JPS5819973B2 - automatic height and weight scale - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a height and weight scale that is particularly effective in mass examinations and basal metabolic rate measurements conducted as part of health management. This invention relates to an automatic height and weight scale configured to simultaneously measure height and weight, and to digitally display and print these measured values together with the measurement date and identification number (ID, N01).

Measuring height and weight is important in health management as a barometer to know the level of health, and is necessary for measuring basal metabolic rate, but because it is so easy to measure, there is no need to automate it. This is not necessary and therefore separate hand-measured height and weight scales have continued to be used.

However, as the number of test subjects and patients undergoing group medical examinations and basal metabolic rate measurements has recently increased significantly, it is now possible for test subjects to take measurements themselves without the help of staff as in the past. In addition, there has been a need to digitally display and print out the measured values, or to automatically input them into a computer or the like.

In order to meet the above demand, an automatic height and weight scale has been proposed, for example, in Japanese Patent Publication No. 53-2583, which is capable of simultaneously measuring height and weight in one operation, which were previously measured separately.

These height and weight scales are composed of a measuring system main body and a display controller, and the measuring system main body has a height scale frame body and a weight measuring mechanism including a weight detection plate separately installed on the measuring machine frame. , A display controller that digitally displays the measured values of the height scale and weight scale and controls the two hands is installed at a position facing the height scale frame on the underframe, or separately near the measuring system body. It was installed in

However, with these conventional height and weight scales, the height scale is installed in a separate position from the weight detection plate, so when measuring weight, measurement errors are likely to occur due to factors such as the weight of the backrest and the height detection plate on the height scale. Alternatively, since a mechanical detection method or a potentiometer is used to measure body weight, there is a drawback that measurement errors are large and high accuracy is not guaranteed, as described above.

In addition, since height meters use microswitches to detect height, errors are likely to occur due to the stroke of the microswitch or detection pressure, and high accuracy cannot be guaranteed, as in the case of weight measurement. There are drawbacks.

Furthermore, it lacks a device to preset the measurement date and identification number of the patient, etc. on the display board, a text instruction device to prevent malfunctions of the patient, etc. during measurement, and a device to print various data. There are some unsatisfactory points in terms of performance as a measuring device.

The present invention has been made to solve the above-mentioned drawbacks and unsatisfactory points, and one embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the overall arrangement of an automatic height and weight scale according to the present invention, in which reference numeral 1 designates an underframe, 2 a weight detection plate, and 3 a height scale.

The height gauge 3 is formed by directly connecting an upper frame part 4 and a lower leg tube (detection part) 5, and is fixed upright on the right end of the weight detection plate 2.

A weight scale leg tube (weight detection unit) 6 is formed on the pressed copper facing the height scale 3 of the underframe 1, and above it is a housing (display and measurement control unit) that houses a printer 7. 8 is placed thereon, and a display/operation section (panel) 9 is attached to the top surface of the casing 8.

In the height and weight scale configured as described above, the examinee stands on the footprint 10 of the weight detection plate 2 with his/her back to the height scale 3 and in close contact with it, thereby measuring height and weight at the same time. The measured values are displayed on the display/operation unit 9 and recorded by the printer 7, the details of which will be described later.

In addition, 25 is a caster for movement, 26 is a fixture for stationary use, and 27
is a spirit level attached to the left end of the weight detection plate 2.

Next, the height meter 3 is constructed as follows.

In FIGS. 2 and 3, a through groove 11 is vertically bored in the inner surface of the frame 4, and a guide is provided in the through groove 11 so as to be able to slide freely along the hole 11. A member 12 is inserted, and a mounting piece 13 for mounting a height detection plate 14 is fixed.

Further, the guide member 12 is driven by a rope 15 via a pulley 16 of a height measuring drive device installed in the height meter leg part 5.

The height detection method uses an autobalance electronic detection method instead of attaching a microswitch to the height detection plate as in conventional models, and uses a 10-turn potentiometer as the measurement sensor, and the measurement range is 9
It is 0.0 to 200.0 CIrL.

In addition, the measurement error is approximately ±0.5CIrL for the conventional model, while F
It is ±2mm, which is ±0.1% of ull 5cale.

FIG. 4 is a schematic explanatory diagram showing a height measuring drive device installed in the height meter leg 5, in which the pulley 16 is connected to the powder clutch 18 and the input shaft 20 and output shaft 20, which are directly connected to the powder clutch 18, respectively. It is rotated forward and backward by a motor 19 to move the height detection plate 14 up and down along the through groove 11.

Moreover, the potentiometers 23A, 23B and 23C are
It is driven by gears 21 and 22 fixed to shafts 20 and 20, respectively.

Now, when the person to be examined stands on the foot print 10 of the weight detection plate 2 and steps on the two foot switches 24 at the heel, the motor 19
is activated.

This is to ensure that the posture and position of the examinee is correct before taking measurements, and also to allow the examinee to measure himself/herself.

When the motor 19 is started and the pulley 16 is rotated via the powder clutch 18, the height detection plate 14 is lowered from its fixed position above, hits the head of the examinee, and stops.

As is well known, the powder clutch 18 is designed to insulate the output shaft 20' from the input shaft 20 when the rotational force of the input shaft 20 exceeds a set value by adjusting the excitation current. , when the height detection plate 14 stops, the pulley 16 also stops, and both shafts 20 and 2 of the powder clutch 18 stop.
0' is disconnected, the input shaft continues to rotate, and the output shaft stops.

Therefore, the rotation of the motor 19 is stopped by detecting the potential difference generated between the potentiometer 23A, which continues to rotate, and the potentiometer 23B, which is stopped.

In FIG. 5, potentiometer RT1 (corresponding to reference numeral 23A in FIG. 4) rotates, and potentiometer RT2 (corresponding to reference numeral 23A in FIG. 4) rotates.
(corresponding to B) stops, the operational amplifier OP
This causes a difference in the input side voltage of 1.

Then, an output signal is obtained which is amplified according to a predetermined amplification factor by the resistors R1 to R4.

In this case, by setting a sufficiently large amplification factor, even if the difference in input side voltage is minute, it can be extracted as an output signal.

The output signal from the operational amplifier OP1 is converted into a digital signal by the Schmitt trigger circuit, and this output signal causes the display and measurement control unit 8 to issue a signal to stop the rotation of the motor 19 and also to measure height and weight. A signal for automatic switching by the electronic switch S1 and a control signal for displaying the measured values of height and weight on the display/operation unit 9 and causing the printer 7 to print are issued.

Potentiometer PT3 (4th
23C in the figure), the moving distance of the height detection plate 14 (distance from the upper stop position to the top of the examinee's head) is taken as the rotation angle of the potentiometer PT3.

Now, by using a multi-turn potentiometer (10 turns in the example), the resolution (rotation angle corresponding to the moving distance) can be increased.

Since a constant voltage power source is applied to the potentiometer PT3, the rotation angle is given as the input side voltage of the operational amplifier OP2.

Furthermore, the output signal amplified by the resistors R5 and R6 according to a predetermined amplification factor can be taken out as an analog voltage value that directly indicates the height.

This analog voltage is converted into a digital signal by an A/D converter, which then provides a display command and a command to cause the printer to print via a printer drive circuit.

In addition, in FIG. 5, the resistors indicated by R11 to R14 are connected to the respective operational amplifiers OP1 and OF2.
This is a bias resistor that provides current to the

Next, the weight detection method uses a load cell instead of using a mechanical detection method or a potentiometer like conventional weight scales, and the measurement range is 10.0 to 120.0.
kg.

In addition, the measurement error is approximately ±0.5 kg for the conventional model, whereas the Fu
±0.1 which is ±0.125% of ll 5cale
It is 5ky.

The configuration of the scale is as follows.

In FIG. 6, the weight detection plate 2 is placed on top of a stacking rod type weight measurement mechanism 28 housed within the underframe 1. As shown in FIG.

The weight measuring mechanism 28 includes a detection plate receiving frame 29 and stacking rods 30 and 31.
Consists of etc.

The stacking rod 31 has both ends suspended from the stacking rod 30 and the underframe 1 by hooks 33 and 34, respectively, and the stacking rod 30 has both ends suspended from the underframe 1 by hooks 32 and 35, respectively.
and is suspended from the lower end of the load cell 36.

In the stacking rod type weight measuring mechanism 28 having the above configuration, the weight applied to the weight detection plate 2, that is, the detection plate support frame 29, is applied to the fulcrum 37 of the stacking rod 30 and the fulcrum 38 of the stacking rod 31. By detecting the reaction force applied to the hook 35 in this case using the load cell 36 directly connected to the hook 35, the weight of the subject on the weight detection plate 2 can be measured.

However, in this case, it goes without saying that the total weight of the height gauge should be subtracted from the above measurement value.

The upper end of the load cell 36 is appropriately suspended from the inner surface of the top plate of the scale leg cylinder 6 by a fixture (not shown).

Again, in FIG. 5, the input voltage to the operational amplifiers OP3 and OF2 detected by the load cell 36 is amplified by resistors R7 to R9 according to a predetermined amplification factor, and the analog output signal is amplified by the A/D converter. The weight is converted into digital data, and the weight is displayed and printed in exactly the same way as when measuring the height.

All of the above-mentioned height, weight, and operation instructions in text at the time of measurement described below are displayed on the display/operation section 9 and are displayed on the display and measurement control section 8.
This is done by order from the government.

FIG. 7 shows the display/operation section 9, in which various operation keys and switches are arranged, as well as ■D,
Equipped with NO, preset keys, ID, NO8 display (4-digit display), date setting switch, etc.

Among these, the ID, NO, and preset keys are devices for setting the identification number of the examinee, etc. Once set, the numbers are displayed and printed in sequence, but each digit has its own number. A switch is attached that allows you to freely change only the numbers, allowing you to preset any four-digit number.

Height is a 4-digit number including one decimal place (unit: cIrL)
), and the weight is a 4-digit number including one decimal place (
Displayed and printed in units of kg.

Operation instructions to prevent malfunctions during measurement include 1. Please get on the vehicle,""Please do not move," and "Please get off the vehicle."
3 types of characters (lamp lights up on the corresponding display character)
is displayed.

The function of the automatic height and weight scale according to the present invention is as follows.

When the power switch is turned on and a suitable period of time has elapsed, a sign reading "Please ride" is lit on the display/operation unit 9, indicating that measurement preparations are complete.

When the examinee climbs up onto the weight detection board 2, stands upright, and steps on the foot switch 24 on the foot print 10, a sign with the words "Please do not move" is illuminated.

Then, after 2 to 3 seconds, the height detection plate 14 starts to descend, and if it hits the head and stops, the measurement ends at this point, and the height detection plate 14 rises and returns to its original position. Return.

During this time, the height and weight are digitally displayed on the display/operation unit 9, and the text sign "Please get off" is lit.

When the examinee, etc. gets off the weight detection board 2, the measurement of the examinee's height and weight is completed, and the display/operation unit 9 lights up again with the text sign "Please get on." be done.

Further, the measurement year/month ratio identification number, height, and weight are printed on recording paper by the printer and sent to the outside.

As described above, according to the automatic height and weight scale of the present invention, the display and
It is possible to measure the height and weight of the examinee himself/herself by following the operation instructions given by the text signs on the operating section 9, and the accuracy is extremely high, and the measured values are displayed digitally along with the measurement date and identification number. It is also printed on the recording paper.

In addition, if necessary, we will provide an interface for online connection to an electronic calculation system, a device for registering ■D and NO0 from ID and card readers, and furthermore, calculate standard weight from height and weight values, and calculate obesity level. It is also possible to attach a device etc. that presents the information.

As described above, the automatic height and weight scale of the present invention is particularly effective when measuring a large number of examinees, such as in group medical examinations, without relying on the help of a measurer as in the past. It is extremely beneficial for health management.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view showing the overall arrangement, Fig. 2 is a front view of the height scale frame, Fig. 3 is a sectional view of the same side, and Fig. 4 5 is a schematic explanatory diagram showing the height measuring mechanism, FIG. 5 is an electric circuit diagram for height and weight measurement, FIG. 6 is a side sectional view of the weight measuring mechanism, and FIG. 7 is a plan view of the display/operation section. 1...Underframe, 2...Weight detection plate, 3.
... Height meter, 9 ... Display/operation section, 14
... Height detection plate, 16 ... Pulley, 1
8... Powder clutch, 19... Motor, 23A, 23B, 23C... Potentiometer, 28... Weight measuring mechanism, 29...
...Detection plate receiving frame, 30, 31...Pile rod, 32~
35... Hook, 36... Load cell, 37, 38... Fulcrum.

Claims (1)

[Scope of Claims] 1. In an automatic height and weight scale in which a height scale and a weight scale are installed on the same frame, height and weight are measured simultaneously through a single measurement operation, and the measured values are digitally displayed, (a) weight. a leg tube that is fixed upright on one end of the detection plate;
A frame directly connected to the upper part of the leg tube, a height detection plate that is slidably moved up and down by a rope via a pulley along a through groove drilled inside the frame, and a height detection plate that is connected to the above via a powder clutch. It consists of a drive device that rotates the pulley in the forward and reverse directions, and three potentiometers driven by the gear mechanism of the drive device. Two of the potentiometers are used as inputs to the powder clutch to stop the motor after height detection. One each is placed on the shaft side and one on the output shaft side, and one is placed on the output shaft side of the powder clutch for measuring height.
The measured value is A-D converted and displayed in digital form, and further,
A height meter configured to print; (b) a weight detection plate with the height meter fixed upright at one end; a receiving frame that is housed in a frame and on which the weight detection plate is placed; a horizontal rod, a hook, etc. Weight is measured using a stacking rod type weight measuring mechanism and a load cell installed at one end of the horizontal rod that detects the reaction force due to the weight applied to the weight verification plate, and the measured value is converted from A to D. A weighing scale configured to display digitally and print it out; e→ Subject's identification number (ID, NO,) preset key and display device; a date setting switch; and a device to prevent malfunctions during measurement. An automatic height and weight scale characterized by comprising: a display/operation unit equipped with an illuminated operation instruction device using characters for use.