JPH0450730A - Body weight measuring instrument - Google Patents

Abstract

PURPOSE:To record measurement data automatically by sticking a strain gauge on a sending column interposed between a base and a pedestal, and calculating a load value from its detection signal and storing it on an IC card. CONSTITUTION:When a person steps on the pedestal 12, the sensing column 18 receives a compressive load to generate compressive strain, which is detected by the strain gauge 20and inputted to a converting circuit 22. This is displayed as a body weight value on a display device 44 through an arithmetic unit and also recorded on the IC card at the same time together with its measurement date. Consequently, the measurement data can be recorded automatically.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a weight measuring device, and more particularly to a weight measuring device having an automatic recording function and a weight measuring device capable of managing recorded data.

[Conventional technology and its problems]

Conventional weight scales have a mechanical measuring structure, and usually use springs to measure weight. This method was used to check the weight value by directly looking at the scale, and was mainly used to check the weight each time it was measured. However, conventional weighing scales cannot automatically record daily data, so they have not been used effectively. Additionally, mechanical weighing scales have many moving parts and have problems with reliability and durability. The present invention focuses on the above-mentioned conventional problems and aims to provide a weight measuring device that can automatically record weight measurement data.

[Means to solve the problem]

In order to achieve the above object, the weight measuring device according to the first invention includes a strain gauge attached to a sensing column interposed between a base and a pedestal, and a detection signal from the strain gauge. It has a conversion means for calculating a proportional load value, and this conversion means outputs the calculated load value to an IC card serving as an external storage means so that it can be stored in memory. Further, the weight measuring device according to the second invention includes a strain gauge attached to a sensing column interposed between the base and the pedestal, and a load value proportional to the detection signal from the strain gauge. It has a weight scale equipped with a conversion means for calculating, a transmission means connected to the conversion means and transmitting the calculated data, a reception means for receiving the transmission data, and an IC card is removable for inputting the received data. The configuration includes a card read/write device. r Effect] According to the first invention, the weight can be stored and held in the IC card each time the weight is measured, and the past weight can be read out using an external card reader. Therefore, it is no longer necessary to manually record each measurement, which was conventionally required, and weight management can be easily realized. In addition, according to the second invention in which the weight scale and the cart reader are separated and communicated by a transmitter/receiver, the inconvenience of attaching an IC card to the lower weight scale is eliminated, and the IC card can be used as a handy type memory function unit. Handling becomes much easier. and,
In both inventions, the measured values are stored in the IC card, so it is possible to read the stored data using a separately installed computer and output action instructions for weight management using an arbitrary program. It can be done.

【Example】

Hereinafter, specific embodiments of the weight measuring device according to the present invention will be described in detail with reference to the drawings. FIGS. 1 and 2 show an embodiment of a weight measuring device according to the first invention. As shown in the figure, the weight measuring device 10 according to this embodiment includes a main body 16 in which a load receiving side pedestal 12 and a base 14 placed on the floor are formed into a container shape. A sensing column 18 is provided within the main body 16, and is located between the pedestal 12 and the base 14 so as to generate compressive stress by receiving a load from the pedestal 12 side. A strain gauge 20 is attached to the side surface of the sensing column 18 to detect the compressive stress. This is a bridge circuit consisting of four gauges, with each gauge located at ±4 points along the axis of the sensing column 18.
It is attached closely to the side surface of the support column 18 so as to have an inclination angle of 5 degrees, and the strain that occurs when the support column 18 receives a compressive load is detected. A conversion circuit 2 that inputs the strain signal of the sensing column 18 proportional to the weight received by the pedestal 12 into the strain gauge 20, and outputs this as a voltage change.
2 are connected. As shown in FIG. 2, this circuit 22 is provided with an amplifier circuit 24 that inputs the detection signal of the strain gauge 20. Power is being supplied. The signal amplified by the amplifier circuit 24 is output to the demodulation circuit 34, and the signal is output to the oscillation circuit 36.
The detection signal is demodulated by receiving an input signal from the sensor. The demodulated signal is supplied to a power amplifier circuit 40 via a filter circuit 38, and the detection signal from the gauge 18 is output as a voltage change. The weight signal output in this way is further output to an arithmetic unit 42 consisting of a microcomputer, where it is A/D converted into a digital signal, which is directly converted into a weight value and used in the weight measuring device 10. A digital display is provided on a display meter 44 provided on the base 12. Here, the arithmetic unit 42 has an I/O device as an external storage device.
A connection port for the C card 46 is provided and an attached IC
Weight value data as a calculation result is output to the card 46 and stored therein. In this case, the arithmetic unit 42 is equipped with a timer so that the measurement date and time are recorded at the same time. Therefore, each time a measurement is performed, the measurement date and time and the weight value at that time are simultaneously recorded on the IC card 46. In the weight measuring device 10 configured in this way, when a person stands on the pedestal 12 for measurement, the sensing column 18 receives a compressive load and generates compressive strain. This minute strain is detected by the strain gauge 20 and input to the conversion circuit 22. This signal is converted into a voltage change by an internal circuit, and the weight value is directly displayed on the display meter 44 by the arithmetic unit 42, and at the same time, this value is recorded on the IC card 46 along with the date and time of measurement. Therefore, the weight measuring device 10 itself directly records the weight on the IC card 46 and stores it as data, without the need for the measurer to record his or her own weight. The IC card 46 may be read by a card league of a separately provided computer, and any program installed therein may output action instructions for graph processing and medical management. FIG. 3 shows an external configuration diagram of a weight measuring device 10A according to a second embodiment. A transmitter 48 is provided on the output side of the arithmetic unit 42 in the conversion circuit 42 of the scale body 16, and a read/write device 5O for the 1c card 46 is provided separately from the scale body 16. This configuration includes a receiver 52 that is paired with the receiver 48. The receiver 52 outputs data from the main body 16 to the read/write device 50, and writes and records the received data on the IC card 46. The other configurations are the same as in the first embodiment. According to the second embodiment, the IC card 46 can be inserted into and removed from the read/write device 50 at hand, which has the advantage of making handling operations easier.

【Effect of the invention】

As explained above, according to the weight measuring device according to the present invention, the measured value of the weight is automatically recorded on the IC card, so that the weight can be recorded periodically without handwriting, and the weight can be managed. can be performed reliably and organically, and the recorded data can be applied to appropriate medical management through computer processing.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional configuration diagram of a weight measuring device according to a first embodiment;
Figure 2 is a circuit configuration diagram of the conversion circuit of the same device, and Figure 3 is the circuit diagram of the conversion circuit of the same device.
FIG. 1 is an external configuration diagram of a weight measuring device according to an example. 10, IOA... weight measuring device, 12...
...Base, 14...Base, 16...Weight scale body, 22...Conversion circuit, 46...
・IC card. Figure 1

Claims (1)

[Claims] 1) A conversion means for attaching a strain gauge to a sensing column interposed between a base and a pedestal and calculating a load value proportional to a detection signal from the strain gauge. This conversion means stores the calculated load value in I as an external storage means.
A weight measuring device characterized in that it can output data to a C card and store it in memory. 2) A strain gauge affixed to a sensing post interposed between the base and the pedestal, a conversion means for calculating a load value proportional to a detection signal from the strain gauge, and a conversion means for this conversion means. It has a weighing scale connected to a transmitting means for transmitting calculated data, and is composed of a receiving means for receiving transmitted data, and a card read/write device for inputting this received data and capable of attaching and removably attaching an IC card. A weight measuring device characterized by: