JPH04313092A - Range finder - Google Patents

Abstract

PURPOSE:To make it possible to measure a distance simply by providing a constitution comprising a transceiver device for waves having two kinds of transmitting speeds so that a distance to be measured is obtained with the speed difference as a function. CONSTITUTION:A requesting signal TS for measuring the distance is transmitted to a pole P, on which two kinds of transceiver devices are mounted, from a person H at a certain position. A range finder M having the transceivers for two transmitting speeds, which is mounted on the pole P, receives the signal TS and immediately transmits the electric driving signals so as to drive the respective transmitting devices. The transmitted signals are received with the person H, who gives the order for distance measurement, in the forms of the transmitting speeds of SR and SU. The specified numbers are displayed on a range finder TR having the display device housing a converter at the order- giving person's hands.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distance meter.

0002

[Prior Art] Conventionally, in principle, it is possible to know the distance between your meter and the source of lightning based on a signal that has a speed difference between light and sound, such as lightning. This is similar to the method that can be roughly estimated based on the time it takes to receive the signal, but the feature of the present invention is to combine infrared light or electromagnetic waves with a transmitting/receiving device in the ultrasonic band and calculate the distance using the time difference as a function. It's true. Specifically, I have not found anything that uses two types of transmitting/receiving devices to measure these phenomena as a distance meter.

0003

[Problems to be Solved by the Invention] As described above, the rangefinder of the present concept with specificity is designed to transmit electric signals SE for driving two types of transmitting/receiving devices over time as shown in FIG. t
The respective signals SR and SU received at a point at a predetermined distance d after being applied to the respective transmitting/receiving devices at time 0 are generated by transmitting an electromagnetic signal SR at t1, a very short time after the time t0 at which the drive signal was issued. and then receives an ultrasonic signal SU at time t2. That is, depending on the type of transmitting/receiving device having different transmission speeds, the time t required to reach a predetermined distance is proportional to the reciprocal of the speed v. As a result, |t1−t2
| can be expressed as a function of the measured distance d as follows. d=f(k|v1-v2|) where k is a correction coefficient determined by the type of medium, temperature, and pressure. The present invention solves these problems by using an electromagnetic wave or infrared band transmitter/receiver for v1 and an ultrasonic transmitter/receiver for v2.

0004

[Means for Solving the Problems] In the present invention, as shown in the model in FIG. A request signal TS for measuring d is transmitted. The stick that received the signal (
The distance meter (M) equipped with a transmitter/receiver with two transmission speeds mounted on P) immediately emits an electric drive signal to drive each transmitter, and the emitted signal is transmitted at each transmission speed. In v1 and v2, the data is received by a human (H) who is an orderer of distance measurement using SR and SU types, and a predetermined number is displayed on a distance meter TR equipped with a display device with a built-in converter under the orderer. will be displayed and you can measure the desired distance.

[0005]

[Embodiment 1] As an embodiment of the present invention, when a golf player wants to know the distance to the pole P, he first uses a wireless transmitter/receiver TR to transmit an ultrasonic wave and an electromagnetic wave or an infrared band. A command signal tS is sent to a distance measuring signal transmitter M equipped with a distance measuring signal transmitter M. In response, two predetermined response signals SR and SU are received from the transmitter/receiver M by the transmitter/receiver TR located at the golfer's side, and after processing the signals, the distance between the golfer and the pole is shown on the display and the desired distance is determined. be measured.

[0006]

[Embodiment 2] Although similar to the previous embodiment, there is a requester who wants to measure the distance from a transmitter M equipped with two transmission speeds attached to an actual pole while providing a predetermined time interval. Even when a command signal is not sent, the receiver receives a distance signal from the transmitter M, which automatically transmits, and can know the target distance. This case also falls within the scope of a rangefinder equipped with a transmitting/receiving device capable of responding to two or more transmission speeds, which is a feature of the present invention.

[0007]

[Effects of the Invention] As described above, according to the present invention, since it is possible to easily measure distance, it is expected to find application in a wide range of fields and is expected to have industrial value.

[Brief explanation of drawings]

FIG. 1 shows a signal model on the time axis to illustrate the principle of the distance meter of the present invention.

FIG. 2 shows a typical example of the present invention, where H is a human (
This shows a model when a command) measures distance toward a rod P, where TR represents a transmitting/receiving device, M represents a transmitting/receiving device having two transmission speeds, and P represents a pole on which M is mounted.

[Explanation of symbols]

SE Electrical drive signal SR Electromagnetic signal SU Ultrasonic signal t0 Electrical signal generation time t1 SR reception time t2 SU reception time H Human (command) TR Transmitter/receiver M Transmitter/receiver device with two transmission speeds P Pole

Claims (3)

[Claims] [Claim 1] At least two types of transmission speed v1
, v2, and is characterized in that the measured distance d can be determined as a function of the speed difference |v1-v2|. 2. A rangefinder characterized in that one of the at least two transmitting and receiving devices is an antenna for an ultrasonic band, and the other is an antenna for an electromagnetic band. 3. A distance meter, wherein one of the at least two transmitting/receiving devices operates in an ultrasonic band, and the other transmitting/receiving devices operate in an ultrasonic band.