Measurement system and vehicle

Abstract

To provide a measurement system and a vehicle, in which man-hours in installation operation can be reduced and the configuration of the system can be simplified.SOLUTION: A measurement system arranged so as to extend in a prescribed direction comprises: a conductor wire connected to a power supply at one end side in the prescribed direction; a slide terminal for collecting power from the conductor wire, which is arranged so as to be able to move contacting the conductor wire in a prescribed section between a first position corresponding to the one side in the prescribed direction and a second position away from the first position by a prescribed distance in the prescribed direction; and a calculation unit for calculating a moving position of the slide terminal, on the basis of a power supply voltage, an electrical value of the power collected by the slide terminal, a resistance value per unit length of the conductor wire, and a contact resistance value of the slide terminal.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a measurement system and a vehicle. [Background technology]

[0002] 2. Description of the Related Art There is known a surveillance camera that is movable along a rail provided on the ceiling of a luggage compartment of a vehicle.

[0003] There is also known a system in which striped tape is attached to the bottom surface of a rail, the number of stripes is counted by a photosensor built into the measuring device, and the position of the measuring device is identified based on the count result.

[0004] Furthermore, for example, Patent Document 1 describes a system that includes position markers arranged along rails, a receiver that receives position marker IDs transmitted from the position markers, and a position identification unit that identifies the position of a vehicle traveling on the rails based on the received position markers. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-27519 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in order to identify the position of the above-mentioned surveillance camera and the above-mentioned measuring device, it is necessary to attach sensors such as photo sensors and stick striped tape on the rails, which increases the amount of work required for installation and increases the number of parts that make up the device.

[0007] Furthermore, the system described in Patent Document 1 also requires tasks such as installing a receiver and placing position markers along the rails, which increases the amount of work required for installation and increases the number of components that make up the device.

[0008] An object of the present disclosure is to provide a measurement system and a vehicle that can reduce the number of steps required for installation and simplify the system configuration. [Means for solving the problem]

[0009] In order to achieve the above object, the measurement system in the present disclosure includes: A conductor arranged to extend in a predetermined direction and having one end connected to a power source in the predetermined direction; a sliding terminal that is movable between a first position corresponding to one side of the predetermined direction and a second position that is a predetermined distance away from the first position in the predetermined direction while being in contact with the conductor, and that collects current from the conductor; a calculation unit that calculates a moving position of the sliding terminal based on the voltage of the power source, the electrical value collected by the sliding terminal, the resistance value per unit length of the conductor, and the contact resistance value of the sliding terminal; Equipped with.

[0010] The vehicle in the present disclosure includes: A vehicle including the above measurement system, a luggage compartment, and a rail arranged on a ceiling of the luggage compartment so as to extend in the predetermined direction, The conductor is disposed on the rail, The sliding terminal is movably supported on the rail. [Effects of the Invention]

[0011] According to the present disclosure, it is possible to reduce the number of steps required for installation work and simplify the system configuration. [Brief explanation of the drawings]

[0012] [Figure 1]FIG. 1 is a schematic diagram of a measurement system according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a circuit diagram of the measurement system according to the embodiment of the present disclosure. [Figure 3] FIG. 3 is a functional block diagram of the measurement system according to the embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Fig. 1 is a schematic diagram of a measurement system according to an embodiment of the present disclosure. Fig. 2 is a circuit diagram of the measurement system according to an embodiment of the present disclosure. Fig. 3 is a functional block diagram of the measurement system according to an embodiment of the present disclosure.

[0014] The measurement system 100 in this embodiment is disposed in a vehicle. The vehicle in this embodiment is, for example, a winged vehicle equipped with a luggage compartment having a pair of left and right wing roofs with an L-shaped cross section, a front wall, and a rear door wall, and a center rail installed between the center of the front wall in the vehicle width direction and the center of the rear door wall in the vehicle width direction. Furthermore, the vehicle in this embodiment is a commercial vehicle equipped with an internal combustion engine such as a diesel engine as a drive source and used for delivering luggage, etc. Note that the vehicle in this disclosure is not limited to a winged vehicle.

[0015] The measurement system 100 in this embodiment includes a conducting wire 10, a sliding terminal 20, a measurement device 30, a first position detection unit 41 (see FIG. 3), and a second position detection unit 42 (see FIG. 3).

[0016] As shown in FIG. 1, the vehicle in this embodiment is provided with a center rail 2 arranged on the ceiling (not shown) of the luggage compartment so as to extend in a predetermined direction. H-shaped steel beams are used for the center rail 2. The center rail 2 corresponds to the "rail" in this disclosure. Note that although the center rail 2 is shown as the rail in this embodiment, the present disclosure is not limited to the center rail 2 and may be anything that has a predetermined strength and extends in a predetermined direction. In the following description, the center rail 2 may be simply referred to as a "rail."

[0017] Conductor 10 is arranged on rail 2 so as to extend in a predetermined direction. Battery 1 is connected to one end of conductor 10 in the predetermined direction. Battery 1 corresponds to the "power source" of the present disclosure. Note that battery 1 as the power source in this embodiment may be, for example, a dedicated battery connected to conductor 10, or may be a battery that supplies power to electrical components such as lights and wipers mounted on a vehicle. In the following description, battery 1 may also be referred to as the "power source."

[0018] As shown in Fig. 2, one side of a conductor 10 serving as a resistor in a predetermined direction is connected to the positive pole of a power source 1. The other side of the conductor 10 (resistor) in the predetermined direction is connected to a metal part of the vehicle body and is body grounded. Note that the following description will be given assuming that the voltage of the power source 1 (power source voltage) is known. As shown in Fig. 2, the negative pole of the power source 1 is body grounded.

[0019] The sliding terminal 20 is movable between a first position corresponding to one side of the conductor 10 in a predetermined direction and a second position a predetermined distance away from the first position in the predetermined direction, while remaining in contact with the conductor 10. This allows the sliding terminal 20 to collect current from the conductor 10.

[0020] As shown in FIG. 3, the measuring device 30 includes a device main body 31, an ammeter 32, a voltmeter 33, a control unit 35, and a storage unit 39.

[0021] The device body 31 is supported by the rail 1 so as to be movable integrally with the sliding terminal 20. In other words, the travel distance of the measuring device 30 is a predetermined distance in a predetermined section. In the following description, the predetermined distance is assumed to be known. The measuring device 30 is equipped with an electric motor (not shown) and moves autonomously along the rail 1 using the electric motor as a power source.

[0022] The positive terminal of ammeter 32 is connected to sliding terminal 20. The positive terminal of voltmeter 33 and one terminal of resistor 34 are connected in parallel to the negative terminal of ammeter 32. The negative terminal of voltmeter 33 and the other terminal of resistor 34 are connected to the body earth. Note that resistor 34 is a component that consumes power, such as control unit 35 or an electric motor.

[0023] This enables ammeter 32 to measure the current collected by sliding terminal 20. Also, voltmeter 33 can measure the voltage at each of the first and second positions of sliding terminal 20. The measured values ​​of ammeter 32 and voltmeter 33 are sent to control unit 35 at predetermined time intervals. The measured values ​​of ammeter 32 and voltmeter 33 correspond to the "electrical value" in this disclosure.

[0024] Each of the first position detector 41 and the second position detector 42 is, for example, a limit switch. When the sliding terminal 20 moves to the first position, the first position detector 41 detects the sliding terminal 20 that has moved to the first position via the device body 31. When the sliding terminal 20 moves to the second position, the second position detector 42 detects the sliding terminal 20 that has moved to the second position via the device body 31. The detection results of the first position detector 41 and the second position detector 42 are sent to the control unit 35. Note that, in the present embodiment, limit switches are shown as the first position detector 41 and the second position detector 42, but the present disclosure is not limited thereto and may be, for example, a proximity sensor.

[0025] The measuring device 30 functions as a control unit 35, a storage unit 39, and a communication unit (not shown). In FIG. 3, arrows indicate the main data flows, and there may be data flows not shown in FIG. 3. In FIG. 3, each functional block indicates a functional unit configuration, not a hardware unit configuration. Therefore, the functional blocks shown in FIG. 3 may be implemented in a single device, or may be implemented separately in multiple devices. Data may be exchanged between functional blocks via any means, such as a data bus.

[0026] The memory unit 39 includes a ROM (Read Only Memory) that stores the BIOS (Basic Input Output System) of the computer that realizes the measuring device 30, a RAM (Random Access Memory) that serves as the working area of ​​the measuring device 30, an OS (Operating System), application programs, and a HDD that stores data referenced when the application programs are executed.

[0027] The control unit 35 is a processor such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit) in the measuring device 30, and executes application programs stored in the storage unit 39. The control unit 35 functions as an acquisition unit 36 ​​and a calculation unit 37 by executing the application programs.

[0028] The acquisition unit 36 ​​acquires measurement values ​​sent from the ammeter 32 and the voltmeter 33, and acquires detection results sent from the first position detection unit 41 and the second position detection unit 42. The control unit 35 stores the acquired measurement values ​​and detection results in the memory unit 39. The memory unit 39 stores a known power supply voltage and a known predetermined distance (the distance traveled by the measuring device 30). In the following description, the measurement values ​​and detection results acquired by the acquisition unit 36 ​​may be referred to as "acquired information." Furthermore, the known power supply voltage and predetermined distance may be referred to as "known information."

[0029] The calculation unit 37 calculates the movement position of the sliding terminal 20 (the movement position of the measuring device 30) by referring to a predetermined formula based on the acquired information and known information. The calculation unit 37 also calculates the resistance value of a predetermined section by referring to a predetermined formula based on the acquired information and known information. The calculation unit 37 then calculates the resistance value per unit length of the conductor 10 based on the calculated resistance value of the predetermined section. The control unit 35 controls the communication unit (not shown), for example, to display the calculation results on a display unit (not shown). The method by which the calculation unit 37 calculates the movement position of the sliding terminal 20, the method by which the calculation unit 37 calculates the resistance value of the predetermined section, and the method by which the calculation unit 37 calculates the resistance value per unit length of the conductor 10 will be described in detail below.

[0030] Next, the position L of the sliding terminal 20 calculated by the calculation unit 37 s The calculation method for calculating the position L of the sliding terminal 20 will be described below. As described above, the power supply voltage and the predetermined distance are known. The calculation unit 37 calculates the position L of the sliding terminal 20 by referring to the following formula based on the acquired information and known information described above. s Calculate.

[0031] Position L of sliding terminal 20 s (hereinafter referred to as the voltage V s ) can be expressed by the following equation (1):

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[0032] The modified form of equation (1) is expressed as equation (2).

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[0033] First, the first position (L s = 0) the contact resistance Z of the sliding terminal 20 s Measure. In equation (1), L s The equation with =0 substituted is expressed as equation (3).

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[0034] A modified version of equation (3) is expressed as equation (4).

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[0035] Next, the measuring device 30 is moved so that the sliding terminal 20 moves to the second position. r is known. Equation (5) is obtained by substituting Ls=Lr into equation (1).

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[0036] A modified version of equation (5) is expressed as equation (6).

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[0037] A modified version of equation (6) is expressed as equation (7).

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[0038] A modified version of equation (7) is expressed as equation (8).

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[0039] The calculation unit 37 calculates the power supply voltage V cc , resistance value R m , measurement value I s ,V s , and contact resistance Z s By substituting the above, the position L of the sliding terminal 20 s Calculate.

[0040] The measurement system 100 in the above embodiment comprises a conductor 10 arranged to extend in a predetermined direction and having a power source 1 connected to one end side in the predetermined direction, a sliding terminal 20 movable while in contact with the conductor 10 over a predetermined section between a first position corresponding to one end in the predetermined direction and a second position a predetermined distance away from the first position in the predetermined direction, and collecting current from the conductor 10, and a calculation unit 37 that calculates the movement position of the sliding terminal 20 based on the voltage of the power source 1, the electrical value collected by the sliding terminal 20, the resistance value per unit length of the conductor 10, and the contact resistance value of the sliding terminal 20.

[0041] According to the measurement system 100, the number of parts can be reduced, thereby reducing the number of steps required for installation and simplifying the system configuration.

[0042] Furthermore, in the measurement system 100 according to the above embodiment, the calculation unit 37 calculates the contact resistance value based on the first electrical value collected by the sliding terminal 20 that has been moved to the first position. This makes it possible to calculate the contact resistance value by moving the sliding terminal 20 to the first position.

[0043] Furthermore, in the measurement system 100 according to the above embodiment, the calculation unit 37 calculates the resistance value of a predetermined section of the conductor 10 based on the first electrical value, the second electrical value collected by the sliding terminal 20 moved to the second position, and the predetermined distance, and calculates the resistance value per unit length based on the calculated resistance value of the predetermined section. This makes it possible to calculate the resistance value per unit length by moving the sliding terminal 20 to the second position.

[0044] Furthermore, the measurement system 100 in the above embodiment further includes a first position detector 41 that detects the sliding terminal 20 that has moved to the first position, and a second position detector 42 that detects the sliding terminal 20 that has moved to the second position. Thus, by providing the first position detector 41 and the second position detector 42, it becomes possible to detect that the sliding terminal 20 has moved to the first position and the second position.

[0045] Furthermore, the vehicle in the above embodiment is a vehicle equipped with measurement system 100, a luggage compartment, and rails 2 arranged on the ceiling of the luggage compartment so as to extend in a predetermined direction, with conductors 10 arranged on rails 2 and sliding terminals 20 movably supported on rails 2. By using H-beams arranged on the ceiling of the luggage compartment of a wing truck as the rails and allowing measurement device 30 to run along the H-beams, it is possible to easily retrofit measurement device 30 without requiring additional processing on the vehicle or the installation of additional members.

[0046] In the above embodiment, the resistance value per unit length of the conductor 10 changes over time, so the resistance value was updated (corrected). However, the resistance value may be corrected each time the calculation unit calculates the resistance value of a section, or may be corrected every time a certain period of time elapses, or may be corrected to the newly calculated resistance value when the difference between the resistance value currently in use and the newly calculated resistance value exceeds a predetermined threshold value.

[0047] In addition, in the above embodiment, the rail 2 and the conductor 10 are configured as separate bodies, but the present disclosure is not limited to this. For example, if the rail 2 is conductive and satisfies the usage mode, the rail 2 and the conductor 10 may be configured as an integral body.

[0048] Furthermore, the above-described embodiments are merely examples of specific embodiments for carrying out the present disclosure, and the technical scope of the present disclosure should not be interpreted as being limited by these embodiments. In other words, the present disclosure can be carried out in various forms without departing from its gist or main features. [Industrial Applicability]

[0049] The present disclosure is suitably used for vehicles equipped with a measurement system that requires a reduction in the number of steps required for installation and a simplification of the device configuration. [Explanation of symbols]

[0050] 1 power supply 2 Rails 10 conductors 20 Sliding terminal 30 Measuring Equipment 31 Device body 32 Ammeter 33 Voltmeter 34 resistor 35 Control Unit 36 Acquisition Department 37 Calculation section 39 Memory section 41,42 Limit switch 100 Measurement System

Claims

1. A conductor arranged to extend in a predetermined direction and having one end connected to a power source in the predetermined direction; a sliding terminal that is movable between a first position corresponding to one side of the predetermined direction and a second position spaced a predetermined distance from the first position in the predetermined direction while being in contact with the conductor, and that collects current from the conductor; a calculation unit that calculates a moving position of the sliding terminal based on the voltage of the power source, the electrical value collected by the sliding terminal, the resistance value per unit length of the conductor, and the contact resistance value of the sliding terminal; Equipped with Measurement system.

2. the calculation unit calculates the contact resistance value based on a first electrical value collected by the sliding terminal that has moved to the first position. The measurement system of claim 1 .

3. the calculation unit calculates a resistance value of the predetermined section of the conductor based on the first electrical value, a second electrical value collected by the sliding terminal that has moved to the second position, and the predetermined distance, and calculates the resistance value per unit length based on the calculated resistance value of the predetermined section. The measurement system of claim 2 .

4. a first position detection unit that detects the sliding terminal that has moved to the first position; a second position detection unit that detects the sliding terminal that has moved to the second position; Further provided with The measurement system of claim 1 .

5. A vehicle comprising the measurement system according to claim 1, a luggage compartment, and a rail disposed on a ceiling of the luggage compartment so as to extend in the predetermined direction, The conductor is disposed on the rail, The sliding terminal is movably supported on the rail. vehicle.

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