WO2018046018A1 - Child transportation device weight sensing - Google Patents

Child transportation device weight sensing Download PDF

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Publication number
WO2018046018A1
WO2018046018A1 PCT/CN2017/101455 CN2017101455W WO2018046018A1 WO 2018046018 A1 WO2018046018 A1 WO 2018046018A1 CN 2017101455 W CN2017101455 W CN 2017101455W WO 2018046018 A1 WO2018046018 A1 WO 2018046018A1
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WO
WIPO (PCT)
Prior art keywords
child
weight
transportation device
basket
child transportation
Prior art date
Application number
PCT/CN2017/101455
Other languages
French (fr)
Inventor
Nicolas Gonzalez GARRIDO
Srdjan Jovanovic
Original Assignee
Suzhou Swandoo Children's Articles Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201621050502.6U external-priority patent/CN206141378U/en
Priority claimed from CN201621050426.9U external-priority patent/CN206049417U/en
Priority claimed from CN201610817633.0A external-priority patent/CN106314211A/en
Application filed by Suzhou Swandoo Children's Articles Co., Ltd. filed Critical Suzhou Swandoo Children's Articles Co., Ltd.
Publication of WO2018046018A1 publication Critical patent/WO2018046018A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/26—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles for children
    • B60N2/28—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle
    • B60N2/2842—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle adapted to carry the child, when dismounted from the vehicle
    • B60N2/2848—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle adapted to carry the child, when dismounted from the vehicle being convertible or adaptable to a preambulator, e.g. a baby-carriage or a push-chair
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/002—Seats provided with an occupancy detection means mounted therein or thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/26—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles for children
    • B60N2/28—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle
    • B60N2/2821—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle having a seat and a base part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/26—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles for children
    • B60N2/28—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle
    • B60N2/2842—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle adapted to carry the child, when dismounted from the vehicle
    • B60N2/2845—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle adapted to carry the child, when dismounted from the vehicle having handles

Definitions

  • This disclosure relates to a child transportation device such as a child safety seat, with the ability to detect the weight of a child in the child transportation device.
  • safety measures in automobiles such as safety belts and safety air bags are designed to meet the height and weight of adults. If children are seated in the front seat with the safety belt fastened, since the heights and weights of children are different from those of adults, injuries to children can be made worse instead of being relieved. Therefore, motor vehicle safety measures specially designed for children are needed.
  • Child safety seats are meant to be fixed on automobile seats for children to sit in.
  • Child safety seats are generally provided with restraint equipment that is able to restrain children to maintain the safety of children to the maximum extent when a car accident happens.
  • Child safety seats of various types are available on the market, for example, an automobile child basket for children disclosed in the Chinese patent document with the patent number of CN 204712912U. This automobile basket for children is simple in function. However, the seat system is not able to determine whether or not the basket needs to be replaced because the weight of the child is outside of the design limits for the basket.
  • a child basket and an intelligent car disclosed in the Chinese patent document with the patent number of CN 105539345 A uses a weight sensor to detect the weight added to the basket by a child, and outputs a weight signal to confirm whether a child is in the child basket or not.
  • the weight sensor is only used for detecting whether a child is in the child basket or not.
  • a child transportation device includes a body weight measurement device that is constructed and arranged to determine the weight of a child in the child transportation device.
  • the child transportation device may include a child seat.
  • the child seat may comprise a hand basket, and a handle coupled to the hand basket.
  • the body weight measurement device may be on or in one or both of the hand basket and the handle.
  • the body weight measurement device may comprise a weight measurement module that is mechanically coupled to the handle.
  • the weight measurement module may comprise a force sensor in the handle.
  • the weight measurement module may further comprise a hand grip that is mechanically coupled to the handle.
  • the weight measurement module may further comprise a structure that is connected to both the hand grip and the force sensor, where the structure transfers force from the hand grip to the force sensor.
  • the force sensor may comprise a load cell.
  • the body weight measurement device may comprise a weight measurement module, and a weight processing control module comprising a microprocessor, wherein the weight measurement module is operably coupled to the weight processing control module and transmits measured weight data to the microprocessor.
  • the child transportation device may comprise a hand basket, and a handle coupled to the hand basket.
  • the body weight measurement device may comprise a force sensor that is mechanically coupled to the handle.
  • the body weight measurement device may comprise a weight measurement module that is operably coupled to a microprocessor.
  • the microprocessor may be configured to determine the weight of the child in the child transportation device.
  • the microprocessor may be operably coupled to at least one of a display unit that is configured to display the weight, and a communication unit that is configured to communicate the weight.
  • the child transportation device may comprise a hand basket, and a handle coupled to the hand basket.
  • the display unit may be on one or both of the hand basket and the handle.
  • the display may also be accomplished on a mobile device with an appropriate app.
  • the communication unit may be configured to transmit the weight by at least one of short message service and Bluetooth, or any other type of wireless data transmission, for example to the mobile device.
  • the microprocessor may comprise a weight data processing functionality that is configured to calculate the weight of the child by subtracting the empty weight of the child transportation device from the combined weight of the child and the child transportation device.
  • the microprocessor may comprise a weight judgment functionality that is configured to determine if the child transportation device should be replaced based on a comparison of the determined weight of the child to child transportation device weight-carrying range standards.
  • the child transportation device may further comprise a prediction function, responsive to the weight of the child in the hand basket, that is configured to predict that the child is going to outgrow the hand basket.
  • the child transportation device may further comprise a notification function, responsive to the prediction function, that is configured to wirelessly transmit a notification of the prediction, for example to a parent or other responsible adult.
  • a child transportation device in another aspect, includes a child seat that comprises a hand basket, and a handle coupled to the hand basket. There is a body weight measurement device that is constructed and arranged to determine the weight of a child in the hand basket, wherein the body weight measurement device comprises a load cell in the handle, and a hand grip that is mechanically coupled to the handle by a structure that transfers force from the hand grip to the load cell.
  • Embodiments may include one of the above and/or below features, or any combination thereof.
  • the body weight measurement device may comprise a microprocessor that comprises a weight data processing functionality that is configured to calculate the weight of the child by subtracting the empty weight of the child transportation device from the combined weight of the child and the child transportation device.
  • the microprocessor may comprise a weight judgment functionality that is configured to determine if the child transportation device should be replaced based on a comparison of the determined weight of the child to child transportation device weight-range standards.
  • the child transportation device may further comprise a prediction function, responsive to the weight of the child in the hand basket, that is configured to predict that the child is going to outgrow the hand basket.
  • the child transportation device may further comprise a notification function, responsive to the prediction function, that is configured to wirelessly transmit a notification of the prediction.
  • Fig. 1 is a disassembled view of a child transportation device.
  • Figs. 2A and 2B are perspective and side views of the child transportation device of fig. 1.
  • Fig. 3 is a side view of another child transportation device.
  • Fig. 4 is a functional block diagram of a body weight measurement device of a child transportation device.
  • Fig. 5 is a rear view of a child transportation device.
  • Fig. 6 is a partial, cross-sectional view of a weight measurement module for a weight measurement device for a child transportation device.
  • Fig. 7 is a flow chart illustrating steps involved in weight measurement and recommendation of child basket size based on weight.
  • the disclosure aims to overcome the defects of the prior art and provides a child basket that has a body weight measurement device. Child weight can be measured accurately, and whether the basket needs to be replaced can be judged according to the measured child weight. Also, a parent can be notified in advance when a child is about to outgrow the current basket.
  • a child transportation device can include a body weight measurement device that is constructed and arranged to determine the weight of a child in the child transportation device.
  • the child transportation device may include a child seat.
  • the child seat may comprise a hand basket, and a handle coupled to the hand basket.
  • the body weight measurement device may be on or in one or both of the hand basket and the handle.
  • the body weight measurement device may comprise a weight measurement module that is mechanically coupled to the handle.
  • the weight measurement module may comprise a force sensor in the handle.
  • the weight measurement module may further comprise a hand grip that is mechanically coupled to the handle.
  • the weight measurement module may further comprise a structure that is connected to both the hand grip and the force sensor, where the structure transfers force from the handle to the force sensor.
  • the force sensor may comprise a load cell.
  • the body weight measurement device may comprise a weight measurement module, and a weight processing control module comprising a micro-control processing unit (e.g., a microprocessor or microcontroller) , wherein the weight measurement module is operably coupled to the weight processing control module and transmits measured weight data to the microprocessor.
  • the child transportation device may comprise a hand basket, and a handle coupled to the hand basket, wherein the body weight measurement device comprises a force sensor that is mechanically coupled to the handle.
  • the body weight measurement device may comprise a weight measurement module that is operably coupled to a microprocessor.
  • the microprocessor may be configured to determine the weight of the child in the child transportation device.
  • the microprocessor may be operably coupled to at least one of a display unit that is configured to display the weight, and a communication unit that is configured to communicate the weight.
  • the child transportation device may comprise a hand basket, and a handle coupled to the hand basket.
  • the display unit may be on one or both of the hand basket and the handle.
  • the communication unit may be configured to transmit the weight by at least one of short message service (SMS) and Bluetooth.
  • SMS short message service
  • the microprocessor may comprise a weight data processing unit/capability that is configured to calculate the weight of the child by subtracting the empty weight of the child transportation device from the combined weight of the child and the child transportation device.
  • the microprocessor may comprise a weight judgment unit/capability that is configured to determine if the child transportation device should be replaced based on a comparison of the determined weight of the child to child transportation device weight-range standards.
  • a child basket provided with a body weight measurement device can comprise a basket body and a basket handle arranged on the basket body, wherein a weight measurement module is arranged on the basket handle.
  • a weight processing control module comprises a microprocessor, and a display unit connected with the microprocessor and used for displaying weight data. The weight measurement module is connected with the weight processing control module and transmits measured weight data to the microprocessor.
  • the weight measurement module comprises one or more pressure sensors used for measuring the basket weight. If a child is in the basket, the measured weight includes the basket plus the child.
  • the microprocessor comprises a weight data processing unit/capability used for determining the child’s weight, and a weight logic judgment unit/capability connected with the weight data processing capability and used for judging whether the basket needs to be replaced or not according to the child’s weight.
  • the weight processing control module further comprises a communication unit which can send child weight information to client sides (i.e., enabled devices of third-party recipients) , such as responsible adults, safety authorities, and others.
  • client sides i.e., enabled devices of third-party recipients
  • the communication unit comprises a mobile communication unit which can send the child weight information to the client sides in an SMS form, and a Bluetooth and/or RF communication unit which can wirelessly communicate the child weight information to the client sides and to others.
  • the client sides i.e., the recipients of the communication from the mobile communication unit
  • the client sides include mobile phone client sides and PC client sides, and child body weight measurement application programs (apps) are present on the client-side devices.
  • the child basket provided with the subject body weight measurement device can accurately measure a child’s weight. Advice as to whether the basket needs to be replaced or not can be made based on review of the calculated weight of the occupied child basket and knowledge of the weight limit range of the child basket. Also, the child weight is tracked and recorded. Sensed weight data, and other car seat system data such as GPS-derived location, and GPS speed, and time, can be logged. Weight data can be sent to client sides through SMS, Bluetooth, and the like.
  • a child basket provided with the body weight measurement device can comprise a basket body, and a basket handle arranged on the basket body.
  • a weight measurement module can be arranged on the basket handle.
  • the weight measurement module is operably coupled to the weight processing control module in any convenient manner.
  • the weight measurement module can be coupled to the weight processing control module through a cable, or wirelessly.
  • the weight measurement module transmits measured weight data to the weight processing control module, and the weight processing control module conducts corresponding operations according to the weight data.
  • the weight measurement module can include one or more pressure or force sensors, or any other type of sensor from which weight can be determined.
  • the sensor (s) data can be converted into a variable physical quantity of force, namely, weight.
  • Pressure sensors can be piezo-resistive pressure sensors or other types of now-known or future-developed pressure sensors.
  • a force sensor When used, it can be a load cell, or any other type of now-known or future-developed force sensor.
  • the weight measurement module is arranged in the middle of the basket handle. When the basket is lifted by the basket handle, the sensor/weight measurement module detects the force, which can then be converted to weight by a processor. The weight data can then be input to the weight processing control module for further processing.
  • the weight processing control module can comprise a microprocessor. There can also be a display unit that is operably connected to the microprocessor.
  • the weight measurement module can input measured weight data to the microprocessor.
  • the microprocessor can determine the child’s weight. It can also create a message indicating whether the basket needs to be replaced or not, based on the child’s weight.
  • the child’s weight and the message indicating whether the basket needs to be replaced or not can also be displayed on the display unit and/or wirelessly transmitted to third-party recipients.
  • the microprocessor may comprise a weight data processing unit/capability, and a weight logic judgment unit/capability connected to the data processing unit/capability.
  • the weight data processing unit/capability is configured to process detected weight data and calculate the child’s weight.
  • the child’s weight can be obtained by subtracting weight data measured by the weight measurement module before a child is placed in the basket from the weight data measured by the weight measurement module after the child is placed in the basket.
  • the weight logical judgment unit/capability can be configured to judge whether the basket needs to be replaced by a basket of another type or not, according to the calculated child weight data.
  • the child weight data can also be used to predict or anticipate the need for a larger seat or basket, as the child is about to outgrow the seat.
  • the system can make weight measurements over time and track the trend of weight increase.
  • the trend can be used to determine when the child is about to outgrow the seat, and notify a responsible adult accordingly.
  • the prediction can be made by extrapolating the weight measurement data trend to the point (the date) where the maximum weight for the current seat will be (or is likely to be) surpassed.
  • the prediction could use standard child weight data (which can be readily obtained from sources such as government databases) to determine an average or typical weight gain per time for an average or typical child with the child’s current weight.
  • the prediction algorithm regarding the child outgrowing the seat is independent of the particular weight sensing devices and methodologies described in this document, and could be used with other weight-sensing devices, technologies, or methodologies.
  • child baskets are classified into four types according to child ages and weights.
  • Type 1 automobile child baskets suitable for children from newborns to children at the age of 15 months (or infants with body weights from 2.2 kg to 13 kg)
  • type 2 automobile child baskets suitable for children from newborns to children at the age of four years (or children with body weights from 2.2 kg to 18 kg)
  • type 3 automobile child baskets suitable for children from one year to twelve years (or children with body weights from 9 kg to 36 kg)
  • type 4 automobile child baskets suitable for children from three years to twelve years (or children with body weights from 15 kg to 36 kg) .
  • the above is but one of many standards that can be used herein; the disclosure is not limited to any standard, any weight ranges, or any number of recommended child transportation devices.
  • weight data before a child is placed in the child basket is taken: before the child is placed in the child basket, the weight measurement module obtains the weight data through the pressure sensors, the obtained weight data are recorded as first (i.e., empty basket) weight data, and the first weight data are output to the weight data processing unit/capability of the microprocessor and stored in the memory associated with the microprocessor.
  • the determination of when the basket is empty can be made in one or more of several manners.
  • the child transportation device can include a user interface that can allow the adult to specify that the seat is empty. Or, this could be done through the mobile device app.
  • weight data after the child is placed in the child basket is measured: after the child is placed in the child basket, the weight measurement module detects the weight data through the force or pressure sensors, and the detected weight data are recorded as second weight data. The second weight data are output to the weight data processing unit/capability in the microprocessor and stored in the memory associated with the microprocessor.
  • the child’s weight is determined by combining (e.g., averaging) more than one weight deterrnination.
  • the data processing unit/capability can work out child weight data according to the weight data obtained by conducting multiple measurements, and the child weight data is input to the weight logic judgment unit. Whether the basket needs to be replaced or not is judged according to the child weight data.
  • the current child weight and a prompt showing whether the basket needs to be replaced or not can be displayed on the display. All of the data can be logged for other uses. For example, if there is an accident the logged data could be reviewed to determine if the child was in an appropriate seat.
  • this data could be used as a defense by the seat manufacturer to a claim of liability for injury to the child.
  • Other data sensed by the seat can also be logged, and reviewed after the fact as needed. For example, such data could be useful in accident forensics.
  • the current basket is for children up to about 13 Kg.
  • the weight logic judgment unit/capability judges whether the current child weight is greater than 13 Kg or not, and if the current weight is not greater than 13 Kg it indicates that the basket is suitable for the child. If the current weight is greater than 13 Kg, whether the current weight is greater than 18 Kg is further judged. If the current weight is less than 18 Kg, it indicates that the basket is not suitable for the child, and a basket of the second type (13 to 18 Kg) needs to be selected. If the current weight is greater than 18 Kg, it indicates that a basket of the third type (18 Kg and above) needs to be selected.
  • the weight processing control module further comprises a communication unit that is configured to send child weight information to client sides.
  • This child weight information can include one or more of the child weight, a message showing whether the basket is still appropriate for the child, or needs to be replaced, and a prediction of when the child is expected to outgrow the current seat/basket.
  • the message can include a recommendation of the proper size basket for the child’s current weight.
  • the communication unit may comprise one or both of a mobile communication unit and a Bluetooth communication unit.
  • the mobile communication unit can be configured to send the child weight information to client sides in a short message service (SMS) form
  • the Bluetooth communication unit can be configured to wirelessly send the child weight information to the client sides using the Bluetooth standard.
  • Data can also be sent by radio frequency (RF) or any other now-known or future-developed wireless transmission standard.
  • the client sides can include mobile phone client sides and PC client sides, for example.
  • Child body weight management application programs (Apps) can be arranged on the client sides so as to be able to further analyze the child weight data to generate charts and the like, which can simplify display, tracking, and recording of the child weight data. Weight data tracking over time by the app can be useful for a variety of purposes. For example, medical professionals can use tracked weight data to help care for the child.
  • the body weight measurement device can also include a power management unit, which can be operably connected to the microprocessor, the display unit, and the communication unit.
  • Power management is a standard function that can be useful to help maintain proper operation of the microprocessor, the display unit, and the communication unit.
  • the body weight measurement device can be arranged on the bottom of the child basket and still be used for measuring child’s weight after a child is placed in the child basket.
  • one or more weight or pressure sensors could be located underneath the lower cushion of the car seat, inside of the hard outer shell of the seat. An advantage of this location is that the seat does not need to be lifted in order to determine the child’s weight. Also, such pressure sensor (s) can be used as presence detectors that can determine if a child is present in the car seat.
  • the child transportation device provided with the body weight measurement device is also suitable for other child carrying devices/seats such as but not limited to a child safety seat, a child stroller, and a bicycle street.
  • the body weight measurement device can be arranged on the child safety seat or the child stroller or the bicycle street to detect whether the child safety seat or child basket is suitable for a child or not and to send out a warning message when the child safety seat or child basket is not suitable for the child.
  • a child basket provided with the present body weight measurement device is able to accurately determine the weight of a child located in the child basket. It is also able to determine whether the basket needs to be replaced or not, based on the child’s weight. Also, the child’s weight can be tracked and recorded, which can be accomplished by sending information to client sides through SMS, Bluetooth, and the like.
  • Fig. 1 illustrates an exemplary child transportation device (child seat) 100 that comprises hand basket 1 that is adapted to fit an infant or child, with pivoting carry handle 12.
  • the basket can be carried by grasping the handle and lifting the basket off the ground or other surface on which the child seat is located.
  • Basket 1 can be releasably coupled to base 2.
  • base 2 In general, child seats are known in the art, so certain details of the seat will not be described herein.
  • basket 1 includes shell 6 with front portion 4, rear portion 3, and lower rear portion 5.
  • basket 1 can also be removably mounted to stroller frame 30 to create a child stroller 300.
  • This disclosure is not limited to any particular type of child transportation device, or to any particular type of child seat or basket, as the disclosure relates to weight sensing in a child transportation device.
  • Body weight measurement device 40 includes weight measurement module 50 that is placed such that it is able to sense either the weight of the child located in the child transportation device, or the combined weight of the child and the child transportation device. Placement details are set forth elsewhere. Weight data from weight measurement module 50 are provided to microprocessor 42. Microprocessor 42 also controls optional display unit 44 and commtmication unit 46. Display unit 44, when present, can be located in a desired location on the exterior shell of the child transportation device. Power management unit 48 provides power to microprocessor 42, display unit 44, and communication unit 46, and also may provide power to the other functional units, not shown.
  • a child seat 60 is shown in a rear view in fig. 5.
  • Child seat 60 has rear surface 62 with cavity-type hand-hold 68. Note that child’s head 66 is visible in fig. 5, as is pivoting basket handle 64.
  • Fig. 6 is an enlarged, partial view of part of child transportation device handle 107 which includes a specific, non-limiting version of weight measurement module 90.
  • Handle 107 includes inner handle portion 106 and outer handle portion 108, which are mechanically coupled together by any convenient or conventional mechanical structure, not shown here.
  • Force sensor 101 is built into handle 107 and comprises load cell 102 fixed to beam 104.
  • Beam 104 is mechanically coupled to handle 107, such as via standoffs 113 and 114.
  • Hand grip 110 is located just below handle portion 106, and placed such that an adult’s palm/fingers will normally press up against hand grip 110 (in the direction of arrow “A” ) when the child transportation device is lifted by the handle.
  • Mechanical structure 112 mechanically couples hand grip 110 to the underside of beam 104, or at a minimum is configured to transfer force from hand grip 110 to beam 104.
  • force is placed on hand grip 110.
  • This force is coupled to beam 104 by structure 112.
  • the force causes beam 104 to deflect.
  • the deflection is sensed by load cell 102.
  • Load cell 102 has an output signal that is provided to printed circuit board (PCB) 120, which can be located in or on the handle, or in or on any other part of the child transportation device.
  • PCB 120 can include amplifiers, conditioning electronics or other electrical/electronic components that are involved in determining the weight of the child transportation device based on the signals from load cell 102.
  • All of the functionality necessary to determine the weight, and to make judgments of appropriate sizes of child transpiration devices based on the sensed weight of the child, can be located anywhere on or in the child transportation device.
  • the electronics (depicted functionally in fig. 4) are located on one or more small PCB (s) that are located in the handle. Multiple PCBs can be electrically connected by cables.
  • Wireless communication schemes such as Bluetooth Low Energy (BLE) or other now-known or future-developed schemes can alternatively or additionally be used for inter-board/inter-device communication.
  • load cell 102 can be a CZL700D strain-gauge type load cell available from Dongguan Uchi Electronics Co., Ltd., Samsung Industrial Park, Yucai Road, Jinju, Dalingshan, Dongguan, Guangdong, China (523820) .
  • Strain-gauge load cells convert the load acting on them into electrical signals. The measuring is done with very small resistor patterns called strain gauges -effectively small, flexible circuit boards. The gauges are bonded onto a beam or structural member that deforms when weight (force) is applied, in turn deforming the strain-gauge. As the strain gauge is deformed, its electrical resistance changes in proportion to the load.
  • the particular device selected should be able to measure weights that include the weight values for the particular car seat, or the various types of car seats as discussed elsewhere herein.
  • a 24-bit digital value can be read from the load cell via an analog to digital converter. The value can be read when the seat is empty and the child seat is being held by the handle in a normal manner. The weight with a child present is also sensed in the same way.
  • a “normal” manner can be determined in a desired fashion. For example, if the force is inconsistent, it could be that the person is walking with the car seat and the seat is slightly bouncing and thus adding to/subtracting from the actual force as the seat moves up and down. Also, grip strength could have an effect on force sensing.
  • the system could also send a wireless message to the user (e.g., via BLE to the mobile device with the app) to carry the seat in a gentler manner. Also, since measurements can be taken quite frequently given the particular sensors and processors used, the system can continuously average the readings, to help account for inconsistencies due to the manner in which the handle is held and the like. Also, outlier values can be ignored, as the weight of a child will naturally change very slowly as compared to the speed at which measurements can be taken.
  • load cells or strain gauges or other types of force or weight-measurement devices can be used herein, as the disclosure is not limited to any particular manner or means of sensing weight.
  • a strain sensor can be used, such as the BF350-3AAA strain sensor from AGS-Tech, Inc., of Albuquerque, New Mexico, USA.
  • a strain sensor can be mounted on a thin ceramic tile to which the load force is applied such that the tile bends under the applied force. Weight can be determined from the strain sensor output.
  • the location of the force sensor/weight measurement module in the handle is not a limitation, as the weight of the child basket plus child can be determined by a weight sensor located elsewhere in the child transportation device.
  • the weight of the child can be sensed by placing one or more appropriate sensors directly underneath the child, such as underneath the cushion on which the child rests.
  • Fig. 7 is a flow chart of the operation of a weight judgment functionality 70 for the child transportation device weight sensing herein.
  • weight judgment functionality 70 is accomplished using microprocessor 42.
  • the weight judgment functionality 70 is configured to determine if a child transportation device should be replaced because the child weighs too much for the current device, and/or to predict when the device or seat or basket will likely need to be replaced. This determination can be based on any now-known or future-developed local, regional, national, or international standard, or based on any other information.
  • weight judgment functionality 70 is able to judge whether the child’s weight meets any one of three weight ranges that are predetermined and stored in memory associated with microprocessor 42, such as the ranges described above.
  • the weight measurement module collects data. This data is passed to the microprocessor, step 74, where the child’s weight is determined, as described above. The current weight can then be compared to two weight standards. If the weight is less than the first (the lowest) weight standard, step 76, the judgment is to keep the current basket, step 78. The judgments are typically outputted to a responsible adult via one or both of the display unit 44 and the communication unit 46. If the weight is greater than the first limit, at step 80 the weight judgment functionality determines if the weight is above a second, higher limit. If it is not, then the judgment is to recommend the next larger basket, step 82. If the weight is greater than the second limit, the judgment is to recommend the third (the largest) basket, step 84. Weight tracking and logging can be used to predict that a child is close to outgrowing the seat, as described above. This can afford a parent time to obtain the next largest size before the child actually outgrows the current seat.
  • weight judgment functionality can be based on one, two, three, four, or more weight limits, as desired, or as necessary to meet the appropriate standard being followed.
  • Elements of figures are shown and described as discrete elements in a block diagram. These may be implemented as one or more of analog circuitry or digital circuitry. Alternatively, or additionally, they may be implemented with one or more microprocessors executing software instructions.
  • the software instructions can include digital signal processing instructions. Operations may be performed by analog circuitry or by a microprocessor executing software that performs the equivalent of the analog operation.
  • Signal lines may be implemented as discrete analog or digital signal lines, as a discrete digital signal line with appropriate signal processing that is able to process separate signals, and/or as elements of a wireless communication system.
  • the steps may be performed by one element or a plurality of elements. The steps may be performed together or at different times.
  • the elements that perform the activities may be physically the same or proximate one another, or may be physically separate.
  • One element may perform the actions of more than one block.

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  • Child & Adolescent Psychology (AREA)
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Abstract

A child transportation device (100) includes a body weight measurement device (40) that is constructed and arranged to determine the weight of a child in the child transportation device (100). The child transportation device (100) may include a child seat (100, 60). The child seat (100, 60) may have a hand basket (1), and a basket-carry handle (12, 107, 64) coupled to the hand basket (1). The body weight measurement device (40) may comprise a weight measurement module (50) that is mechanically coupled to the handle (12, 107, 64). The weight measurement module (50) may comprise a force sensor (101) in the handle (12, 107, 64). The weight measurement module (50) may further comprise a hand grip (110) that is mechanically coupled to the handle (12, 107, 64). The weight measurement module (50) may further comprise a structure (112) that is connected to both the hand grip (110) and the force sensor (101), where the structure (112) transfers force from the hand grip (110) to the force sensor (101). The force sensor (101) may comprise a load cell (102).

Description

CHILD TRANSPORTATION DEVICE WEIGHT SENSING BACKGROUND
This disclosure relates to a child transportation device such as a child safety seat， with the ability to detect the weight of a child in the child transportation device.
With the development of science and technology and the growth of the living standard， automobiles have become indispensable vehicles， and passenger safety is a critical issue. Generally， safety measures in automobiles such as safety belts and safety air bags are designed to meet the height and weight of adults. If children are seated in the front seat with the safety belt fastened， since the heights and weights of children are different from those of adults， injuries to children can be made worse instead of being relieved. Therefore， motor vehicle safety measures specially designed for children are needed.
Child safety seats are meant to be fixed on automobile seats for children to sit in. Child safety seats are generally provided with restraint equipment that is able to restrain children to maintain the safety of children to the maximum extent when a car accident happens. Child safety seats of various types are available on the market， for example， an automobile child basket for children disclosed in the Chinese patent document with the patent number of CN 204712912U. This automobile basket for children is simple in function. However， the seat system is not able to determine whether or not the basket needs to be replaced because the weight of the child is outside of the design limits for the basket.
In addition， a child basket and an intelligent car disclosed in the Chinese patent document with the patent number of CN 105539345 A， uses a weight sensor to detect the weight added to the basket by a child， and outputs a weight signal to confirm whether a child is in the child basket or not. The weight sensor is only used for detecting whether a child is in the child basket or not.
SUMMARY
All examples and features mentioned below can be combined in any technically possible way.
In one aspect， a child transportation device includes a body weight measurement device that is constructed and arranged to determine the weight of a child in the child transportation device. The child transportation device may include a child seat. The child seat may comprise a hand basket， and a handle coupled to the hand basket. The body weight measurement device may be on or in one or both of the hand basket and the handle. The body weight measurement device may comprise a weight measurement module that is mechanically coupled to the handle. The weight measurement module may comprise a force sensor in the handle. The weight measurement module may further comprise a hand grip that is mechanically coupled to the handle. The weight measurement module may further comprise a structure that is connected to both the hand grip and the force sensor， where the structure transfers force from the hand grip to the force sensor. The force sensor may comprise a load cell.
The body weight measurement device may comprise a weight measurement module， and a weight processing control module comprising a microprocessor， wherein the weight measurement module is operably coupled to the weight processing control module and transmits measured weight data to the microprocessor. The child transportation device may comprise a hand basket， and a handle coupled to the hand basket. The body weight measurement device may comprise a force sensor that is mechanically coupled to the handle.
The body weight measurement device may comprise a weight measurement module that is operably coupled to a microprocessor. The microprocessor may be configured to determine the weight of the child in the child transportation device. The microprocessor may be operably coupled to at least one of a display unit that is configured to display the weight， and a communication unit that is configured to communicate the weight. The child transportation device may comprise a hand basket， and a handle coupled to the hand basket. The display unit may be on one or both of the hand basket and the handle. The display may also be accomplished on a mobile device with an appropriate app. The communication unit may be configured to  transmit the weight by at least one of short message service and Bluetooth， or any other type of wireless data transmission， for example to the mobile device. The microprocessor may comprise a weight data processing functionality that is configured to calculate the weight of the child by subtracting the empty weight of the child transportation device from the combined weight of the child and the child transportation device. The microprocessor may comprise a weight judgment functionality that is configured to determine if the child transportation device should be replaced based on a comparison of the determined weight of the child to child transportation device weight-carrying range standards.
The child transportation device may further comprise a prediction function， responsive to the weight of the child in the hand basket， that is configured to predict that the child is going to outgrow the hand basket. The child transportation device may further comprise a notification function， responsive to the prediction function， that is configured to wirelessly transmit a notification of the prediction， for example to a parent or other responsible adult.
In another aspect， a child transportation device includes a child seat that comprises a hand basket， and a handle coupled to the hand basket. There is a body weight measurement device that is constructed and arranged to determine the weight of a child in the hand basket， wherein the body weight measurement device comprises a load cell in the handle， and a hand grip that is mechanically coupled to the handle by a structure that transfers force from the hand grip to the load cell.
Embodiments may include one of the above and/or below features， or any combination thereof. The body weight measurement device may comprise a microprocessor that comprises a weight data processing functionality that is configured to calculate the weight of the child by subtracting the empty weight of the child transportation device from the combined weight of the child and the child transportation device. The microprocessor may comprise a weight judgment functionality that is configured to determine if the child transportation device should be replaced based on a comparison of the determined weight of the child to child transportation device weight-range standards.
The child transportation device may further comprise a prediction function， responsive to the weight of the child in the hand basket， that is configured to predict that the child is going to outgrow the hand basket. The child transportation device may further comprise a notification function， responsive to the prediction function， that is configured to wirelessly transmit a notification of the prediction.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a disassembled view of a child transportation device.
Figs. 2A and 2B are perspective and side views of the child transportation device of fig. 1.
Fig. 3 is a side view of another child transportation device.
Fig. 4 is a functional block diagram of a body weight measurement device of a child transportation device.
Fig. 5 is a rear view of a child transportation device.
Fig. 6 is a partial， cross-sectional view of a weight measurement module for a weight measurement device for a child transportation device.
Fig. 7 is a flow chart illustrating steps involved in weight measurement and recommendation of child basket size based on weight.
DETAILED DESCRIPTION
The disclosure aims to overcome the defects of the prior art and provides a child basket that has a body weight measurement device. Child weight can be measured accurately， and whether the basket needs to be replaced can be judged according to the measured child weight. Also， a parent can be notified in advance when a child is about to outgrow the current basket.
For achieving the above purposes， the following technical scheme may be provided.
A child transportation device can include a body weight measurement device that is constructed and arranged to determine the weight of a child in the child transportation device. The child transportation device may include a child seat. The child seat may comprise a hand basket， and a handle coupled to the hand basket. The body weight measurement device may be on or in one or both of the hand basket and the handle. The body weight measurement device may comprise a weight measurement module that is mechanically coupled to the handle. The weight measurement module may comprise a force sensor in the handle. The weight measurement module may further comprise a hand grip that is mechanically coupled to the handle. The weight measurement module may further comprise a structure that is connected to both the hand grip and the force sensor， where the structure transfers force from the handle to the force sensor. The force sensor may comprise a load cell.
The body weight measurement device may comprise a weight measurement module， and a weight processing control module comprising a micro-control processing unit (e.g.， a microprocessor or microcontroller) ， wherein the weight measurement module is operably coupled to the weight processing control module and transmits measured weight data to the microprocessor. The child transportation device may comprise a hand basket， and a handle coupled to the hand basket， wherein the body weight measurement device comprises a force sensor that is mechanically coupled to the handle.
The body weight measurement device may comprise a weight measurement module that is operably coupled to a microprocessor. The microprocessor may be configured to determine the weight of the child in the child transportation device. The microprocessor may be operably coupled to at least one of a display unit that is configured to display the weight， and a communication unit that is configured to communicate the weight. The child transportation device may comprise a hand basket， and a handle coupled to the hand basket. The display unit may be on one or both of the hand basket and the handle. The communication unit may be configured to transmit the weight by at least one of short message service (SMS) and Bluetooth. The microprocessor may comprise a weight data processing unit/capability that is configured to calculate the weight of the child by subtracting the empty weight of the child transportation device from the combined weight of the child and the child transportation device. The  microprocessor may comprise a weight judgment unit/capability that is configured to determine if the child transportation device should be replaced based on a comparison of the determined weight of the child to child transportation device weight-range standards.
A child basket provided with a body weight measurement device can comprise a basket body and a basket handle arranged on the basket body， wherein a weight measurement module is arranged on the basket handle. A weight processing control module comprises a microprocessor， and a display unit connected with the microprocessor and used for displaying weight data. The weight measurement module is connected with the weight processing control module and transmits measured weight data to the microprocessor.
Preferably， the weight measurement module comprises one or more pressure sensors used for measuring the basket weight. If a child is in the basket， the measured weight includes the basket plus the child.
Preferably， the microprocessor comprises a weight data processing unit/capability used for determining the child’s weight， and a weight logic judgment unit/capability connected with the weight data processing capability and used for judging whether the basket needs to be replaced or not according to the child’s weight.
Preferably， the weight processing control module further comprises a communication unit which can send child weight information to client sides (i.e.， enabled devices of third-party recipients) ， such as responsible adults， safety authorities， and others.
Preferably， the communication unit comprises a mobile communication unit which can send the child weight information to the client sides in an SMS form， and a Bluetooth and/or RF communication unit which can wirelessly communicate the child weight information to the client sides and to others.
Preferably， the client sides (i.e.， the recipients of the communication from the mobile communication unit) include mobile phone client sides and PC client sides， and child body weight measurement application programs (apps) are present on the client-side devices.
This disclosure has the beneficial effects that the child basket provided with the subject body weight measurement device can accurately measure a child’s weight. Advice as to whether the basket needs to be replaced or not can be made based on review of the calculated weight of the occupied child basket and knowledge of the weight limit range of the child basket. Also， the child weight is tracked and recorded. Sensed weight data， and other car seat system data such as GPS-derived location， and GPS speed， and time， can be logged. Weight data can be sent to client sides through SMS， Bluetooth， and the like.
A child basket provided with the body weight measurement device can comprise a basket body， and a basket handle arranged on the basket body. A weight measurement module can be arranged on the basket handle. There is a weight processing control module arranged on one or both of the basket body and the handle. The weight measurement module is operably coupled to the weight processing control module in any convenient manner. For example， the weight measurement module can be coupled to the weight processing control module through a cable， or wirelessly. The weight measurement module transmits measured weight data to the weight processing control module， and the weight processing control module conducts corresponding operations according to the weight data.
The weight measurement module can include one or more pressure or force sensors， or any other type of sensor from which weight can be determined. The sensor (s) data can be converted into a variable physical quantity of force， namely， weight. Pressure sensors can be piezo-resistive pressure sensors or other types of now-known or future-developed pressure sensors. When a force sensor is used， it can be a load cell， or any other type of now-known or future-developed force sensor. In one specific， non-limiting example， the weight measurement module is arranged in the middle of the basket handle. When the basket is lifted by the basket handle， the sensor/weight measurement module detects the force， which can then be converted to weight by a processor. The weight data can then be input to the weight processing control module for further processing.
The weight processing control module can comprise a microprocessor. There can also be a display unit that is operably connected to the microprocessor. The weight measurement module can input measured weight data to the microprocessor. The microprocessor can  determine the child’s weight. It can also create a message indicating whether the basket needs to be replaced or not， based on the child’s weight. The child’s weight and the message indicating whether the basket needs to be replaced or not can also be displayed on the display unit and/or wirelessly transmitted to third-party recipients.
The microprocessor may comprise a weight data processing unit/capability， and a weight logic judgment unit/capability connected to the data processing unit/capability. The weight data processing unit/capability is configured to process detected weight data and calculate the child’s weight. The child’s weight can be obtained by subtracting weight data measured by the weight measurement module before a child is placed in the basket from the weight data measured by the weight measurement module after the child is placed in the basket. The weight logical judgment unit/capability can be configured to judge whether the basket needs to be replaced by a basket of another type or not， according to the calculated child weight data. The child weight data can also be used to predict or anticipate the need for a larger seat or basket， as the child is about to outgrow the seat. The system can make weight measurements over time and track the trend of weight increase. The trend can be used to determine when the child is about to outgrow the seat， and notify a responsible adult accordingly. In one example， the prediction can be made by extrapolating the weight measurement data trend to the point (the date) where the maximum weight for the current seat will be (or is likely to be) surpassed. Alternatively， the prediction could use standard child weight data (which can be readily obtained from sources such as government databases) to determine an average or typical weight gain per time for an average or typical child with the child’s current weight. The prediction algorithm regarding the child outgrowing the seat is independent of the particular weight sensing devices and methodologies described in this document， and could be used with other weight-sensing devices， technologies， or methodologies.
According to one of many child seat standards， used here for illustrative purposes only， child baskets are classified into four types according to child ages and weights. Type 1： automobile child baskets suitable for children from newborns to children at the age of 15 months (or infants with body weights from 2.2 kg to 13 kg) ； type 2： automobile child baskets suitable for children from newborns to children at the age of four years (or children with body weights from  2.2 kg to 18 kg) ； type 3： automobile child baskets suitable for children from one year to twelve years (or children with body weights from 9 kg to 36 kg) ； type 4： automobile child baskets suitable for children from three years to twelve years (or children with body weights from 15 kg to 36 kg) . The above is but one of many standards that can be used herein； the disclosure is not limited to any standard， any weight ranges， or any number of recommended child transportation devices.
In the examples herein， three types of baskets are used to illustrate an operation of the weight logical judgment unit/capability. As a first step， weight data before a child is placed in the child basket is taken： before the child is placed in the child basket， the weight measurement module obtains the weight data through the pressure sensors， the obtained weight data are recorded as first (i.e.， empty basket) weight data， and the first weight data are output to the weight data processing unit/capability of the microprocessor and stored in the memory associated with the microprocessor. The determination of when the basket is empty can be made in one or more of several manners. For one， the child transportation device can include a user interface that can allow the adult to specify that the seat is empty. Or， this could be done through the mobile device app. Alternatively， multiple temporally-spaced measurements could be reviewed， to find one or more measurements that are substantially lighter than others， indicative of an empty basket. Also， empty basket weights could be secured from the basket manufacturer and saved in device memory， so that empty weight was already known. Secondly， weight data after the child is placed in the child basket is measured： after the child is placed in the child basket， the weight measurement module detects the weight data through the force or pressure sensors， and the detected weight data are recorded as second weight data. The second weight data are output to the weight data processing unit/capability in the microprocessor and stored in the memory associated with the microprocessor. In order to account for irregularities such as the child’s clothing at different times， or toys or other articles that are also carried in the basket along with the child， preferably the child’s weight is determined by combining (e.g.， averaging) more than one weight deterrnination. The data processing unit/capability can work out child weight data according to the weight data obtained by conducting multiple measurements， and the child weight data is input to the weight logic judgment unit. Whether the basket needs to be replaced or not is judged according to the child weight data. The current child weight and a prompt  showing whether the basket needs to be replaced or not can be displayed on the display. All of the data can be logged for other uses. For example， if there is an accident the logged data could be reviewed to determine if the child was in an appropriate seat. If the child was too heavy for the seat， this data could be used as a defense by the seat manufacturer to a claim of liability for injury to the child. Other data sensed by the seat (such as location and time) can also be logged， and reviewed after the fact as needed. For example， such data could be useful in accident forensics.
Specifically， in one illustrative， non-limiting example the current basket is for children up to about 13 Kg. The weight logic judgment unit/capability judges whether the current child weight is greater than 13 Kg or not， and if the current weight is not greater than 13 Kg it indicates that the basket is suitable for the child. If the current weight is greater than 13 Kg， whether the current weight is greater than 18 Kg is further judged. If the current weight is less than 18 Kg， it indicates that the basket is not suitable for the child， and a basket of the second type (13 to 18 Kg) needs to be selected. If the current weight is greater than 18 Kg， it indicates that a basket of the third type (18 Kg and above) needs to be selected.
Preferably， the weight processing control module further comprises a communication unit that is configured to send child weight information to client sides. This child weight information can include one or more of the child weight， a message showing whether the basket is still appropriate for the child， or needs to be replaced， and a prediction of when the child is expected to outgrow the current seat/basket. The message can include a recommendation of the proper size basket for the child’s current weight.
The communication unit may comprise one or both of a mobile communication unit and a Bluetooth communication unit. The mobile communication unit can be configured to send the child weight information to client sides in a short message service (SMS) form， and the Bluetooth communication unit can be configured to wirelessly send the child weight information to the client sides using the Bluetooth standard. Data can also be sent by radio frequency (RF) or any other now-known or future-developed wireless transmission standard. The client sides can include mobile phone client sides and PC client sides， for example. Child body weight management application programs (Apps) can be arranged on the client sides so as to be able to  further analyze the child weight data to generate charts and the like， which can simplify display， tracking， and recording of the child weight data. Weight data tracking over time by the app can be useful for a variety of purposes. For example， medical professionals can use tracked weight data to help care for the child.
The body weight measurement device can also include a power management unit， which can be operably connected to the microprocessor， the display unit， and the communication unit. Power management is a standard function that can be useful to help maintain proper operation of the microprocessor， the display unit， and the communication unit.
In an alternative embodiment， the body weight measurement device can be arranged on the bottom of the child basket and still be used for measuring child’s weight after a child is placed in the child basket. For example， one or more weight or pressure sensors could be located underneath the lower cushion of the car seat， inside of the hard outer shell of the seat. An advantage of this location is that the seat does not need to be lifted in order to determine the child’s weight. Also， such pressure sensor (s) can be used as presence detectors that can determine if a child is present in the car seat.
The child transportation device provided with the body weight measurement device is also suitable for other child carrying devices/seats such as but not limited to a child safety seat， a child stroller， and a bicycle street. The body weight measurement device can be arranged on the child safety seat or the child stroller or the bicycle street to detect whether the child safety seat or child basket is suitable for a child or not and to send out a warning message when the child safety seat or child basket is not suitable for the child.
A child basket provided with the present body weight measurement device is able to accurately determine the weight of a child located in the child basket. It is also able to determine whether the basket needs to be replaced or not， based on the child’s weight. Also， the child’s weight can be tracked and recorded， which can be accomplished by sending information to client sides through SMS， Bluetooth， and the like.
Specific， non-limiting examples of the child transportation device weight sensing are shown in the drawings. These examples serve to illustrate features and concepts， but do not limit the scope of the disclosure.
Fig. 1 illustrates an exemplary child transportation device (child seat) 100 that comprises hand basket 1 that is adapted to fit an infant or child， with pivoting carry handle 12. As is well-known， the basket can be carried by grasping the handle and lifting the basket off the ground or other surface on which the child seat is located. Basket 1 can be releasably coupled to base 2. In general， child seats are known in the art， so certain details of the seat will not be described herein. As best shown in figs. 2A and 2B， basket 1 includes shell 6 with front portion 4， rear portion 3， and lower rear portion 5. As shown in fig. 3， basket 1 can also be removably mounted to stroller frame 30 to create a child stroller 300. This disclosure is not limited to any particular type of child transportation device， or to any particular type of child seat or basket， as the disclosure relates to weight sensing in a child transportation device.
Fig. 4 details functions in one non-limiting example of a body weight measurement device for the child transportation device. Body weight measurement device 40 includes weight measurement module 50 that is placed such that it is able to sense either the weight of the child located in the child transportation device， or the combined weight of the child and the child transportation device. Placement details are set forth elsewhere. Weight data from weight measurement module 50 are provided to microprocessor 42. Microprocessor 42 also controls optional display unit 44 and commtmication unit 46. Display unit 44， when present， can be located in a desired location on the exterior shell of the child transportation device. Power management unit 48 provides power to microprocessor 42， display unit 44， and communication unit 46， and also may provide power to the other functional units， not shown.
A child seat 60 is shown in a rear view in fig. 5. Child seat 60 has rear surface 62 with cavity-type hand-hold 68. Note that child’s head 66 is visible in fig. 5， as is pivoting basket handle 64.
Fig. 6 is an enlarged， partial view of part of child transportation device handle 107 which includes a specific， non-limiting version of weight measurement module 90. Handle 107 includes inner handle portion 106 and outer handle portion 108， which are mechanically coupled  together by any convenient or conventional mechanical structure， not shown here. Force sensor 101 is built into handle 107 and comprises load cell 102 fixed to beam 104. Beam 104 is mechanically coupled to handle 107， such as via  standoffs  113 and 114. Hand grip 110 is located just below handle portion 106， and placed such that an adult’s palm/fingers will normally press up against hand grip 110 (in the direction of arrow “A” ) when the child transportation device is lifted by the handle. Mechanical structure 112 mechanically couples hand grip 110 to the underside of beam 104， or at a minimum is configured to transfer force from hand grip 110 to beam 104. As a result， when the child transportation device is lifted， force is placed on hand grip 110. This force is coupled to beam 104 by structure 112. The force causes beam 104 to deflect. The deflection is sensed by load cell 102. Load cell 102 has an output signal that is provided to printed circuit board (PCB) 120， which can be located in or on the handle， or in or on any other part of the child transportation device. PCB 120 can include amplifiers， conditioning electronics or other electrical/electronic components that are involved in determining the weight of the child transportation device based on the signals from load cell 102. All of the functionality necessary to determine the weight， and to make judgments of appropriate sizes of child transpiration devices based on the sensed weight of the child， can be located anywhere on or in the child transportation device. In one non-limiting example， the electronics (depicted functionally in fig. 4) are located on one or more small PCB (s) that are located in the handle. Multiple PCBs can be electrically connected by cables. Wireless communication schemes such as Bluetooth Low Energy (BLE) or other now-known or future-developed schemes can alternatively or additionally be used for inter-board/inter-device communication.
In one non-limiting example， load cell 102 can be a CZL700D strain-gauge type load cell available from Dongguan Uchi Electronics Co.， Ltd.， Samsung Industrial Park， Yucai Road， Jinju， Dalingshan， Dongguan， Guangdong， China (523820) . Strain-gauge load cells convert the load acting on them into electrical signals. The measuring is done with very small resistor patterns called strain gauges -effectively small， flexible circuit boards. The gauges are bonded onto a beam or structural member that deforms when weight (force) is applied， in turn deforming the strain-gauge. As the strain gauge is deformed， its electrical resistance changes in proportion to the load. The particular device selected should be able to measure weights that include the weight values for the particular car seat， or the various types of car seats as discussed elsewhere  herein. A 24-bit digital value can be read from the load cell via an analog to digital converter. The value can be read when the seat is empty and the child seat is being held by the handle in a normal manner. The weight with a child present is also sensed in the same way. A “normal” manner can be determined in a desired fashion. For example， if the force is inconsistent， it could be that the person is walking with the car seat and the seat is slightly bouncing and thus adding to/subtracting from the actual force as the seat moves up and down. Also， grip strength could have an effect on force sensing. If the force is too high (e.g.， the sensor is in saturation) ， the measurement could be ignored. In cases of such spurious measurements， the system could also send a wireless message to the user (e.g.， via BLE to the mobile device with the app) to carry the seat in a gentler manner. Also， since measurements can be taken quite frequently given the particular sensors and processors used， the system can continuously average the readings， to help account for inconsistencies due to the manner in which the handle is held and the like. Also， outlier values can be ignored， as the weight of a child will naturally change very slowly as compared to the speed at which measurements can be taken.
Other types of load cells or strain gauges， or other types of force or weight-measurement devices can be used herein， as the disclosure is not limited to any particular manner or means of sensing weight. As one non-limiting example， a strain sensor can be used， such as the BF350-3AAA strain sensor from AGS-Tech， Inc.， of Albuquerque， New Mexico， USA. A strain sensor can be mounted on a thin ceramic tile to which the load force is applied such that the tile bends under the applied force. Weight can be determined from the strain sensor output. Also， the location of the force sensor/weight measurement module in the handle is not a limitation， as the weight of the child basket plus child can be determined by a weight sensor located elsewhere in the child transportation device. As another alternative， the weight of the child (separately from the weight of the child basket) can be sensed by placing one or more appropriate sensors directly underneath the child， such as underneath the cushion on which the child rests.
Force and weight measurement devices that can be used herein to measure weight are well known in the field and so are not further described in detail herein.
Fig. 7 is a flow chart of the operation of a weight judgment functionality 70 for the child transportation device weight sensing herein. In this non-limiting example， weight judgment  functionality 70 is accomplished using microprocessor 42. The weight judgment functionality 70 is configured to determine if a child transportation device should be replaced because the child weighs too much for the current device， and/or to predict when the device or seat or basket will likely need to be replaced. This determination can be based on any now-known or future-developed local， regional， national， or international standard， or based on any other information. In the present non-limiting example， weight judgment functionality 70 is able to judge whether the child’s weight meets any one of three weight ranges that are predetermined and stored in memory associated with microprocessor 42， such as the ranges described above. In the first step 72 the weight measurement module collects data. This data is passed to the microprocessor， step 74， where the child’s weight is determined， as described above. The current weight can then be compared to two weight standards. If the weight is less than the first (the lowest) weight standard， step 76， the judgment is to keep the current basket， step 78. The judgments are typically outputted to a responsible adult via one or both of the display unit 44 and the communication unit 46. If the weight is greater than the first limit， at step 80 the weight judgment functionality determines if the weight is above a second， higher limit. If it is not， then the judgment is to recommend the next larger basket， step 82. If the weight is greater than the second limit， the judgment is to recommend the third (the largest) basket， step 84. Weight tracking and logging can be used to predict that a child is close to outgrowing the seat， as described above. This can afford a parent time to obtain the next largest size before the child actually outgrows the current seat.
Obviously， the weight judgment functionality can be based on one， two， three， four， or more weight limits， as desired， or as necessary to meet the appropriate standard being followed.
Elements of figures are shown and described as discrete elements in a block diagram. These may be implemented as one or more of analog circuitry or digital circuitry. Alternatively， or additionally， they may be implemented with one or more microprocessors executing software instructions. The software instructions can include digital signal processing instructions. Operations may be performed by analog circuitry or by a microprocessor executing software that performs the equivalent of the analog operation. Signal lines may be implemented as discrete  analog or digital signal lines， as a discrete digital signal line with appropriate signal processing that is able to process separate signals， and/or as elements of a wireless communication system.
When processes are represented or implied in the block diagram， the steps may be performed by one element or a plurality of elements. The steps may be performed together or at different times. The elements that perform the activities may be physically the same or proximate one another， or may be physically separate. One element may perform the actions of more than one block.
A number of implementations have been described. Nevertheless， it will be understood that additional modifications may be made without departing from the scope of the inventive concepts described herein， and， accordingly， other embodiments are within the scope of the following claims.

Claims (20)

  1. A child transportation device， comprising：
    a child seat comprising a hand basket， and a carrying handle coupled to the hand basket； and
    a body weight measurement device that is constructed and arranged to determine the weight of a child in the hand basket， wherein the body weight measurement device comprises a weight measurement module that is mechanically coupled to the handle.
  2. The child transportation device of claim 1， wherein the weight measurement module comprises a force sensor in the handle.
  3. The child transportation device of claim 2， wherein the weight measurement module further comprises a hand grip that is mechanically coupled to the handle.
  4. The child transportation device of claim 3， wherein the weight measurement module further comprises a structure that is connected to both the hand grip and the force sensor， where the structure transfers force from the hand grip to the force sensor.
  5. The child transportation device of claim 2， wherein the force sensor comprises a load cell.
  6. The child transportation device of claim 1， wherein the body weight measurement device comprises a weight measurement module and a weight processing control module comprising a microprocessor， wherein the weight measurement module is operably coupled to the weight processing control module and transmits measured weight data to the microprocessor.
  7. The child transportation device of claim 1， wherein the weight measurement module comprises a force sensor that is mechanically coupled to the handle.
  8. The child transportation device of claim 1， wherein the weight measurement module is operably coupled to a microprocessor.
  9. The child transportation device of claim 8， wherein the microprocessor is configured to determine the weight of the child in the child transportation device.
  10. The child transportation device of claim 9， wherein the microprocessor is operably coupled to at least one of a display unit that is configured to display the weight， and a communication unit that is configured to communicate the weight.
  11. The child transportation device of claim 10， wherein the display unit is on one or both of the hand basket and the handle.
  12. The child transportation device of claim 10， wherein the communication unit is configured to transmit the weight by at least one of short message service and Bluetooth.
  13. The child transportation device of claim 9， wherein the microprocessor comprises a weight data processing functionality that is configured to calculate the weight of the child by subtracting the empty weight of the child transportation device from the combined weight of the child and the child transportation device.
  14. The child transportation device of claim 9， wherein the microprocessor comprises a weight judgment functionality that is configured to determine if the child transportation device should be replaced based on a comparison of the determined weight of the child to child transportation device weight range standards.
  15. The child transportation device of claim 1， further comprising a prediction function， responsive to the weight of the child in the hand basket， that is configured to predict that the child is going to outgrow the hand basket.
  16. The child transportation device of claim 15 further comprising a notification function， responsive to the prediction function， that is configured to wirelessly transmit a notification of the prediction.
  17. A child transportation device， comprising：
    a child seat that comprises a hand basket， and a handle coupled to the hand basket； and
    a body weight measurement device that is constructed and arranged to determine the weight of a child in the hand basket；
    wherein the body weight measurement device comprises a load cell in the handle， and a hand grip that is mechanically coupled to the handle by a structure that transfers force from the hand grip to the load cell.
  18. The child transportation device of claim 17， wherein the body weight measurement device comprises a microprocessor that comprises a weight data processing functionality that is  configured to calculate the weight of the child by subtracting the empty weight of the child transportation device from the combined weight of the child and the child transportation device.
  19. The child transportation device of claim 18， wherein the microprocessor comprises a weight judgment functionality that is configured to determine if the child transportation device should be replaced based on a comparison of the determined weight of the child to child transportation device weight range standards.
  20. The child transportation device of claim 19， further comprising：
    a prediction function， responsive to the weight of the child in the hand basket， that is configured to predict that the child is going to outgrow the hand basket； and
    a notification function， responsive to the prediction function， that is configured to wirelessly transmit a notification of the prediction.
PCT/CN2017/101455 2016-09-12 2017-09-12 Child transportation device weight sensing WO2018046018A1 (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
CN201621050502.6U CN206141378U (en) 2016-09-12 2016-09-12 Children's safety seat with bluetooth
CN201610817633.0 2016-09-12
CN201621050426.9 2016-09-12
CN201621050426.9U CN206049417U (en) 2016-09-12 2016-09-12 Child safety seat with child's monitoring
CN201621050384.9 2016-09-12
CN201610817633.0A CN106314211A (en) 2016-09-12 2016-09-12 Child safety seat monitoring device and control method thereof
CN201621050502.6 2016-09-12
CN201621050384 2016-09-12

Publications (1)

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WO2018046018A1 true WO2018046018A1 (en) 2018-03-15

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Citations (10)

* Cited by examiner, † Cited by third party
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US20080143544A1 (en) * 2006-12-13 2008-06-19 Luis Robles-Figueroa Infant safety seat and alarm systems
CN201617315U (en) * 2010-01-15 2010-11-03 深圳市蓝特电子有限公司 Carrying handle with weighing function
CN103038615A (en) * 2010-04-30 2013-04-10 彼得·帕尔默 Handle
CN104802669A (en) * 2014-01-27 2015-07-29 姜博仑 Multifunctional safety seat
CN105416370A (en) * 2015-12-16 2016-03-23 昆山威凯儿童用品有限公司 Portable baby instrument with weighing function
CN106314211A (en) * 2016-09-12 2017-01-11 苏州纪宝儿童用品有限公司 Child safety seat monitoring device and control method thereof
CN206049418U (en) * 2016-09-12 2017-03-29 苏州纪宝儿童用品有限公司 child safety seat monitoring device
CN206049417U (en) * 2016-09-12 2017-03-29 苏州纪宝儿童用品有限公司 Child safety seat with child's monitoring
CN206141378U (en) * 2016-09-12 2017-05-03 苏州纪宝儿童用品有限公司 Children's safety seat with bluetooth

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050275258A1 (en) * 2004-06-07 2005-12-15 Patterson James F Child restraint system and method for monitoring installation of the child restraint system
US20080143544A1 (en) * 2006-12-13 2008-06-19 Luis Robles-Figueroa Infant safety seat and alarm systems
CN201617315U (en) * 2010-01-15 2010-11-03 深圳市蓝特电子有限公司 Carrying handle with weighing function
CN103038615A (en) * 2010-04-30 2013-04-10 彼得·帕尔默 Handle
CN104802669A (en) * 2014-01-27 2015-07-29 姜博仑 Multifunctional safety seat
CN105416370A (en) * 2015-12-16 2016-03-23 昆山威凯儿童用品有限公司 Portable baby instrument with weighing function
CN106314211A (en) * 2016-09-12 2017-01-11 苏州纪宝儿童用品有限公司 Child safety seat monitoring device and control method thereof
CN206049418U (en) * 2016-09-12 2017-03-29 苏州纪宝儿童用品有限公司 child safety seat monitoring device
CN206049417U (en) * 2016-09-12 2017-03-29 苏州纪宝儿童用品有限公司 Child safety seat with child's monitoring
CN206141378U (en) * 2016-09-12 2017-05-03 苏州纪宝儿童用品有限公司 Children's safety seat with bluetooth

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