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English (en)
French (fr)
Inventor
唐林
陈德伟
尹新
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深圳市理邦精密仪器股份有限公司
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Application filed by 深圳市理邦精密仪器股份有限公司 filed Critical 深圳市理邦精密仪器股份有限公司
Priority to US15/038,468 priority Critical patent/US9931100B2/en
Priority to EP15843094.2A priority patent/EP3097858B1/en
Publication of WO2016155038A1 publication Critical patent/WO2016155038A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/42—Details of probe positioning or probe attachment to the patient
    • A61B8/4245—Details of probe positioning or probe attachment to the patient involving determining the position of the probe, e.g. with respect to an external reference frame or to the patient
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0252—Radio frequency fingerprinting
    • G01S5/02521—Radio frequency fingerprinting using a radio-map
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A61B5/0004—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A61B5/0004—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
    • A61B5/0006—ECG or EEG signals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A61B5/0004—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
    • A61B5/0011—Foetal or obstetric data
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A61B5/0015—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by features of the telemetry system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2209/00—Arrangements in telecontrol or telemetry systems
    • H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture

Definitions

  • the present invention relates to medical devices and, more particularly, to a method and apparatus for positioning a wireless fetal monitoring probe within a set area.
  • the central monitoring system consisting of a traditional fetal monitor and multiple fetal monitors is a wired probe.
  • One monitoring probe includes two fetal heart probes and one contraction pressure probe. Because the connection cable of the wired probe is very long, it is not easy to lose, but in the one-to-one monitoring, a monitor is placed next to each pregnant woman, the probe is tied to the pregnant woman's stomach, and 3 probes and 3 lines are easily wrapped around together. Moreover, pregnant women are not free to move around. They must also take off the probe when they leave the fetal monitor. They need to be brought back again. It is very inconvenient to use. In this case, a fetal monitor is required next to each bed, and a single ward may have multiple monitors.
  • Group probes (1 set of probes include: 2 fetal heart probes and 1 contraction probe) or more sets of probes, displaying multiple windows on a large screen display, each window corresponding to a pregnant woman, so in a ward
  • Doctors and nurses can observe all pregnant women's situation through large-screen display and increase work efficiency. They can also use a fetal monitor at each bed, each equipped with a set of wireless fetal monitoring probes (one set of probes included) : 2 fetal heart probes and 1 uterine contraction probe.
  • wireless fetal monitoring probes have several problems in clinical use in hospitals: wireless fetal monitoring probes are easily lost because there is no cable to "tie" the probes on the machine, and a single probe is small and easily lost. And it is not easy to find; at the same time, pregnant women can be moved around when they are attached to the wireless fetal monitoring probe.
  • the technical problem to be solved by the present invention is that the above-mentioned wireless fetal monitoring probe of the prior art cannot locate, is inconvenient to find a user, and the data may be lost, and provides a position for positioning the wireless fetal monitoring probe, and is convenient for finding a user.
  • the technical solution adopted by the present invention to solve the technical problem is to construct a method for positioning a wireless fetal monitoring probe in a set area, comprising the following steps:
  • the data management center sends a command by a plurality of wireless base stations set in different locations in the set area, and requires the wireless fetal monitoring probe within its scope to transmit the received base station signal strength data table;
  • the method further comprises the following steps:
  • N dividing the set area into a plurality of positioning areas, each positioning area is set with a reference point; obtaining signal strengths of the plurality of reference base stations, and quantifying them to obtain a reference point base station signal strength data table and storage.
  • the quantification in the step B) or the step N) includes:
  • Obtaining a signal strength value of the wireless base station that can be received as a signal strength value of the base station, and indicating a signal strength value of the wireless base station that cannot be received is represented by zero;
  • the number of the line base stations is arranged in the order of the corresponding wireless fetal monitoring probe or the signal strength value of the point, and the base station signal strength data table or the reference point base station signal strength data table at the point is obtained.
  • all the signal levels of the wireless base stations that can be received need to be greater than the set signal level, and if not, the radio base station is adjusted or the wireless base station is increased to satisfy.
  • the method further includes the following steps:
  • the method further includes the following steps:
  • the data management center issues a probe vocalization command with a wireless fetal monitoring probe identification number, such that the wireless fetal monitoring probe that receives the instruction and whose identification number matches is driven to sound the buzzer.
  • the method further includes the following steps:
  • the wireless fetal monitoring probe cannot receive the signal of any wireless base station, the physiological data obtained by the wireless fetal monitoring probe and the current state data and time data of the wireless fetal monitoring probe are stored inside the wireless fetal monitoring probe; when the wireless fetal monitoring probe can When receiving the radio base station signal, the stored data is transmitted to the data management center through the radio base station.
  • the data management center issues an instruction through the wireless base station to which it is connected or the wireless base station attached thereto to search for or interact with the wireless fetal monitoring probe.
  • the method further includes a mobile terminal that downloads and displays current wireless fetal monitoring probe position data by the data management center through a wireless base station; and the mobile terminal enters when it finds that the existing wireless fetal monitoring probe disappears
  • the search mode transmits the same electromagnetic wave as the wireless base station signal and displays the wireless fetal monitoring probe response information to find the wireless fetal monitoring probe.
  • the invention also relates to an apparatus for implementing the above method, comprising:
  • Positioning command issuing unit for causing the data management center to send commands through a plurality of wireless base stations set in different positions in the set area, requesting wireless fetal monitoring within its scope of action
  • the probe transmits a base station signal strength data table received by the probe;
  • the base station signal strength data table forming unit is similar to the wireless fetal monitoring probe that receives the command to search all base station signals that it can receive, and the received base station signals are intensity-quantized to form a base station signal arranged according to the base station number.
  • a strength data table which is sent to the data management center by a base station having the highest received signal strength;
  • Positioning unit a current base station signal strength data table sent to the received wireless fetal monitoring probe and a reference point base station signal strength data table obtained in advance and including base station signal strengths of the plurality of reference points in the set area Performing an operation to obtain a distance reference table indicating a distance between the location of the wireless fetal monitoring probe and each reference point; selecting a reference point in which the distance value is the smallest as the current location of the wireless fetal monitoring probe.
  • the storage unit is configured to: when the wireless fetal monitoring probe cannot receive the signal of any wireless base station, store the physiological data obtained by the wireless fetal monitoring probe and the current state data and time data of the wireless fetal monitoring probe inside the wireless fetal monitoring probe; When the wireless fetal monitoring probe is capable of receiving the wireless base station signal, the stored data is sent to the data management center through the wireless base station;
  • Location Marking Unit Used to mark the current location of all wireless fetal monitoring probes on a previously formed map.
  • the method and apparatus for positioning a wireless fetal monitoring probe in a set area have the following beneficial effects: because the wireless fetal monitoring probe detects the current position of the wireless fetal monitoring probe for a plurality of wireless base stations set at different positions, and simultaneously Comparing these signal strength values with the signal strength of the reference point position obtained in advance, the position of each wireless fetal monitoring probe can be quickly determined; meanwhile, when the wireless fetal monitoring probe cannot receive the wireless base station signal, it is physiologically acquired.
  • the parameters and status data of the wireless fetal monitoring probe are stored, and the stored data is transmitted to the data management center after the wireless fetal monitoring probe is restored to the wireless base station, so that the monitoring data is not lost.
  • FIG. 1 is a flow chart of a method and apparatus for positioning a wireless fetal monitoring probe in a set region according to the present invention
  • FIG. 3 is a flow chart of obtaining a distance list of a wireless fetal monitoring probe in an embodiment of the present invention
  • FIG. 4 is a flow chart of searching for a position of a wireless fetal monitoring probe through a wireless terminal in an embodiment of the present invention
  • Fig. 5 is a schematic structural view of a device in an embodiment of the present invention.
  • a method of positioning a wireless fetal monitoring probe in a set area is constructed, including the following steps:
  • Step S11 sends a command by the plurality of wireless base stations in the set area, and each wireless fetal monitoring probe is required to detect the received wireless base station signal strength: in the present invention, the plurality of wireless fetal monitoring probes, the plurality of wireless base stations, and the at least one data
  • the management center is set up in the set area (usually the hospital's maternity ward and its affiliated areas) to form a monitoring network.
  • the plurality of wireless fetal monitoring probes are connected to the data management center by one or more of the wireless base stations, and the data management center receives, analyzes, and stores the physiological data of the user transmitted by the wireless fetal monitoring probe. Achieve monitoring of the user's fetus and store these monitoring data.
  • the data management center can also issue commands through the wireless base station to enable the wireless fetal monitoring probes within the range of the wireless base stations to perform specified actions, such as sending special data or beeping. Since the above data management center is a computer with a specific software under normal circumstances, the data management center can also display the positioned wireless fetal monitoring probe on the map of the display screen for the doctor or nurse to view. As for how to set up these wireless base stations and how to divide the set area, it will be described in detail later. In this step, the data management center sends an instruction by a plurality of wireless base stations set in different locations in the set area, and requests the wireless fetal monitoring probe within the scope of the transmission to send the received base station signal strength data table;
  • Step S12 Each base station detects the signal strength of the wireless base station that can be received, converts it into a signal level, forms a current base station signal list, and sends it to the data management center:
  • the wireless fetal monitoring probe in the range of the wireless base station receives the command from the wireless base station
  • the plurality of wireless fetal monitoring probes respectively search for all base station signals that can be received (the wireless base station signals include multiple wireless base stations) Signal
  • the base station signal received by the base station is subjected to intensity quantization to form a base station signal strength data table arranged according to the base station number, and the base station signal strength data table is sent to the data management by a base station having the highest received signal strength Center; it is worth mentioning that each wireless fetal monitoring probe in the set area will send out such a data sheet to the data management center.
  • the wireless fetal monitoring probe searches for all base stations that can receive the signal; for example, the number of base stations capable of receiving the signal strength of a wireless fetal monitoring probe If i, i is less than or equal to the total number of wireless base stations set in the set area, the i radio base stations (APs) having signals record actual signal strength values (r values), and the other mi AP records have r values of 0, which is obtained.
  • the radio base station signal strength data table r [rAP1, ..., rAPm] at the location of the wireless fetal monitoring probe, which is sent to the data management center by a radio base station having the highest signal strength.
  • Step S13 calculates the current base station signal list of each wireless fetal monitoring probe and the previously obtained reference point base station signal list, and obtains the distance between the wireless fetal monitoring probe and the preset reference point, and selects the one with the smallest distance value as the minimum distance value.
  • Current position of the wireless fetal monitoring probe In this step, the data management center processes the wireless base station signal strength data table transmitted by each wireless fetal monitoring probe received by the data management center, and respectively refers to each reference point.
  • the point base station signal strength data table (which is stored in the data management center whose acquisition or formation process will be described later) is computed to determine the location of the wireless fetal monitoring probe.
  • the current base station signal strength data table sent by the received wireless fetal monitoring probe and the previously obtained base station signal strength including multiple reference points in the set area The reference point base station signal strength data table is operated (each reference point is operated once), and a distance reference table indicating the distance between the position of the wireless fetal monitoring probe and each reference point is obtained; selecting a reference point having the smallest distance value as the current one
  • the location of the wireless fetal monitoring probe the base station signal strength and the base station signal reference strength received by the wireless fetal monitoring probe can be determined by various methods to obtain the location of the probe and each base station.
  • the distance between the base stations can be, for example, a weighted distance inversion method, a kriging method, or an Euclidean distance method.
  • the Euclidean distance method is relatively simple to implement compared with the previous two methods, and because it is implemented in a special area of the hospital, the database will not be too large.
  • the previous two schemes have many empirical parameters and interpolation calculations, and the accuracy is not as good as the Euclidean distance method. . Therefore, in the present embodiment, the Euclidean distance method is taken as an example to describe the acquisition of the above distance or the establishment of a database. Perform the following operations on the current wireless base station signal strength data table and the reference point signal strength data table sent by a wireless fetal monitoring probe:
  • m is the number of all wireless base stations in the set area
  • i is the number of wireless base stations that the wireless fetal monitoring probe can receive its signal
  • r AP is the signal strength data sent by the wireless fetal monitoring probe
  • R AP is the signal strength value of the jth radio base station in the reference point signal strength data table
  • the current radio base station signal strength list of a radio fetal monitoring probe passes through i
  • the reference point signal strength list of the reference points performs the above operation to obtain i distance values, forming a current distance reference table of the wireless fetal monitoring probe, and selecting one of the minimum distance values as the current position of the probe.
  • Step S14 indicates the position of the wireless fetal monitoring probe: In this step, the position of the obtained wireless fetal monitoring probe is indicated on the map indicating the setting area, and the source of the map will be described in detail later.
  • the wireless fetal monitoring probe can establish a connection with at least one of the wireless base stations, and transmit the obtained physiological data to the data management center through the wireless base station, and can also receive the wireless base station. , instructions from the data management center.
  • the shape of the setting area of each hospital is different, and the location and number of setting the wireless base station are also different, and are not static.
  • the setting of the above-mentioned wireless base station and the division of the set area are still regular.
  • the radio base station settings of each set area include the following steps as shown in FIG. 2:
  • Step S21 setting a plurality of wireless base stations in a plurality of different positions in the set area: in this step, setting a plurality of wireless base stations at different positions in the set area; setting positions of the wireless base stations are capable of The signal covers the area and maintains a certain signal strength. It is worth mentioning that there is no clear limit between this step and step S22. In many cases, this step may be performed, and then step S22 is performed. When the situation is found or the obtained data does not meet the requirements, the step is returned again. Then step S22 is performed, and such an iteration may be performed many times until more satisfactory data is obtained. However, if the setting is completed, the setting of the wireless base station will not be changed during the positioning or monitoring process for at least a period of time.
  • Step S22 divides the set area into a plurality of identification areas, and sets a reference point in each of the identification areas to obtain a signal strength of each wireless base station at the reference point: in this step, the set area is divided into multiple positions. a region, each of the positioning regions is provided with a reference point; and the base station signal strengths of the plurality of reference stations are obtained.
  • Step S23 obtains a reference point base station signal list for each reference point:
  • the reference point base station signal strength data tables of each reference point are sequentially obtained and stored separately.
  • the radio base station when the radio base station is set and the positioning area is divided and the positioning area is divided, there is no particularly strict sequence, as long as the required reference point base station signal strength data table can be obtained.
  • the "base station layout and detection range map" of the wireless fetal monitoring probe network can be established according to the hospital layout; the building floor plan of the floor where the network needs to be installed is first obtained in the hospital, the various departments and layouts are understood, and the drawing is simplified by drawing tools.
  • a "base station layout and detection range map” which can visually see the distribution of the layer (set area) is formed; the base station is arranged according to the floor structure of the set area, and is recorded as m APs, labeled as AP1 to APm.
  • the monitoring probe tests the base station signal strength R, for example, from low to high 1 to 9 levels: in the process of arranging the base station, the base station signal strength is tested by the wireless fetal monitoring probe, and the signal strength is set from low to high 1 to 9 levels. To ensure good communication, at least 3 levels of signal strength are required, so test the signal strength wherever the wireless fetal monitoring probe is needed. If the signal is too bad, increase the position of a base station or mobile base station until m.
  • the "identification area” is divided into N according to, for example, 1.5 square meters, and is marked as area 1 to area n; Any point of ⁇ n), usually the center point of the area, marked as reference point Si (S1 ⁇ Sn): get n reference points Si (S1 ⁇ Sn); put a wireless fetal monitoring probe has been selected On the Si, the probe scans the signal strength R of the surrounding AP, and transmits the data to the calculation processing unit to store the acquired data; in the obtained data, there is a strong signal.
  • the signal of the base station is represented by the strength of the received signal; for the signal of the wireless base station that cannot be received, Zero representation; then, according to the number sequence of the wireless base station, the corresponding signal level of the point is arranged to obtain a signal strength data table or a reference point signal strength data table of the point.
  • the identification of the base station signal since the signals transmitted by the base station carry the identification code indicating the identity of the base station, there is no problem of unrecognizable. These identification codes are already present on the wireless base station when the wireless base station is shipped, for example, a hardware identification code equivalent to the hardware address of the network.
  • the above-mentioned wireless fetal monitoring probe also has such an identification code, and when the wireless fetal monitoring probe sends any signal, it carries its identification code, so that the data management center or the wireless base station can Clearly identify the source of these signals.
  • the data management center processes the plurality of signal strength data tables sent from the plurality of wireless fetal monitoring probes respectively to determine the position of each probe. How many wireless fetal monitoring probes send the signal strength data table to the data management center, how many times such data processing is performed.
  • Figure 3 For a wireless fetal monitoring probe, the specific processing or operation process is shown in Figure 3, including:
  • Step S31 obtains a reference point signal strength list of a reference point: In this step, a reference point signal strength list of a reference point is obtained. These reference point signal strength lists are obtained by measurement in advance as described above.
  • Step S32 calculating the data in the reference point signal strength list and the data in the current wireless base station signal strength list transmitted by the wireless fetal monitoring probe according to a formula, and obtaining a distance value between the wireless fetal monitoring probe and the reference point: In the step, follow the formula Calculating the reference point signal strength list of the reference point and the data in the current radio base station signal strength list sent by the wireless fetal monitoring probe to obtain a distance parameter between the probe and the reference point.
  • Step S33 repeats the above steps for all reference points to obtain the distance value of the wireless fetal monitoring probe to all reference points, and selects the smallest distance as the current position of the wireless fetal monitoring probe: steps S31 and S32 obtain the probe to a wireless base station.
  • the distance but in the present invention, there are a total of n reference points, so the above steps need to be repeated n times, traversing the reference point base station signal strength data table of all reference points, obtaining n such distance values, selecting the smallest value One (ie, the nearest one of the wireless fetal monitoring probes from the identification area reference point) serves as the location of the wireless fetal monitoring probe.
  • the data management center receives the number of wireless base station signal strengths sent by the wireless fetal monitoring probes, and how many times the above steps S31-S33 are repeated to determine the position of each probe.
  • the monitoring data cannot be transmitted to the data management center for processing and archiving through the wireless base station.
  • the physiological data obtained by the probe and the current state data and time data of the wireless fetal monitoring probe are stored inside the wireless fetal monitoring probe; when the wireless fetal monitoring probe can receive the wireless base station signal At this time, the stored data is transmitted to the data management center through the wireless base station.
  • the data management center issues an instruction through the wireless base station to which it is connected or the wireless base station attached thereto to search for or interact with the wireless fetal monitoring probe. That is, in the present invention, in addition to the data management center, the plurality of wireless base stations, and the wireless fetal monitoring probe, a mobile terminal may be included, and the mobile terminal may be connected to the system through any one of the wireless base stations to download the data management center.
  • the data of the reference point base station signal strength list, the map, the division of the identification area, and the like may also download the location information of the current wireless fetal monitoring probe identified or determined by the data management center.
  • the above mobile terminal can be regarded as a simplified version of a mobile data management center.
  • the mobile terminal is a mobile computer device, such as a notebook computer or an IPAD, that can be carried by an operator and capable of transmitting a wireless base station signal and connecting to a wireless base station.
  • Step S41 initializes the mobile terminal, obtains the area division of the data management center, the reference point signal strength list and the like data through the wireless base station: in this step, the mobile terminal initializes and obtains data required for the work by the data management center; the wireless terminal initializes and searches The wireless network sent by the base station: after the wireless terminal is started, the software initializes to find the base station signal, if there is a signal, connects to the base station, accesses the wireless network, and communicates with the computing processing unit of the base station; and downloads the data management center of the network.
  • the base station layout and detection range map "data and update, for example, data can be updated every minute.
  • Step S42 Obtaining the current wireless fetal monitoring probe position: In this step, all wireless fetal monitoring probe position information is downloaded from the data management center and saved in the MCU of the mobile terminal; meanwhile, all the wireless fetal monitoring probes are also downloaded from the data management center. Alarm event information is saved in the MCU of the mobile terminal; if there is an alarm signal, the mobile terminal drives its buzzer to sound and display the alarm information when needed; similarly, it can also be displayed on the screen of the mobile terminal. "Base station layout and detection range map" and marked no Line fetal monitoring probe position and alarm symbol.
  • step S43 the wireless fetal monitoring probe disappears, and if so, step S44 is performed; otherwise, the process returns to step S43.
  • Step S44 The wireless terminal turns on the search mode, sends out the same electromagnetic wave as the wireless base station, and starts searching for the disappearing wireless fetal monitoring probe: In this step, the mobile terminal enters the search mode, emits electromagnetic waves, and searches under the carrying of the medical staff.
  • the mobile terminal is configured to search for an existing wireless fetal monitoring probe when it moves out of the set area, obtain monitoring data of the probe during loss of contact with the wireless base station, and upload it to a data management center, etc. Wait.
  • the wireless terminal is an important component of the system, and it is mainly carried by the medical staff. That is to say, as long as the mobile terminal is equivalent to a mobile simplified "computing processing unit" in the wireless network composed of the base station, functions such as alarm and display are realized, and the position of the wireless fetal monitoring probe and related alarm events can be viewed on the mobile terminal.
  • Another important function of the mobile terminal and data management center is to record and save the activity track and tracking search function of the pregnant woman. In this way, the location information of the wireless fetal monitoring probe is detected in real time in both the data management center and the mobile terminal. When the information is recorded in chronological order, the trajectory information of the wireless fetal monitoring probe is formed.
  • the mobile terminal can initiate a search or search function, and neither the base station nor the wireless terminal can detect the wireless fetal monitoring probe.
  • the mobile terminal automatically enables the search or search function, and the mobile terminal controls the internal RF module to send the same signal as the base station, and searches according to the stored information of the wireless fetal monitoring probe that is not detected.
  • This function is to change the mobile terminal. It is a mobile "base station" for searching wireless fetal monitoring probes, establishing wireless connections and communications for the purpose of finding a wireless fetal monitoring probe. At this time, the mobile terminal acts as a mobile base station, and immediately issues an instruction to request a connection.
  • the medical staff takes the wireless terminal to look inside the hospital, and enters the lost wireless fetal monitoring probe t (and the pregnant woman tied together) at a certain distance, wireless
  • the fetal monitoring probe appears in the range of the signal circle of the mobile terminal (ie, the range of the mobile terminal), that is, it can be recognized.
  • the display of the wireless fetal monitoring probe is weak on the display screen of the terminal, in the circle "The top, while the mobile terminal is applied to its buzzer with an interval of 8 s at 8 kHz
  • the pulse group makes it sound; if the medical staff takes the wireless terminal to move in the opposite direction, the wireless fetal monitoring probe signal will weaken and disappear, and the "circle" will no longer appear on the display, the buzzer will stop sounding; then the medical staff needs Moving in the opposite direction, the wireless fetal monitoring probe signal will gradually become stronger.
  • the display screen of the mobile terminal shows that the wireless fetal monitoring probe signal intensity is enhanced, and the radius of the "circle” is reduced at the top of the "circle", and the terminal is simultaneously
  • the buzzer emits an 8 kHz pulse group with an interval shortened to 2 s, that is, the mobile terminal gradually reduces the radius of the "circle” according to the signal strength of the wireless fetal monitoring probe, reducing the interval of the pulse group, and when the probe is found, the "circle” It becomes a "point", and the buzzer of the mobile terminal emits a sound without a gap.
  • the mobile terminal downloads all the data from the wireless fetal monitoring probe.
  • the wireless fetal monitoring probe uses the wireless terminal as the base station, transmits the data, and cancels the wireless signal loss alarm of the wireless fetal monitoring probe; when the medical staff and the pregnant woman After returning to the coverage of the wireless network, the wireless fetal monitoring probe communicates with the wireless terminal and the base station, and the data of the wireless fetal monitoring probe is sent to the data management center through the base station, that is, at this time, the data management center cancels the wireless wireless fetal monitoring probe.
  • the signal loss alarm "and downloads the mobile terminal history data.
  • the wireless terminal sends the stored wireless fetal monitoring probe data to the calculation processing unit, and the calculation processing unit cancels the “wireless fetal monitoring probe wireless signal loss alarm”, and simultaneously connects the data with the data in the pregnant woman database according to the time scale to ensure that the data is not Lost.
  • the data management center can also be used to better manage unused wireless fetal monitoring probes, for example, a vacant probe alarm function, for notifying medical personnel to charge the mobile probe in time to prevent wireless fetal monitoring when used.
  • the probe has no power.
  • the data management unit searches all the wireless fetal monitoring probes in real time, and detects the state of the wireless fetal monitoring probe, and finds that the state is non-charging state; meanwhile, the monitoring of the wireless fetal monitoring probe is not detected within a period of time.
  • the wireless ultrasound probe cannot detect the fetal heart rate value, and the wireless contraction pressure probe cannot detect the contraction pressure value for 10 minutes, indicating that the wireless fetal monitoring probe is vacant and not used;
  • the data management center is in the "base station layout and The detection range map displays all vacant wireless fetal monitoring probe positions and is marked red: reminds the user to put the wireless fetal monitoring probe back on the charging stand; At the same time, these buzzers that do not use the wireless fetal monitoring probe can be audible, prompting the medical staff to come over and handle the wireless fetal monitoring probe.
  • the present invention further relates to an apparatus for implementing the foregoing method, including: a positioning instruction issuing unit 51, a base station signal strength data table forming unit 52, a positioning unit 53, a reference point base station signal strength data table forming unit 54, The storage unit 55 and the position indicating unit 56.
  • the positioning command issuing unit 51 is configured to enable the data management center to send an instruction through a plurality of wireless base stations set in different locations in the set area, and request the wireless fetal monitoring probe in the range thereof to transmit the received base station signal strength data table.
  • the base station signal strength data table forming unit 52 searches for all the base station signals that can be received by the wireless fetal monitoring probe that receives the command, and the base station signals received by the base station are subjected to intensity quantization to form a base station arranged according to the base station number.
  • the positioning unit 53 is configured to obtain a current base station signal strength data table and received in advance from the received wireless fetal monitoring probe Calculating a reference point base station signal strength data table including base station signal strengths of the plurality of reference points in the set area, and obtaining a distance reference table indicating a distance between the location of the wireless fetal monitoring probe and each reference point; The reference point with the smallest distance value is the current wireless tire a location of the monitoring probe; the reference point base station signal strength data table forming unit 54 is configured to divide the set area into a plurality of positioning areas, each positioning area is provided with a reference point; and the plurality of reference base stations are obtained The signal strength is quantized to obtain a reference point base station signal strength data table and stored; the storage unit 55 is configured to acquire physiological data and the wireless fetal monitoring probe when the wireless fetal monitoring probe cannot receive the signal of any wireless base station The current state data and the time data are stored inside the
  • the positioning unit 53 further includes a distance reference table forming module (not shown in FIG. 5) for performing the following calculations:
  • a distance reference table wherein m is the number of all wireless base stations in the set area, i is the number of reference points, r AP is the jth wireless base station in the signal strength data table sent by the wireless fetal monitoring probe The signal level value, R AP is the signal level value of the jth wireless base station in the reference point signal strength data table; the current wireless base station signal strength list of a wireless fetal monitoring probe passes the reference point signal strength respectively with the i reference points The list performs the above operation to obtain i distance values to form a distance reference table. It is worth mentioning that in the present invention, when the different calculation methods are selected, the operations performed by the distance reference table forming module may be different, but eventually the distance reference table is obtained.

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Abstract

本发明涉及一种在设定区域内定位无线胎儿监护探头的方法，包括如下步骤：通过多个无线基站发送指令，要求其作用范围内的无线探头发送其基站信号强度数据表；无线探头搜索所有其能够接收到的基站信号，形成按照基站编号排列的基站信号强度数据表，发送到所述数据管理中心；将接收到的当前基站信号强度数据表和参考点基站信号强度数据表进行运算，得到距离参考表；选择其中距离值最小的一个作为当前该探头的所在位置。本发明还涉及一种实现上述方法的装置。实施本发明的在设定区域内定位无线胎儿监护探头的方法及装置，具有以下有益效果：能够快速确定每个无线探头的所在位置、使得监控数据不会丢失。

Description

在设定区域内定位无线胎儿监护探头的方法及装置 技术领域
本发明涉及医疗设备，更具体地说，涉及一种在设定区域内定位无线胎儿监护探头的方法及装置。
背景技术
传统的胎儿监护仪和多台胎儿监护仪组成的中央监护系统都是有线探头，一个监护探头包括2个胎心探头以及1个宫缩压力探头。由于有线探头的连接线缆很长，不容易丢失，但在一对一的监护时，每个孕妇旁边都放置一台监护仪，探头绑在孕妇肚子上，3个探头3条线容易缠绕在一起。而且孕妇无法自由走动，离开胎儿监护仪还必须摘下探头，回来还需要重新带上，使用很不方便。在这种情况下，中每个床位旁都需要一台胎儿监护仪，一个病房可能设置有多个监护仪。不仅使用设备的数量较多，占用科室面积及耗电多；同时，在数据的管理上也比较困难。在现有的医用无线胎儿监护探头的使用变得越来越多的情况下，为解决上述问题，通常会采取多床位的胎儿监护仪，其主要原理是在一台监护仪上，挂载4组探头(1组探头包括了：2个胎心探头和1个宫缩探头)或更多组探头，在一个大屏的显示器上显示多个窗口，每个窗口对应一个孕妇，这样在一个病房内就只有一台胎儿监护仪，而且探头使用无线胎儿监护探头，系统简洁，占地少，同时功耗也少于多台胎儿监护仪的功耗总和。医生护士可以通过大屏显示器即可观察所有孕妇的情况，增加工作效率；也可以在每个病床边用一台胎儿监护仪，每个仪器配一组无线胎儿监护探头(1组探头包括了：2个胎心探头和1个宫缩探头)，通过这种方法减少线材，孕妇绑上探头后可以自由移动。但是，就目前而言，无线胎儿监护探头在医院临床使用中存在几个问题：无线胎儿监护探头容易丢失，因为没有线缆把探头″绑″在机器上，单独一个探头很小，容易丢失，且不容易寻找；同时，孕妇绑上无线胎儿监护探头后，可以随意走动，医生护士想找她时(如医护人员发现胎心率偏低，胎儿监护仪报警，想对孕妇进行检查时)发现孕妇不在病房，无法快速找到孕妇位置；在孕妇没有通知医护人员，戴着无线胎儿监护探头走出妇产科无线产 网范围(如到医院的小花园休息等意外情况)，胎心数据不能及时传回，发生报警事件也不知道，医护人员很难找到该孕妇，就算之后找到了，这段时间的监护数据和发生的报警事件也不得而知。
发明内容
本发明要解决的技术问题在于，针对现有技术的上述无线胎儿监护探头不能定位、不便于寻找使用者、数据可能丢失的缺陷，提供一种能够定位无线胎儿监护探头的位置、便于寻找使用者、数据不会丢失的在设定区域内定位无线胎儿监护探头的方法及装置。
本发明解决其技术问题所采用的技术方案是：构造一种在设定区域内定位无线胎儿监护探头的方法，包括如下步骤：
A)数据管理中心通过设置在设定区域内不同位置的多个无线基站发送指令，要求其作用范围内的无线胎儿监护探头发送其接收到的基站信号强度数据表；
B)收到所述指令的无线胎儿监护探头搜索所有其能够接收到的基站信号，将其接收到的基站信号经过强度量化后形成按照基站编号排列的基站信号强度数据表，将其通过接收到的信号强度最大的一个基站发送到所述数据管理中心；
C)对接收到的无线胎儿监护探头发送来的当前基站信号强度数据表和事先取得的、包括所述设定区域中多个参考点的基站信号强度的参考点基站信号强度数据表进行运算，得到表示所述无线胎儿监护探头所在位置与各参考点距离的距离参考表；选择其中距离值最小的一个参考点作为当前该无线胎儿监护探头的所在位置。
更进一步地，所述步骤A)之前还包括如下步骤：
M)在所述设定区域内的不同位置分别设置多个无线基站；
N)将所述设定区域划分为多个定位区域，每个定位区域设置一个参考点；取得所述多个参考定上的基站信号强度，将其量化，得到参考点基站信号强度数据表并存储。
更进一步地，所述步骤B)或步骤N)中的量化包括：
取得能够接收到的无线基站的信号强度值作为该基站的信号强度值，对于不能接收到的无线基站的信号强度值以零表示；按照无 线基站的编号顺序排列其对应的该无线胎儿监护探头或该点的信号强度值，得到该点的基站信号强度数据表或参考点基站信号强度数据表。
更进一步地，参考点信号强度数据表中，所有能够接收到的无线基站的信号等级均需大于设定的信号等级，如不能满足，通过调节所述无线基站位置或增加无线基站使其满足。
更进一步地，还包括如下步骤：
D)在事先形成的地图上标记所有无线胎儿监护探头的当前位置。
更进一步地，还包括如下步骤：
所述数据管理中心发出带有无线胎儿监护探头身份识别号码的探头发声指令，使得接收到该指令的、其身份识别号码匹配的无线胎儿监护探头驱动其上的蜂鸣器发声。
更进一步地，还包括如下步骤：
当无线胎儿监护探头不能接收到任何无线基站的信号时，将其取得的生理数据和该无线胎儿监护探头当前的状态数据以及时间数据存储在所述无线胎儿监护探头内部；当无线胎儿监护探头能够接收无线基站信号时，将上述存储的数据通过该无线基站发送到数据管理中心。
更进一步地，所述数据管理中心通过其连接的无线基站或其自身附带的无线基站发出指令，查找无线胎儿监护探头或与其进行数据交互。
更进一步地，还包括移动终端，所述移动终端通过无线基站由所述数据管理中心下载当前无线胎儿监护探头位置数据并显示；所述移动终端在发现现有的无线胎儿监护探头消失时，进入搜寻模式，发出与无线基站信号相同的电磁波，并显示该无线胎儿监护探头应答信息以查找该无线胎儿监护探头。
本发明还涉及一种实现上述方法的装置，包括：
定位指令发出单元：用于使数据管理中心通过设置在设定区域内不同位置的多个无线基站发送指令，要求其作用范围内的无线胎儿监 护探头发送其接收到的基站信号强度数据表；
基站信号强度数据表形成单元：同于使收到所述指令的无线胎儿监护探头搜索所有其能够接收到的基站信号，将其接收到的基站信号经过强度量化后形成按照基站编号排列的基站信号强度数据表，将其通过接收到的信号强度最大的一个基站发送到所述数据管理中心；
定位单元：用于对接收到的无线胎儿监护探头发送来的当前基站信号强度数据表和事先取得的、包括所述设定区域中多个参考点的基站信号强度的参考点基站信号强度数据表进行运算，得到表示所述无线胎儿监护探头所在位置与各参考点距离的距离参考表；选择其中距离值最小的一个参考点作为当前该无线胎儿监护探头的所在位置。
更进一步地，还包括：
存储单元：用于当无线胎儿监护探头不能接收到任何无线基站的信号时，将其取得的生理数据和该无线胎儿监护探头当前的状态数据以及时间数据存储在所述无线胎儿监护探头内部；当无线胎儿监护探头能够接收无线基站信号时，将上述存储的数据通过该无线基站发送到数据管理中心；
位置标示单元：用于在事先形成的地图上标记所有无线胎儿监护探头的当前位置。
实施本发明的在设定区域内定位无线胎儿监护探头的方法及装置，具有以下有益效果：由于使得无线胎儿监护探头检测其当前所在位置对于多个设置在不同位置的无线基站的信号强度，同时，将这些信号强度值与事先得到的参考点位置的信号强度比较，能够快速确定每个无线胎儿监护探头的所在位置；同时，在无线胎儿监护探头不能接收到无线基站信号时，将其取得生理参数及该无线胎儿监护探头的状态数据存储，并在该无线胎儿监护探头恢复与无线基站的连接后将这些存储的数据传输到数据管理中心，从而使得监控数据不会丢失。
附图说明
图1是本发明在设定区域内定位无线胎儿监护探头的方法及装置实施例中定位无线胎儿监护探头的流程图；
图2是本发明实施例中参考点基站信号强度数据列表的取得流 程图；
图3是本发明实施例中取得一个无线胎儿监护探头的距离列表的流程图；
图4是本发明实施例中通过无线终端查找无线胎儿监护探头位置的流程图；
图5是本发明实施例中装置的结构示意图。
具体实施方式
下面将结合附图对本发明实施例作进一步说明。
如图1所示，在本发明的在设定区域内定位无线胎儿监护探头的方法及装置实施例中，构造一种在设定区域内定位无线胎儿监护探头的方法，包括如下步骤：
步骤S11在设定区域内通过多个无线基站发送指令要求各无线胎儿监护探头检测其接收到的无线基站信号强度：在本发明中，多个无线胎儿监护探头、多个无线基站和至少一个数据管理中心设置在设定区域内(通常是医院的产科病房及其附属区域)，形成一个监护网络。其中，多个无线胎儿监护探头均通过上述无线基站中的一个或多个连接到上述数据管理中心，该数据管理中心通过接收、分析和存储上述无线胎儿监护探头传输来的使用者的生理数据，实现对使用者胎儿的监护，并存储这些监护数据。同时，该数据管理中心也可以通过上述无线基站发出指令，使得在这些无线基站作用范围内的无线胎儿监护探头执行指定的动作，例如，发送特殊数据或发出蜂鸣声等等。由于在通常情况下，上述数据管理中心是装有特定软件的计算机，所以，该数据管理中心也可以将定位后的无线胎儿监护探头显示在其显示屏的地图上，便于医生或护士查看。至于如何设置这些无线基站以及如何对设定区域进行划分，在稍后详述。在本步骤中，数据管理中心通过设置在设定区域内不同位置的多个无线基站发送指令，要求其作用范围内的无线胎儿监护探头发送其接收到的基站信号强度数据表；
步骤S12各基站检测能够接收到的无线基站的信号强度，将其转换为信号等级，形成当前基站信号列表，并发送到数据管理中心： 当处于上述无线基站作用范围内的无线胎儿监护探头收到上述无线基站发出的指令时，多个无线胎儿监护探头分别搜索其能够接收到的所有基站信号(这些无线基站信号包括多个无线基站发出的信号)，将其接收到的基站信号经过强度量化后形成按照基站编号排列的基站信号强度数据表，将该基站信号强度数据表通过接收到的信号强度最大的一个基站发送到所述数据管理中心；值得一提的是，每个处于设定区域内的无线胎儿监护探头都会发出一个这样的数据表到数据管理中心。在本步骤中，具体而言，无线胎儿监护探头接收到软件基站发来的指令后，搜索所有可以接收到信号的基站；例如，一个无线胎儿监护探头能够接收到的、有信号强度的基站数为i，i小于等于该设定区域内设置的无线基站总数m，有信号的i个无线基站(AP)记录实际信号强度值(r数值)，其它m-i个AP记录r值为0，得到该无线胎儿监护探头所处位置的无线基站信号强度数据表r＝[rAP1，...，rAPm]，该表通过信号强度最大的一个无线基站发送到数据管理中心。
步骤S13将得到的每个无线胎儿监护探头的当前基站信号列表与事先得到的参考点基站信号列表运算，得到该无线胎儿监护探头与事先设定的参考点的距离，选择距离值最小的一个作为当前该无线胎儿监护探头的位置：在本步骤中，数据管理中心对其接收到的每一个无线胎儿监护探头发送来的无线基站信号强度数据表进行处理，将其分别与每个参考点的参考点基站信号强度数据表(该表存储在数据管理中心内，其取得或形成过程将在稍后说明)进行运算，以确定该无线胎儿监护探头的位置。具体来讲，在对一个无线胎儿监护探头进行定位时，将接收到的无线胎儿监护探头发送来的当前基站信号强度数据表和事先取得的、包括设定区域中多个参考点的基站信号强度的参考点基站信号强度数据表进行运算(每个参考点运算一次)，得到表示该无线胎儿监护探头所在位置与各参考点距离的距离参考表；选择其中距离值最小的一个参考点作为当前该无线胎儿监护探头的所在位置。在本步骤中，可以采取多种方法由无线胎儿监护探头接收到的基站信号强度和基站信号参考强度得到该探头所在位置与各基站之 间的距离(即建立基站布局及检测范围地图数据库)，例如，可以采用加权距离反转法、克里金法或欧式距离法。其中，欧式距离法相对前面两种方法实际实施起来相对简单，而且由于在医院特殊区域内实施，数据库不会太大，前面两种方案存在很多经验参数和插值计算，精确度上不如欧式距离法。所以，在本实施例中以欧式距离法为例，对上述距离的取得或数据库的建立进行说明。对一个无线胎儿监护探头发送的当前无线基站信号强度数据表和参考点信号强度数据表进行如下运算：
Figure PCTCN2015076643-appb-000001
而得到距离参考表；其中，m是设定区域内的所有无线基站的数量，i是无线胎儿监护探头能够接收到其信号的无线基站数量，rAP是该无线胎儿监护探头发送的信号强度数据表中的第j个无线基站的信号强度值，RAP是该参考点信号强度数据表中第j个无线基站的信号强度值；一个无线胎儿监护探头的当前无线基站信号强度列表通过分别与i个参考点的参考点信号强度列表进行上述运算，得到i个距离值，形成该无线胎儿监护探头的当前距离参考表，并由其中选择其距离值最小的一个作为该探头当前位置。在分别对所有发送无线基站信号强度数据表到数据管理中心的无线胎儿监护探头进行一遍上述处理过程后，就能够分别得到所有处于设定区域(或所有无线基站作用范围)内的无线胎儿监护探头的位置。
步骤S14标示上述无线胎儿监护探头的位置：在本步骤中，将上述得到的无线胎儿监护探头的位置标示在标示设定区域的地图上，该地图的来源稍后详述。
在本发明中，在执行上述步骤之前，需要在设定区域内设置多个无线基站，使得这些无线基站的信号能够覆盖设定区域的每个位置，从而使得只要无线胎儿监护探头的使用者在上述设定区域内，该无线胎儿监护探头都能够与上述无线基站中的至少一个建立连接，将其得到的生理数据通过该无线基站传输到上述数据管理中心，同时，也能够接收无线基站发出的，来自数据管理中心的指令。由于在现实中， 每个医院的设定区域的形状是不同的，其设置无线基站的位置和个数也是不同的，并不是一成不变的。但是，究其步骤而言，上述无线基站的设置和对设定区域的划分还是有规律可循的。具体而言，每个设定区域的无线基站设置均包括如图2所示的如下步骤：
步骤S21将多个无线基站分别设置在设定区域的多个不同位置上：在本步骤中，在上述设定区域内的不同位置分别设置多个无线基站；这些无线基站的设定位置以能够信号覆盖住该区域并保持一定的信号强度。值得一提的是，本步骤和步骤S22并没有明确的界限，在许多情况下，可能执行本步骤，然后执行步骤S22，在发现情况或得到的数据不符合要求时，再次返回执行本步骤，然后执行步骤S22，这样的反复可能会进行许多次，直到得到较为满意的数据为止。但是，如果设置完成，则在至少一段时间的定位或监护过程中，不会在对无线基站的设置进行改变。值得一提的是，在设置无线基站的数量或位置时，需要保证所有参考点的参考点信号强度数据表中，所有能够接收到的无线基站的信号等级均需大于设定的信号等级，如不能满足，通过调节所述无线基站位置或增加无线基站使其满足。
步骤S22将设定区域划分为多个识别区域，在每个识别区域内分别设置参考点，取得参考点上各无线基站的信号强度：在本步骤中，将上述设定区域划分为多个定位区域，每个定位区域设置一个参考点；取得所述多个参考定上的基站信号强度。
步骤S23得到每个参考点的参考点基站信号列表：在本步骤中，依次得到每个参考点的参考点基站信号强度数据表并分别存储。
具体来讲，在本发明中，在设置无线基站并对设定区域进行定位区域划分时，并没有特别严格的先后顺序，只要能够得到符合要求的参考点基站信号强度数据表即可。例如，可以根据医院布局建立无线胎儿监护探头网络的″基站布局及检测范围地图”；在医院先获得需要安装网络的楼层的建筑平面图，了解各个科室和布局，通过绘制工具，把该图纸简化输入软件中，形成可以很形象的看到该层(设定区域)的分布的″基站布局及检测范围地图″；根据设定区域的楼层结构布置基站，记录为m个AP，标记为AP1到APm；使用无线胎儿 监护探头测试基站信号强度R，比如，从低到高1～9级：在布置基站的过程中，通过无线胎儿监护探头测试基站信号强度，设定信号强度从低到高1～9级，在保证通讯良好的情况下，至少需要3级的信号强度，所以在所有需要用到无线胎儿监护探头的地方测试信号强度，如果信号太差，就增加一个基站或移动基站位置，一直到m个，保证无线胎儿监护探头信号强度在任意一个使用点都大于等于3级；在上述得到的平面图上按照比如1.5平米分割“识别区域”为N个，标记为区域1～区域n；在区域i(1～n)的任意一个点，通常使该区域的中心点，上标记为参考点Si(S1～Sn)：得到n个参考点Si(S1～Sn)；把一个无线胎儿监护探头放在已经选择的Si上，通过该探头扫描周围AP的信号强度R，并把数据传输到计算处理单元上，对取得的数据进行存储；在得到的数据中，有信号强度的基站数为1，1小于等于m，有信号的1个AP记录实际R数值，其它m-1个AP记录R值为0，记录信号强度数据表RSi＝[RAP1，...，RAPm]，这就是说，以后有了1个AP记录实际测量的信号强度值R，其他m-1个AP没有信号，所以记录为信号强度0，把记录汇总为该参考点的信号强度数据表RSi＝[RAP1，...，RAPm]，循环测试并记录所有参考点S1～Sn的R值表；得到该参考点的参考点基站信号强度数据表。对每个参考点重复上述步骤，得到所有参考点的参考点基站信号强度数据表，并将其存储在数据管理中心。
在本发明中，对于无线胎儿监护探头取得的基站信号，如果能够收到一个基站的信号，则将该基站的信号以接收到的信号的强度表示；对于不能接收到的无线基站的信号则以零表示；然后按照无线基站的编号顺序排列其对应的该点信号等级，得到该点的信号强度数据表或参考点信号强度数据表。至于对于基站信号的识别，由于基站发出的信号中均携带有表示该基站身份的识别码，所以，并不会出现不能识别的问题。这些识别码是在无线基站出厂时就已经存在于无线基站上的，例如，相当于网络的硬件地址的硬件识别码。同样地，在上述的无线胎儿监护探头上也存在这样的识别码，当无线胎儿监护探头发出任何信号时，都会携带其识别码，使得数据管理中心或无线基站能够 清楚识别这些信号的来源。
在本发明中，数据管理中心会分别对其接收到的多个无线胎儿监护探头发送来的多个信号强度数据表进行处理，以确定每个探头的位置。有多少个无线胎儿监护探头发送信号强度数据表到数据管理中心，数据管理就要进行多少次这样的处理。对于一个无线胎儿监护探头而言，其具体的处理或运算的过程如图3所示，包括：
步骤S31取得一个参考点的参考点信号强度列表：在本步骤中，取得一个参考点的参考点信号强度列表。这些参考点信号强度列表是如前所述，事先通过测量得到的。
步骤S32将该参考点信号强度列表中的数据和该无线胎儿监护探头传送的当前无线基站信号强度列表中的数据按照公式进行计算，得到该无线胎儿监护探头与该参考点的距离值：在本步骤中，按照公式
Figure PCTCN2015076643-appb-000002
对上述参考点的参考点信号强度列表和该无线胎儿监护探头发送的当前无线基站信号强度列表中的数据进行运算，得到一个该探头和该参考点的距离参数。
步骤S33对所有参考点重复上述步骤，得到该无线胎儿监护探头对所有参考点的距离值，选择距离最小的一个作为该无线胎儿监护探头的当前位置：步骤S31和S32得到该探头到一个无线基站的距离，而在本发明中，参考点总共有n个，所以需要重复上述步骤n次，遍历所有参考点的参考点基站信号强度数据表，得到n个这样的距离值，选择其值最小的一个(也就是无线胎儿监护探头距离该识别区域参考点最近的一个)作为该无线胎儿监护探头的位置。
值得一提的是，数据管理中心收到发送多少个无线胎儿监护探头发送的无线基站信号强度列表，上述步骤S31-S33就要重复多少次，分别确定每个探头的位置。
此外，在本发明中，对于离开设定区域的无线胎儿监护探头，由于其不能和无线基站连接，其监护数据也不能通过无线基站传输到数据管理中心进行处理及存档。为了取得这部分数据，当无线胎儿监护 探头不能接收到任何无线基站的信号时，将其取得的生理数据和该无线胎儿监护探头当前的状态数据以及时间数据存储在该无线胎儿监护探头内部；当该无线胎儿监护探头能够接收无线基站信号时，将上述存储的数据通过该无线基站发送到数据管理中心。
在本发明中，数据管理中心通过其连接的无线基站或其自身附带的无线基站发出指令，查找无线胎儿监护探头或与其进行数据交互。也就是说，在本发明中，除了数据管理中心、多个无线基站以及无线胎儿监护探头之外，还可以包括一个移动终端，该移动终端可以通过任何一个无线基站与系统连接，下载数据管理中心上的参考点基站信号强度列表、地图、识别区域的划分等数据，也可以下载数据管理中心识别或确定到的当前无线胎儿监护探头的位置信息。在某种意义上，可以将上述移动终端视为一个简化版的可移动的数据管理中心。在本发明中，该移动终端是一个可以由操作人员随身携带移动的、能够发出无线基站信号并与无线基站连接的移动计算机设备，例如，笔记本电脑或IPAD。
图4中示出了本发明中移动终端的工作流程方法流程。在图4中，包括如下步骤：
步骤S41初始化移动终端，通过无线基站取得数据管理中心的区域划分，参考点信号强度列表等数据：在本步骤中，移动终端初始化并由数据管理中心得到其工作需要的数据；无线终端初始化，寻找所述基站发出的无线网络：无线终端启动后，软件初始化，寻找基站信号，如果有信号，连接到基站上，接入无线网络，并且和基站的计算处理单元通讯；联网下载数据管理中心的″基站布局及检测范围地图″数据并更新，例如，可以每分钟更新一次数据。
步骤S42取得当前无线胎儿监护探头位置：在本步骤中，从数据管理中心上下载所有无线胎儿监护探头位置信息，并保存在该移动终端的MCU中；同时，也会从数据管理中心上下载所有报警事件信息，并保存在该移动终端的MCU中；如果有报警信号，在需要时，移动终端驱动其蜂鸣器发出声音，并显示报警信息；同样地，也可以在移动终端的屏幕上显示″基站布局及检测范围地图″，并标记出无 线胎儿监护探头位置和报警符号。
步骤S43有无线胎儿监护探头消失否，如是，执行步骤S44；否则返回步骤S43。
步骤S44无线终端开启搜寻模式，发出与无线基站相同的电磁波，开始搜寻消失的无线胎儿监护探头：在本步骤中，移动终端进入搜寻模式，发出电磁波，在医护人员的携带下进行搜寻。
在本发明中，该移动终端用于在已有的无线胎儿监护探头移动出设定区域时对其进行查找，取得该探头在失去与无线基站的联系期间的监护数据并上传到数据管理中心等等。换句话说，在本发明中，无线终端是该系统中的重要组成部分，它主要是由医护人员随身携带。也就是说只要在基站组成的无线网络内，移动终端相当于一个移动的简化″计算处理单元″，实现报警和显示等功能，在移动终端上可以查看无线胎儿监护探头的位置以及相关报警事件。该移动终端和数据管理中心的另一个重要功能是记录并保存孕妇的活动轨迹和跟踪寻找功能。这样，数据管理中心和移动终端中都实时的检测了无线胎儿监护探头的位置信息，当把这些信息按照时间顺序记录，就形成了该无线胎儿监护探头的轨迹信息。
在一个已有的无线胎儿监护探头消失时(这种情况一般是使用者移动出设定区域)，移动终端可以启动查找或搜寻功能，当基站和无线终端都检测不到该无线胎儿监护探头的位置信息时，移动终端自动启用查找或搜寻功能，移动终端控制内部的RF模块发出和基站一样的信号，根据存储的检测不到的无线胎儿监护探头的信息进行搜寻，此功能是让移动终端变为一个移动的″基站″，用于搜索无线胎儿监护探头，建立无线连接和通讯，以达到找到无线胎儿监护探头的目的。此时，移动终端如同一个移动基站，时刻发出请求连接的指令，医护人员拿着无线终端在医院内部寻找，当进入遗失的无线胎儿监护探头t(和孕妇绑在一起)一定距离处是，无线胎儿监护探头出现在了移动终端信号圆(即移动终端的作用范围)的范围内，即可以被识别到，此时终端的显示屏上会显示该无线胎儿监护探头信号强度较弱，在″圆″的顶端，同时移动终端施加在其蜂鸣器一个间隔为3s的8kHz 脉冲群，使其发声；如果医护人员拿着无线终端移动的方向相反，无线胎儿监护探头信号会减弱并消失，显示屏上不再显示″圆″，蜂鸣器停止发声；这时医护人员需要向相反方向移动，无线胎儿监护探头信号会逐渐变强，此时移动终端的显示屏上显示该无线胎儿监护探头信号强度增强，在″圆″的顶端同时″圆″的半径减小，同时终端的蜂鸣器发出间隔缩短为2s的8kHz脉冲群，也就是说，移动终端根据无线胎儿监护探头信号强度逐渐减小″圆″的半径，减少脉冲群的间隔，当找到探头时，″圆″变为一个″点″，移动终端的蜂鸣器发出没有间隔的声音。
当医护人员找到孕妇后，移动终端从无线胎儿监护探头上下载所有数据，无线胎儿监护探头把无线终端当作基站，传输数据，并取消无线胎儿监护探头的无线信号丢失报警；当医护人员和孕妇回到无线网络覆盖范围后，无线胎儿监护探头和无线终端和基站通讯，无线胎儿监护探头的数据通过基站发给数据管理中心，也就是说，此时，数据管理中心取消″无线胎儿监护探头无线信号丢失报警″并下载移动终端历史数据。
无线终端把存储的无线胎儿监护探头数据发给计算处理单元，计算处理单元取消″无线胎儿监护探头无线信号丢失报警″，同时根据时间标尺把该数据和孕妇数据库中的数据连接起来，保证数据不丢失。
此外，在本发明中，数据管理中心还可以用于更好管理不用的无线胎儿监护探头，例如，空置探头报警功能，用于通知医护人员及时对移动探头充电，防止要使用时，无线胎儿监护探头没有电量。具体为：数据管理单元实时查找所有的无线胎儿监护探头，并检测无线胎儿监护探头的状态，发现其中状态为非充电状态；同时，在一段时间内检测不到该无线胎儿监护探头发送的2监测信号，例如，无线超声探头无法检测到胎心率值、无线宫缩压力探头无法检测宫缩压力值持续10分钟，则表明该无线胎儿监护探头空置，没有使用；数据管理中心在”基站布局及检测范围地图”上显示所有空置无线胎儿监护探头位置并标红：提醒用户把无线胎儿监护探头放回充电座上；与此 同时，还可以使这些没有使用无线胎儿监护探头的蜂鸣器发声，提示医护人员过来处理该无线胎儿监护探头。
如图5所示，本发明还涉及一种实现上述方法的装置，包括：定位指令发出单元51、基站信号强度数据表形成单元52、定位单元53、参考点基站信号强度数据表形成单元54、存储单元55和位置标示单元56。其中，定位指令发出单元51用于使数据管理中心通过设置在设定区域内不同位置的多个无线基站发送指令，要求其作用范围内的无线胎儿监护探头发送其接收到的基站信号强度数据表；基站信号强度数据表形成单元52同于使收到所述指令的无线胎儿监护探头搜索所有其能够接收到的基站信号，将其接收到的基站信号经过强度量化后形成按照基站编号排列的基站信号强度数据表，将其通过接收到的信号强度最大的一个基站发送到所述数据管理中心；定位单元53用于对接收到的无线胎儿监护探头发送来的当前基站信号强度数据表和事先取得的、包括所述设定区域中多个参考点的基站信号强度的参考点基站信号强度数据表进行运算，得到表示所述无线胎儿监护探头所在位置与各参考点距离的距离参考表；选择其中距离值最小的一个参考点作为当前该无线胎儿监护探头的所在位置；参考点基站信号强度数据表形成单元54用于将所述设定区域划分为多个定位区域，每个定位区域设置一个参考点；取得所述多个参考定上的基站信号强度，将其量化，得到参考点基站信号强度数据表并存储；存储单元55用于当无线胎儿监护探头不能接收到任何无线基站的信号时，将其取得的生理数据和该无线胎儿监护探头当前的状态数据以及时间数据存储在所述无线胎儿监护探头内部；当无线胎儿监护探头能够接收无线基站信号时，将上述存储的数据通过该无线基站发送到数据管理中心；位置标示单元56用于在事先形成的地图上标记所有无线胎儿监护探头的当前位置。
更进一步地，上述定位单元53进一步包括距离参考表形成模块(图5中未示出)用于进行如下计算：
Figure PCTCN2015076643-appb-000003
而得到距离参考表；其中，m是设定区域内的所有无线基站的数量，i是所述参考点数量，rAP是该无线胎儿监护探头发送的信号强度数据表中的第j个无线基站的信号等级值，RAP是该参考点信号强度数据表中第j个无线基站的信号等级值；一个无线胎儿监护探头的当前无线基站信号强度列表通过分别与i个参考点的参考点信号强度列表进行上述运算，得到i个距离值，形成距离参考表。值得一提的是，在本发明中，在选择不同的计算方法时，上述距离参考表形成模块执行的运算可能不同，但其最终都会得到距离参考表。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (12)

  1. 一种在设定区域内定位无线胎儿监护探头的方法，其特征在于，包括如下步骤：
    A)数据管理中心通过设置在设定区域内不同位置的多个无线基站发送指令，要求其作用范围内的无线胎儿监护探头发送其接收到的基站信号强度数据表；
    B)收到所述指令的无线胎儿监护探头搜索所有其能够接收到的基站信号，将其接收到的基站信号经过强度量化后形成按照基站编号排列的基站信号强度数据表，将其通过接收到的信号强度最大的一个基站发送到所述数据管理中心；
    C)对接收到的无线胎儿监护探头发送来的当前基站信号强度数据表和事先取得的、包括所述设定区域中多个参考点的基站信号强度的参考点基站信号强度数据表进行运算，得到表示所述无线胎儿监护探头所在位置与各参考点距离的距离参考表；选择其中距离值最小的一个参考点作为当前该无线胎儿监护探头的所在位置。
  2. 根据权利要求1所述的在设定区域内定位无线胎儿监护探头的方法，其特征在于，所述步骤A)之前还包括如下步骤：
    M)在所述设定区域内的不同位置分别设置多个无线基站；
    N)将所述设定区域划分为多个定位区域，每个定位区域设置一个参考点；取得所述多个参考定上的基站信号强度，将其量化，得到参考点基站信号强度数据表并存储。
  3. 根据权利要求1所述的在设定区域内定位无线胎儿监护探头的方法，其特征在于，所述步骤B)或步骤N)中的量化包括：
    取得能够接收到的无线基站的信号强度值作为该基站的信号强度值，对于不能接收到的无线基站的信号强度值以零表示；按照无线基站的编号顺序排列其对应的该无线胎儿监护探头或该点的信号强度值，得到该点的基站信号强度数据表或参考点基站信号强度数据表。
  4. 根据权利要求3所述的在设定区域内定位无线胎儿监护探头的方法，其特征在于，参考点信号强度数据表中，所有能够接收到的 无线基站的信号等级均需大于设定的信号等级或信号强度；如不能满足，通过调节所述无线基站位置或增加无线基站使其满足。
  5. 根据权利要求1所述的在设定区域内定位无线胎儿监护探头的方法，其特征在于，还包括如下步骤：
    D)在事先形成的地图上标记无线胎儿监护探头的当前位置。
  6. 根据权利要求1所述的在设定区域内定位无线胎儿监护探头的方法，其特征在于，还包括如下步骤：
    所述数据管理中心发出带有无线胎儿监护探头身份识别号码的探头发声指令，使得接收到该指令的、其身份识别号码匹配的无线胎儿监护探头驱动其上的蜂鸣器发声。
  7. 根据权利要求1所述的在设定区域内定位无线胎儿监护探头的方法，其特征在于，还包括如下步骤：
    当无线胎儿监护探头不能接收到任何无线基站的信号时，将其取得的生理数据和该无线胎儿监护探头当前的状态数据以及时间数据存储在所述无线胎儿监护探头内部；当无线胎儿监护探头能够接收无线基站信号时，将上述存储的数据通过该无线基站发送到数据管理中心。
  8. 根据权利要求1所述的设定区域内定位无线胎儿监护探头的方法，其特征在于，所述数据管理中心通过其连接的无线基站或其自身附带的无线基站发出指令，查找无线胎儿监护探头或与其进行数据交互。
  9. 根据权利要求8所述的设定区域内定位无线胎儿监护探头的方法，其特征在于，还包括移动终端，所述移动终端通过无线基站由所述数据管理中心下载当前无线胎儿监护探头位置数据并显示；所述移动终端在发现现有的无线胎儿监护探头消失时，进入搜寻模式，发出与无线基站信号相同的电磁波，并显示该无线胎儿监护探头应答信息以查找该无线胎儿监护探头。
  10. 一种实现如权利要求1所述设定区域内定位无线胎儿监护探头方法的装置，其特征在于，包括：
    定位指令发出单元：用于使数据管理中心通过设置在设定区域内 不同位置的多个无线基站发送指令，要求其作用范围内的无线胎儿监护探头发送其接收到的基站信号强度数据表；
    基站信号强度数据表形成单元：同于使收到所述指令的无线胎儿监护探头搜索所有其能够接收到的基站信号，将其接收到的基站信号经过强度量化后形成按照基站编号排列的基站信号强度数据表，将其通过接收到的信号强度最大的一个基站发送到所述数据管理中心；
    定位单元：用于对接收到的无线胎儿监护探头发送来的当前基站信号强度数据表和事先取得的、包括所述设定区域中多个参考点的基站信号强度的参考点基站信号强度数据表进行运算，得到表示所述无线胎儿监护探头所在位置与各参考点距离的距离参考表；选择其中距离值最小的一个参考点作为当前该无线胎儿监护探头的所在位置。
  11. 根据权利要求10所述的装置，其特征在于，还包括：
    参考点基站信号强度数据表形成单元：用于将所述设定区域划分为多个定位区域，每个定位区域设置一个参考点；取得所述多个参考定上的基站信号强度，将其量化，得到参考点基站信号强度数据表并存储。
  12. 根据权利要求10所述的装置，其特征在于，还包括：
    存储单元：用于当无线胎儿监护探头不能接收到任何无线基站的信号时，将其取得的生理数据和该无线胎儿监护探头当前的状态数据以及时间数据存储在所述无线胎儿监护探头内部；当无线胎儿监护探头能够接收无线基站信号时，将上述存储的数据通过该无线基站发送到数据管理中心；
    位置标示单元：用于在事先形成的地图上标记无线胎儿监护探头的当前位置。
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US9931100B2 (en) 2018-04-03

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