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Wireless communication system
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A wireless communication system and wireless communication technology, applied in the field of wireless communication systems, can solve the problems of high wiring cost and a lot of time/labor for wiring, and achieve the effect of low cost
Inactive Publication Date: 2019-02-05
HITACHI CHEM CO LTD
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Description
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Problems solved by technology
In such a wired communication system, the cost of equipment such as wiring is high, and a lot of time and labor are required to connect the wiring.
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no. 1 Embodiment approach 》
[0025]
[0026] figure 1 It is a configuration diagram of the wireless communication system 100 according to the first embodiment.
[0027] The wireless communication system 100 is a system that performs wireless communication between the battery controller 2 as a master and a plurality of cell controllers 1A, . . . , 1X as slaves. like figure 1 As shown, the wireless communication system 100 includes unit controllers 1A, . . . , 1X, a battery controller 2, and a higher-level system controller 3 (control device).
[0028] In the unit controllers 1A, . The function of sending the information of measured values etc. to the battery controller 2. In addition, the battery cell groups accommodated in the battery packs PA, .
[0029] like figure 1 As shown, the unit controller 1A includes at least one measuring device 11 , a processing circuit 12 , a wireless circuit 13 and an antenna 14 .
[0030] The measuring device 11 is a sensor for detecting voltage, current, temperat...
no. 2 Embodiment approach 》
[0092] In the second embodiment, the time from the reception of the response request signal from the master to the transmission of the response signal is for each of the slaves A, B, ..., X (see Image 6 ) is different from the first embodiment, but the others are the same as the first embodiment. Therefore, portions different from those of the first embodiment will be described, and descriptions of overlapping portions will be omitted.
[0093] Image 6 It is an explanatory diagram showing processing executed by the master and slaves A, B, . . . , X in the wireless communication system according to the second embodiment.
[0094] also, Image 6 Step S202 of , and step S202 described in the first embodiment (refer to figure 2 )correspond. in addition, Image 6 Steps S309a, S310a of the same as described in the first embodiment figure 2 Steps S309, 310 (refer to figure 2 )correspond. In addition, the same applies to steps S309b, S310b, S309x, and S310x.
[0095] exi...
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Abstract
Provided is a wireless communication system for which the cost required for establishing a wireless communication connection is low. The wireless communication system is configured so that, as communication establishment processing for establishing communication between a parent device and child devices (A, B), the parent device wirelessly transmits a packet signal to the child devices while switching a plurality of frequencies in a first period, and the child devices (A, B) execute, until a packet signal from the parent device can be received, switching processing for switching the pluralityof frequencies used as child-device reception frequencies, such switching performed in a second period which is shorter than the first period, and if the packet signal has been received from the parent device, the child devices (A, B) wirelessly transmit a response signal to the parent device in response to a subsequent response-required signal from the parent device.
Description
technical field [0001] The present invention relates to a wireless communication system for performing wireless communication between a host computer and a plurality of slave computers. Background technique [0002] Conventionally, a wired communication system in which a master and a plurality of slaves are connected one-to-one via wiring has been used. In such a wired communication system, the cost of equipment such as wiring is high, and a lot of time and labor are required for connection of the wiring. Therefore, instead of a wired communication system, a wireless communication system for performing wireless communication between a master and a plurality of slaves has been proposed. [0003] For example, in Patent Document 1, it is described that in wireless communication between a vehicle and a portable device, the vehicle periodically receives two channels 1 and 2 from the portable device. In this case, channel 2 is used preferentially. [0004] Also, in Patent Docum...
Claims
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Application Information
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