JPH0821721A - Range finder - Google Patents

Abstract

PURPOSE:To provide a range finder having a simple structure and being capable of measuring distance while using an arbitrarily set place as a reference and having excellent accuracy. CONSTITUTION:An ultrasonic distance sensor or a photosensor 1 and a reflecting plate 4 reflecting a detecting wave emitted from the sensor 1 are provided. The reflecting plate 4 can be moved freely between an article to be measured and the sensor 1, a signal detected between the sensor 1 and the reflecting plate 4 is converted into a distance to be measured actually such as height of the article to be measured from the ground surface while using a set place input by a numeric input device 6c as a reference value by a converter 6a, and the distance is displayed on an electrical display section 6.

Description

Detailed Description of the Invention

[0101]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distance detector using an ultrasonic sensor.

[0092]

2. Description of the Related Art First, an outline of a conventional distance detector will be described. Conventionally, when measuring the height of a cow's body at a cow's abandon, the distance from the ground is measured by placing a ruler as shown in Fig. 4. At this time, the cow is very disliked and the measurement takes time. Further, in order to display the measured data on the electronic bulletin board, the work of inputting into a computer or the like occurs.

Further, in a height meter conventionally used in schools, public health centers, hospitals, etc., a measuring plate is placed on the head of the person to be measured, and the scale of the place has the eyes at almost the same height. The person who reads the text does not read it accurately unless he is taller than the person to be measured. In addition, the recorder may erroneously write the measurement result read by the measurer. Recently, there is also an automatic height meter using a potentiometer, but since it requires mechanical parts such as belts and gears, it becomes structurally large, and wear and fatigue thereof cause measurement errors and failures.

[004]

The present invention has been made in view of the above problems, has a simple structure, can measure a distance based on an arbitrarily installed position, and can provide a highly accurate distance. The purpose is to provide a measuring instrument.

[0095]

In order to solve the above problems, the present invention uses an ultrasonic sensor or an optical sensor,
The sensor head and a horizontally prepared reflecting plate were made to move freely between the object to be measured, and the detection wave of the sensor was reflected to the detection section under the same conditions. In addition, the detected signal is converted into the distance you actually want to measure, such as the height from the lower part of the DUT by the converter, using the installation position of the measuring device that was input in advance as a reference value, and the distance Is displayed on the electrical display unit.

[0086]

With the above configuration, the detection wave is properly reflected by the reflection plate applied to the object to be measured, and the distance between the object to be measured and the sensor head can be accurately measured. It is possible to convert the signal into the height or length of the object to be measured according to the purpose and display it on a display or to store data in a computer.

[0097]

Embodiments of the present invention will be described below with reference to the drawings. As Example 1, FIG. 1 shows a state in which normal force is not applied when measuring the body height of a cow. In FIG.
An ultrasonic sensor 1 emits ultrasonic waves or light in the direction of arrow 1a. Reference numerals 2 and 3 are cylinders whose distance from the object to be measured can be adjusted. Reference numeral 4 denotes a reflection plate and a measurement plate, which are attached so as to accurately reflect ultrasonic waves to the detection unit. 6a is a signal converter for converting an analog voltage signal or current signal output from the sensor into a distance (here, it is integrated with 6 for convenience), 6c is a numerical value input device for inputting the installation position of the measuring instrument, and 6 is It is a display device for displaying the converted data.

Furthermore, in the first embodiment, the spring 5 is inserted between the cylinder 2 and the cylinder 3, and the jig 3 for fixing the spring is fixed to the cylinder 3, and the spring 2 is fixed to the cylinder 2 in the same manner. The jig 8 for fixing is fixed. Normally, the elastic force of the spring stretches and the measuring instrument is shortened as shown in Fig. 1.

At the time of measurement, this measuring instrument is installed at a desired height, and the distance from the installation position of the reflection plate to the object to be measured is subtracted to measure the distance such as the height of the object to be measured. Further, as an operation in actual measurement, as shown in FIG. 2, the cylinder 3 is pulled out in the direction 3a of the object to be measured and the measurement plate 4 is applied to the object to be measured as shown in FIG.

Next, as a second embodiment, an embodiment of a height meter is shown in FIG. In FIG. 5, the measurement plate 11 moves in the vertical direction in the distance detection direction of the sensor 1, the detected wave is reflected by the sensor on the measurement plate 11, the distance between the measurement plate and the sensor is detected, and the measured object shown in FIG. The height of the person 15 is converted into a signal at 6a, and the height of the person to be measured is displayed at 6. Reference numeral 12 is a pulley for smoothly moving the measuring plate, 13 is a weight for balancing the measuring plate, and 12a is a thread connecting the measuring plate and the weight.

[0011]

As described above, the present invention can be installed at a desired position, and the distance can be easily measured based on the position. Further, since the sensor itself is completely fixed and there is no mechanical movement such as rotation, failure or deterioration in accuracy is unlikely to occur. Further, the measured distance can be sent as an electric signal to an electric display or a computer or the like attached to the outside, where it can be displayed or data can be stored.

[Brief description of drawings]

FIG. 1 is a front internal structure diagram in Embodiment 1 of the present invention.

FIG. 2 is a front internal structure diagram at the time of measurement according to the first embodiment of the present invention.

FIG. 3 is a measurement state diagram in the first embodiment of the present invention.

FIG. 4 is an explanatory view of conventional technology.

FIG. 5 is a perspective view of a distance measuring device according to a second embodiment of the present invention.

FIG. 6 is a measurement state diagram in the second embodiment of the present invention.

[Explanation of symbols]

 1 Ultrasonic sensor 1a Sensor detection direction 2 Tube 3 Tube 3a Detection wave direction 4 Reflector 5 Spring 6 Display device 6a Signal converter 6b Sensor and display connection code 6c Numerical input device 7, 8 Spring fixing jig 9 Measuring device movement Rail 10 Scale 11 Measuring plate 12 Pulley 12a Thread 13 Weight 14 Fixing plate 15 Measured person 16 Measured object (cow)

Claims (1)

[Claims] 1. A measuring instrument for measuring a distance, which comprises an ultrasonic distance sensor or an optical sensor 1 (hereinafter referred to as a sensor) and a reflection plate 4 for reflecting a detection wave emitted from the sensor 1. The plate 4 can freely move between the object to be measured and the sensor 1, and the signal detected between the sensor and the reflector is based on the installation position previously input by the converter 6a by the numerical value input device 6c. A distance measuring device which is converted into a distance to be actually measured, such as a height of the object to be measured from the ground, and the distance can be displayed on the electrical display unit 6.